Pedersen, Andreas Søndergaard1; Richter, Jan H.4; Tabatabaeipour, Mojtaba1; Jóhannsson, Hjörtur1; Blanke, Mogens1
1 Department of Electrical Engineering, Technical University of Denmark2 Automation and Control, Department of Electrical Engineering, Technical University of Denmark3 Center for Electric Power and Energy, Department of Electrical Engineering, Technical University of Denmark4 Siemens AG
Stabiliser faults in multi-machine power systems are examined in this paper where fault-masking and system reconguration of the nonlinear system is obtained using a virtual actuator approach. Phasor Measurement Units, which can be integrated in wide-area transmission grids to improve the performance of power system stabilisers, are utilised when reconguring remaining stabilisers after one has been inoperable by a local failure. A stabilitypreserving reconguration is designed using absolute stability results for Lure type systems: The calculation of the virtual actuator that relies on a solution of a linear matrix inequality (LMI) is detailed in the paper. Simulation results of a benchmark transmission system show the ability of the fault-tolerant reconguration strategy to maintain wide-area stability of a power system despite failure in a stabiliser.
Ifac Proceedings Volumes, 2014
Power-system stabilisers; Fault-tolerant systems; System failure and recovery; Absolute stability
Main Research Area:
I F a C Workshop Series
19th World Congress of the International Federation of Automatic Control (IFAC 2014)