CN103325614A - Method and device for detecting vacuum degree of vacuum circuit breaker - Google Patents
Method and device for detecting vacuum degree of vacuum circuit breaker Download PDFInfo
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- CN103325614A CN103325614A CN201310196753XA CN201310196753A CN103325614A CN 103325614 A CN103325614 A CN 103325614A CN 201310196753X A CN201310196753X A CN 201310196753XA CN 201310196753 A CN201310196753 A CN 201310196753A CN 103325614 A CN103325614 A CN 103325614A
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- vacuum circuit
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Abstract
A method for detecting the vacuum degree of a vacuum circuit breaker comprises the following steps of detecting if high-frequency electromagnetic wave signals with the frequency range of 20-100MHz exist around a vacuum envelope of the vacuum circuit breaker, and if yes, the vacuum degree of the vacuum circuit breaker is judged to be abnormal. Due to the fact that when the vacuum degree of the vacuum circuit breaker is lowered, the high-frequency electromagnetic wave signals within the frequency range of 20-100MHz can be emitted, the abnormal phenomenon of the vacuum degree of the vacuum circuit breaker is judged according to detection of the existence of the high-frequency electromagnetic wave signals. Through the method, when the vacuum degree of the vacuum circuit breaker is detected, a probe does not need to be installed in the vacuum envelope of the vacuum circuit breaker, the inside structure of the vacuum circuit breaker does not need to be changed, and installation is convenient.
Description
Technical field
The present invention relates to vacuum circuit-breaker health degree detection technique field, be specifically related to a kind of novel method for detection of Vacuity of Vacuum Circuit Breakers and a kind of device that adopts the method to carry out the Vacuity of Vacuum Circuit Breakers detection.
Background technology
Vacuum circuit-breaker is the circuit breaker of a kind of contact in the vacuum bubbles of high vacuum deciliter, and at the control and protection that plays a part in service of system for distribution network of power, its operation, maintenance and maintenance situation and whole system are closely related.Along with the raising of electric pressure and the increase of installed capacity, system is more and more higher to the requirement of power equipment operational reliability, and this detects with diagnostic techniques to power equipment and has higher requirement.
In recent years, vacuum circuit-breaker defective occurs and the number of times that has an accident increases to some extent.Along with vacuum circuit-breaker in the particularly utilization on a large scale in the medium voltage network of electric power system, vacuum circuit-breaker is implemented the online necessity that detects seems more for outstanding.
Carry out Vacuity of Vacuum Circuit Breakers in the prior art when detecting, need to install probe additional in the vacuum bubbles of vacuum circuit-breaker, this kind mode has not only changed the internal structure of vacuum circuit-breaker, and for detection of device install also and have difficulties.
Summary of the invention
Technical problem to be solved by this invention is exactly, a kind of novel method for detection of Vacuity of Vacuum Circuit Breakers is provided, when the vacuum degree of utilizing the method to carry out vacuum circuit-breaker detects, need not in the vacuum bubbles of vacuum circuit-breaker, to install probe additional, need not to change the internal structure of vacuum circuit-breaker.
It is as follows that the present invention solves the technical scheme that its technical problem takes: a kind of method for detection of Vacuity of Vacuum Circuit Breakers, it is characterized in that, comprise the steps: to detect whether to have frequency range near the vacuum tube of vacuum breaker be the high frequency electromagnetic wave signal of 20-100MHz, if there have the vacuum degree of then judging this vacuum circuit-breaker to exist to be unusual.
The principle that the present invention detects the vacuum degree of vacuum circuit-breaker is: when the vacuum degree of vacuum circuit breaker reduces, disruptive discharge occurs between band electrical contact in the arc control device of vacuum circuit-breaker and the screen cover, be attended by high frequency electromagnetic wave signal, frequency range is 20-100MHz, by surveying this signal, whether the vacuum degree that can monitor vacuum circuit-breaker is normal.
The invention also discloses a kind of said method that utilizes and carry out the device that Vacuity of Vacuum Circuit Breakers detects, this device is one to be used for receiving the high-frequency signal receiver of the high frequency electromagnetic wave signal that vacuum circuit-breaker sends.
Described high-frequency signal receiver is by the antenna that links to each other successively, the LC resonant circuit, signal coupling circuit, low noise amplifier circuit, band pass filter, signal output part forms, the described high frequency electromagnetic wave signal of antenna reception, output to and carry out frequency-selecting in the LC resonant circuit, the LC resonant circuit is selected frequency range in the high frequency electromagnetic wave signal of 20-100MHz, output to low noise amplifier circuit through the signal coupling circuit coupling again, low noise amplifier circuit amplifies the high frequency electromagnetic wave signal in the 20-100MHz frequency range, outputs in the band pass filter and exports behind the filtering interference signals.
Described antenna is retractable monopole antenna.
Relative prior art, the present invention has following beneficial effect:
The present invention can launch the high frequency electromagnetic wave signal that frequency range is 20-100MHz when reducing according to the vacuum degree of vacuum circuit-breaker, by detect this high-frequency signal have or not judge whether the vacuum degree of vacuum circuit-breaker exists unusually, when the vacuum degree of utilizing method of the present invention to carry out vacuum circuit-breaker detects, need not in the vacuum bubbles of vacuum circuit-breaker, to install probe additional, need not change the internal structure of vacuum circuit-breaker fully, and install also convenient.
Description of drawings
Fig. 1 is the structured flowchart of the high-frequency signal receiver of the specific embodiment of the invention.
