电力系统保护与控制2025，Vol.53Issue(15)：13-26,14.DOI:10.19783/j.cnki.pspc.241371
基于改进模型预测控制的大功率双极Π型DC/DC变换器研究
Study of high-power bipolar Π-type DC/DC converter based on improved model predictive control
摘要
Abstract
Non-isolated DC/DC converters face challenges such as weak stability,poor power quality,and limited fault handling capability in grid interconnection.This paper analyzes the topology and fault blocking principle of a bipolar Π-type DC/DC converter(DC-MMC)with single-phase operation and bi-directional DC fault blocking capability.A double-closed-loop PI control strategy is designed based on single-phase dq decoupling to control the DC component of the bridge arm,the system circulating current,and the power balance between the bridge arms in the converter.However,model predictive controls applicable to DC-MMC often have the problems of complex control,large computation and slow response,etc.Aiming at the strong coupling characteristics of the converter structure,an improved model predictive control strategy based on the principle of step-by-step optimization is proposed to improve the steady-state and transient performance of the converter.Finally,the feasibility and effectiveness of the proposed control strategy are verified using a simulation model built in MATLAB/Simulink.关键词
非隔离型模块化多电平DC/DC变换器/单相解耦变换器/模型预测控制/双向直流故障闭锁Key words
non-isolated modular multilevel DC/DC converter/single-phase decoupled converter/model predictive control/bidirectional DC fault block引用本文复制引用
孟繁丞,马文忠,王玉生,张文艳,李恒硕,朱亚恒..基于改进模型预测控制的大功率双极Π型DC/DC变换器研究[J].电力系统保护与控制,2025,53(15):13-26,14.基金项目
This work is supported by the National Natural Science Foundation of China(No.52277208). 国家自然科学基金项目资助(52277208) （No.52277208）
