An operational control system was proposedudin order to control and supervise the operationsudof PV/Wind/Hydro-Diesel hybrid power generationudsystems at GSM base station sites. The control systemudwas developed in such a way that it coordinates whenudpower should be generated by renewable energy (PVudpanels, wind turbine and hydro turbine) and when itudshould be generated by diesel generators. This systemudis intended to maximize the use of the renewableenergyudsystem while limiting the use of the dieseludgenerator. The diesel generator is utilized only whenudthe demand cannot be met by the renewable energyudsources including battery bank. A developed controludsystem was used to study the operations of the hybridudPV/Wind/Hydro-Diesel energy system. The controludsimulation shows that the developed control systemudreduces the operational hours of the diesel generatorudthereby reducing the running cost of the hybrid energyudsystem and pollutant emissions. From the simulationudresult, the developed control system reduces theudoperational hours of the diesel generator from 7,106udh yr-1 to 1,786 h yr-1 saving 28,087 L of fuel annually,udand thereby preventing about 73,961 kg of CO2 fromudentering the environment of the studied area. This control system is suitable for use in a more complexudhybrid system.
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