Method for locating grid fault source through power quality monitoring data and electric system

A technology of power quality monitoring and fault source, applied in the direction of fault location, etc., can solve the problems of power quality problem, there is no good solution, and achieve the effect of low cost

Inactive Publication Date: 2014-07-02
TSINGHUA UNIV +1
View PDF7 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 2) Distribution network fault location technology has always been a difficult point in research at home and abroad, so far there is no good solution, and it can only rely on manual line finding
When the line fails, it will cause corresponding power quality problems

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
  • Method for locating grid fault source through power quality monitoring data and electric system
  • Method for locating grid fault source through power quality monitoring data and electric system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0046] Refer below figure 1 with figure 2 To further explain the present invention:

[0047] Single point grounding at fault point C on the line triggers the sag or sag record of the power quality monitor;

[0048] Power quality (PQ) monitoring points A and B both detect voltage sag events, and both generate corresponding voltage sag records, and transmit the voltage sag records to the central monitoring point;

[0049] When a voltage swell / drop record is added to the database of the central monitoring point, the fault judgment program will be triggered;

[0050] The fault judgment program will determine the node to which the newly added voltage sag record belongs, and then search for the corresponding record of the adjacent node. For this embodiment, the records from PQ monitoring point A and PQ monitoring point B will be determined respectively;

[0051] The central monitoring point uses the records from PQ monitoring points A and B to extract two sag starting moments t1 and t2;

[0...

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 method for locating a grid fault source through power quality monitoring data and an electric system. The problems that in the prior art, fault source locating is high in cost and large in investment are solved. The fault monitoring time difference of power quality monitoring nodes at the two ends of a fault circuit is calculated so as to locate the fault source. No more investment is needed, fault source locating can be achieved only through an existing power quality monitoring device in the power grid, and cost is low.

Description

Technical field [0001] The invention relates to a method for locating a fault source of a power system and a power system Background technique [0002] In the operation of the power system, the transmission and distribution lines are responsible for the power transmission and distribution, which are prone to failures, and it is time-consuming and difficult to find the fault points manually, which is not conducive to the rapid restoration of the grid operation. The fault location technology can quickly and accurately locate the fault according to the fault characteristics of the line failure. It is not only conducive to timely repair of the line, ensuring reliable power supply, greatly reducing the arduous labor of manual line inspection, but also contributing to the safety, stability and economic operation of the power system Very important role. Due to the different network structures of high-voltage transmission lines and medium and low-voltage distribution networks, the fault...

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
Inventor 曹军威张华赢许延祥王淼姚森敬余鹏朱正国
Owner TSINGHUA UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap