Check patentability & draft patents in minutes with Patsnap Eureka AI!

Distribution network grounding short-circuit fault distance detection method

A fault distance, grounding short-circuit technology, applied in fault location, fault detection according to conductor type, information technology support system, etc. Work efficiency, fast positioning and locking, the effect of reducing ergonomics

Inactive Publication Date: 2021-02-19
GUIZHOU POWER GRID CO LTD
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, after the fault trip of the distribution network in our country, there is no research on the fault current to judge the fault area, resulting in many faults that take a long time to find out
The earliest research applied to the detection in the distribution network, only the mechanical insulation shaker is used to check the ground fault, and it is still widely used. In recent years, my country has introduced digital test insulation megger, including wide DC tester, can The application technology of converting the fault tripping current into the fault distance is to pull down the branch line switch and the main line section switch to eliminate one by one when the line is in hot standby state. The point of failure is difficult, and it takes longer to find invisible faults (usually 1-2 days)

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Distribution network grounding short-circuit fault distance detection method
  • Distribution network grounding short-circuit fault distance detection method
  • Distribution network grounding short-circuit fault distance detection method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1: as Figure 1-5 As shown, a distribution network grounding short-circuit fault distance detection system includes a central control unit, a translation module, a drive module, a voltage sampling module, a range conversion module, a signal conditioning module, a current sampling module and a current limiting circuit module, a translation module, a voltage The sampling module, the range conversion module and the signal conditioning module are electrically connected to the central control unit, and the translation module is also connected to the charging module, the drive module and the current limiting circuit module, and the current limiting circuit module is connected to the range conversion module and the current sampling module, and the signal conditioning module Connected to the current sampling module and the range conversion module, the drive module is connected to the voltage doubler rectifier module through a high-frequency transformer, the output ter...

Embodiment 2

[0048]Embodiment 2: A detection method of a distribution network grounding short-circuit fault distance detection system, the method is: the distribution network grounding short-circuit fault distance detection system connects the line under test to the E terminal and the L terminal between the current sampling module and the internal resistance of the high-voltage source End, by applying a high voltage to stimulate the tested line, measure the current generated by the excitation, calculate the resistance of the tested line according to Ohm's law, and calculate the fault distance point through the resistance.

[0049] The high-voltage source connected to the tested line is: using the pulse width modulation negative feedback control mode, the pulse width modulation chip outputs a pulse width signal with a frequency of 40kHz, controls the switching power tube and drives the high-frequency transformer to work, and the output voltage of the transformer is multiplied After rectifica...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a detection method of a distribution network grounding short-circuit fault distance detection system. The method comprises the following steps that: the distribution network grounding short-circuit fault distance detection system connects a detected line to an E end and an L end between a current sampling module and a high-voltage source internal resistor, excites the detected line by applying a high voltage, and measures the current generated by excitation; and the resistance of the measured line is calculated according to the ohm theorem, and the fault distance pointis calculated through the resistance. According to the fault detection method, the fault area can be rapidly positioned and locked, the emergency rescue and work efficiency is improved, the man-machine effect is reduced, the risk is low, and the fault point positioning difficulty is reduced.

Description

technical field [0001] The invention relates to a method for detecting the distance of a grounding short-circuit fault in a distribution network, and belongs to the technical field of electric power fault detection. Background technique [0002] At present, after the fault trip of the distribution network in our country, there is no research on the fault current to judge the fault area, resulting in a lot of faults that take a long time to find out. The earliest research applied to the detection in the distribution network, only the mechanical insulation shaker is used to check the ground fault, and it is still widely used. In recent years, my country has introduced digital test insulation megger, including wide DC tester, can The application technology of converting the fault tripping current into the fault distance is to pull down the branch line switch and the main line section switch to eliminate one by one when the line is in hot standby state. The point of failure is di...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/08
CPCG01R31/086Y04S10/52
Inventor 胡崇燚刘修理周瑾国罗运国卢山邹俊段俊涛杨均智黎安俊欧阳梦雅王永强刘佳菀杨兰付克林刘辉
Owner GUIZHOU POWER GRID CO LTD
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com