katsuyuki kariya † , tatsuya nakamura † , shinji takeuchi † , atsushi otogawa †
DESCRIPTION
Investigation of Wireless Telecommunication for AMI. Katsuyuki KARIYA † , Tatsuya NAKAMURA † , Shinji TAKEUCHI † , Atsushi OTOGAWA † Yukio IWASHIMA †† , Yasuhisa MATSUSHITA †† Hitoshi KUBOTA ††† , Toshihiro INOUE ††† † : Chubu Electric Power Co., Inc., †† : ChubuSeiki Co., Ltd., - PowerPoint PPT PresentationTRANSCRIPT
Frankfurt (Germany), 6-9 June 2011
Katsuyuki KARIYA†,
Tatsuya NAKAMURA†, Shinji TAKEUCHI†, Atsushi OTOGAWA†
Yukio IWASHIMA††, Yasuhisa MATSUSHITA††
Hitoshi KUBOTA†††, Toshihiro INOUE†††
† : Chubu Electric Power Co., Inc.,†† : ChubuSeiki Co., Ltd.,
††† : Mitshubishi Electric Corporation
Katsuyuki KARIYA – Japan – Distribution network business activities and impact of regulation – 0737
Investigationof
Wireless Telecommunication for AMI
Frankfurt (Germany), 6-9 June 2011
Introduction Measured wireless media Conditions of measurements Results of the Investigation Summary
Outline
Katsuyuki KARIYA – Japan – Distribution network business activities and impact of regulation – 0737
Frankfurt (Germany), 6-9 June 2011
Why Advanced Metering Infrastructure (AMI)?
Improves efficiency of meter reading Energy conservation
Future; Efficient operation of power distribution under condition in which distributed power source are widely spread, etc
Introduction
Katsuyuki KARIYA – Japan – Distribution network business activities and impact of regulation – 0737
Frankfurt (Germany), 6-9 June 2011
SM
SMN
WAN
Server Computers
GW
What’s Advanced Metering Infrastructure (AMI)?
A Model of AMI System
Introduction
Millions of smart meters (SMs) perform two-way communication with Server computer via smart meter networks(SMNs), Gateways (GWs), and Wide area network (WAN).
Katsuyuki KARIYA – Japan – Distribution network business activities and impact of regulation – 0737
Frankfurt (Germany), 6-9 June 2011
Why wireless telecommunication? Number of meters per service transformer is
small (About 10~20 meters) Meters are installed outside
Introduction
Katsuyuki KARIYA – Japan – Distribution network business activities and impact of regulation – 0737
The installation cost of the PLC coupler is expensive in Japan.Therefore, the wireless is more cost effective .
Frankfurt (Germany), 6-9 June 2011
Introduction
Radio propagation characteristics of three kinds of license free wireless communication media were investigated.
What's suitable wireless media for AMI system? Easy to use Low cost
License Free Wireless media in Japan •2.4GHz wireless LAN•950MHz Low Power Radio•429MHz Low Power Radio
Katsuyuki KARIYA – Japan – Distribution network business activities and impact of regulation – 0737
Frankfurt (Germany), 6-9 June 2011
Measured wireless media2.4GHz
Wireless LAN
950MHz
Low Power Radio
429MHz
Low Power Radio
Output Power 10mW/MHz 10mW 10mW
Channel Band Width
22MHz 200kHz 8.5kHz
Modulation DSSS*1 GFSK*2 GFSK*2
Data Transfer Rate
1Mbps 100kbps 4.8kbps
Reference IEEE 802.11b
ARIB*3 STD-T33
ARIB STD-T96 ARIB STD T-67
*1 : Direct Sequence Spread Spectrum*2 : Gaussian Frequency Shift Keying*3 : Association of Radio Industry BusinessKatsuyuki KARIYA – Japan
– Distribution network business activities and impact of regulation – 0737
Frankfurt (Germany), 6-9 June 2011
Measurements excecuted under condition which simmulated communication
A) Between a GW placed on a utility pole and SMs of detached houses.
