电力建设2024，Vol.45Issue(7)：113-121,9.DOI:10.12204/j.issn.1000-7229.2024.07.010
考虑变电站内接线和拓扑瞬态调整的断路器短路电流分析
Analysis of Short-Circuit Current of Circuit Breakers Considering Substation Wiring and Topology Transient Adjustment
摘要
Abstract
With the development of power grids,the problem of excessive short-circuit current has grown prominent.The short-circuit current-limiting method,which is based on dynamic adjustment of the system topology,can effectively limit the short-circuit current.This study analyzed the influence of the transient processes during topology adjustment on the short-circuit current of circuit breakers for typical wiring methods.The analysis method of the short-circuit current considering the wiring topology and circuit breaker action sequence was studied.Moreover,the characteristics of the circuit breaker current before and after the application of suppression measures to typical substations were studied.The results show that the fault location and circuit breaker action sequence have a significant impact on the short-circuit current characteristics of circuit breakers.In particular,for one-and-a-half circuit breaker wiring,the maximum short-circuit current of the circuit breaker appears during the process of breaking,and it passes through the circuit breaker that breaks the last.After a fault occurs,rapidly changing the system topology using fast circuit breakers before the conventional circuit breaker opens can effectively reduce the breaking current of the circuit breaker.关键词
断路器/短路电流/拓扑调整/瞬态过程Key words
circuit breaker/short-circuit current/topology adjustment/transient processes分类
信息技术与安全科学引用本文复制引用
郄鑫,文韬,韩彬,胡杰,竺沁然,许刚..考虑变电站内接线和拓扑瞬态调整的断路器短路电流分析[J].电力建设,2024,45(7):113-121,9.基金项目
This work is supported by National Natural Science Foundation of China(No.52277142)and Project Supported by Science and Technology Project of SGCC(No.5100-202119014A-0-0-00). 国家自然科学基金项目(52277142) （No.52277142）
国家电网有限公司科技项目"短路电流柔性抑制方法及关键技术研究"(5100-202119014A-0-0-00) （5100-202119014A-0-0-00）
