Browsing by Author "f32b0e49-5440-4020-8ad4-c9da8b783d4f"
Now showing items 1-20 of 163
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A communication-free reactive-power control strategy in VSC-HVDC multi-terminal systems to improve transient stability
Renedo Anglada, Javier; Rouco Rodríguez, Luis; García Cerrada, Aurelio; Sigrist, LukasThis paper proposes a new reactive-power control strategy for High Voltage Direct Current multi-terminal systems with Voltage Source Converter stations (VSC-HVDC) to improve transient stability in electric power transmission ... -
A communication-free reactive-power control strategy in VSC-HVDC multi-terminal systems to improve transient stability
Renedo Anglada, Javier; Rouco Rodríguez, Luis; García Cerrada, Aurelio; Sigrist, Lukas (01/09/2019)This paper proposes a new reactive-power control strategy for High Voltage Direct Current multi-terminal systems with Voltage Source Converter stations (VSC-HVDC) to improve transient stability in electric power transmission ... -
A Corrective Load Shedding Scheme to Mitigate Voltage Collapse
Echavarren Cerezo, Francisco; Lobato Miguélez, Enrique; Rouco Rodríguez, Luis (01/01/2006)Voltage stability is concerned with the ability of a power system to maintain acceptable voltages at all buses. A measure of the power system voltage stability is the distance to the saddle node bifurcation of the power ... -
A high frequency power transformers model for network studies and tdsf monitoring
López Fernández, Xosé Manuel; Rouco Rodríguez, Luis; Álvarez-Mariño, Casimiro; Gago García, Hugo; Vila Montañés, CarlosIn this paper a high frequency power transformer model for network studies is presented. The model combines white and black box representations in a package implemented as compiled foreign model of MODELS language of ... -
A method for the design of UFLS schemes of small isolated power systems
Sigrist, Lukas; Egido Cortés, Ignacio; Rouco Rodríguez, Luis (01/05/2012)This paper presents a systematic method for the design of robust and efficient underfrequency load-shedding (UFLS) schemes. UFLS schemes play an important role in protecting the system integrity. The systematic method ... -
A monovoltage equivalent model of bi-voltage autotransformer-based electrical systems in railways
Pilo De La Fuente, Eduardo; Rouco Rodríguez, Luis; Fernández Cardador, Antonio; Abrahamsson, Lars (01/04/2012)This paper presents an equivalent model that allows representing bi-voltage autotransformer based systems (such as 2x25kV AC, 2x15kV AC) as if they were mono-voltage systems. This model can be used for symmetrical (such ... -
A power flow solvability identification and calculation algorithm
Echavarren Cerezo, Francisco; Lobato Miguélez, Enrique; Rouco Rodríguez, Luis (01/01/2006)This paper presents a continuation and optimization based algorithm to detect power flow unsolvability. In addition, the algorithm obtains the power flow solution, if it exists, no matter how ill-conditioned the power ... -
A practical approach to solve power system constraints with application to the Spanish electricity market
Lobato Miguélez, Enrique; Rouco Rodríguez, Luis; Gómez San Román, Tomás; Echavarren Cerezo, Francisco; Navarrete Fernández, María Isabel; Casanova Lafarga, Rosa; López Camino, Gerardo (01/11/2004)The solution of power system constraints is an important issue that has to be addressed to achieve a fair operation of a competitive electricity market. In the Spanish electricity market, the System Operator (SO) is in ... -
A review of the state of the art of UFLS schemes for isolated power systems
Sigrist, Lukas; Rouco Rodríguez, Luis; Echavarren Cerezo, Francisco (01/07/2018)This paper presents a review of the state of the art of UFLS schemes for isolated power systems. Isolated power systems are especially sensitive to power imbalances and underfrequency load-shedding (UFLS) schemes are crucial ... -
A sensitivities computation method for reconfiguration of radial networks
González García, Alezeia; Echavarren Cerezo, Francisco; Rouco Rodríguez, Luis; Gómez San Román, Tomás (01/08/2012)Distribution networks are operated in a radial configuration, but their topology, especially in urban areas, is normally meshed in order to improve reliability of supply. This makes it possible to configure the network ... -
A simplified algorithm to solve optimal power flows in hybrid VSC-based AC/DC systems
