Rotor ground on-line monitoring device and method based on adaptive frequency square-wave voltage

A rotor grounding and monitoring device technology, which is applied in measuring devices, motor generator testing, measuring electricity, etc., can solve the problem that the gradual faults of system equipment cannot be displayed in time, cannot fully meet the condition maintenance of power plants, and cannot accurately determine the fault mechanism and other problems to achieve the effect of shortening the maintenance time, overcoming the excitation voltage and reducing economic losses

Inactive Publication Date: 2010-05-19
HOHAI UNIV
View PDF0 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is still limited to the detection of the failure mode. It cannot accurately judge the failure mechanism and find out the ultimate root cause of the equipment failure. It is easy to cau

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
  • Rotor ground on-line monitoring device and method based on adaptive frequency square-wave voltage
  • Rotor ground on-line monitoring device and method based on adaptive frequency square-wave voltage
  • Rotor ground on-line monitoring device and method based on adaptive frequency square-wave voltage

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0033] The technical scheme of the invention will be described in detail below in conjunction with the drawings:

[0034] Such as figure 1 As shown, the rotor grounding online monitoring device based on the adaptive frequency square wave voltage of the present invention is characterized in that it includes a rotor grounding real-time online monitoring and processing unit, an adaptive frequency adjustment square wave power supply board, a coupling resistor board, and first and second measurement Transmitter, where the input end of the coupling resistance plate is connected to the excitation voltage input end of the generator, and the output end of the coupling resistance plate is connected in series with the adaptive frequency adjustment square wave power supply board and then grounded. The control of the adaptive frequency adjustment square wave power supply board The terminal is connected in series with the first measuring transmitter and then connected to the input terminal of 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 rotor ground on-line monitoring device and method based on adaptive frequency square-wave voltage. The device comprises a rotor ground real-time on-line monitoring processing unit, an adaptive frequency regulation square-wave power panel, a coupling resistance board and first and second measuring transducers. In the method, the coupling resistance board is adopted to prevent excitation high voltage from striking back the monitoring device; the adaptive frequency square-wave power panel adaptively regulates control voltage frequency corresponding to the power panel according to a fault mode of a motor rotor; the measuring transducers acquire control voltage and measuring voltage which are output by the adaptive frequency square-wave power panel; and the rotor ground real-time on-line monitoring processing unit judges a generator fault according to the control voltage and the measuring voltage. The invention has high monitoring precision and can simply find the fault point, thereby shortening repair time and reducing economic loss brought by power failure.

Description

technical field [0001] The invention relates to a rotor grounding online monitoring device and method based on an adaptive frequency square wave voltage in the field of generator fault detection. Background technique [0002] Generators are the heart of power systems. In the engineering research of power system, because the generator rotor winding is affected by mechanical rotation, high temperature, humidity, brake dust and other environments, the insulation of the rotor to the ground is reduced and the phenomenon of grounding occurs from time to time. Since there is no corresponding on-line monitoring and fault location device, when the grounding occurs, the location of the grounding point is not known, and it takes a lot of time to find the location of the grounding point before maintenance and treatment, which prolongs the processing time of the shutdown; I want to stop the machine to deal with the grounding fault, but the grounding disappears after the machine is stopp...

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): G01R31/02G01R31/34
Inventor 查卫华袁越张仰飞
Owner HOHAI UNIV
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