CN201788255U - Partial discharge ultra-high frequency online detecting system - Google Patents
Partial discharge ultra-high frequency online detecting system Download PDFInfo
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- CN201788255U CN201788255U CN2010202966771U CN201020296677U CN201788255U CN 201788255 U CN201788255 U CN 201788255U CN 2010202966771 U CN2010202966771 U CN 2010202966771U CN 201020296677 U CN201020296677 U CN 201020296677U CN 201788255 U CN201788255 U CN 201788255U
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Abstract
The utility model discloses a partial discharge ultra-high frequency online detecting system. An ultra-high frequency sensor of the system is mounted beside a transformer to be detected and connected with a signal processing unit by the aid of a high-frequency transmission cable; the signal processing unit is connected with a data acquisition unit by the aid of another high-frequency transmission cable; the data acquisition unit is connected with a computer control unit; the computer control unit is connected with the signal processing unit by the aid of a data wire; the signal processing unit consists of a band-pass filter, a preamplifier, a frequency mixer, a low-pass filter, a medium-frequency amplifier and a detection logarithmic amplifier which are sequentially connected in series; and a parallel port of the computer control unit is connected with the low-pass filter and connected with the frequency mixer by the aid of a frequency synthesizer. The partial discharge ultra-high frequency online detecting system realizes partial discharge detection and positioning by detecting ultra-high frequency electromagnetic signals generated by partial discharge inside the transformer, avoids interference of substation sites and accordingly improves detection sensitiveness greatly.
Description
One. technical field: the utility model relates to the power technology field, particularly relates to a kind of local discharge superhigh frequency on-line detecting system.
Two. background technology: shelf depreciation is the major reason of transformer insulated deterioration, also is to characterize transformer insulated aging important parameter.Traditional partial discharge test method, the frequency that can detect signal generally is no more than 1MHz, and the transformer station scene exists a large amount of interference and noise, mainly be distributed in below the 300MHz, this is the reason that traditional partial discharge test method can not perform well in the partial discharge of transformer on-line monitoring.
Three. the content of utility model:
Technical problem to be solved in the utility model is: overcome the deficiencies in the prior art, provide a kind of highly sensitive, coupled characteristic is good, high temperature resistant and local discharge superhigh frequency on-line detecting system that antijamming capability is strong.
The technical solution of the utility model is: a kind of local discharge superhigh frequency on-line detecting system, contain uhf sensor, the high-frequency transmission cable, signal processing unit, data acquisition unit and computer control unit, described uhf sensor is installed in transformer to be measured next door, it is connected with described signal processing unit by the high-frequency transmission cable, described signal processing unit is connected with described data acquisition unit by the high-frequency transmission cable, described data acquisition unit is connected with described computer control unit, and described computer control unit is connected with described signal processing unit by data line.
Described signal processing unit is connected in series successively by bandpass filter, prime amplifier, frequency mixer, low-pass filter, intermediate frequency amplifier and detection logarithmic amplifier and forms, the parallel port of described computer control unit is connected with described low-pass filter, and is connected with described frequency mixer by frequency synthesizer.
Described high-frequency transmission cable is high frequency double shield 50 Ω concentric cable.
The beneficial effects of the utility model are:
1, the utility model has been avoided the interference at transformer station scene, thereby has been improved the sensitivity that detects greatly by detection and location that the ultrahigh frequency electromagnetic signal that detects the inner shelf depreciation of transformer and produced realizes shelf depreciation.
2, the utility model can detect when transformer normally moves, and does not change the normal configuration of transformer, does not influence the normal operation of transformer, and can regularly carry out input and record automatically, and the time interval can artificially be set, and is very convenient.
3, the utility model makes full use of the shielding action of transformer self housing, has solved the subject matter in the partial discharge of transformer on-line monitoring, is easy to promote, and has good economic benefit.
Four. description of drawings:
Fig. 1 is a structured flowchart of the present utility model;
Fig. 2 is the structure principle chart of signal processing unit among Fig. 1.
Five. embodiment:
Embodiment: referring to Fig. 1 and Fig. 2, among the figure, 1-bandpass filter, 2-prime amplifier, 3-frequency mixer, 4-frequency synthesizer, 5-low-pass filter, 6-intermediate frequency amplifier, 7-detection logarithmic amplifier.
The local discharge superhigh frequency on-line detecting system contains uhf sensor, high-frequency transmission cable, signal processing unit, data acquisition unit and computer control unit, wherein, uhf sensor is installed in transformer to be measured next door, it is connected with signal processing unit by the high-frequency transmission cable, signal processing unit is connected with data acquisition unit by the high-frequency transmission cable, data acquisition unit is connected with computer control unit, and computer control unit is connected with signal processing unit by data line.The high-frequency transmission cable is high frequency double shield 50 Ω concentric cable.
Signal processing unit is connected in series successively by bandpass filter 1, prime amplifier 2, frequency mixer 3, low-pass filter 5, intermediate frequency amplifier 6 and detection logarithmic amplifier 7 and forms, the parallel port of computer control unit is connected with low-pass filter 5, and is connected with frequency mixer 3 by frequency synthesizer 4.
