有源滤波器参考电流和电网电压的同步  

Synchronization of active filter current reference to the network

作　　者：王莉娜[1] 姜勇[1] 罗安[1] 

机构地区：[1]中南大学信息工程学院,湖南长沙410083

出　　处：《控制与决策》2002年第2期187-190,共4页Control and Decision

基　　金：湖南省重点攻关项目 (98JJY2 0 43)

摘　　要：提出一种并联型有源滤波器参考电流的测定方法 ,并推导出一种新的同步原理。通常的同步方法是基于检测电网电压过零点 ,由于电压信号对干扰很敏感 ,尤其在过零点附近 ,容易产生错误的同步脉冲信号 ,导致完全错误的参考电流。所提出的新方法在线检测电网电压和负载电流 ,并在线计算电源基波电压 ,不仅可完全补偿无功功率 ,抑制谐波电流 。An improved method to determine active filter current reference is presented. A new principle of synchronization is proposed. The common synchronization is based on net voltage zero-crossing detection. Since it is very sensitive to disturbances especially at the values close to zero, false synchronization pulses can be generated. The proposed method measures net voltage and load current, and calculates net voltage fundamental component on line. As a result, the whole reactive power can be compensated, the harmonic distortion is greatly attenuated and load current change can be quickly responded.

关 键 词：有源滤波器 参考电流 电网 电压 同步 电力滤波器 无功功率补偿 

分 类 号：TN713.8[电子电信—电路与系统] TM714.3[电气工程—电力系统及自动化]