Accurate fault current sampling device for power transmission

A fault current sampling device technology, applied in the field of transmission line fault current accurate sampling device, can solve the problems of fault current signal distortion, unfavorable substation effective operation, etc., to achieve the effect of avoiding signal distortion, correcting accuracy, and widening the spectrum range

Active Publication Date: 2012-09-26
ELECTRIC POWER RES INST OF GUANGXI POWER GRID CO LTD
View PDF4 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the traditional protection based on power frequency, the high-frequency components in the signal collection process are usually filtered out as interference, resulting in distortion of the fault current signal, which is not conducive to the effective operation of the substation.

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
  • Accurate fault current sampling device for power transmission
  • Accurate fault current sampling device for power transmission
  • Accurate fault current sampling device for power transmission

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0025] Such as figure 1 As shown, the transmission line fault current accurate sampling device according to the present invention is composed of three normal channels and three fault channels, and each channel is sequenced from the current pre-processing module, the signal conditioning module, the analog-to-digital conversion module according to the signal trend module, channel switching module, data processing module, data storage module, clock control module and communication module. Polarity voltage signal, then the analog-to-digital conversion module sends the output digital signal to the channel switching module, the channel switching module responds to the signal and issues a command to switch the switching state of the signal channel, and finally the signal selected through the signal path is transmitted to the data processing module , and then ...

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 an accurate fault current sampling device for a power transmission line, which is provided with tree normal channels and three fault channels, wherein each channel is composed of a current preposed processing module, a signal conditioning module, an analog-to-digital conversion module, a channel switching module, a data processing module, a data storage model, a peripheral clock control module and a communication module which are connected sequentially according to the signal trend. The device collects current signals under different states purposefully through the switching of signal collecting channels, the spectrum range of the collected signals is widened, the high-frequency transient fault current signal distortion is prevented, and the complete collection of working frequency fault current information is realized.

Description

technical field [0001] The invention relates to the field of substation fault current monitoring, in particular to an accurate sampling device for transmission line fault current. Background technique [0002] On high-voltage long-distance transmission lines, in order to ensure the stable operation of the power system, it is required to accurately collect line fault signals. When a short circuit occurs in a power system composed of inductive elements, there will be aperiodic free components decaying with time in the short circuit transient process. Transmission lines not only have inductance, but also have capacitance between lines and between lines and ground, and these parameters are evenly distributed along the line. Therefore, when there is a high-voltage power frequency fault, there are infinitely many periodic free components that decay with time, and their frequencies are all higher than the power frequency. [0003] The high-frequency transient components of high-v...

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): G01R19/25
Inventor 邓雨荣黄志都朱时阳李明贵邬蓉蓉徐开仁
Owner ELECTRIC POWER RES INST OF GUANGXI POWER GRID CO LTD
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