CN203759192U - Simulated testing platform for simulated partial electricity discharge of a cross-linked polyethylene insulated cable - Google Patents
Simulated testing platform for simulated partial electricity discharge of a cross-linked polyethylene insulated cable Download PDFInfo
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- CN203759192U CN203759192U CN201420136844.4U CN201420136844U CN203759192U CN 203759192 U CN203759192 U CN 203759192U CN 201420136844 U CN201420136844 U CN 201420136844U CN 203759192 U CN203759192 U CN 203759192U
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- 229920003020 cross-linked polyethylene Polymers 0.000 title claims abstract description 33
- 239000004703 cross-linked polyethylene Substances 0.000 title claims abstract description 33
- 238000012360 testing method Methods 0.000 title abstract description 15
- 230000005611 electricity Effects 0.000 title abstract description 4
- 230000008054 signal transmission Effects 0.000 claims abstract description 10
- 238000001514 detection method Methods 0.000 claims description 27
- 230000001360 synchronised effect Effects 0.000 claims description 4
- 230000005284 excitation Effects 0.000 abstract 2
- 230000007547 defect Effects 0.000 description 40
- 238000004088 simulation Methods 0.000 description 12
- 238000001228 spectrum Methods 0.000 description 9
- 239000011800 void material Substances 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000004308 accommodation Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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- Testing Relating To Insulation (AREA)
Abstract
The utility model discloses a simulated testing platform for simulated partial electricity discharge of a cross-linked polyethylene insulated cable. The testing platform belongs to the technical field of electric power cable electricity testing. The testing platform comprises a frequency changing power supply control box whose output end is connected to the input end of an excitation transformer; the output end of the excitation transformer is connected with a lightning arrester and a resonance reactor respectively. The output end of the lightning arrester and a voltage separator are connected with to-be-tested electric cables A to E through switches A to E. The other end of the voltage separator is connected with the frequency changing power supply control box through a signal acquiring wire. A low frequency current sensor is connected with a partial discharge measuring instrument through a synchronizing signal transmission line. A high frequency current sensor is connected with the partial discharge measuring instrument through a partial discharge signal transmission wire. The partial discharge measuring instrument is connected with a photoelectric converter which is connected with a terminal processor. The testing platform of the utility model is capable of simulating five typical faults found in electric cables and substantially increases the recognizing ability of XLPE electric cables to spot partial discharge failures. The testing platform of the utility model is simple to operate and has an increased recognizing ability of XLPE electric cables to spot partial discharge failures. These advantages enable it to be widely applied and to provide reliable performances.
Description
Technical field
The utility model belongs to the charged detection technique of power cable field, relates in particular to a kind of simulation cross-linked polyethylene insulated cable shelf depreciation analog detection platform.
Background technology
Crosslinked polyethylene (XLPE) cable occupies extremely important status in urban electricity supply electrical network, and its safe operation is most important to stablizing of whole electric system.Partial Discharge Detection is evaluate XLPE cable insulation status, expection operation life and ensure one of important method of power cable safe and reliable operation.
In recent years, the charged detection technique of cable local discharge, in XLPE cable routine is patrolled and examined, is more and more applied.But, because scene exists various undesired signal that is difficult to expectation, the validity of the charged detection technique of shelf depreciation is on the low side, more need the experience and knowledge level that depends on testing staff qualitatively fault to be judged, this just requires testing staff fully to understand advantage, shortcoming and the validity of the charged detection technique of XLPE cable shelf depreciation.Conventionally, can only roughly provide the defect type that equipment may exist according to testing result, cannot provide clear and definite criterion, especially not deep enough in being related to aspect research of defect type and degree and signal characteristic, cannot provide conclusive data to remove checking corresponding relation between the two.For this reason, need badly and a set ofly can simulate the different defect types of XLPE cable, realize defect type drawn game and put between detection technique validity detection method for local discharge and analog detection platform one to one.
Summary of the invention
For overcoming the technical matters existing in above-mentioned prior art, the utility model provides a kind of simulation cross-linked polyethylene insulated cable shelf depreciation analog detection platform, object is to improve XLPE cable partial discharges fault recognition capability, reduces the workload that testing staff evaluates.
For achieving the above object, the technical scheme that the utility model adopts is:
Simulation cross-linked polyethylene insulated cable shelf depreciation analog detection platform, by the output terminal of variable-frequency power sources control box, to be connected to the input end of exciting transformer, the output terminal of described exciting transformer connects respectively lightning arrester and resonance reactor, the output terminal of described lightning arrester is connected with described detected cable A～cable E by switch A～switch E with voltage divider respectively, and the other end of voltage divider is connected with variable-frequency power sources control box by described collection signal line; Described low-frequency current sensor is put measuring instrument by synchronous transmission of signal line with office and is connected; High Frequency Current Sensor is put measuring instrument by Partial discharge signal transmission line with office and is connected; Described office puts measuring instrument and is connected with photoelectric commutator, and described photovoltaic converter is connected with terminal handler.
