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

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

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 compared 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.

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

• Conference Name: 40th IEEE Industrial Electronics Society annual conference (IECON 2014)
• Conference Location: Dallas, USA
• Start Date: Oct 29, 2014
• End Date: Nov 1, 2014
• Acceptance Date: Jun 30, 2014
• Online Publication Date: Nov 1, 2014
• Publication Date: Feb 26, 2015
• Deposit Date: Jul 20, 2016
• Publicly Available Date: Jul 20, 2016
• Print ISSN: 1553-572X
• Publisher: Institute of Electrical and Electronics Engineers (IEEE)
• Pages: 4676-4682
• Series ISSN: 1553-572X
• DOI: https://doi.org/10.1109/IECON.2014.7049207
• Keywords: Modified halfbridge modular multilevel converter; HVDC systems; DC faults
• Public URL: http://hdl.handle.net/10059/1543