Optimization of switching losses and capacitor voltage ripple using model predictive control of a cascaded H-bridge multilevel statcom

Christopher D. Townsend; Terrence J. Summers; John Vodden; Alan J. Watson; Robert E. Betz; Jon C. Clare

doi:10.1109/TPEL.2012.2219593

Optimization of switching losses and capacitor voltage ripple using model predictive control of a cascaded H-bridge multilevel statcom

Christopher D. Townsend, Terrence J. Summers, John Vodden, Alan J. Watson, Robert E. Betz, Jon C. Clare

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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 multilevel H-bridge StatCom (H-StatCom). The new sections of the scheme provide optimized methods to tradeoff 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 are 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.

Original language	English
Article number	6307885
Pages (from-to)	3077-3087
Number of pages	11
Journal	IEEE Transactions on Power Electronics
Volume	28
Issue number	7
DOIs	https://doi.org/10.1109/TPEL.2012.2219593
Publication status	Published - Jul 2013
Externally published	Yes

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10.1109/TPEL.2012.2219593

Townsend et al., 2013 Optimization of switching
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Accepted author manuscript, 1.32 MBLicence: Other

Cite this

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AU - Betz, Robert E.

AU - Clare, Jon C.

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Optimization of switching losses and capacitor voltage ripple using model predictive control of a cascaded H-bridge multilevel statcom

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