一种组合式直流断路器的供能方法  

An Energy Supply Method of Combined DC Circuit Breaker

作　　者：张旭阳 张茂松[1,2] 王秀芹[1,2] 陈忠[3] 王群京 ZHANG Xuyang;ZHANG Maosong;WANG Xiuqin;CHEN Zhong;WANG Qunjing(College of Electrical Engineering and Automation,Anhui University,Hefei 230601,Anhui,China;Anhui Provincial Collaborative Innovation Center for Industrial Power Saving and Power Quality Control,Anhui University,Hefei 230601,Anhui,China;State Grid Anhui Electric Power Research Institute,Hefei 230601,Anhui,China)

机构地区：[1]安徽大学电气工程与自动化学院,安徽合肥230601 [2]安徽大学工业节电与电能质量控制安徽省级协同创新中心,安徽合肥230601 [3]国网安徽省电力有限公司电力科学研究院,安徽合肥230601

出　　处：《电气传动》2025年第3期64-71,共8页Electric Drive

基　　金：国家电网有限公司总部管理科技项目(5500-202220110A-1-1-ZN)。

摘　　要：针对当前高压直流断路器的转移支路多采用不可控全桥的变压器耦合供能,不利于可控稳定的供电,且能量利用率低的问题,提出了一种组合式直流断路器的供能方法。方法采用带储能装置(蓄电池或者超级电容)的双向DC-DC变换器拓扑对组合式直流断路器谐振转移支路中的预充电电容进行电压控制和能量回收及再利用;开发了以双有源桥变换器(DAB)为例DC-DC供能的控制策略。改进的供能方法既可以保证直流电网故障时组合式高压直流断路器迅速开断期间转移支路能量的快速稳定供给,又能够将回收的能量用于故障恢复后的重合闸过程。仿真及实验结果表明:所提出的双向DC-DC变换器代替不可控全桥的组合式高压直流断路器供能方法输出电压更加稳定,并且提高了系统的能量利用率。In view of the problem that the transfer branch of the current high-voltage DC circuit breaker mostly adopts uncontrollable full-bridge transformer coupling energy supply,which is not conducive to controllable and stable power supply,and low energy utilization,a combined DC circuit breaker energy supply method was proposed.A bidirectional DC-DC converter topology with energy storage device(battery or super capacitor)was used to control the voltage control and energy recovery and reuse of the precharged capacitor in the resonant transfer branch of the combined DC circuit breaker.A control strategy for DC-DC energy supply using dual-active bridge(DAB)was developed as an example.The improved energy mode of supply can not only ensure the fast and stable supply of transferred branch energy during the rapid opening of the combined high-voltage DC circuit breaker in the event of DC power grid failure,but also use the recovered energy for the reclosing process after fault recovery.The simulation and experimental results show that the proposed bidirectional DC-DC converter replaces the uncontrollable full-bridge combined high-voltage DC circuit breaker energy supply method,and the output voltage is more stable,and the energy utilization rate of the system is improved.

关 键 词：直流断路器 供能 故障开断 双有源桥变换器 

分 类 号：TM561[电气工程—电器]