基于参数自调节的电氢耦合系统调频控制策略研究

Research on Frequency Modulation Control Strategy of Electric-Hydrogen Coupling System Based on Parameter Self-regulation

针对含质子交换膜燃料电池(proton exchange membrane fuel cell,PEMFC)的氢储能系统频率控制问题,为提高氢储能系统的频率稳定性,提出了一种基于虚拟参数自调节的系统频率控制策略。其中,电氢耦合系统以PEMFC为依托,光伏、储能电池为辅助,通过PEMFC、光伏、储能电池三者混合向系统综合负荷供电。通过数学模型构建,观察出系统内发生微小扰动后,PEMFC及储能电池的动态响应变化,改变虚拟控制参数,调整系统内的功率分配。由于PEMFC和储能电池动态响应时间不同,对于PEMFC和储能电池采取不同的控制策略,具体体现为对PEMFC采取下垂控制,而对储能电池采取惯量控制,来达到维持系统内频率在正常范围内微小波动并趋于稳定的目的。最后,通过MATLAB/Simulink仿真平台搭建模型验证了所提策略的有效性和优越性。

In view of frequency control of Hydrogen energy storage system containing proton exchange membrane fuel cell(PEMFC),a kind of system frequency control strategy based on virtual parameter self?regulation is proposed in order to improve the frequency stability of Hydrogen energy storage system.The electric?Hydrogen coupling system is supported by PEMFC,assisted by photovoltaic(PV)and energy storage battery,and the power is supplied to the system integrated load through a mixture of PEMFC,PV and energy storage battery.Through mathematical model construction,the dynamic response changes of PEMFC and energy storage battery are observed after a small disturbance occurs in the system,and the virtual control parameters are changed to adjust the power distribution in the system.Due to different dynamic response times of the PEMFC and the storage battery,different control strategies are adopted for the PEMFC and the storage battery,which are specifically embodied in the sag control of the PEMFC and the inertia control of the storage battery in order to achieve the purpose of maintaining the frequency of the system in the normal range of small fluctuations and tend to be stable.Finally,the effectiveness and superiority of the proposed strategy is verified by setting up a model through MATLAB/Simulink simulation platform.