基于直接功率控制法的并联型有源电力滤波器故障容错方法  

A fault-tolerance method of shunt active power filter based on direct power control

作　　者：李国华[1] 汪玉凤[1] 高小朋[1] 张立[1] 张林伟[1] 

机构地区：[1]辽宁工程技术大学电气与控制工程学院,辽宁葫芦岛125105

出　　处：《煤炭学报》2014年第12期2544-2549,共6页Journal of China Coal Society

基　　金：国家自然科学基金资助项目(51307076)

摘　　要：提出一种基于直接功率控制法的并联型有源电力滤波器(active power filter,APF)故障容错方法。通过预测APF输出电压的参考值,并利用空间矢量脉宽调制法(space vector pulse width modulation,SVPWM)控制实际输出的电压跟踪参考值,以保证APF的瞬时功率跟踪参考功率,从而实现直接功率控制。当APF主电路中的开关器件发生故障时,利用故障状态下的4个有效电压矢量合成获得参考值。矢量合成中采用一种七段式细分方式,给出了不同扇区内电压矢量的作用时序和作用时间。该方法能够保证APF在故障状态下继续稳定工作,从而显著提高其工作可靠性。仿真和实验结果证明了该方法的有效性。A fault-tolerance method of shunt active power filter（ APF） based on direct power control was proposed. In order to make instantaneous power track on reference value,it calculated the reference voltage value of APF by predictive control,and the output voltage would track the calculated reference value by space vector pulse width modulation.When the power electronic devices were damaged,the voltage vector synthesizing algorithm based on the available voltage vectors was chosen as an equivalent alternative by a method of voltage space vector modulation with seven-segment scheme. The sequence and time of the four voltage vectors in different regions were given. Thus the harmonic would be compensated by APF in fault state. It would improve the reliability of APF. The simulation and experimental results demonstrate the validity and efficiency of the proposed method.

关 键 词：有源电力滤波器 故障容错 直接功率控制 空间矢量脉宽调制法 

分 类 号：TD611[矿业工程—矿山机电] TM71[电气工程—电力系统及自动化]