摘要
为了减小直流侧电压脉动对并联型有源电力滤波器(SAPF)补偿性能的影响,分析了补偿电流分解得到的谐波电流与直流侧电压脉动的关系,得到电容电压纹波的估算表达式。据此提出了一种适用于常用SPWM调制方式的电压环设计方法,即在经典PI控制基础上串入陷波器进行优化。按某一频率设计的陷波器减小了电压环输出在该频率的增益,使直流侧电压波动引起的干扰削弱,提升有源电力滤波器的补偿性能。仿真与实验结果表明该设计方法可以使有源电力滤波器的补偿效果明显改善,验证了本文理论分析和设计方法的正确性。
An analysis of relation between the DC link voltage ripple and harmonic current decomposed by compensated current is presented to reduce the impact on the compensative ability of shunt active power filter which caused by voltage ripple,and an expression for estimating capacitor voltage ripple is summarized.A voltage loop design is put forward for the common sinusoidal PWM（SPWM） modulation accordingly.Based on the classic PI control,it is optimized by notch filter which added to voltage loop.Interference caused by the DC link voltage ripple is weaken by notch filter which can reduce the gain of voltage loop output at a given frequency,therefore performance of SAPF compensation is improved.The results of simulation and experiment show that the proposed control scheme makes the active power filter achieve high performance compensation and verify the validity of the analysis and proposed method.
出处
《电子测量与仪器学报》
CSCD
北大核心
2015年第10期1529-1535,共7页
Journal of Electronic Measurement and Instrumentation
基金
国家自然科学基金(51177037)资助项目
关键词
直流侧电压控制
有源电力滤波器
脉动分析
电压环
陷波器
DC-side voltage control
active power filter（APF）
fluctuation analysis
voltage loop
notch filter
