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Fault positioning system and method for distribution line

A distribution line, fault location technology, applied in the direction of fault location, information technology support system, fault detection by conductor type, etc.

Active Publication Date: 2020-05-19
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention proposes a fault location system and method for distribution lines, which solves the technical problems of fast fault location and improved fault location accuracy when single-phase ground faults and latent faults occur in distribution networks

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  • Fault positioning system and method for distribution line
  • Fault positioning system and method for distribution line
  • Fault positioning system and method for distribution line

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Embodiment Construction

[0071] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Apparently, the described embodiments are only some of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0072] figure 1 A schematic structural diagram of a fault location system for distribution lines provided by an embodiment of the present invention, as shown in figure 1 As shown, the system includes a signal generating device 3 , a plurality of partial discharge detection sensors 4 , a control center 5 and a plurality of coupling capacitors 2 . Wher...

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Abstract

The invention provides a fault positioning system and method for a distribution line. The fault positioning system comprises a signal generation device, a plurality of partial discharge detection sensors and a control center, wherein the signal generation device is connected with calibration interfaces of the partial discharge detection sensors and used for injecting a first pulse signal into a to-be-detected distribution line, a second pulse signal is generated when the distribution line breaks down, the partial discharge detection sensors are sequentially installed along the distribution line in a segmented mode, one end is connected with one end of a coupling capacitor, the other end is grounded for collecting analog voltage signals, first pulse signals and second pulse signals in the distribution line, and the control center is used for receiving, analyzing and processing the analog voltage signals, the first pulse signals and the second pulse signals, and calculating to obtain thedistance information and the fault position information of mounting positions of two adjacent partial discharge detection sensors. The system is advantaged in that the system can achieve quick and precise positioning of the fault position of the power distribution line, and is efficient, intelligent and convenient.

Description

technical field [0001] The invention belongs to the technical field of grid fault detection and location, and in particular relates to a fault location system and method for power distribution lines. Background technique [0002] The distribution network is the supply and demand link connecting the transmission network and power users. The distribution network belongs to the end of the power system and directly faces users. It is an important public infrastructure serving people's livelihood. The line length of the distribution network accounts for about 90% of the line length of the power grid at all levels. It has the characteristics of many changes in line structure and complex fault conditions. Statistics show that more than 80% of power outages are caused by distribution network faults. Seriously affect the safe and stable operation of the power grid. In severe cases, it will cause large-scale power outages in key areas, causing huge losses to the national economy and p...

Claims

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Application Information

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IPC IPC(8): G01R31/08G01R31/12
CPCG01R31/086G01R31/088G01R31/1272Y04S10/52
Inventor 刘红文王科张恭源柴晨超张春丽张扬
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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