Embodiment
When the vacuum degree of vacuum circuit breaker reduces, disruptive discharge occurs between band electrical contact in the arc control device of vacuum circuit-breaker and the screen cover, be attended by high frequency electromagnetic wave signal, frequency range is 20-100MHz, the present invention just is being based on above-mentioned research, near detecting vacuum tube of vacuum breaker, whether there is above-mentioned high frequency electromagnetic wave signal, judges whether the vacuum degree of vacuum circuit-breaker is normal.
The invention also discloses a kind of the inventive method of utilizing and carry out the device that Vacuity of Vacuum Circuit Breakers detects, this device is a high-frequency signal receiver that is used for receiving above-mentioned high frequency electromagnetic wave signal, as shown in Figure 1, this device is by the antenna that links to each other successively, the LC resonant circuit, signal coupling circuit, low noise amplifier circuit, band pass filter, signal output part forms, the described high frequency electromagnetic wave signal of antenna reception, output to and carry out frequency-selecting in the LC resonant circuit, the LC resonant circuit is selected frequency range in the high frequency electromagnetic wave signal of 20-100MHz, output to low noise amplifier circuit through the signal coupling circuit coupling again, low noise amplifier circuit amplifies the high frequency electromagnetic wave signal in the 20-100MHz frequency range, outputs in the band pass filter and exports behind the filtering interference signals.
This high-frequency signal receiver is selected half-wave doublet antenna, LC frequency-selecting, again coupling output, with electromagnetic field signal process filter and amplification, amplifying element amplifies the signal in the 20-100MHz frequency range, filtering interference signals again, and the signal that obtains needing passes to follow-up link and uses.Because the frequency of the indoor discharge of vacuum extinction can be chosen flexible monopole antenna between 20-100MHz.The length of monopole antenna is 1/4 of received signal frequency wavelength, and impedance is 50 ohm.For example the electromagnetic wavelength of corresponding 100MHz is 3m, and required monopole antenna length gets final product for 0.75m.
Claims (4)
1. method for detection of Vacuity of Vacuum Circuit Breakers, it is characterized in that, comprise the steps: to detect whether to have frequency range near the vacuum tube of vacuum breaker be the high frequency electromagnetic wave signal of 20-100MHz, if there have the vacuum degree of then judging this vacuum circuit-breaker to exist to be unusual.
2. one kind is utilized the described method of claim 1 to carry out the device that Vacuity of Vacuum Circuit Breakers detects, and it is characterized in that, this device is one to be used for receiving the high-frequency signal receiver of the high frequency electromagnetic wave signal that vacuum circuit-breaker sends.
3. the device that detects for Vacuity of Vacuum Circuit Breakers according to claim 2, it is characterized in that, described high-frequency signal receiver is by the antenna that links to each other successively, the LC resonant circuit, signal coupling circuit, low noise amplifier circuit, band pass filter, signal output part forms, the described high frequency electromagnetic wave signal of antenna reception, output to and carry out frequency-selecting in the LC resonant circuit, the LC resonant circuit is selected frequency range in the high frequency electromagnetic wave signal of 20-100MHz, output to low noise amplifier circuit through the signal coupling circuit coupling again, low noise amplifier circuit amplifies the high frequency electromagnetic wave signal in the 20-100MHz frequency range, outputs in the band pass filter and exports behind the filtering interference signals.
4. the device for the Vacuity of Vacuum Circuit Breakers detection according to claim 3 is characterized in that, described antenna is retractable monopole antenna.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310196753XA CN103325614A (en) | 2013-05-23 | 2013-05-23 | Method and device for detecting vacuum degree of vacuum circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310196753XA CN103325614A (en) | 2013-05-23 | 2013-05-23 | Method and device for detecting vacuum degree of vacuum circuit breaker |
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| Publication Number | Publication Date |
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| CN103325614A true CN103325614A (en) | 2013-09-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310196753XA Pending CN103325614A (en) | 2013-05-23 | 2013-05-23 | Method and device for detecting vacuum degree of vacuum circuit breaker |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106840509A (en) * | 2016-12-29 | 2017-06-13 | 河南平高电气股份有限公司 | Vacuity of Vacuum Circuit Breakers on-line monitoring system based on superfrequency Cleaning Principle |
| CN112017907A (en) * | 2020-08-13 | 2020-12-01 | 黄山学院 | Vacuum degree degradation non-contact detection method of vacuum circuit breaker and early warning device thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012216325A (en) * | 2011-03-31 | 2012-11-08 | Chugoku Electric Power Co Inc:The | Tank type vacuum circuit breaker |
-
2013
- 2013-05-23 CN CN201310196753XA patent/CN103325614A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012216325A (en) * | 2011-03-31 | 2012-11-08 | Chugoku Electric Power Co Inc:The | Tank type vacuum circuit breaker |
Non-Patent Citations (1)
| Title |
|---|
| 李彦平: "真空断路器真空灭弧室内真空度的在线检测", 《中国优秀硕士学位论文全文数据库》, no. 5, 15 November 2007 (2007-11-15) * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106840509A (en) * | 2016-12-29 | 2017-06-13 | 河南平高电气股份有限公司 | Vacuity of Vacuum Circuit Breakers on-line monitoring system based on superfrequency Cleaning Principle |
| CN112017907A (en) * | 2020-08-13 | 2020-12-01 | 黄山学院 | Vacuum degree degradation non-contact detection method of vacuum circuit breaker and early warning device thereof |
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Application publication date: 20130925 |