CN202614857U - Integrated online detection device of cable - Google Patents
Integrated online detection device of cable Download PDFInfo
- Publication number
- CN202614857U CN202614857U CN 201220113492 CN201220113492U CN202614857U CN 202614857 U CN202614857 U CN 202614857U CN 201220113492 CN201220113492 CN 201220113492 CN 201220113492 U CN201220113492 U CN 201220113492U CN 202614857 U CN202614857 U CN 202614857U
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- overlapping
- determination unit
- cable
- detecting unit
- direct current
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- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The utility model relates to an integrated online detection device of a cable. The integrated online detection device of the cable is connected with the to-be-detected cable. The integrated online detection device of the cable includes a high-voltage power distribution line, a current transformer, a three-phase switching device, a DC overlapping electric reactor, a tan Delta detecting unit, a DC component detecting unit, a DC overlapping detecting unit, an overlapping voltage additional power source and a computer. The high-voltage power distribution line is connected to two ends of the to-be-detected cable. The high-voltage power distribution line is connected with the tan Delta detecting unit and the DC overlapping electric reactor respectively. The to-be-detected cable is connected with the current transformer, the DC component detecting unit and the DC overlapping detecting unit respectively through the three-phase switching device. The current transformer is connected with the tan Delta detecting unit. The tan Delta detecting unit, the DC component detecting unit, the DC overlapping detecting unit and the overlapping voltage additional power source are connected with the computer respectively. Compared with the prior art, the integrated online detection device of the cable provided by the utility model has advantages of high measurement precision, strong anti-interference capacity and the like.
Description
Technical field
The utility model relates to a kind of measurement mechanism of power domain, especially relates to a kind of integrated cable on-line measuring device.
Background technology
Continuous development along with electric utility; The quantity of power cable sharply increases, and power cable puts the back into operation because circumstance complication of living in is difficult in maintenance; Receive environmental change factor affecting such as electricity, heat, machinery and be prone to take place the insulation ag(e)ing damage, be difficult to detect in case hidden danger occurs.Power cable then probably develops into single-phase earthing even phase fault because insulation ag(e)ing or other reasons cause discharge over the ground, influences system's normal power supply.Traditional way is regularly to do preventive trial, but this way exists: 1, because the difference of preventive trial and actual motion condition can not detect the actual hidden danger of cable faithfully; 2, test period length can not in time scent a hidden danger and insulation ag(e)ing trend, causes accident to take place; 3, offline inspection needs the equipment shortcomings such as power supply continuity that influence out of service.
Recently, the on-line monitoring method has obtained certain popularization, and the on-line monitoring method makes the operations staff under the state that does not have a power failure, can grasp the real-time information of cable operation at any time; Help to judge whether cable insulation descends, and whether needs repairing, thereby have the minimizing power off time; The infringement that minimizing equipment causes because of maintenance and keep in repair the improper accident that causes; Reduce human and material resources, financial resources that maintenance needs, the advantage of minimizing operator on duty and human accident, the time at present to the development trend of power equipment insulating monitoring.
Proposed both at home and abroad such as loss factor method, shelf depreciation method, dielectric loss detection method etc., these methods are feasible in theory, but also have some technical defectives.For example the shelf depreciation method be can't solve the interference of electric system the time well, and the means of grade estimation and be confined to shield better laboratory and carry out before can only dispatching from the factory as cable product can't be used for on-the-spot the detection.
The utility model content
The purpose of the utility model is exactly for the defective that overcomes above-mentioned prior art existence the integrated cable on-line measuring device that a kind of measuring accuracy is high, antijamming capability is strong to be provided.
The purpose of the utility model can realize through following technical scheme:
A kind of integrated cable on-line measuring device; This device is connected with cable under test; It is characterized in that; Described pick-up unit comprises that high-tension distributing line, current transformer, three-phase switching device shifter, direct current are overlapping with reactor, tan δ determination unit, flip-flop determination unit, the overlapping determination unit of direct current, overlapping voltage additional power source and computing machine; Described high-tension distributing line is connected on the cable under test two ends; Described high-tension distributing line respectively with tan δ determination unit, direct current is overlapping is connected with reactor, described cable under test is connected with current transformer, flip-flop determination unit, the overlapping determination unit of direct current respectively through the three-phase switching device shifter, described current transformer is connected with tan δ determination unit; Described tan δ determination unit, flip-flop determination unit, the overlapping determination unit of direct current, overlapping voltage additional power source are connected with computing machine respectively, and described overlapping voltage additional power source is connected with reactor with direct current is overlapping.
Described high-tension distributing line is connected with tan δ determination unit through voltage divider.
Also comprise earthed voltage transformer, this earthed voltage transformer connects high-tension distributing line.
