Modelling and Optimal Control of PEMFC Grid-Connected Power Generation System

According to the electrochemical, gas flow and temperature characteristics of proton exchange membrane fuel cell(PEMFC), a custom dynamic model of the PEMFC generation system is established based on PSCAD/EMTDC with consideration of the FC module efficiency and life span, and the PEMFC operation optimization algorithm and grid-connection control strategy are proposed. The FIFO algorithm is adopted in FC module operation optimization, and the equivalent FC module running time is achieved. Boost circuit and double loop control of outer voltage loop and inner current loop are adopted in DC/DC conversion section, and steady output of voltage is achieved. Constant power control strategy of double loop control of outer power loop and inner current loop is adopted in DC/AC grid-connected inverter section, and friendly and synchronous grid-connection of PEMFC grid-connected power generation system is achieved. The correctness and effectiveness of the proposed system in this paper are verified through the PSCAD/EMTDC software platform.