Optimisation of battery-integrated diesel generator hybrid systems using an ON/OFF operating strategy

This paper reports on the development of an optimisation algorithm based upon a genetic algorithm for the operation and control of battery-integrated diesel generator hybrid systems. The ON/OFF operating strategy has been applied to the diesel generator with the aim of minimizing the operation cost, subject to the load energy requirements as well as to the diesel generator and the battery operational constraints. The simulations have been performed using “Intlinprog” in MATLAB, and the results provide optimal generator setting and battery charging/discharging schedules for any given daily load profile. The model has been applied to two test examples and the simulation results shows that by using the hybrid system and taking into account the non-linearity in daily load demand and fuel consumption curve, more operation costs can be saved compared to the case where the diesel generator is used alone.