CN204613388U - A kind of capacitive current transformer on-line fault diagnosis device - Google Patents
A kind of capacitive current transformer on-line fault diagnosis device Download PDFInfo
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- CN204613388U CN204613388U CN201520212561.8U CN201520212561U CN204613388U CN 204613388 U CN204613388 U CN 204613388U CN 201520212561 U CN201520212561 U CN 201520212561U CN 204613388 U CN204613388 U CN 204613388U
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- current transformer
- leakage current
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- 238000003745 diagnosis Methods 0.000 title claims abstract description 22
- 238000012545 processing Methods 0.000 claims abstract description 9
- 238000000605 extraction Methods 0.000 claims abstract description 7
- 230000003321 amplification Effects 0.000 claims description 3
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 3
- 238000009413 insulation Methods 0.000 abstract description 13
- 238000011161 development Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 239000000284 extract Substances 0.000 description 4
- 238000004587 chromatography analysis Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000011946 reduction process Methods 0.000 description 2
- 208000033999 Device damage Diseases 0.000 description 1
- 238000010835 comparative analysis Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000009666 routine test Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Abstract
The utility model discloses a kind of capacitive current transformer on-line fault diagnosis device, comprise Rogowski coil, leakage current signal prime processing module, data acquisition module, denoising module, leakage current Characteristic Extraction module and fault diagnosis module, the utility model can inline diagnosis capacitive current transformer major insulation internal wetted, shelf depreciation, capacitance plate punctures, the unstable ground connection of end shield, inner zero screen lead-in wire and zero shields and ruptures and distinguish major insulation fault and secondary coil fault, expand further and development preventing and reducing capacitive current transformer fault, its service work of accurate instruction.
Description
Technical field
The utility model relates to electrical equipment online supervision field, particularly a kind of capacitive current transformer on-line fault diagnosis device.
Background technology
Capacitive current transformer is one of equipment important in electric system, its whether normal safe operation directly affecting electric system.Capacitive current transformer fault presents ascendant trend in recent years, causes the probability of device damage to increase, the normal operation of serious threat current transformer.At present, conventional routine test (as insulation resistance, dielectric loss measurement) is sensitive for penetrability defect qualitative, but sensitive not for local defect.Infrared temperature-test technology only have when fault progression to a certain extent, heat and just can detect, be difficult to diagnosis incipience fault.Oil chromatography detection technique can detect the incipient failure of capacitive battery current transformer, but following 2 deficiencies are existed for this technology of mutual inductor: (1) off-line oil chromatography detects to be needed often to draw oil sample, in mutual inductor device body, insulating oil was not a lot of originally, often drew oil sample and will mutual inductor inner oil shortage be caused to affect its safe operation; (2) online oil chromatography checkout equipment is expensive, is not suitable for separate unit mutual inductor.High frequency office puts and ultrasonic partial discharge detection technique can detect mutual inductor internal discharge fault, but only have and just can fault be detected when mutual inductor internal discharge, be difficult to realize on-line continuous detect, and the method cannot detect the faults such as mutual inductor internal capacitance screen makes moist.Therefore, in view of the deficiency of above detection method, the utility model adopts online acquisition capacitive current transformer end shield leakage current signal, after noise reduction process, extract the sensitive features amount of reflection major insulation performance, thus can inline diagnosis capacitive current transformer major insulation internal wetted, shelf depreciation, capacitance plate punctures, the unstable ground connection of end shield, inner zero screen lead-in wire and zero shields and ruptures and distinguish major insulation fault and secondary coil fault, expand further and development preventing and reducing capacitive current transformer fault, its service work of accurate instruction, prevention power grid accident has great importance.
Utility model content
The technical problems to be solved in the utility model is: the defect existed for known technology, the utility model adopts online acquisition capacitive current transformer end shield leakage current signal, after noise reduction process, extract the sensitive features amount of reflection major insulation performance, thus can inline diagnosis capacitive current transformer major insulation internal wetted, shelf depreciation, capacitance plate punctures, the unstable ground connection of end shield, inner zero screen lead-in wire and zero shields and ruptures and distinguish major insulation fault and secondary coil fault, be conducive to preventing and reduce capacitive current transformer fault to expand further and development, accurate instruction its overhaul.
In order to realize above-mentioned technical purpose, the technical solution of the utility model is, a kind of capacitive current transformer on-line fault diagnosis device, comprise Rogowski coil, leakage current signal prime processing module, data acquisition module, denoising module, leakage current Characteristic Extraction module and fault diagnosis module, described Rogowski coil is arranged on capacitive current transformer end shield ground wire to be measured and also connects leakage current signal prime processing module in turn, data acquisition module, denoising module, leakage current Characteristic Extraction module and fault diagnosis module.
