随着新能源汽车产业的蓬勃发展,新能源汽车充电模块研究也在逐渐深入。主流的新能源充电模块由前级AC/DC变换器和后级DC/DC变换器构成。本文针对前级AC/DC部分就三相三电平Vienna PFC电路的稳定控制展开研究,建立了数学模型,推导了控制...随着新能源汽车产业的蓬勃发展,新能源汽车充电模块研究也在逐渐深入。主流的新能源充电模块由前级AC/DC变换器和后级DC/DC变换器构成。本文针对前级AC/DC部分就三相三电平Vienna PFC电路的稳定控制展开研究,建立了数学模型,推导了控制到输出的传递函数。基于三电平Vienna PFC电路的双闭环控制策略,研究了两种控制参数的整定方法,一是基于前馈解耦法构建了电流内环控制模型和基于功率平衡设计了电压外环控制模型;二是电流内环采用Ⅰ型系统和电压外环采用Ⅱ型系统设计了控制参数。对两种控制参数的整定得出的结果进行了仿真比较,得到较好的电压、电流环控制参数整定方法。仿真和实验验证了方法的正确性。With the vigorous development of the new energy vehicle industry, research on charging modules for new energy vehicles is gradually deepening. The mainstream new energy charging module consists of a front-end AC/DC converter and a back-end DC/DC converter. This article focuses on the stability control of the three-phase three-level Vienna PFC circuit in the front-end AC/DC section, establishes a mathematical model, and derives the transfer function from control to output. A dual closed-loop control strategy based on three-level Vienna PFC circuit was studied, and two tuning methods for control parameters were studied. Firstly, a current inner loop control model was constructed based on feed forward decoupling method, and a voltage outer loop control model was designed based on power balance;The second is that the current inner loop adopts a Type I system and the voltage outer loop adopts a Type II system to design control parameters. A simulation comparison was conducted on the tuning results of two control parameters, and a better voltage and current loop control parameter tuning method was obtained. The correctness of the method was verified through simulation and experiments.展开更多
文摘随着新能源汽车产业的蓬勃发展,新能源汽车充电模块研究也在逐渐深入。主流的新能源充电模块由前级AC/DC变换器和后级DC/DC变换器构成。本文针对前级AC/DC部分就三相三电平Vienna PFC电路的稳定控制展开研究,建立了数学模型,推导了控制到输出的传递函数。基于三电平Vienna PFC电路的双闭环控制策略,研究了两种控制参数的整定方法,一是基于前馈解耦法构建了电流内环控制模型和基于功率平衡设计了电压外环控制模型;二是电流内环采用Ⅰ型系统和电压外环采用Ⅱ型系统设计了控制参数。对两种控制参数的整定得出的结果进行了仿真比较,得到较好的电压、电流环控制参数整定方法。仿真和实验验证了方法的正确性。With the vigorous development of the new energy vehicle industry, research on charging modules for new energy vehicles is gradually deepening. The mainstream new energy charging module consists of a front-end AC/DC converter and a back-end DC/DC converter. This article focuses on the stability control of the three-phase three-level Vienna PFC circuit in the front-end AC/DC section, establishes a mathematical model, and derives the transfer function from control to output. A dual closed-loop control strategy based on three-level Vienna PFC circuit was studied, and two tuning methods for control parameters were studied. Firstly, a current inner loop control model was constructed based on feed forward decoupling method, and a voltage outer loop control model was designed based on power balance;The second is that the current inner loop adopts a Type I system and the voltage outer loop adopts a Type II system to design control parameters. A simulation comparison was conducted on the tuning results of two control parameters, and a better voltage and current loop control parameter tuning method was obtained. The correctness of the method was verified through simulation and experiments.