Special character of the present utility model is, can be by the artificial 5 kinds of dissimilar typical defects of XLPE cable of manufacturing, in order to simulate the different defect types of XLPE cable, according to the feature of the output signal of this analog detection platform, realize the judgement of defect type and degree, defect type is put to detection technique validity with office and be mapped one by one, thereby improve XLPE cable partial discharges fault recognition capability.
Effective effect of the present utility model is: solve when doing XLPE cable Partial Discharge Detection, according to testing result, clearly judge the detected existing defect type of cable, significantly improve the detection level of cross-linked polyethylene insulated cable partial discharges fault, and can reduce the workload that testing staff evaluates.The utlity model has simple to operate, improve XLPE cable partial discharges fault recognition capability, wide accommodation, safe and reliable feature.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model patent is further described in detail.
Fig. 1 is structural representation of the present utility model.
In figure: variable-frequency power sources control box 1, exciting transformer 2, lightning arrester 3, resonance reactor 4, voltage divider 5, switch A6, switch B7, switch C8, switch D9, switch E10, cable A11, cable B12, cable C13, cable D14, cable E15, collection signal line 16, low-frequency current sensor 17, synchronous transmission of signal line 18, High Frequency Current Sensor 19, Partial discharge signal transmission line 20, measuring instrument 21 is put, photoelectric commutator 22, terminal handler 23 in office.
Embodiment
As shown in Figure 1, the utility model is a kind of simulation cross-linked polyethylene insulated cable shelf depreciation analog detection platform.
The method of simulation cross-linked polyethylene insulated cable shelf depreciation is: simulate accurately five kinds of different defect types of XLPE cable, realize defect type drawn game and put between detection technique validity corresponding one by one:
First, set up the spectrum library of XLPE cable shelf depreciation;
Secondly, by artificial manufacture cross-linked polyethylene insulated cable cable intermediate joint, make needle point defect 1, cable intermediate joint making void defects 2, cable insulation electronegative potential making tool marks defect 3, tag electronegative potential making needle point defect 4 and tag electronegative potential and make the dissimilar typical defect of void defects 5;
Finally, according to the feature of the output signal of this analog detection platform, realize the judgement of defect type and degree, defect type and Partial Discharge Detecting Technology validity are mapped one by one.
Special character of the present utility model is, can simulate accurately five kinds of different defect types of XLPE cable, realizes defect type drawn game and puts between detection technique validity corresponding one by one.
Wherein set up the spectrum library of XLPE cable shelf depreciation, the spectrum library of described shelf depreciation comprises some shelf depreciation kinds.Be processing, the analysis by cable discharge pulse signal is carried out, set up the spectrum library of cable local discharge.
In order to obtain the spectrum library of described shelf depreciation, first in testing laboratory, the typical defect of various representative cables is studied.By test, obtain the mass data in discharge data storehouse, through the statistical study to mass data, according to time domain distribution, the spectrum distribution to cable discharge pulse signal, the spectrogram of frequency range, signal statistics and character separation spectrogram are classified to shelf depreciation, thereby form shelf depreciation spectrum library.
Can be by artificially manufacture cross-linked polyethylene insulated cable cable intermediate joint making needle point defect 1, cable intermediate joint are made void defects 2, cable insulation electronegative potential is made tool marks defect 3, tag electronegative potential making needle point defect 4 and the dissimilar typical defect of tag electronegative potential making void defects 5, in order to simulate five kinds of different defect types of XLPE cable, according to the feature of the output signal of this analog detection platform, realize the judgement of defect type and degree, defect type and Partial Discharge Detecting Technology validity are mapped one by one.
The method of the utility model simulation cross-linked polyethylene insulated cable shelf depreciation and the instruction card of 5 kinds of typical defects of analog detection platform simulation, refer to table 1.
Dummycable typical defect 1: tested cable A11 is discharged and ground connection.Open the power supply of variable-frequency power sources control box 1, make the output voltage of exciting transformer 2 reach cable local discharge detection voltage, the A6 that closes a switch, carries out the simulation of defect 1.After switch A6 closure, synchronizing signal and Partial discharge signal carry out respectively the transmission of settling signal by low-frequency current sensor 17 and High Frequency Current Sensor 19, measuring instrument 21 is put in the resulting signal office of entering into, then transfer in photoelectric commutator 22, carry out signal conversion, finally data are delivered to terminal handler 23 and analyze, and analysis result and shelf depreciation spectrum library are compared, thereby judge the defect type of cable, and result is shown.
