Title:
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An enhancing fault current limitation hybrid droop/V-f control for grid-tied four-wire inverters in AC microgrids
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Author:
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Heredero Peris, Daniel; Chillón Antón, Cristian; Pagès Giménez, Marc; Montesinos Miracle, Daniel; Santamaria, Mikel; Rivas, David; Aguado, Monica
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Other authors:
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Universitat Politècnica de Catalunya. Departament d'Enginyeria Elèctrica; Universitat Politècnica de Catalunya. CITCEA - Centre d'Innovació Tecnològica en Convertidors Estàtics i Accionaments |
Abstract:
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Microgrid integration and fault protection in complex network scenarios is a coming challenge to be faced with new strategies and solutions. In this context of increasing complexity, this paper describes two specific overload control strategies for four-wire inverters integrated in low voltage four-wire alternating current (AC) microgrids. The control of grid-tied microgrid inverters has been widely studied in the past and mainly focused on the use of droop control, which hugely constrains the time response during grid-disconnected operation. Taking into account the previous knowledge and experience about this subject, the main contribution of these two proposals regards providing fault current limitation in both operation modes, over-load capability skills in grid-connected operation and sinusoidal short-circuit proof in grid-disconnected operation. In the complex operation scenarios mentioned above, a hybrid combination of AC droop control based on dynamic phasors with varying virtual resistance, and voltage/frequency master voltage control for grid-(dis)connected operation modes are adopted as the mechanism to enhance time response. The two proposals described in the present document are validated by means of simulations using Matlab/Simulink and real experimental results obtained from CENER (The National Renewable Energy Centre) experimental ATENEA four-wire AC microgrid, obtaining time responses in the order of two-three grid cycles for all cases. |
Subject(s):
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-Àrees temàtiques de la UPC::Enginyeria elèctrica -Àrees temàtiques de la UPC::Enginyeria elèctrica::Distribució d’energia elèctrica -Àrees temàtiques de la UPC::Energies::Energia elèctrica -Electric networks -Electrical engineering -Microgrids -Control strategies -Three-phase four-wire systems -Fault current limitation -Xarxes elèctriques -Enginyeria elèctrica |
Rights:
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Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/ |
Document type:
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Article - Published version Article |
Published by:
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Multidisciplinary Digital Publishing Institute
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