【摘要】 针对应用于矿用电动车混合储能系统的传统Z源逆变器或单开关电感Z源逆变器存在电压增益、功率密度和转换效率均不高的问题,提出了一种新型Z源逆变器。该逆变器采用基于阵列式磁集成技术的模块化开关耦合电感单元替代传统Z源逆变器的电感,提高功率密度和电压增益,并通过引入辅助软开关支路实现功率器件零电压开关,提高转换效率。对基于新型Z源逆变器的混合储能系统进行了建模,通过分析极点,发现引起系统振荡的1对共轭极点及系统振荡处频率,结合模型进行了电流控制器参数设计,推导出电流控制器比例和积分参数的设计准则。仿真与实验结果验证了该电流控制器设计准则的正确性。更多还原

【Abstract】 Aiming at problems of low voltage gain,low power density and low conversion efficiency of traditional Z-source inverter or single-switch inductor Z-source inverter used in hybrid energy storage system of mine-used electric vehicle,a novel Z-source inverter was proposed.Modular switch coupled inductance units based on array magnetic integration technology is used to replace inductance of traditional Z-source inverter,so as to improve power density and voltage gain.By introducing auxiliary soft switch branch to realize zero-voltage switch of power devices,conversion efficiency is improved.Hybrid energy storage system based on the novel Z-source inverter was modeled.Through pole analysis,one pair of conjugated poles causing the system to oscillate and frequency of system oscillation were found,current controller parameters are designed with the model,and design criteria of proportional and integral parameters of current controller were derived.The simulation and experimental results verify correctness of the design criteria of the current controller.更多还原