Renedo Anglada, Javier; Ibrahim, Ahmad Asrul; Kazemtabrizi, Behzad; García Cerrada, Aurelio; Rouco Rodríguez, Luis; Zhao, Quanyu; García González, JavierHigh Voltage Direct Current systems based on Voltage Source Converters (VSC-HVDC) are increasingly being considered as a viable technology with advantages, above all when using underground or submarine cables for bulk power ... -
A simplified algorithm to solve optimal power flows in hybrid VSC-based AC/DC systems
Renedo Anglada, Javier; Ibrahim, Ahmad Asrul; Kazemtabrizi, Behzad; García Cerrada, Aurelio; Rouco Rodríguez, Luis; Zhao, Quanyu; García González, Javier (01/09/2019)High Voltage Direct Current systems based on Voltage Source Converters (VSC-HVDC) are increasingly being considered as a viable technology with advantages, above all when using underground or submarine cables, for bulk ... -
A tool for computation of electrical losses in wind farms grids
Rouco Rodríguez, Luis; Campos Norte, Ignacio; Hernández Alarcón, Marta; Pérez Campion, Juan Carlos; Gómez de Olea, IgnacioAccurate calculation of electrical losses of wind farm grids is needed in the economic evaluation of wind generation projects. This paper describes a tool for computation of electrical losses in wind farm grids. It makes ... -
A tool for simulation, analysis and design of underfrequency load-shedding (UFLS) schemes of isolated power systems
Sigrist, Lukas; Egido Cortés, Ignacio; Rouco Rodríguez, Luis; Rodríguez Velázquez, Alfredo; Castro, Cristobal; Rupérez, Jesús; Marín Fernández, SantiagoIsolated power systems are especially sensitive to generation-load imbalances. The small size, the relatively low inertia, and the comparatively large generation in-feeds make them more vulnerable to frequency instability ... -
A tool for simulation, analysis and design of underfrequency load-shedding (UFLS) schemes of isolated power systems
Sigrist, Lukas; Egido Cortés, Ignacio; Rouco Rodríguez, Luis; Rodríguez Velázquez, Alfredo; Castro, Cristobal; Rupérez, Jesús; Marín Fernández, SantiagoIsolated power systems are especially sensitive to generation-load imbalances. The small size, the relatively low inertia, and the comparatively large generation in-feeds make them more vulnerable to frequency instability ... -
A tool for the assessment of the electromagnetic forces in power distribution transformers
Da Costa Lopes, Andrey; Sanz Bobi, Miguel Ángel; Rouco Rodríguez, Luis; Palacios Hielscher, Rafael; Flores Losada, Luis; Cirujano Ballesteros, Pablo (01/10/2011)This paper compares the estimated electromagnetic forces due to short circuits in power transformers using two computational models. The first model is based on approximate analytical expressions of the electromagnetic ... -
A WACS exploiting generator Excitation Boosters for power system transient stability enhancement
Díez Maroto, Luis; Vanfretti, Luigi; Almas, Muhammad Shoaib; Jónsdóttir, Guðrún M.; Rouco Rodríguez, Luis (01/07/2017)Excitation Boosters (EB) are designed to improve transient stability of synchronous generators equipped with bus fed static excitation systems. They can be controlled using either local or remote signals following a ... -
Active power control strategies for transient stability enhancement of AC/DC grids with VSC-HVDC multi-terminal systems
Renedo Anglada, Javier; García Cerrada, Aurelio; Rouco Rodríguez, Luis (01/11/2016)Multi-terminal High Voltage Direct Current (HVDC) using Voltage Source Converters (VSC-HVDC) is a promising technology which provides flexible control of active and reactive power and facilitates remote renewable energy ... -
Ajuste de protecciones frente a faltas monofásicas en líneas de media tensión en redes con neutro puesto a tierra a través de reactancia
Rouco Rodríguez, Luis; Torres Santana, Jose Antonio; García Muñoz, José Manuel; Sánchez Paz, Javier (01/04/2014)El ajuste de las protecciones de neutro de las líneas de media tensión de distribución es de gran importancia para asegurar la calidad del suministro de de energía eléctrica ya que las faltas monofásicas a tierra son las ... -
Alternativas en la protección frente a faltas a tierra en líneas de media tensión de distribución en redes con neutro puesto a tierra a través de reactancia
Rouco Rodríguez, Luis; Torres Santana, Jose Antonio; García Muñoz, José Manuel; Sánchez Paz, Javier (13/07/2016)Este artículo discute alternativas en la protección frente a faltas a tierra en líneas de media tensión de distribución en redes con neutro puesto a tierra a través de reactancia en una instalación concreta analizada ...