一种用于电气化铁道无功补偿的可控电抗器

A Controllable Reactor for Reactive Power Compensation of Electrified Railways

提出一种可以与固定电容器并联运行,能够根据负荷的动态变化自动调节牵引变电站无功功率的可控电抗器。该可控电抗器在二次侧设置多个绕组,分别连接双向晶闸管与电压源型逆变器,通过对晶闸管的分级投切与逆变器电流控制实现电抗的大范围连续变化,从而完成对无功功率的调节。仿真与试验证明,该可控电抗器具有响应速度快、补偿精度高、谐波输出低等优异性能。

A novel controllable reactor is proposed to regulate reactive power of traction substations automatically according to dynamic loading by paralleled with fixed capacitors.This controllable reactor which has multiple second windings connected with anti-parallel thyristors and voltage-source inverter（VSI） respectively,can obtain reactance varying in a wide range continuously by step-switching the thyristors and controlling VSI current,so that implement reactive power adjustment.Simulating and experimental results validate the advantages of the presented reactor such as fast response speed,high compensating precision and low harmonic output et al.