A CLOSE ACCORD ON DFT BASED FREQUECY AND PHASOR ESTIMATORS USED IN NUMERICAL RELAYS | ||||
| ERJ. Engineering Research Journal | ||||
| Article 10, Volume 24, Issue 4, October 2001, Page 159-175 PDF (733.42 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/erjm.2001.71139 | ||||
 View on SCiNiTO | ||||
| Author | ||||
| H.A. Darwish | ||||
| Power System Protection Group (PSPG), Menoufiya University, Faculty of Engineering, Shehin El-Kom, Egypt. | ||||
| Abstract | ||||
| Abstract: In this paper, a close accord on the Discrete Fourier Transform (DFD technique based frequency and phasor estimations for protective numerical relays application is presented The eflectiveness of the recursive DFT, in particular, is examined via simulation corroborated by experimental verification. Possibility of error accumulation in the estimated magnitude by the recursive DFT is highlighted and novel solutions are proposed. Impuct of different input signal patterns on the algorithms' performance is further examined. In addition, effect of rate of change of input signal friquency on the estimated values is pinpointed. The testing circuit hardware is implemented using the digital signal processing technologv. The results of this studv are great& valuable for the protection engineers particularly those cuncerned with the development and implementation of numerical rela-vs | ||||
| Keywords | ||||
| Discrete Fourier Tmnsfimn (Dm; Phasor and jrequency estimation; Digital signal proce.ssing Computer relaying | ||||
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