CN203037811U - A 10kV cable partial discharge testing system based on anti-corona technology - Google Patents
A 10kV cable partial discharge testing system based on anti-corona technology Download PDFInfo
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- CN203037811U CN203037811U CN 201320079624 CN201320079624U CN203037811U CN 203037811 U CN203037811 U CN 203037811U CN 201320079624 CN201320079624 CN 201320079624 CN 201320079624 U CN201320079624 U CN 201320079624U CN 203037811 U CN203037811 U CN 203037811U
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Abstract
The utility model discloses a 10kV cable partial discharge testing system based on anti-corona technology. The 10kV cable partial discharge testing system comprises a tested cable, a high-voltage power supply, a resonance inductor, a voltage dividing circuit, a partial discharge coupling unit, a high-voltage switch, a computer, and a display module. The output end of the high-voltage power supply is connected with the high-voltage switch and the resonance inductor. The output end of the resonance inductor is connected with the voltage dividing circuit and one end of the tested cable. The other end of the voltage dividing circuit is connected with the computer through the partial discharge coupling unit. The display output end of the computer is connected with the display module. Anti-corona devices are disposed on the two ends of the tested cable. Because the anti-corona devices are disposed on the two ends of the tested cable, interference of corona discharge of the tested cable can be eliminated in order that testing accuracy is substantially increased.
Description
Technical field
The utility model relates to a kind of 10kV cable local discharge test macro, particularly a kind of 10kV cable local discharge test macro based on corona protected technique.
Background technology
At present, for the 10kV cable, the habitual method of testing of judging its quality is that the insulation to tested cable applies high stream high pressure, detect the size of dc leakage-current, but, this method only can be made judgement to whole cable insulation situation, can't put the position to the office of 10kV cable positions, the more important thing is, DC voltage withstand test is actually a kind of destructive test, because a period of time inner insulating layer after removing high direct voltage is still being kept the molecules align of the polarized state that polarizing, particularly in because of the aging various dendritic structures that generate, more difficult the returning to of its molecules align applies high direct voltage state before, and therefore through the cable of DC voltage withstand test test passes, the example of very fast generation dielectric breakdown accident is of common occurrence after putting into operation again.
In January, 2008, Beijing electric power cable companies is drawn the successful experiences of country aspect state-detection such as Singapore, attempts adopting wave of oscillation method cable local discharge assignment test technology that distribution 10kV cable is carried out the shelf depreciation test.In test process, detect and find that several cables have serious partial discharge phenomenon, confirmed the different aspect that these cables exist through the dissection and analysis to cable, problem in various degree, put the detection case analysis of summarizing by the office to hundreds of cables, application wave of oscillation method is tested cable local discharge and located is a very effective technology, and method is simple to operate, judge easily, but in the process that office high-volume calibrates, find that the environmental interference signal is bigger, corona phenomenon appears in joint at cable easily, causes the inaccurate and equipment of the data surveyed to be damaged easily.
Summary of the invention
For addressing the above problem, the purpose of this utility model is to provide a kind of 10kV cable local discharge test macro based on corona protected technique that can effectively prevent from occurring corona discharge when the 10kV cable being carried out the shelf depreciation test.
The technical scheme that the invention for solving the technical problem adopts is:
A kind of 10kV cable local discharge test macro based on corona protected technique, comprise that tested cable, high-voltage power supply, resonant inductance, bleeder circuit, office put coupling unit, high-voltage switch gear, computing machine and display module, the output terminal of described high-voltage power supply connects high-voltage switch gear and resonant inductance respectively, the output terminal of described resonant inductance connects an end of bleeder circuit and above-mentioned tested cable respectively, the other end of bleeder circuit is put coupling unit by office and is connected to computing machine, and the demonstration output terminal of described computing machine connects display module; The two ends of described tested cable also are provided with corona-proofing device.
During work, the high-voltage power supply output DC is forced into preset value at tested cut cable, closed high switch then, at this moment, resonant inductance and tested electric cable capacitance generation resonance, produce damped oscillation voltage at tested cut cable, adopt fixed inductance and cable resonance to produce the sine-wave oscillation ripple at the trial, by bleeder circuit the wave of oscillation that returns is received, put coupling unit by office the signal that returns is handled and transferred to computing machine analysis, calculates, at last by display module display analysis result.
