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

Fault Identification and Orientation Detection in Three-Phase Power Systems

A three-phase power and power system technology, applied in the fault location, detecting faults according to conductor types, measuring electricity and other directions, can solve the problem of not guaranteeing the distinction between two-phase grounding faults and single-phase grounding faults, and fault detection equipment is not suitable for widespread implementation. And other issues

Active Publication Date: 2011-11-30
SCHNEIDER ELECTRIC IND SAS
View PDF8 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Therefore, it is evident that existing fault detection devices are not suitable for widespread implementation, given their complexity, especially the number of sensors required when two-phase sites are assembled
Moreover, for less complex detection equipment comprising only the current sensor 12, in some applications, especially depending on the neutral system, the distinction between two-phase-to-earth faults and single-phase-to-earth faults cannot be guaranteed

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
  • Fault Identification and Orientation Detection in Three-Phase Power Systems
  • Fault Identification and Orientation Detection in Three-Phase Power Systems
  • Fault Identification and Orientation Detection in Three-Phase Power Systems

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0031] The directional detection device 15 for a fault 10 according to the invention can replace the existing device 6 and be used in applications such as those described in figure 1 Any three-phase power system 1 of that kind. In particular, although the description refers to a power system 1 with a natural frequency F=50 Hz, the arrangement and method according to the invention are directly adaptable to other frequencies. The description hereinafter will be directed to a balanced power system 1, that is, in the absence of faults, the zero-sequence current I 0 is made in zero cases, but this is by no means restrictive.

[0032] Such as figure 2 As shown, the device 20 provides a three-phase conductor 4 representing the incoming line 4 A 、4 B 、4 C One or more signals of the current in each root. The current measuring device 20 advantageously forms part of the device 15 fitted on said line 4 according to the invention and is connected to the measuring device directly on ...

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

According to the present invention, a fault directional detection method and device in a polyphase power system is based on harmonic analysis of currents corresponding to the sum of half-waves of the same polarity of each phase current of the power system, and each phase current (4A, 4B , 4C) comparison of changes in amplitude or any other norm value. In particular, the 2nd and 1st harmonics of the previous current are compared with the 0th harmonic respectively, and depending on the ratio, the fault can be classified as two-phase or single-phase. Comparison of the mean value (μ) of the norm of each phase (||IA||, ||IB||, ||IC||) with each said norm can further be performed with respect to the phase current sensor (12) Locate the fault.

Description

technical field [0001] The present invention relates to the identification and directed detection of faults between two phases of a three-phase power system without measuring line voltage. In particular, the present invention relates to a method of detecting a two-phase fault in a power system and further being able to determine whether the fault is on the line side or the load side of the detection point. The method according to the invention is based on a unique signal representing the current of each phase of the power system, the processing of which leads to parameters enabling orientation. The two-phase detection method for two-phase faults can be coupled with other steps to identify and locate single-phase or three-phase faults. [0002] According to another feature, the invention concerns a detection device designed to carry out the method described above. In particular, the directional fault detection device comprises means for calculating parameters from the current...

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): G01R31/02G01R31/08
CPCG01R31/085G01R31/088H02H3/347
Inventor 帕斯卡尔.库姆内尔纪尧姆.沃尼奥
Owner SCHNEIDER ELECTRIC IND SAS
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