CN202033450U - Detection system for insulation aging of cross-linked polyethylene (XLPE) cable - Google Patents
Detection system for insulation aging of cross-linked polyethylene (XLPE) cable Download PDFInfo
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- CN202033450U CN202033450U CN2011200427846U CN201120042784U CN202033450U CN 202033450 U CN202033450 U CN 202033450U CN 2011200427846 U CN2011200427846 U CN 2011200427846U CN 201120042784 U CN201120042784 U CN 201120042784U CN 202033450 U CN202033450 U CN 202033450U
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Abstract
The utility model provides a detection system for insulation aging of a cross-linked polyethylene (XLPE) cable, which is used for detecting local discharge of the cross-linked polyethylene cable and accessories. The system comprises an ultrahigh frequency monitoring module, an acoustic emission monitoring module and a data processing module, wherein the ultrahigh frequency monitoring module is used for monitoring ultrahigh frequency signals generated due to local discharge, the acoustic emission monitoring module is used for monitoring acoustic emission signals generated due to local discharge, and the data processing module is used for connecting the ultrahigh frequency monitoring module with the acoustic emission monitoring module and is used for analyzing and displaying the ultrahigh frequency signals and the acoustic emission signals; and the data processing module is further connected with a detection database used for storing data and an external applied voltage measuring module used for applying external detection voltage. The detection system for the insulation aging of the cross-linked polyethylene cable can respectively detect the high frequency signals and an acoustic wave due to local discharge of the XLPE cable and the accessories through the ultrahigh frequency monitoring module and the acoustic emission monitoring module, thus improving the detection accuracy and sensitivity and enhancing the efficiency.
Description
[technical field]
The utility model relates to electrical equipment technical field, especially relates to the aging detection system of a kind of crosslinking polyethylene-insulated cable insulation.
[background technology]
Because crosslinked polyethylene (XLPE) cable is simpler than oil-filled cable easy construction, operation maintenance, therefore, twisted polyethylene cable application at home and abroad in recent years becomes main flow day by day.Yet because the history that twisted polyethylene cable is used is not long, it is used also practice test without the expected service life time limit (more than 40 years), and having a great deal of cable just entering the midlife of expected service life now, the phenomenon of some twisted polyethylene cable and annex generation insulation damages fault thereof has appearred.Therefore, should attract great attention to the aging problem of crosslinking polyethylene-insulated cable insulation.
The reason that crosslinking polyethylene-insulated cable insulation is aging relates generally to factors such as heat, electricity, machinery and environment, and with regard to high-voltage cross-linking polythene cable, shelf depreciation (PD) is to cause the one of the main reasons of twisted polyethylene cable and annex insulation breakdown thereof.Because the frequency band of conventional cable local discharge measuring method is lower, be subject to the influence of background interference, so this method is not suitable for the detection of twisted polyethylene cable; Also have ultra high frequency detection technology is applied on the crosslinked cable shelf depreciation online measuring technique, and with the office that the acoustic energy detection technique is applied to twisted polyethylene cable and annex put detect and the location in, but the decay of this method medium-high frequency signal and sonic propagation is very fast, detects the sensitivity and the accuracy of PD and location thereby reduced it.
[utility model content]
The technical problems to be solved in the utility model is, at the lower defective of accuracy of the twisted polyethylene cable Partial Discharge Detection of prior art, provides the higher crosslinking polyethylene-insulated cable insulation of a kind of accuracy detection system that wears out.
In order to solve the problems of the technologies described above, the utility model provides a kind of crosslinking polyethylene-insulated cable insulation detection system that wears out, and is used for the detection of twisted polyethylene cable and annex shelf depreciation, and described system comprises:
The one ultrahigh frequency monitoring module that is used to monitor the ultra-high frequency signal that shelf depreciation produces,
One be used to monitor the acoustic emission signal that shelf depreciation produces the acoustic emission monitor(ing) module and
One be connected in described ultrahigh frequency monitoring module and acoustic emission monitor(ing) module, be used to analyze the data processing module that shows described ultra-high frequency signal and acoustic emission signal;
Described data processing module also is connected with one and is used to the applied voltage measurement module storing the detection database of data and be used to apply external detection voltage.
