基于PR控制的船舶电网有源滤波器控制策略

Research on control strategy of active power filter based on PR control

针对同步旋转坐标系下的三相四线制LCL并联型有源电力滤波器控制技术的缺点,提出一种采用PR准比例谐振调节器的三相四线制LCL并联型有源电力滤波器的控制技术.该控制策略采用PR准比例谐振调节器控制三相四线制LCL并联型有源电力滤波器的电流输出,使三相补偿电流输出实时跟踪船舶上负载引起的谐波电流.针对PR准比例谐振调节器在谐振频率处有限增益导致的静差问题,定性地分析各个参数对三相补偿电流输出的控制精度与动态性能的影响并进行了MATLAB仿真实验.结果表明:采用三相四线制LCL并联型有源电力滤波器PR准比例谐振调节其控制,能够实现高精度电流补偿.

In this paper,the control technology of three-phase four wire system LCL parallel active power filter is studied. The control strategy is used to control the current output of LCL shunt active power filter with PR quasi proportional resonant regulator,which makes the output current of three-phase compensation current track the harmonic current caused by the load on the ship. In the light of the static difference problem of the PR quasi proportional resonant regulator,the influence of various parameters on the accuracy and the dynamic performance of the output of the three phase compensation current is analyzed qualitatively. The experimental results show that the control technology of three-phase four wire LCL shunt active power filter can achieve high precision current compensation and good dynamic performance.