新式船舶轴带发电并网Z源逆变器

针对当前船舶轴带发电并网Z源逆变器升压能力有限、电感启动电流冲击大、输出电压易发生畸变且输出不稳定、逆变器电容电压应力大等缺点，在传统Z源逆变器基础上研究一种新式Z源逆变器。新式Z源逆变器不仅提高了升压能力，减小了电容电压应力和电感启动电流对器件的冲击，改善了输出电压的品质，还可根据船舶实际使用情况通过改变电感数量来选取合适的逆变器。对新式Z源逆变器的拓扑结构、工作原理进行了详细分析，并比较了在电感数目取不同数值时升压因子、电容电压应力、电感电流应力等参数，最后通过进行仿真验证了新式Z源逆变器的优点，证明了结论的正确性。

Novel Z-source inverter of ship shaft generator grid-connected system

The Z-source inverter of the current ship shaft generator grid-connected system has many deficiencies: the boosting ability is limited, the impact of inductor starting current is large, output voltage is unstable, the voltage stress of inverter capacitor is large and so on. The novel Z-source inverter is proposed on the basis of traditional Z-source inverter. The novel Z-source inverter can improve boosting ability and the quality of output voltage, decrease the voltage stress of inverter capacitor and impact of inductor starting current. According to the demands of actual application of ships, the more appropriate Z-source topology can be selected by changing the number of inductance. With the analysis of novel Z-source inverter topology structure and working principle, comparatively analyse boost factor, capacitor voltage stress, current stress of inductance and so on when the inductance number are different. Eventually the advantages of the novel Z-source inverter are verified by simulation, and the correctness of the conclusion is proved.