摘要
针对电氢耦合系统运行时单体燃料电池输出功率有限和工作效率低难以维持系统在复杂工况下稳定运行的问题,研究了多堆燃料电池系统(multi-stack fuel cell system,MFCS)功率分配策略,提出了一种计及多堆燃料电池功率分配的电氢耦合分层能量管理策略,将控制系统分为状态机控制层和设备控制层。以燃料电池运行效率最优为目标设计了多堆燃料电池功率分配方法,上层为状态机控制层,采集系统剩余功率、锂电池荷电状态(state of charge,SOC)和储氢罐氢状态(state of hydrogen,SOH),并将系统状态分为8种,下层为设备控制层,接收状态机发送的开关信号控制各设备选择不同的控制模式运行,使燃料电池尽可能运行于正常区间,提高燃料电池寿命和工作效率,减少系统运行状态的切换、提升电氢耦合系统抗扰动能力和光伏利用效率。基于Simulink平台仿真验证了所提分层控制策略的正确性。
To address the issues of limited output power in single fuel cells and the low efficiency of electric-hydrogen coupling systems in maintaining stable operation under complex conditions,this paper investigates the power allocation strategy for multi-stack fuel cell systems(MFCS)and proposes an electric-hydrogen coupling layered energy management strategy that considers the power allocation of multi-stack fuel cells.A layered energy management strategy is introduced,dividing the control system into a state-machine control layer and a device control layer.The multi-stack fuel cell power allocation method is designed to optimize fuel cell efficiency.The upper layer,the state-machine control layer,collects data on residual system power,the state of charge(SOC)of the lithium battery,and the state of hydrogen(SOH)in the hydrogen storage tank.The lower layer,the equipment control layer,receives switching signals from the state machine to control each device,selecting different control modes.This allows the fuel cells to operate within their normal range as much as possible,improving their life and efficiency,reducing system state switching,enhancing the system's anti-disturbance capabilities,and efficiently utilizing photovoltaics.Simulations based on the Simulink platform verified the effectiveness of the proposed hierarchical control strategy.
作者
李建林
石泽林
陈来军
LI Jianlin;SHI Zelin;CHEN Laijun(National User-Side Energy Storage Innovation Research and Development Center(North China University of Technology),Beijing 100144,China;New Energy(Photovoltaic)Industry Research Center(Qinghai University),Xining 810016,China)
出处
《电力建设》
CSCD
北大核心
2024年第11期79-88,共10页
Electric Power Construction
基金
国家自然科学基金项目(52277211)
青海省基础研究计划项目(2023-ZJ-704)。
关键词
电氢耦合
多堆燃料电池系统
分层控制策略
状态机控制
electric-hydrogen coupling
multistack fuel cell system
hierarchical control strategy
state machine control
