evs28(coexistence test between hs-plc and hpgp in korea ...coexistence test... · coexistence test...

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].

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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

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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.

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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

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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


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]


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).

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Primary actors Secondary actors

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


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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.


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].

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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


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.

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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


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 frequency band.

AC electric vehicle charging station DC electric vehicle charging station

On-Board Charger

Battery

Data Concentration Unit DB Server AMR System Data Concentration Unit Smart MeterSmart Meter

Interference The HPGP signal is coupled to Main lines

COEXISTENCE TEST

I. Coexistence Lab TestsTest Environment

• HS-PLC signal is coupled to the Main line and the distance between DCU and Smart Meter is 5Meter. HPGP signal is coupled to the Control Pilot(CP) line and the distance between EVSE and EV is 5Meter.

• Datarate measurement with Jperf-Tool• Measurement of the amplitude with Oscilloscope • Measurement of the output power(dBm/Hz) with spectrum analyzer

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Meter EVEVSEDCU

PS-PLCModem

HPGPModem

HS-PLC Modem

HPGPModem

HPGP PLC Signal Injection into

Control Pilot and Earth.

ISO/IEC 12139-1 PLC Signal Injection into L1and N.

COEXISTENCE TEST

Test1-1. Control measurements of ISO/IEC 12139-1 without HomePlug GP, HomePlug GP modems are not connected. (TCP)

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Meter EVEVSEDCU

PS-PLCModem

HPGPModem

HS-PLC Modem

HPGPModem




Datarate measurement with Jperf-Tool- Result: Datarate with TCP is 7.4Mbit/sec

Measurement of the amplitude of PLC (Oszi)- Result: The amplitude is about +/- 600mV

Measurement of the output power (dBm/Hz) with spectrum analyzer- Result: The PSD is about -78dBm/Hz

COEXISTENCE TEST

Test1-2. Control measurements of HomePlug GP without ISO/IEC 12139-1, ISO/IEC 12139-1 modems are not connected. (TCP)

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Meter EVEVSEDCU

PS-PLCModem

HPGPModem

HS-PLC Modem

HPGPModem




Measurement of the output power (dBm/Hz) with spectrum analyzer- Result: The PSD is about -55dBm/Hz- Result: The PSD is about -75dBm/Hz

Datarate measurement with Jperf-Tool- Result: Datarate with TCP is 4.4Mbit/sec

Measurement of the amplitude of PLC (Oszi)- Result: The amplitude is about +/- 5V- Result: The amplitude is about +/- 600mV

COEXISTENCE TEST

Test2. Measurement of both technologies in parallel, with maximum bandwidth (TCP, AC-case)

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Meter EVEVSEDCU

PS-PLCModem

HPGPModem

HS-PLC Modem

HPGPModem




with HPGP(-55dBm/Hz), measurement of the datarates at both networksResult:- ISO/IEC 12139-1(-78dBm/Hz) the datarate decrease from 7.4 to 2.6 Mbit/sec (decrease 64.9%)- HPGP (-55dBm/Hz) the datarate decrease from 4.4 to 3.7 Mbit/sec (decrease 15.9%)- The influence to each other is obvious.

with HPGP(-75dBm/Hz) , measurement of the datarates at both networksResult: - ISO/IEC 12139-1(-78dBm/Hz) the datarate decrease from 7.4 to 6 Mbit/sec (decrease 18.9%)- HPGP (-75dBm/Hz) the datarate decrease from 4.4 to 4 Mbit/sec (decrease 9.1%)- The influence to each other is noticeable.

