NDLI: A new selective transient protection for the ground fault of large unit-connected generators

Content Provider	IEEE Xplore Digital Library
Author	Bi Daqiang Wang Weijian Gui Lin Wang Xiangheng
Copyright Year	2002
Description	Author affiliation: Dept. of Electr. Eng. & Appl. Electron. Technol., Tsinghua Univ., Beijing, China (Bi Daqiang; Wang Weijian; Gui Lin; Wang Xiangheng)
Abstract	Based on the multi-loop circuit method of AC machine a mathematic model is established for the large unit-connected generators, namely the outlet terminal of generators connected to a common busbar, and the transient zero-sequence current and voltage of these generators are simulated and analyzed at different grounding location. Further, making use of the wavelet transform sensitively detecting the singularity of signal, the properties of their value of wavelet transform are analyzed, and a selective transient protection is proposed according to the sign and value of the modulus maxima of wavelet transform. The results of simulation and experiment verify the new protection can correctly detect the generator with ground fault, and discriminate between the internal and external faults.
Sponsorship	IEEE Power Eng. Soc. (IEEE PES) Chinese Soc. Electr. Eng. (CSEE) China Electric Power Res. Inst. IEEE/PES Beijing Chapter
Starting Page	2622
Ending Page	2626
File Size	292196
Page Count	5
File Format	PDF
ISBN	0780374592
DOI	10.1109/ICPST.2002.1047261
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2002-10-13
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Protection Circuit faults AC generators Wavelet analysis Wavelet transforms Transient analysis AC machines Mathematics Mathematical model Voltage
Content Type	Text
Resource Type	Article

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