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针对注入式混合有源电力滤波器(HAPF)实际应用过程中出现的电网基波和谐波电压致使有源部分分压过高并向其传送能量,从而与逆变器产生的电网谐波补偿能量相抑制形成能量脉动,并导致直流侧电压的波动乃至抬升的现象,建立了有源部分逆变器两侧的能量平衡数学模型,在此基础上提出了基于比例增益在线自调整结合递推积分的改进型PI控制器,控制有源部分吸收或释放一定的有功功率,结合检测注入支路回灌谐波电流控制逆变器产生与之相反的抑制电流来抑制能量脉动,然后联合电网谐波电流跟踪控制以获得系统参考信号。实验结果证明该方法能够有效抑制有源部分逆变器两侧的能量脉动,控制直流侧电压的稳定,从而提高了系统的滤波性能。
Aiming at the fundamental voltage and harmonic voltage of power grid in the actual application process of hybrid active power filter (HAPF), the active partial pressure is too high and transmits energy to it, and then the power grid harmonic compensation The energy phase is suppressed to form the energy pulsation, and the fluctuation of the DC voltage is caused or even lifted. A mathematical model of energy balance on both sides of the active partial inverter is established. Based on this, a self-adjusting and recursive combination based on proportional gain Integral improved PI controller controls the active part to absorb or release a certain amount of active power, combined with the detection of the injection branch to recharge the harmonic current to control the inverter to generate the opposite inhibitory current to suppress the energy pulsation. Then, Wave current tracking control to obtain the system reference signal. The experimental results show that the proposed method can effectively suppress the ripple of energy on both sides of the inverter and control the stability of DC voltage, which improves the filtering performance of the system.