SMART GRIDS Dalle Smart Grids alle Smart Cities - i sistemi elettrici del futuro - Levi Cases

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CONTINUA A LEGGERE
SMART GRIDS
          i sistemi elettrici del futuro

Dalle Smart Grids alle Smart Cities
               Carlo Alberto Nucci

   DEI – Guglielmo Marconi – Università di Bologna

              carloalberto.nucci@unibo.it

               Lunedì 28 ottobre 2015
             Aula Magna, Palazzo del Bo
                      Padova
1

Smart City
Smart City: definizione?
Smart City: definizione?
Smart City: definizione?
1
              Bologna Smart City: strategies overview

                     2

                                         3

                                                           4

                                                                                   5

                                                                                                    6
    Smart Energy         Smart               Smart             Smart People            Smart            Smart Living
                         Mobility            environment                               Government
    Renovation of                                              Inclusiveness                            Data
    the built            Pedestrian          Safety                                    Digital          management
                         and bicycle                                                   Agenda
                                                               Smart devices
                         mobility
    environment                              Waste                                                      Business
                                             management                                Cloud            Innovation
                         Intermodality                                                 &Crowd
    Smart grids
                                             Water                                     System
                                                                                                        e.services
                                                               Social Innovation
                         Last mile           Management
    Smart lighting
                         logistic                                                      Cultural
                                                                                       Heritage
                                                                                       promotion
EU Smart Cities Stakeholder Platform:
                           11 priority areas
                                         3 ‘vertical’ domains
8 ‘horizontal’ enabling
themes
2

Smart Grid
Potenza elettrica installata in Italia

        Potenza efficiente lorda degli impianti
        elettrici di generazione in Italia al 31.12.14
Smart Grid
Anche la rete elettrica tradizionale è smart
Intentional islanding/reconnection – PMU

   Case description
80 MW power plant:
two aeroderivative gas turbine (GT) units and
a steam turbine unit (ST) in combined cycle;
PP connected to a 132 kV substation feeding
a urban medium voltage (MV) distribution
network;
PP substation is linked, by means of a cable
line, to the 132 kV substation that feeds 15
feeders of the local medium voltage (15 kV)
distribution network and provides also the
connection with the external transmission
network throughout circuit breaker BR1.
Proc. UPEC, Padua, Italy, Sept 2008

           Intentional islanding/reconnection – PMU
Islanding maneuver
 PP is equipped with a PMS that:
- Operates BR1 for the disconnection of the
  network from the external grid;
- Communicates the “Load Droop Anticipator
  command” to the ST control system in case of
  islanding maneuvers accomplished at rather
  large power exported levels to the transmission
  network;
- Disconnects MV feeders following a predefined
  priority list in order to guarantee the load
  balance;
- selects the operation control mode of the two
  gas turbines (master and slave) for the
  frequency regulation of the network in islanded
  conditions;                                                 GT1                        GT2
 Islanding capabilities   tested with EMTP-RV.                                      ST
Intentional islanding/reconnection – PMU

Islanding of GT1: Distribution network voltage
     phasors angles differences during the

                                                         3
                                                     2

                                                 1
Intentional islanding/reconnection – PMU
Reconnection maneuver

  A feedback of the PMU
  measurements was given to the
  PP operator.
  The synchro-check relay and the
  synchronizing PMS action
  permitted the smooth
  reconnection maneuver.
  While the PMS controls the power
  plant units in order to allow a
  reliable reconnection maneuvers
  of the network to the external grid.
Intentional islanding/reconnection – PMU

                                                               Reconnection of GT1:
                                                         Voltage phasors angle differences
                                              200                                                  0.21
Angle difference between positive-sequence

                                                                                                          Angle difference between positive-sequence
components of PMU2 and PMU3 phasors (°)

                                                                                                          components of PMU1 and PMU2 phasors (°)
                                                             PMU2-PMU3
                                                0                                                                                                          Identification of
                                                             PMU1-PMU2
                                              -200                                                 0.2                                                 the correct phase
                                              -400                                                                                                     difference between
                                                                                                   0.19
                                              -600                                                                                                     islanded and
                                              -800                                                                                                     external network to
                                                                                                   0.18
                                             -1000                                                                                                     trigger the
                                             -1200                                                 0.17
                                                                                                                                                       reconnection
                                             -1400                                                                                                     maneuver.
                                             -1600                                                 0.16
                                                     0      10     20       30      40   50   60
                                                                         Time (s)
Intentional islanding/reconnection – PMU

                             PMU measured frequency transient
                 50.15
                                                                PMU1
                                                                                Monitoring of the
                                                                            frequency difference
                                                                PMU2
                  50.1                                                      (positive) between the
                                                                PMU3
Frequency (Hz)

                                                                            islanded network
                 50.05                                                      (PMU1 and PMU2)
                                                                            and the external
                   50
                                                                            network (PMU3).

