CN103323700B - A kind of high-temperature superconductive cable exchanges resistance test system and test method thereof - Google Patents
A kind of high-temperature superconductive cable exchanges resistance test system and test method thereof Download PDFInfo
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- CN103323700B CN103323700B CN201310198990.XA CN201310198990A CN103323700B CN 103323700 B CN103323700 B CN 103323700B CN 201310198990 A CN201310198990 A CN 201310198990A CN 103323700 B CN103323700 B CN 103323700B
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- 238000012360 testing method Methods 0.000 title claims abstract description 23
- 238000010998 test method Methods 0.000 title claims abstract description 10
- 238000005057 refrigeration Methods 0.000 claims description 18
- 230000008878 coupling Effects 0.000 claims description 17
- 238000010168 coupling process Methods 0.000 claims description 17
- 238000005859 coupling reaction Methods 0.000 claims description 17
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 239000010949 copper Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 238000004080 punching Methods 0.000 claims description 4
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 2
- 230000006698 induction Effects 0.000 abstract description 2
- 238000004382 potting Methods 0.000 abstract description 2
- 230000005540 biological transmission Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 239000002887 superconductor Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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Abstract
The present invention relates to high-potting system and the test method thereof of high-temperature superconductive cable, be specifically related to a kind of high-temperature superconductive cable and exchange resistance test system and test method thereof.The present invention joins end to end conventional electrical power cable and tested high-temperature superconductive cable and forms closed-loop path, adopt transformer as the voltage-to-ground of voltage source lifting hyperconductive cable core, utilize mutual inductance principle via conventional electrical power cable section by current lifting device as current source, in whole closed-loop path, induction produces big current, consider that cable is large capacitive load, therefore be also provided with compensation reactor with the capacity current in balanced loop, under the light condition that voltage source is operated in far below specified output, add the front end quantity of reasonable disposition current lifting device, thus ensure the long-play of a whole set of pilot system, carry out the test that the long-time high-voltage great-current of high-temperature superconductive cable exchanges tolerance.Whole system structure is simple, is easier to realize, cost-saving.
Description
Technical field
The present invention relates to high-potting system and the test method thereof of high-temperature superconductive cable, be specifically related to a kind of high-temperature superconductive cable and exchange resistance test system and test method thereof.
Background technology
High-temperature superconductive cable technology of transmission of electricity, as a kind of New Technologies of Electric Power Transmission, has the remarkable advantages such as transmission capacity is large, loss is low, occupation of land space is little, energy-conserving and environment-protective, one of important development direction having become 21 century power transmission technology.In recent years, increasingly mature along with superconductor applications research, high-temperature superconductive cable technology of transmission of electricity just progressively enters the engineer applied stage.Resistance test is one of important pilot project of high-tension apparatus, the interchange resistance test of high-temperature superconductive cable typically uses the AC voltage withstand test system of conventional electrical power cable, namely adopt frequency modulation series resonant tester as voltage source, carry out the core AC voltage withstand test over the ground of 60min.But consider that high-temperature superconductive cable is compared with conventional electrical power cable, there is more complicated body construction and stronger current capacity, the AC voltage withstand test system of conventional electrical power cable can only carry out the cable core withstand voltage test over the ground of short period, is difficult to the testing requirement meeting high-temperature superconductive cable runnability.
Summary of the invention
For the deficiencies in the prior art, the object of this invention is to provide a kind of high-temperature superconductive cable and exchange resistance test system, another object is to provide high-temperature superconductive cable and exchanges resistance test method, and the present invention ensures that a whole set of pilot system can carry out the test that the long-time high-voltage great-current of high-temperature superconductive cable exchanges tolerance.
The object of the invention is to adopt following technical proposals to realize:
The invention provides a kind of high-temperature superconductive cable and exchange resistance test system, its improvements are, described system comprises transformer, current lifting device, power cable, high-temperature superconductive cable, compensation reactor and refrigeration system;
Described power cable two ends adopt that being flexible coupling joins end to end forms closed-loop path respectively with high-temperature superconductive cable two ends, at place's access transformer that is flexible coupling of side, be flexible coupling place by the screen layer of high-temperature superconductive cable single-end earthed at opposite side; Described current lifting device is connected across the power cable section of described closed-loop path by the current lifting device front end of at least two;
Between described compensation reactor access transformer output terminal and earth potential; Described refrigeration system two ends connect the two ends of high-temperature superconductive cable respectively.
Wherein, described transformer serves as voltage source, runs by coordinating with the current lifting device serving as current source, applies high pressure and big current (high pressure and big current are respectively rated voltage and the rated current of high-temperature superconductive cable) to high-temperature superconductive cable simultaneously; Described compensation reactor is used for the capacity current in balance closure loop.
Wherein, described power cable is composed in parallel by conventional electrical power cable; Described power cable two ends are connected to form closed-loop path respectively by the two ends of hts power cable termination and high-temperature superconductive cable; Described power cable is identical with the electric pressure of high-temperature superconductive cable.
Wherein, be flexible coupling described in and adopt copper material to be flexible coupling.
