一种充电设备整流电路新型控制策略的研究

在此将三相PWM整流电路应用于充电设备主电路,以达到充电设备输出长期稳定、可靠性好、输出纹波小、传递效率高的要求。在整流器控制策略上采用基于电压定向的的矢量控制,对电压定向原则进行了分析,并推导了dq轴电流解耦方式。仿真结果表明采用该方案整流器能快速跟踪给定,具有直接电流控制的动态响应快、稳态性能好的特点。由于采用了网侧电流闭环控制也使网侧电流变化对系统参数不敏感,从而增强了电流控制系统的鲁棒性。

Study on a New Control Strategy of PWM Rectifier in Charging Device

PWM rectifier technology is introduced to the main power circuit of the charger to enhance the charging efficiency, improve its long term reliability and save its life. A new strategy of space vector control based on voltage oriented is used in PWM rectifier. It simplifies voltage oriented principle and the method of decoupling control for both axis quantities of the input current. The simulation results show that it can realize unit power factor and small current harmonic with excellent dynamic-static performance. The input current changes become insensitive against the system parameter since it adopted the current closed loop control method, and the robustness of the current controlling system can be enhanced.