基于戴维南等值的输电线路不平衡度分析新方法  

New methods of analysis of the unbalanced degree of the transmission line based on Thevenin equivalent

作　　者：靳希[1] 吴文辉 吴世敏[1] 

机构地区：[1]上海电力学院电自学院,上海200090 [2]石狮电力有限责任公司,福建石狮362700

出　　处：《电力系统保护与控制》2011年第21期7-11,共5页Power System Protection and Control

基　　金：国家自然科学基金项目(50907039);上海市教委重点学科建设项目(J51301)~~

摘　　要：提出了基于PSS/E外网多端口戴维南等值的不平衡度分析新方法,并用Matlab编程计算得到四回输电线路定义的新的不平衡度指标。该方法提出了一个不平衡度的综合评价指标,比传统的只是依据线路本身参数得到的不平衡更加精确,可以分析多回未换位输电线路相位布置优化问题和线路运行不平衡对系统的影响以及线路检修,最大最小运行方式的改变等。建立的多回输电线路的不平衡度分析模型精确度高,可以对系统和线路本身进行系统运行方面的总体评估。This paper proposes an analysis method of the unbalanced degree based on a multi-port Thevenin equivalent network outside using PSS/E, and calculates the new imbalance degree index of four-circuit transmission lines with Matlab. The method presents a comprehensive evaluation index, which is more accurate than the traditional method only based on the transmission parameters itself and can analyze the phase optimization problems of multi-circuit transmission line, and also impact on the system under the line unbalanced operation and line maintenance, the changes in maximum and minimum operation mode and so on. The established unbalanced degree model of multi-circuit transmission line has high accuracy, can assess the operation of the system and the line comprehensively.

关 键 词：不平衡度 戴维南等值 综合评价指标 相位布置优化 

分 类 号：TM75[电气工程—电力系统及自动化]