南方电网技术2017，Vol.11Issue(9)：41-47,7.DOI:10.13648/j.cnki.issn1674-0629.2017.09.007
计及线间互感的两回输电线路交叉跨越故障的短路电流计算方法
Short Circuit Current Calculation Method for Crossing Fault of Two Transmission Lines with Mutual Inductance
摘要
Abstract
Considering the mutual inductance between lines, most of the fault analysis methods construct different compound sequential networks for different fault types, which causes large workload and makes it difficult to debug.Therefore, this paper proposes a short circuit current calculation method for two transmission lines considering mutual inductance between lines.In this paper, the node im-pedance matrix of the both fault lines'ends and the impedance of fault lines are used as inputs.The parameters of the original node im-pedance matrix are modified or expanded by adding tree branches or link branches to deal with mutual inductance between lines or adding fault points.Then, the sequence network equations at the fault point of the two transmission lines can be constructed.This pa-per presents a universal method for constructing the fault boundary condition matrix for two transmission lines.The phase-sequence transformation is used to construct the fault boundary condition equations for each sequence network.The voltage and the current at each fault point can be solved in conjunction with the sequence network equations.Finally, a fault simulation model of power network is built by PSCAD/EMTDC, and the results verify the correctness of the method.关键词
线间互感/输电线路/交叉跨越/故障节点阻抗矩阵/短路电流计算Key words
mutual inductance between lines/transmission line/crossing fault/fault node impedance matrix/short-circuit current cal-culation分类
信息技术与安全科学引用本文复制引用
唐旭,梁远升,杜婉琳,曾勇刚,洪潮,张帆..计及线间互感的两回输电线路交叉跨越故障的短路电流计算方法[J].南方电网技术,2017,11(9):41-47,7.基金项目
国家自然科学基金资助项目(51307065).Foundation item:Supported by the National Natural Science Foundation of China (51307065). （51307065）
