电力系统保护与控制2025，Vol.53Issue(8)：178-187,10.DOI:10.19783/j.cnki.pspc.240456
基于振荡过零回路的限峰限流装置设计及限流特性分析
Peak current limiting device design using an oscillating zero crossing circuit and current limiting characteristics analysis
摘要
Abstract
Excessive short-circuit current in distribution networks of industrial and mining enterprises is one of the most severe threats to the stable operation of equipment.To address this issue,an electrical circuit comprising an LC series circuit connected in parallel with the main circuit breaker is proposed,generating a current frequency of approximately 1.3 kHz.The high-frequency current flows through the main circuit breaker along with the system short-circuit fault current,forcing the short-circuit current to reach zero earlier and enabling a short-circuit current-limiting strategy in a vacuum condition.The proposed strategy incorporates an ultra-high-speed vacuum circuit breaker with an opening time of less than 1.2 ms,and a parallel LC high-frequency oscillatory circuit as a forced zero-crossing unit.This setup allows the main circuit to be rapidly interrupted,while a current-limiting reactor is subsequently introduced to effectively suppress the short-circuit current.Furthermore,this paper provides a detailed analysis of the operating mechanism of the current-limiting device,key parameter design,and its potential application in real-world distribution networks.Simulation and experimental validations demonstrate that the proposed current-limiting device can limit the short-circuit peak to below 70%of the actual value,thereby significantly reducing the peak short-circuit current,mitigating the adverse impact on distribution network equipment,and substantially enhancing the overall system operational stability.关键词
LC高频振荡回路/强制过零/超高速真空断路器/限峰限流Key words
LC high-frequency oscillatory circuit/forced zero-crossing/ultra-high speed vacuum circuit breaker/peak current limiting引用本文复制引用
余银钢,潘天红..基于振荡过零回路的限峰限流装置设计及限流特性分析[J].电力系统保护与控制,2025,53(8):178-187,10.基金项目
This work is supported by the Technology Innovation Project of Anhui Province(No.202423i08050033). 安徽省科技创新攻坚计划项目资助(202423i 08050033) （No.202423i08050033）
国家自然科学基金项目资助(52377164) （52377164）
