Title: Method and device for distinguishing transmission line fault direction
Application Number: 97125201 Application Date: 1997.12.23
Publication Number: 1195775 Publication Date: 1998.10.14
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: G01R31/08
Applicant(s) Name: Zhejiang Univ. Address: 310027
Inventor(s) Name: He Benteng, Li Ju
Attorney & Agent: lian shoujin
Abstract:
     The present invention relates to a method for recognizing fault direction of transmission line and its equipment. It is characterized by that measuring fault component of current and fault component of voltage; multiplication of both fault components and integration to obtain the fault energy, and when said energy value is negative, the fault occurs at positive direction, and when said energy value is possitive, the fault occurs at negative direction. Its correspondent equipment may use static type, also may be digital type. As compared with existent technique, said invention possesses the advantages of rapid recognizing speed, resisting fault transient harmonic interference, accurate and reliable recognizing result, and is applicable for recognizing fault direction of single-phase ground connection of high-voltage transmission line, neutral-point indirectly-grounded power transmission system and power generator, etc.
Time: 17