三相四线制电路中的瞬时无功功率及有源电力滤波器

Instantaneous Reactive Power and Active Power Filter in Three-phase Four-wire System

讨论了在三相四线制系统中瞬时无功功率理论和有源电力滤波器的研究结果。给出了三相四线制系统中瞬时功率、瞬时有功、瞬时无功以及零序功率的表达式以及在α β 0坐标系下的关系式 ,解释了各瞬时功率之间的物理关系。在此基础上 ,研制了一台用于三相四线制有源电力滤波器的实验装置。给出了系统的基本补偿原理、主电路及控制电路结构。并利用该装置进行了补偿实验 ,结果表明 ,该装置可对三相四线制系统中的谐波、负序。

In this paper,instantaneous reactive power theory using in three phase four wire system was discussed at first And then appears an active power filter device The compensation principle and the structure of main control circuits are given The basic operation principle of the active power filter is analyzed,which is different from that of active power filter used in three phase three wire system The experiment results prove the effectiveness of the proposed control method and indicate that active power filter has a good compensation characteristics