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基于电压前馈的地铁高频充电机动态特性控制分析与改进

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Keywords: 城市轨道交通,地铁充电机,动态特性,小信号模型,PID调节器,电压前馈

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Abstract:

地铁高频充电机接触网电压波动和负载扰动均会引起输出侧电压短时振荡,影响系统稳定性。本文基于状态空间平均法,分阶段构建系统小信号数学模型,进而通过近似线性化方法推导出系统开环传递函数,并在此基础上深入探讨其在复频域下的稳定性和动态特性,从而提出采用PID调节器和输入电压前馈的新型PWM控制策略,并进一步分析该控制策略的衍生机理和实现方式。通过MATLAB模型仿真,并在样机上进行相关实验,表明了该控制策略的正确性和可行性。

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