                 49.95
                         0      10    20      30      40   50          60
                                           Time (s)
3

Smart Grid per Smart
       Cities
Smart City: definizione?

The Smart Cities Council is a for-profit, Partner-led association for the advancement of the
smart city business sector. It promotes smart cities in general and our Partners in particular.
Allied Telesis Alstom Grid Bechtel Cisco Cubic Transportation Systems -
Enel GE IBM Itron, Inc. MasterCard Mercedes-Benz Microsoft
Ooredoo Qualcomm S&C Electric Co. Schneider Electric
Partendo dall’Utenza integrata
[da R. Caldon]
Si dovrà arrivare ad una rete completamente
integrata [da R. Caldon]
http://esmig.eu/page/enabling-smarter-energy-world
http://iperbole2020.tumblr.com/smartcity
La Piattaforma Bologna Smart City
“Le smart city sono sistemi intelligenti e sostenibili, aree urbane
                                    In sintonia con
che pianificano coerentemente l’integrazione         delle diverse
                                    Regione
caratteristiche identitarie del proprio   territorio - culturali,
economiche, produttive, ambientali  CNR,- inENEA,   Lepida,
                                              un’ottica       imprese
                                                         di innovazione.
                                    locali estrada
Bologna ha scelto di percorrere questa         nazionali,..
                                                     nel solco della
                                    Piano
propria tradizione civica, attraverso        Strategico
                                       un’alleanza    tra mondo della
                                    Metropolitano
ricerca ed Università, imprese e pubblica      amministrazione per
sviluppare soluzioni utili ad affrontare problematiche urbane e
sociali, mettendo le tecnologie al Per   l’Università
                                     servizio           di Bologna
                                                delle persone”
                                       pieno coinvolgimento del
                                    Gruppo di Lavoro ‘Smart
                                    City’ dell’Alma Mater
                                    Studiorum
                                                              24
La Piattaforma Bologna Smart City
30 luglio 2012 - http://www.unibo.it/it/ricerca/progetti-e-iniziative/bologna-smart-city

                                          In sintonia con
                                          Regione
                                          CNR, ENEA, Lepida, imprese locali
                                          e nazionali,..
                                          Piano Strategico Metropolitano

                                          L’impegno dell’Alma Mater
                                          all’interno della Piattaforma si
                                          avvale del contributo del Gruppo
                                          di lavoro “Bologna Smart City”
                                          coordinato da C.A. Nucci
                                     http://www.magazine.unibo.it/archivio/2012/bologna_smart_city
                                                          http://iperbole2020.tumblr.com/smartcity
                                               http://www.aster.it/tiki-read_article.php?articleId=717
                                                                              25
Prof. Danilo Montesi
                                                                                              Oplon
                                        MIUR
                         Smart cities and social innovation
      Art 1: …. The Ministry of Education, University and Research (MIUR henceforth), in line with
     the European guidelines of "Horizon 2020," the guidelines the European Digital Agenda, the
     National Plan for E-Government, actions underway in the framework of the Digital Agenda
     Italian, attributes to interventions in the field of Smart Cities and Communities the value of a
                 strategic priority for the entire national research policy and innovation.

                                            14.5M€
                                            Line of intervention: ageing of the society
                                            Partners:
                                            -   4 large companies
                                            -   4 SME
                                            -   5 research institutions
                   **                       Formal commitment from:
                         *                  -
                                            -
                                                Ministry of Health
                                                regional governments and health agencies (4),
                             *              -   healthcare local institution (4)
                                            -   municipalities of major impacted towns (3)
                                        *   -   associatations (GPs, municipalities & healthcare institutions)

                                                                             OPLON: costo 773.558,99
                                                                              (contributo 618.847,19)

Agenzia sanitaria e sociale regionale                                                                     26
Proff. Armando Brath
                                  e Sandro Artina
                                                                        Watertech

