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Modified half-bridge modular multilevel converter for HVDC systems with DC fault ride-through capability.

Ahmed, K.H.; Aboushady, A.A.

Authors

K.H. Ahmed

A.A. Aboushady

Abstract

One of the main challenges of voltage source converter based HVDC systems is DC faults. In this paper, two different modified half-bridge modular multilevel converter topologies are proposed. The proposed converters offer a fault tolerant against the most severe pole-to-pole DC faults. The converter comprises three switches or two switches and 4 diodes in each cell, which can result in less cost and losses ompared to the full-bridge modular multilevel converter. Converter structure and controls are presented including the converter modulation and capacitors balancing. MATLAB/SIMULINK simulations are carried out to verify converter operation in normal and faulty conditions.

Start Date Oct 30, 2014
Publication Date Feb 26, 2015
Print ISSN 1553-572X
Publisher Institute of Electrical and Electronics Engineers
Pages 4676-4682
Series ISSN 1553-572X
Institution Citation AHMED, K.H. and ABOUSHADY, A.A. 2014. Modified half-bridge modular multilevel converter for HVDC systems with DC fault ride-through capability. In Proceedings of the 40th IEEE Industrial Electronics Society annual conference (IECON 2014), 30 October - 01 November 2014, Dallas, USA. Piscataway: IEEE [online], pages 4676-4682. Available from: https://doi.org/10.1109/IECON.2014.7049207
DOI https://doi.org/10.1109/IECON.2014.7049207
Keywords Modified halfbridge modular multilevel converter; HVDC systems; DC faults

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