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针对单相四象限变流器基于坐标变换双闭环控制方法的不足,通过建立旋转坐标系下的数学模型,提出了基于电流状态反馈和预测电流控制的改进算法及实现方案,该控制方法不仅可以实现网侧电流有功分量和无功分量的准确控制,同时具有良好的动态响应能力。采用仿真软件搭建了系统模型并进行计算,对2种控制方法进行比较和验证。仿真结果表明,改进的控制方法能够保证单相四象限变流器的稳定工作,并且具有更好的动态响应。
Aiming at the shortcomings of single-phase four-quadrant converter based on the double closed-loop control method of coordinate transformation, an improved algorithm based on current state feedback and predictive current control and its realization scheme are proposed by establishing the mathematical model under the rotating coordinate system. The control method not only It realizes accurate control of active and reactive components of grid-side current, and has good dynamic response capability. The system model was built by simulation software and the two kinds of control methods were compared and verified. The simulation results show that the improved control method can ensure the stable operation of single-phase four-quadrant converter and has better dynamic response.