WATERTECH: costo 620.000
(contributo 496.000)

                                                              Prelocalizzazione
                                    Progetto                  PERDITE IDRICHE
                                SMART WATERTECH

                                                                                               Monitoraggio ACQUE
                                   SMART WATER METERING                                            PARASSITE
                                     (modelli di previsione
                                    domanda e tariffazione)

                                                                                      Sistemi di CONTROLLO ed
                                                                                    ATTUAZIONE in TEMPO REALE
                                                                                   (pressione, qualità delle acque)
                                   Monitoraggio
                               SCARICATORI DI PIENA

                                                                                  Rilevamento inquinanti mediante
                                                                                       IMMAGINI SATELLITARI
RIGERS – RIGENERAZIONE DELLA CITTÀ: EDIFICI E RETI INTELLIGENTI
ICIE - CPL - SACMI - CMC - SATA - CNR ICT - UNIBO (DA - DEI – DICAM)         Prof. Andrea Boeri
Decreto Direttoriale 13 febbraio 2014 n.428 - BANDO SMART CITIES NAZIONALE

Ambito di interesse primario:
Ambito di interesse secondario:
                                  ARCHITETTURA SOSTENIBILE E MATERIALI
                                  SICUREZZA DEL TERRITORIO
                                                                                 Rigers
Ambito di interesse secondario:   SMART GRIDS

RIGERS: costo 799.096,24
(contributo 639.276,99)
RIQUALIFICAZIONE, RIGENERAZIONE E VALORIZZAZIONE DEGLI INSEDIAMENTI DI EDILIZIA SOCIALE AD ALTA INTENSITÀ
ABITATIVA NELLE PERIFERIE URBANE NELLA SECONDA METÀ DEL ‘900 – PRIN 2008 DA UNIBO
IPOTESI RIQUALIFICAZIONE DELL’EDIFICIO VIRGOLONE: QUARTIERE PILASTRO BOLOGNA

                                                                                                             FABBISOGNO ENERGETICO ATTUALE
                                                                                                           118,54 kWh/m2y

                                                                                                     RIDUZIONE DEL CONSUMO DI ENERGIA
                                                                                                                                24,86
                                                                                                                                kWh/m2y

UNIVERSITÀ DI BOLOGNA – DIPARTIMENTO DI ARCHITETTURA – A. Boeri – E. Antonini – D. Longo – R. Roversi – G. Chieregato
CASO STUDIO: COMPLESSO RESIDENZIALE “PILASTRO” – BOLOGNA
E2SG
                           Energy to Smart Grid

   T4.11 Demonstration of storage optimization by
   exploiting electric vehicles
   D4.11 Simulator of storage optimizing policies
Luca Bedogni (IUNET-luca.bedogni4@unibo.it), Luciano Bononi (IUNET-
luciano.bononi@unibo.it), Alberto Borghetti (IUNET – alberto.borghetti@unibo.it),
Riccardo Bottura (IUNET - riccardo.bottura2@unibo.it), Alfredo D’Elia (IUNET-
alfredo.delia4@unibo.it), Federico Montori (IUNET-federico.montori2@unibo.it), Carlo
Alberto Nucci (IUNET – carloalberto.nucci@unibo.it), Elisa Pitti (HERA-
Elisa.Pitti@gruppohera.it), Tullio Salmon Cinotti (IUNET-tullio.salmoncinotti@unibo.it)

                                         Final Review E2SG
                                         October 21/22 2015, Berlin
                             E2SG INTERNAL/CONFIDENTIAL   Copyright @ E2SG Consortium   www.e2sg-project.eu
T4.11 – Simulator of storage policies of EVs
Overview
                  WP3 Grid Topology & Control
                                                                            WP4 Demonstrators

         3.4 Advanced storage management policies                             4.11 Demonstration of
                                                                              storage optimization by
                                                                              exploiting electric vehicles

Objectives:
- Development of a co-simulation platform that integrates a mobility simulator of
the electric vehicles and their charging requests with a dynamic simulator of the
power distribution network.
- Implementation and tests of control functions able to limit the impact of electric
vehicle charging on power distribution.

