CN203365619U - System for detecting and positioning partial discharge of cable oscillation waves - Google Patents
System for detecting and positioning partial discharge of cable oscillation waves Download PDFInfo
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- CN203365619U CN203365619U CN 201320507625 CN201320507625U CN203365619U CN 203365619 U CN203365619 U CN 203365619U CN 201320507625 CN201320507625 CN 201320507625 CN 201320507625 U CN201320507625 U CN 201320507625U CN 203365619 U CN203365619 U CN 203365619U
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Abstract
The utility model discloses a system for detecting and positioning partial discharge of cable oscillation waves. The system comprises a DC high-voltage apparatus, an IGBT (insulated gate bipolar transistor) high-voltage switch, a resonant inductor, a voltage divider, a partial discharge coupling unit, a filter and a data analyzing and collecting unit, wherein the data analyzing and collecting unit is connected with the DC high-voltage apparatus and the IGBT high-voltage switch, the output end of the DC high-voltage apparatus is connected with the IGBT high-voltage switch and the resonant inductor, the resonant inductor is connected with a tested cable and the voltage divider, the voltage divider is connected with the data analyzing and collecting unit through the partial discharge coupling unit and the filter, and the data analyzing and collecting unit is further provided with a communication interface used for outputting detection data to external equipment. The system disclosed by the utility model uses damped oscillation voltage as test voltage, carries out a step-by-step voltage applying test on the tested cable and collects data, and the partial discharge amount, the concentration degree and the position of the partial discharge of the cable are acquired through data analysis.
Description
Technical field
The utility model relates to a kind of cable local discharge detection system, particularly relates to a kind of cable oscillation wave partial discharge position detecting system.
Background technology
Long-term facts have proved, shelf depreciation is the main cause that causes power cable insulation to destroy.Because cable is in manufacture and joint operating process, the impurity that insulation course inside is prone to, micropore, semi-conductive layer projection and lamination defect, all can cause the generation of shelf depreciation.And the gases at high pressure of the electric discharge of continuous demolition and discharge generation all can make insulator produce fine fisssure, thereby develop into electric branch.Only cross over the part of insulation course when shelf depreciation is initial, but can constantly destroy insulating material, finally cause insulation breakdown.Visible, power cable partial discharge quantity and power cable insulation situation are closely related, and the variation of partial discharge quantity is indicating that cable insulation exists the defect that may jeopardize cable running safety.Therefore, research to cable insulation defect detection method for local discharge just seems particularly urgent, cable insulation hidden danger detected in time, exactly, just can take in time necessary counter-measure, the economic loss that minimizing burst accident etc. brings is of great practical significance.
The utility model content
For addressing the above problem, the purpose of this utility model is to provide a kind of cable oscillation wave partial discharge position detecting system, adopts pulse reflection method to locate fast cable local discharge.
The technical scheme that the invention for solving the technical problem adopts is:
A kind of cable oscillation wave partial discharge position detecting system, comprise the high direct voltage device, the IGBT high-voltage switch gear, resonant inductance, voltage divider, coupling unit is put in office, wave filter, the data analysis collecting unit, described data analysis collecting unit respectively with the high direct voltage device, the IGBT high-voltage switch gear is connected, the output terminal of described high direct voltage device connects respectively the IGBT high-voltage switch gear, resonant inductance, described resonant inductance connects respectively tested cable, voltage divider, described voltage divider is put coupling unit through office, wave filter is connected with the data analysis collecting unit, described data analysis collecting unit also is provided with the communication interface to external equipment for output test data.When tested cable has a power failure, by the high direct voltage device, cable was charged in several seconds to predeterminated voltage, closed IGBT high-voltage switch gear, form series resonant tank by tested cable and resonant inductance afterwards, produces the needed damped oscillation voltage of test on tested cable.By voltage divider, the wave of oscillation returned is received, and by office put coupling unit, the data analysis collecting unit is processed and transferred to wave filter to the wave of oscillation returned, the data analysis collecting unit calculates detecting data, analyze obtain cable office high-volume, office puts intensity and position.
Further, the two ends of described tested cable also are provided with corona-proofing device, therefore can get rid of the interference of tested cable corona discharge, can greatly improve the accuracy of test.
Further, described data analysis collecting unit is connected with the indicative control unit for the display data analysis interface.
Further, the data analysis collecting unit is connected with wireless communication unit, system can be communicated with wireless network by wireless communication unit, the mode of the detection the data wireless transmission of gained is transferred to the higher level main website and do further analysis and research, the office under assessment cable running status puts characteristic and diagnoses potential office to put fault.
