线电压补偿型动态电压恢复器补偿策略  

Compensation Strategy of Dynamic Voltage Restorer via Line Voltage Compensation

作　　者：吕文亭 黄本润 

机构地区：[1]海军91991部队 [2]海军92557部队

出　　处：《电力系统及其自动化学报》2014年第8期81-84,共4页Proceedings of the CSU-EPSA

摘　　要：基于三相三线制电网系统的动态电压恢复器DVR通常采用线电压补偿方法。当电网电压跌落超过直流侧电压的1/2时,动态电压恢复器不能把负载电压补偿至正常范围。文中在常规补偿方法基础上,利用该系统中点电位可以浮动的特点,在原来补偿电压上叠加零序分量,并通过补偿电压的范围选择不同的零序分量,该方法可以使补偿电压的范围增加1倍。最后通过仿真验证了该方法的有效性。Dynamic voltage restorer （DVR）, which is based on the three-phase three-wire grid system, generally adopts line voltage compensation. When the voltage drop surpasses 1/2 of the DC voltage, DVR cannot compensate the load voltage to normal level. Since the neutral point voltage is variant in the three-phase three-wire grid system, the viable method is to add zero sequential component to the original compensation voltage of every phase, and different zero sequential component can be selected according to the range of compensation voltage. The method can double the range of compensation voltage. Finally, the simulated analysis results denote that the algorithm remarkably enhances the compensatory capability of DVR.

关 键 词：动态电压恢复器 电压跌落 三相三线制系统 线电压补偿 零序电压 

分 类 号：TM761[电气工程—电力系统及自动化]