The dynamic behavior of PMU and the latest development in China

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1 Celebrating the Visions of Synchrophasor Pioneers: A technical symposium in honor of Arun Phadke and Jim Thorp,Washington DC,May 8 & 9, 2013 The dynamic behavior of PMU and the latest development in China Tianshu Bi North China Electric Power University

2 Outline The Development of PMU and WAMS in China The PMU Standard and Performance Test Time with Prof. A. Phadke and Prof. J. Thorp

3 3 Installed Capacity in China 1056GW Installed Capacity and Peak Load 220GW/162GW Installed Capacity and Peak Load 93GW/43GW North East China Installed Capacity and Peak Load 94GW/48GW North West China North China Installed Capacity and Peak Load 199GW/176GW 西藏电网 Tibet Installed Capacity and Peak Load 193GW/125GW Central China East China PMU performance is crucial for dynamic security control South China (CSG)

4 The history of PMUs in China GPS has been introduced to Chinese power grid since Synchronized Phasor Measurement Techniques have attracted increasingly interests since the middle of 1990s. CEPRI attempts to introduce ADX3000 from Taiwan to China during Since 2002, Chinese manufacturers have their own PMUs with intellectual properties, some of them have begun to expand to oversea markets.

5 Two types of PMUs in China GPS PMUs for substations Dispatch center PMUs for generations GPS Slot added sensor Beijing Sifang Automation Co., Ltd; China Electric Power Research Institute; NARI Technology Development Co., Ltd; NARI-Relay Electric Co., Ltd.

6 Application History of WAMS/PMU in China Dynamic model parameter was identificated during Large Disturbance Test Serious contingency events in Central China was recorded by WAMS WAMS is integrated as a part of SG-OSS WAMS was put into operation in NPDCC PMU was used for Low-frequency oscillations analysis PMU data was tried to improve State Estimation WAMS is deployed in every Regional and Provincial Power Grid Copyright of Dr. Yaozhong Xin, SG Dispatching Centere

7 About 2500 PMUs PMU comissioned in China PMU PMUs cover all the 500kV substations, 100MW and above generators, and some important 220kV substations

8 PMU Applications in China Real-time dynamic status monitoring and alarm processing Low-frequency oscillation identification and control Model validation and parameter identification PMU Wide area protection against cascading trips PMU dynamic behavior, testing and calibration State estimation with PMU measurements

9 Outline The Development of PMU and WAMS in China The PMU Standard and Performance Test Time with Prof. A. Phadke and Prof. J. Thorp

10 PMU standards in China In 2003, Technology Guidance of Power System Real Time Dynamic Monitoring System was released for the first time For the first time, the definition of the phasor, the functions of substation and main station, the accuracy of phasor were required. In 2005, Technology Guidance of Power System Real Time Dynamic Monitoring System was revised The 2003 standard was revised, the PMU measurement performances and the data transformation format were specified in details. In 2011, Test Specification for Synchrophasor Measurement Unit for Power System was released. The PMU measurement accuracy under magnitude and frequency modulation, and step change were specified in details.

11 Frequency Scan Test 正序电压幅值误差平均值 Voltage Magnitude Error(%) (%) 正序电压相角误差平均值 Voltage Phase angle Error( ) ( ) PMU static performance test results 正序电压幅值误差统计 Frequency(Hz) 频率正序电压相角误差统计 % Frequency(Hz) 频率 PMU1 PMU2 PMU3 PMU4 PMU1 PMU2 PMU3 PMU4

12 PMU dynamic performance test results Magnitude Modulation Test Number 频数 正序电压幅值误差平均值 Voltage Magnitude Error(%) 正序电压幅值误差统计 Modulation 调制频率 Frequency(Hz) 正序电压幅值误差分布 % PMU1 PMU2 PMU3 PMU4 PMU1 PMU2 PMU3 PMU Voltage 正序电压幅值误差 Magnitude Error(%)

13 PMU dynamic performance test results Frequency Modulation Test Numbers Errors means(hz) The means of frequency errors Modulation frequency(hz) The frequency errors distribution Hz PMU1 PMU2 PMU3 PMU4 PMU1 PMU2 PMU3 PMU The frequency errors(hz)

14 Step Test PMU dynamic performance test results Response time PMU1 PMU2 PMU3 PMU4 The magnitude step (ms) The phase angle step (ms) Infinite The frequency step (ms)

15 PMU dynamic performance test results Ramp of Frequency Test Numbers Errors means(hz/s) 10 5 The means of ROCOF errors Modulation frequency(hz) The ROCOF error distribution Hz/s PMU1 PMU2 PMU3 PMU4 PMU1 PMU2 PMU3 PMU The ROCOF errors(hz/s)

16 PMU performance test results According the algorithm analysis and PMU performance evaluation, the Chinese PMU standards are under revision. Cooperated with the State Grid Corporation of China, the formal PMU test of all PMUs from Chinese manufactures will be implemented in June or July, which would promote the development of the PMU test technology.

17 Outline The Development of PMU and WAMS in China The PMU Standard and Performance Test Time with Prof. A. Phadke and Prof. J. Thorp

18 CRIS Events (2002, 2004, 2006, 2008, 2010)

19 111 project

20 Three workshops on PMU and its applications

21 Letters from Prof. Qixun Yang Warmest and most sincere congratulations on your careers with remarkable contributions to the power industry, not only for US, but also for China.