Described three-phase switching device shifter is connected with high-tension distributing line through fuse.
Also comprise printer, this printer is connected with computing machine.
Compared with prior art, the utlity model has measuring accuracy height, advantage that antijamming capability is strong.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Among the figure: 1-high-tension distributing line, 2-earthed voltage transformer, the overlapping reactor of using of 3-direct current, 4-current transformer; 5-tan δ determination unit, 6-flip-flop determination unit, the overlapping determination unit of 7-direct current; The overlapping voltage additional power source of 8-, 9-computing machine, 10-printer; The 11-voltage divider, 12-cable under test, 13-three-phase switching device shifter.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the utility model is elaborated.
Embodiment
As shown in Figure 1; A kind of integrated cable on-line measuring device; This device is connected with cable under test 12; Described pick-up unit comprises that high-tension distributing line 1, current transformer, three-phase switching device shifter 13, direct current are overlapping with the overlapping determination unit of reactor 3, tan δ determination unit 5, flip-flop determination unit 6, direct current 7, overlapping voltage additional power source 8 and computing machine 9; Described high-tension distributing line 1 is connected on cable under test 12 two ends; Described high-tension distributing line 1 respectively with tan δ determination unit 5, direct current is overlapping is connected with reactor 3, described cable under test 12 is connected with current transformer, flip-flop determination unit 6, the overlapping determination unit 7 of direct current respectively through three-phase switching device shifter 13, described current transformer is connected with tan δ determination unit 5; The overlapping determination unit of described tan δ determination unit 5, flip-flop determination unit 6, direct current 7, overlapping voltage additional power source 8 are connected with computing machine 9 respectively, and described overlapping voltage additional power source 8 is connected with reactor 3 with direct current is overlapping.
Described high-tension distributing line 1 is connected with tan δ determination unit 5 through voltage divider 11.Described three-phase switching device shifter 13 is connected with high-tension distributing line 1 through fuse 4.
This pick-up unit also comprises earthed voltage transformer 2 and printer 10, and earthed voltage transformer 2 connects high-tension distributing line 1, and printer 10 is connected with computing machine 9.
Claims (5)
1. integrated cable on-line measuring device; This device is connected with cable under test; It is characterized in that; Described pick-up unit comprises that high-tension distributing line, current transformer, three-phase switching device shifter, direct current are overlapping with reactor, tan δ determination unit, flip-flop determination unit, the overlapping determination unit of direct current, overlapping voltage additional power source and computing machine; Described high-tension distributing line is connected on the cable under test two ends; Described high-tension distributing line respectively with tan δ determination unit, direct current is overlapping is connected with reactor, described cable under test is connected with current transformer, flip-flop determination unit, the overlapping determination unit of direct current respectively through the three-phase switching device shifter, described current transformer is connected with tan δ determination unit; Described tan δ determination unit, flip-flop determination unit, the overlapping determination unit of direct current, overlapping voltage additional power source are connected with computing machine respectively, and described overlapping voltage additional power source is connected with reactor with direct current is overlapping.
2. a kind of integrated cable on-line measuring device according to claim 1 is characterized in that, described high-tension distributing line is connected with tan δ determination unit through voltage divider.
3. a kind of integrated cable on-line measuring device according to claim 1 is characterized in that, also comprises earthed voltage transformer, and this earthed voltage transformer connects high-tension distributing line.
4. a kind of integrated cable on-line measuring device according to claim 1 is characterized in that, described three-phase switching device shifter is connected with high-tension distributing line through fuse.
5. a kind of integrated cable on-line measuring device according to claim 1 is characterized in that also comprise printer, this printer is connected with computing machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220113492 CN202614857U (en) | 2012-03-22 | 2012-03-22 | Integrated online detection device of cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220113492 CN202614857U (en) | 2012-03-22 | 2012-03-22 | Integrated online detection device of cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202614857U true CN202614857U (en) | 2012-12-19 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220113492 Expired - Lifetime CN202614857U (en) | 2012-03-22 | 2012-03-22 | Integrated online detection device of cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202614857U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104597355A (en) * | 2015-01-28 | 2015-05-06 | 国家电网公司 | Wire parameter measurement instrument and measurement method |
-
2012
- 2012-03-22 CN CN 201220113492 patent/CN202614857U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104597355A (en) * | 2015-01-28 | 2015-05-06 | 国家电网公司 | Wire parameter measurement instrument and measurement method |
| CN104597355B (en) * | 2015-01-28 | 2018-04-17 | 国家电网公司 | A kind of conducting wire measurement method of parameters based on conducting wire parameter measurement instrument |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121219 |
|
| CX01 | Expiry of patent term |