一种实用的基于基波磁通补偿的串联混合型有源电力滤波器

推导了基于变压器基波磁通补偿的串联混合型有源电力滤波器的新原理 ,得出当串联变压器二次侧注入的基波电流和电网电流的基波成分满足基波补偿条件时 ,则串联变压器可以实现对基波呈现很低阻抗 ,而对谐波呈现很高的励磁阻抗。对该有源电力滤波器的电流控制方式进行了仿真。通过采用电流型谐波源进行接近实用化的实验 ,证明了该原理的正确性并取得了极好的补偿特性

A Practical Series Hybrid Active Power Filter Based on Fundamental Magnetic Flux Compensation

A practical series hybrid active power filter based on the fundamental magnetic flux compensation of the series transformer is analyzed.In the active power filter,a series transformer is chosen with its primary winding is connected in series between the power utility and harmonic producing loads.The compensating fundamental current proportional to the fundamental component of the utility current is injected to the secondary winding of the series transformer.When the injected fundamental current and the fundamental current of the power utility satisfy the fundamental magnetic flux compensation condition,the series transformer can really exhibit very low impedance at the fundamental frequency and high magnetizing impedance at harmonics frequencies.And the current control strategy is simulated.The validity of the heory and excellent compensation characteristics are verified by a large rated prototype.