台风条件下区域电力系统的重要线路多维度辨识  

Multi-dimensional Critical Line Identification for Regional Power Systems Under Typhoon

作　　者：韩畅 林振智[1] 杨莉[1] 林捷 刘远威 祝锦发 HAN Chang;LIN Zhenzhi;YANG Li;LIN Jie;LIU Yuanwei;ZHU Jinfa(School of Electrical Engineering,Zhejiang University,Hangzhou 310027,China;Shantou Power Supply Bureau of Guangdong Power Grid Co.Ltd.,Shantou 515041,China;Shanwei Power Supply Bureau of Guangdong Power Grid Co.Ltd.,Shanwei 516600,China)

机构地区：[1]浙江大学电气工程学院,浙江省杭州市310027 [2]广东电网有限责任公司汕头供电局,广东省汕头市515041 [3]广东电网有限责任公司汕尾供电局,广东省汕尾市516600

出　　处：《电力系统自动化》2018年第15期118-125,共8页Automation of Electric Power Systems

基　　金：国家重点研发计划资助项目(2016YFB0900105);国家自然科学基金资助项目(51377005)~~

摘　　要：准确识别电网中的重要线路并对其进行优先加固,可以提高台风条件下电力系统的安全可靠运行水平。为了有效辨识重要线路,综合考虑了线路在拓扑结构和运行状态中的地位、线路故障后的经济损失、线路参数及外部环境对重要线路辨识结果的影响,提出了加权线路介数、改进潮流熵、局部变化量、经济损失度、线路故障率这5个线路重要度的多维度评价指标。这些多维度评价指标能够综合考虑复杂电力系统的关键特征参数,克服了单一维度评价的局限性。然后,采用以集成权重与主客观权重间的离差平方和最小为目标的最优组合权重模型来确定指标权重,兼顾决策者的主观性和数据内在联系的客观性。在此基础上采用基于雷达图法的线路评价方法,能够科学形象地对线路进行综合评价。仿真结果表明,所提方法能够综合考虑影响重要线路辨识的各项因素,较好地反映台风条件下线路在电网中的重要程度。It plays an important role to identify and preferentially reinforce critical line in power systems in the secure and stable operation of power systems under typhoon conditions.In order to identify the critical line effectively,the location of transmission lines in the network topology structure,the operation state of power systems,the economic loss of the lines fault,and the influence of the lines parameter and external environment on the identification results are considered.Five multidimensional evaluation indexes,i.e.weighted line betweenness,improved power flow entropy,local variation,economic loss and the failure rate of lines,are presented to evaluate the importance of lines.The multi-dimensional evaluation indexes can comprehensively take critical characteristic parameters of complex power systems into consideration,which could overcome the limitation of single dimension of evaluation index.The optimal combination weight method,which aims at minimizing the sum of squared deviations between integration weights and the subjective and objective weights,is adopted to determine the weights of indices for considering both the subjectivity of the decision makers and the objectivity of the inherent relationship of the indexes data.The radar chart method is adopted to evaluate the transmission lines synthetically and identify critical line.The simulation results show that the proposed method can consider various factors in the identification of critical line comprehensively and better reflect the importance degree of the lines under typhoon conditions in the power systems.

关 键 词：重要线路辨识 拓扑结构 运行状态 最优组合权重 雷达图 

分 类 号：TM75[电气工程—电力系统及自动化]