Described a kind of capacitive current transformer on-line fault diagnosis device, described leakage current signal prime processing module is signal amplification circuit.
Described a kind of capacitive current transformer on-line fault diagnosis device, described data acquisition module is data collecting card set on computing machine.
Technique effect of the present utility model is:
(1) can inline diagnosis capacitive current transformer major insulation internal wetted, shelf depreciation, capacitance plate puncture, the unstable ground connection of end shield, inner zero screen lead-in wire and zero shield and rupture and distinguish major insulation fault and secondary coil fault;
(2) can prevent from and reduce capacitive current transformer fault to expand further and development, its service work of accurate instruction, the generation of prevention power grid accident.
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Embodiment
See Fig. 1, the utility model device comprises Rogowski coil, the process of leakage current signal prime, data acquisition system (DAS), denoising, leakage current Characteristic Extraction, fault diagnosis.Rogowski coil can according to leakage current collection scope and precision customized in producer; The process of leakage current signal prime is made up of signal amplification circuit, leakage current signal is amplified to the acceptable input voltage range of NI data collecting card; Data acquisition system (DAS) is made up of PC, NI company USB-6215 data collecting card and supporting LABVIEW software; Denoising adopts small echo threshold values denoising principle to carry out denoising to leakage current signal; Leakage current Characteristic Extraction, by carrying out analyzing and processing to leakage current signal, extracts the sensitive features amount of reflection major insulation performance; Fault diagnosis, according to the amount of characteristic parameter, carries out comprehensive comparative analysis.
Principle of work of the present utility model is: first, gathers capacitive current transformer end shield place leakage current signal, leakage current signal is transformed into voltage signal by Rogowski coil 1; Then, by leakage current signal prime process 2, leakage current signal is amplified to the acceptable input voltage range of NI data collecting card; 3rd step, converts leakage current simulating signal to digital signal by data acquisition system (DAS) 3, and is sent in computing machine; 4th step, adopts small echo threshold values denoising principle to carry out denoising to leakage current signal, filtering interference signals; 5th step, carries out analyzing and processing to leakage current signal, extracts the sensitive features amount of reflection major insulation performance.After obtaining sensitive features amount, to capacitive current transformer diagnosing malfunction.
Claims (3)
1. a capacitive current transformer on-line fault diagnosis device, it is characterized in that, comprise Rogowski coil, leakage current signal prime processing module, data acquisition module, denoising module, leakage current Characteristic Extraction module and fault diagnosis module, described Rogowski coil is arranged on capacitive current transformer end shield ground wire to be measured and also connects leakage current signal prime processing module, data acquisition module, denoising module, leakage current Characteristic Extraction module and fault diagnosis module in turn.
2. a kind of capacitive current transformer on-line fault diagnosis device according to claim 1, is characterized in that, described leakage current signal prime processing module is signal amplification circuit.
3. a kind of capacitive current transformer on-line fault diagnosis device according to claim 1, is characterized in that, described data acquisition module is data collecting card set on computing machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520212561.8U CN204613388U (en) | 2015-04-09 | 2015-04-09 | A kind of capacitive current transformer on-line fault diagnosis device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520212561.8U CN204613388U (en) | 2015-04-09 | 2015-04-09 | A kind of capacitive current transformer on-line fault diagnosis device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204613388U true CN204613388U (en) | 2015-09-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520212561.8U Expired - Fee Related CN204613388U (en) | 2015-04-09 | 2015-04-09 | A kind of capacitive current transformer on-line fault diagnosis device |
Country Status (1)
| Country | Link |
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| CN (1) | CN204613388U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104777446A (en) * | 2015-04-09 | 2015-07-15 | 国家电网公司 | On-line fault diagnosis device and method for capacitive current transformer |
| CN109923424A (en) * | 2016-10-11 | 2019-06-21 | 阿莫善斯有限公司 | Device and method for diagnosing the failure of electromagnetic induction power supply unit |
-
2015
- 2015-04-09 CN CN201520212561.8U patent/CN204613388U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104777446A (en) * | 2015-04-09 | 2015-07-15 | 国家电网公司 | On-line fault diagnosis device and method for capacitive current transformer |
| CN104777446B (en) * | 2015-04-09 | 2018-06-01 | 国家电网公司 | A kind of capacitive current transformer on-line fault diagnosis device and method |
| CN109923424A (en) * | 2016-10-11 | 2019-06-21 | 阿莫善斯有限公司 | Device and method for diagnosing the failure of electromagnetic induction power supply unit |
| CN109923424B (en) * | 2016-10-11 | 2022-02-25 | 阿莫善斯有限公司 | Apparatus and method for diagnosing a fault in an electromagnetic induction power supply device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150902 Termination date: 20190409 |