Fault Tolerant Emergency Control to Preserve Power System Stability

Andreas Søndergaard Pedersen, Jan H. Richter, Mojtaba Tabatabaeipour, Hjörtur Jóhannsson, Mogens Blanke

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This paper introduces a method for fault-masking and system reconfiguration in power transmission systems. The paper demonstrates how faults are handled by reconfiguring remaining controls through utilisation of wide-area measurement in real time. It is shown how reconfiguration can be obtained using a virtual actuator concept, which covers Lure-type systems. The paper shows the steps needed to calculate a virtual actuator, which relies on the solution of a linear matrix inequality. The solution is shown to work with existing controls by adding a compensation signal. Simulation results of a benchmark system show ability of the reconfiguration to maintain stability
Original languageEnglish
JournalControl Engineering Practice
Pages (from-to)151–159
Publication statusPublished - 2016


  • Fault-tolerant control
  • Power system stabiliser
  • Lure system
  • Actuator faults
  • Wide-area control

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