Title:
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Control of D-STATCOM during unbalanced grid faults based on DC voltage oscillations and peak current limitations
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Author:
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Khoshooei, Arash; Moghani, Javad S.; Candela García, José Ignacio; Rodríguez Cortés, Pedro
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Other authors:
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Universitat Politècnica de Catalunya. Departament d'Enginyeria Elèctrica; Universitat Politècnica de Catalunya. SEER - Sistemes Elèctrics d'Energia Renovable |
Abstract:
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The safe operation of grid connected power converters during abnormal condition is a key issue in order to guarantee its operation and to avoid undesired trips. In this paper different control strategies for the operation of a D-STATCOM are introduced, where the reference currents are determined in such a way that not only none of the phase currents goes over the limits, but also the DC voltage fluctuations remain in safe operation limit. Fluctuating active power interchange, during unbalanced condition leads to DC voltage oscillation. Severe unbalanced condition and small DC capacitor selection (to meet the size and cost constraints) intensify the DC voltage oscillation. Therefore, the contribution of this paper lays on the combination of the DC voltage oscillations and the current limit control. The effectiveness of three proposed control strategies are verified by simulating a D-STATCOM tied to an industrial distribution network. Moreover a scaled scenario has been reproduced experimentally which shows that the results cope well with the analytical equations and the simulation results. |
Abstract:
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Peer Reviewed |
Subject(s):
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-Àrees temàtiques de la UPC::Energies::Energia elèctrica::Automatització i control de l'energia elèctrica -Electric current converters -Electric power distribution--Direct current -Electric fault location -Electric power failures -current control -DC voltage oscillations -D-STATCOM -negative sequence -reactive power -safe operation -Convertidors de corrent elèctric -Corrents continus -Sistemes de distribució d'energia elèctrica -- Estabilitat |
Rights:
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Document type:
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Article - Submitted version Article |
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