Two-Loop Controller for Maximizing Performance of a Grid-Connected Photovoltaic-Fuel Cell Hybrid Power Plant
K. Ro and S. Rahman
IEEE Trans. On Energy Conversion, vol. 13, no. 3, September 1998, pp. 276-281
Maximizing performance of a grid-connected photovol- taic (PV)-fuel cell hybrid system by use of a two-loop controller is discussed. One loop is a neural network controller for maximum power point tracking, which extracts maximum available solar power from PV arrays under varying conditions of insolation, tem- perature, and system load. A reall reactive power controller (â€œ2i)stheotherloop. TheRRFTachievesthesystemâ€™sre- quirements for real and reactive powers by controlling incoming fuel to fuel cell stacks as well as switching control signals to a power conditioning subsystem. Results of time-domain simula- tions prove not only effectiveness of the proposed computer mod- els of the two-loop controller but also its applicability for use in stability analysis of the hybrid power plant.