【摘要】 本文提出了一种新的级联式并联有源电力滤波器(CSAPF)的控制算法。传统的两电平拓扑结构的有源滤波器由于其功率开关耐压水平的限制,难以实现对高压大容量非线性负载的谐波补偿。在高压大容量传动系统中,H桥级联式逆变器得到了广泛的应用。然而,这种逆变器独立电容电压的不平衡问题限制了其在有源滤波领域的应用。本文针对这一问题设计了一种新的参考电流提取算法和电容电压平衡PWM算法。实验结果表明了所提出算法的正确性和有效性。更多还原

【Abstract】 In this paper a novel control scheme of cascade shunt active power filter (CSAPF) is presented. This work is motivated by the fact that the compensation ability of traditional active power filter is limited by the voltage capability of the power devices. While the converter with cascade topology has been put into practical use for years especially in high voltage and high power drives, the application of such converter to active power filter is hindered by the problem of voltage unbalance of separate DC capacitors that leads to system instability. This paper deals with the design and implementation of a new digital controller for CSAPF. Finally experimental results obtained from a laboratory system developed in this paper are presented to verify the viability and effectiveness of the proposed control algorithm.更多还原