The Application of Access G3-PLC in Smart Metering

Systems in Germany Dr.-Ing. Anıl Mengi

devolo AG / G3-PLC Representative

devolo AG, Aachen

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Smart Metering G3-PLC Scenario in Germany

Smart-Metering-System

on BKE Adapter-Plate

Selective rollout of 43 Mio. meters with focus on Data Privacy and Security

WAN

Interface

Coordinator

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● G3-PLC with FCC above Cenelec 150-500 kHz application

● Long range with longest transmission distance 1.7 km

● High data rates compared to the G3-PLC Cenelec band application

● Robust against the switching noises caused by the PV solar devices.

● Bi-directional end-to-end IP connection, end-to-end security

● IPv4 and IPv6 are supported (integration of existing subnets with IPv4)

● Layer 2 Access Protection

Smart Metering G3-PLC Scenario in Germany

Germany’s WAN Interface with G3-PLC

ITU G.9903 or G3-PLC

XML for COSEM Objects

IPv6 (v4)

MAC 802.15-4 based Standardized at ITU-T

OFDM modulation Standardized at ITU

6loWPAN Standardized at ITU-T

RESTful COSEM

Webservices

Cryptographic Message

Syntax (CMS)

DLMS/COSEM

OBIS

TCP

Transport Layer Security

HTTP

Application

Transport

Network

MAC Access to media

PHY Physical Layer

Adaptation

(OSI Layers)

Session

Meter data 1 Register: 2 Bytes

XML: 1.431 Kbytes

XML Compressed: 566 Bytes

1.316 KBytes

2.004 KBytes

2.065 KBytes

Total: 2.145 Kbytes

large amount of overhead

Germany WAN Interface Use Cases

defined by FNN (VDE) Working Group

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FNN Fälle Phase 3 Users A B C D

Readings Not frequently

(monthly)

Daily profile Not frequently

(monthly)

Frequently

(15 min.)

Remote

Switching

no no Yes, not critical Yes, critical

Busy Hour Data Volume in a G3-PLC Network

Example: 200 G3-PLC modems in a network

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Traffic in the Busy Hour

• 343 Data Communication

• 680 KB in Downlink

• 689 KB in Uplink

Group A

Less frequent meter reading

No remote switching

Group B

Frequent meter reading

No remote switching

Group C

less frequent meter reading

Remote switching

Group D

Frequent meter reading

Remote switching

125 G3-PLC Modems 50 G3-PLC Modems

50 G3-PLC Modems 25 G3-PLC Modems

Validation of the G3-PLC Network with all use cases is crucial!

G3-PLC Network Trial Sites

devolo / Vattenfall Metering Hamburg / Vattenfall Metering Berlin

März – August 2015 ~1000 G3 PLC Modems were installed.

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Berlin Ullsteinhaus Berlin City West

Hamburg Phoenix Center

Hamburg Europapassage

Hamburg Alstertal Einkaufszentrum

G3-PLC Modem Field trial Setup

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TLS

Test 1: Reachability of the PAN-Client-Modems

Each PAN-Client-Modem sends a cyclic Keep-Alive-Message to the PAN Coordinator

Test 2: Typical data volumes are transfered to measure the data rates of each connection.

a) 5kByte up/down-link b) 500kByte downlink

Test 3: All FNN use cases are tested in a network structure for a long period of time

G3-PLC Modem Field Trial Berlin Ullsteinhaus

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PAN -

Coordinator

Netz-Trafo 1

Test

Computer Netz-Trafo 2

PAN -

Coordinator

Netz-Trafo 3

PAN -

Coordinator

PAN -

Client

PAN -

Client

PAN -

Client

"Netz 1"

"Netz 2"

"Netz 3" Test

Computer

154 G3-PLC

Modems

G3-PLC Modem Feldtest Berlin Ullsteinhaus

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Test 1: Reachability of the PAN-Client-Modems

Each PAN-Client-Modem sends a cyclic Keep-Alive-Message to the PAN Coordinator

Start: 11.05.15 16:00Uhr

End: 12.05.15 08:30 Uhr

>98% of Reachability Success Rate at all the test areas during the field trial

Nodes

Success R

ate

G3-PLC Modem Feldtest Berlin Ullsteinhaus

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Test 2: Typical data volumes are transfered to measure the data rates of each connection.

5kByte up/down-link

Start: 15.07.15

End: 16.07.15

500kByte downlink

Start: 10.07.15

End: 13.07.15

G3-PLC Modem Field Trial Berlin Ullsteinhaus

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Tes 2: 500kByte downlink

Start: 10.07.15 22:00 Uhr

End: 13.07.15 08:00 Uhr

Average data rates are around 40 kbit/s at the application layer

Due to the scheduler task distribution

G3-PLC Modem Field trial Berlin Ullsteinhaus

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Beginn: 03.06.15 18:00 Uhr

Ende: 06.06.15 12:00 Uhr

84

86

88

90

92

94

96

98

100

86 88 90 92 94 96 98 100

Erf

olg

sq

uo

te [

%]

Nodes [%]

Cumulative success rates

% 88 Average Success Rate of executing all the use cases in the first round

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Optimal network coverage in practice - without using repeaters

Optimal Range by lower frequency band (150-500 kHz)

Fulfilling the Bandwidth Requirements for Smart Grid Applications

Performance reserves for future requirements

Technology principle "cover and provide bandwidth“

Designed by the international open standard ITU-T G.9903

Integrated smart meters with G3-PLC are available

Conclusion: Advantages of G3-PLC Technology

Vielen Dank!