Further, described corona-proofing device is anticorona ball.Adopt anticorona ball can effectively increase the radius-of-curvature of conductor, prevent that conductor from producing the discharge generation corona to air.
Particularly, described anticorona bag is drawn together first hemisphere and second hemisphere, described first hemisphere is provided with erection column, second hemisphere is provided with the mounting hole that is complementary with erection column, first hemisphere is connected with second hemisphere by erection column, and the two ends of described tested cable are provided with the installation through hole that is interspersed on the erection column.This project organization is simple, installation is easy to connect, can effectively improve operating personnel's installation effectiveness.
Further, described high-voltage power supply comprises alternating current input power supplying and rectification circuit, and described alternating current input power supplying, rectification circuit and resonant inductance are connected successively in succession.Alternating current input power supplying is exported high-voltage dc voltage after by the rectification circuit rectification.
Further, described computing machine is connected with the control input end of alternating current input power supplying.Can control the output of alternating current input power supplying by computing machine.
Further, the control input end of described high-voltage switch gear is connected with computing machine.The switching of computer-controllable high-voltage switch gear processed, thus the automatic control of realization high-voltage switch gear does not need manually to operate.
The beneficial effects of the utility model are: a kind of 10kV cable local discharge test macro based on corona protected technique that the utility model adopts, the high-voltage power supply output DC is forced into preset value at tested cut cable, closed high switch then, at this moment, resonant inductance and tested electric cable capacitance generation resonance, produce damped oscillation voltage at tested cut cable, adopt fixed inductance and cable resonance to produce the sine-wave oscillation ripple at the trial, by bleeder circuit the wave of oscillation that returns is received, put coupling unit by office computing machine analysis is handled and transferred to the signal that returns, calculate, at last by display module display analysis result, because the two ends of tested cable are provided with corona-proofing device, therefore the interference of tested cable corona discharge can be got rid of, the accuracy of test can be improved greatly.
Description of drawings
The utility model is described in further detail below in conjunction with accompanying drawing and example.
Fig. 1 is systematic schematic diagram of the present utility model.
Fig. 2 is the structural representation of the utility model corona-proofing device.
Embodiment
With reference to Fig. 1-Fig. 2, a kind of 10kV cable local discharge test macro based on corona protected technique of the present utility model, comprise tested cable 1, high-voltage power supply 2, resonant inductance 3, bleeder circuit 4, coupling unit 5 is put in office, high-voltage switch gear 6, computing machine 7 and display module 8, described high-voltage power supply 2 comprises interconnective alternating current input power supplying 21 and rectification circuit 22, the output terminal of described rectification circuit 22 connects high-voltage switch gear 6 and resonant inductance 3 respectively, the other end of described high-voltage switch gear 6 connects ground wire, the output terminal of described resonant inductance 3 connects an end of bleeder circuit 4 and above-mentioned tested cable 1 respectively, the other end of bleeder circuit 4 is put coupling unit 5 by office and is connected to computing machine 7, and the demonstration output terminal of described computing machine 7 connects display module 8; The two ends of described tested cable 1 also are provided with corona-proofing device 9.
Further, described computing machine 7 is connected with the control input end of alternating current input power supplying 21.Can control the output of alternating current input power supplying 21 by computing machine 7.
Further, the control input end of described high-voltage switch gear 6 is connected with computing machine 7.Computing machine 7 can be controlled the switching of high-voltage switch gear 6, thereby realizes the automatic control of high-voltage switch gear 6, does not need manually to operate.
During work, high-voltage power supply 2 output DCs are forced into preset value at tested cable 1 end, the closed high switch 6 then, at this moment, resonant inductance 3 and tested cable 1 electric capacity generation resonance, produce damped oscillation voltage at tested cable 1 end, adopt fixed inductance and cable resonance to produce the sine-wave oscillation ripple at the trial, receive by 4 pairs of waves of oscillation that return of bleeder circuit, put 5 pairs of signals that return of coupling unit by office and handle and transfer to computing machine 7 and analyze, calculate, at last by display module 8 display analysis results.
With reference to shown in Figure 2, described corona-proofing device 9 is anticorona ball.Adopt anticorona ball can effectively increase the radius-of-curvature of conductor, prevent that conductor from producing the discharge generation corona to air.