Further, in the aging detection system of above-mentioned crosslinking polyethylene-insulated cable insulation, described ultrahigh frequency monitoring module comprises:
One be used to monitor the ultra-high frequency signal that shelf depreciation produces uhf sensor and
Be connected in described uhf sensor and be used for the ultra-high frequency signal that is monitored by described uhf sensor is carried out pretreated ultra-high frequency signal pretreatment unit.
Further, in the aging detection system of above-mentioned crosslinking polyethylene-insulated cable insulation, described uhf sensor is located at the discontinuous place of outer cover metal body of twisted polyethylene cable and annex.
Further, in the aging detection system of above-mentioned crosslinking polyethylene-insulated cable insulation, the shell of described uhf sensor only one side is not established metallic shield.
Further, in the aging detection system of above-mentioned crosslinking polyethylene-insulated cable insulation, described uhf sensor is located at the insulating flange position of isolating joint in twisted polyethylene cable and the annex.
Further, in the aging detection system of above-mentioned crosslinking polyethylene-insulated cable insulation, described uhf sensor is an external, and it detects frequency is 300MHz to 1.1GHz.
Further, in the aging detection system of above-mentioned crosslinking polyethylene-insulated cable insulation, described acoustic emission monitor(ing) module comprises that a calibrate AE sensor, that is arranged on setting regions is used for the acoustic emission signal that is monitored by calibrate AE sensor is carried out the acoustic emission signal converting unit that pretreated acoustic emission signal pretreatment unit and is used for the detected or pretreated acoustic emission signal of described calibrate AE sensor is transferred to sub-audible sound.
Further, in the aging detection system of above-mentioned crosslinking polyethylene-insulated cable insulation, the resonance frequency of described calibrate AE sensor is 30kHz, and survey frequency is 10kHz to 500kHz.
Further, in the aging detection system of above-mentioned crosslinking polyethylene-insulated cable insulation, described data processing module comprises:
One ultra-high frequency signal that is used for described uhf sensor is monitored carries out spectrum analysis, and is detecting the spectrum analyzer that carries out the single-frequency tracking in the frequency band one after the frequency examination;
One is used for a oscillograph and an acoustic emission detector that the waveform of the ultra-high frequency signal that receives is analyzed and shown;
One is used for acoustic emission detector that the acoustic emission signal that receives is analyzed and shown.
Further, in the aging detection system of above-mentioned crosslinking polyethylene-insulated cable insulation, described oscillograph is selected the broadband high-speed oscillograph for use.
The crosslinked aging detection system of PE cable insulation of the utility model detects the high-frequency signal and the sound wave of XLPE cable and attached shelf depreciation respectively by ultrahigh frequency monitoring module and acoustic emission monitor(ing) module simultaneously, improved the accuracy and the sensitivity that detect, efficient is higher.
[description of drawings]
The utility model is described in further detail below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the structural representation of the aging detection system preferred embodiment of the utility model crosslinking polyethylene-insulated cable insulation;
Fig. 2 is the structural representation of the ultrahigh frequency monitoring module among Fig. 1;
Fig. 3 is the structural representation of the acoustic emission monitor(ing) module among Fig. 1;
Fig. 4 is the structural representation of the data processing module among Fig. 1.
[embodiment]
See also Fig. 1, Fig. 1 is the structural representation of the aging detection system preferred embodiment of the utility model crosslinking polyethylene-insulated cable insulation.The aging detection system 1 of crosslinking polyethylene-insulated cable insulation is used for the detection of XLPE cable and annex shelf depreciation, it comprises a ultrahigh frequency monitoring module 10, acoustic emission monitor(ing) module 11 and data processing module 13, wherein, ultrahigh frequency monitoring module 10, acoustic emission monitor(ing) module 11 all are connected in data processing module 13, ultrahigh frequency monitoring module 10 is used to monitor the ultra-high frequency signal that shelf depreciation produces, acoustic emission monitor(ing) module 11 is used to monitor the acoustic emission signal that shelf depreciation produces, and data processing module 13 is used to analyze and shows described ultra-high frequency signal and acoustic emission signal.Data processing module 13 also is connected with one and is used to the applied voltage measurement module 12 storing the detection database 14 of data and be used to apply external detection voltage.
