电网技术2026，Vol.50Issue(4)：1455-1462,中插20-中插22,11.DOI:10.13335/j.1000-3673.pst.2025.1008
一种直流直挂式储能系统及其功率解耦控制策略
A DC-cascaded Energy Storage System and Its Power Decoupling Control
摘要
Abstract
This paper proposes an innovative hybrid modular DC-cascaded energy storage system solution for integrating energy storage within DC power grids.By adopting a topology design that combines a'constant voltage'module with a'voltage regulation'module in a hybrid cascade configuration,the system retains the advantages of modularity while significantly enhancing performance.Specifically,the design achieves over a 40％reduction in operational losses and more than a 50％decrease in the volume of power conversion modules.A comprehensive suite of control strategies is introduced,including a power decoupling control method,a state-of-charge(SOC)dynamic rotation algorithm,and a DC voltage ride-through control strategy.These strategies effectively address the power control coupling challenges inherent in conventional schemes.Validation via PSCAD/EMTDC simulations demonstrates that the system maintains excellent and stable operation across a wide voltage range,delivers millisecond-level dynamic response,and ensures smooth mode switching.The presented research offers a novel technical pathway for integrating energy storage into DC transmission projects,providing significant theoretical insights and practical value for advancing flexible DC grids and the large-scale integration of renewable energy sources.关键词
直流直挂储能/模块化多电平/故障穿越/功率解耦Key words
DC-cascaded energy storage/modular multilevel/fault ride-through/power decoupling分类
信息技术与安全科学引用本文复制引用
季一润,高岩峰,陈宇硕,赵彪,杨敏祥,徐驰,洪剑锋..一种直流直挂式储能系统及其功率解耦控制策略[J].电网技术,2026,50(4):1455-1462,中插20-中插22,11.基金项目
国网冀北电力有限公司科技项目:"高压直流直挂储能系统关键技术与优化设计研究"(B3018K240061).Project Supported by Science and Technology Project of State Grid Jibei Electric Power Company Limited:"Research on Key Technologies and Optimal Design of High-voltage DC-cascaded Energy Storage System"(B3018K240061). （B3018K240061）
