Generator stator single phase grounding protection method
Title：
Generator stator single phase grounding protection method
Application Number：
 02153485
Application Date：
 2002/11/29
Announcement Date：
 2003/04/16
Pub. Date：
 2008/05/07
Publication Number：
 1411116
Announcement Number：
 100386935
Grant Date：
 2008-5-7
Granted Pub. Date：
 2008-5-7
ApplicationType：
 Invention
State/Country：
 11[China|beijing]
IPC：
 H02H 7/06
Applicant(s)：
 Tsinghua Univ.
Inventor(s)：
 Bi Daqiang, Wang Xianghang, Wang Weijian
Key Words：
 Generator stator, single phase grounding, protection method
Abstract：
 This invention put forward two single phase earth protection methods for generator stator based on zero-sequence voltage fault component, both utilizing that of its terminal and neutral point, in which the first method is to utilize triple-frequency harmonic voltage fault component vector composition to make up the decision basis; the second method is to directly take the sum and difference of random value of the zero-sequence voltage fault component at both sides of its terminal and neutral point as the protect signal and brake signal to detect the stator single phase earth fault by comparing spectrum energy in the data window.
Claim：
Priority：
PCT：
LegalStatus：

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