A fuzzy logic system for steady-state security analysis of power networks

Article type: Research Article

Authors: Kaymak, U. | Babuška, R. | Nauta Lemke, H.R. van | Honderd, G.

Affiliations: Faculty of Information Technology and Systems, Control Laboratory, Delft University of Technology, P.O. Box 5031, 2600 GA Delft, The Netherlands. Tel.: +31 15 2783371; Fax: +31 15 2786679; E-mail: U.Kaymak@et.tudelft.nl

Abstract: A fuzzy logic rule-based system for assessing steady-state security of a power network with a ring structure is presented. The system uses the measurements of the network state, the information about the network configuration, physical knowledge about the system and rules to determine the security class. The security is determined in a hierarchical manner, first at the component level and then at the network level. The rules are obtained from experts in the field of power systems, and describe the approximate behavior of the network based on knowledge about the physical principles and the network topology. A new defuzzification operator is introduced, which allows the fuzzy logic system to follow different strategies such as risk aware operation. A graphical interface has been built for realizing effective interaction with the operators. The developed system has been tested on the 380 kV Dutch transmission network and it has been found that the classification corresponds to the opinion of experienced operators as to the security class.

Journal: Journal of Intelligent and Fuzzy Systems, vol. 6, no. 3, pp. 345-359, 1998