南方电网技术2017，Vol.11Issue(8)：61-64,71,5.DOI:10.13648/j.cnki.issn1674-0629.2017.08.009
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
摘要
Abstract
With the increasingly dense distribution of transmission lines, the possibility of fault at the crossing point of two transmission lines is intensively increasing.The existing short circuit calculation can only deal with the complex fault types with multi-point while it is unable to deal with the complex fault at the same crossing position with multi-span points.Therefore, this paper presents a short cir-cuit current calculation method for crossing fault types with multi-span points.Firstly the sequence network equations at the fault point of two crossing transmission lines are constructed, and a general fault topology for complex fault with multi-span points is established. Then, the fault boundary condition equations for crossing fault port of two transmission lines are constructed based on phases.The phase sequence transformation is used to convert the fault boundary condition equations for each order network, and the fault current and voltage are solved by jointing the sequence network equations.Finally, a fault simulation model of power network is constructed by PSCAD/EMTDC, and the results verify the correctness of the method.关键词
输电线路/交叉跨越故障/短路电流计算Key words
transmission line/crossing fault/short circuit current calculation分类
信息技术与安全科学引用本文复制引用
曾勇刚,洪潮,张帆,唐旭,林加隽,梁远升..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(8):61-64,71,5.基金项目
国家自然科学基金资助项目(51307065).Supported by the National Natural Science Foundation of China (51307065). （51307065）
