并联型有源电力滤波器控制方法的统一描述及对比研究

并联型有源电力滤波器控制方法的统一描述及对比研究

本文研究有源电力滤波器的控制方法。首先对比研究了串联型和并联型有源电力滤波器的常见控制方法。然后提出一种将并联型有源电力滤波器控制为电压源的控制方法，称为电压模式控制。之后，与传统的电流模式控制方法进行了比较，发现电流模式控制是电压模式控制的一种特例，直接控制变流器的输出电压更一般。进一步提出并联型有源电力滤波器控制方法的统一描述，分析了控制方法有效的必要条件，并系统化地推导出几种新型控制方法。仿真和实验证明了推导的新控制方法的有效性。
Abstract: This paper discusses a systematic method to analyze and design the control of parallel active power filters (PAPF). The discussion begins with the comparison of popular control schemes for series and parallel active power filter.Then a new voltage-mode control scheme for PAPF is proposed and compared with current-mode control scheme. With
comparison, the voltage-mode control is found more general than current-mode control, which stimulated further study of a
general expression of the control methods, and leads to a systematic analysis and design method. In a view of the whole
system, a general control diagram is proposed to express any linear control method based on current detection. With different
gains of detected current, different control scheme can be obtained. Although the gain of each current has many options, only
four typical kinds of gains are discussed for simplicity, and then all 64 possible control schemes are obtained from the general control diagram. To verify their validity, necessary conditions are proposed, with which several new voltage-mode control schemes are derived in a systematic way. Their validity is verified by both time-domain computer simulations and experimental tests on hardware prototypes.
关键词﹕谐波补偿；有源电力滤波器；电压模式控制；电流模式控制；
Keywords: Harmonics Compensation; Active Power Filter; Voltage-Mode Control; Voltage-Mode Control