超高压同杆双回线多重故障的计算  

Multi-fault Calculation of EHV Double Circuits Transmission Lines

作　　者：林军[1] 

机构地区：[1]福建工程学院,福建省福州市350000

出　　处：《中国电机工程学报》2010年第13期89-93,共5页Proceedings of the CSEE

基　　金：福建省自然科学基金项目(2008J0011);福建省科技计划重点项目(2009H003)~~

摘　　要：用对称分量法进行超高压同杆双回线故障计算时将遇到零序分量间存在零序互阻抗和零序互电纳的问题。提出一种采用特征模量分解方法对同杆多回线间的零序参数解耦,并给出了同杆双回线零序参数特征模量分解矩阵,通过特征模量分解得到同杆双回线路两端之间的零序电量关系。利用正序、负序和零序分量构成转移矩阵,实现同杆双回线任意故障的计算,算法采用分布参数的线路数学模型,具有较高精度。以此为基础提出同杆双回线多处横向故障的计算方法,该计算方法有通用性好和易于实现的特点。There are mutual impedance and mutual admittance in zero sequence network of double circuit that makes it difficult to calculate fault circuits by symmetry component method. This paper introduced an eigen-mode decomposing method to decouple zero sequence parameter in double circuit. The decomposing matrix of eigen-mode component is given. The zero sequence component relationship between voltages or currents at two terminals of double circuit was achieved by composing eigen-mode components. Positive, negative and zero sequence components form transfer matrix and the fault calculation of EHV double circuit can be realized. Distributed transmission line model was adopted in the algorithm and the algorithm has higher accuracy. The fault calculation method for multipoint crossing line faults of double-circuit on the same pole is given. This method is simple and is easy to be realized.

关 键 词：对称分量 双回线 故障计算 零序 解耦 

分 类 号：TM71[电气工程—电力系统及自动化]