Unlock instant, AI-driven research and patent intelligence for your innovation.

Live check method for high voltage cable cross interconnection grounding system

A technology of cross-connection and grounding system, which is applied in the field of live checking of high-voltage cable cross-connection and grounding system, can solve the problems of uncounted stop of cables, unknown hidden dangers of lines, hidden dangers of safe operation mode of power grid, etc., and achieves the effect of improving reliability.

Active Publication Date: 2018-10-19
STATE GRID TIANJIN ELECTRIC POWER +1
View PDF5 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, under normal circumstances, after the maintenance personnel find that the circulating current is abnormal, they need to check the cables in the event of a power outage. The above method has certain disadvantages: an immediate power outage will cause an unaccounted outage of the cable line, which will affect the planned indicators and have a negative impact on the safe operation of the power grid. There are certain hidden dangers; power failure according to the plan will cause long-term unknown hidden dangers in the line, which will affect the service life of the line and the processing speed of defects

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
  • Live check method for high voltage cable cross interconnection grounding system
  • Live check method for high voltage cable cross interconnection grounding system
  • Live check method for high voltage cable cross interconnection grounding system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The circular current in a cross-connection section of a 220kV cable line is too large. In order to confirm the cause of the defect, it is necessary to check whether the cross-connection mode is correct; the structure diagram of a complete cable grounding system cross-connection section is as follows figure 1 shown;

[0029] The cross-interconnection grounding system to be tested such as figure 2 Shown, check step according to the present invention is as follows:

[0030] 1) check figure 2 Check whether the wiring methods of the two cross-connection boxes in the center are consistent. It is found that the grounding methods of the two grounding boxes are consistent, and they are all inclined to the right side of the short board; if figure 2 shown; where a, b, c represent the inner core of the coaxial cable in the grounding box, and A, B, C represent the outer core of the coaxial cable.

[0031] 2) Apply a signal of a specific frequency (transmitter adjustment freque...

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 live check method for a high voltage cable cross interconnection grounding system. The method includes the following steps: checking a wiring mode of two cross interconnection boxes of a cross interconnection section; applying a signal of a specific frequency to each connection board of a cross interconnection board in the first cross interconnection box, and receiving the signal in an adjacent grounding box; listing a theoretical value of the signal when cross transposition is correct under the wiring mode according to the wiring mode of the first cross interconnection box; matching the recorded result with the theoretical value; and comparing the test results of the first cross interconnection box and the second cross interconnection box. The live check method for a high voltage cable cross interconnection grounding system solves the problem that live check of the cross interconnection system is difficult when equipment is running.

Description

technical field [0001] The invention relates to the technical field, in particular to a live checking method for a high-voltage cable cross-interconnection grounding system. Background technique [0002] In order to limit the induced voltage and grounding current of the metal sheath of the high-voltage cable, the metal sheath needs to be cross-connected in the longer cable section, and the three-phase metal sheath is connected with a coaxial cable through the grounding box at the insulated joint for transposition connection. Incorrect transposition is one of the main causes of excessive grounding circulation, and its proportion can reach more than 70% of the causes of excessive circulation. Therefore, it is particularly important to check the cable cross-connection system after abnormal circulation. However, under normal circumstances, after the maintenance personnel find that the circulating current is abnormal, they need to check the cables in the event of a power outage. ...

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): G01R31/02
CPCG01R31/58
Inventor 李鲁博王荣亮胡泉伟林国洲陈云飞陈龙殷震
Owner STATE GRID TIANJIN ELECTRIC POWER
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