Analysis and Optimization of Boost Converter Parameters in Internal Model Control for Voltage Source Converter-based AC Microgrids  

作　　者：Chiebuka Eyisi Qifeng Li 

机构地区：[1]Department of Electrical and Computer Engineering,University of Central Florida,Orlando,FL 32816 USA.

出　　处：《CSEE Journal of Power and Energy Systems》2024年第5期2038-2054,共17页中国电机工程学会电力与能源系统学报（英文）

基　　金：supported by the U.S.National Science Foundation under Grant#2124849.

摘　　要：This paper investigates integration of distributed energy resources(DERs)in microgrids(MGs)through two-stage power conversion structures consisting of DC-DC boost converter and DC-AC voltage source converter(VSC)subsystems.In contrast to existing investigations that treated DC-link voltage as an ideal constant voltage,this paper considers the non-ideal dynamic coupling between both subsystems for completeness and higher accuracy,which introduces additional DC-side dynamics to the VSC.The analysis shows parameters of the boost converter’s power model that impact stability through the DC-link.Carefully selecting these parameters can mitigate this effect on stability and improve dynamic performance across the DC-link.Hence,an optimization framework is developed to facilitate in selecting adequate boost converter parameters in designing a stable voltage source converter-based microgrid(VSC-MG).The developed optimization framework,based on particle swarm optimization,considers dynamic coupling between both subsystems and is also effective in avoiding inadequate boost converter parameters capable of propagating instability through the DC-link to the VSC.Simulations are performed with MATLAB/Simulink to validate theoretical analyses.

关 键 词：AC microgrid boost converter DEAD-TIME droop control internal model control particle swarm optimization small-signal analysis time delay virtual impedance voltage source converter 

分 类 号：TM46[电气工程—电器]