Development of solid oxide fuel cell and batteryhybrid power generation system

Solid oxide fuel cell hybrid generation system is the best scheme for the load tracking ofoff-grid monitoring stations. But there are still potential problems that need to beaddressed: preventing fuel starvation and ensuring thermal safety while meeting loadtracking in hybrid power generation system. In order to solve these problems, a feasiblehybrid power generation system structure scheme is proposed which combined SOFCsubsystem and Li-ion battery subsystem. Then a model of the hybrid power generationsystem is built based on the proposed system structure. On this basis, an adaptivecontroller, include the adaptive energy management algorithm and current feedforwardgas supply strategy, is applied to manage the power-sharing in this hybrid system as wellas keep the system operating within the safety constraints. The constraints, includingmaintaining the bus voltage at the desired level, keeping SOFC operating temperature insafety, and mitigating fuel starvation are explicitly considered. The stability of the pro-posed energy management algorithm is analyzed. Finally, the developed control algorithmis applied to the hybrid power generation system model, the operation result proves thefeasibility of the designed controller strategy for hybrid generation system and effectivelyprevent fuel starvation and ensure thermal safety