Particularly, described anticorona bag is drawn together first hemisphere 91 and second hemisphere 92, described first hemisphere 91 is provided with erection column 93, second hemisphere 92 is provided with the mounting hole 94 that is complementary with erection column 93, first hemisphere 91 is connected with second hemisphere 92 by erection column 93, and the two ends of described tested cable 1 are provided with the installation through hole that is interspersed on the erection column 93.This project organization is simple, installation is easy to connect, can effectively improve operating personnel's installation effectiveness.
The above is preferred embodiment of the present utility model, and the utility model is not limited to above-mentioned embodiment, as long as it reaches technique effect of the present utility model with identical means, all should belong to protection domain of the present utility model.
Claims (6)
1. 10kV cable local discharge test macro based on corona protected technique, it is characterized in that: comprise tested cable (1), high-voltage power supply (2), resonant inductance (3), bleeder circuit (4), coupling unit (5) is put in office, high-voltage switch gear (6), computing machine (7) and display module (8), the output terminal of described high-voltage power supply (2) connects high-voltage switch gear (6) and resonant inductance (3) respectively, the output terminal of described resonant inductance (3) connects an end of bleeder circuit (4) and above-mentioned tested cable (1) respectively, the other end of bleeder circuit (4) is put coupling unit (5) by office and is connected to computing machine (7), and the demonstration output terminal of described computing machine (7) connects display module (8); The two ends of described tested cable (1) also are provided with corona-proofing device (9).
2. a kind of 10kV cable local discharge test macro based on corona protected technique according to claim 1, it is characterized in that: described corona-proofing device (9) is anticorona ball.
3. a kind of 10kV cable local discharge test macro based on corona protected technique according to claim 2, it is characterized in that: described anticorona bag is drawn together first hemisphere (91) and second hemisphere (92), described first hemisphere (91) is provided with erection column (93), second hemisphere (92) is provided with the mounting hole (94) that is complementary with erection column (93), first hemisphere (91) is connected with second hemisphere (92) by erection column (93), and the two ends of described tested cable (1) are provided with the installation through hole that is interspersed on the erection column (93).
4. according to the arbitrary described a kind of 10kV cable local discharge test macro based on corona protected technique of claim 1-3, it is characterized in that: described high-voltage power supply (2) comprises alternating current input power supplying (21) and rectification circuit (22), and described alternating current input power supplying (21), rectification circuit (22) and resonant inductance (3) are connected successively in succession.
5. a kind of 10kV cable local discharge test macro based on corona protected technique according to claim 4, it is characterized in that: described computing machine (7) is connected with the control input end of alternating current input power supplying (21).
6. a kind of 10kV cable local discharge test macro based on corona protected technique according to claim 4, it is characterized in that: the control input end of described high-voltage switch gear (6) is connected with computing machine (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320079624 CN203037811U (en) | 2013-02-20 | 2013-02-20 | A 10kV cable partial discharge testing system based on anti-corona technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320079624 CN203037811U (en) | 2013-02-20 | 2013-02-20 | A 10kV cable partial discharge testing system based on anti-corona technology |
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| Publication Number | Publication Date |
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| CN203037811U true CN203037811U (en) | 2013-07-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201320079624 Expired - Lifetime CN203037811U (en) | 2013-02-20 | 2013-02-20 | A 10kV cable partial discharge testing system based on anti-corona technology |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110531235A (en) * | 2019-10-16 | 2019-12-03 | 四川大学 | Serial connection charge formula vibrates wave circuit, cable local discharge test device and method |
| CN112782545A (en) * | 2021-03-18 | 2021-05-11 | 西安热工研究院有限公司 | Method for testing partial discharge of generator |
-
2013
- 2013-02-20 CN CN 201320079624 patent/CN203037811U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110531235A (en) * | 2019-10-16 | 2019-12-03 | 四川大学 | Serial connection charge formula vibrates wave circuit, cable local discharge test device and method |
| CN112782545A (en) * | 2021-03-18 | 2021-05-11 | 西安热工研究院有限公司 | Method for testing partial discharge of generator |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 510260 Guangdong city of Guangzhou province Haizhuqu District Tai Sha Lu No. 80 Patentee after: GUANGZHOU SOUTHERN ELECTRIC POWER TECHNOLOGY ENGINEERING Co.,Ltd. Address before: 510260 Guangdong city of Guangzhou province Haizhuqu District Tai Sha Lu No. 80 Patentee before: GUANGZHOU SOUTHERN POWER GROUP TECHNOLOGY Co.,Ltd. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130703 |