Deliverable (M36 available)

                E2SG INTERNAL/CONFIDENTIAL    Copyright @ E2SG Consortium            www.e2sg-project.eu     p. 31
T4.11 – Simulator of storage policies of EVs
Architecture of the co-simulation environment

          E2SG INTERNAL/CONFIDENTIAL   Copyright @ E2SG Consortium   www.e2sg-project.eu   p. 32
Mobility simulator: OMNET++ - SUMO - Veins - Openstreetmap
                                                                              Traffic Simulation Framework

   Simulator for analysis of traffic including EV
   and EVSE entities in realistic scenarios
   (including support for ext. services and
   apps).
           Based on Omnet++, SUMO, Veins
           and Openstreetmap
           Accurate modeling of city scenarios
           and multiple eMobility entities
           Modeling and control of traffic
           (realistic data vs. model assumptions)
           Modeling EV and EVSE parameters,
           their distribution, use and location
           Integrated with Storage Information
           Broker (SIB)-based service platform
           for integration support of external
           apps and services

                   E2SG INTERNAL/CONFIDENTIAL   Copyright @ E2SG Consortium     www.e2sg-project.eu          p. 33
Power Distribution simulator: EMTP-rv

     Model of the aggregated unbalanced loads (constant
     impedance / current / power) that includes the EVSE
     profiles: the amplitude of a triplet of current sources
     is controlled by a feed-back regulator in order to inject
     or absorb the requested value per-phase of active and
     reactive power.
                 PHASE 1                          PHASE 2                    PHASE 3

      P

      Q

                  E2SG INTERNAL/CONFIDENTIAL   Copyright @ E2SG Consortium    www.e2sg-project.eu   p. 34
Scheme for the interface between the model of urban traffic
and the power distribution system simulator
Model of the electric power                                      Model of the urban traffic
   distribution system              ID of active EV charging
                                      systems and power           Initial occupation of EV
     Initial power flow                                               charging systems

 Transient 3ph simulation                                             Traffic simulation
         (Δt=1ms)                  ID of active EV charging              (Δt=100ms)
                                    systems and maximum
Model of nodal aggregated                power profile          Start and end of charging of
(1ph and 3ph) EV charging                                        individual EV at a specific
          systems                                                      charging station
    Check of network
 constrains by using IEDs
                                                                 Update of charging profile
       information                Limitation of the power for
                                    each specific active/idle   and duration due to electric
                                      EV charging system
  Networked control EV                                              network limitations
    charging systems

                          Model of the communication network
Synchronization between the model of urban traffic and the
power distribution system simulator
    Windows                          Linux                                   Linux
     EMTP-rv                                                       OMNET++ & SUMO
                        Socket                    Socket

                                                                    Reservation event

   Load change                         SIB                                EVSE plug
                                    (Storage
 Network operating                Information)                         EVSE charging
     condition                          +
                                       WS
   EVSE profile                   synchronizer                          EVSE profile

    load change                                                         EVSE unplug

                                                           *EVSE: electric vehicles supply equipment

                                                                                e.g.: OPNET,
                  External SW 1   External SW 2       External SW n             CityService,
                                                  …                             Smartphone App,
                                                                                …
Description of test case
SB: MV/LV Substation equipped with a 15 kV/ 400 V transformer every that feeds the
LV distribution lines.
                Locations of EVSEs in
                              Bologna

               10 EVSEs at each
               location.

SUMO generates a new car every 2 s.
 Top view of the map of Bologna with
 the indication of parking lots with
 EVSE clusters (orange bullets),
 HV/MV substations (blue rectangles),
 and the two 15kV feeders from
 substation SB_A that connects the
 EVSE clusters denoted as EVSE_1,
 EVSE_2, EVSE_3, and EVSE_4
             MV line
          HV/MV SB
Test case
SB: MV/LV Substation equipped with a 15 kV/ 400 V transformer every that feeds the
LV distribution lines.
                     Present locations of
                       EVSEs in Bologna
               10 EVSEs at each
               location.

