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An expert fuzzy control approach to voltage stability enhancement

Udupa, Narendranath A and Thukaram, D and Parthasarathy, K (1999) An expert fuzzy control approach to voltage stability enhancement. In: Electrical Power and Energy Systems, 21 (4). pp. 279-287.

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The voltage stability control problem has become an important concern for utilities transmitting power over long distances. This paper presents a new approach using fuzzy set theory for reactive power control with the purpose of improving the voltage stability of a power system. Voltage stability index and controlling variables are translated into fuzzy set notations to formulate the relation between voltage stability level and controlling ability of controlling devices. Control variables considered are switchable VAR compensators, OLTC transformers and generator excitations. A fuzzy rule based system is formed to select the controllers, their movement direction and step size. The developed fuzzy system is tested on a few simulated practical Indian power systems and modified IEEE 30 bus system. The performance of the fuzzy system is compared with conventional optimization technique and results obtained are encouraging. Results obtained for a 82 node Indian power network and modified IEEE 30 bus system are presented for illustration purposes.

Item Type: Journal Article
Publication: Electrical Power and Energy Systems
Publisher: Elsevier Science
Additional Information: Copyright of this article belongs to Elsevier Science.
Keywords: Voltage stability;Fuzzy Control Logic;IEEE 30 bus system;82 node network.
Department/Centre: Division of Electrical Sciences > Electrical Engineering
Date Deposited: 19 Jul 2009 05:49
Last Modified: 19 Sep 2010 04:59
URI: http://eprints.iisc.ac.in/id/eprint/17927

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