各相独立ip-iq法APF直流侧稳压策略研究

Research on DC Voltage Balance Control Strategy of APF Based on Separated-phase i_p-i_q Theory

有源电力滤波器(APF)是动态抑制谐波和无功功率的有效手段。谐波检测的快速性和精确程度决定了APF的补偿性能;同时直流侧电容电压的稳定是APF正常工作的前提。此处详细介绍了基于各相独立i_p-i_q谐波检测APF的实现方法;并提出一种适用于各相独立i_p-i_q法APF的直流侧电容电压控制策略,在进一步减少计算量的同时可以保证直流电压的平衡稳定。建立了三相三线制APF模型,并通过仿真和实验验证了各相独立i_p-i_q谐波检测法和所提直流侧电压控制策略的正确性。

The active power filter （APF） is an effective measure of dynamic harmonic suppression and reactive power compensation.The compensation performance of APF is determined by the real time and accurate performance of har- monic detection.Meanwhile,the stability of DC side capacitor voltage is the prerequisite for APF to work properly.The implementation method of APF based on separated-phase ip-iq theory is described.And a DC side capacitor voltage control strategy is proposed based on the separated-phase iv-iq APF which can further reduce the amount of calculation while ensuring the balance and stability of the DC voltage.The correctness of separated-phase ip-iq harmonic detection and proposed DC voltage control strategy is verified by the simulation and experiment.