CN203178417U - High voltage cable charged inspection system - Google Patents
High voltage cable charged inspection system Download PDFInfo
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- CN203178417U CN203178417U CN 201320103660 CN201320103660U CN203178417U CN 203178417 U CN203178417 U CN 203178417U CN 201320103660 CN201320103660 CN 201320103660 CN 201320103660 U CN201320103660 U CN 201320103660U CN 203178417 U CN203178417 U CN 203178417U
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- 238000007689 inspection Methods 0.000 title claims abstract description 17
- 230000010355 oscillation Effects 0.000 claims abstract description 7
- 238000006243 chemical reaction Methods 0.000 claims abstract description 5
- 238000001914 filtration Methods 0.000 claims description 6
- 230000003534 oscillatory effect Effects 0.000 claims description 6
- 238000001514 detection method Methods 0.000 abstract description 7
- 230000010360 secondary oscillation Effects 0.000 abstract 1
- 238000004458 analytical method Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 239000013307 optical fiber Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
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Abstract
The utility model relates to a detection system, in particular to a high voltage cable charged inspection system and belonging to the high voltage electrical equipment detection technical field. The high voltage cable charged inspection system comprises a high frequency current sensor characterized by connecting with a signal amplifier through a signal collection circuit; the signal amplifier is in connection with a last stage output circuit which is in connection with a central processor through a high speed A/D conversion circuit; the central processor is in connection with the signal amplifier through a first stage frequency conversion oscillation circuit; a secondary oscillation circuit is in connection with the signal amplifier. The high voltage cable charged inspection system can automatically scan and lock a frequency area with smallest interference, avoid frequency bands with stronger interference and guarantee measuring accuracy.
Description
Technical field
The utility model relates to a kind of detection system, and particularly the charged cruising inspection system of a kind of high-tension cable belongs to high voltage electric equipment detection technique field.
Background technology
The charged cruising inspection system of the high-tension cable of prior art, complex structure, and because office's discharge signal frequency of high-tension cable is higher, undesired signal is many, often poor to the fault-signal receiving sensitivity that occurs in the circuit, poor anti jamming capability, measurement accuracy is poor, cause the poor reliability of detection information, even can not in time detect the fault of appearance so that delayed processing opportunity, severe patient causes the line outage fault, influences the safe and reliable operation of electric system.
The utility model content
According to above the deficiencies in the prior art, the technical matters that the utility model mainly solves is: provide a kind of highly sensitive, antijamming capability strong, detect the information reliability height, can in time detect the charged cruising inspection system of high-tension cable of fault.
The utility model solves the problems of the technologies described above the technical scheme that adopts:
The charged cruising inspection system of described high-tension cable, comprise High Frequency Current Sensor, it is characterized in that: High Frequency Current Sensor is connected with signal amplifier by signal acquisition circuit, signal amplifier connects the final stage output circuit, the final stage output circuit is connected with central processing unit by the high-speed a/d conversion, central processing unit is connected with signal amplifier by one-level oscillation inverter circuit, and the secondary oscillatory circuit connects signal amplifier.
The charged cruising inspection system of described high-tension cable receives the electromagnetic wave signal of shelf depreciation by the electric signal orientation sensor, with electric signal after amplify handling, arrive high voltage electric equipment state-detection series of products by Optical Fiber Transmission, finish the analysis to electric signal amplitude and time difference variation, determine the discharge power at discharge position, thereby judge the insulation status of measured point, have automatic frequency sweep, frequency-selecting, anti-interference characteristics.
Described signal amplifier comprises radio-frequency amplifier, first order differential frequency circuit, the first intermediate frequency filtering amplifier, second level differential frequency circuit and the second intermediate frequency filtering amplifier that connects successively, described central processing unit is connected with the first order differential frequency circuit of signal amplifier by one-level oscillation inverter circuit, and the secondary oscillatory circuit connects the second level differential frequency circuit of signal amplifier.Handle through high frequency amplification, differential frequency circuit, output signal feeds back to central processing unit through the high-speed a/d change-over circuit, after central processing unit carries out analyzing and processing to the data of output signal, interference strength output swept-frequency signal control one-level variable frequency oscillating circuit according to output signal, adjust the frequency band of input signal, can realize autoscan and the minimum frequency field of locking interference, avoid disturbing strong frequency range, guarantee the accuracy of measurement.
The frequency of described signal acquisition circuit is 5MHz-100MHz.
The frequency of described radio-frequency amplifier is 5MHz-100MHz.
The beneficial effect that the utility model has is: the charged cruising inspection system of described high-tension cable can be implemented in the discontiguous state of tested cable under, utilize the electric signal orientation sensor to receive the shelf depreciation electromagnetic wave signal, with electric signal after amplify handling, arrive high voltage electric equipment state-detection series of products by Optical Fiber Transmission, finish the analysis to electric signal amplitude and time difference variation, determine the discharge power at discharge position, thereby judge the insulation status of measured point; And signal is through the High Frequency Current Sensor collection, handle through high frequency amplification, differential frequency circuit, output signal feeds back to central processing unit through the high-speed a/d change-over circuit, after central processing unit carries out analyzing and processing to the data of output signal, according to the interference strength output swept-frequency signal control one-level variable ratio frequency changer local-oscillator circuit of output signal, adjust the frequency band of input signal, can realize autoscan and lock disturbing minimum frequency field, avoid disturbing strong frequency range, guaranteed the accuracy of measuring.
