Evaluating the effect of wind-hydro hybrid power stations on the operation of Cretan power system

Tsikalakis, Antonis G.; Katsigiannis, Yiannis A.; Karapidakis, Emmanuel; Fiorentzis, Konstantinos

doi:10.1109/upec.2017.8231945

Cited by 6 publications

(4 citation statements)

References 10 publications

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“…Los Sistemas de Energía Híbridos son la combinación de generación de energía con fuentes renovables y/o convencionales [2]. El uso de estos sistemas se da sobre todo en áreas rurales donde la demanda de energía no es muy alta [3], como por ejemplo en islas donde sus características geográficas dificultan y vuelven muy costosa la interconexión con otros sistemas de abastecimiento de energía robustos por lo tanto la implementación de Sistemas Híbridos de generación es una gran opción [13]. Con los sistemas de energía híbridos, la capacidad de las energías renovables puede aumentar significativamente en redes autónomas saturadas y puede también proporcionar confiabilidad a los sistemas sustituyendo los altos costos al momento de cubrir la demanda de energía en horas pico [14].…”

Section: Sistemas De Energía Híbridosunclassified

Evaluación de la pre factibilidad para la generación de energía eléctrica mediante la sinergia entre las energías eólica y almacenamiento por bombeo de agua en la isla San Cristóbal - Galápagos

Burbano¹,

Narváez

2021

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Este documento expone una investigación que tiene como objetivo aportar a la mitigación del cambio climático, además de buscar autonomía energética basándose en Energías Renovables. Por tal motivo esta investigación evalúa la prefactibilidad de un sistema de almacenamiento de energía renovable basado en bombeo de agua en la isla San Cristóbal - Galápagos, donde se tiene una fuente de energía almacenada debido a la diferencia de nivel disponible en la laguna El Junco. Se realizan los cálculos en base a la curva de demanda de la isla durante el año 2018, contando con que se desea cubrir el pico de dicha demanda de energía de la noche que se encuentra entre las 16h00 y las 22h00. Se calculan los tanques de almacenamiento de acuerdo al volumen requerido además de las características que deben tener los generadores de energía. Para el retorno del agua usada en la generación se calcula un sistema de bombeo en base a la energía obtenida por medio del recurso eólico de San Cristóbal, mismo que corresponde a 3 aerogeneradores de los cuales se analiza su curva de potencia, y junto con la velocidad promedio del viento por hora durante el año 2018, se obtiene la energía entregada por los aerogeneradores para realizar el bombeo requerido, además de las características de las bombas. Los resultados muestran que la propuesta es viable en vista de que se cubre la demanda del pico de la noche, considerando que la energía usada es netamente renovable.

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Section: Sistemas De Energía Híbridosunclassified

Evaluación de la pre factibilidad para la generación de energía eléctrica mediante la sinergia entre las energías eólica y almacenamiento por bombeo de agua en la isla San Cristóbal - Galápagos

Burbano¹,

Narváez

2021

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“…A large number of conventional units with different technologies and response characteristics (steam turbines, Internal Combustion Engines (ICE), Open Cycle Gas Turbines (OCGT), and one combined cycle (CC) unit with total capacity of 824.8 MW have been installed in three power stations, namely Xylokamara, Linoperamata and Atherinolakos, on the island as is depicted in Figure 3. In Table 1, the capacity per unit type and power station is provided [35]. (7) As was mentioned, the results of this study have been classified per month and per hour type.…”