The beneficial effects of the utility model are: a kind of cable oscillation wave partial discharge position detecting system that the utility model adopts, utilize damped oscillation voltage as trial voltage, to tested cable applied voltage test image data step by step, the office that obtains cable through data analysis high-volume, office puts intensity and position, and the office under assessment cable running status puts characteristic and diagnoses potential office to put fault.The utility model is simple and practical, testing result is accurate, and very convenient on-the-spot the use, is adapted at widespread use in cable status testing from now on.
The accompanying drawing explanation
Below in conjunction with accompanying drawing and example, the utility model is described in further detail.
Fig. 1 is structural representation of the present utility model;
Fig. 2 is principle schematic of the present utility model.
Embodiment
With reference to Fig. 1, a kind of cable oscillation wave partial discharge position detecting system, comprise high direct voltage device 1, IGBT high-voltage switch gear 2, resonant inductance 3, voltage divider 5, coupling unit 6 is put in office, wave filter 7, data analysis collecting unit 8, described data analysis collecting unit 8 respectively with high direct voltage device 1, IGBT high-voltage switch gear 2 is connected, the output terminal of described high direct voltage device 1 connects respectively IGBT high-voltage switch gear 2, resonant inductance 3, described resonant inductance 3 connects respectively tested cable 4, voltage divider 5, described voltage divider 5 is put coupling unit 6 through office, wave filter 7 is connected with data analysis collecting unit 8, described data analysis collecting unit 8 also is provided with the communication interface 9 to external equipment for output test data.When tested cable 4 has a power failure, by high direct voltage device 1, tested cable 4 was charged to predeterminated voltage in several seconds, closed IGBT high-voltage switch gear 2, form series resonant tank by tested cable 4 and resonant inductance 3 afterwards, produces the needed damped oscillation voltage of test on tested cable 4.By 5 pairs of waves of oscillation that return of voltage divider, received, and by office put coupling unit 6, data analysis collecting unit 8 is processed and transferred to 7 pairs of waves of oscillation that return of wave filter, 8 pairs of data analysis collecting units detect data calculate, analyze obtain tested cable 4 office high-volume, office puts intensity and position.
Native system adopts pulse reflection method to carry out the shelf depreciation location, the principle signal as shown in Figure 2, is tested the cable 4 that a length is l, supposes to occur at distance test lead x place shelf depreciation, pulse edge cable 4 is propagated to two reverse directions, and one of them pulse elapsed time tl arrives test lead; Another pulse is propagated to the test opposite end, at cable 4 ends, reflects, and to test lead, propagates afterwards again, and elapsed time t2 arrives test lead.Arrive the mistiming t of test lead according to two pulses, can calculate the shelf depreciation occurrence positions,
（2）
In formula, v is velocity of wave in cable 4.
Further, the two ends of described tested cable 4 also are provided with corona-proofing device 12, therefore can get rid of the interference of tested cable 4 corona discharges, can greatly improve the accuracy of test.
Further, described data analysis collecting unit 8 is connected with the indicative control unit 11 for the display data analysis interface.
Further, data analysis collecting unit 8 is connected with wireless communication unit 10, system can be communicated with wireless network by wireless communication unit 10, the mode of the detection the data wireless transmission of gained is transferred to the higher level main website and do further analysis and research, the office assessed under tested cable 4 running statuses puts characteristic and diagnoses potential office to put fault.
The above, be 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 (4)
1. a cable oscillation wave partial discharge position detecting system, it is characterized in that: comprise high direct voltage device (1), IGBT high-voltage switch gear (2), resonant inductance (3), voltage divider (5), coupling unit (6) is put in office, wave filter (7), data analysis collecting unit (8), described data analysis collecting unit (8) respectively with high direct voltage device (1), IGBT high-voltage switch gear (2) is connected, the output terminal of described high direct voltage device (1) connects respectively IGBT high-voltage switch gear (2), resonant inductance (3), described resonant inductance (3) connects respectively tested cable (4), voltage divider (5), described voltage divider (5) is put coupling unit (6) through office, wave filter (7) is connected with data analysis collecting unit (8), described data analysis collecting unit (8) also is provided with the communication interface (9) to external equipment for output test data.
2. a kind of cable oscillation wave partial discharge position detecting system according to claim 1, it is characterized in that: the two ends of described tested cable (4) also are provided with corona-proofing device (12).
3. a kind of cable oscillation wave partial discharge position detecting system according to claim 1, it is characterized in that: described data analysis collecting unit (8) is connected with the indicative control unit (11) for the display data analysis interface.
