CN104635125A - Superconduction current lead voltage withstanding test system - Google Patents
Superconduction current lead voltage withstanding test system Download PDFInfo
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- CN104635125A CN104635125A CN201510032870.1A CN201510032870A CN104635125A CN 104635125 A CN104635125 A CN 104635125A CN 201510032870 A CN201510032870 A CN 201510032870A CN 104635125 A CN104635125 A CN 104635125A
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- current lead
- superconductive current
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- shading ring
- dewar
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Abstract
The invention discloses a superconduction current lead voltage withstanding test system, which is used for testing the superconduction current lead voltage withstanding degree. A wrapping insulator is arranged at the outer peripheral body of a superconduction current lead in a sleeving way, an aluminum foil is arranged at the outer peripheral body of the wrapping insulator in a sleeving way, the test system comprises a test transformer, a Dewar, an upper shielding ring, a lower shielding ring and a protecting resistor, the low-voltage end of the test transformer is connected with a low-voltage power supply, the high-voltage end of the test transformer is sequentially connected in series with the protecting resistor, the upper shielding ring, the superconduction current lead and the lower shielding ring, the aluminum foil arranged at the outer peripheral body of the wrapping insulator in the sleeving way is grounded through a grounding wire, liquid nitrogen is contained in the Dewar, and the upper shielding ring, the superconduction current lead and the lower shielding ring are completely soaked into liquid nitrogen of the Dewar. The superconduction current lead voltage withstanding test system has the advantages that the structure is simple, the alternating current voltage withstanding test of the superconduction current lead in low-temperature environment can be simulated and tested, and whether the inside electric field distribution of the superconduction current lead conforms to the operation requirements or not can be effectively inspected.
Description
Technical field
The present invention relates to a kind of superconductive current lead withstand voltage test system.
Background technology
Superconductive current lead external insulation often adopts lapped insulation, under low temperature environment, to there is stress little for lapped insulation structure, lapped insulation Stability Analysis of Structures not easily deforms, if but manufacturing process does not pass a test, lapped insulation structure existing defects, easily shelf depreciation occurs in operation, shelf depreciation slowly develops and finally then causes superconductive current lead internal short circuit fault or broken string, causes the unplanned property of load to have a power failure.Therefore, run certain hour week after date, superconductive current lead need have a power failure and carry out AC voltage withstand test to check the insulating property of its lapped insulation.
Summary of the invention
The invention provides a kind of superconductive current lead withstand voltage test system, which overcome the lapped insulation structure existing defects described in background technology and cause, in operation, shelf depreciation occurs, and then cause short trouble or broken string, cause the shortcoming that the unplanned property of load has a power failure.
The technical solution adopted for the present invention to solve the technical problems is:
Superconductive current lead withstand voltage test system, for testing the withstand voltage degree of superconductive current lead, the described superconductive current lead outward whole body is set with lapped insulation, the outer whole body of described lapped insulation is set with aluminium foil, this pilot system comprises testing transformer, Dewar, upper shading ring, lower shading ring and protective resistance, the low pressure termination low-tension supply of described testing transformer, high-pressure side is connected in series described protective resistance successively, upper shading ring, superconductive current lead and lower shading ring, the described lapped insulation aluminium foil that the whole body is set with outward passes through a ground connection, liquid nitrogen is loaded with in described Dewar, described upper shading ring, superconductive current lead, lower shading ring immerses in the liquid nitrogen of described Dewar completely.
Among one embodiment: described upper shading ring is connected in series by screw thread with one end of superconductive current lead, described lower shading ring is connected in series by screw thread with the other end of superconductive current lead.
Among one embodiment: described protective resistance is water resistance.
Among one embodiment: described Rao Bao insulation is closely entwined for thin film epoxy layer layer.
Among one embodiment: described Dewar is one U-shaped mouthful of container containing and is made up of composite insulating material.
