Practice in PMU Development for Smart Substation
Bonian Shi BEIJING SIFANG AUTOMATION CO.,LTD Jun. 2012 Outline
PMU Application in Wide Area Protection
PMU Development for Smart Substation
Future Application under Smart Substation Current Status of PMU Deployment in China For monitoring use Have covered all 500kV and above substation Will be deployed in 220kV level with large scale Required installation for wind farm connected to main grid Wide area damping control system in CSG
Closed loop operation of HVDC modulation damping control RTDS test completed for wide area PSS control Guizhou Duyun Wide Area Protection System
Duplicated Master Station, located at 220kV Duyun substation
Sub Control Stations at two 220kV and five 110kV substations
Guizhou Duyun South-area power grid wide- area protection system geographical Guizhou Duyun wide- Distruibution area protection and 220KVDuyun 500kVStation control system station 110KV Danzhai Wide-area protection 25km Station Wide-area protection and control system and control system 25km 220kVStation master-station master-station Power flow 1 A set B set 110kVStation Ethernet 26km
110KV Sandu Wide-area protection Station master-station Wide-area system 500KV Dushan management master- 220KVShipai station Station Wide-area protection Station Sub-station Cement 39km plant
110KV Zhouqin Station
110KV Xiangzhai 24km Station 110KV Libo 15km Station 220KV Mawei 1km 43km Station 1km Power flow 2 110KV Maolan 110KV Xinzhai Station Station Lilang New 6 line 220Kv Mawei station 110Kv Xinzhai station 110Kv Libo station 110Kv Zhouqin station 110Kv Sandu station 110Kv Danzhai station 220Kv Duyun station 110KV Langxiang To Guangxi Hydropower Station Liuzhai Station RTDS Test for Guizhou Duyun WAP System
原始波形 3000 0SDb-0三周润-IA 2000 0SDb-0三周润-IB 0SDb-0三周润-IC 1000
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350 400 450 500 550 600 650 700 750 时间 (毫秒) 原始波形 3000 0SDb-0丹三线-IA 2000 0SDb-0丹三线-IB 0SDb-0丹三线-IC 1000
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350 400 450 500 550 600 650 700 750 时间 (毫秒) Backup protection function For line ground fault and circuit breaker failure case, by conventional Zone 2 relays, the delay for fault clearance is usually 0.5～1.0s. For above same fault, WAP quickly detects the breaker failure, and after 0.2s confirmation delay, trips neighbor breakers. Action Results and Data Recordings from Field Operation 3 phase short circuit fault
Guizhou Duyun South-area power grid wide- area protection system geographical Distruibution 220KVDuyun Fault 500kVStation station 110KV Danzhai 25km Station
25km 220kVStation Power flow 1 Voltage 110kVStation 26km
110KV Sandu Wide-area protection Station master-station
500KV Dushan 220KVShipai Station Wide-area protection Station Sub-station Cement 39km plant
110KV Zhouqin Station
110KV Xiangzhai 24km Fault Station 110KV Libo 15km Station 220KV Mawei 1km 43km Current Station 1km Power flow 2 110KV Maolan 110KV Xinzhai Station Station Lilang New 6 line
110KV Langxiang To Guangxi Hydropower Station Liuzhai Station Action message output from master station
Action of wide area current differential protection IT Evolution in substation In China today, all the devices in all 220kV and above substations are microprocessor based, all links between control room and relay room are optical fibers. While links between relay room and switch yard are mainly conventional cables. Next steps towards smart substation – Electronic CTs and PTs; – Optical tripping; – Adoption of IEC61850 specification.
Infrastructure of integrated supervision and control system of smart substation
Dispatching level Dispatching center
Station level PDC
Bay level
PMU
MU Process level Development of Digitalized PMU
PMU interface definition
PMU test platform Application in Changchun South 500kV smart substation Phasor calculation and real-time communication to dispatching center Under IEC61850, equipment modeling, receiving and processing of SV/GOOSE message, MMS service for sharing data with supervisory devices and other IEDs Future work for PMU development under smart substation
Standard PMU modeling and compatibility with IEC61850-90-5
With improved reliability of MUs, switches, etc, PMU can be used for wide area protection under networklized smart substations Any Question?