Real-Time Simulation of VSC-based HVDC Systems using Rectification Capable Switching Function-Based 3-Level Inverter Models

Publication date : Jun 2008
Paper File : Paper-Electrimacs_2008_Opal-RT.pdf

Author(s)

Abstract

This paper presents a simulation model of a 3-level Neutral-Point Clamped IGBT inverter bridge suitable for real-time simulation testing. The model is switching-function based but also works in rectifying mode. Because of the large number of individual switches that compose such an inverter, the switching-function approach produces exceptional computational speed gain when compared to piecewise time-segment linear algorithms such as SimPowerSystems, both in off-line and real-time modes. A benchmark comparison of the model used in an HVDC-VSC application with the RT-LAB simulator has shown a 10-fold increase in hard real-time computational speed.

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