基于DSP和滑模变结构控制的三相三线有源电力滤波器

针对滑模变结构控制方法在有源电力滤波器中的应用问题，提出了基于DSP的有源电力滤波器的谐波和无功电流实时检测方法，建立了三相三线有源电力滤波器电流控制回路数学模型，提出了滑模变结构控制方法，对该控制策略下三相三线有源电力滤波器的控制性能进行了分析，该方法跟踪的快速性好，系统的稳定性好，具有良好的纠偏能力。给出了基于该检测和控制方法的有源电力滤波器的仿真和实验结果，结果证明了该方案应用于有源电力滤波器的正确性和可行性。

A three-phase three-wire active power filter based on DSP and sliding mode control strategy

Aiming at the problem of sliding mode control strategy application in the active power fdter, a real-time harmonic and reactive currents digitalization detection method based on DSP in active power filter is proposed. The mathematic model of current control loop in three-phase three-wire active power filter is established, and sliding-mode control strategy of current control loop is deduced. The current tracking error can be reduced quickly and chattering can be reduced effectively under the proposed sliding-mode control strategy. The proposed control strategy can provide both robustness response and a good dynamic response of the current tracking control, and has the characteristics of simple computation and easy application. The control performance under the proposed control strategy is analyzed. The simulation and experiment results show its validity and feasibility.