Title:
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Flexible control of power flow in multiterminal DC grids using DC-DC converter
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Author:
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Rouzbehi, Kumars; Candela García, José Ignacio; Luna Alloza, Álvaro; Gharehpetian, Gevorg B.; 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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This paper proposes an efficient control framework that utilizes dc-dc converters to achieve flexible power flow control in multiterminal dc (MTDC) grids. The dc-dc converter employed in this paper is connected in cascade with the dc transmission line, and is therefore named cascaded power flow controller (CPFC). In this paper, a two-layer control strategy is developed for the operation and control of voltage source converter stations and CPFC station in MTDC grids. At the primary control layer, a novel differential voltage droop control is developed, while at the secondary control layer, a modified dc power flow algorithm-employing the new CPFC framework-is implemented. The overall control strategy enables the CPFC to regulate the power flow in the dc transmission line. The primary control guarantees the transient stability of the CPFC, and the secondary control system ensures the desired steady-state operation. The proposed voltage droop control framework helps the MTDC grid to remain stable in the event of a communication failure between the primary and secondary control layers. Static analysis and dynamic simulations are performed on the CIGRE B4 dc grid test system, in order to confirm the effectiveness of the proposed control framework for power flow regulation in MTDC grids. |
Abstract:
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Peer Reviewed |
Subject(s):
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-Àrees temàtiques de la UPC::Enginyeria electrònica::Electrònica de potència::Convertidors de corrent elèctric -Àrees temàtiques de la UPC::Energies::Energia elèctrica::Automatització i control de l'energia elèctrica -Electric current converters -DC-to-DC converters -Electric power distribution--Direct current -Voltage regulators -CIGRE B4 dc grid -dc power flow control -multiterminal dc (MTDC) grid -power system control -voltage droop control -Convertidors continu-continu -Energía elèctrica -- Distribució -- Corrent continu -Convertidors de corrent elèctric -Reguladors de voltatge |
Rights:
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Document type:
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Article - Submitted version Article |
Published by:
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Institute of Electrical and Electronics Engineers (IEEE)
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