电容双向充电的新型混合直流断路器研究  

New type of hybrid DC circuit breaker with bidirectional capacitor charging

作　　者：周永勤[1] 赵洪鹏 王宁 胡海涛[1] ZHOU Yongqin;ZHAO Hongpeng;WANG Ning;HU Haitao(School of Electrical and Electronic Engineering,Harbin University of Science and Technology,Harbin 150080,China;Power Dispatching Control Center,State Grid Heilongjiang Electric Power Limited Company,Harbin 150090,China)

机构地区：[1]哈尔滨理工大学电气与电子工程学院,哈尔滨150080 [2]国网黑龙江省电力有限公司电力调度控制中心,哈尔滨150090

出　　处：《黑龙江大学自然科学学报》2019年第5期597-603,共7页Journal of Natural Science of Heilongjiang University

基　　金：黑龙江省教育厅科学技术研究面上项目(12541178)

摘　　要：针对直流电网电流中断问题,提出了一种电容双向充电的新型混合直流断路器拓扑结构,实现了机械开关快速无弧分断及电容器储能重复使用。在深入分析断路器工作过程的基础上,提出了基于故障电流瞬时值和变化率的控制策略,缩短故障电流导通时间,提高了断路器的分断速度。通过对断路器合闸操作、故障分闸操作和电容器充电操作过程的仿真与分析,验证了所提断路器的可行性和实用性。Aiming at the problems of circuit breaker in DC power grid,a novel hybrid DC circuit breaker topology is proposed with bidirectional capacitor charging to achieve fast arc-less interruption of mechanical switches and the reusage of capacitor energy storage.On the basis of in-depth analysis of the working process of circuit breaker,a control strategy is proposed based on the instantaneous value and the rate of change of fault current so as to shorten the on-time of the fault current as well as to improve the breaking speed of circuit breaker.The feasibility and practicability of the circuit breaker mentioned are verified by the simulation and analysis of the closing operation,fault opening operation and capacitor charging operation process of the circuit breaker.

关 键 词：断路器 电容双向充电 快速无弧分断 控制策略 

分 类 号：TM7[电气工程—电力系统及自动化]