摘要
基于快速闭合开关在中压大电流下的工作需求,提高真空触发开关的应用电压等级,设计了一种大容量的40.5 k V真空触发开关。为了满足80 k A峰值电流的通流能力,该开关采用了多棒极型的主电极结构设计以增加开关的通流面积并提高开关的电气寿命。针对40.5 k V系统的绝缘要求,对电极结构进行了倒角优化。选取了合适的屏蔽罩尺寸,改善了开关内部电场的分布,提高了开关的绝缘性能。针对设计的开关,设计了触发系统,该系统可以稳定输出50 k V的脉冲电压和3 k A的触发电流,保证可靠触发开关。设计的样机通过了峰值80 k A,脉宽15 ms的短路电流试验,工作寿命20次,触发时延<15μs;短路电流试验前后进行了工频耐压试验和雷电冲击试验,试验结果表明开关具有较高的绝缘水平。
To meet the demands of fast closing switch under medium voltage and high current circumstances, a 40.5 k V triggered vacuum switch of high current capacity is designed for medium voltage level application. To meet the need of 80 k A peak current capacity, the switch is applied with multi-rod system to enlarge its burning area so as to increase its working lifetime. To meet the demands of 40.5 k V insulation, the electrode is chambered and a shield is designed to improve the electric field distribution in the switch and its insulation level. A trigger system is designed for the switch with output of 50 k V pulse voltage and trigger current of 3 k A to reliably trigger the switch. The prototype of the designed switch has passed the test of short current impulses of 80 k A peak and 15 ms width for 20 times with trigger delay less than 15 μs. The switch has also passed the withstand power frequency withstand test and the lightening impulse withstand test before and after the short current test while maintaining its high insulation level.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2016年第6期1760-1766,共7页
High Voltage Engineering
基金
国家自然科学基金(510070208)~~
