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Published Article / I08/2003/I-091 ENY-ARTICLE-2008-159

Efficient Frequency-Adaptive Amplitude Tracking Algorithms for Protection Purposes

Rebizant, W (Institute of Electrical Power Engineering, Wroclaw University of Technology, Poland) ; Rusek, B (Institute of Electrical Power Systems, Darmstadt University of Technology, Germany)


Abstract: The new, fast and adaptive algorithms for measurement of signal amplitude for protection and control purposes are presented. The algorithms are intended for amplitude tracking of the distorted sinusoidal signals with varying frequency. Contradictory requirements of selective measurement of the fundamental frequency component parameters and algorithm application in off-nominal frequency conditions become reconciled due to introduction of the adaptivity idea. Wide frequency band features of the estimators are obtained by adaptive on-line changes of the orthogonal filter parameters (data window length) and coefficients in the measurement equations according to the observed actual frequency being tracked with special but simple digital procedure. The developed algorithms have been tested with MATLAB and EMTP-ATP generated signals. Practical implementation of the adaptive scheme on the TMS signal processor is also described.

Keyword(s): amplitude estimation ; protective relaying ; adaptive signal processing ; frequency independent algorithms
Note: 2003 IEEE Bologna PowerTech Proceedings , Bologna, Italy, June 23-26, 2003, ref. BTPO3-12

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Cited by: try citation search for ENY-ARTICLE-2008-159; I08/2003/I-091

Record created 2008-09-19, last modified 2008-09-20

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