Development of a PV-Wind hybrid system installation on Pserimos islet for the electricity supply of neighbor islands

Abstract

On the remote islet of Pserimos, which is located on the southern Greek Aegean sea a hybrid system is planned to be installed targeting to cover a share of the electricity needs of two neighbor islands, Cos and Calymnos. The transfer of the produced electricity will be achieved with the use of submarine cables, which will be linked with Cos and Calymnos common local grid, since both islands are already cabled with each other. The hybrid system will be consisted of Photovoltaic units and wind turbines, targeting towards to the substitution of the existed fossil fueled power plants with green renewable energy. The aim of this Master Thesis is to perform a data analysis based on the wind and irradiation conditions that prevail on Pserimos, targeting to the prediction of the electricity production that will be gained from hybrid’s system installation. Moreover, a geographical research of the islet was performed revealing the most favorable surface positions for the units placement, that will lead to increased electricity output. Furthermore, a monthly comparison between the electricity demand of Cos and Calymnos and the produced electricity obtained from Pserimos was investigated, in order to estimate the system’s supplied covering share. The study revealed that the expected annual energy yield obtained from the hybrid system will be around 92.18GWh, an amount able to cover the 27.85% of the yearly electricity islands need, which was calculated to be 348.64GWh. The electricity produced from the Photovoltaic units will reach the amount of 20.43GWh, whereas the turbines will contribute significantly more generating around 71.75GWh of electricity. Summer is considered as the most energy productive season due to increased irradiation and wind speed level, leading to an electricity output of 32.93GWh, which constitutes the 36% of the total annual electricity production. The goal of this study is to prove that renewables can play a key role in the electricity needs of the non-grid connected islands, reducing their fossil fuel dependency and promoting sustainability