摘要
为了提高三相四开关并联型有源电力滤波器(active power filter,APF)的性能,提出一种基于比例积分-并联矢量比例积分(proportional-integral and vector proportional integral,PI-VPI)电流控制器的网侧电流直接控制方法。通过采用网侧电流直接控制方法,省去了对负载电流和APF输出电流的检测,不但可以减少电流传感器的使用,而且可以降低谐波电流检测精度对APF补偿效果的影响;并将PI-VPI控制引入到电压、电流的双闭环控制策略当中,以提高谐波补偿的精度。实验证明该方法可以将电网电流谐波总畸变率降至5.38%左右,而且具有较快的响应速度。
To improve the performances of three-phase four-switch active power filter （APF）, a direct control method of grid current based on PI-VPI of current controller is proposed. The control strategy directly detects the supply currents, eliminating the detection of the load current and the output current of APF. Therefore, not only current sensors can be re- duced, but also the performances of APF are no longer affected by the detection accuracy of the harmonic currents. Meanwhile, to improve the compensation accuracy of APF, proportional-integral （PI） and vector proportional-integral （VPI） control is introduced to the voltage and current double closed-loop control strategy. The experimental results show that the total harmonic distortion（THD） of power grid can be reduced to 5.38% by the strategy, and the method has a fast- er response speed.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2016年第1期56-62,共7页
High Voltage Engineering
基金
国家自然科学基金项目(51307076)~~
