Load frequency control of a renewable hybrid power system with simple fuzzy logic controller

In this paper an attempt has been made to control the frequency of stand-alone hybrid power system with a simple fuzzy logic control technique which can be used to fulfill the load demand at remote areas. This hybrid system consists photovoltaic (PV) system, diesel engine generator (DEG) and micro hydro power system. The model of fuel cell system is introduced as an energy storing element to improve frequency deviation due to mismatch between power generation and load demand. The proposed methodology is simulated in MATLAB and tested for 24 hours load conditions. A comparative evaluation of frequency deviation for proposed hybrid system in presence of both control techniques reflects the improvement in frequency variation in the presence of fuzzy controller as compared to PID controller.