各相独立的i_p-i_q法APF实现及其控制

Achievement and Control of APF Based on an Separated phase i_p-i_q Theory

有源电力滤波器(APF)是一种动态抑制谐波和无功功率的新型电力电子装置。对谐波和无功电流的实时准确检测,是提高其补偿精度和动态响应的关键技术之一。通过对各相独立的ip-iq算法进行详细的分析,提出了与改进算法相对应的直流侧电压控制方法。改进的算法中,锁相环的精确锁相是谐波检测的重要影响因素,采用了一种检测算法相适应的基于PI的锁相方法。基于上述理论,建立了三相3线制APF的模型,并进行了仿真和实验研究,仿真和实验结果验证了检测理论和控制方法的正确性和有效性。

The active power filter （APF） , a new power electronic device, is used as a dynamic harmonic suppression and reactive power compensation apparatus. The real- time and accurate detection to harmonic and reactive current is one of the key technologies to improve the compensation accuracy and dynamic response.A corresponded new DC-side bus voltage control method to the separated-phase ip-iq detection method was proposed after detailed analysis. Meanwhile, the accuracy of the phase-locked loop is an important factor of the harmonic detection, thus, a PI controller was applied to the PLL that adapt to the detection method. Based on the above- mentioned theory, a three-phase three-wire type APF mode and it＇s simulation was accomplished and the simulation consequent verifies the correctness and validity of the detection theory and control methods.