有源电力滤波器全数字控制器

All-digital controller of active power filter

有源电力滤波器(APF)控制器是APF的关键部分,决定了APF的性能指标和补偿效果。提出一种新的多环控制策略和控制器结构,控制器由4个控制环组成,分别实现谐波抑制和无功补偿控制、抑制电网与有源滤波器高频振荡、有源滤波器的直流母线电压控制。设计了一种基于数字信号处理器(DSP)、现场可编程门阵列(FPGA)和复杂可编程逻辑器件(CPLD)芯片的全数字控制器,详细阐述了控制器的硬件电路及软件设计。实验结果表明,该装置滤波和无功补偿效果较好,而且这种控制器的实时性和精度比较高。

The key problem of active power filter （APF） is the control device, which determines the performance and compensating effect of APF. A novel multiple-loop control strategy and controller structures are also put forward. The control device consists of four control loops, which are contributed to achieve harmonic suppression and controlling reactive power compensation, suppress high frequency oscillation between the supply and the active power filter, control DC bus voltage of APF, respectively. An all-digital control device based on DSP, FPGA and CPLD is designed, and the hardware circuit and software design are described in detail. The test results show that it is good in performances and in harmonics elimination, reactive power compensation. In addition, this device has good Real-time performance and precision.