变压器有载调压晶闸管辅助切换开关的研究

Study of Thytistor Assisted Diverter Switch for On-load Transformer Tap Changers

本文介绍一种能实现快速切换,无过电压,无冲击电流,不中断线路变压器有载调压的晶闸管辅助变压器切换开关主电路,详细说明了消除变压器分接头切换过程中电弧和暂态过程的理论和方法,并给出了数值仿真结果。结果表明,根据本文介绍的晶闸管有载调压分接开关主电路和晶闸管门极触发脉冲时序,能确保变压器分接头切换时无冲击,线路供电不中断。

The main circuit used the thyristor assisted diverter switch for on-load transformer tap changers is presented in this paper. It can realize high-speed switching over, no-overvoltage, surgeless current and no-outage. The theory and method for eliminating the electric arc and transience which produced during the switcher over of transformer taps are described in detail. The result of numerical simulation show, based on the main circuit of thyristor tap switcher and the gate tripping impulse time sequence of thyristor shown in this paper, switching of the transformer tap switcher can be guaranteed against surge and outage.