基于对称分量法的三相电路谐波和无功电流检测新方法  

A New Detecting Method for Harmonic and Reactive Current Based on the Method of Symmetric Parts

作　　者：王丽[1] 刘会金[1] 

机构地区：[1]武汉大学电气工程学院,430072

出　　处：《电气应用》2005年第10期139-141,147,共4页Electrotechnical Application

摘　　要：提出一种基于对称分量法的谐波和无功电流检测新方法。首先将三相电路作为三个单相处理,分别检测出各相电流基波有功分量和基波无功分量的幅值,由对称分量法推导出三相电流正序基波有功分量和正序基波无功分量幅值与各相电流基波有功分量和基波无功分量幅值的关系。而三电流正序基波有功分量分别与该相电网电压同相,正序基波无功分量与该相电网电压垂直,从而可以根据补偿目的直接组合出所要求的电流量。A new detecting method for harmonic and reactive current based on the method of symmetric parts is presented. The three-phase circuit is processed as three sing-phase circuits, the amplitude of active component and reactive component in fundamental current in each circuit is detected firstly. Secondly, the positive fundamental active and reactive components of three-phase currents are derived by the method of symmetric parts. As the positive fundamental active component is parallel to the system voltage, and the reactive component is orthogonal to the system voltage, the expectative current could be made up directly to satisfy the compensation purpose

关 键 词：谐波 无功电流 对称分量法 基波电流 

分 类 号：TM935[电气工程—电力电子与电力传动]