The interference at transformer station scene has been avoided in detection and location that the ultrahigh frequency electromagnetic signal that the utility model is produced by the inner shelf depreciation of detection transformer realizes shelf depreciation, improves the sensitivity that detects greatly.
Claims (3)
1. local discharge superhigh frequency on-line detecting system, contain uhf sensor, the high-frequency transmission cable, signal processing unit, data acquisition unit and computer control unit, it is characterized in that: described uhf sensor is installed in transformer to be measured next door, it is connected with described signal processing unit by the high-frequency transmission cable, described signal processing unit is connected with described data acquisition unit by the high-frequency transmission cable, described data acquisition unit is connected with described computer control unit, and described computer control unit is connected with described signal processing unit by data line.
2. local discharge superhigh frequency on-line detecting system according to claim 1, it is characterized in that: described signal processing unit is connected in series successively by bandpass filter, prime amplifier, frequency mixer, low-pass filter, intermediate frequency amplifier and detection logarithmic amplifier and forms, the parallel port of described computer control unit is connected with described low-pass filter, and is connected with described frequency mixer by frequency synthesizer.
3. local discharge superhigh frequency on-line detecting system according to claim 1 and 2 is characterized in that: described high-frequency transmission cable is high frequency double shield 50 Ω concentric cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202966771U CN201788255U (en) | 2010-08-19 | 2010-08-19 | Partial discharge ultra-high frequency online detecting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202966771U CN201788255U (en) | 2010-08-19 | 2010-08-19 | Partial discharge ultra-high frequency online detecting system |
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| Publication Number | Publication Date |
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| CN201788255U true CN201788255U (en) | 2011-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010202966771U Expired - Fee Related CN201788255U (en) | 2010-08-19 | 2010-08-19 | Partial discharge ultra-high frequency online detecting system |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102628916A (en) * | 2012-04-12 | 2012-08-08 | 江苏省电力试验研究院有限公司 | System for positioning local discharge of transformer on line based on ultrahigh-frequency signal |
| CN102735999A (en) * | 2012-07-02 | 2012-10-17 | 山东电力集团公司电力科学研究院 | Gas insulated substation (GIS) partial discharge online monitoring system and fault mode identifying method thereof |
| CN102841296A (en) * | 2012-09-10 | 2012-12-26 | 江苏科技大学 | Online monitoring system and method for partial discharge of intelligent switch cabinet based on ultra-high frequency detection |
| CN102879718A (en) * | 2012-10-09 | 2013-01-16 | 上海交通大学 | Wired-loop-based entire-station monitoring and positioning system and positioning method for partial discharge |
| CN103529368A (en) * | 2013-10-21 | 2014-01-22 | 国家电网公司 | Online monitoring system for ultrahigh-frequency partial discharge of high-voltage parallel reactors of substation |
| CN105137312A (en) * | 2015-10-22 | 2015-12-09 | 国网河南禹州市供电公司 | Transformer partial discharge ultrahigh frequency detection device |
| CN105188326A (en) * | 2014-05-30 | 2015-12-23 | 国家电网公司 | Filtering system for inhibiting high-frequency strong interference signal of transformer station |
-
2010
- 2010-08-19 CN CN2010202966771U patent/CN201788255U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102628916A (en) * | 2012-04-12 | 2012-08-08 | 江苏省电力试验研究院有限公司 | System for positioning local discharge of transformer on line based on ultrahigh-frequency signal |
| CN102735999A (en) * | 2012-07-02 | 2012-10-17 | 山东电力集团公司电力科学研究院 | Gas insulated substation (GIS) partial discharge online monitoring system and fault mode identifying method thereof |
| CN102735999B (en) * | 2012-07-02 | 2014-12-10 | 山东电力集团公司电力科学研究院 | Gas insulated substation (GIS) partial discharge online monitoring system and fault mode identifying method thereof |
| CN102841296A (en) * | 2012-09-10 | 2012-12-26 | 江苏科技大学 | Online monitoring system and method for partial discharge of intelligent switch cabinet based on ultra-high frequency detection |
| CN102879718A (en) * | 2012-10-09 | 2013-01-16 | 上海交通大学 | Wired-loop-based entire-station monitoring and positioning system and positioning method for partial discharge |
| CN103529368A (en) * | 2013-10-21 | 2014-01-22 | 国家电网公司 | Online monitoring system for ultrahigh-frequency partial discharge of high-voltage parallel reactors of substation |
| CN105188326A (en) * | 2014-05-30 | 2015-12-23 | 国家电网公司 | Filtering system for inhibiting high-frequency strong interference signal of transformer station |
| CN105188326B (en) * | 2014-05-30 | 2018-01-16 | 国家电网公司 | For suppressing the filtering system of transformer station's high frequency high reject signal |
| CN105137312A (en) * | 2015-10-22 | 2015-12-09 | 国网河南禹州市供电公司 | Transformer partial discharge ultrahigh frequency detection device |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110406 Termination date: 20120819 |