适用于高功率密度场合的谐振式HFAC配电系统

Resonant HFAC Power Distribution System for High Power Density Situation

高频交流(HEAC)配电系统作为一种新型配电方式,具有功率密度高、暂态响应快及易于电气隔离等优点,受到了航空航天、新能源汽车及微电网领域的关注。就HFAC配电系统中初级DC/DC变换器及后级高频谐振逆变器进行了深入研究;针对初级DC/DC环节,建立了动态数学模型,给出了主功率参数确定原则,并分析了其开环特性,进而加入三阶补偿环路,实现了幅值的闭环控制。针对后级高频逆变环节,提出了半桥谐振拓扑方案,并重点对交流母线的脉冲相位调制(PPM)进行了分析,从而实现了相位的闭环控制。通过仿真和实验验证了所设计拓扑与控制方法的可行性和可靠性,为HFAC配电系统在新领域的应用提供了一定指导意义。

High frequency alternating current（HFAC）power distribution system（PDS）as a new method of distribution,has its advantages of high power intensity,quick transient response and easy realization of electric isolation,which makes a lot of fields such as aviation and smart electrical energy networks pay a lot of close attention.The primary DC/DC converter and the back stage high frequency resonant inverter in HFAC power distribution system are deeply studied.According to the primary converter,the dynamic mathematical model is established,the main power parameters and open loop characteristic are given by the analysis of the principle,and then the three order compensation loop is added,so as to realize amplitude control.In the back stage high frequency inverter,a half bridge resonant topology is proposed,and pulse phase modulation（PPM）of AC bus is analyzed in detail,so as to closed loop phase control.Finally,the feasibility and reliability of the proposed topology and control method are verified by simulation and experiment,which provide guidance for the application of HFAC power distribution system in the new field.