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Title:
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Optimal voltage-support control for distributed generation inverters in RL grid-faulty networks
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Author:
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Garnica López, Miguel Andrés; García de Vicuña Muñoz de la Nava, José Luis; Miret Tomàs, Jaume; Castilla Fernández, Miguel; Guzmán Solà, Ramon
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Other authors:
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Universitat Politècnica de Catalunya. Doctorat en Enginyeria Electrònica; Universitat Politècnica de Catalunya. Departament d'Enginyeria Electrònica; Universitat Politècnica de Catalunya. Departament d'Enginyeria de Sistemes, Automàtica i Informàtica Industrial; Universitat Politècnica de Catalunya. SEPIC - Sistemes Electrònics de Potència i de Control |
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Abstract:
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© 2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. |
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Abstract:
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During grid faults, the stability and reliability of the network are compromised, and the risk of a widespread disconnection of distributed generation power facilities is increased. Distributed generation inverters must support the power system to prevent this issue. Voltage support depends substantially on the currents injected into the grid and the equivalent grid impedance. This paper considers these two aspects and proposes an optimal voltage-support strategy in RL grids. The control algorithm guarantees a safe operation of the inverter during voltage sags by calculating the appropriate reference currents according to the equivalent impedance and the voltage sag characteristics, avoiding active power oscillations, and limiting the injected current to the maximum allowed by the inverter. Consequently, the grid can be better supported since the voltage at the point of common coupling is improved and the voltage support objectives are achieved. The proposed control strategy is validated through experimental tests in different grid scenarios. Throughout the work, it is assumed that the grid impedance is known, but the proposed solution requires calculating the grid impedance angle. |
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Abstract:
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Peer Reviewed |
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Subject(s):
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-Àrees temàtiques de la UPC::Enginyeria electrònica::Electrònica de potència
-Àrees temàtiques de la UPC::Enginyeria elèctrica::Distribució d’energia elèctrica::Xarxes elèctriques
-Electric power distribution
-Reactive power (Electrical engineering)
-Distributed generation of electric power
-Active power control
-Active power oscillation cancellation
-Distributed power generation
-Maximum current injection
-Reactive power control
-Unbalanced grid faults
-Voltage ride-through
-Voltage sag
-Voltage support
-Energia elèctrica -- Distribució
-Energia elèctrica -- Generació distribuïda
-Energia elèctrica -- Generació distribuïda |
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Rights:
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Document type:
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Article - Submitted version
Article |
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Published by:
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Institute of Electrical and Electronics Engineers (IEEE)
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