SUMO generates a new car every 2 s.
 Top view of the map of Bologna with
 the indication of parking lots with
 EVSE clusters (red round), HV/MV
 substations (blue rectangles), and the
 two 15kV feeders from substation
 SB_A that connects the EVSE
 clusters denoted as EVSE_1,
 EVSE_2, EVSE_3, and EVSE_4
              MV line
           HV/MV SB
Multi agent system for the distributed control of
charging stations
  Hypotheses:
  • One agent (i.e. a control system connected to the shared communication network) to each
    MV/LV transformer that feeds a cluster of EVSE units.
  • The intelligent electronic devices (IEDs) are installed at the HV/MV substation and at the
    feeder branches that may reach their maximum current rate during the operation of the
    distribution network.
  • One IED at the beginning of each feeder connected to the secondary side of the HV/MV
    transformer.
  • This IED measures the current and compares the value with the maximum operation current
    value of the line.
                                                                                                   ∆t  e + e j ,t −1  
   Each IED calculates and broadcasts, over                   ∆prj ,t = Kc ( e j ,t − e j ,t −1 ) +  j ,t            
   UMTS cellular network, the variation of a                                                       τ I    2          
   congestion index:                                                                          i j ,t − i j ,max
                                                                         where e j ,t =
   Each agent associated to an EVSE cluster                                                        i j ,max
   updates its own congestion index and fixes
   the maximum power that could be
                                                                              pri ,t = max(1, pri ,t −1 + ∆prj ,t )
   absorbed from the MV network:
            Could you explain the physical                                                  )
                                                                                            PEVSEi ,t         maximum requested
            meaning of the constants Kc &                                     PEVSEi ,t =                     charging power at
            t1? Why 0.2 and 0.1?                                                              pri ,t          time t

                   E2SG INTERNAL/CONFIDENTIAL   Copyright @ E2SG Consortium                  www.e2sg-project.eu              p. 39
Test case

  The simulations are repeated for two different BLER values: 1E-5 (case
  indicated as BLER0) and 0.1 (BLER1), which is a typical reference
  performance value (e.g. [21]).

  The same simulations are repeated with the BT (case indicated as BT1) and
  without the BT (BT0). BT is generated by the UEs associated to the agents
  and by seven additional UEs and two traffic receivers. The two adopted
  mobile users application models are characterized by two different gamma
  distributions of the inter-arrival packet time in s (with parameters 0.0068, 5
  and 0.2, 0.5, respectively) and exponential distributions of packet size in
  bytes (with parameters 41.03 and 62.97, respectively).

              E2SG INTERNAL/CONFIDENTIAL   Copyright @ E2SG Consortium   www.e2sg-project.eu   p. 40
Current values (in p.u. of the maximum operating
                                              Test case results                                      ∆t = 1 s           current) measured by the IEDs associated to the first
                                                                                                                        branch of the two considered feeders:
                                                                                                                                     1.014
                                                                                                                                                                                         feeder 1 (EVSE_1, EVSE_2) - BT0 BLER0
                                             Number of charging EVs in each cluster:                                                 1.012                                               feeder 1 (EVSE_1, EVSE_2) - BT1 BLER1
                                                                                                                                                                                         feeder 2 (EVSE_3, EVSE_4) - BT0 BLER0
                                                                                                                                        1.01                                             feeder 2 (EVSE_3, EVSE_4) - BT1 BLER1
                                        10

                                                                                                                    Current (p.u.)
    N° of Electric Vehicles connected

                                                                                                                                     1.008
                                         9                                                                                           1.006

                                         8                                                                                           1.004

                                                                                          EVSE_1                                     1.002
                                         7
                                                                                          EVSE_2                                                         1
                                         6                                                EVSE_3                                     0.998
                                                                                          EVSE_4                                                             400 420 440 460 480 500 520 540 560 580 600 620 640 660 680 700
                                         5                                                                                                                                               Time (s)
                                         4
                                                                                                                        Congestion index variations calculated by the IEDs:
                                                                                                                                           3.E-02
                                         3                                                                                                                                                feeder 1 (EVSE_1, EVSE_2) - BT0 BLER0
                                             400 420 440 460 480 500 520 540 560 580 600 620 640 660 680 700                               3.E-02                                         feeder 1 (EVSE_1, EVSE_2) - BT1 BLER1
                                                                        Time (s)                                                                                                          feeder 2 (EVSE_3, EVSE_4) - BT0 BLER0
                                                                                                                                           2.E-02                                         feeder 2 (EVSE_3, EVSE_4) - BT1 BLER1

                                                                                                                   ∆pr
                                                                                                                                           2.E-02
                                              Power requested by each cluster:                                                             1.E-02
                                        460                          EVSE_1 - BT0 BLER0       EVSE_1 - BT1 BLER1
                                                                     EVSE_2 - BT0 BLER0       EVSE_2 - BT1 BLER1                           5.E-03
                                        440
                                                                     EVSE_3 - BT0 BLER0       EVSE_3 - BT1 BLER1
                                        420                          EVSE_4 - BT0 BLER0       EVSE_4 - BT1 BLER1                      0.E+00
                                                                                                                                                                400 420 440 460 480 500 520 540 560 580 600 620 640 660 680 700
Power (kW)

