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

Method and device for realizing non-communication high-speed distance relay in signal-free transmission line

A signal transmission, non-communication technology, applied in emergency protection circuit devices, electrical components, etc., can solve the problem of relays misidentifying fault types, unable to ensure that the circuit breaker opens single pole, etc., to achieve the effect of reducing fault clearing time

Active Publication Date: 2019-09-20
萨德克阿齐兹
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] (5) The fault resistance is within a specific range;
[0015] (2) Although the single-pole opening of the circuit breaker can be used for single-phase-to-ground faults, there is no guarantee that the circuit breaker will always open single-pole under single-phase-to-ground faults, because the relay may incorrectly identify the fault type

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 and device for realizing non-communication high-speed distance relay in signal-free transmission line
  • Method and device for realizing non-communication high-speed distance relay in signal-free transmission line
  • Method and device for realizing non-communication high-speed distance relay in signal-free transmission line

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0070] The present disclosure will be further described below in conjunction with the accompanying drawings and embodiments.

[0071] It should be noted that the following detailed description is exemplary and intended to provide further explanation of the present disclosure. Unless defined otherwise, all technical and scientific terms used in this disclosure have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.

[0072] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combi...

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 and device for realizing non-communication high-speed distance relay in a signal-free transmission line. The method is independent of the length of a protected line, and has a fault clearing time always shorter than the conventional fault clearing time. The method comprises the steps of: measuring the current and voltage waveforms of the three-phase transmitting end of a fault line; estimating the phasors of the measured current and voltage waveforms of the three-phase transmitting end of the fault line, and estimating the impedances of the voltage and current phasors of the three-phase transmitting end of the fault line; solving a fault distance and a fault resistance; setting the turn-off detection indexes of three-pole and single-pole circuit breakers, and determining the type of a turned-off circuit breaker.

Description

technical field [0001] The disclosure relates to a method and device for realizing non-communication high-speed distance relay in a non-signal transmission line based on a distance relay. Background technique [0002] The short-circuit fault near the two ends of the transmission line is usually cleared instantly by the distance relay at this end, and after hundreds of milliseconds, that is, within the working time of section II, the fault is cleared by the relay at the far end of the line. [0003] Due to various uncertainties such as inaccuracies of instrument transformers and unknown fault resistance values, the range of distance relays is not clear. Usually, the first section of the distance relay is set to act instantaneously within the first 80%-90% range of the protected line. Ⅰ The line segment that remains unprotected is called the end region. To clear faults on the ends, segment II was introduced and graded with an intentional time delay of 400 ms, and coordinated...

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): H02H7/26
CPCH02H7/262
Inventor 萨德克·阿齐兹孙明宇刘高远弗拉基米尔·特兹亚丁磊
Owner 萨德克阿齐兹
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