Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Online monitoring device for turn-to-turn insulation fault of air-core power reactor

A technology of inter-turn insulation and monitoring devices, applied in measuring devices, electrical winding testing, instruments, etc., can solve the problems of burning reactors, reactor fires, damages, etc., and achieve the effect of monitoring and strong practicability

Inactive Publication Date: 2017-03-29
HARBIN UNIV OF SCI & TECH +1
View PDF2 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the operation of air-core power reactors, due to insulation aging, damp coils, frequent switching, and partial arcing, the reactor turns to short-circuit faults, causing the reactor to catch fire, burning the reactor, and causing irreversible damage. Therefore, it is necessary to study a main On-line monitoring technology for short-circuit faults A device that detects faults at the early stage of short-circuits

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
  • Online monitoring device for turn-to-turn insulation fault of air-core power reactor
  • Online monitoring device for turn-to-turn insulation fault of air-core power reactor
  • Online monitoring device for turn-to-turn insulation fault of air-core power reactor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] The present invention will be further described below in conjunction with accompanying drawing and specific embodiment, with reference to Figure 1~5 , is the embodiment provided by the utility model.

[0026] The present invention is composed of a signal extraction part, a signal conversion control part, a computer operation part, a display and an alarm part figure 1 ; The loss factor data used for monitoring is the loss factor result obtained from the simulation experiment.

[0027] Described emulation step is: 1) set up the analog circuit under the normal working condition such as image 3 , Calculate the loss factor through the current and voltage of each branch; 2) Establish a fault simulation circuit under the working state of inter-turn short circuit, calculate the active power and reactive power through the current and voltage, and obtain the loss factor through the ratio; 3) Establish the fault simulation circuit Fault simulation circuit under short-circuit w...

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 an online monitoring device for a turn-to-turn insulation fault of an air-core power reactor, which is characterized by comprising a method for judging a turn-to-turn insulation fault of the air-core power reactor through changes in value of a loss factor. The online monitoring device is composed of a signal extraction portion, a signal conversion control portion, a computer operation portion and a display and alarm portion, and is characterized in that terminal voltage and current signals of a monitored reactor are extracted by applying a voltage transformer and a current transformer, the terminal voltage and current signals are zoomed so as to conform to a processing range of an AD converter, a single-chip microcomputer controls the AD converter to perform processing on analog voltage and current signals, the processed analog voltage and current signals are sent to a computer to perform analysis and calculation on a loss factor, active power and reactive power are calculated through current and voltage signals, and the loss factor is calculated; changes of the loss factor tan<delta> is monitored online in real time, the loss factor tan<delta> is compared with a loss factor tan<delta> threshold under normal power reactor running, a running state of the reactor is displayed, and an alarm is given out when the loss factor tan<delta> exceeds the threshold. The online monitoring device realizes online monitoring for the air-core power reactor; a detection objective is realized via the proposed method of being according to changes of the loss factor, thereby promoting and expanding a new direction of online monitoring for the air-core power reactor; and the running reliability of the air-core power reactor is improved.

Description

technical field [0001] The invention relates to the technical field of on-line monitoring of air-core power reactors, and more specifically, relates to a research on on-line monitoring of inter-turn insulation of air-core power reactors. Background technique [0002] With the development of my country's economy and the improvement of science and technology, the power system is increasingly developing in the direction of long-distance, large capacity, and high voltage. As an important part of the power system, reactors have reactive power compensation, phase shifting, current limiting, Steady flow and filtering. The air-core power reactor was first successfully developed by the Canadian TE company in the 1970s. This dry-type reactor has a relatively simple structure and good performance. After it was put into operation, it gradually replaced the old-fashioned air-core reactor. Because of the advantages of simple structure and light weight, it has been widely used in 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): G01R31/06G01R31/12
CPCG01R31/12G01R31/72
Inventor 魏新劳王瀚
Owner HARBIN UNIV OF SCI & TECH
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
Eureka Blog
Learn More
PatSnap group products