Section: The Power System Of Cretementioning

confidence: 99%

Improving Reliability Indices of the Autonomous Power System of Crete Island Utilizing Extended Photovoltaic Installations

et al. 2019

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Renewable energy sources (RES) have significantly helped in meeting the electricity demand of Crete, with their share in the energy balance to account for about 25% of the annual electricity production for the past five years. The contribution of photovoltaics (PVs) has been especially significant for the past three years, offering 10% in the peak demand, during summertime. This paper investigates what the capacity credit would be, i.e., up to what extent increasing existing PV capacity by about 20% can be considered as certain, to avoid installing thermal power units. In order to do so, probabilistic techniques have been applied to quantify the load that the installed thermal units in the Cretan power system should be able to meet at any time. In addition, the effect of the additional PV capacity to power system's reliability is evaluated, introducing a new reliability index and taking into account actual data, regarding the planned and unplanned thermal units' maintenance. Two scenarios have been examined using actual hourly data for load demand, PV, and wind production from the island power system of Crete. In the first scenario, the calculations were carried out considering the operation of the Cretan power system in its current state, while in the second scenario it was assumed that the PV production has been increased by 20%. Furthermore, we examine how the maximum value of capacity credit can be achieved as the PV installations are extended. In this regard, there is an upper limit of the additional PV capacity that leads to the maximum value of capacity credit.Energies 2020, 13, 64 2 of 15 much widespread in any power system as PVs as they are not modular with the exception of solar dishes [9] and face more sitting constraints than PVs. This is the reason for focusing on PVs and their potential reliability impact on island power systems like Crete.There have been numerous studies regarding the potential benefits of PVs already since 90 s. In [10] the value of PVs for voltage support, loss, and peak reduction, distribution systems are studied while comparisons are made with the conventional and widely used methods for voltage control and loss minimization. In another study [11], the value of PVs for society have been examined from both the consumer and the utility perspective, claiming that the decentralized PV systems have a higher value for the society due to the fact that the customers are involved in their own electricity supply. Generally, the presence of solar electricity resources, such as any other distributed generation, can eliminate or delay the need for investments on transmission or distribution grid level [12]. According to a past study [13], strategically sited PVs provide grid support to substation transformers by reducing their oil temperature due to the lower demand caused by PV.PVs have greatly helped in electrifying rural areas such as in middle northeast Africa and southeast Asia countries [14], Honduras [15], and desert regions [16], as an alternative to grid extension or fossil fuels....

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“…For the past years, Crete's energy demands have been satisfied mostly with conventional means of production, as well as renewable energy sources (RES) [1]. However, the RES share was relatively low in the island's energy mix primarily due to their unpredictable output that is dependent on local weather conditions [2].…”

Section: Introductionmentioning

confidence: 99%

Introduction of optimal photovoltaic and wind power balance algorithm in power systems

Karapidakis,

Nikologiannis,

Konstantinidis

et al. 2023

E3S Web Conf.

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Since 2021, Crete has been connected to the mainland’s power system grid providing security regarding load peak demand and intra-day fluctuations. The grid provides, also, the opportunity to take full advantage of it in order to alter the island’s energy mix, making the island’s power system more climate neutral and reduce the emissions produced by conventional power production means. In the current paper, the utilization of mathematical models and a few numerical solution algorithms lead to the optimization of the power production of RES, under certain constraints regarding the system’s rejections. The approximation of each optimal solution for all three cases is satisfactory, which is, for the first two cases, an immediate result of the linear properties of the objective function that expresses the annual production of RES in each case. Those linear properties prevent each approximated solution from deviating from the problem’s feasible region, while, also, permitting the use of optimization techniques which can be easily implemented and require very little computational time. For the third case, a search algorithm has been designed and implemented, yielding accurate, yet low-precision solutions, which approximate sufficiently the optimal ones.

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Evaluating the effect of wind-hydro hybrid power stations on the operation of Cretan power system

Cited by 6 publications

References 10 publications

Evaluación de la pre factibilidad para la generación de energía eléctrica mediante la sinergia entre las energías eólica y almacenamiento por bombeo de agua en la isla San Cristóbal - Galápagos

Evaluación de la pre factibilidad para la generación de energía eléctrica mediante la sinergia entre las energías eólica y almacenamiento por bombeo de agua en la isla San Cristóbal - Galápagos

Improving Reliability Indices of the Autonomous Power System of Crete Island Utilizing Extended Photovoltaic Installations

Introduction of optimal photovoltaic and wind power balance algorithm in power systems

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