Selective harmonic elimination methods for a cascaded H-bridge converter

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Watson, Alan James (2009) Selective harmonic elimination methods for a cascaded H-bridge converter. PhD thesis, University of Nottingham.

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Abstract

In recent years there has been an increased demand for integration of renewable energy into the electricity grid. This has increased research into power converter solutions required to integrate renewable technology into the electricity supply. One such converter is a Cascaded H-Bridge (CHB) Multilevel Converter.

Operation of such a topology requires strict control of power flow to ensure that energy is distributed equally across the converters energy storage components. For operation at high power levels, advanced modulation methods may be required to ensure that losses due to non-ideal semiconductor switching are minimised, whilst not compromising the quality of the voltage waveform being produced by the converter.

This thesis presents several low switching frequency modulation methods based on Selective Harmonic Elimination (SHE) in order to address these two operational issues. The methods presented involve manipulating the H-Bridge cell voltages of the CHB converter to control power flow. Simulated results are supported by experimental verification from a seven level, single phase CHB converter.

Item Type: Thesis (University of Nottingham only) (PhD)
Supervisors: Wheeler, P.W.
Clare, J.C.
Keywords: Electric current converters, harmonics (electric waves)
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK7800 Electronics
Faculties/Schools: UK Campuses > Faculty of Engineering > Department of Electrical and Electronic Engineering
Item ID: 14139
Depositing User: EP, Services
Date Deposited: 22 Apr 2014 07:55
Last Modified: 15 Dec 2017 23:09
URI: https://eprints.nottingham.ac.uk/id/eprint/14139

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