一种适用于舰船综合电力推进系统的对称混合五电平拓扑及其控制策略  

Topology and Control of a Symmetrical Hybrid Five-level Inverter for Vessel Integrated Electric Propulsion System

作　　者：许晓晖 王奎[2] 刘念洲 郑泽东[2] 李永东[2] Xu Xiaohui;Wang Kui;Liu Nianzhou;Zheng Zedong;Li Yongdong(National Key Laboratory of Science and Technology on Vessel Integrated Power System,Wuhan 436000,China;State Key Lab of Control and Simulation of Power System and Generation Equipments ,Dept. of Electrical Engineering,Tsinghua University,Beijing 100084,China)

机构地区：[1]舰船综合电力技术国防科技重点实验室,武汉436000 [2]清华大学电机系电力系统及发电设备控制和仿真国家重点实验室,北京100084

出　　处：《船电技术》2019年第7期5-8,共4页Marine Electric & Electronic Engineering

摘　　要：为了满足舰船中压直流综合电力推进系统对中压大容量推进变频器的需求,本文提出了一种适用于多相开绕组电机的对称混合五电平拓扑,每一相电路均由一个高频DC/DC单元和一个高压H桥单元组成。介绍了其工作原理和调制方法,针对其母线中点电压平衡问题,提出了一种微调PWM脉冲占空比的中点电压平衡控制方法。仿真结果表明该拓扑及其控制方法正确、有效。In order to meet the demand of vessel medium-voltage DC integrated power system for medium-voltage high-power propulsion inverters, a symmetrical hybrid five-level topology suitable for multi-phase open-winding motors is proposed. Each phase of this topology is composed of a high-frequency DC/DC unit and a high-voltage H-bridge unit. The operating principle and modulation method of the topology is introduced. A DC-link neutral-point potential balancing method is also proposed to balance the two DC-link capacitor voltages by adjusting the duty cycles of PWM signals slightly. Simulation results are presented to confirm the validity of the topology and method.

关 键 词：舰船综合电力推进系统 多电平变换器 中点电压平衡 

分 类 号：U664.14[交通运输工程—船舶及航道工程]