Method for improving fault location precision of traveling wave method

A technology of fault distance measurement and traveling wave method, which is applied in the direction of fault location, fault detection according to conductor type, and electrical measurement. It can solve the problems of complex traveling wave solution method and large error, and achieve the advantages of simple ranging process and improved accuracy. Effect

Inactive Publication Date: 2020-06-19
南京辉腾电子科技有限公司
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Problems solved by technology

[0005] In order to solve the technical problem of complex and large error in the solution method of traveling wave for multiple measurements, the present invention provides a method for improving the accuracy of fault location by traveling wave method. The solution of wave velocity is simple, the error is small, and the accuracy of fault location is improved

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  • Method for improving fault location precision of traveling wave method

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Embodiment Construction

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0019] A method for improving the fault distance measurement accuracy of the traveling wave method of the present invention is to place a line fault measuring instrument in each of the two sections of the long line; use the double-ended traveling wave method to extract the relative time of the fault, and the two fault measuring instruments are connected to each other through the optical fiber. When the fault occurs, the two fault measuring instruments determine...

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Abstract

The invention discloses a method for improving fault location precision of a traveling wave method, and particularly relates to a method for accurately locating a long line fault of a power system through a double-end traveling wave method. According to the method, a line fault measuring instrument is arranged on each of two sections of a long line, relative time during a fault is extracted by using a traveling wave method; the time synchronization and time accuracy of the two fault measuring instruments are required to be 1 microsecond when the two fault measuring instruments pass through optical fibers, when a fault occurs, the two fault measuring instruments determine the time when fault point traveling waves are transmitted to the measuring instrument on the same side by extracting thecharacteristic values of the fault traveling waves, and the distance of a fault point is calculated through the time difference of the two measuring instruments.

Description

technical field [0001] The invention belongs to the field of line fault location by the double-terminal traveling wave method, and in particular relates to a method for improving fault distance measurement accuracy by the traveling wave method. Background technique [0002] Accurate fault location can not only reduce the burden of line inspection, but also speed up the recovery of power supply and reduce the comprehensive economic loss caused by power outages. Therefore, accurate fault location of transmission lines is very important. [0003] Accurate positioning of transmission line faults can reduce fault inspection time and help restore industrial and residential power consumption. Among many fault location methods, the traveling wave ranging method has strong adaptability and is less affected by fault type grounding resistance, etc. The advantages have become a hot spot for scholars at home and abroad. [0004] Transmission line fault location technology is mainly base...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/08
CPCG01R31/085G01R31/088
Inventor 王维琴
Owner 南京辉腾电子科技有限公司
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