Optimal sizing of hybrid power systems using power pinch analysis

Hybrid Power Systems (HPS) consist of different renewable generators, which produce electricity from renewable energy (RE) sources required by the load. An optimal sizing method is the key factor to achieve the technical and economical feasibility of the HPS. Power Pinch Analysis (PoPA) method has been applied to set the guidelines for proper HPS sizing. Different scenarios for RE generators allow the designers to choose the best alternative for their systems. The scenarios considered are the reduction of (1) the size of the most expensive RE generator, (2) the size of generator with the most abundant RE sources available during the time interval with large electricity surplus and (3) the size of both the most expensive and abundant RE sources available during the time interval with large electricity surplus. The results show that the first option yields the minimum capital and operating costs and results in the lowest payback period for a given set of electricity targets.