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

A distribution network fault location method

A technology of fault location and distribution network, applied in fault location, fault detection by conductor type, etc., can solve problems such as loss, wrong positioning result, signal delay, etc., and achieve the effect of reducing fault positioning time, high efficiency and practicability

Active Publication Date: 2020-01-10
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, its disadvantage is that signal delay or loss of communication will lead to wrong positioning results

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 distribution network fault location method
  • A distribution network fault location method
  • A distribution network fault location method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0035] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0036] The distribution network fault distance measurement method provided by the embodiment of the present invention is based on the high-frequency information generated after the faulty system recloses to perform distribution network fault distance measurement. Specifically, after the fault occurs, the circuit breaker at the beginning of the fault area is quickly reclosed, and the high-frequency impedance value is calculated by using the transient...

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 distribution network fault range-finding method, and the method comprises the steps: carrying out reclosing operation of a circuit start end circuit breaker after a fault happens, and measuring a voltage value and a current value at a high frequency after a permanent fault state; calculating the high-frequency impedance value of a circuit between a corresponding fault point under the high frequency and a measurement point according to the voltage value and the current value; and calculating and determining a fault distance according to the high-frequency impedance value of the circuit between the corresponding fault point and the measurement point and the high-frequency impedance value per unit length of the circuit under the high frequency. According to the embodiment of the invention, the method shortens the fault positioning time while guaranteeing the positioning precision of the fault, is very high in efficiency and practicality, and does not need to introduce additional equipment and signal channels.

Description

technical field [0001] The invention relates to the technical field of power system protection and control, in particular to a method for distance measurement of distribution network faults. Background technique [0002] In the power system, fast and accurate fault location is crucial to quickly restore power supply and improve the reliability of the power system. Fast and accurate fault location can reduce the influence of the fault on the entire power system, thereby improving the stability of the power system . [0003] At present, fault location methods in power systems mainly include impedance method, traveling wave method and wide area method. in: [0004] The impedance method is to use the electrical quantity information obtained from the measurement point after the fault to calculate the line impedance to the fault point to realize fault location. This method is easily affected by changes in power supply parameters and load parameters. In the case of false fault p...

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): G01R31/08
CPCG01R31/086
Inventor 贾科李论宣振文李晨曦李猛王聪博
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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