Method for detecting electric network fault transient travelling wave signal

A technology for transient traveling waves and power grid faults, applied in the direction of fault location, information technology support system, etc., can solve the problems of complex installation, high equipment cost, inconvenient popularization and application, etc., and achieve wide adaptability, sensitive response, and convenient installation Effect

Inactive Publication Date: 2009-01-28
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
View PDF2 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention patent with the application number 200510102444.7 titled "Traveling wave fault location device for transmission line with time-division multiplexing sampling" discloses an analog sampling method for each data acquisition channel by using high sampling rate A/D under the condition of time-division multiplexing. method, this method has high positioning accuracy and good reliability; however, the device has a complex hardware and software structure, and needs to be equipped with a high-speed acquisition card and special data analysis software for traveling wave morphology, and the cost of the ...

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 for detecting electric network fault transient travelling wave signal
  • Method for detecting electric network fault transient travelling wave signal
  • Method for detecting electric network fault transient travelling wave signal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] The structure of the present invention is as figure 1 As shown, it consists of an open-type special traveling wave sensor 1, a high frequency shielded cable 2, a traveling wave head detection unit 3, and a traveling wave time recording unit 4, etc. The open-type special traveling wave sensor 1 socketed on the casing grounding wire 5 of the transformer 6 converts the traveling wave head into a high-frequency transient wave with an amplitude between 2V ~ 12V and a frequency between 100kHz ~ 2MHz accurately and without delay. State traveling wave signal, and sent from the secondary side to the input end of the traveling wave head detection unit 3 through the high frequency shielded cable 2; Time and wave head amplitude are used to identify the traveling wave head. When the change rate level of the traveling wave signal is greater than 0.3V, the rise or fall time is less than 10μS, and the amplitude of the traveling wave head is greater than 2V, the traveling wave head dete...

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 power network transient-cause forced outage travelling wave signal detection method, belonging to the field of power system. The method is that an opening-typed special travelling wave sensor is arranged on a shell grounding wire of the transformer of a transformer substation and used for detecting the power network transient signal; the power network transient-cause forced outage travelling signal is judged according to the arising time and amplitude of the transient signal and the exact time and polarity used for the arrival of the travelling wave signal are recorded. The opening-typed special travelling wave sensor of the invention can detect the forced outage travelling wave signals of all wires at high voltage side, low voltage side and middle voltage side of the transformer of the transformer substation, thus having simple realization and facilitating generalization.

Description

technical field [0001] The invention belongs to the technical field of fault diagnosis of a high-voltage transmission network, and in particular relates to a detection method for a fault transient traveling wave signal of a power grid. Background technique [0002] Transient traveling wave signal detection of power grid fault is the key to fault traveling wave location and protection of transmission line. Most of the existing transient traveling wave signal detection methods extract the traveling wave signal from the secondary side of the current transformer, judge the fault traveling wave signal through high-speed acquisition and software detection, record the arrival time of the fault traveling wave, and measure the transient state of each outgoing line Electric current, detection device is complicated, and cost is high. For this reason, the related technologies of extracting the transient voltage traveling wave of power grid for fault location by traveling wave sensor ha...

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
IPC IPC(8): G01R31/08
CPCY04S10/522Y04S10/52
Inventor 曾祥君李泽文秦小安王媛媛何纯芳
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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