Further, dummycable typical defect 2～5 o'clock: tested cable B12～cable E15 is discharged and ground connection.Open the power supply of variable-frequency power sources control box 1, make the output voltage of exciting transformer 2 reach cable local discharge detection voltage, B7～switch E10 that closes a switch respectively, carries out the simulation of defect 2～5.Dummycable typical defect 2～5: tested cable B12～cable E15 is discharged and ground connection; Open the power supply of variable-frequency power sources control box 1, make the output voltage of exciting transformer 2 reach cable local discharge detection voltage, B7～switch E10 that closes a switch respectively, carries out the simulation of defect 2～5; After switch B7～switch E10 closure, synchronizing signal and Partial discharge signal carry out respectively the transmission of settling signal by low-frequency current sensor 17 and High Frequency Current Sensor 19, measuring instrument 21 is put in the resulting signal office of entering into, then transfer in photoelectric commutator 22, carry out signal conversion, finally data are delivered to terminal handler 23 and analyze, and analysis result and shelf depreciation spectrum library are compared, thereby judge the defect type of cable, and result is shown.
The analog detection platform of simulation cross-linked polyethylene insulated cable shelf depreciation is: the input end that is connected to exciting transformer 2 by the output terminal of variable-frequency power sources control box 1, the output terminal of described exciting transformer 2 connects respectively lightning arrester 3 and resonance reactor 4, the output terminal of described lightning arrester 3 is connected with described detected cable A11～cable E15 by switch A6～switch E10 with voltage divider 5 respectively, and the other end of voltage divider 5 is connected with variable-frequency power sources control box 1 by described collection signal line 16.Described low-frequency current sensor 17 is put measuring instrument 21 by synchronous transmission of signal line 18 with office and is connected; High Frequency Current Sensor 19 is put measuring instrument 21 by Partial discharge signal transmission line 20 with office and is connected.Described office puts measuring instrument 21 and is connected with photoelectric commutator 22, and described photovoltaic converter 22 is connected with terminal handler 23.
Above-mentioned embodiment is preferred embodiment of the present utility model; can not limit the utility model; can determine concrete embodiment according to the technical solution of the utility model and actual conditions; other any change or other equivalent substitute mode of making for deviating from the technical scheme of the utility model patent, within being included in protection domain of the present utility model.
Claims (1)
1. simulate cross-linked polyethylene insulated cable shelf depreciation analog detection platform, it is characterized in that: the output terminal of variable-frequency power sources control box (1) is connected to the input end of exciting transformer (2), the output terminal of described exciting transformer (2) connects respectively lightning arrester (3) and resonance reactor (4), the output terminal of described lightning arrester (3) respectively with voltage divider (5) by switch A(6)～switch E(10) and with detected cable A(11)～cable E(15) be connected, the other end of voltage divider (5) is connected with variable-frequency power sources control box (1) by collection signal line (16), low-frequency current sensor (17) is put measuring instrument (21) by synchronous transmission of signal line (18) with office and is connected, High Frequency Current Sensor (19) is put measuring instrument (21) by Partial discharge signal transmission line (20) with office and is connected, described office puts measuring instrument (21) and is connected with photoelectric commutator (22), and described photovoltaic converter (22) is connected with terminal handler (23).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420136844.4U CN203759192U (en) | 2014-03-25 | 2014-03-25 | Simulated testing platform for simulated partial electricity discharge of a cross-linked polyethylene insulated cable |
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| CN201420136844.4U CN203759192U (en) | 2014-03-25 | 2014-03-25 | Simulated testing platform for simulated partial electricity discharge of a cross-linked polyethylene insulated cable |
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| CN203759192U true CN203759192U (en) | 2014-08-06 |
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| CN201420136844.4U Expired - Lifetime CN203759192U (en) | 2014-03-25 | 2014-03-25 | Simulated testing platform for simulated partial electricity discharge of a cross-linked polyethylene insulated cable |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103926512A (en) * | 2014-03-25 | 2014-07-16 | 国家电网公司 | Method for simulating XLPE insulated cable partial discharge and simulation testing platform |
| CN112697551A (en) * | 2020-12-04 | 2021-04-23 | 广东电网有限责任公司江门供电局 | Method for manufacturing tangential tool mark defect of cable main insulation-stress cone edge surface |
-
2014
- 2014-03-25 CN CN201420136844.4U patent/CN203759192U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103926512A (en) * | 2014-03-25 | 2014-07-16 | 国家电网公司 | Method for simulating XLPE insulated cable partial discharge and simulation testing platform |
| CN103926512B (en) * | 2014-03-25 | 2016-08-17 | 国家电网公司 | The method of simulation cross-linked polyethylene insulated cable shelf depreciation and analog detection platform |
| CN112697551A (en) * | 2020-12-04 | 2021-04-23 | 广东电网有限责任公司江门供电局 | Method for manufacturing tangential tool mark defect of cable main insulation-stress cone edge surface |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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Granted publication date: 20140806 |
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