Samanes Pascual, Javier

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https://academica-e.unavarra.es/handle/2454/49952

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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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0000-0002-0192-3814

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88821

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811008

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2020 - 20233
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Start date: 2020 × Subject: Frequency response ×

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Now showing 1 - 3 of 3
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    PublicationOpen Access
    Small-signal stability analysis of power converters with optimal pulsewidth modulation strategies
    (IEEE, 2023-08-31) Rosado Galparsoro, Leyre; 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 Publikoa
    Optimal pulsewidth modulation strategies are commonly used in power electronics applications with closed-loop controllers. However, there is a lack of specific studies in the literature that analyze and study the dynamics of these modulators, which makes it difficult to derive small-signal models for stability analysis and controller design. Moreover, in many studies, the influence of optimal pulsewidth modulation on the small-signal stability analysis is disregarded. This article addresses these issues by proposing a modeling methodology for optimal pulsewidth modulators, applied to a selective harmonic elimination modulator. The proposed methodology is based on the frequency response analysis, which is particularly convenient for controller design. The study shows that the classical zero-order hold model employed for carrier-based pulsewidth modulators is valid for characterizing the dynamics of optimal pulse-width modulation strategies. Simulation results validate this conclusion.
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    PublicationOpen Access
    Sub-synchronous resonance damping control strategy for DFIG wind turbines
    (IEEE, 2020) Samanes Pascual, Javier; Gubía Villabona, Eugenio; López Taberna, Jesús; Burgos, Rolando; Ingeniaritza Elektrikoa, Elektronikoaren eta Telekomunikazio Ingeniaritzaren; Institute of Smart Cities - ISC; Ingeniería Eléctrica, Electrónica y de Comunicación
    Doubly-fed induction generator (DFIG) wind turbines connected to capacitive series-compensated transmission lines are prone to exhibit oscillatory behavior. The phenomena is called sub-synchronous resonances (SSRs), as these oscillations occur at frequencies below the fundamental component. This paper first develops a modeling methodology for DFIG wind turbines, based on impedance matrices, that is applied to model a real wind farm where SSRs were reported. The stability analysis performed shows how the interaction between the grid-side converter and the rotor-side converter contribute to the instability of DFIG wind energy conversion systems connected to series compensated grids. With this model, we propose a simple sub-synchronous resonance control strategy based on an orthogonal proportional action applied to the rotor currents, and a variable gain in the PI controller adjusted as a function of the DFIG rotational speed. This control strategy depends only on the rotor currents, which are local and already measured variables in any DFIG wind turbine, and is implemented in the rotor side converter, so it does not imply an additional cost at wind farm or wind turbine level and can be applied to any DFIG wind energy conversion system (WECS). Additionally, it proves to be robust for any line impedance series compensation level, and it does not need real-time information concerning the grid at which the wind turbine is connected, or its parameters. A real case study is considered, where the sub-synchronous resonance damping strategy presented in this work is able to stabilize the system for every possible line impedance compensation level.
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    PublicationOpen Access
    Sub-synchronous resonance damper based on the stator voltage feedback for DFIG wind turbines
    (IEEE, 2020) Samanes Pascual, Javier; Rosado Galparsoro, Leyre; Gubía Villabona, Eugenio; López Taberna, Jesús; Ingeniaritza Elektrikoa, Elektronikoaren eta Telekomunikazio Ingeniaritzaren; Institute of Smart Cities - ISC; Ingeniería Eléctrica, Electrónica y de Comunicación
    Doubly-fed induction generator (DFIG) wind turbines connected to series compensated grids are prone to sub-synchronous resonance (SSR) instability. In this paper we develop a model to analyze SSRs and propose a damping strategy based on the stator voltage feedback that is implemented in the rotor-side converter (RSC). The control strategy is based on local variables that are already measured, so it is applicable to any new or existing DFIG wind turbine. Simulation results performed fora real wind farm where sub-synchronous resonances were reported validate the proposed damping strategy.