中国电力 ›› 2016, Vol. 49 ›› Issue (2): 114-117.DOI: 10.11930/j.issn.1004-9649.2016.02.114.04

• 电网 • 上一篇    下一篇

考虑抗差状态估计大误差点的电网可疑参数辨识及其应用

金学成1,邹根华1,张浩2,孙玥3,崔波3   

  1. 1.国网江西省电力公司,江西 南昌 330077;
    2.国网冀北电力有限公司,北京 100053;
    3. 清华大学 电机系电力系统国家重点实验室,北京 100084
  • 收稿日期:2015-09-01 修回日期:2016-03-21 出版日期:2016-02-18 发布日期:2016-03-21
  • 作者简介:金学成(1978-),男,吉林长春人,高级工程师,从事电网调度自动化及电力系统安全稳定研究。E-mail: jin-xc@yahoo.com

A Network Parameter Errors Identification Method Considering Large Error Point Based on Robust State Estimation and Its Real Application

JIN Xuecheng1, ZOU Genhua1, ZHANG Hao2, SUN Yue3, CUI Bo3   

  1. 1. State Grid Jiangxi ElectircPower Company, Nanchang 330077, China;
    2. State Grid Jibei Electirc Power Company Limited, Beijing 100053, China;
    3. State Key Lab of Power Systems, Dept of Electrical Engineering, Tsinghua University, Beijing 100084, China
  • Received:2015-09-01 Revised:2016-03-21 Online:2016-02-18 Published:2016-03-21

摘要: 错误的电网参数导致电力系统中状态估计结果出现偏差,严重影响各种高级应用的实用性。首先分析了一种能够自动排除不良数据对状态估计的影响且具有较高计算效率的抗差状态估计模型;然后提出了通过计算量测偏差与线路平衡状态来生成可疑线路的方法;最后采用变步长积分法估计可疑线路的参数修正值。通过在某省级电网调度中心的应用,实测结果验证了该方法的正确性与有效性。

关键词: 电网参数, 辨识与估计, 电力系统, 状态估计

Abstract: Network parameter errors can significantly deteriorate state estimation results in power system. Firstly, a robust state estimation model with ability to avoid bad data influence automatically is investigated. Then, a practical suspicious parameters identification method is developed. The method is based on measurement residuals and mismatch between states on two branch terminals. Finally, a variable step integration algorithm is used to estimate identified suspicious parameters. The proposed method has been deployed in several provincial power control centers. Numerical results of a real provincial power system are given to demonstrate its correctness and effectiveness.

Key words: network parameter, identification and estimation, power system, state estimation

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