提出一种基于比例积分(PI)结合改进型比例谐振(PR)控制的空间矢量脉宽调制(SVPWM)的控制方法.传统变频电源一般采用基于PI控制的电压电流双闭环控制方法,但该控制在三相静止坐标系下跟踪正弦参考指令电流很难消除静态误差.而通过PR控制器可对特定频率下的交流指令进行无静差跟踪,将传统矢量控制下的有功和无功电流分量转换到静止坐标系下,避免了繁琐的计算.仿真和实验表明,通过此方法调节时,只需设置控制器谐振频率为电网电压基波角频率,即可实现基波电流无静差跟踪,比传统电压定向矢量控制方式更简单,且相较PI控制谐波含量小,电压畸变率明显降低,提高了控制系统的鲁棒性和电网电能质量.%A control strategy of space vector pulse width modulation (SVPWM) is proposed based on proportional integral(PI) control combined with improved proportional resonant(PR) controller.A method named with double closedloop control of voltage and current based on PI control is generally used in the traditional variable frequency power.However,the PI control is difficult to eliminate the static error by tracking the sinusoidal reference directive current in the three-phase static coordinate.Without tedious calculations,the PR controller could carry out static error free tracking with exchange instructions under the specific frequency,and then the active and reactive current components under the traditional vector control are converted to a static coordinate.Simulation and field test results show that,when using this regulation,the state error free tracking of fundamental frequency current could be realized by setting the resonance frequency of the controller to fundamental frequency phasic of power grid voltage.It is much easier than the method of traditional voltage oriented vector control.Moreover,it can be used to compensate for the specific harmonics,which improves the robustness of the control system and the power quality of the power grid.
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