See also Fig. 2, Fig. 2 is the structural representation of the ultrahigh frequency monitoring module 10 among Fig. 1, described ultrahigh frequency monitoring module 10 comprises a uhf sensor 101 and is attached thereto and is used for the ultra-high frequency signal that is monitored by described uhf sensor 101 is carried out pretreated ultra-high frequency signal pretreatment unit 102, wherein, uhf sensor 101 is arranged on described XLPE cable and annex relevant position, generally speaking, described uhf sensor 101 can be located at described XLPE cable and the discontinuous place of annex outer cover metal body.
As an embodiment of the present utility model, uhf sensor 101 is located at the insulating flange position of isolating joint in XLPE cable and the annex.
As an embodiment of the present utility model, uhf sensor 101 is an external, it detects frequency is 300MHz to 1.1GHz, and the shell of uhf sensor 101 wherein five faces all be provided with metallic shield, only one side does not shield with directional couple uhf electromagnetic wave signal.
Ultrahigh frequency monitoring module 10 is to utilize described uhf sensor 101 to monitor ultra-high frequency signal, and the ultra-high frequency signal that monitors is sent to described ultra-high frequency signal pretreatment unit 102, ultra-high frequency signal is carried out being sent to the ultra-high frequency signal of data processing module 13 with optimization as the pre-service of amplifying, filtering and removing is made an uproar etc.
See also Fig. 3, Fig. 3 is the structural representation of the acoustic emission monitor(ing) module 11 among Fig. 1.Described acoustic emission monitor(ing) module 11 comprises that a calibrate AE sensor 111, that is arranged on setting regions is used for the acoustic emission signal that is monitored by calibrate AE sensor 111 is carried out the acoustic emission signal converting unit 113 that pretreated acoustic emission signal pretreatment unit 112 and is used for acoustic emission signal is transferred to sub-audible sound.This acoustic emission monitor(ing) module 11 is to utilize above-mentioned calibrate AE sensor 111 monitoring acoustic emission signals, and the acoustic emission signal that monitors is sent to described acoustic emission signal pretreatment unit 112, acoustic emission signal is carried out being sent to the acoustic emission signal of data processing module 13 with optimization as the pre-service of amplifying, filtering and removing is made an uproar etc.
As an embodiment of the present utility model, the acoustic emission signal that described acoustic emission signal converting unit 113 can be monitored by calibrate AE sensor 111, also can be with being converted to sub-audible sound through pretreated acoustic emission signal, so that judge discharge scenario according to the variation of sub-audible sound by acoustic emission signal pretreatment unit 112.
As an embodiment of the present utility model, the resonance frequency of calibrate AE sensor 111 is 30kHz, and survey frequency is 10kHz to 500kHz.
As an embodiment of the present utility model, the acoustic emission signal that monitors can be sent into oscillograph 132 storages among Fig. 4 and handle, and also can transfer sub-audible sound to by above-mentioned acoustic emission signal converting unit 113, is convenient to the testing staff and judges whether sub-audible sound is unusual.
See also Fig. 4, Fig. 4 is the structural representation of data processing module 13 among Fig. 1.Described data processing module 13 comprises a spectrum analyzer 131, an oscillograph 132 and an acoustic emission detector 133.Wherein, the ultra-high frequency signal that spectrum analyzer 131 is used for uhf sensor 101 is monitored carries out spectrum analysis, and is carrying out the single-frequency tracking after the frequency examination in a detection frequency band.It is to utilize spectrum analyzer 131 to select the ultra-high frequency signal of single-frequency that described single-frequency is followed the tracks of, and the amplitude of its signal is carried out Continuous Tracking; Oscillograph 132 is used for the waveform of ultra-high frequency signal that receives and acoustic emission signal is analyzed and shown; Acoustic emission detector 133 is that the acoustic emission signal that receives is analyzed and shown.
