Study on the operating characteristic of sampled value differential protection

The sampled value differential protection is described in this paper. The selections of S, R are investigated and the basic selective rule is to ensure that the restraint effectiveness of the sampled value differential protection be equal or superior to the corresponding phasor differential protecti...

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Published inCCECE 2003 - Canadian Conference on Electrical and Computer Engineering. Toward a Caring and Humane Technology (Cat. No.03CH37436) Vol. 1; pp. 335 - 338 vol.1
Main Authors Yang Jingchao, Yin Xianggen, Chen Deshu, Zhang Ze
Format Conference Proceeding
LanguageEnglish
Published IEEE 2003
Subjects
Circuit faults
Current transformers
Fault currents
Laboratories
Protection
Samarium
Sampling methods
Steady-state
Testing
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Summary:The sampled value differential protection is described in this paper. The selections of S, R are investigated and the basic selective rule is to ensure that the restraint effectiveness of the sampled value differential protection be equal or superior to the corresponding phasor differential protection during external faults. The particular fuzzy operating zone of the proposed protection is also discussed and its expressions are presented. In addition, the phasor analyzing method, in which the phasor relationships of input currents of the protected system are used to represent the operating zone, fuzzy operating zone and restraint zone, is proposed to analyze the operating characteristic. The engineering applications and test results are also introduced.
ISBN:9780780377813
0780377818
ISSN:0840-7789
2576-7046
DOI:10.1109/CCECE.2003.1226409