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

Three-phase synchronous partial discharge detection method

A partial discharge detection and partial discharge technology, applied in the direction of testing dielectric strength, etc., can solve problems such as difficulty in determining

Pending Publication Date: 2020-12-11
HANGZHOU XIHU ELECTRONICS INST
View PDF6 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, for the judgment of single-phase and multi-phase waveforms, it is difficult to determine whether the partial discharge waveforms on the waveforms belong to source partial discharge, secondary partial discharge, or other interference discharge signals

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
  • Three-phase synchronous partial discharge detection method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0021] Such as figure 1 As shown, according to the characteristic that the phase difference between the three-phase voltages of the three-phase AC is 120°, the phase difference between the A phase and the B phase in the three-phase electrical equipment is 120°, and the phase between the B phase and the C phase The difference is 120°, and the phase difference between phase A and phase C is 240°.

[0022] Three-phase synchronous partial discharge detection method: Install sensors at the same position of each phase of three-phase electrical equipment, and the sensors are connected to multi-channel partial discharge detectors, which use the same time scale to express the three-phase signals synchronously ; Observe the changing state of the waveform of the signal at the same time in the three-phase waveform diagram. If there is a discharge signal, determine the t...

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 three-phase synchronous partial discharge detection method. The existing method is difficult to determine the source and the attribute of the detected discharge. According tothe method, each phase of three-phase electrical equipment is provided with a sensor, the sensors are connected to a multi-channel partial discharge detector, and the partial discharge detector adopts the same time scale to synchronously express three-phase signals; the type of a partial discharge signal is determined according to the amplitude of the discharge signal, and if the amplitudes of the discharge signals of the three-phase high-voltage oscillogram are the same at the same moment, the discharge signal is determined as an interference discharge signal; and if the amplitude of the discharge signal of one phase is greater than that of the discharge signals of the other two phases, the discharge signal with the large amplitude is a source partial discharge signal. The attribute of the partial discharge is judged according to the phase characteristics of the source partial discharge signal. According to the method, the propagation state of the partial discharge signal can be completely observed, the interference signal is cut off in the time domain according to the time scale, and the position and attribute of partial discharge can be accurately and conveniently judged.

Description

technical field [0001] The invention belongs to the technical field of electric high-voltage detection, and in particular relates to a three-phase synchronous partial discharge detection method. Background technique [0002] For a certain insulation structure of electrical equipment, there may be some insulation weaknesses. It will first discharge under a certain applied voltage, but it will not immediately form a penetrating breakdown of the entire insulation tube. Electrical discharges where this insulation between conductors is only partially bridged are called partial discharges. This discharge may or may not occur near the conductor (GB / T7354-2003 "Partial Discharge Detection"). [0003] In the power system, insulators are an important part of ensuring the safety of electrical equipment. Once the insulators are damaged, leakage will occur. Different working parts have different effects, but no matter what the situation is, it will cause certain damage to the power sys...

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): G01R31/12
CPCG01R31/12
Inventor 楼狄洪亮亮王俊肖
Owner HANGZHOU XIHU ELECTRONICS INST
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