As an embodiment of the present utility model, oscillograph 132 is selected the broadband high-speed oscillograph for use.
The aging detection system course of work of the utility model crosslinking polyethylene-insulated cable insulation is as follows:
At first apply the external detection voltage of a simulation shelf depreciation, produce a ultra-high frequency signal and acoustic emission signal by applied voltage measurement module 12; Then, the uhf sensor 101 that is arranged on described XLPE cable and annex relevant position to be detected monitors ultra-high frequency signal, and the ultra-high frequency signal that monitors is sent to ultra-high frequency signal pretreatment unit 102,102 pairs of these ultra-high frequency signals of ultra-high frequency signal pretreatment unit carry out as the pre-service of amplifying, filtering and removing is made an uproar etc., and are sent to data processing module 13; At last, after data processing module 13 is received this ultra-high frequency signal, by spectrum analyzer 131 it is carried out spectrum analysis, and in a detection frequency band, carrying out the single-frequency tracking after the frequency examination, and show by the waveform of 132 pairs of ultra-high frequency signals that receive of oscillograph, and be analyzed from the waveform that detects ultra-high frequency signal under the normal condition that database 14 reads, whether normal to judge this twisted polyethylene cable cable and annex shelf depreciation.
In like manner, the calibrate AE sensor 111 that is arranged on setting regions monitors the acoustic emission signal that applied voltage measurement module 12 produces, the acoustic emission signal that monitors is sent to described acoustic emission signal pretreatment unit 112, acoustic emission signal is carried out as the pre-service of amplifying, filtering and removing is made an uproar etc., and be sent to data processing module 13; At last, acoustic emission signal after this processing sends to acoustic emission detector 133 storages, and the waveform to acoustic emission signal shows, be analyzed with the waveform of acoustic emission signal under the normal condition that reads from detection database 14, whether normal to judge this twisted polyethylene cable and annex shelf depreciation; Also can transfer sub-audible sound to, be convenient to the testing staff and judge whether sub-audible sound is unusual by above-mentioned acoustic emission signal converting unit 113.
Than prior art, the crosslinked aging detection system of PE cable insulation of the utility model detects the high-frequency signal and the sound wave of XLPE cable and attached shelf depreciation respectively by ultrahigh frequency monitoring module and acoustic emission monitor(ing) module simultaneously, improved the accuracy and the sensitivity that detect, efficient is higher.
The above embodiment has only expressed several embodiment of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model claim.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the utility model design, can also make some distortion and improvement, these all belong to protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be as the criterion with claims.
Claims (10)
1. the aging detection system of crosslinking polyethylene-insulated cable insulation is used for the detection of twisted polyethylene cable and annex shelf depreciation, it is characterized in that described system comprises:
The one ultrahigh frequency monitoring module that is used to monitor the ultra-high frequency signal that shelf depreciation produces,
One be used to monitor the acoustic emission signal that shelf depreciation produces the acoustic emission monitor(ing) module and
One be connected in described ultrahigh frequency monitoring module and acoustic emission monitor(ing) module, be used to analyze the data processing module that shows described ultra-high frequency signal and acoustic emission signal;
Described data processing module also is connected with one and is used to the applied voltage measurement module storing the detection database of data and be used to apply external detection voltage.
2. the crosslinking polyethylene-insulated cable insulation according to claim 1 detection system that wears out, it is characterized in that: described ultrahigh frequency monitoring module comprises:
One be used to monitor the ultra-high frequency signal that shelf depreciation produces uhf sensor and
Be connected in described uhf sensor and be used for the ultra-high frequency signal that is monitored by described uhf sensor is carried out pretreated ultra-high frequency signal pretreatment unit.
3. the crosslinking polyethylene-insulated cable insulation according to claim 2 detection system that wears out, it is characterized in that: described uhf sensor is located at the discontinuous place of outer cover metal body of twisted polyethylene cable and annex.
