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Tricarico, Gioacchino (author), Azuara-Grande, Luis Santiago (author), Wagle, Raju (author), Gonzalez-Longatt, Francisco (author), Dicorato, Maria (author), Forte, Giuseppe (author), Rueda, José L. (author)The operation schedule of the power generation units in electrical power systems is determined by the optimisation problem known as unit commitment (UC), aiming at minimising the total cost considering the generation constraints. To obtain a feasible solution from the network perspective, the security-constrained UC (SCUC) problem has been...conference paper 2022
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Ramos, Andres (author), Rivier, Michel (author), Garcia-Gonzalez, Javier (author), Latorre, J. M. (author), Morales-Espana, G. (author)In this paper, we propose a method to analyze the amount of operation reserves procured in a system based on two stages. The first stage is a detailed hourly unit commitment and the second stage is a simulation model with a shorter time period. The method is applied to the Spanish hydrothermal system and several cases are analyzed to determine...conference paper 2016
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Morales-Espana, G. (author), García-González, Javier (author), Ramos, Andrés (author)Reserves are playing each time a more important role due to the massive penetration of renewable energy sources nowadays. Operating reserves must be used for unforeseen events. All predictable events must be directly considered in the scheduling stage otherwise there will be an inefficient and unnecessary use of reserves that increases system...conference paper 2012
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Tricarico, Gioacchino (author), Wagle, Raju (author), Azuara-Grande, Luis Santiago (author), Gonzalez-Longatt, Francisco (author), Dicorato, Maria (author), Forte, Giuseppe (author), Rueda, José L. (author)The dispatch schedule of the electrical power plant units is the result of the solution to the unit commitment optimisation problem, and it minimises the cost of production considering pre-defined technical limits. The security-constrained unit commitment problem has been defined as including the network constraints in the previously mentioned...conference paper 2022
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Nasri, A. (author)Nowadays, power systems are dealing with some new challenges raised by the major changes that have been taken place since 80’s, e.g., deregulation in electricity markets, significant increase of electricity demands and more recently large-scale integration of renewable energy resources such as wind power. Therefore, system operators must make...doctoral thesis 2014
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Morales-Espana, G.A. (author), Gentile, C. (author), Ramos, A. (author)This paper provides the convex hull description for the basic operation of slow- and quick-start units in power-based unit commitment (UC) problems. The basic operating constraints that are modeled for both types of units are (1) generation limits and (2) minimum up and down times. Apart from this, the startup and shutdown processes are also...journal article 2015
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- Ummels, B.C. (author), Gibescu, M. (author), Pelgrum, E. (author), Kling, W.L. (author), Brand, A.J. (author) journal article 2007
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Morales-Espana, G. (author), Baldick, Ross (author), García-González, Javier (author), Ramos, Andres (author)This paper proposes a power-based network-constrained unit commitment (UC) model as an alternative to the traditional deterministic UCs to deal with wind generation uncertainty. The formulation draws a clear distinction between power-capacity and ramp-capability reserves to deal with wind production uncertainty. These power and ramp requirements...journal article 2015
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Akbari, Amirhossein (author), Alavi-Koosha, Ahmadreza (author), Moradi Sepahvand, M. (author), Toulabi, Mohammadreza (author), Amraee, Turaj (author), Bathaee, Seyyed Mohammad Taghi (author)This article presents an electric vehicle (EV)-integrated security constrained unit commitment (EV-SCUC) based on N−1 criteria for single line outage contingency under intermittency of load and renewable energy sources (RESs). Two EV control mechanisms are proposed. In first, EV balance control, financial targets are prioritized while...journal article 2023
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Morales-Espana, G. (author), Ramirez Elizondo, L.M. (author), Hobbs, Benjamin F. (author)Approximations made in traditional day-ahead unit commitment model formulations can result in suboptimal or even infeasible schedules for slow-start units and inaccurate predictions of actual costs and wind curtailment. With increasing wind penetration, these errors will become economically more significant. Here, we consider inaccuracies from...journal article 2017
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Morales-Espana, G. (author), Lorca, Álvaro (author), de Weerdt, M.M. (author)The increasing penetration of uncertain generation such as wind and solar in power systems imposes new challenges to the unit commitment (UC) problem, one of the most critical tasks in power systems operations. The two most common approaches to address these challenges — stochastic and robust optimization — have drawbacks that restrict their...journal article 2018
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Correa-Posada, Carlos M. (author), Morales-Espana, G. (author), Dueñas, Pablo (author), Sánchez-Martín, Pedro (author)The growing increase of renewable generation worldwide is posing new challenges for a secure, reliable and economic operation of power systems. In order to face the uncertain and intermittent production of renewable sources, operating reserves must be allocated efficiently and accurately. Nowadays, these reserves are mainly assigned to thermal...journal article 2017
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Philipsen, R.M. (author), Morales-Espana, G. (author), de Weerdt, M.M. (author), De Vries, Laurens (author)Day-ahead electricity markets are inefficient due to their coarse discretisation of time and their representation of electricity production and consumption in energy per time interval. This leads to excessive costs and infeasible schedules in the market clearing results. Some real-world systems have increased the resolution to improve accuracy,...journal article 2019
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Ntotas, K. (author)This report will focus on one important aspect of the transitional wave towards the future, which is the current issue of large-scale wind integration within the power system. The approach aims to illustrate the significance that international exchange can play in wind power's integration and it will be assisted by a computational tool, PowrSym3...master thesis 2008
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Renson, P.I.A. (author)This master thesis aims at improving the understanding of the factors affecting the cost and emission impacts of wind operations using an engineering- economic (unit commitment) model and generator performance data based on actual US and other country experience, and to analyze the impact of incentive mechanisms on wind power participation in...master thesis 2013
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Nguyen, T.K.L. (author)This master thesis aims at understanding the impact of wind on day-ahead-market (DAM) electricity prices using an integrated engineering-economic model. A realistic case study has been implemented, which is Electric Reliability Council of Texas (ERCOT) in Texas, U.S. in the month of August, 2014. To address the main research question of wind ?s...master thesis 2015
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- Barsoum, I. (author) master thesis 2014
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Sağdur, Yasin (author)In an energy-only market, private investors play a crucial role in realizing the security of supply. However, several specific characteristics inherent to his market design cause concern about whether this market design is suitable for system adequacy. Moreover, due to policy goals aimed at working towards low-carbon energy systems, these...master thesis 2021
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Zuiderveen Borgesius, Freek (author)To limit global warming to 2 degrees Celsius in 2100, the European power sector needs to transform. Renewable energy capacity is required to reach this ambition, together with transmission and storage capacity to maintain grid stability. Carbon capture and storage could potentially decrease the required renewable energy capacity, while...master thesis 2017
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Torres Sanchez, Luiscarlos (author)The urgent transition to other forms of energy production, delivery and consumption has induced investments in new technologies such as renewable energy sources, storage units and demand response programs. Investments in these assets represent long-term commitments (e.g. 40 years ahead) from civil society, governmental institutions and capital...master thesis 2020
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