Wherein, tinfoil paper is adopted to carry out electromagnetic screen to the described place that is flexible coupling.
Wherein, described current lifting device front end is punching transformer; Described current lifting device ground connection.
Wherein, described refrigeration system comprises the liquid nitrogen container, refrigeration machine and the ebullator that connect successively; Described refrigeration system is used for the temperature of high-temperature superconductive cable to remain between absolute temperature 65K-77K.
A kind of high-temperature superconductive cable that the present invention is based on another object provides exchanges the test method of resistance test system, and its improvements are, described method comprises the steps:
A, power cable and tested high-temperature superconductive cable being joined end to end forms closed-loop path, adopts transformer as the voltage-to-ground of voltage source lifting high-temperature superconductive cable core, makes transformer, under operating in rated voltage; Current lifting device front end is connected across power cable section, adopts current lifting device to utilize mutual inductance principle to produce big current to described closed-loop path as current source;
B, compensation reactor is accessed between transformer output terminal and earth potential, the capacity current in balance closure loop.
Wherein, under the light duty that described transformer and current lifting device are operated in lower than high-temperature superconductive cable rated condition.
Compared with the prior art, the beneficial effect that the present invention reaches is:
1, the present invention can apply high voltage and big current to tested high-temperature superconductive cable simultaneously:
Transformer and current lifting device coordinate operation, and provide high voltage and big current to tested high-temperature superconductive cable core respectively, both are independent of each other, and can need trial voltage and electric current independent regulation according to test.
2, can reliability service for a long time:
Pilot system of the present invention is configured with compensation reactor, and employ multiple stage current lifting device front end, transformer and current lifting device are all under operating in the light duty far below rated condition, and a whole set of pilot system can reliability service for a long time, meets the testing requirement of high-temperature superconductive cable runnability.
3, system architecture is simply easily built, cost-saving:
Device involved in the present invention is conventional common apparatus, and without the need to customization, and whole system structure is simple, is easier to realize, cost-saving.
Accompanying drawing explanation
Fig. 1 is that high-temperature superconductive cable provided by the invention exchanges resistance test system construction drawing, wherein: 1-transformer, and 2-compensation reactor, 3-high-temperature superconductive cable, 4-conventional electrical power cable, 5-current lifting device, 6-refrigeration system, 7-hts power cable termination, 8-current lifting device front end, 9-copper material is flexible coupling.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
High-temperature superconductive cable provided by the invention exchanges resistance test system construction drawing as shown in Figure 1, comprises transformer 1, current lifting device 5, conventional electrical power cable 4, high-temperature superconductive cable 3, compensation reactor 2 and refrigeration system 6, connect the supporting refrigeration system 6 of tested high-temperature superconductive cable 3, according to current-carrying capacity and the bending radius of high-temperature superconductive cable 3, the conventional electrical power cable 4 choosing some electric pressures identical with tested high-temperature superconductive cable carries out parallel connection, then by tested high-temperature superconductive cable 3 through the conventional electrical power cable 4 of hts power cable termination 7 after in parallel adopt copper material be flexible coupling 9 head and the tail be connected, and with tinfoil paper, electromagnetic screen is carried out to junction, to be flexible coupling 9 on-positions reserving transformer at the copper material of side simultaneously, and be flexible coupling 9 by the screen layer of high-temperature superconductive cable 3 single-end earthed at opposite side copper material.
Compensation reactor 2 accesses between transformer 1 output terminal and earth potential; Current lifting device front end 8 is punching transformer; Described current lifting device 5 ground connection.Refrigeration system 6 two ends connect the two ends of high-temperature superconductive cable respectively, and refrigeration system comprises the liquid nitrogen container, refrigeration machine and the ebullator that connect successively; Refrigeration system is used for the temperature of high-temperature superconductive cable to remain between absolute temperature 65K-77K.
High-temperature superconductive cable 3 is made up of cable core, low-temperature (low temperature) vessel, terminal and cooling system four parts.Wherein cable core is the core of high-temperature superconductive cable, comprises the critical pieces such as casing play, conductor layer, insulation course and screen layer.
The present invention also provides a kind of high-temperature superconductive cable to exchange resistance test method, comprising:
A, by transformer 1 through being flexible coupling the voltage-to-ground of 9 access loops, place, lifting closed-loop path high-temperature superconductive cable 3 core, under making it operate in rated voltage; By the multiple stage front end 8(of current lifting device 5 and punching transformer), being connected across the conventional electrical power cable 4 sections of closed-loop path, utilizing mutual inductance principle generation current in the loop, by regulating, making the electric current in loop reach the rated current-carrying capacity of tested high-temperature superconductive cable 3;
B, be linked between transformer 1 output terminal and earth potential by compensation reactor 2, with the capacity current in balanced loop, the design parameter of compensation reactor 2 is determined according to the estimated value of closed-loop path total capacitance; Access supporting refrigeration system 6.