4. the crosslinking polyethylene-insulated cable insulation according to claim 2 detection system that wears out is characterized in that: the shell of described uhf sensor only one side is not established metallic shield.
5. according to the aging detection system of each described crosslinking polyethylene-insulated cable insulation of claim 2 to 4, it is characterized in that: described uhf sensor is located at the insulating flange position of isolating joint in twisted polyethylene cable and the annex.
6. the crosslinking polyethylene-insulated cable insulation according to claim 2 detection system that wears out, it is characterized in that: described uhf sensor is an external, it detects frequency is 300MHz to 1.1GHz.
7. the crosslinking polyethylene-insulated cable insulation according to claim 1 detection system that wears out, it is characterized in that: described acoustic emission monitor(ing) module comprises that a calibrate AE sensor, that is arranged on setting regions is used for the acoustic emission signal that is monitored by calibrate AE sensor is carried out the acoustic emission signal converting unit that pretreated acoustic emission signal pretreatment unit and is used for the detected or pretreated acoustic emission signal of described calibrate AE sensor is transferred to sub-audible sound.
8. the crosslinking polyethylene-insulated cable insulation according to claim 7 detection system that wears out, it is characterized in that: the resonance frequency of described calibrate AE sensor is 30kHz, survey frequency is 10kHz to 500kHz.
9. the crosslinking polyethylene-insulated cable insulation according to claim 1 detection system that wears out, it is characterized in that: described data processing module comprises:
One ultra-high frequency signal that is used for described uhf sensor is monitored carries out spectrum analysis, and is detecting the spectrum analyzer that carries out the single-frequency tracking in the frequency band one after the frequency examination;
One is used for a oscillograph and an acoustic emission detector that the waveform of the ultra-high frequency signal that receives is analyzed and shown;
One is used for acoustic emission detector that the acoustic emission signal that receives is analyzed and shown.
10. the crosslinking polyethylene-insulated cable insulation according to claim 9 detection system that wears out, it is characterized in that: described oscillograph is selected the broadband high-speed oscillograph for use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200427846U CN202033450U (en) | 2011-02-21 | 2011-02-21 | Detection system for insulation aging of cross-linked polyethylene (XLPE) cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200427846U CN202033450U (en) | 2011-02-21 | 2011-02-21 | Detection system for insulation aging of cross-linked polyethylene (XLPE) cable |
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| Publication Number | Publication Date |
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| CN202033450U true CN202033450U (en) | 2011-11-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011200427846U Expired - Lifetime CN202033450U (en) | 2011-02-21 | 2011-02-21 | Detection system for insulation aging of cross-linked polyethylene (XLPE) cable |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103795342A (en) * | 2014-03-06 | 2014-05-14 | 江苏万宇电能科技有限公司 | Device and method for detecting EVA cross linking degree through sound waves |
| CN106154129A (en) * | 2016-07-22 | 2016-11-23 | 中国石油化工股份有限公司 | Wireless superfrequency GIS partial discharge detection method |
| CN106291270A (en) * | 2016-07-22 | 2017-01-04 | 中国石油化工股份有限公司 | GIS partial discharge supersonic detection method based on radio communication |
-
2011
- 2011-02-21 CN CN2011200427846U patent/CN202033450U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103795342A (en) * | 2014-03-06 | 2014-05-14 | 江苏万宇电能科技有限公司 | Device and method for detecting EVA cross linking degree through sound waves |
| CN103795342B (en) * | 2014-03-06 | 2016-05-04 | 江苏万宇电能科技有限公司 | A kind of device and method that utilizes the sonic detection EVA degree of cross linking |
| CN106154129A (en) * | 2016-07-22 | 2016-11-23 | 中国石油化工股份有限公司 | Wireless superfrequency GIS partial discharge detection method |
| CN106291270A (en) * | 2016-07-22 | 2017-01-04 | 中国石油化工股份有限公司 | GIS partial discharge supersonic detection method based on radio communication |
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Granted publication date: 20111109 |
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