Case Study: Kalangala Infrastructure Services
Authors: Ekuru Ebyau Edward1, Andima Moses2 Geofrey Bakkabulindi3 Prof. Latin Okidi4
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In this study, the subject of Economic Dispatch (ED) for a hybrid power network comprising of renewable energy (662 kWp Solar PV), non-renewable diesel generators (500, 320, 200 KVA) and energy storage system (655 kWh for 10 hour) is considered. The study which sought to determine an economic operation of the hybrid system by optimizing generation, energy storage and discharge. The study also considered silent costs such as: starting, shut, ramping and storage costs for all the associated units. This ED was formulated as an optimization problem solved using Mixed Linear Integer Programing techniques (MILP). The results indicated a total daily cost of USD. 3780.9 for a total load of 7.94 MW with poor PV generation up take. The study proposed a load increase and profiles which resulted into a total generation of 10.2 MW with a cost of USD 2,065.4 with over 95% PV utilisation. Overall, the results indicate that renewable energy dispatch in a hybrid mode does not necessary present the most economical dispatch under all conditions.