有源电力滤波器的无差拍控制应用研究

摘要

Active power filter is a common equipment for harmonic control. PWM convertor control is the key part of active power filter. Among numerous of control methods, space vector pulse width modulation(SVPWM)is widely used due to its high voltage utilization and good control precision, but time delay is inevitable because of the large amount of computation. The time delay can be eliminated effectively by deadbeat control, but the premise is that the next moment command current should be pre⁃dicted accurately. To reduce calculation quantity and improve prediction accuracy, a new and simple current prediction method is proposed. The new method was simulated by Matlab simulation software, and the hardware experiment was implemented by hardware platform. The simulation results and experiment results verified that the new method is feasible.%有源电力滤波器是谐波治理一种常用的设备，PWM变流器控制是有源电力滤波器的关键部分。在众多控制方法中，空间矢量脉冲宽度调制由于有较高的电压利用率和控制精度而广泛应用，但是由于运算量较大而产生的延时是不可避免的。利用无差拍控制能够有效消除延时，但前提是需要准确预测出下一时刻的指令电流。为了减少计算量，电流预测方法通常采用简便的方法，为了提高预测精度，提出一种新的预测电流方法。通过仿真软件Matlab对新方法进行仿真并利用硬件平台进行硬件实验，仿真结果和实验结果都验证了新方法的可行性。