基于MATLAB的有源电力滤波器研究

采用电流滞环跟踪控制方法，设计三相并联型有源电力滤波器，控制其产生预期的补偿电流。应用MATLAB的电力系统模块对整个有源电力滤波器进行仿真研究，能够实时、准确地检测电网中瞬态变化的谐波与无功电流，实现精确补偿，使电网电流得到改善。通过对电网电流、负载电流和有源滤波器的输出电流进行FFT分析，结果表明有源滤波器达到了预期的电流补偿效果，有效地抑制了电网谐波，显著改善了与电网连接处的电能质量。

STUDY OF ACTIVE POWER FILTER BASED ON MATLAB

With the current hysteresis tracking control method, a three-phase shunt active power filter was designed. It could control to produce the desired compensatory current. The simulation model of the filter was built through Power System Blockset of MATLAB. The simulation study was done to detect the harmonic grid transients and reactive current real-time and accurately. It was realized to make accurate compensation and improve the power grid current. The FFT analysis was done for the grid current, load current and active filter output current. Simulation results showed that the active power filter achieved the desired current compensation effect and effectively restrained harmonics. It significantly improved power quality of grid connection.