基于电容谐波电流抑制的动态电压恢复器控制方法  

Dynamic voltage restorer control based on capacitor harmonic current suppression

作　　者：周卫平[1] 吴正国[1] 夏立[1] 李哲[1] 

机构地区：[1]海军工程大学电气与信息工程学院,湖北武汉430033

出　　处：《电力自动化设备》2013年第8期64-69,共6页Electric Power Automation Equipment

摘　　要：针对传统双环反馈控制方法在补偿非线性负载电压跌落时存在补偿精度不高和含有谐波的不足之处,在详细分析了非线性负载对动态电压恢复器补偿特性影响的基础上,提出了一种基于电容谐波电流抑制的新型控制方法。在检测出谐波电流后,通过控制动态电压恢复器产生反向谐波电流来抑制电容电流中的谐波成分,进而消除非线性负载对动态电压恢复器的不利影响。仿真和实验结果验证了所提方法能有效解决非线性负载的电压跌落问题。The compensation accuracy of traditional dual-loop feedback control is low when the voltage sag of nonlinear load is compensated and it contains harmonics. The influence of nonlinear load on the compensating characteristics of DVR（Dynamic Voltage Restorer） is explored and a control scheme based on capacitor harmonic current suppression is proposed,which controls DVR to generate an opposite harmonic current to suppress the harmonic components of capacitor current after the harmonic current is detected. The adverse influence of nonlinear load on DVR is thus eliminated. Simulative and experimental results show the viability and effectiveness of the proposed control scheme.

关 键 词：动态电压恢复器 双环控制方法 电容电流 谐波电流 谐波抑制 

分 类 号：TM761[电气工程—电力系统及自动化]