Comparison of LMI based H2 control designs for VSC-HVDC Transmission
| Authors: | Durrant Martyn, Technical University of Hamburg, Germany
Aleksic Katarina, University of Nis, Serbia and Montenegro, Yugoslavia
Werner Herbert, Technical University of Hamburg, Germany
Abbott Keith, Areva T&D Ltd, United Kingdom |
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| Topic: | 6.3 Power Plants and Power Systems |
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| Session: | Power Plants and Power Systems Modelling and Control |
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| Keywords: | Power transmission, multi-variable feedback control, uncertain linear systems, robust stability, robust performance |
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Abstract
The design of a robust controller for a VSC HVDC terminal using LMI based robust H2 and multi-objective H2 -Hinf design methods is described. The operating range of the terminal is first characterised as an uncertainty region around a linear nominal model using the operating points of a non-linear model. The performance and robustness of controllers designed using the two methods and the effects of approximations in the uncertainty region definition are then described and compared. The best trade-off between robustness and performance on the non-linear model is demonstrated to be achieved using the robust H2 method.
