Electric Power ›› 2020, Vol. 53 ›› Issue (7): 149-159.DOI: 10.11930/j.issn.1004-9649.201909119

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Performance Analysis of Generator Dynamic State Estimation under Uncertain Measurement

ZHAO Jingbo1, WEI Zhinong2, WANG Hanwen4, XIE Bing1, HUANG Mei3, MENG Xia1   

  1. 1. State Grid Jiangsu Electric Power Co., Ltd. Research Institute, Nanjing 211103, China;
    2. College of Energy and Electric Engineering, Hohai University, Nanjing 210032, China;
    3. State Grid Nantong Power Supply Co., Ltd., Nantong 226000, China;
    4. State Grid Suqian Power Supply Co., Ltd., Suqian 223800, China
  • Received:2019-09-20 Revised:2020-01-31 Published:2020-07-05
  • Supported by:
    This work is supported by National Natural Science Foundation of China (No.51607092), Natural Science Foundation of Jiangsu Province (No.BK20171433) and the Science and Technology Project of SGCC (Research on Deep Reinforcement Learning Technology Applied to the Analysis of Power Grid Operation Mode,No.5210EF190022)

Abstract: Random errors are unavoidable in phasor measurement unit (PMU), and the PMU measurement data may be uncertain in actual power system, such as delay, reordering or even missing. In order to accurately estimate the state information in the electromechanical transient process of power system, a generator dynamic state estimation model is firstly established under the missing measurement; And then, the model is simulated in an actual power system using the unscented mixture filter (UMF), particle filtering (PF) and the improved particle filtering (IPF) proposed in this paper respectively. The results show that, under uncertain measurement, the proposed IPF is superior to UMF and PF in filtering performance and robust performance, and more applicable to generator dynamic state estimation.

Key words: improved particle filter, unscented mixture filter, generator electromechanical transient, dynamic state estimation, uncertain measurement