B) Between a GW placed on a utility pole and SMs in pipe shafts of an apartment building.
C) Among SMs in pipe shafts of an apartment.
Conditions of Measurements
Katsuyuki KARIYA – Japan – Distribution network business activities and impact of regulation – 0737
Frankfurt (Germany), 6-9 June 2011
Conditions of Measurements
A transmitter was placed on a handrail of outside stairs of an apartment building.
Receivers were placed by utility poles around the apartment building.
A) Communication between GW and SM of detached house
6m1.8m
ReceiverTransmitterKatsuyuki KARIYA – Japan – Distribution network business activities and impact of regulation – 0737
Frankfurt (Germany), 6-9 June 2011
Conditions of Measurements
A transmitter was placed in a pipe shaft of an apartment building.
Receivers were placed by utility poles around the apartment building.
B) Communication between GW and SM in Apartment Building
1.8m
Transmitter ReceiverPipe ShaftKatsuyuki KARIYA – Japan – Distribution network business activities and impact of regulation – 0737
Frankfurt (Germany), 6-9 June 2011
Conditions of Measurements
Both transmitter and receivers were placed in pipe shafts of an apartment building.
C) Communication among SMs in an Apartment Building
Transmitter & Receiver
Katsuyuki KARIYA – Japan – Distribution network business activities and impact of regulation – 0737
Frankfurt (Germany), 6-9 June 2011
Results of measurements
0
10
20
30
40
50
60
70
80
90
100
- 120 - 115 - 110 - 105 - 100 - 95 - 90 - 85 - 80 - 75 - 70 - 65 - 60 - 55 - 50
Received Signal Power [dBm]
Pac
ket
Erro
r Rat
e [%
]
2.4GHz wireless LAN Received Signal Power vs. Packet Error Rate
Received Signal Power vs. Packet Error rateServiceable areaWhere received signal power is strong enough and packet error hardly occurs.
Fringe areaWhere packet error increases
Unserviceable areaReceived signal power is so weak that packet error frequently occurs.
Katsuyuki KARIYA – Japan – Distribution network business activities and impact of regulation – 0737
Frankfurt (Germany), 6-9 June 2011
Results of measurements
Serviceable Area Fringe Area Unserviceable Area
Wireless LAN Received Power >= -85dBm
-85dBm> Received Power
>= -98dBm
-98dBm> Received Power
950MHz Low Power Radio
Received Power >= -95dBm
-95dBm> Received Power
>= -100dBm
-100dBm> Received Power
429MHz Low Power Radio
Received Power >= -90dBm
-90dBm> Received Power
>= -110dBm
-110dBm> Received Power
Classification of measurements Results
Katsuyuki KARIYA – Japan – Distribution network business activities and impact of regulation – 0737
Frankfurt (Germany), 6-9 June 2011
100m
200m
0°
180°
90°
270°100m
200m
0°
180°
90°
270°
Results of measurements
(a)2.4GHz Wireless LAN
A)Communication between GW and SM of detached house(1)
Katsuyuki KARIYA – Japan – Distribution network business activities and impact of regulation – 0737
100m
200m
0°
180°
90°
270°
Clear SpaceReinforced Concrete Building
Unserviceable AreaFringe AreaServiceable Area
(c)429MHz Low Power Radio(b)950MHz Low Power Radio
Frankfurt (Germany), 6-9 June 2011
950MHz low power radio had longest range in the three wireless media.
All of the three wireless media had difficulty to establish communication across the apartment building nearby.
