*Kalli, B. M., Tijjani, B. G., Baba, U. T. and Kalli, S.
Department of Electrical and Electronics Engineering
Ramat Polytechnic Maiduguri, Borno State, Nigeria
ABSTRACT
The paper reviewed development of a control method for a renewable energy system with fuel cell. A novel control method developed for the renewable energy system based on hydrogen and the control system is divided in two levels: a global controller that uses fuzzy logic to manage the flow of energy in the system and a pair of local controllers that are used to control the operating power of the fuel cell and the electrolyser. The finding shows that a single module of the boost converter can output 1250 W at an efficiency higher than 91 %. It was also expected that the entire boost converter, which was composed of 4 modules, could output at least 5 kW. Two control structures were compared for the local controller: a PI controller and a fuzzy logic controller. The performances of both controllers were similar, but since the PI controller is simpler to implement, it was retained as the best option.