多绕组变压器负载可控型可调电抗

为使可调电抗器能快速连续调节且不产生谐波,提出一种新的可调电抗原理:使用晶闸管和电压型PWM逆变器作为多绕组变压器二次侧负载,通过对晶闸管的开关控制和对逆变器输出电流的控制实现变压器一次侧等效阻抗的任意调节。晶闸管的开关控制实现可调电抗的粗调,从而晶闸管开关绕组占有可调电抗的主要容量;逆变器输出电流控制实现可调电抗的细调,逆变器输出绕组容量很小,从而降低了成本。实验结果表明该新型可调电抗器具备电感线性连续可调、谐波电流小的优良性能。

Adjustable reactor with controllable load of multi-winding transformer

A rapidly and continuously adjustable reactor with limited harmonic output is developed,which applies thyristors and voltage source PWM inverter as the secondary load of multi-winding transformer and controls the switching of thyristors and the output current of inverter to regulate arbitrarily the equivalent primary impedance of transformer.The thyristor switching control is used for coarse adjustment and the inverter output current control for fine adjustment.The capacity of thyristor switching winding is...