Description of drawings
Fig. 1 is the utility model theory diagram;
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is described further:
As shown in Figure 1, the charged cruising inspection system of high-tension cable, comprise High Frequency Current Sensor, High Frequency Current Sensor is connected with signal amplifier by signal acquisition circuit, signal amplifier connects the final stage output circuit, the final stage output circuit is connected with central processing unit by the high-speed a/d conversion, and central processing unit is connected with signal amplifier by one-level oscillation inverter circuit, and the secondary oscillatory circuit connects signal amplifier.
Described signal amplifier comprises radio-frequency amplifier, first order differential frequency circuit, the first intermediate frequency filtering amplifier, second level differential frequency circuit and the second intermediate frequency filtering amplifier that connects successively, described central processing unit is connected with the first order differential frequency circuit of signal amplifier by one-level oscillation inverter circuit, and the secondary oscillatory circuit connects the second level differential frequency circuit of signal amplifier.
The frequency of described signal acquisition circuit is 5MHz-100MHz.The frequency of radio-frequency amplifier is 5MHz-100MHz.
Principle of work:
Signal is by the Acquisition Circuit collection, being amplified into differential frequency circuit through high frequency handles, output signal feeds back to central processing unit through the high-speed a/d change-over circuit, after central processing unit carries out analyzing and processing to the data of output signal, according to the interference strength output swept-frequency signal control one-level variable ratio frequency changer local-oscillator circuit of output signal, adjust the frequency band of input signal, thereby can realize autoscan and lock disturbing minimum frequency field, avoid disturbing strong frequency range, guaranteed the accuracy of measuring.
The charged cruising inspection system of described high-tension cable can be implemented in the discontiguous state of tested cable under, utilize the electric signal orientation sensor to receive the shelf depreciation electromagnetic wave signal, finish the analysis to electric signal amplitude and time difference variation, determine the discharge power at discharge position, thereby judge the insulation status of measured point, have automatic frequency sweep, frequency-selecting, anti-interference characteristics.
Claims (4)
1. charged cruising inspection system of high-tension cable, comprise High Frequency Current Sensor, it is characterized in that: High Frequency Current Sensor is connected with signal amplifier by signal acquisition circuit, signal amplifier connects the final stage output circuit, the final stage output circuit is connected with central processing unit by the high-speed a/d conversion, central processing unit is connected with signal amplifier by one-level oscillation inverter circuit, and the secondary oscillatory circuit connects signal amplifier.
2. the charged cruising inspection system of high-tension cable according to claim 1, it is characterized in that: described signal amplifier comprises radio-frequency amplifier, first order differential frequency circuit, the first intermediate frequency filtering amplifier, second level differential frequency circuit and the second intermediate frequency filtering amplifier that connects successively, described central processing unit is connected with the first order differential frequency circuit of signal amplifier by one-level oscillation inverter circuit, and the secondary oscillatory circuit connects the second level differential frequency circuit of signal amplifier.
3. the charged cruising inspection system of high-tension cable according to claim 1, it is characterized in that: the frequency of described signal acquisition circuit is 5MHz-100MHz.
4. the charged cruising inspection system of high-tension cable according to claim 2, it is characterized in that: the frequency of described radio-frequency amplifier is 5MHz-100MHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320103660 CN203178417U (en) | 2013-03-07 | 2013-03-07 | High voltage cable charged inspection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320103660 CN203178417U (en) | 2013-03-07 | 2013-03-07 | High voltage cable charged inspection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203178417U true CN203178417U (en) | 2013-09-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320103660 Expired - Fee Related CN203178417U (en) | 2013-03-07 | 2013-03-07 | High voltage cable charged inspection system |
Country Status (1)
| Country | Link |
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| CN (1) | CN203178417U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103926461A (en) * | 2014-04-03 | 2014-07-16 | 北京锐质科控电气有限公司 | Frequency selection method for partial discharge signal spatial orientation receiving frequency |
| CN104052398A (en) * | 2014-05-27 | 2014-09-17 | 江苏瑞新科技股份有限公司 | Electrical resistivity eddy current testing method of solar silicon chip |
| CN110212804A (en) * | 2019-05-18 | 2019-09-06 | 西南交通大学 | A kind of wideband dielectric that double frequency adaptively switches excitation high voltage power supply |
-
2013
- 2013-03-07 CN CN 201320103660 patent/CN203178417U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103926461A (en) * | 2014-04-03 | 2014-07-16 | 北京锐质科控电气有限公司 | Frequency selection method for partial discharge signal spatial orientation receiving frequency |
| CN104052398A (en) * | 2014-05-27 | 2014-09-17 | 江苏瑞新科技股份有限公司 | Electrical resistivity eddy current testing method of solar silicon chip |
| CN110212804A (en) * | 2019-05-18 | 2019-09-06 | 西南交通大学 | A kind of wideband dielectric that double frequency adaptively switches excitation high voltage power supply |
| CN110212804B (en) * | 2019-05-18 | 2020-07-03 | 西南交通大学 | Dual-frequency self-adaptive switching broadband dielectric excitation high-voltage power supply |
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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 |
Granted publication date: 20130904 Termination date: 20190307 |
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| CF01 | Termination of patent right due to non-payment of annual fee |