基于相位补偿的高频Vienna整流器解耦控制方法

针对三相三线制Vienna整流器控制频率与输入电压频率比值较低时dq轴耦合加剧的问题，采用了基于复系数传递函数的方法，推导了Vienna整流器电流环的开环传递函数。在同步旋转坐标系下，建立了考虑数字控制延时后的电流环复系数控制模型。对该模型的分析与研究表明，考虑数字控制延时后，传统电流前馈解耦方法不能实现完全解耦。为解决此问题，提出了一种带相位补偿的电流前馈解耦控制方法。该方法将输出的控制信号乘上延时对应的相位补偿量后作为新的控制信号，以消除延时对控制环路的影响，有效提高电流环的性能。最后搭建了1000W的Vienna整流器仿真与实验平台进行验证。仿真与实验结果证明了所提控制策略的有效性。

Decoupling Control Method for High-frequency Vienna Rectifier Based on Phase Compensation

AAiming at the problem of increased dq axis coupling when the ratio of the control frequency to the input voltage frequency of the three-phase three-wire Vienna rectifier is low, the method based on the complex coefficient transfer function is adopted to derive the open-loop transfer function of the current loop of the Vienna rectifier. In the synchronous rotating coordinate system, a complex-coefficient control model of the current loop considering the digital control delay is established. The analysis and research of this model show that the traditional current feedforward decoupling method cannot achieve complete decoupling when considering the digital control delay. To solve this problem, a current feedforward decoupling control method with phase compensation is proposed. In this method, the output control signal is multiplied by the phase compensation amount corresponding to the delay as a new control signal to eliminate the influence of the delay on the control loop and improve the performance of the current loop effectively. Finally, simulation and experimental platforms of 1000W Vienna rectifier was built for verification. The simulation and experimental results prove the effectiveness of the proposed control strategy.