基于占空比补偿的飞跨电容双向Buck-Boost变换器移相优化控制策略  

Optimization Strategy of Flying Capacitor Bi-directional Buck-Boost Converter Based on Phase-shifted Control with Duty Ratio Compensation

作　　者：庄煜 毕恺韬 艾建 黄文涛 朱一昕 颜文旭 ZHUANG Yu;BI Kaitao;AI Jian;HUANG Wentao;ZHU Yixin;YAN Wenxu(School of Internet of Things Engineering,Jiangnan University,Wuxi 214122)

机构地区：[1]江南大学物联网工程学院,无锡214122

出　　处：《电气工程学报》2024年第4期176-185,共10页Journal of Electrical Engineering

基　　金：国家自然科学基金(51807079);江苏省自然科学基金(BK20200623);博士后科学基金(2020M681692)资助项目。

摘　　要：为了提升储能系统中飞跨电容双向Buck-Boost变换器(Flying capacitor bidirectional buck-boost converter,FCBBC)的运行效率,提出一种基于占空比补偿的移相优化控制策略。该控制策略在移相调制的基础上,对变换器左右桥臂的占空比进行独立补偿优化,使变换器在相同输出功率等级下的电流纹波及电感电流均值得到了减小,同时提升变换器的运行效率。通过状态变量分析法分析补偿后各工作模态下电感电流和电容电压,在此基础上设计了储能模式下的双向能量控制闭环方案,实现了对系统电流及双侧飞跨电容电压的有效控制。最后,通过搭建的物理仿真试验平台对所提优化控制方案进行了有效验证。In order to improve the power density of flying capacitor bidirectional Buck-Boost converter(FCBBC),an optimal control strategy based on duty ratio compensation is proposed.The left and right bridge arms of the converter are independently compensated and optimized based on the phase-shifted modulation,so that the average inductor current and current ripple of the converter are reduced under the same power level,so as to achieve the purpose of optimizing the efficiency of the converter.At the same time,a closed-loop energy control scheme for energy storage is designed based on the compensation principle,which can control the inductor current and voltage of flying capacitor effectively.Finally,the proposed optimization control scheme is validated by the physical simulation experiment platform.

关 键 词：储能系统 飞跨电容 双向Buck-Boost变换器 效率优化 解耦控制 

分 类 号：TM561[电气工程—电器]