Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A neutral line disconnection detection and positioning method

A neutral line disconnection and positioning method technology, which is applied in the direction of measuring electricity, measuring devices, and measuring electrical variables, etc., can solve problems affecting power supply reliability, user equipment damage, and voltage rise of a certain phase, so as to improve power supply reliability and high-quality service, reducing the effect of user loss

Active Publication Date: 2018-05-15
STATE GRID JIANGXI ELECTRIC POWER CO LTD RES INST +1
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the operating environment of the line becomes more complicated, the neutral line disconnection occurs from time to time. If the neutral line is disconnected, the voltage of a certain phase may increase or decrease, resulting in damage to user equipment or failure to use electricity normally, affecting power supply reliability

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
  • A neutral line disconnection detection and positioning method
  • A neutral line disconnection detection and positioning method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] The invention comprehensively judges the breakage of the neutral line and the position of the breakage point by comparing the phase voltage, the phase current, the unbalance rate and the user side voltage at the outlet of the low-voltage side of the distribution transformer.

[0017] In order to make the above-mentioned detection method of the present invention more obvious and understandable, a detailed description will be given below in conjunction with the accompanying drawings and embodiments. figure 1 Shown is the flow chart of the embodiment of low-voltage neutral line disconnection, and the specific implementation steps are as follows:

[0018] 1. Detect the unbalanced rate of phase voltage and three-phase current of each phase (concentrator) A, B, and C at two points at different times at the outlet of the low-voltage side of the distribution transformer, and the sampling frequency is to collect one point every 5 minutes.

[0019] 2. Determine whether the phase ...

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 relates to a neural line breaking detection and positioning method. The method judges whether disconnection of a neural line occurs through comparison of distribution transformer low-voltage side three-phase current unbalance rate variation amplitude, a distribution transformer low-voltage side phase voltage value and a user side voltage value according to the three-phase current unbalance rate variation amplitude of different moments and in the last three days; and the disconnection position of the neural line is positioned according to a transformer area power supply network topology structure, comparison conditions of end user voltage of different sections and distribution transformer low-voltage side voltage and a GIS map, and a judgment result is pushed to operation and maintenance personnel, so that alarm information is processed in time and related emergency maintenance work is developed. The method provided by the invention is applicable to low-voltage neutral line disconnection detection and fault positioning.

Description

technical field [0001] The invention relates to a neutral line disconnection detection and positioning method, which belongs to the technical field of low-voltage line detection. Background technique [0002] The winding connection groups of 10kV distribution transformers are generally Dyn11 and Yyn0 types, usually Dyn11 type is the main type, and most of them are TT connection types, while the rural low-voltage power supply system is basically a three-phase four-wire system, and the neutral line is used as the power supply for single-phase users In the loop, the three-phase unbalanced current flows through the connection node to maintain the neutral point potential without shifting. With the complexity of the line operating environment, the neutral line disconnection occurs from time to time. If the neutral line is disconnected, the voltage of a certain phase may increase or decrease, resulting in damage to user equipment or failure to use electricity normally, affecting po...

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 Patents(China)
IPC IPC(8): G01R31/02
CPCG01R31/58
Inventor 潘建兵郑蜀江王华云安义蔡木良刘蓓李博江涂湛
Owner STATE GRID JIANGXI ELECTRIC POWER CO LTD RES INST
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com