中国电力 ›› 2021, Vol. 54 ›› Issue (5): 74-82.DOI: 10.11930/j.issn.1004-9649.202004082

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基于PageRank算法的输电网连锁故障脆弱线路辨识

魏明奎1, 周全1, 宋雨妍2, 王渝红2, 周泓1, 蔡绍荣1, 江栗1   

  1. 1. 国家电网有限公司西南分部,四川 成都 610031;
    2. 四川大学 电气工程学院,四川 成都 610065
  • 收稿日期:2020-04-12 修回日期:2020-10-14 发布日期:2021-05-05
  • 作者简介:魏明奎(1970-),男,高级工程师,从事电力系统运行与控制、电力系统规划等研究,E-mail:wmk1666@163.com;宋雨妍(1994-),女,通信作者,博士研究生,从事高压直流输电、电力系统稳定与控制、新能源接入等研究,E-mail:yuyan_syy@163.com;王渝红(1971-),女,博士,教授,从事高压直流输电、电力系统稳定与控制、新能源接入等研究,E-mail:yuhongwang@scu.edu.cn
  • 基金资助:
    国家电网有限公司科技项目(西南纯送端电网规划研究,SGSW0000GHJS1900117)

Identification of Vulnerable Lines in Transmission Network for Cascading Failure Based on PageRank Algorithm

WEI Mingkui1, ZHOU Quan1, SONG Yuyan2, WANG Yuhong2, ZHOU Hong1, CAI Shaorong1, JIANG Li1   

  1. 1. Southwest Branch of State Grid Corporation of China, Chengdu 610031, China;
    2. College of Electrical Engineering, Sichuan University, Chengdu 610065, China
  • Received:2020-04-12 Revised:2020-10-14 Published:2021-05-05
  • Supported by:
    This work is supported by Science and Technology Project of State Grid Corporation of China (Study on Power Grid Planning of Southwest Transmission Terminal, No.SGSW0000GHJS1900117)

摘要: 为快速准确识别输电网中可能触发连锁故障的脆弱线路,基于PageRank算法提出一种计及连锁故障级联效应的输电网脆弱线路双层辨识方法。首先,考虑连锁故障的演化进程,建立基于快照的输电网时序网络模型;其次,综合考虑线路间的交互影响和输电线路对负荷波动的抗扰能力,基于拓展PageRank算法构建浅层辨识模型,用于快速计算输电线路的脆弱度;最后,通过算法重构表征连锁故障间的关联关系,搭建脆弱线路的深层辨识模型,以综合分析输电线路的脆弱性,并刻画连锁故障中线路脆弱性的变化过程。基于IEEE 39节点系统的仿真算例验证了所提脆弱线路辨识方法的合理性和准确性。

关键词: 脆弱线路, PageRank算法, 连锁故障, 隐故障

Abstract: In order to quickly and accurately identify the vulnerable lines that may trigger cascading failure in the power grid, a double-layer method for identifying vulnerable lines in the transmission network was proposed based on PageRank algorithm, which takes into account the cascading effect of faults. Firstly, the time series network model of transmission network is established based on the snapshot method with consideration of the evolution process of the cascading failure. Then, regarding the interaction of transmission lines and the immunity of lines to load fluctuation, a shallow identification model based on extended PageRank algorithm is constructed to calculate the vulnerability of transmission lines. Finally, the algorithm reconstruction is used to show the relationship between failures and the deep identification model of vulnerable lines is established to comprehensively analyze the vulnerability of lines. The change process of vulnerability in the cascading failure can be described at the same time. A case study was carried out on IEEE 39 bus system to demonstrate the rationality and accuracy of the suggested method.

Key words: vulnerable lines, PageRank algorithm, cascading failure, hidden fault