4. according to the described a kind of cable oscillation wave partial discharge position detecting system of claim 1 or 3, it is characterized in that: data analysis collecting unit (8) is connected with wireless communication unit (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320507625 CN203365619U (en) | 2013-08-19 | 2013-08-19 | System for detecting and positioning partial discharge of cable oscillation waves |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320507625 CN203365619U (en) | 2013-08-19 | 2013-08-19 | System for detecting and positioning partial discharge of cable oscillation waves |
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| CN203365619U true CN203365619U (en) | 2013-12-25 |
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| CN 201320507625 Expired - Fee Related CN203365619U (en) | 2013-08-19 | 2013-08-19 | System for detecting and positioning partial discharge of cable oscillation waves |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103852697A (en) * | 2014-02-20 | 2014-06-11 | 广州供电局有限公司 | Cable partial discharge detection device |
| CN104714155A (en) * | 2015-02-02 | 2015-06-17 | 西安交通大学 | Detection and evaluation device and method for partial discharge of direct current XLPE cables |
| CN104808121A (en) * | 2015-04-13 | 2015-07-29 | 国家电网公司 | Distributing cable partial discharge test method based on oscillatory wave test |
| CN104965160A (en) * | 2015-05-29 | 2015-10-07 | 广西电网有限责任公司电力科学研究院 | Cable partial discharge detection method and detection apparatus |
| CN105388401A (en) * | 2015-10-26 | 2016-03-09 | 云南电网有限责任公司电力科学研究院 | Novel cable oscillation wave partial discharge detection system |
| CN107797039A (en) * | 2017-10-24 | 2018-03-13 | 杭州盛能电力科技有限公司 | A kind of high-tension cable wave of oscillation partial discharge testing system |
| CN107942208A (en) * | 2017-10-24 | 2018-04-20 | 杭州盛能电力科技有限公司 | A kind of cable insulation comprehensive diagnos tests system |
| 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 |
| CN112578247A (en) * | 2020-12-18 | 2021-03-30 | 广东电网有限责任公司中山供电局 | Cable oscillatory wave partial discharge measurement system |
| CN113030661A (en) * | 2021-03-08 | 2021-06-25 | 深圳供电局有限公司 | Cable buffer layer defect detection equipment and method |
| CN114646848A (en) * | 2022-03-23 | 2022-06-21 | 淮北工科检测检验有限公司 | Testing method of high-voltage cable oscillation wave partial discharge testing machine |
-
2013
- 2013-08-19 CN CN 201320507625 patent/CN203365619U/en not_active Expired - Fee Related
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103852697A (en) * | 2014-02-20 | 2014-06-11 | 广州供电局有限公司 | Cable partial discharge detection device |
| CN103852697B (en) * | 2014-02-20 | 2015-05-13 | 广州供电局有限公司 | Cable partial discharge detection device |
| CN104714155A (en) * | 2015-02-02 | 2015-06-17 | 西安交通大学 | Detection and evaluation device and method for partial discharge of direct current XLPE cables |
| CN104714155B (en) * | 2015-02-02 | 2017-12-15 | 西安交通大学 | A kind of detection to direct current XLPE cable shelf depreciation and apparatus for evaluating and method |
| CN104808121A (en) * | 2015-04-13 | 2015-07-29 | 国家电网公司 | Distributing cable partial discharge test method based on oscillatory wave test |
| CN104965160A (en) * | 2015-05-29 | 2015-10-07 | 广西电网有限责任公司电力科学研究院 | Cable partial discharge detection method and detection apparatus |
| CN104965160B (en) * | 2015-05-29 | 2018-01-23 | 广西电网有限责任公司电力科学研究院 | A kind of cable local discharge detection method and detection means |
| CN105388401A (en) * | 2015-10-26 | 2016-03-09 | 云南电网有限责任公司电力科学研究院 | Novel cable oscillation wave partial discharge detection system |
| CN107797039A (en) * | 2017-10-24 | 2018-03-13 | 杭州盛能电力科技有限公司 | A kind of high-tension cable wave of oscillation partial discharge testing system |
| CN107942208A (en) * | 2017-10-24 | 2018-04-20 | 杭州盛能电力科技有限公司 | A kind of cable insulation comprehensive diagnos tests system |
| CN107797039B (en) * | 2017-10-24 | 2023-05-09 | 杭州盛能电力科技有限公司 | High-voltage cable oscillating wave partial discharge test system |
| 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 |
| CN112578247A (en) * | 2020-12-18 | 2021-03-30 | 广东电网有限责任公司中山供电局 | Cable oscillatory wave partial discharge measurement system |
| CN113030661A (en) * | 2021-03-08 | 2021-06-25 | 深圳供电局有限公司 | Cable buffer layer defect detection equipment and method |
| CN113030661B (en) * | 2021-03-08 | 2024-01-19 | 深圳供电局有限公司 | Cable buffer layer defect detection device and method |
| CN114646848A (en) * | 2022-03-23 | 2022-06-21 | 淮北工科检测检验有限公司 | Testing method of high-voltage cable oscillation wave partial discharge testing machine |
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| 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: 20131225 Termination date: 20150819 |
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| EXPY | Termination of patent right or utility model |