有源电力滤波器数字控制系统设计与数字锁相算法实现

给出以DSP芯片TMS320F2812和AD7656芯片为主来建立有源电力滤波器数字控制系统的方案,提出基于三角函数正交性和DSP实现的APF锁相算法,给出算法的原理框图,该算法具有精度高、抗干扰能力强的特点。给出锁相和APF补偿的实验结果,谐波和无功电流成分经过APF补偿后得到了很好的补偿。实验验证本文算法的正确性和本文数字控制系统的方案的可行性。

The Digital Control System of Active Power Filter and It＇s Digital Phase-lock Algorithm

A digital control system of Active Power Filter （APF） with high sampling and controlling precision based on TMS320F2812 and AD7656 is proposed.A real-time digitalization method with high-accuracy and quick detection on power fundamental wave＇s phase in active power filter is proposed.A digital phase-lock control loop （PLL） is constructed based on the principle of trigonometric function orthogonality,the proposed method is a high-accuracy,fast and robust detection method,the experiment results of the proposed digital PLL method and APF are presented,the harmonic and reactive currents can be compensated very well,the experiment results show its validity and feasibility.