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  • EVS28KINTEX, Korea, May 3-6, 2015

    Coexistence test between HS-PLC and HPGP in Korea AMI-EVSE

    Changun Park, Jae-Jo Lee, Hui-Myoung OhPower Telecommunication Research Center, Korea Electrotechnology Research Institute (KERI)

    1271-19 Sa-dong, Sangnok-gu, Ansan-si, Gyeonggi-do, REPUBLIC OF KOREA{pcuzone, jjlee. hmoh}@keri.re.kr

  • Abstract

    Abattery-charged Electric Vehicle(EV) such as Plug-in Electric Vehicles(PEV) and Plug-in Hybrid Electric Vehicles(PHEV) has been developing fast due to energy efficiency andenvironmental problems. To commercialize these PEVs, an Electric Vehicle ChargingStation(EVSE) should be installed completely. An international standards organization,ISO/IEC has selected the HomePlug Green PHY(HPGP) technology as acommunication technology for an EVSE, and is pushing to standardize the ISO/IEC15118 Vehicle to grid communication interface. The Korea Electric PowerCorporation(KEPCO) has selected the ISO/IEC 12139-1 High Speed Power LineCommunication(HS-PLC) as Advanced Metering Infrastructure(AMI). HS-PLC andHPGP have an interference problem because of the use of the same frequency band. Inthis paper, we tested the coexistence between HS-PLC and HPGP in Korea AMI-EVSE.HS-PLC signal is coupled to the Main line. HPGP signal is coupled to the ControlPilot(CP) line, in order to enable bidirectional HPGP communications between oneElectric Vehicle Supply Equipment(EVSE) and one EV. The interference problemsbetween HS-PLC and HPGP are observed through the Coexistence test. Also, weanalyze the system stability effects of the KoreaAMI and the EVSE.

    2Keyword:ISO/IEC12139-1,PowerLineCommunication,Coexistence,HomePlugGreenPHY,ElectricVehicleChargingStation

  • INTERODUCTION

    With rising oil prices and threatening environmental problems, developed countries arestriving to develop electric vehicles as replacements for existing vehicles with internalcombustion engines. The replacements aim to reduce environmental pollutant emissionsand to boost energy efficiency. According to their electric energy use ratio, EVs aredivided into Abattery-charged EV(Electric Vehicle), HEV(Hybrid EV), and PHEV(Plug-in Hybrid EV). To enable diverse EVs to successfully make a safe landing on theglobalautomobilemarket, EVcharging infrastructures shouldbeperfectly installed[1].Furthermore, to stabilize EV charging and support diverse value-added services,communication equipment between EVs and Electric Vehicle Supply Equipment(EVSE)are important, and ISO/IEC have selected PLC(Power Line Communication)technology as an EV communication technology, and are pushing to standardizethe vehicle-to-grid communication interface (ISO/IEC 15118) [2].

    3

    AC electric Vehicle Charging System

    DC electric Vehicle Charging System

    PLC PLC

    Low Voltage Power Line

    AC Power DC Power

  • AMR(Automatic Meter Reading), is the technology of automatically collectingconsumption, diagnostic, and status data from smart meter(energy metering devices) andtransferring that data to a central database for billing, troubleshooting, and analyzing.KEPCO(Korea Electric Power Company) started massive installation of smartmeter with PLC module of ISO/IEC 12139-1 High-Speed PowerLine Communication(HS-PLC) in2010. Nationwide smart meter installation will be completed by 2020. (19Mhouseholds). KEPCO is expanding the AMI(Advanced Metering Infrastructure)based on theAMR network.

    INTERODUCTION

    4

    Access Network (PLC, HFC)AMR SystemDB ServerFEP

    DCUSmart Meter

    PLC AMI: Advanced Metering Infrastructure

    DCU: Data Concentration Unit

    FEP: Front End Processor

    HFC: Hybrid Fiber Coaxial

    Low Voltage Power Line

    Water Meter

    Gas Meter

  • INTERODUCTION

    ISO/IEC 15118-3 describes PLC technology of HPGP on control pilot linebetween EV and EVSE(Electric Vehicle Supply Equipment). HPGP uses the1.8MHz to 30MHz frequency band. KEPCO adopted HS-PLC on main line todeploy AMR. HS-PLC uses the 2.15MHz to 23.15MHz frequency band. HS-PLC and HPGP have an interference problem because of the use of thesame frequency band.In this paper, we tested the coexistence between HS-PLC and HPGP inKorea AMI-EVSE. HS-PLC signal is coupled to the Main line. HPGP signalis coupled to the Control Pilot(CP) line, in order to enable bidirectional HPGPcommunications between one Electric Vehicle Supply Equipment(EVSE) andone EV. The interference problems between HS-PLC and HPGP areobserved through the Coexistence test. Also, we analyze the systemstability effects of the Korea AMI and the EVSE.

