车载动力电池模拟电源的准PR控制策略及仿真

针对车载动力电池工况变化剧烈难以精确模拟的问题,采用准PR(比例谐振)控制策略,对动力电池模拟电源的前端双向PWM整流模块实现精确稳定控制,给出准PR控制器参数与模拟电源系统参数匹配设计的步骤,分析了PWM模块前端电感和后端电容对模拟电源响应速度和稳定性的影响,结合双向DC/DC变换器模块,建立模拟电源的整体模型。仿真实验结果表明,模拟电源能够精确模拟车载动力电池在不同工况下的充放电特性,满足车载测试平台宽范围动态测试要求,对电网冲击较小。

Quasi-PR Control Strategy with Its Simulation of Vehicle Power Battery Analog Power Supply

In view of the difficulty found in an accurate simulation of the change of working conditions of vehicle power battery, the quasi-PR (proportional resonance) control strategy has been adopted to realize the precise and stable control of the two-way PWM rectifier module at the front end of the power battery simulation power supply. With the matching design steps of the parameters of the quasi-PR controller and the parameters of the simulation power supply system given, an analysis has thus been made of the response speed of the front-end inductance and back-end capacitance of the PWM module to the simulation power supply, combined with the influence of the stability and the bi-directional DC/DC converter module, thus establishing the overall model of analog power supply. The simulation results show that the simulation power supply can accurately simulate the charging and discharging characteristics of the vehicle power battery under different working conditions, and meet the requirements of the vehicle test platform for a wide range of dynamic testing platform with little impact on the power grid.