双向强迫换流型直流限流断路器的分析与设计

发布时间：2018-04-27 15:31

本文选题：限流断路器 + 强迫换流　；参考：《中国电机工程学报》2017年09期

【摘要】：针对强迫换流型限流断路器分断双向高上升率短路电流时关断电流的分流问题及其在关断额定及小电流时存在的过大冲击和需要判断电流方向等问题,该文提出一种新型的双向强迫换流型直流限流断路器方案,对故障电流和额定及小电流的关断分别采用不同的触头驱动模式和不同关断电路。分析电弧电压、真空开关支路及二极管支路分布电感对关断电流分流的影响规律,得到保证关断电流全部用于反向关断真空开关的约束条件及设计方法。设计900V/1kA断路器样机并完成额定和短路分断试验,可将初始上升率约为22A/ms的短路电流限流至10.9kA,分断时间小于1ms,分断额定电流时关断脉冲电流仅为1700A。试验结果表明,所提出方案的有效、可行和分析准确、可信。
[Abstract]:In view of the shunt problem of switching off current during breaking bidirectional high rise rate short circuit current of forced commutation current limiting circuit breaker and the problems of excessive impact and need to judge the direction of current when the rated and small current are turned off, etc. In this paper, a new type of bi-directional forced commutation DC current limiting circuit breaker is proposed, which uses different contact driving modes and different turn-off circuits for fault current, rated current and small current respectively. The influence of arc voltage, vacuum switch branch and diode branch inductance on the shunt of turn-off current is analyzed, and the constraint conditions and design method are obtained to ensure that all turn-off current is used in reverse turn-off vacuum switch. The prototype of 900V/1kA circuit breaker is designed and the test of rated and short-circuit breaking is completed. The short-circuit current whose initial rise rate is about 22A/ms can be limited to 10.9kA, the breaking time is less than 1 Ms, and the turn-off pulse current is only 1700A when the rated current is broken. The experimental results show that the proposed scheme is effective, feasible, accurate and reliable.
【作者单位】：海军工程大学电气工程学院;
【基金】：国家自然科学基金项目(51377166) 海军工程大学自然科学基金项目(HGDYDJJ15007)~~
【分类号】：TM561

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