                                        400                                                                                                                                             Time (s)
                                        380                                                                                          Congestion indexes calculated by each agent:
                                        360                                                                                                              1.6
                                                                                                                                                        1.55
                                        340                                                                                                              1.5
                                        320                                                                                                             1.45

                                                                                                                                     Congestion Index
                                                                                                                                                         1.4
                                        300                                                                                                             1.35
                                        280                                                                                                              1.3                                             EVSE_1 - BT0 BLER0
                                                                                                                                                        1.25                                             EVSE_2 - BT0 BLER0
                                              400 420 440 460 480 500 520 540 560 580 600 620 640 660 680 700                                            1.2                                             EVSE_3 - BT0 BLER0
                                                                                                                                                                                                         EVSE_4 - BT0 BLER0
                                                                          Time (s)                                                                      1.15                                             EVSE_1 - BT1 BLER1
                                                                                                                                                         1.1                                             EVSE_2 - BT1 BLER1
                                                                                                                                                        1.05                                             EVSE_3 - BT1 BLER1
                                                                                                                                                                                                         EVSE_4 - BT1 BLER1
                                                                                                                                                           1
                                                                                                                                                               400 420 440 460 480 500 520 540 560 580 600 620 640 660 680 700
                                                                                                                                                                                          Time (s)
Current values (in p.u. of the maximum operating
                                          Test case results                                              ∆t = 3 s                       current) measured by the IEDs associated to the first
                                                                                                                                        branch of the two considered feeders:
                                                                                                                                                                                                           feeder 1 (EVSE_1, EVSE_2) - BT0 BLER0
                                         Number of charging EVs in each cluster:                                                                    1.014
                                                                                                                                                                                                           feeder 1 (EVSE_1, EVSE_2) - BT1 BLER1
                                                                                                                                                    1.012
                                                                                                                                                                                                           feeder 2 (EVSE_3, EVSE_4) - BT0 BLER0
                                    10                                                                                                               1.01
N° of Electric Vehicles connected

                                                                                                                                                    1.008                                                  feeder 2 (EVSE_3, EVSE_4) - BT1 BLER1
                                     9                                                                                                              1.006

                                                                                                                                   Current (p.u.)
                                                                                                                                                    1.004
                                     8
                                                                                                                                                    1.002
                                                                                      EVSE_1                                                            1
                                     7
                                                                                      EVSE_2                                                        0.998
                                     6                                                EVSE_3                                                        0.996
                                                                                      EVSE_4                                                        0.994
                                     5                                                                                                              0.992
                                                                                                                                                     0.99
                                     4
                                                                                                                                                                         400 420 440 460 480 500 520 540 560 580 600 620 640 660 680 700
                                     3                                                                                                                                                                Time (s)
                                         400 420 440 460 480 500 520 540 560 580 600 620 640 660 680 700
                                                                       Time (s)                                                         Congestion index variations calculated by the IEDs:
                                          Power requested by each cluster:                                                                                                                            feeder 1 (EVSE_1, EVSE_2) - BT0 BLER0
                                                                                                                                                    8.E-02
                                                                                                                                                                                                      feeder 1 (EVSE_1, EVSE_2) - BT1 BLER1
                                                                                                                                                                                                      feeder 2 (EVSE_3, EVSE_4) - BT0 BLER0
                                                                                                                                                    6.E-02                                            feeder 2 (EVSE_3, EVSE_4) - BT1 BLER1

                                                                                                                                  ∆pr
                                                                                                                                                    4.E-02

