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Mostrando ítems 1-20 de 24
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A fundamental study on the impact of HVDC lines on transient stability of power systems
Sigrist, Lukas; Echavarren Cerezo, Francisco; Rouco Rodríguez, Luis; Panciatici, Patrick (Eindhoven University of Technology (Eindhoven, España), 29/06/2015)An increasing number of HVDC lines are currently deployed all around the world. HVDC links are either based on line-commutated converters (LCC) or on voltage-source converters (VSC) technologies. This paper presents a ... -
A simplified approach to detect undervoltage tripping of wind generators
Sigrist, Lukas; Rouco Rodríguez, Luis (Eindhoven University of Technology (Eindhoven, España), 29/06/2015)This paper proposes a simplified but fast approach based on a Norton equivalent of wind generators to detect undervoltage tripping of wind generators. This approach is successfully applied to a real wind farm. Today, most ... -
A tool for optimal operation and design of batteries and its applications to self-consumption
Fernández de Bobadilla, Jose María; Lobato Miguélez, Enrique; Sigrist, Lukas; González García, AlezeiaThis paper presents a tool for optimal operation and design of batteries and its applications to self-consumption. The recent improvements in capabilities and costs of battery storage technologies might enable new business ... -
Barriers regarding scalability and replicability of smart grid projects
May, Kristof; Vingerhoets, Pieter; Sigrist, Lukas (Instituto Superior de Engenharia de Lisboa (Lisboa, Portugal), 20/05/2015)This paper assesses the scalability and replicability of smart grid projects, by means of the identification of limitations and barriers faced by these projects. Factors have been identified that impact a project s scalability ... -
Battery energy storage integration in wind farms: Economic viability in the Spanish market
Lobato Miguélez, Enrique; Sigrist, Lukas; Ortega Manjavacas, Álvaro; González García, Alezeia; Fernández Roldán, José M. (2022-12-01)Este trabajo propone una herramienta de evaluación económica que determina la viabilidad de una batería de energía sistema de almacenamiento (BESS) integrado dentro de plantas de energía renovable para diferentes aplicaciones ... -
Design of underfrequency load-shedding schemes of small isolated power systems
Sigrist, Lukas (2010)This dissertation addresses the problem of designing robust and efficient underfrequency load-shedding (UFLS) schemes of small isolated power systems. UFLS schemes are a well-established remedy against frequency ... -
Development of a PSS/E tool for power-flow calculation and dynamic simulation of VSC-HVDC multi-terminal systems
Renedo Anglada, Javier; García Cerrada, Aurelio; Rouco Rodríguez, Luis; Sigrist, Lukas; Egido Cortés, Ignacio; Sanz Verdugo, Silvia -
Dynamic virtual power plant: a new concept for grid integration of renewable energy sources
Marinescu, Bogdan; Gomis Bellmunt, Oriol; Dörfler, Florian; Schulte, Horst; Sigrist, Lukas (12/09/2022)The concept of Virtual Power Plant (VPP) has arisen over a decade ago from the relatively low competitiveness of the back then emerging non-dispatchable RES. A set of smaller generators imitates the behavior of large ... -
Energy storage systems for frequency stability enhancement in small-isolated power systems
Egido Cortés, Ignacio; Sigrist, Lukas; Lobato Miguélez, Enrique; Rouco Rodríguez, Luis; Barrado Sánchez, Alberto Carlos; Fontela Martínez, Pablo; Magriñá Sole, Jordi (European Association for the Development of Renewable Energies, Environment and Power Quality; Unive (La Coruña, España), 25/03/2015)Frequency stability is one of the most relevant issues in operation of small isolated power systems. High penetration of renewals may significantly affect frequency stability of isolated power systems since renewable energy ... -
Impact of AC-line-emulation controllers of VSC-HVDC links on inter-area-oscillation damping
Renedo Anglada, Javier; Rouco Rodríguez, Luis; Sigrist, Lukas; García Cerrada, Aurelio -
Improving scalability and replicability of smart grid projects
