基于无谐波检测三相四开关APF模型预测控制

Three-phase Four-switch APF Model Predictive Control Based on Harmonic Free Detection

提出一种基于无谐波检测技术的三相四开关并联有源电力滤波器(TFSAPF)模型预测控制(MPC),该控制取代了传统四开关逆变器空间矢量脉宽调制(SVPWM)算法,无需扇区判断和电压基矢量作用时间计算,避免了因母线中点电位偏移导致扇区误判断及合成零电压矢量存在误差。分析了传统SVPWM算法和MPC对系统的补偿效果,得出在预测允许误差范围内,提前预测两个采样周期的指令信号具有更好的补偿性能。新型控制方案省略了谐波检测相关运算,简化了调制算法。仿真结果验证了该方法的有效性与实用性。

A model predictive control （MPC） without harmonic detection technology based on three-phase four-switch shunt active power fiher（TFSAPF） is proposed to replace the traditional four switch inverter space vector pulse width modulation （SVPWM） algorithm, without sector judgment and voltage vector calculation time, avoid the bus midpoint potential offset caused by sector misjudgment and synthesis of zero voltage vector error.The compensation effect of the traditional SVPWM algorithm and MPC on the system is analyzed.It is concluded that the predictive signal with two sampling periods is better compensated in the prediction error range.The new control scheme omits the harmonic de- teetion correlation operation, simplifies the modulation algorithm, and the control is simple and effective.Simulation re- suits show the effectiveness and oraeticabilitv of the DrODosed method.