三电平降压型DC/DC变换器的建模与控制  

Modeling and Control of Three-level Step-down DC/DC Converter

作　　者：尹俊峰 苏建徽[1] 施永[1] 李乐 YIN Jun-feng;SU Jian-hui;SHI Yong;LI Le(Hefei University of Technology,Hefei 230009,China;不详)

机构地区：[1]合肥工业大学,电气与自动化工程学院,安徽合肥230009 [2]常州中海电力科技有限公司,江苏东常州213000

出　　处：《电力电子技术》2024年第10期102-105,共4页Power Electronics

基　　金：中央高校基本科研业务费专项资金(PA2022GDGP0032);安徽省自然科学基金(2308085ME180)。

摘　　要：三电平非隔离DC/DC变换器具有高效率、高功率密度、低成本等优点,广泛应用于新能源储能领域。此处分析了三电平降压型DC/DC的工作原理,推导并建立了系统的小信号模型,采用载波移相控制。同时,针对高压侧电容中点电位不平衡问题,采用了一种电容电压平衡控制策略。最后,对所采用的变换器控制策略进行了仿真,并在一台60 kW样机上得到验证。The three-level non-isolated DC/DC converter has the advantages of high efficiency,high power density and low cost,and is widely used in the field of new energy storage.The working principle of three-level step-down DC/DC is analyzed,the small signal model of the system is deduced and established,and carrier phase shift control is adopt-ed.At the same time,a capacitor voltage balance control strategy is adopted to solve the problem of capacitor mid-point potential imbalance on the high voltage side.Finally,the proposed converter control strategy is simulated and verified on a 60kW prototype.

关 键 词：变换器 三电平降压型 载波移相 电容电压平衡控制 

分 类 号：TM46[电气工程—电器]