May, Kristof; Sigrist, Lukas; Vingerhoets, Pieter; Morch, Andrei; Verboven, Peter; Rouco Rodríguez, Luis (Association des Economistes de l'Energie (París, Francia), 04/06/2015)Today most smart grid projects are still in the R&D or the demonstration phases on small scale. The condition that these projects are implemented in the future on a large scale is that they have a suitable degree of ... -
Inclusion of Frequency Nadir constraint in the Unit Commitment Problem of Small Power Systems Using Machine Learning
Rajabdorri, Mohammad; Kazemtabrizi, Behzad; Sigrist, Lukas; Lobato Miguélez, EnriqueDado que se pretende reducir la cantidad de generación térmica y aumentar la cuota de energía limpia, los sistemas eléctricos son cada vez más susceptibles de sufrir inestabilidad de frecuencia tras las interrupciones ... -
Liquid Air Energy Storage Model for Scheduling Purposes in Island Power Systems
Rajabdorri, Mohammad; Sigrist, Lukas; Lobato Miguélez, Enrique (2022-09-22)Avanzar hacia la generación de energía limpia parece esencial. Para ello, la penetración de las energías renovables está creciendo en los sistemas eléctricos. Aunque fuentes de energía como la eólica y la solar son limpias, ... -
Liquid air energy storage model for scheduling purposes in island power systems
Rajabdorri, Mohammad; Sigrist, Lukas; Lobato Miguélez, Enrique (22/09/2022)Moving towards clean energy generation seems essential. To do so, renewable energy penetration is growing in the power systems. Although energy sources such as wind and solar are clean, they are not available consistently. ... -
Modelling of VSC-HVDC multi-terminal systems for small-signal angle stability analysis
Renedo Anglada, Javier; Sigrist, Lukas; García Cerrada, Aurelio; Rouco Rodríguez, LuisThis paper presents a model for small-signal analysis (SSA) of the angle stability of hybrid high-voltage AC (HVAC) systems containing high-voltage DC multi-terminal systems based on Voltage Source Converters (VSC-HVDC). ... -
Modelling of VSC-HVDC multi-terminal systems for small-signal angle stability analysis
Renedo Anglada, Javier; Sigrist, Lukas; García Cerrada, Aurelio; Rouco Rodríguez, Luis (Institution of Engineering and Technology (Coventry, Reino Unido), 05/02/2019)This paper presents a model for small-signal analysis (SSA) of the angle stability of hybrid high-voltage AC (HVAC) systems containing high-voltage DC multi-terminal systems based on Voltage Source Converters (VSC-HVDC). ... -
Operation of isolated power systems under high shares of renewables
Sigrist, Lukas (Espace Méditerranéen de Technologie et d’Innovation (Rabat, Marruecos), 05/12/2018)The increasing penetration of large shares of renewable energy resources allows reducing system operation costs of island power systems. However, operation of island power systems is also challenged by this increasing ... -
Overview of the solutions developed by the GRID+ project for supporting the European smart grids pilot projects in achieving the EEGI goals: main findings and lessons learnt
Losa, Ilaria; de Nigris, Michelle; Bissel, Gareth; Varela Sanz, Jesús; Sigrist, Lukas; Galant, Serge (Association des Economistes de l'Energie (París, Francia), 04/06/2015)The present paper aims at summarizing the main results and the tools that were developed in the framework of the GRID+ project1 to support the work of the European Energy Grid initiatives (EEGI) and to support smart grids ... -
Robust frequency constrained UC using data driven logistic regression for island power systems
Rajabdorri, Mohammad; Lobato Miguélez, Enrique; Sigrist, Lukas (2022-11-28)Se introduce una restricción lineal basada en datos para mejorar la frecuencia posterior a la avería. Se obtiene un conjunto de datos simulando la respuesta en frecuencia del sistema. A continuación, se emplea la regresión ... -
Robust frequency constrained uc using data driven logistic regression for island power systems
Rajabdorri, Mohammad; Lobato Miguélez, Enrique; Sigrist, Lukas (01/12/2022)In the current practice of short-term power scheduling, online power reserves are used to address generation mismatches and contingencies. Neither online inertia nor the speed of the committed units is considered in the ...