基于瞬时无功功率理论的串联混合型单相电力有源滤波器

本文介绍一种串联混合型单相电力有源滤波器。首先与无源滤波器及并联型有源滤波器对比，分析了其补偿原理和特点。随后，介绍了其主电路结构及各部分功能。在对三相电路瞬时无功功率理论的思想进行扩展的基础上，得到了单相电路谐波电流的瞬时检测方法。对实现这于检测方法的基于ＤＳＰ微处理器的数字控制电路的结构和工作过程也作了简要介绍。仿真和实验结果表明，该检测方法是有效的基于此检测方法的串联混合型单相电力有源滤波器

Hybrid Type Series Active Power Filter Used in Single-phase Circuit Based on Instantaneous Reactive Power Theory

So far most of the active power filters are connected to the line in parallel, and are used in three - phase circuit.This paper introduces a hybrid type series active power filter used in single-phase circuit. The system configuration is presented and its compensation principle is discussed comparing with passive filter and shunt active filter. It keeps most of the advantages of shunt active filter and overcomes some drawbacks. As for control circuit, a novel detecting method for harmonic current in single-phase circuit is introduced in detail,viewed as an extension of the idea of instantaneous reactive power theory in three-phase circuit. And the configuration of the control circuit based on a DSP processor is briefly shown. Finally the simulation and experimental results are presented,verifying that the proposed detecting method is valid and the introduced filter has good filtering characteristics.