Creative Commons

The scope of this thesis is to investigate the viability of implementing Hybrid Power Station (HPS) facilities in the autonomous electrical systems of Non-Interconnected Greek islands. The term HPS refers to a combined station that consist of a renewable energy power source and an energy storage facility. The first step con-sists of the research for all the available technologies for utility scale energy storage systems that can be coupled with electric generation stations from renewable sources and installed on Greek islands. The selection of the most appropriate solutions for power production and storage will be based on the maturity of each technology, energy needs of the specific location, morphology of the Greek islands and the financial pa-rameters that affect investments in this type of projects. The next step is to simulate the operation of the HPS in the system of a non-interconnected island grid. The development of algorithms for the hourly dispatch of the HPS is based on the Greek regulatory operational framework for Non-Interconnected islands. The algorithms have been developed in the of MATLAB soft-ware. From this investigatin are produced the the benefits from the operation of an HPS to the operation of the islands electric production system. Also, the simulation of HPS configurations provide the opportunity to compare HPS with different storage systems (batteries and Pumped Hydro) in order to find the most suitable solution. Finally, in order to evaluate financial viability of HPS systems at not interconnect-ed islands, a pricing policy is proposed, which is the basis for the calculation of the revenues generated from providing energy and ancillary services to isolated island electrical systems. In order to find the best approach for the development of an HPS station, a comparison between the previously selected HPS systems is conducted, with the units sized at the same capacity. Results both the HPS operation as well as for the operation of the island’s electrical system are presented in order to prove which HPS type is more beneficial for the island operation and which is the investment option is more profitable.