刘麒麟,张英敏,张明奇,陈若尘,彭宇锋.直流电网输电线路短路故障的单端化近似解析计算方法[J].电测与仪表,2023,60(3):47-52. LIU Qilin,ZHANG Yingmin,ZHANG Mingqi,CHEN Ruochen,PENG Yufeng.A single terminal approximate analytical method for short circuit fault of transmission lines in DC power grid[J].Electrical Measurement & Instrumentation,2023,60(3):47-52.
直流电网输电线路短路故障的单端化近似解析计算方法
A single terminal approximate analytical method for short circuit fault of transmission lines in DC power grid
MMC-HVDC is the core technology to absorb renewable clean energy and construct DC power grid. Transmission line short-circuit fault is a common fault in DC power grid, and its fault current level affects the parameter design of key equipment in DC power grid. Taking Zhangbei DC power grid as the research object, by means of network open-loop, healthy pole open circuit, independence of grounding branch and Thevenin equivalent, the order of the circuit decreases gradually. A decoupled single port simplified model is established. Proposed a single terminal approximate analytical method for DC power system short circuit fault. The proposed calculation method has been verified on PSCAD / EMTDC simulation platform, which has reference significance for fault current influence factor analysis and fault current level suppression.
