Abstract: In the paper a new adaptive estimator of protection criterion values insensitive to wide range power system frequency changes is proposed and analysed. Its operation is based on a coarse calculation of signal frequency and appropriate correction of used orthogonal filters frequency responses as well as adaptation of chosen parameters of the measurement algorithm. The main features of the new method has been compared with standard criterion values estimators both theoretically and by simulations. The proposed estimators assure good accuracy of measurement within the frequency range from 5 to 95 Hz.

Keyword(s): adaptive estimation ; orthogonal filter ; protection
Note: Proceedings of the 11th International Conference on Power System Protection. PSP '98, Bled, Slovenia 30.September-2.October 1998. Ljubljana : Faculty of Electrical Engineering, 1998. pp. 53-58


Fulltext : http://zet10.ipee.pwr.wroc.pl/record/207/files/

Cited by: try citation search for ENY-ARTICLE-2008-160; I08/1998/I-119

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