一种新型的并联混合型有源电力滤波器

提出一种新型的基于阻抗可控的并联混合型有源电力滤波器。通过对带气隙的线性变压器的电压方程分析得知，当变压器二次侧注入的补偿电流和一次侧的电流满足一定的补偿条件时，变压器对谐波电流呈现近似为零的低阻抗，对基波电流呈现连续无极可调的电抗。从而不仅能够有效地抑制谐波，与无源电力滤波器相结合，还能够实时补偿无功功率。针对该原理提出一种新型的指令电流运算方法。此新原理在高压交流电力系统柔性输电装置中将有着广阔的应用前景。实验结果证明此有源电力滤波器新原理的正确性。

Research on a Novel Shunt Hybrid Active Power Filter

A novel shunt hybrid active power filter based on controllable impedance is proposed.The secondary winding of a linear transformer with air gap is injected a compensation current produced by a voltage source inverter.According to the transformer's voltage equations,when certain compensation condition is satisfied,the transformer can really exhibit nearly zero impedance to harmonic current and continuously adjustable reactance to fundamental current.Thus,the proposed active power filter together with passive power filter can not only suppress harmonic current but also compensate reactive power.A new reference current operation method is also put forward.Active power filters implemented this principle can be used in high voltage alternate power systems. The validity of the new principle is verified by the experiment results.