新型开关电感型准Z源逆变器

New Type of Switched-inductor Quasi-Z-source Inverter

为提高煤矿井下应急供电系统的可靠性,提出并设计了一种新型开关电感型准Z源逆变器电路拓扑作为应急电源系统主电路。分析了其拓扑结构和工作原理,利用伏秒平衡原理推导了电路各部分的电压关系,这种新型拓扑具有升压能力强、电容器电压应力小的优点。并在此拓扑的基础上提出了一种多级联开关电感型准Z源逆变器,升压能力进一步得到提高。最后,在基于简单升压控制下利用MATLAB/Simulink软件进行仿真,仿真结果表明了理论分析的正确性和可靠性。

In order to improve the reliability of the emergency power supply system in underground coal mine, a new switched-inductor quasi-Z-source inverter circuit is proposed and designed as the main circuit of the emergency power supply system. The topological structure and working principle of the circuit is analyzed, and the voltage relation of each part of the circuit is deduced by using voltage- second balance principle, the new topology has the advantages of strong boosting capability and small capacitor voltage stress. On the basis of this topology, a multi-cascaded switched-inductor quasi-Z- source inverter is proposed, and the boost capacity further strengthened. Finally, the results show that the theoretical analysis is correct and reliable by MATLAB/Simulink simulation based on the simple boost control.