适用于电缆振荡波检测系统的电磁触发式固体开关  

Electromagnetic Triggered Solid-state Switch for Damped AC Voltages Test System

作　　者：江军[1,2] 罗定平[1,2] 马国明[1,2] 李成榕[1,2] 李庆民[1,2] 王伟[1,2] 

机构地区：[1]华北电力大学新能源电力系统国家重点实验室,北京102206 [2]华北电力大学高电压与电磁兼容北京市重点实验室,北京102206

出　　处：《高电压技术》2014年第5期1491-1498,共8页High Voltage Engineering

基　　金：国家重点基础研究发展计划(973计划)(2009CB724508);国家自然科学基金(51307052);中央高校基本科研业务费专项资金(13XS03)~~

摘　　要：已有电缆振荡波检测系统中的高压开关存在体积过大、结构复杂、有信号干扰等方面的不足。为此,研制了适用于电缆振荡波装置的基于电磁触发方式的高压固体开关。通过使磁环具有多个次级输出结构、进行环形布置和整体灌封,减小了开关体积;采用单根触发线传递脉冲宽度调制信号,实现了高压固体开关通断拓扑结构的控制,降低了高低压间的绝缘需求,提高了结构的可扩展性;采用电容放电维持高压固体开关的导通,避免了电磁干扰,提高了局部放电检测装置的灵敏度。试验结果表明,所研制的高压固体开关体型小巧,开通时间约为400 ns,局部放电起始电压>30 kV。将该固体开关用于多条故障电缆中进行局部放电测试,均能完成有效检测。The high voltage switches in existed cable oscillation-wave detection system have certain disadvantages such as large size, complex structure, and signal interference, etc. Therefore, we developed a high-voltage solid-state switch based on an electromagnetic trigger method for cable oscillation-wave devices. Volume of the proposed switch is limited by adding multiple secondary output structures of magnetic ring, using circular arrangement and whole potting. Moreover, the on-off-topology structure of solid-state switch is controlled by using pulse width modulation signals transferred by a single trigger line. This reduces the requirements of insulating high-voltage and low-voltages parts, and improves the structure in its extensibility. In addition, the switch is remained turned-on by capacity discharge, which avoids the most electromagnetic interference and increases the sensitivity of partial discharge（PD） detection devices. Test results show that, the proposed high-voltage solid-state switch is small in its volume, and has conduction time of 400 ns and PD inception voltage over 30 kV. Furthermore, the switch has been successfully utilized in multiple PD detection tests of various fault power cables.

关 键 词：电磁触发 电缆振荡波装置 局部放电 故障模型 电磁干扰 高压固体开关 

分 类 号：TM564[电气工程—电器]