光储隔离型三端口DC-DC变换器线性自抗扰控制  

Linear active disturbance rejection control of optical storage isolated three-port DC-DC Converter

作　　者：李山 肖冬阳 李海啸 冉卓鑫 LI Shan;XIAO Dongyang;LI Haixiao;RAN Zhuoxin(School of Electrical and Electronic Engineering,Chongqing University of Technology,Chongqing 400054,China)

机构地区：[1]重庆理工大学电气与电子工程学院,重庆400054

出　　处：《重庆理工大学学报(自然科学)》2025年第2期234-242,共9页Journal of Chongqing University of Technology:Natural Science

基　　金：重庆市自然科学基金面上项目(CSTB2022NSCQ-MSX0997);重庆市教委青年研究项目(KJQN202201153);重庆理工大学科研启动基金项目(2021ZDZ013)。

摘　　要：针对直流微电网中的三端口变换器各端口功率流动以及输出电压会受到变换器时变性强、模型复杂的影响,为提高变换器的稳态特性和动态响应,提出了一种光储隔离型三端口DC-DC变换器线性自抗扰控制。通过建立隔离型三端口变换器小信号模型,将线性自抗扰控制器引入电压环,利用线性扩张状态观测器对系统状态进行实时估算,将工况模式切换、负载投切导致传输功率波动等视作系统扰动并进行补偿。同时,通过解耦矩阵计算出对应的移相角,实现对三端口变换器的控制。最后,基于搭建的一台5 kW的实验样机,通过仿真与实验分析,对所提出的控制策略的有效性进行验证,结果表明所提出的方法在实现端口功率协同控制的同时可改善母线负载电压的稳定性。The power flow and output voltage of each port of the three-port converter in the DC microgrid are influenced by the strong time variability of the converter and the complexity of the model.To improve the steady-state characteristics and dynamic response of the converter,we propose a linear active disturbance rejection control of the three-port DC-DC converter with optical storage isolation.By establishing a small signal model of an isolated three-port converter,a linear active disturbance rejection controller is introduced into the voltage loop.The linear expansion state observer is employed to estimate the system state in real time,and the transmission power fluctuation caused by working condition mode switching and load switching is regarded as system disturbance and thus compensated.The corresponding phase-shift angle is calculated by the decoupling matrix to realize the control of the three-port converter.Finally,based on a 5 kW experimental prototype,the effectiveness of our control strategy is verified through simulation and experimental analysis.Results show our method improves the stability of the bus load voltage while realizing the cooperative control of port power.

关 键 词：三端口DC-DC变换器 线性自抗扰 动态性能 功率协调控制 

分 类 号：TM46[电气工程—电器]