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Reduced-Order Transfer Matrices From RLC Network Descriptor Models of Electric Power Grids

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5 Author(s)
Francisco Damasceno Freitas ; Department of Electrical Engineering, University of Brasilia, Brasilia, Brazil ; Nelson Martins ; Sergio Luis Varricchio ; Joost Rommes
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This paper compares the computational performances of four model order reduction methods applied to large-scale electric power RLC networks transfer functions with many resonant peaks. Two of these methods require the state-space or descriptor model of the system, while the third requires only its frequency response data. The fourth method is proposed in this paper, being a combination of two of the previous methods. The methods were assessed for their ability to reduce eight test systems, either of the single-input single-output (SISO) or multiple-input multiple-output (MIMO) type. The results indicate that the reduced models obtained, of much smaller dimension, reproduce the dynamic behaviors of the original test systems over an ample range of frequencies with high accuracy.

Published in:

IEEE Transactions on Power Systems  (Volume:26 ,  Issue: 4 )