                                                                                                                                                    2.E-02

                                                                                                                                                    0.E+00
                                                                                                                                                                             400 420 440 460 480 500 520 540 560 580 600 620 640 660 680 700
                                                                                                                                                                                                      Time (s)
                                                                                                                                                    Congestion indexes calculated by each agent:
                                                                                                                                                                       1.6
                                                                                                                     Number of
                                                   Time         Time        I1 max     I2 max    Packet delay (ms)
                            BT BLER                                                                                  packets TX
                                                 I1>1pu (s)   I2>1pu (s)     (p.u.)     (p.u.)     mean (stdev)                                                        1.5
                                                                                                                        RX
                                     BT0
                                                                                                                        378                                            1.4
                                    BLER0           93           79        1.0109     1.0143       142.6 (10.0)
                                                                                                                                                    Congestion Index
                                    ∆t = 1 s                                                                            378
                                     BT1                                                                                                                               1.3                                                  EVSE_1 - BT0 BLER0
                                                                                                                        406                                                                                                 EVSE_2 - BT0 BLER0
                                    BLER1          101           81        1.0113     1.0147      231.3 (189.0)                                                                                                             EVSE_3 - BT0 BLER0
                                    ∆t = 1 s                                                                            363                                            1.2                                                  EVSE_4 - BT0 BLER0
                                     BT0                                                                                                                                                                                    EVSE_1 - BT1 BLER1
                                                                                                      149.7             122
                                    BLER0           71           69        1.0107     1.0149                                                                           1.1                                                  EVSE_2 - BT1 BLER1
                                    ∆t = 3 s                                                          (12.7)            122                                                                                                 EVSE_3 - BT1 BLER1
                                     BT1                                                                                                                                                                                    EVSE_4 - BT1 BLER1
                                                                                                      235.3             128                                             1
                                    BLER1           81           69        1.0107     1.0149                                                                                 400 420 440 460 480 500 520 540 560 580 600 620 640 660 680 700
                                    ∆t = 3 s                                                         (180.5)            120
                                                                                                                                                                                                         Time (s)
Current values (in p.u. of the maximum operating
                                                      Test case results                                                                    current) measured by the IEDs associated to the first
                                                                                                                                           branch of the two considered feeders:
                                                      Number of charging EVs in each cluster:                                              1.02
                                         10                                                                                           1.015
             N° of Electric Vehicles connected

                                                                                                                                           1.01
                                                 9                                                                                    1.005

                                                                                                                       Current (pu)
                                                                                                                                              1
                                                 8                                                                                    0.995
                                                                                                     EVSE_1
                                                                                                                                           0.99
                                                                                                     EVSE_2                                                                                          feeder 1 (EVSE_1, EVSE_2)
                                                                                                                                      0.985
                                                 7                                                   EVSE_3                                                                                          feeder 2 (EVSE_3, EVSE_4)
                                                                                                                                           0.98
                                                                                                     EVSE_4
                                                                                                                                      0.975
                                                 6                                                                                         0.97
                                                                                                                                      0.965
                                                 5                                                                                                400 420 440 460 480 500 520 540 560 580 600 620 640 660 680 700
                                                     400 420 440 460 480 500 520 540 560 580 600 620 640 660 680 700                                                                    Time (s)
                                                                                 Time (s)
                                                                                                                                           Congestion index variations calculated by the IEDs:
                                                      Power requested by each cluster:                                                      5.0E-05                                                   feeder 1 (EVSE_1, EVSE_2)
             460                                                                                                                            4.5E-05                                                   feeder 2 (EVSE_3, EVSE_4)
             440                                                                                                                            4.0E-05
                                                                                                                                            3.5E-05
             420
                                                                                                                                            3.0E-05
             400                                                                                                                            2.5E-05
             380

                                                                                                                        ∆pr
                                                                                                                                            2.0E-05
Power (kW)

             360                                                                                                                            1.5E-05
             340                                                                                      EVSE_1                                1.0E-05
                                                                                                                                            5.0E-06
             320                                                                                      EVSE_2
                                                                                                                                           0.0E+00
             300                                                                                      EVSE_3                               -5.0E-06
             280                                                                                      EVSE_4                               -1.0E-05
             260                                                                                                                           -1.5E-05
                                                                                                                                                      400 420 440 460 480 500 520 540 560 580 600 620 640 660 680 700
             240                                                                                                                                                                          Time (s)
                                                 400 420 440 460 480 500 520 540 560 580 600 620 640 660 680 700
                                                                                   Time (s)                                                  Congestion indexes calculated by each agent:
                                                                                                                                            1.3
                                                                                                                                           1.28
                                                                                                                                                            feeder 1 (EVSE_1, EVSE_2)
                                                                                                                                           1.26
                                                                                                                                           1.24             feeder 2 (EVSE_3, EVSE_4)
                                                                                                                                           1.22
                                                                                                                        Congestion Index    1.2
                                                                                                                                           1.18
                                                                                                                                           1.16
                                                                                                                                           1.14
                                                                                                                                           1.12
                                                                                                                                            1.1
                                                                                                                                           1.08
                                                                                                                                           1.06
                                                                                                                                           1.04
                                                                                                                                           1.02
                                                                                                                                              1
                                                                                                                                                  400 420 440 460 480 500 520 540 560 580 600 620 640 660 680 700
                                                                                                                                                                                    Time (s)
Analysis of the power flow profiles

