隔离型三端口变换器的H∞鲁棒控制

H∞ Robust Control of The Isolated Three-port DC-DC Converter

对隔离型三端口DC-DC变换器进行了小信号建模,针对小信号模型设计了虚拟电阻和LC滤波器,用于滤除变换器输入测电流的二倍开关频率高频谐波;利用H∞鲁棒控制方法对该变换器进行鲁棒控制,用以检验该方法在隔离型三端口变换器上的应用,同时能够使系统得到比较好的鲁棒性;最后对系统进行了仿真和实验,验证了理论分析的正确性。

This paper makes small-signal modeling to the isolated 3-port DC-DC converter,designs the virtual resistor and LC filter aiming at small signal model for filtering the high frequency harmonic wave of double switch frequency input from the converter for current test,uses H∞robust control method to perform robust control to the converter for checking up the application of the method to the isolated 3-port converter,at the same time the system gains better robust,finally performs simulation and experiment to the system,which validates the correctness of theory analysis.