Results of measurementsA)Communication between GW and SM of detached house(2)
Katsuyuki KARIYA – Japan – Distribution network business activities and impact of regulation – 0737
Frankfurt (Germany), 6-9 June 2011
30m
0°
90°
180°
270°
30m
0°
180°
90°
270°
30m
0°
180°
90°
270°
Results of measurements
(c)429MHz Low Power Radio(b)950MHz Low Power Radio(a)2.4GHz Wireless LAN
B)Communication between GW and SM in Apartment Building(1)
Katsuyuki KARIYA – Japan – Distribution network business activities and impact of regulation – 0737
Clear SpaceReinforced Concrete Building
Unserviceable AreaFringe AreaServiceable Area
Frankfurt (Germany), 6-9 June 2011
429MHz low power radio could establish communication between inside of a pipe shaft and utility poles on both steel door’s side and its opposite side of the pipe shaft.
2.4GHz wireless LAN and 950MHz low power radio had difficulty in communication between SM and GW on a steel door’s side of the pipe shaft.
Results of measurementsB)Communication between GW and SM in Apartment Building(2)
Katsuyuki KARIYA – Japan – Distribution network business activities and impact of regulation – 0737
Frankfurt (Germany), 6-9 June 2011
Results of measurements
8m8m 16m 16m
2m 1m6m2m
Pipe Shafts
Staircase
Dimensions of the Apartment Building.
(5-storied building)
C) Communication among SMs in Apartment Building(1)
Katsuyuki KARIYA – Japan – Distribution network business activities and impact of regulation – 0737
Chose an apartment building which has long distance between each pipe shafts.
Frankfurt (Germany), 6-9 June 2011
Results of measurements
(c)429MHz Low Power radio (a)2.4GHz Wireless LAN (b)950MHz Low Power radio
C)Communication among SMs in Apartment Building(2)
Katsuyuki KARIYA – Japan – Distribution network business activities and impact of regulation – 0737
Good communication even with adjacent pipe shaft
Poor communication with adjacent pipe shafts
Staircase Staircase Staircase
Room105
Room505
Tx
Room504
Room103
Room404
Room405
Room304
Room305
Room204
Room205
Room104
Room501
Room401
Room301
Room201
Room302
Room303
Room202
Room203
Room502
Room503
Room402
Room403
Room505
Room405
Room305
Room205
Room105
Room101
Room101
Staircase Staircase Staircase
Room303
Room103
Room304
Room305
Room204
Room205
Room104
Room501
Room502
Room503
Room505
Room301
Room201
Room101
Room504
Room404
Room402
Room403
Tx
Room105
Room505
Room405
Room305
Room205
Room405
Room105
Room202
Room203
Room101
Room302
Room401
Staircase Staircase Staircase
Room105
Room505
Room405
Room305
Room205
Room101
Room504
Room505
Room404
Room405
Room105
Room201
Room101
Room502
Room503
Room402
Room403
Room302
Room303
Room202
Room203
Room501
Room401
Room301
Room103
Room204
Room205
Room104
Room304
Room305
Tx
Unserviceable AreaFringe AreaServiceable Area Tx Transmitter
Frankfurt (Germany), 6-9 June 2011
429MHz low power radio could establish communication not only between SMs in same pipe shaft or between SMs in adjacent pipe shafts on same floor but also between SMs in adjacent pipe shafts on different floors.
Results of measurementsC)Communication among SMs in Apartment Building(3)
Katsuyuki KARIYA – Japan – Distribution network business activities and impact of regulation – 0737
Frankfurt (Germany), 6-9 June 2011
In view of serviceable area 950MHz low power radio is the most suitable communication media for smart meter network.
429MHz low power radio has advantages over two other wireless media for communication in apartment buildings.
Summary
Katsuyuki KARIYA – Japan – Distribution network business activities and impact of regulation – 0737
Frankfurt (Germany), 6-9 June 2011
The results of this investigation shows differences of radio propagation characteristics among wireless media.
Steady SMN must be built with selecting suitable wireless media for conditions of meter installation.
Summary
Katsuyuki KARIYA – Japan – Distribution network business activities and impact of regulation – 0737