Samanes Pascual, Javier
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Samanes Pascual
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Javier
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Ingeniería Eléctrica, Electrónica y de Comunicación
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ISC. Institute of Smart Cities
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Publication Open Access Modeling of a droop-controlled grid-connected DFIG wind turbine(IEEE, 2022) Oraa Iribarren, Iker; Samanes Pascual, Javier; López Taberna, Jesús; Gubía Villabona, Eugenio; Ingeniaritza Elektrikoa, Elektronikoaren eta Telekomunikazio Ingeniaritzaren; Institute of Smart Cities - ISC; Ingeniería Eléctrica, Electrónica y de ComunicaciónTraditionally, to characterize the response of droop-controlled systems RMS models have been used. However, as it is demonstrated in this work, when droop control is applied to doubly-fed induction generators, RMS models do not allow to predict the system stability and dynamic response. Thus, in this article, a linearized small-signal model that overcomes the limitations of RMS models is presented. The proposed model is validated by simulation in MATLAB/Simulink demonstrating that it allows to accurately analyze the stability and dynamic response of the system under study. This model is an interesting tool that can be used in future works to design and adjust grid-forming controllers for doubly-fed induction generators.Publication Open Access Hydrogen educational activities developed by APERNA: a renewable-energy student association(Asociación Española del Hidrógeno, 2016) Berrueta Irigoyen, Alberto; San Martín Biurrun, Idoia; Samanes Pascual, Javier; Pascual Miqueleiz, Julio María; Barrios Rípodas, Ernesto; Parra Laita, Íñigo de la; Urtasun Erburu, Andoni; Sanchis Gúrpide, Pablo; Ursúa Rubio, Alfredo; Ingeniaritza Elektrikoa, Elektronikoaren eta Telekomunikazio Ingeniaritzaren; Institute of Smart Cities - ISC; Ingeniería Eléctrica, Electrónica y de ComunicaciónIn this paper, we present APERNA, a recently-created student association at Public University of Navarre (UPNA) with the aim of promotion of renewable energies.Publication Open Access Modeling solar cavity receivers: a review and comparison of natural convection heat loss correlations(Elsevier, 2015) Samanes Pascual, Javier; García-Barberena Labiano, Javier; Zaversky, Fritz; Ingeniería Eléctrica, Electrónica y de Comunicación; Ingeniaritza Elektrikoa, Elektronikoaren eta Telekomunikazio IngeniaritzarenAs the main difficulty of modeling cavity receivers is determining natural convection heat losses, this paper presents a survey of the different natural convection correlations developed by several authors to model natural convective heat losses from cavity receivers of solar thermal power tower plants. The different correlations studied for modeling convective heat losses are later compared by performing simulations on an implemented cavity receiver. For this work a model of a PS10-like cavity receiver, using Solar Salt as the heat transfer fluid, is implemented in Modelica. The simulations have shown how the results of four out of the five studied correlations do agree, while one of the analyzed correlations clearly overestimates convective heat losses for the simulations performed.Publication Open Access Robust active damping strategy for DFIG wind turbines(IEEE, 2021) Rosado Galparsoro, Leyre; Samanes Pascual, Javier; Gubía Villabona, Eugenio; López Taberna, Jesús; Ingeniaritza Elektrikoa, Elektronikoaren eta Telekomunikazio Ingeniaritzaren; Institute of Smart Cities - ISC; Ingeniería Eléctrica, Electrónica y de ComunicaciónDoubly fed induction generators (DFIGs) with an LCL filter are widely used for wind power generation. In these energy conversion systems, there is an interaction between the grid-side converter (GSC) and the rotor-side converter (RSC) control loops, the generator and the LCL filter that must be properly modeled. Such interaction between the GSC and the RSC proves to have a significant influence on the stability. Several active damping (AD) methods for grid-connected converters with an LCL filter have been proposed, nevertheless, the application of these techniques to a DFIG wind turbine is not straightforward, as revealed in this article. To achieve a robust damping irrespective of the grid inductance, this article proposes an AD strategy based on the capacitor current feedback and the adjustment of the control delays to emulate a virtual impedance, in parallel with the filter capacitor, with a dominant resistive component in the range of possible resonance frequencies. This work also proves that, by applying the AD strategy in both converters simultaneously, the damping of the system resonant poles is maximized when a specific value of the grid inductance is considered. Experimental results show the interaction between the GSC and the RSC and validate the proposed AD strategy. © 1986-2012 IEEE.Publication Open Access Energía sostenible: sin malos humos(Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2019) Samanes Pascual, Javier; Pascual