煤矿电网的无功冲击与瞬态补偿

大容量可控硅负载投入煤矿电网,日渐增加。无功冲击引起电网电压波动、电压闪变;高次谐波引起电网波形畸变,使设备运行失常、电机过热、能耗增加。因此,及时考虑投入比较完善的无功瞬态补偿已提到议事日程。本文针对这一情况阐述了可控硅对电网运行产生各种危害的机理及瞬变无功功率的快速补偿措施——采用静止式无功补偿装置(SVC)。对这种装置中的两种最适用的可控硅控制电抗器(TCR式)和可控硅控制变压器(TCT式)进行了论述。

Var shock and Instantaneous Compensation in Coal Mine Power Network

Load of power SCR has gradually been in troduced in mine power network.Var shock makes voltage fluctuation and flicker. Higher harmonic also causes waveform distortion, these make equipment overheated, run out of order and increased energy dissipation. So instantaneous compensation against vat shock is duly required; Paper describes the mechanism of harm produced and the rapid instantaneous reactive compensation used, including static vat compensator (SVC), thyristor controlled reactor (TCR) and thyristor controlled transformer(TCT).