电力系统保护与控制2025，Vol.53Issue(5)：135-144,10.DOI:10.19783/j.cnki.pspc.240310
考虑直流侧电源特性影响的跟网型变换器控制参数设计
Control parameter design for a grid-following converter considering the influence of DC-side characteristics
摘要
Abstract
This paper focuses on analyzing the impact of different DC-side characteristics on control parameter design for grid-following(GFL)converters.Based on the state-space averaging theory,an averaged model of the GFL converter is established.The DC-side terminal in typical application scenarios is equivalently modeled as a constant power source and a constant current source.Linearized modeling methods for phase current control,phase-locked loop(PLL),and DC voltage control are derived,and controller parameters are quantitatively calculated for both operating modes.For grid connection under a constant current source,the right-half plane(RHP)poles introduced by the DC voltage control lead to open-loop instability and potential operational instability.To address this,the control bandwidth and phase margin of the DC voltage control are designed to balance stability and dynamic response speed,with controller parameters being calculated and verified based on frequency characteristics.Finally,a detailed switching model for the GFL converter is constructed,and simulation analyses with different DC-side sources are conducted.The results validate the accuracy and effectiveness of the proposed controller parameter design scheme,ensuring control parameter adaptability in varying operational conditions.关键词
跟网型换流器/恒直流功率源/恒直流电流源/直流电压控制/控制参数设计Key words
grid-following converter/constant DC power source/constant DC current source/DC voltage control/control parameter design引用本文复制引用
闫征,赵清松,徐建源..考虑直流侧电源特性影响的跟网型变换器控制参数设计[J].电力系统保护与控制,2025,53(5):135-144,10.基金项目
This work is supported by the National Natural Science Foundation of China(No.51777130). 国家自然科学基金项目资助(51777130) （No.51777130）
国网总部科技项目资助(5108-202218280A-2-382-XG) （5108-202218280A-2-382-XG）
