Optimal Load-frequency Regulation of BioRenewable Cogeneration based Interconnected Hybrid Microgrids with Demand Response Support

This work is an earliest attempt to study the load-frequency regulation of Wind, Solar-thermal, Microhydro, Biogas, and Biodiesel generating unit based interconnected hybrid microgrids with Demand response support. The linearized models of each renewable units are established for the proposed interconnected two-unequal hybrid microgrid system along with demand response strategies. The load-frequency responses of the proposed system are studied using Particle swarm optimization tuned classical PID controllers for different scenarios of source and load variations. Initially, the responses of system with microhydro and biogas units, are studied, subsequently connecting Wind and Solar-thermal units, which witness the increment in oscillations with penetration of renewable units. Then, the oscillations are reduced optimally by the inclusion of biodiesel generator and demand response supports. Finally, the responses are studied for simultaneous variations in renewable-sources and load-demands, reporting satisfactory regulation of load frequency with demand response contributions.