Study on the operating characteristic of sampled value differential protection

Author

Jingchao, Yang ; Xianggen, Yin ; Deshu, Chen ; Ze, Zhang

Author_Institution

Huazhong Univ. of Sci. & Technol., China

Volume

1

fYear

2003

fDate

4-7 May 2003

Firstpage

335

Abstract

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.

Keywords

fuzzy set theory; power system faults; power system protection; fuzzy operating zone; fuzzy restraint zone; phasor analyzing method; phasor differential protection; sampled value differential protection; Circuit faults; Current transformers; Fault currents; Laboratories; Protection; Samarium; Sampling methods; Steady-state; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical and Computer Engineering, 2003. IEEE CCECE 2003. Canadian Conference on

ISSN

0840-7789

Print_ISBN

0-7803-7781-8

Type

conf

DOI

10.1109/CCECE.2003.1226409

Filename

1226409