可选择谐波型有源电力滤波器的闭环控制和实现

Closed-Loop Control Method and Implementation of Selective Harmonic Type Active Power Filters

在可选择谐波型有源电力滤波器的基础上,着重分析谐波电流和逆变器直流侧电压闭环控制方法的控制要点和实现要点,在检测环节中加入相位补偿角以补偿系统的检测环节和电流闭环中固有的时延影响等。最后给出了控制器为DSPTMS320F2812的系统构成以及仿真和实验结果,验证了所提出的谐波检测以及电流和直流侧电压闭环控制方法的正确性。

In 2001, we proposed a kind of active power filter, named selective harmonic type active power filter （SH-APF） and shunted on the load side. Because the higher harmonic currents can be damped by the impedance of the power line, we have shown that SH-APF can concentrate on compensating lower harmonic currents and then can improve the effectiveness and precision of the compensation. In this paper, we analyze the key points of the system implementation, such as the harmonic current detection method, the closed-loop control methods of compensating currents and DC voltage, and the compensation of the time delays which are introduced by the harmonic detection unit and the control loops. The construction of the controller is introduced. The results of simulation and experiment of SH-APF are given and the several performance are compared with conventional one which detects and compensates all harmonic currents.