新型直流微网混合断路器拓扑及仿真分析  

Topology and Simulation Analysis of a Novel DC Microgrid Hybrid Circuit Breaker

作　　者：张冠英[1] 高飞 羡一鸣 王尧[1] ZHANG Guan-ying;GAO Fei;XIAN Yi-ming;WANG Yao(School of Electrical Engineering,Hebei University of Technology,Tianjing 300130,China)

机构地区：[1]河北工业大学电气工程学院,天津300130

出　　处：《计算机仿真》2021年第3期206-210,315,共6页Computer Simulation

基　　金：国家自然科学基金青年基金资助项目(51607055)。

摘　　要：在直流微电网系统中,由于缺乏电流过零点,电弧的熄灭是一个巨大的问题。为了使直流输电系统发生故障时断路器能够快速无弧分断电路,设计了一种基于零电流开断的新型混合式直流断路器拓扑结构。该拓扑结构不仅能够迅速切断故障电流熄灭电弧,并且解决了基于传统强迫换流原理的混合断路器开断时需要给预充电电容另加额外充电电路的问题。本文详细介绍了提出的拓扑结构工作原理,重点针对电压等级为400V的直流微电网系统建立了混合式直流断路器的仿真模型,通过仿真,验证了该断路器能够快速分断直流故障电流。之后针对不同外电路参数和转移支路参数进行了电流转移特性的仿真,进一步分析了可能影响其分断的因素,为后期直流混合断路器的搭建与试验提供了可参考的依据。In a DC transmission system,arc quenching is a dramatic challenge due to lack of zero crossing of current.In order to achieve the purpose of breaking the circuit breaker quickly when the DC transmission fails,a new hybrid DC circuit breaker topology was designed based on zero current breaking.The topology can not only cut off the fault current quickly to extinguish the arc,but also solve the problem that an additional charging circuit needs to be added to the pre-charging capacitor when the hybrid circuit breaker is broken based on the tradition-al forced commutation principle.The working principle of the proposed topology was introduced in detail.The simulation model of the hybrid DC circuit breaker was established for the DC system with voltage rating of 400 V.The simulation results verify that the circuit breaker can quickly break the DC fault current.After that,the cur-rent transfer characteristics were simulated for different external circuit parameters and transfer branch parameters,and the factors that may affect their breaks were further analyzed,which provides a reference for the construction and test of DC hybrid circuit breaker.

关 键 词：直流输电线 混合式断路器 拓扑结构 仿真模型 电流转移特性 

分 类 号：TM561[电气工程—电器]