Among one embodiment: in described Dewar, the liquid height of liquid nitrogen accounts for 90% of axial length in Dewar.
Among one embodiment: described upper shading ring and all its outer whole body streamline Glabrous thorn identical with lower shading ring.
The technical program is compared with background technology, and its tool has the following advantages:
Test system architecture of the present invention is simple, can the AC voltage withstand test of superconductive current lead under simulation test low temperature environment, the situations such as evenly whether effective detection superconductive current lead lapped insulation be wound around, whether aluminium foil closely crimps with lapped insulation, whether aluminium foil outside surface is smooth, effectively whether the distribution of inspection superconductive current lead internal electric field meets service requirement.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described.
Fig. 1 depicts pilot system schematic diagram of the present invention.
Embodiment
Please refer to Fig. 1, superconductive current lead withstand voltage test system, for testing the withstand voltage degree of superconductive current lead 1, the outer whole body of this superconductive current lead 1 is set with lapped insulation 11, the outer whole body of this lapped insulation 11 is set with aluminium foil 12, this pilot system comprises testing transformer 2, Dewar 3, upper shading ring 4, lower shading ring 5 and protective resistance 6, the low pressure termination low-tension supply (220V alternating current) of this testing transformer, high-pressure side (220kV alternating current) is connected in series this protective resistance 6 successively, upper shading ring 4, superconductive current lead 1 and lower shading ring 5, the aluminium foil 12 of this lapped insulation 11 outer whole body suit is by ground wire 7 ground connection, liquid nitrogen 8 is loaded with in this Dewar 3, shading ring 4 on this, superconductive current lead 1, lower shielding 5 ring immerses in the liquid nitrogen of this Dewar 3 completely.
Shading ring 4 and all its outer whole body streamline Glabrous thorn identical with lower shielding 5 ring on this, on this, shading ring 4 and lower shielding 5 ring all have threaded hole, the two ends of this superconductive current lead 1 are respectively attacks threaded thread end, on this, shading ring 4 is connected in series by its threaded hole and thread end screw thread with one end of superconductive current lead 1, and this lower shading ring 5 is connected in series by its threaded hole and thread end screw thread with the other end of superconductive current lead 1.
In the present embodiment, this protective resistance 6 is water resistance, and when protective resistance 6 both sides institute making alive is less than its rated withstand voltage, protective resistance 6 is in short-circuit condition; When protective resistance 6 both sides institute making alive is greater than its specified pressurized voltage, protective resistance 6 is in open-circuit condition, and electric current cannot pass through protective resistance, testing transformer 2 high-pressure side and upper shielding 4 ring is kept apart, plays a protective role to tested superconductive current lead 1.
In the present embodiment, this lapped insulation 11 is closely entwined for thin film epoxy layer layer.This Dewar 3 is one U-shaped mouthful of container containing and is made up of composite insulating material.In this Dewar 3, the liquid height of liquid nitrogen 8 accounts for 90% of axial length in Dewar, and this liquid nitrogen 8 purity need reach more than 99%, and this liquid nitrogen 8 simulates low temperature environment when superconductive current lead 1 runs.
It is same as the prior art that the present invention does not state part.
The above, be only present pre-ferred embodiments, therefore can not limit scope of the invention process according to this, the equivalence change namely done according to the scope of the claims of the present invention and description with modify, all should still belong in scope that the present invention contains.
Claims (7)
1. superconductive current lead withstand voltage test system, for testing the withstand voltage degree of superconductive current lead, the described superconductive current lead outward whole body is set with lapped insulation, the outer whole body of described lapped insulation is set with aluminium foil, it is characterized in that: this pilot system comprises testing transformer, Dewar, upper shading ring, lower shading ring and protective resistance, the low pressure termination low-tension supply of described testing transformer, high-pressure side is connected in series described protective resistance successively, upper shading ring, superconductive current lead and lower shading ring, the described lapped insulation aluminium foil that the whole body is set with outward passes through a ground connection, liquid nitrogen is loaded with in described Dewar, described upper shading ring, superconductive current lead, lower shading ring immerses in the liquid nitrogen of described Dewar completely.
