输电线路零序阻抗参数测量方法  

Measurement methods of zero-sequence impedanc parameters for transmission lines

作　　者：胡志坚[1] 程小敏[1] 

机构地区：[1]武汉大学电气工程学院,湖北武汉430072

出　　处：《电力科学与技术学报》2010年第3期25-31,共7页Journal of Electric Power Science And Technology

基　　金：国家自然科学基金(50477018)

摘　　要：输电线路零序阻抗是进行潮流计算、短路计算、继电保护整定计算等的重要参数。实测时由于难以将所有存在互感耦合的输电线路全部停电,传统测量方法难以消除干扰的影响.近年来出现了很多输电线路零序参数带电测量的新方法,主要有异频法、增量法(含代数法、微分法、积分法)、干扰法以及基于同步相量测量技术的测量方法等.针对几种典型的零序参数测量方法进行深入分析,对增量法和干扰法的数学模型、测量技术进行阐述,探讨各自的特点及适用范围,并且根据实测经验对各种测量方法进行综合评价.The zero-sequence impedances of transmission lines are the great importance parameters for the calculation of power flow, short-circuit and protective relay settings. Because the requirement that all transmission lines with mutual inductances must be withdrawn from normal opera- tion cannot be achieved, the conventional measurement methods cannot remove of the interference of mutual inductance. In recent years, new live line measurement methods are proposed, including the different frequency method, the incremental method, the interference method and the method based on synchronized phasor measurements. The principles of these methods are introduced in this paper. The mathematic models and the measurement technologies of the incremental method and interference method are also presented, and their characteristic and application fields are given. Finally, a comprehensive evaluation of these methods is given according to the field test experiences.

关 键 词：输电线路 零序阻抗 带电测量 增量法 干扰法 

分 类 号：TM934[电气工程—电力电子与电力传动]