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Adaptive controller for static reactive-power compensators in power systems

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4 Author(s)
Dash, P.K. ; Regional Engineering College, Electrical Engineering Department, Rourkela, India ; Panda, P.C. ; Sharaf, A.M. ; Hill, E.F.

The paper presents a comparison of the admittance models for static reactive-power compensators along with a microcomputer-based digital model for power-system dynamic-performance improvement. Emphasis is placed on stability, and it is shown that static reactive-power (VAr) controllers (SVCs) can provide significant benefits in terms of increased transient stability limits and improved damping in terms of synchronising power-flow oscillations. Further introduction of a simplified self tuner for the SVC can dramatically increase the power-system performance under a variety of abnormal operating conditions, such as 3-phase short circuits, load shedding, reactance switching, pole slipping and resynchronisation conditions. The self-tuning digital control for the SVC can be easily implemented on a microcomputer. Simulation results for a sample power system using an LSI-11/23 microcomputer are presented in the paper.

Published in:

Generation, Transmission and Distribution, IEE Proceedings C  (Volume:134 ,  Issue: 3 )