COEXISTENCE TEST

Test3. Measurement of both technologies in parallel, with maximum bandwidth (UDP, AC-case)

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Meter EVEVSEDCU

PS-PLCModem

HPGPModem

HS-PLC Modem

HPGPModem




with HPGP(-75dBm/Hz), measurement of the datarates at both networksResult:- ISO/IEC 12139-1(-60dBm/Hz) the datarate decrease from 6.9 to 6.8 Mbit/sec(packet size: 1400byte)- HPGP (-75dBm/Hz) the datarate decrease from 5.7 to 5 Mbit/sec(packet size: 1400byte- The influence between ISO12139 and HPGP is negligible. In difference on HPGP side depend on the packet sizes.

with HPGP(- 55dBm/Hz) , measurement of the datarates at both networksResult: - ISO/IEC 12139-1(-78dBm/Hz) the datarate decrease from 6.9 to 2.7 Mbit/sec(packet size: 1400byte) HPGP (-

55dBm/Hz) the datarate decrease from 4.4 to Mbit/sec(packet size: 1400byte) - The influence between ISO/IEC 12139-1 and HPGP is significant. In difference on- HPGP side depend on the packet sizes

COEXISTENCE TEST

II. Automatic Meter Reading TestsTest Environment

• AMR Server: 1EA • DCU: 1EA• Smart Meter(3P4W): 2EA• Smart Meter(1P2W): 161EA

• DC EVSE: 1EA• AC EVSE: 1EA• EV: 1EA• EV Emulator: 1EA

RSTN

Meterwith HS-PLC

DC EVSEwith HPGP

EVwith HPGP

Meterwith HS-PLC

AC EVSEwith HPGP

EV Emulatorwith HPGP

Meterwith HS-PLC

Meterwith HS-PLC

Meterwith HS-PLC

Meterwith HS-PLC

Meterwith HS-PLC

Meterwith HS-PLC

Meterwith HS-PLC

Meterwith HS-PLC

Meterwith HS-PLC

Meterwith HS-PLC

Meterwith HS-PLC

Meterwith HS-PLC

DCU

AMR Server

Eth

erne

t

HS-PLC Signal Injection into

L1, L2, L3 and N.

Test1. Reference AMR Test without DC/AC EVSE-EV,HomePlug GP modems are not connected.

COEXISTENCE TEST

RSTN

Meterwith HS-PLC

DC EVSEwith HPGP

EVwith HPGP

Meterwith HS-PLC

AC EVSEwith HPGP


Meterwith HS-PLC

Meterwith HS-PLC

Meterwith HS-PLC

Meterwith HS-PLC

Meterwith HS-PLC

Meterwith HS-PLC

Meterwith HS-PLC

Meterwith HS-PLC

Meterwith HS-PLC

Meterwith HS-PLC

Meterwith HS-PLC

Meterwith HS-PLC

DCU


L1, L2, L3 and N.

Eth

erne

tTest Time 17 - 18 18 -19 19 - 20 20 - 21 21 - 22 22 - 23

Total Meter Reading 100% 100% 100% 100% 100% 100%

R 100% 100% 100% 100% 100% 100%

S 100% 100% 100% 100% 100% 100%

T 100% 100% 100% 100% 100% 100%

AMR Server

Test2. AMR Test with DC EVSE-EV,AC EVSE-EV is not connected.

COEXISTENCE TEST

RSTN

Meterwith HS-PLC

DC EVSEwith HPGP

EVwith HPGP

Meterwith HS-PLC

AC EVSEwith HPGP


Meterwith HS-PLC

Meterwith HS-PLC

Meterwith HS-PLC

Meterwith HS-PLC

Meterwith HS-PLC

Meterwith HS-PLC

Meterwith HS-PLC

Meterwith HS-PLC

Meterwith HS-PLC

Meterwith HS-PLC

Meterwith HS-PLC

Meterwith HS-PLC

DCU

Eth

erne

t


L1, L2, L3 and N.

AMR Server

Test Time 17 - 18 18 -19 19 - 20 20 - 21 21 - 22 22 - 23

Total Meter Reading 99.3% 99.4% 99.9% 99.9% 99.8% 99.7%

R 100% 98.3% 99.6% 99.6% 100% 99.6%

S 100% 100% 100% 100% 100% 100%

T 97.2% 100% 100% 100% 99.4% 99.4%

DC EVSE Meter ID: 5344085581 100% 100% 100% 100% 100% 100%

Test3. AMR Test with AC EVSE-EV,DC EVSE-EV is not connected.

