半主动混合储能双向直流变换器的精确建模

摘要

In order to optimize the bidirectional DC-DC converter control system,an accurate modeling of bi-directional DC-DC converter is very important.This paper presented a half-bridge Buck/Boost converter with input and output filter circuits as the modeling object.The working principle of the converter was analyzed and large-signal model and small signal model were established by the state-space averaging method.A semi-active hybrid energy storage system(HESS)was modeling in Simulink to test the small signal model of half-bridge converter.%为了优化设计双向直流变换器（BDC）的控制系统，对双向直流变换器进行了精确建模。选用带有输入和输出滤波电路的半桥式Buck／Boost变换器作为建模对象，分析了变换器的工作原理，采用状态空间平均法分别建立了大信号模型和小信号模型，并理论推导了各个扰动电量到输出电压扰动的传递函数。最后在Simulink下建立了半主动混合储能系统，验证了建模的正确性。