电气化铁道无功治理的可控电抗器应用研究

综合治理电气化铁道的谐波和无功均要求动态补偿无功功率。本文提出了一种带磁分路的变压器式可控电抗器的静止动态无功补偿器的新模型。在该可控电抗器次级侧设置若干组绕组,每组绕组用反并联晶闸管控制其导通程度,可连续调节可控电抗器的感性无功功率,配合滤波兼补偿的滤波支路,从而实现无功功率的动态补偿。该方法能使可控电抗器产生的谐波电流小,次级侧的电压低,有利于应用电力电子器件的工程实施等。实验表明,设计出的可控电抗器具有良好的动态无功功率补偿性能。

Application Study of Adjustable Reactor for Reactive Power Compensation of Electrified Railways

The composite compensation of harmonic and reactive power of electrified railways needs reac-tive power dynamic compensation.This paper proposes a new model of static var compensator,which is based on magnetic shunt transformer-adjustable reactor.Set some electrical windings in secondary winding of the trans-former-adjustable reactor,using anti-parallel thyristor to control conduction angle in each winding,the inductive reactive power can be smoothly regulated,and with the filter reactor-capacitor circuit,the dynamic compensation of reactive power would be available.This method has small harmonic current and low voltage of secondary wind-ing of the transformer,which is extremely advantageous to the engineering operating of power electronic devices.The designed adjustable reactor has fine performance of reactive power compensation.