2. superconductive current lead withstand voltage test system according to claim 1, it is characterized in that: described upper shading ring is connected in series by screw thread with one end of superconductive current lead, described lower shading ring is connected in series by screw thread with the other end of superconductive current lead.
3. superconductive current lead withstand voltage test system according to claim 1, is characterized in that: described protective resistance is water resistance.
4. superconductive current lead withstand voltage test system according to claim 1, is characterized in that: described Rao Bao insulation is closely entwined for thin film epoxy layer layer.
5. superconductive current lead withstand voltage test system according to claim 1, is characterized in that: described Dewar is one U-shaped mouthful of container containing and is made up of composite insulating material.
6. superconductive current lead withstand voltage test system according to claim 1, is characterized in that: in described Dewar, the liquid height of liquid nitrogen accounts for 90% of axial length in Dewar.
7. superconductive current lead withstand voltage test system according to claim 1, is characterized in that: described upper shading ring and all its outer whole body streamline Glabrous thorn identical with lower shading ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510032870.1A CN104635125A (en) | 2015-01-22 | 2015-01-22 | Superconduction current lead voltage withstanding test system |
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| CN201510032870.1A CN104635125A (en) | 2015-01-22 | 2015-01-22 | Superconduction current lead voltage withstanding test system |
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| CN104635125A true CN104635125A (en) | 2015-05-20 |
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| CN201510032870.1A Pending CN104635125A (en) | 2015-01-22 | 2015-01-22 | Superconduction current lead voltage withstanding test system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105137303A (en) * | 2015-09-11 | 2015-12-09 | 云南电网有限责任公司电力科学研究院 | Insulating strength test platform for superconductive insulating materials under different elongations in liquid nitrogen environments and platform application method |
| CN105301461A (en) * | 2015-11-27 | 2016-02-03 | 云南电网有限责任公司电力科学研究院 | Test device for insulation performance of wrapped superconductor and test method thereof |
| CN107045098A (en) * | 2017-05-29 | 2017-08-15 | 西南交通大学 | The operating mode that colds and heat succeed each other is got off download cable terminal industrial frequency withstand voltage pilot system and method |
| CN112327110A (en) * | 2020-10-19 | 2021-02-05 | 中国科学院电工研究所 | Wide-temperature-area liquid medium environment test device based on refrigerator conduction cooling |
| CN112798893A (en) * | 2021-01-19 | 2021-05-14 | 中天集团上海超导技术有限公司 | Superconducting cable short sample test platform |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105137303A (en) * | 2015-09-11 | 2015-12-09 | 云南电网有限责任公司电力科学研究院 | Insulating strength test platform for superconductive insulating materials under different elongations in liquid nitrogen environments and platform application method |
| CN105301461A (en) * | 2015-11-27 | 2016-02-03 | 云南电网有限责任公司电力科学研究院 | Test device for insulation performance of wrapped superconductor and test method thereof |
| CN107045098A (en) * | 2017-05-29 | 2017-08-15 | 西南交通大学 | The operating mode that colds and heat succeed each other is got off download cable terminal industrial frequency withstand voltage pilot system and method |
| CN107045098B (en) * | 2017-05-29 | 2019-05-31 | 西南交通大学 | Hot and cold alternation operating condition is got off download cable terminal industrial frequency withstand voltage pilot system and method |
| CN112327110A (en) * | 2020-10-19 | 2021-02-05 | 中国科学院电工研究所 | Wide-temperature-area liquid medium environment test device based on refrigerator conduction cooling |
| CN112798893A (en) * | 2021-01-19 | 2021-05-14 | 中天集团上海超导技术有限公司 | Superconducting cable short sample test platform |
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Application publication date: 20150520 |