Ideal congestion management strategy

 Electric vehicles drivers can behave basically in two different ways
 - book the EVSE for the minimum time required to get the battery fully
 recharged assuming to get the maximum power (e.g. a driver in a
 hurry);
 - book the EVSE for a long time (some hours) to enable slow recharge
 when the demand is high (e.g. a driver that parks the car close to his or
 her workplace).
                                                          What if EVs are
                                                          considered as energy
                                                          sources as well?
             E2SG INTERNAL/CONFIDENTIAL   Copyright @ E2SG Consortium      www.e2sg-project.eu   p. 44
Analysis of the power flow profiles

Ideal congestion management strategy

 Allocation of power cuts among all the EVSE fed by the same GCP

 - maximize the number of vehicles fully recharged;
 - maximize the energy given to each vehicle connected to an EVSE.

            E2SG INTERNAL/CONFIDENTIAL   Copyright @ E2SG Consortium   www.e2sg-project.eu   p. 45
Analysis of the power flow profiles

  Power load profile in a typical weekday

           E2SG INTERNAL/CONFIDENTIAL   Copyright @ E2SG Consortium   www.e2sg-project.eu   p. 46
Analysis of the power flow profiles

 Analysis of the occupancy of charging stations
                                         60
  average power absorbed by each EVSE

                                         50

                                         40                                                                                                                                                                  Average power absorbed by each
                                                                                                                                                                                                             EVSE downstream to IED 1
                (in kW)

                                         30

                                         20
                                                                                                                                                                                                             around 6 PM
                                         10

                                                0
                                                                       1   2   3       4       5       6       7       8       9       10        11        12    13    14    15    16    17   18   19   20
                                                                                                                            number of occupied EVSEs

                                                                      60
                                average power absorbed by each EVSE

                                                                      50

                                                                      40
                                                                                                                                                                                                             Average power absorbed by
                                                                                                                                                                                                             each EVSE downstream to IED
                                              (in kw)

                                                                      30

                                                                                                                                                                                                             1 around 10 AM
                                                                      20

                                                                      10

                                                                       0
                                                                           1   2   3       4       5       6       7       8       9        10        11    12    13    14    15    16   17   18   19   20
                                                                                                                           number of occupied EVSEs

                                                                                           E2SG INTERNAL/CONFIDENTIAL                                                       Copyright @ E2SG Consortium               www.e2sg-project.eu   p. 47
Analysis of the power flow profiles

  Profile of vehicle traffic during the day

                                          8

                                          7
     Average number of running vehicles

                                          6
      (percentage of the total number)

                                          5

                                          4

                                          3

                                          2

                                          1

                                          0
                                              12:00 1:00 2:00 3:00 4:00 5:00 6:00 7:00 8:00 9:00 10:00 11:00 12:00 1:00 2:00 3:00 4:00 5:00 6:00 7:00 8:00 9:00 10:00 11:00
                                               AM AM AM AM AM AM AM AM AM AM AM AM PM PM PM PM PM PM PM PM PM PM PM PM
                                                                                                   hour of the day

                                                     E2SG INTERNAL/CONFIDENTIAL                Copyright @ E2SG Consortium                              www.e2sg-project.eu   p. 48
Analysis of the power flow profiles

  Portion of a simulation run showing the average power
  absorbed by the EVSEs downstream to IED 2 and the
  number of occupied EVSEs
                            5                                                                 50

                            4                                                                 40
                of EVSEs

                                                                                                           (Kw)
                            3                                                                 30

                                                                                                         (kW)
             # EVSE

                                                                                                    Power
                                                                                                   Power
         Number

                            2                                                                 20

                            1                                                                 10

                           0                                                                 0
                           16:00                   16:30                      17:00      17:30
                                                                 Hour
                                        Occupied EVSEs                  Average Power

                           E2SG INTERNAL/CONFIDENTIAL      Copyright @ E2SG Consortium   www.e2sg-project.eu      p. 49
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