基于无源性PI控制的直流微电网双向变换器电压控制  

Voltage Control of DC Microgrid Bi-directional Converter Based on Passivity PI Control

作　　者：欧阳鹏 赵世伟[1] OUYANG Peng;ZHAO Shiwei(School of Electric Power,South China University of Technology,Guangzhou 510006,China)

机构地区：[1]华南理工大学电力学院,广东广州510006

出　　处：《机械制造与自动化》2023年第5期205-209,共5页Machine Building & Automation

基　　金：广东省自然科学基金项目(2018A0303130221)。

摘　　要：在直流微电网中,双向Buck/Boost变换器可以通过直流母线与储能单元的能量交互维持直流母线电压的稳定。基于该变换器的Boost工作模式进行电流内环无源性控制器以及电压外环PI控制器的设计。通过Simulink仿真平台搭建简化的光伏直流微电网模型,对所提控制算法进行仿真分析,并搭建一台500 W的实验样机对所提控制算法进行实验验证。仿真和实验结果表明:与传统PI控制相比,所提出的无源性PI控制策略具有设计过程简单和动态响应快的优点,可以较好地平衡直流母线电压,验证了该控制算法在双向Buck/Boost变换器上应用的有效性。In DC microgrid,bi-directional Buck/Boost converter can be used to maintain the stability of DC bus voltage.Designes PBC-PI voltage controller based on Boost operating mode.A simplified DC microgrid model is built through Simulink simulation platform,simulations are performed under the proposed control scheme and a 500 W prototype is built to verify the proposed control scheme.Simulation and experimental results show that the proposed control scheme has the advantages of simple design,fast dynamic response and good busbar voltage balance,which verifies its effectiveness in the application of bi-directional Buck/Boost converter.

关 键 词：直流微电网 双向Buck/Boost变换器 Boost工作模式 无源性控制 PI控制 

分 类 号：TM46[电气工程—电器]