Because high-temperature superconductive cable has good magnet shielding structure, in it, external magnetic field is thus completely shielded, this pilot system joins end to end conventional electrical power cable and tested high-temperature superconductive cable and forms closed-loop path, adopt transformer as the voltage-to-ground of voltage source lifting hyperconductive cable core, utilize mutual inductance principle via conventional electrical power cable section by current lifting device as current source, in whole closed-loop path, induction produces big current (rated current of high-temperature superconductor Electricity Federation), consider that cable is large capacitive load, therefore be also provided with compensation reactor 2 with the capacity current in balanced loop, under the light condition that voltage source is operated in far below specified output, add reasonable disposition current lifting device front end 8 quantity, thus ensure the long-play of a whole set of pilot system, carry out the test that the long-time high-voltage great-current of high-temperature superconductive cable exchanges tolerance.
Finally should be noted that: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit, although with reference to above-described embodiment to invention has been detailed description, those of ordinary skill in the field are to be understood that: still can modify to the specific embodiment of the present invention or equivalent replacement, and not departing from any amendment of spirit and scope of the invention or equivalent replacement, it all should be encompassed in the middle of right of the present invention.
Claims (2)
1. high-temperature superconductive cable exchanges a resistance test system, and it is characterized in that, described system comprises transformer, current lifting device, power cable, high-temperature superconductive cable, compensation reactor and refrigeration system;
Described power cable two ends adopt that being flexible coupling joins end to end forms closed-loop path respectively with high-temperature superconductive cable two ends, at place's access transformer that is flexible coupling of side, be flexible coupling place by the screen layer of high-temperature superconductive cable single-end earthed at opposite side; Described current lifting device is connected across the power cable section of described closed-loop path by the current lifting device front end of at least two;
Between described compensation reactor access transformer output terminal and earth potential; Described refrigeration system two ends connect the two ends of high-temperature superconductive cable respectively;
Described transformer serves as voltage source, running, applying high pressure and big current to high-temperature superconductive cable simultaneously by coordinating with the current lifting device serving as current source; Described compensation reactor is used for the capacity current in balance closure loop;
Described power cable is composed in parallel by conventional electrical power cable; Described power cable two ends are connected to form closed-loop path respectively by the two ends of hts power cable termination and high-temperature superconductive cable; Described power cable is identical with the electric pressure of high-temperature superconductive cable;
The described employing copper material that is flexible coupling is flexible coupling;
Tinfoil paper is adopted to carry out electromagnetic screen to the described place that is flexible coupling;
Described current lifting device front end is punching transformer; Described current lifting device ground connection;
Described refrigeration system comprises the liquid nitrogen container, refrigeration machine and the ebullator that connect successively; Described refrigeration system is used for the temperature of high-temperature superconductive cable to remain between absolute temperature 65K-77K.
2. high-temperature superconductive cable exchanges a test method for resistance test system, and it is characterized in that, described method comprises the steps:
A, power cable and tested high-temperature superconductive cable being joined end to end forms closed-loop path, adopts transformer as the voltage-to-ground of voltage source lifting high-temperature superconductive cable core, makes transformer, under operating in rated voltage; Current lifting device front end is connected across power cable section, adopts current lifting device to utilize mutual inductance principle to produce big current to described closed-loop path as current source;
B, compensation reactor is accessed between transformer output terminal and earth potential, the capacity current in balance closure loop;
Under described transformer and current lifting device are operated in the light duty lower than high-temperature superconductive cable rated condition.
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| CN201310198990.XA CN103323700B (en) | 2013-05-24 | 2013-05-24 | A kind of high-temperature superconductive cable exchanges resistance test system and test method thereof |
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| EP2978091B1 (en) * | 2014-07-22 | 2020-04-01 | Nexans | Method for the transmission of electric power |
| CN104375033A (en) * | 2014-11-13 | 2015-02-25 | 清华大学 | Device for testing long-term operation performance of direct current cable system under extra-high voltage strong current working condition |
| CN104535910B (en) * | 2015-01-12 | 2017-08-25 | 国网上海市电力公司 | A kind of integral type terminal installation for power cable breakdown test step by step |
| CN104635125A (en) * | 2015-01-22 | 2015-05-20 | 国家电网公司 | Superconduction current lead voltage withstanding test system |
| CN105044573B (en) * | 2015-07-17 | 2017-11-14 | 中国科学院电工研究所 | The low temperature high voltage shelf depreciation experiment of high-temperature superconductor electric device and test device |
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| CN109164361B (en) * | 2018-09-21 | 2020-11-03 | 国网辽宁省电力有限公司沈阳供电公司 | Alternating current withstand voltage test device and method used under extreme conditions |
| CN113917275A (en) * | 2020-07-09 | 2022-01-11 | 广州华南星光电力科技有限责任公司 | Integrated small-size conductor current-carrying temperature rise test device |
| CN112485557B (en) * | 2020-11-03 | 2024-05-31 | 国网辽宁省电力有限公司电力科学研究院 | Current-carrying capacity and temperature monitoring device and method for three-phase coaxial high-temperature superconducting cable system |
| CN112698118B (en) * | 2020-11-03 | 2024-06-04 | 国网辽宁省电力有限公司电力科学研究院 | Three-phase coaxial high-temperature superconducting cable through-flow test system and temporary and steady-state test method |
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