一种低压有源电力滤波器设计

Active Power Filter Design for Low Voltage Distribution System

面向电网谐波的治理,研发了一种基于瞬时无功功率理论的有源电力滤波器。采用TMS320F2812作为控制核心,使用IGBT作为开关器件,通过产生与负载谐波电流次数相等、幅值相等但相位相反的补偿电流注入电网,降低电网侧的谐波含量,并减少谐波源负载对相邻设备的高频电磁干扰,同时补偿一定的无功功率。配电系统实测表明,所研发的基于瞬时无功功率理论的有源电力滤波器投运后,大幅度减少了配电系统中的谐波含量,并有效修正了电压波形。

An active power filter is designed for harmonic governance based on instantaneous reactive power theory. TMS320F2812 is used as the controller core and IGBT is employed as switching devices. By generating compensation current which has the same amplitude and opposite phase to the harmonic current caused by nonlinear loads and then injecting it into the grid,the content of the harmonic current and voltage of the grid side and the frequency electromagnetic interference to neighboring devices are reduced. Meanwhile,some reactive compensation is also done by the APF. Test on the real distribution system shows the proposed active power filter could reduce the harmonic content and adjust the voltage waveform on the grid side of the distribution system effectively.