一种基于改进型电流检测的三电平有源滤波器的控制研究  

Research on Active Power Filter with a Three-level Inverter Based on Improved Current Detection

作　　者：孙华[1] 张晓[1] 李成君[1] 孔令军[1] 

机构地区：[1]中国矿业大学信息与电气工程学院,江苏徐州221008

出　　处：《低压电器》2011年第8期31-35,共5页Low Voltage Apparatus

基　　金：中国矿业大学中央高校基本科研业务费专项基金(2010ZDP1A10)

摘　　要：为提高三电平有源滤波器的动态补偿性能,针对传统的检测方法在三相电压不对称或畸变时存在的不足,提出了一种新的基于无锁相环、同步坐标变换的检测方法。该方法能够实时检测出不对称电路中的基波正序无功电流和谐波电流,理论推导也验证了所提检测方法的正确性。针对三电平逆变器固有的直流侧电压波动问题,给出了一种改变小矢量作用时间的控制方法,通过SimuLink仿真验证了检测方法和控制方法的有效性。In order to improve the dynamic compensation performance of the active power filter（APF）,a new detection method was proposed for harmonic and reactive currents,limtations of some existing deteeting methods for reactive and harmonics currents in the case of unbalanced or distorted three-phase voltaged was discussed.The the-oretical analysis verified the correctness of the proposed detection method.Meanwhile,the inherent problems of three-level inverter was discussed and a new control method was proposed.The simulation results validated that the performance of the proposed approach and detection method was effective.

关 键 词：电流检测 三电平逆变器 有源滤波器 同步坐标变换 

分 类 号：TM713.8[电气工程—电力系统及自动化]