船用690 Vac基于飞跨电容三电平的Buck/Boost双向变换器的预充电控制策略  

Pre-charge control strategy for marine 690 Vac Buck/Boost bidirectional converter based on three-level flying capacitor

作　　者：李维波 潘峻锋 李柄宏 罗辑 LI Weibo;PAN Junfeng;LI Binghong;LUO Ji(School of Automation,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]武汉理工大学自动化学院,湖北武汉430070

出　　处：《中国舰船研究》2023年第3期250-258,共9页Chinese Journal of Ship Research

基　　金：国家重点研发计划课题资助项目(2020YFB1506802);国家自然科学基金面上项目资助(51977164)。

摘　　要：[目的]针对基于飞跨电容三电平的船用690 Vac双向变换器,为使其能稳定启动并过渡到正常工作状态,必须对飞跨电容进行预充电,因此提出适应于飞跨电容三电平的基于单管控制的预充电策略。[方法]控制基于飞跨电容的三电平外管的通断,对飞跨电容进行高效、快速预充电控制。[结果]将预充电控制策略应用于690 Vac双向变换器,Buck模式于1 s,Boost模式于5 s内完成飞跨电容的预充电,预充电结束后飞跨电容电压保持为高压侧电压的一半,输入侧电容电压保持为输入侧电压。[结论]经过试验验证,所提出的基于飞跨电容的三电平外管通断控制的预充电策略可应用于690 Vac双向变换器装置,不需要外加预充电功率器件,既简化了拓扑,又确保飞跨电容的可靠、快速预充电。[Objectives]For a marine 690 Vac bidirectional converter based on a three-level flying capacit-or,in order to make it start stably and transition to its normal working state,the flying capacitor must be pre-charged.This paper proposes a pre-charging strategy based on single-tube control which is suitable for three-level flying capacitors.[Methods]The on-off of the three-level outer tube is controlled on the basis of the flying capacitor,and efficient and fast pre-charging control is performed.[Results]When this strategy is ap-plied to a 690 Vac bidirectional converter,the pre-charging of the flying capacitor is completed within 1 second in Buck mode and less than 5 seconds in Boost mode.After pre-charging,the voltage of the flying ca-pacitor remains at the value of half of the voltage of the high voltage side,and the voltage of the input side ca-pacitor remains at the value of the input side voltage.[Conclusions]After experimental verification,the pro-posed pre-charging strategy based on controlling the outer tube of the three-level flying capacitor can be ap-plied to a 690 Vac bidirectional converter device without the need for additional pre-charging power devices,which not only simplifies the topology but also ensures the reliable and fast pre-charging of flying capacitors.

关 键 词：AC/DC变换器 DC/DC变换器 三电平 飞跨电容 预充电 

分 类 号：U665.14[交通运输工程—船舶及航道工程]