电力工程技术2025，Vol.44Issue(4)：62-70,9.DOI:10.12158/j.2096-3203.2025.04.007
低压柔性直流互联系统运行控制与模式自适应切换策略
Operation control and mode adaptive switching strategy for low-voltage flexible DC interconnection systems
摘要
Abstract
Low-voltage flexible direct currect(LV-FDC)technology represents a vital technical approach to addressing the issues of heavy overloading and power supply reliability in end-user distribution networks.The core technological foundation of LV-FDC systems lies in their efficient operation under steady-state conditions and rapid switching control during transient states.This paper analyzes and summarizes the typical decentralized networking modes of LV-FDC systems,encompassing system topologies,connection schemes,and voltage levels.Aiming at the heavy overloading issue in transformer zones caused by uneven spatial and temporal load distributions,a set of steady-state load balancing control logic is proposed.For the issue of system operation mode switching during fault transients,an adaptive switching control based on local voltage information is proposed,which reduces the system's dependence on communication and achieves seamless switching between operating modes through the design of the slave control unit's control loop.Furthermore,an integrated design for steady-state and transient operation control based on master-slave control is analyzed in the context of multi-terminal flexible interconnection applications,ensuring efficient coordination and reliable operation of the system under both steady and transient conditions.Finally,the correctness of all control logic strategies is verified through PSCAD time-domain simulations and RT-LAB hardware-in-the-loop experiments.关键词
低压直流/柔性互联/分散式组网/均载运行/暂态控制/自适应切换逻辑/无缝切换Key words
low-voltage direct currect/flexible interconnection/decentralized network/load sharing operation/transient control/adaptive switching logic/seamless switching分类
信息技术与安全科学引用本文复制引用
蒋昌君,刘海涛,熊雄,郭昌浩..低压柔性直流互联系统运行控制与模式自适应切换策略[J].电力工程技术,2025,44(4):62-70,9.基金项目
国家重点研发计划资助项目"配电网高功率密度柔性互联技术和装备"(2023YFB2407400) （2023YFB2407400）
