Picture of neon light reading 'Open'

Discover open research at Strathprints as part of International Open Access Week!

23-29 October 2017 is International Open Access Week. The Strathprints institutional repository is a digital archive of Open Access research outputs, all produced by University of Strathclyde researchers.

Explore recent world leading Open Access research content this Open Access Week from across Strathclyde's many research active faculties: Engineering, Science, Humanities, Arts & Social Sciences and Strathclyde Business School.

Explore all Strathclyde Open Access research outputs...

Hybrid multilevel converter with cascaded H-bridge cells for HVDC applications : operating principle and scalability

Adam, G.P. and Abdelsalam, I.A. and Ahmed, K.H. and Williams, B.W. (2015) Hybrid multilevel converter with cascaded H-bridge cells for HVDC applications : operating principle and scalability. IEEE Transactions on Power Electronics, 30 (1). pp. 65-77. ISSN 0885-8993

[img]
Preview
Text (Adam-etal-TPEL-2014-Hybrid-multilevel-converter-with-cascaded-H-bridge-cells)
Adam_etal_TPEL_2014_Hybrid_multilevel_converter_with_cascaded_H_bridge_cells.pdf - Accepted Author Manuscript

Download (2MB) | Preview

Abstract

Hybrid multilevel converters are contemplated in an attempt to optimize the performance of voltage source converters in terms of magnitude of semiconductor losses and converter footprint, and to achieve additional features such as dc short circuit proof, which is essential for a high integrity multiterminal HVDC grid. Therefore, this paper considers an emerging hybrid cascaded converter that offers the dc side short circuit proof feature at reduced loss and footprint compared to the existing multilevel and other hybrid converters. Its operating principle, modulation, and capacitor voltage balancing strategies are described in detail. Furthermore, hybrid converter scalability to high voltage applications is investigated. The validity of the modulation and capacitor voltage strategy presented are confirmed using simulation and experimentation. The hybrid cascaded converter is extendable to a large number of cells, making it applicable to high voltage applications, and operation is independent of modulation index and power factor. On these ground, the converter is expected to be applicable for both real and reactive power applications.