Hybrid systems of pumped storage hydropower plants and wind turbine plants

In this thesis, pumped storage type of hydropower plants and wind turbine plants were studied and a hypothetical hybrid system model that consists a combination of these two systems was parametrically analysed. The first aim of the system is to time-shift the power output of the wind turbine plant to peak demand periods by means of storage and thus realizing increase in the penetration level to the grid. Second aim is to obtain more stable power output from the wind turbine plant that has variable power output. A one-year operation simulation of the hybrid system was carried out under peak tariff strategy within the scope of the two aims. One-year power output values of the wind turbine plant was calculated and this data was employed in the simulation. Interval time was selected to be one hour. An operation simulation was also made covering only the wind turbine plant with same power output data and same demand strategy and the results were compared. Without storage wind turbine plant feeds 6.350,30 MWh of electrical energy to the grid, this value increases to 7.656,00 MWh for the hybrid system, this means that there is 17,05% increase and the system is technically applicable for the first aim. Annual stable power output ratio that shows the fulfilment of demand is approximately 72,49% for wind turbine plant without storage and this value is approximately 87,40% for the hybrid system. This means that there is 14,91% increase and the system is technically applicable for the second aim.KEYWORDS: Pumped storage hydropower plants, wind turbine plants, hybrid systems.