Optimization of switching losses and capacitor voltage ripple using model predictive control of a cascaded H-bridge multi-level StatCom

Townsend, Christopher D. and Summers, Terence J. and Vodden, John Alan and Watson, Alan James and Betz, Robert E. and Clare, Jon C. (2013) Optimization of switching losses and capacitor voltage ripple using model predictive control of a cascaded H-bridge multi-level StatCom. IEEE Transactions on Power Electronics, 28 (7). pp. 3077-3087. ISSN 0885-8993

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Abstract

This paper further develops a Model Predictive Control (MPC) scheme which is able to exploit the large number of redundant switching states available in a multi-level H-bridge StatCom (H-StatCom). The new sections of the scheme provide optimised methods to trade off the harmonic performance with converter switching losses and capacitor voltage ripple. Varying the pulse placement within the modulation scheme and modifying the heuristic model of the voltage balancing characteristics allows the MPC scheme to achieve superior performance to that of the industry standard phase shifted carrier modulation technique. The effects of capacitor voltage ripple on the lifetime of the capacitors is also investigated. It is shown that the MPC scheme can reduce capacitor voltage ripple and increase capacitor lifetime. Simulation and experimental results are presented that confirm the correct operation of the control and modulation strategies.

Item Type: Article
Additional Information: (c)2014 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.
Keywords: Multi-level converters, StatCom, voltage bal┬Čancing, modulation strategy, control strategy
Schools/Departments: University of Nottingham, UK > Faculty of Engineering > Department of Electrical and Electronic Engineering
Identification Number: 10.1109/TPEL.2012.2219593
Depositing User: Burns, Rebecca
Date Deposited: 05 Jul 2017 11:02
Last Modified: 12 Oct 2017 21:10
URI: http://eprints.nottingham.ac.uk/id/eprint/43950

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