    5

  • OVERVIEW OF EV CHARGING SYSTEM

    I. EV Charging System AC Electric Vehicle Charging Station

    AC -AC: below 1,000V standard AC supply voltages DC Electric Vehicle Charging Station

    AC - DC: below 1,500V DC voltages

    6

    IEC 61851 Electric vehicle conductive

    charging system[3]

    AC electric vehicle charging station DC electric vehicle charging station

    Operating system

    AC Power

    AC Power

    AC earth leakage breaker

    Electric Vehicle

    DC earth leakage breaker AC earth leakage breaker

    Rectifier Isolation transformer

    Inverter Converter

    On-Board Charger

    Battery

  • OVERVIEW OF EV CHARGING SYSTEM

    7

    Type 1 Type 1-Combo Type 2 Type 2-Combo Type CN AC Type CN DC

    Type 1 CHAdeMO

    Type 2

    Type 2-ComboType 1-Combo

    Type 1

    CHAdeMOPower Line CommunicationControl Area Network-CHAdeMO

    IEC 62196Plugs, socket-outlets, vehicle

    connectors and vehicle inlets Conductive

    charging of electric vehicles[4]

  • OVERVIEW OF EV CHARGING SYSTEM

    II. Vehicle to grid communication interfaceISO/IEC 15118 specifies the communication between Electric Vehicles (EV),including Battery Electric Vehicles and Plug-In Hybrid Electric Vehicles, and the ElectricVehicle Supply Equipment (EVSE). As the communication parts of this genericequipment are the Electric Vehicle Communication Controller (EVCC) and the SupplyEquipment Communication Controller (SECC).

    8

    Primary actors Secondary actors

  • ISO/IEC 15118 consists of the following parts, under the general title Road vehicles Vehicle to grid communication interface:

    OVERVIEW OF EV CHARGING SYSTEM

    9

    OSI Layer 1Physical

    OSI Layer 2Data Link

    OSI Layer 3 IP, ICMP, SLAACNetwork

    OSI Layer 4 TCP, UDP, TLSTransport

    OSI Layer 5 V2GTPSession

    OSI Layer 6 EXIPresentation

    OSI Layer 7 Application Layer MessageApplication SDP

    Part 3: Physical layer and Data Link Layer requirements

    V2G Standardized Service Primitive Interface

    Part 2: Network and application protocol requirements

    Part 1: General information and use-case definition

    This part of ISO 15118 specifies terms and definitions, generalrequirementsandusecasesasthebasis for theotherpartsofISO15118. It provides a general overview and a commonunderstanding of aspects influencing the charge process,paymentandloadleveling.

    This part of ISO 15118 specifies the communication betweenBEV or PHEV and the EVSE. The application layer messageset defined in this part of ISO 15118 is designed to support theenergytransferfromanEVSEtoanEV.

    This part of ISO 15118 specifies the requirements of thephysicalanddatalinklayerforahigh-levelcommunication,directly between BEV or PHEV based on a wiredcommunication technology and the EVSE used in addition tothebasicsignaling.

  • OVERVIEW OF EV CHARGING SYSTEM

    ISO/IEC 15118-3 is organized along architectural lines, emphasizing the large-scale separation of the system into two parts(MAC and Physical layer) and covering both AC and DC use-cases[5].

    10

    OSI Layer 1Physical

    OSI Layer 2Data Link Part 3: Physical layer and

    Data Link Layer requirements

    Control Pilot(IEC 61851-1)Hardware I/Os

    Control Pilot Line

    Connection coordinationHPGP HPGP

    Control Pilot Line

    Earth

    L and RDamp associated with capacitors form low pass filters.

    Signal coupling

    Beside the communication related stack on theControl Pilot, a Hardware Control Path on theright provides triggering and signaling means forIEC61851-1relatedsignaling.

    Annex A(normative) HomePlug Green PHY on Control Pilot line

  • OVERVIEW OF EV CHARGING SYSTEM

    III. AMI in KoreaKEPCO has developed a remote supervisory program for communicationnetworks (including optical fiber, wireless, and PLC network) and a remotesetting program that automatically interfaces between communication devicesand AMI devices such as the data concentrate unit (DCU) and smart meters[1].Nationwide smart meter installation will be completed by 2020.

    11

    Data Concentration Unit(DCU)

    Registration and Management : Digital meters of Premises

    Collect power consumption from Digital meters

    Transfer collected data to Meter Reading Center

    HS-PLCModule

    Smart Meter Provides power consumption and power information

    (valid/invalid power level, power rate with time, etc ) Remote inspection with the built-in PAU Power utility AMR Unit(PAU) Removable HS-PLC Module for G-Type Digital Meter

  • OVERVIEW OF EV CHARGING SYSTEM

    IV. Power Line Communication

    ISO/IEC 12139-1 HS-PLC HomePlug GPOrganization for Standardization ISO/IEC 12139-1 IEEE 1901

    Frequency Bandwidth 2.15 ~ 23.15MHz ( Broadband ) 2 ~ 30MHz ( Broadband )Modulation Technology DPSK-based DMT QPSK (ROBO Mode)

    Payload speed at physical layer 24Mbps 3.8Mbps, 4.9Mbps, 9.8MbpsApplication field Smart Grid, Home Network Smart Grid

    HS-PLCandHPGPhavean interference problem because of the use of the same freq

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