Miqueleiz, Julio María; Berrueta Irigoyen, Alberto; Araiz Vega, Miguel; Catalán Ros, Leyre; Aranguren Garacochea, Patricia; Arricibita de Andrés, David; Ingeniería Eléctrica, Electrónica y de Comunicación; Institute of Smart Cities - ISC; Ingeniería; Ingeniaritza Elektrikoa, Elektronikoaren eta Telekomunikazio Ingeniaritzaren; Ingeniaritza¿Puede España ser sostenible energéticamente? Si alguna vez te has planteado esta pregunta, o quieres saber en qué gastamos la energía y de dónde podría ser obtenida, aquí encontrarás respuestas. Nuestros recursos renovables son inmensos, pero también lo es nuestro consumo. Este libro no solo se centra en analizar la situación actual y las posibilidades que las energías renovables tienen en nuestro país, sino que, presentando de forma clara los datos sobre nuestro gasto energético, permite a cada lector identificar sus mayores consumos, de tal forma que pueda considerar cómo reducirlos. Energía sostenible. Sin malos humos es la adaptación al caso español, actualizando los datos, del libro publicado hace una década por David MacKay en el Reino Unido. La sostenibilidad es hoy en día una preocupación creciente en la sociedad. Pero a menudo este interés se ve contaminado por cifras enormes que resultan muy complicadas de comprender. Además, todos hemos oído hablar en algún momento sobre pequeños gestos al alcance de nuestra mano que podrían permitir un cambio hacia un modelo sostenible. Nada más lejos de la realidad, pequeñas acciones solo permiten pequeños cambios, y el cambio de modelo energético al que nos enfrentamos requiere grandes acciones. Para deshacernos de todo este ruido, en este libro se presentan los números de forma clara y sencilla, utilizando unidades a nuestro alcance y que son comprensibles por todas las personas. Esto permite identificar de una forma mucho más personal los consumos energéticos de nuestro día a día. A lo largo de la primera parte del libro se van construyendo dos columnas: una de color rojo, que representa la agregación de consumos, y otra de color verde, que representa la capacidad de generación. Estas columnas ofrecen una comparación muy visual de la infraestructura renovable que sería necesaria para mantener nuestro ritmo de consumo energético actual. Además, utiliza números «gordos» obtenidos de la experiencia del día a día. Por ejemplo, para calcular la capacidad de generación eólica se parte de una velocidad de viento estimada a partir de la velocidad típica de un ciclista urbano. Toda esta información se encuentra en la primera parte del libro, en los capítulos del 1 al 18. Sin embargo, este libro no se centra únicamente en el análisis de la situación actual, sino que da un paso más y propone alternativas al modelo energético actual con el fin de alcanzar un modelo 100% renovable a medio plazo. Estas medidas incluyen un aumento importante en la potencia renovable instalada, un aumento en la eficiencia energética y algunos ligeros cambios en nuestro estilo de vida que permitan una reducción del consumo. Por supuesto, los tres frentes deben ser atacados al mismo tiempo. Estas propuestas se recogen en la segunda parte del libro, en los capítulos 19 a 32. Por último, este es un libro divulgativo al alcance de todas las personas, que busca transmitir toda la información de forma clara e intuitiva sin perderse en complicados cálculos. Pero si eres de los que les gustan las cuentas, al final del libro encontrarás un apartado en el que se explica de forma rigurosa muchos de los cálculos simples realizados en las primeras partes del libro. Estos apéndices técnicos forman la tercera parte del libro, son los apéndices de la A hasta la H.Publication Open Access MIMO based decoupling strategy for grid connected power converters controlled in the synchronous reference frame(IEEE, 2018) Samanes Pascual, Javier; Gubía Villabona, Eugenio; López Taberna, Jesús; Ingeniaritza Elektrikoa, Elektronikoaren eta Telekomunikazio Ingeniaritzaren; Institute of Smart Cities - ISC; Ingeniería Eléctrica, Electrónica y de Comunicación; Universidad Pública de Navarra / Nafarroako Unibertsitate PublikoaPower converters are frequently connected to the grid through a LCL filter, controlling its power transfer through a current control loop in the synchronous reference frame. In this reference frame, cross coupling terms appear between the current and voltages of the passive components, which, without a proper decoupling strategy, penalize the converter transient response and the current control adjustment. In this work, an intuitive decoupling strategy is presented to improve the dynamic behavior, based on Multiple-Input-Multiple-Output systems theory. The approach developed is particularly interesting in extremely weak grids, allowing an easier adjustment of the main controller.Publication Open Access Multisampled-capacitor-voltage active damping for parallel interleaved grid connected voltage source converters with LCL filter(IEEE, 2017) Samanes Pascual, Javier; Gubía Villabona, Eugenio; Institute of Smart Cities - ISC; Universidad Pública de Navarra / Nafarroako Unibertsitate PublikoaParallel interleaved converters for high power