摘要
本工作以光储氢孤岛直流微电网为研究对象,针对含电/氢混合储能系统的微电网能量流动关系复杂、安全稳定运行要求高的特点,在深入分析系统工作模式的基础上,提出了考虑蓄电池荷电状态(state of charge,SOC)和储氢罐荷氢状态(state of hydrogen,SOH)融合的分层协调控制策略。该协调控制策略能够协调光伏发电单元工作在最大功率跟踪和负载功率跟踪双模式;电解制氢单元能够自动切除和投入运行,且投入运行时能够在最小功率工作点、最大效率工作点和最大功率工作点3种模式之间自适应切换;燃料电池单元自动介入运行补充微电网的功率缺额;负载按照优先级自动投切;蓄电池荷电状态和储氢罐荷氢状态处于合理工作范围,实现了微电网优化可靠运行。不同工况下的仿真结果验证了所提协调控制策略的正确性和有效性。
In this study,an islanded DC microgrid with photovoltaic,battery,and hydrogen storage systems is investigated.Focusing on the characteristics of complex energy flow and high requirements for safe and stable operation of microgrids with electricity–hydrogen hybrid energy storage systems,a hierarchical coordinated control strategy is proposed.The fusion of the state of charge(SOC)and the state of health(SOH)are investigated by making a deep analysis of the working mode of the system.To achieve the optimal and reliable operation of the microgrid,the proposed strategy performs the following functions:First,it coordinate the photovoltaic unit to operate in dual mode:maximum power point tracking or load power tracking.Second,it enables the electrolytic hydrogen unit to be switched on and off automatically and to adaptively switch among three modes:minimum power point,maximum efficiency point,and maximum power point.Third,it coordinates the fuel cell unit to operate automatically to compensate for power shortages in the microgrid.Fourth,it allows the load to be switched automatically according to the priority.Finally,it maintains the SoC and SoH within a reasonable working range.The simulation results under different working conditions verified the effectiveness of the proposed coordinated control strategy.
作者
温素芳
赵磊
刘广忱
田桂珍
张建伟
WEN Sufang;ZHAO Lei;LIU Guangchen;TIAN Guizhen;ZHANG Jianwei(College of Electric Power,Engineering Research Centre of Large Energy Storage Technology of Ministry of Education,Inner Mongolia University of Technology,Hohhot 010080,Inner Mongolia,China;Large Energy Storage Technology Academician Expert Workstation,Hohhot 010080,Inner Mongolia,China;CHN Energy Zhunneng Group Co.,Ltd.,Ordos 010300,Inner Mongolia,China)
出处
《储能科学与技术》
北大核心
2025年第12期4743-4757,共15页
Energy Storage Science and Technology
基金
国家重点研发计划“储能与智能电网技术”专项(2024YFB2408400)
内蒙古自治区科技突围工程项目(2024KJTW0017)。
