Title:
METHOD FOR LOCATING FAULT POINT IN TRANSMISSION LINE AND SYSTEM USING THE SAME
Document Type and Number:
Japanese Patent JP3628671
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a method and a system for locating fault points in transmission lines for improving accuracy in locating the fault points.
SOLUTION: Coordinate conversion is performed on parallel-two-line three-phase unbalanced transmission lines by a two-phase theory to determine the ratio IS1/(IS1+IR1), IR1/(IS1+IR1) of divided currents to the sum of currents at both ends of a secondary circuit of the transmission lines at the time of failure. On the basis of the ratio of divided currents of the secondary circuit and the length L of the parallel-two-line three-phase unbalanced transmission lines, the distance KS between a sending end S to a fault point (f) and the distance KR between a receiving end R and the fault point (f) are determined.
Inventors:
Takeshi Yamada
Shoichi Urano
Yoshifumi Oura
Yoshikazu Ohashi
Shoichi Urano
Yoshifumi Oura
Yoshikazu Ohashi
Application Number:
JP2002165924A
Publication Date:
March 16, 2005
Filing Date:
June 06, 2002
Export Citation:
Assignee:
THE TOKYO ELECTRIC POWER COMPANY,INCORPORATED
Konkei System Co., Ltd.
Konkei System Co., Ltd.
International Classes:
G01R31/08; H02H7/26; (IPC1-7): G01R31/08
Domestic Patent References:
| JP6347505A | ||||
| JP59211870A | ||||
| JP53107639A |
Attorney, Agent or Firm:
Aoyama Aoi
Osamu Kawamiya
Hiroshi Yamazaki
Osamu Kawamiya
Hiroshi Yamazaki