COEXISTENCE TEST

RSTN

Meterwith HS-PLC

DC EVSEwith HPGP

EVwith HPGP

Meterwith HS-PLC

AC EVSEwith HPGP


Meterwith HS-PLC

Meterwith HS-PLC

Meterwith HS-PLC

Meterwith HS-PLC

Meterwith HS-PLC

Meterwith HS-PLC

Meterwith HS-PLC

Meterwith HS-PLC

Meterwith HS-PLC

Meterwith HS-PLC

Meterwith HS-PLC

Meterwith HS-PLC

DCU

Eth

erne

t


L1, L2, L3 and N.

AMR Server

Test Time 17 - 18 18 -19 19 - 20 20 - 21 21 - 22 22 - 23

Total Meter Reading 99.2% 100% 100% 99.54% 98.6% 98.4%

R 100% 100% 100% 99.2% 97.0% 97.9%

S 99.6% 100% 100% 100% 100% 100%

T 97.8% 100% 100% 99.4% 98.9% 97.2%

AC EVSE Meter ID: 21340658039 100% 100% 100% 50% 75% 100%

CONCLUSION

In this paper, we studied the ISO/IEC 15118 standards to define PLC technology betweenEVSE and EV and analyzed the AMI system structure in Korea. We tested thecoexistence between HS-PLC and HPGP in order to validation of each systems, Ifthe EVSE is connected with the AMI system. In this experiment, HS-PLC signal iscoupled to the Main line, in order to enable bidirectional HS-PLC communicationsbetween AMI(or DCU) and smart meters. HPGPsignal is coupled to the Control Pilot(CP)line, in order to enable bidirectional HPGPcommunications between EVSE and EV.The interference problems between HS-PLC and HPGP are observed through thecoexistence test. When Power Spectrum Density of HPGP is –55dBm/Hz and -75dBm/Hz, HS-PLC data rate is decreased 64.9% and 18.9% in Coexistence Lab Tests.In the case of DC EVSE-EV, the EVSE with HPGP is not connected directly to the grid.The meter reading rate shows 100% and the signal of HPGP is not visible to Main lines.In the case of AC EVSE-EV, the EVSE with HPGP is connected directly to the grid. Themeter reading rate decreased to 50% and the signal of HPGP is visible to Main lines inAutomatic Meter Reading Tests. The interference problems between HS-PLC andHPGP are observed through the Coexistence Lab Tests and Automatic MeterReading Tests.

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TEST IMAGES

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Coexistence Lab Tests

Automatic Meter Reading Tests

REFERENCES

[1] Chang-Un Park, Jae-Jo Lee, Sang-Ki Oh, Jung-Mok Bae, Jong-Kwan Seo, "Study and field test of power line communication for an electric-vehicle charging system", Power Line Communications and Its Applications (ISPLC), 2012 16th IEEE International Symposium on,2012,pp.344-349.

[2] ISO, “Road vehicles --Vehicle to grid communication interface -- Part 1: General information and use-case definition”, ISO 15118-1 ed1.0

[3] IEC, “Electric vehicle conductive charging system - Part 1: General requirements”, IEC 61851-1 ed2.0

[4] IEC, “Plugs, socket-outlets, vehicle connectors and vehicle inlets - Conductive charging of electric vehicles - Part 1: General requirements”, IEC 62196-1 ed3.0

[5] ISO, “Road Vehicles -Vehicle to grid communication interface - Part 3: Physical layer and Data Link layer requirements”, ISO 15118-3 ec1.0 .

[6] S. Galli, “A Simplified Model for the Indoor Power Line Channel,” in Proc. IEEE Int. Symp. Power Line Commun. And its App., Apr. 2009, pp.13-19.

[7] T. Huch, J. Schirmer, and K. Dostert, “Tutorial about the implementation of a vehicular high speed communication system,” in proc. IEEE Int. Symp. Power Line Commun. And its App., Apr. 2005, pp. 162–166.

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evs28(coexistence test between hs-plc and hpgp in korea ...coexistence test... · coexistence test...

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