电气化铁道的改进型静止动态无功补偿器  

Modified static var compensator of electrified railways

作　　者：郑宏[1] 李卫玲[2] 祁峰[1] 朱益华[1] 

机构地区：[1]江苏大学电气信息工程学院,江苏镇江212013 [2]机械工业信息研究院,北京100037

出　　处：《江苏大学学报（自然科学版）》2005年第2期170-173,共4页Journal of Jiangsu University：Natural Science Edition

基　　金：江苏省教育厅自然科学基金资助项目(04KJB470023);镇江市科技计划项目(SH2003013)

摘　　要：针对目前电气化铁道产生大量谐波及无功功率的现状,以及现有固定电容器式无功功率补偿方式常产生容性过补,与电网谐振、补偿装置自身过载及滤波效果差等问题,提出了一种基于变压器式可控电抗器的改进型静止动态无功补偿器的新模型.在带气隙的变压器二次侧设置若干组绕组,每组绕组用反并联晶闸管控制其导通程度,可平滑连续调节可控电抗器的功率.通过改变级间容量递增系数,从而实现无功功率的动态补偿.这种方法具有可控电抗器不饱和、产生谐波电流小的优点,变压器二次侧电压低,利于电力电子器件的长期可靠工程化运行.试验表明,设计出的模型具有良好的动态无功功率补偿性能.There are large harmonics and reactive power in current electrified railways. Moreover, the method of reactive power compensation with fixed capacitor usually has problems of capacity overcompensation, resonance with electric network, compensation device over-load, and lower effect of filter. A new model of modified static var compensator based on magnetic flux controlled adjustable reactor is proposed. Some electrical windings in secondary winding of a transformer with air gap, using double converter thyristor control conduction angle in each winding are set up. The power of adjustable reactor can be smoothly regulated. By changing each power step number, reactive power can be compensated in real-time. This method has merit of adjustable reactor unsaturated and small harmonic current, and lower voltage of secondary winding of the transformer, thus is extremely advantageous to engineering operating of power electronic device with long term reliability.

关 键 词：电气化铁道 无功补偿 可调电抗器 

分 类 号：TM461[电气工程—电器]