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Large scale integrating of wind power generation into a grid may raise serious stability issues. In this case energy storage systems seem to be suitable for balancing power and energy between the inconstant wind parks generation and the grid. In this paper, the impact of high wind power penetration on the dynamic performance and stability of power...
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... generation is based on three (3) oil-fired thermal power units with total capacity of 700 MW approximately. Additionally, there are 23 wind parks installed with nominal power of 170MW across the island as it is depicted in Fig.1. Furthermore, 1200 small PV plants of 80kW nominal power each are already installed (Fig. 2) giving 80MW in total. ...
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High penetration levels of variable wind energy source can cause problems with their grid integration. Energy storage system connected to wind turbine/wind power plant can improve predictability of the wind power production and provide ancillary services to the grid. This paper investigates economics of different operational strategies for Li-ion s...
The increasing penetration of renewable energies is becoming a problem for the stability of the grid and the planning of electricity generation. The use of batteries in parallel to wind farms can be a very interesting issue in order to assure controlled power delivery of renewable energy sources. In this way wind energy can become in a predictable...
Citations
... Additionally, extensive research has been carried out on large-scale energy storage development in those islands. The operation of wind-pump storage units in the Cretan power system was examined in [21,22], while, in [23,24], the impact of hybrid power systems was evaluated for the Samos island power system; in [25], a hybrid power plant was utilized for Sifnos island to reach 100% energy autonomy. Currently, Ikaria island is the only Greek isolated island with a large-scale hybrid power system in operation [26]. ...
The field of energy, specifically renewable energy sources (RES), is considered vital for a sustainable society, a fact that is clearly defined by the European Green Deal. It will convert the old, conventional economy into a new, sustainable economy that is environmentally sound, economically viable, and socially responsible. Therefore, there is a need for quick actions by everyone who wants to move toward energy-efficient development and new environmentally friendly behavior. This can be achieved by setting specific guidelines of how to proceed, where to start, and what knowledge is needed to implement such plans and initiatives. This paper seeks to contribute to this very important issue by appraising the ability of full-scale implementation of RES combined with energy storage in an island power system. The Greek island power system of Astypalaia is used as a case study where a battery energy storage system (BESS), along with wind turbines (WTs), is examined to be installed as part of a hybrid power plant (HPP). The simulation’s results showed that the utilization of HPP can significantly increase RES penetration in parallel with remarkable fuel cost savings. Finally, the fast response of BESS can enhance the stability of the system in the case of disturbances.
... As a result, more than 20% of annual electricity has been produced by RES technologies. This portion can be significantly increased with the inclusion of large scale energy storage [7], with significant benefits in the financial operation of the system, as well as in its dynamic performance [8]- [9]. The last years, the Greek legislative framework provides the ability of installing hybrid power stations, which combine energy storage with RES production [10]. ...
... A dynamic performance of Crete's power system is analyzed in [39][40]. Apart from the main issues covered in previous studies, the researchers focus on the daily problem of unit commitment (UC), due to the intermittent nature of renewables. ...
... More precisely, numerous wind farms have been constructed, with an installed capacity of 170 MW. Moreover, there is a considerable amount of PV panels, with an installed capacity of 80 MW [40]. ...
... An interesting feature of the Island, is the fact that more than 50% of the total installed RES projects in Greece, are located in Crete [35]. Thus, the installed capacity is already significant on the Island, with a contribution of 18% to the annual energy net production [40]. More precisely, there are about 23 installed wind parks a total capacity of 170MW and numerous PV installations with a total capacity of 80 MW [40]. ...
Potential benefits and implications of a Demand-side Management method are examined, for the autonomous system of Crete, Island. A peak clipping method is considered, regarding the domestic A/C loads. The benefits of the method are investigated, in terms of load demand, production costs and CO2 emissions. The examination of the aforementioned parameters are based on a data synthesis procedure, which is suggested to overcome the limited availability of data. On the other hand, potential negative impacts are highlighted from a user’s perspective. The trade-off between energy consumption and thermal comfort, is discussed. In addition, the current energy profile of the Island is presented, in terms of electricity supply and demand. A range of energy issues in the context of modern power systems is highlighted and general aspects of the DSM technique are also described.
The Greek islands’ power system is fragmented into 29 autonomous electrical systems relying on oil-fired generators to supply 82% of their electricity demand. Local power grids are only allowed to absorb a maximum renewable energy share of approximately 30% to secure the stability of the network and avoid abrupt frequency alterations. Inevitably, fossil-fuel dominated, isolated systems lead to increased generation costs, high carbon intensity and frequent power cuts. A novel integrated methodological approach has been developed to address these challenges consisting of: I) Long and short-term modelling considering interconnections and energy storage in the form of batteries versus the current energy autonomy, using the PLEXOS integrated energy model (Energy Exemplar, 2019) for a projection horizon extending between 2020 and 2040. II) ISLA demand model (Spataru, 2013), adapted to the Greek islands (ISLA_EGI), preceded by an extensive data processing, to anticipate annual demand scenarios. The two models inform each other and support the analysis of 35 scenarios. III) The development of methods to simulate electromobility in PLEXOS considering various charging strategies. This analysis contextualises the impact of innovative technologies in providing feasible solutions on the Greek islands in line with the Energy Trilemma Index (security, affordability, sustainability). It was concluded that when combining submarine interconnections and batteries (Scenario IB.x.1.0.a), generation prices were reduced by 42% at the regional and 10% at the national level compared to a BAU scenario (A.y.1.0.a), while carbon dioxide equivalent (CO2eq) emissions are reduced by 99% and 74% respectively. Also, power outage events are abolished. The benefits of a High-Efficiency demand scenario produced by ISLA_EGI show further reductions of 2.5% in emissions between 2020 and 2040. The results unveil that certain small, remote systems should remain autonomous, supported by battery storage. The operation of EVs highlights that primarily V2G scenarios and occasionally, scheduled unidirectional charging bring the ultimate benefits.
