单端电气量组合故障测距方法的适用性分析  

Applicability Analysis on Combined Fault Location Algorithm Based on Single Terminal Data

作　　者：刘琨[1] 董新洲[2] 

机构地区：[1]广东电网电力调度控制中心,广东广州510600 [2]清华大学电力系统及发电设备安全控制和仿真国家重点实验室,北京100084

出　　处：《广东电力》2012年第6期9-14,共6页Guangdong Electric Power

基　　金：国家自然科学基金资助项目(50937003;51007045;51120175001);北京市自然科学基金资助项目(3102017)

摘　　要：为了研究基于测量阻抗法与单端行波法相结合的组合故障测距法的适用性,分析了测量阻抗法测距的误差来源,给出其误差计算公式;同时分析了影响单端行波法应用的因素,确定了其适用范围。依据这两种测距法的特点给出了组合故障测距的适用范围,即当故障电阻小于300Ω、测量端故障线路并联数不为1时能保证较高的测距精度。通过仿真验证了测量阻抗法误差分析、单端行波法和组合测距法适用范围研究结果的正确性。For the research on applicability of fault location algorithm based on combination between impedance measurement method and single terminal travelling wave method, the paper analyzes error source of impedance measurement method and presents the formula for error calculation; it also introduces factors that influence single terminal travelling wave method and determines the application field. In accordance with characteristics of the two methods, application field of the combined fault location is presented： higher location precision can only be guaranteed in case the fault resistance is smaller than 300 I2 and faulty parallel lines at the measured terminal is not unique. Correctness of analyzing error of impedance measurement and research on application range of single terminal travelling wave method and combined fault location method is verified by simulation.

关 键 词：单端电气量 故障测距 测量阻抗法 单端行波法 组合法 

分 类 号：TM764.1[电气工程—电力系统及自动化]