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Transient capability assessments of HVDC voltage source converters

Adam, Grain Philip and Finney, Stephen and Bell, Keith and Williams, Barry (2012) Transient capability assessments of HVDC voltage source converters. In: Proceedings of the 2012 IEEE Power and Energy Conference Power at Illinois (PECI). IEEE, pp. 1-8. ISBN 978-1-4577-1683-6

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Abstract

This paper assesses the transient capabilities of HVDC transmission systems based on two-level, neutral-point clamped, two-switch modular, and H-bridge modular multilevel voltage source converters. This investigation aims to identify voltage source converter topologies that may operate safely in steady-state and survive ac and dc network disturbances, with minimum impact on overall system stability. In this assessment, detailed switching models of the aforementioned converters are used to model HVDC converter stations, with all associated controllers incorporated (active power, current and ac voltage controllers, and cells capacitor voltage balancing). A detailed comparison that highlights the major performance differences between these converters is presented.