摘要
相比储能电池搭配双向DC/DC变换器接入直流母线的方式,采用多重化四开关Buck-Boost(Four-Switch Buck-Boost,FSBB)变换器作为工商业光储变流器的前级变换器,可减少电感数量与设备体积,并实现宽范围的光伏电压输入。针对多重化FSBB存在多模式硬切换、传统控制方法准确度较低、储能工况鲁棒性差等问题,采用载波层叠的调制方式,实现Buck、Buck-Boost和Boost三种模式之间的平滑切换,建立单重FSBB变换器三模式下的统一状态方程。此外,通过设计一种超螺旋滑模控制(ST-SMC)方法,对多重化FSBB变换器光伏侧进行控制,实现最大功率快速追踪。在MATLAB/Simulink上搭建光储变换器的仿真模型,仿真结果表明:相较于传统比例积分控制和滑模控制方法,ST-SMC可显著提升光伏储能系统的稳态和动态性能。
Compared with the DC bus access mode of energy storage battery combined with bidirectional DC/DC Converter,the multiplex Four-Switch Buck-Boost converter(FSBB)is used as the front stage converter of industrial and commercial optical storage converter,which can reduce the number of inductors and equipment volume.And achieve a wide range of photovoltaic voltage input.Aiming at the problems of multi-mode hard switching,low accuracy of traditional control methods and poor robustness of energy storage conditions in multi-mode FSBB,carrier cascade modulation is adopted to realize smooth switching between Buck,Buck-Boost and Boost modes,and a unified equation of state under the three modes of single FSBB converter is established.In addition,a super spiral sliding mode control method is designed to control the multiplex FSBB converter on the photovoltaic side,and the maximum power fast tracking is realized.The simulation model of the optical storage converter is built on MATLAB/Simulink.The simulation results show that ST-SMC can better improve the stability and dynamic performance of the photovoltaic energy storage system compared with the traditional proportional integration and sliding mode control methods.
作者
刘江
王吉祥
廖小兵
李自成
LIU Jiang;WANG Jixiang;LIAO Xiaobing;LI Zicheng(School of Electrical and Information Engineering,Wuhan Institute of Technology,Wuhan 430070,China)
出处
《电气应用》
2025年第6期99-105,共7页
Electrotechnical Application
基金
湖北省自然科学基金项目(2021CFB030)
武汉市重点研发计划项目(2023010402010584)。