renewable energy systems present stability issues at the LCL resonance frequency. A multisampled measurement and filtering strategy is proposed to stabilize the system based on the capacitor voltage derivative active damping, overcoming its limitations for low switching power converters. The effects of the delays on the stability of the active damping strategy would be analysed. The solution developed is robust against grid inductance variations, ensuring the fulfilment of the stringent harmonic grid codes.Publication Open Access Robust multisampled capacitor voltage active damping for grid-connected power converters(Elsevier, 2019) Samanes Pascual, Javier; Urtasun Erburu, Andoni; Gubía Villabona, Eugenio; Petri, Alberto; Ingeniería Eléctrica, Electrónica y de Comunicación; Ingeniaritza Elektrikoa, Elektronikoaren eta Telekomunikazio Ingeniaritzaren; Universidad Pública de Navarra / Nafarroako Unibertsitate PublikoaThe derivative feedback of the capacitor voltage is one of the most extended active damping strategies, used to eliminate stability problems in grid-connected power converters with an LCL filter. This strategy is equivalent to the implementation of a virtual impedance in parallel with the filter capacitor. This virtual impedance is strongly affected by the control loop delays and frequency, creating changes in the sign of the emulated virtual resistor, and raising instability regions where the active damping is ineffective. As a consequence, the LCL resonance frequency is restricted to vary, as the effective grid inductance changes, within the active damping stability region. This is an additional restriction imposed on the LCL filter design that can compromise the achievement of an optimised design. For this reason, in this work, a different strategy is presented; by adjusting the delay in the active damping feedback path, it becomes stable within the range where the LCL resonance frequency can be located for a given filter design, achieving a robust damping. Analytical expressions are provided to adjust this delay. To widen the stability region of the capacitor voltage derivative active damping, a multisampled derivative is implemented, overcoming its limitations close to the control Nyquist frequency. Experimental and simulation results validate the active damping strategy presented.Publication Open Access Modeling a grid-forming DFIG wind turbine(IEEE, 2023-08-31) Oraa Iribarren, Iker; Samanes Pascual, Javier; López Taberna, Jesús; Gubía Villabona, Eugenio; Ingeniería Eléctrica, Electrónica y de Comunicación; Ingeniaritza Elektrikoa, Elektronikoa eta Telekomunikazio Ingeniaritza; Institute of Smart Cities - ISC; Universidad Pública de Navarra / Nafarroako Unibertsitate PublikoaThis paper presents a small-signal state-space model that allows analyzing the dynamics of doubly-fed induction generator (DFIG)-based wind turbines in which grid-forming control strategies are implemented. Specifically, in this paper, a droop-controlled DFIG wind turbine is modeled. The system is modeled in the dq-axis, synchronized with the grid voltage, which simplifies the modeling by not having to linearize the terms dependent on the rotational speed of the dq-axis. Independent models for each element of the system are obtained, which are then combined to model the complete system under study. This modeling methodology provides great flexibility, allowing for easy inclusion of the LC harmonic filter, and enabling future incorporation of the grid-side converter to analyze its interaction with the rotor-side converter. The developed model is validated through simulation, demonstrating that it accurately reproduces the dynamic response of the system under study.Publication Open Access Deadbeat voltage control for a grid-forming power converter with LCL filter(IEEE, 2023) Samanes Pascual, Javier; Rosado Galparsoro, Leyre; Gubía Villabona, Eugenio; López Taberna, Jesús; Pérez, Marcelo A.; Ingeniería Eléctrica, Electrónica y de Comunicación; Institute of Smart Cities - ISC; Ingeniaritza Elektrikoa, Elektronikoaren eta Telekomunikazio IngeniaritzarenGrid-forming power converters are controlled as voltage sources to regulate the grid voltage and frequency. These converters can increase power system strength if they impose a voltage waveform resilient to grid transients. For this reason, in this paper, we propose a deadbeat control strategy of the capacitor voltage for high power converters with LCL filter. To damp the LCL resonant poles, an active damping strategy is developed, based on a modification of the deadbeat control law. With this purpose, a notch filter is applied to the electrical variables allowing to emulate different damping resistances for the fundamental component and the harmonics. As a result, the active damping does not introduce tracking errors of the fundamental frequency component, while it provides damping to the filter resonance. The proposed strategy does not require knowledge of the grid impedance, an interesting feature in grid-connected power converters because the grid impedance is generally unknown. Experimental results validate the proposed strategy.