【摘要】 介绍一种新型的用于补偿配电系统高次谐波的复合型有源滤波器。它能有效的抑制配电变压器附近设备产生的高次谐波。滤波器是由有源滤波器 (AF)和无源滤波器 (PF)串联组成。根据自动调整反馈放大系数K ,AF将根据高次谐波电阻的大小动作 ,从而实现控制。复式滤波器与通常的AF相比 ,能使PWM变换器的容量大幅度降低。因AF依电阻的正负而动作 ,能够有效减小流入PF中的高次谐波电流 ,从而避免了PF过负荷 ,经实验和仿真确认了PF的补偿效果更多还原

【Abstract】 A new type of hybrid active filter for damping of harmonic resonance in distribution systems is introduced,which can depress harmonic close by distribution transformer generating effectively.The filter is composed of an active filter(AF) and a passive filter(PF).The active filter is controlled to behave as a variable resistor by adjusting a feedback gain K automatically.By comparison with traditional active filters,the new filter can reduce the capacity of PWM convertors drastically.Because the active filter behaves according to the negative and positive value of resistors,it can reduce harmonic current flowing into PF effectively,which overload can be avoided.The compensating effect of passive filters is proved by experiment and simulation.更多还原