交直流电压条件下TVS触发特性研究

Triggering Characteristics of Triggered Vacuum Switch under AC and DC Loads

通过试验得到了触发系统的触发能量、触发电压与真空触发开关(TVS)导通概率、触发时延及分散性的关系,试验结果可以作为高性能真空触发开关控制器的设计与应用的指导。触发点火回路采用陡化高压触发脉冲,使TVS的导通时延及其分散性显著降低。引入同步触发技术,控制TVS主间隙在交流外施电压峰值触发。重点比较主间隙施加交直流情况下的触发特性,在触发参数、交流电压峰值与直流电压值相等的条件下,直流情况下TVS的导通概率和触发稳定性明显高于交流情况,交流情况下对触发系统的要求更为苛刻。

The relationship between the triggering parameters, including the triggering voltage and power, and the triggering characteristics,such as the triggering-time delay, triggering probability, and scattering of the triggered vacuum switches （TVS） under AC and DC loads, were experimentally evaluated. The high-voltage pulse,generated by the main high-voltage circuit, is capable of considerably shortening the triggering-time delay, and reducing the scattering of the TVS; and the synchronous triggering technology make it possible to control the triggering phase at the peak of the external AC voltage at the main gap of the TVS. With the identical triggering parameters,and with the AC voltage amplitude being equal to DC voltage, the triggering probability and stability of the DC loaded TVS were found to be much better than those of the AC loaded TVS. Triggering of the AC loaded TVS needs more stringent requirements.