CN202649386U - Alternating-current multi-circuit line corona characteristic test system - Google Patents
Alternating-current multi-circuit line corona characteristic test system Download PDFInfo
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- CN202649386U CN202649386U CN 201220177785 CN201220177785U CN202649386U CN 202649386 U CN202649386 U CN 202649386U CN 201220177785 CN201220177785 CN 201220177785 CN 201220177785 U CN201220177785 U CN 201220177785U CN 202649386 U CN202649386 U CN 202649386U
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- 238000012360 testing method Methods 0.000 title claims abstract description 87
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 239000012467 final product Substances 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract 1
- 241001354243 Corona Species 0.000 description 28
- 230000005540 biological transmission Effects 0.000 description 12
- 238000011160 research Methods 0.000 description 10
- 239000012212 insulator Substances 0.000 description 6
- 238000010276 construction Methods 0.000 description 5
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 5
- 239000010931 gold Substances 0.000 description 5
- 229910052737 gold Inorganic materials 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 230000005611 electricity Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- 239000012211 strain insulator Substances 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 210000002445 nipple Anatomy 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052958 orpiment Inorganic materials 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
The utility model provides an alternating-current multi-circuit line corona characteristic test system. The system is composed of an upper side test line section, a lower side test line section, a set of power frequency testing transformers, an electric reactor and two voltage dividers. The system is characterized in that the power frequency testing transformers are connected with the end of the upper side test line section, and the electric reactor is connected with the end of the lower side test line section; in the process of the test, a voltage U1 is applied to the upper side test line section through the power frequency testing transformers, according to the resonance principle, when the inductance value Lx of the electric reactor is adjusted to make the inductance value Lx and the lower side test line section ground capacitance C2 close to the resonance point, the lower side test line section voltage U2 will be increased rapidly so as to realize the voltage application, and the voltage value of the U2 can be adjusted freely by adjusting the Lx to different values, so that different voltage test demands can be satisfied. The test system of the utility model has the following advantages: the corona characteristic test can be performed on two lines having different voltage classes at the same time, and the voltage rise can be realized on lines having different voltage classes by only needing a set of power frequency test power supplies.
Description
Technical field
The utility model relates to a kind of pilot system for exchanging the research of multi-circuit lines on the same tower corona characteristic, be system and the research platform that carries out circuit Charging system corona characteristic test under the multiple-loop coupling condition, belong to electric system power transmission and transformation device corona characteristic research field.
Background technology
Be the rapid growth of adaptation China economy and the needs of transmission line construction development, the removal expense of and day by day more and more difficult in view of the selection in circuit corridor, compress as much as possible power transmission line corridor and increase transmission capacity, just become very problems of concern of China's power industry, thereby feed back power technology with tower more and more paid attention to.Since the eighties in 20th century, China East China, In Guangdong Province since economic development to the rapid growth of electricity needs, simultaneously again because China coast area land resource in short supply only built single back transmission line without possible.The 500kV work transmission lines such as the orpiment in area, East China in 1988, Nan Yang, the 500kV work transmission lines such as nineteen ninety Guangdong Sha Zeng have successively just adopted the design on common-tower double-return road.Many the 500kV work transmission lines in the areas such as northeast, Zhejiang, Jiangsu, Shanxi have just adopted the design on common-tower double-return road in a large number subsequently.Set up with the tower multi-loop line and to meet the general requirement of building a resource-conserving society, be economically developed, the soil is expensive, the house congested area is saved the circuit corridor and the effective way of construction investment, raising transmission capacity, it will be the preferred option that the extra-high voltage grid engineering of planning construction solves transmission of electricity corridor, area in short supply, local soil problem that the same tower that contains the 1000kV extra high voltage line sets up technology of transmission of electricity for many times.
During the alternating current circuit wiring on the same tower, because the wire phase spacing dwindles, the circuit voltage coupling strengthens, and the more conventional single back line surface electric field intensity of conductive line surfaces field intensity is high.Thereby make with many times construction of line corona discharges of tower and corona loss situation more seriously, corona loss is also higher for the ratio of circuit overall loss.So for this technical matters, need to carry out the simulation test of Simulation Analysis and test line segment, and then propose rational wire arrangements mode, select economical conductor cross-section and division number.During conducting transmission line corona performance test research, need supporting have test line segment, power frequency supply, voltage measuring apparatus and corona measurement instrument, the measurement of the adjusting of realization voltage and corona discharge, corona loss, institute thinks and carries out the research work that research unit need set up the corona performance test system.
At present, domestic when carrying out the corona characteristic experimental study for a plurality of electric pressure circuits, usually employing is overlapped power frequency testing transformers more or high-grade cascade-connected transformer loop in series is opened, changing many bench teats into tests transformer and pressurizes respectively (as shown in Figure 1), the testing equipment that requires is many, workload is large, and the test period is longer, and the testing crew that needs is also more.Moreover generally only there is the high-grade Industrial Frequency Transformer of a cover most of high voltage laboratory at home, as according to conventional method, then can't carry out with the multiloop corona loss research of tower.
In view of this, be necessary to be provided for exchanging the pilot system of multi-circuit lines on the same tower corona characteristic research, to overcome defects.
Summary of the invention
The purpose of this utility model is: set up one and overlap corona characteristic test macro under the charging operation condition that can satisfy a complete set of circuit parts such as wire, gold utensil, insulator, this system only disposes a cover industrial frequency experiment power supply, can realize simultaneously two functions such as different electric pressure line corona losses, discharge inception voltage test and charged examination.
The technical solution of the utility model is: a kind of interchange multi-circuit lines on the same tower corona characteristic pilot system, by the upside test line segment, the downside test line segment, one cover power frequency testing transformer, a reactor and two voltage dividers form, it is characterized in that, described power frequency testing transformer links to each other with upside test line segment end, reactor links to each other with downside test line segment end, in the test, adopt described power frequency testing transformer to apply voltage U 1 to the upside test line segment, according to resonance principle, when regulating reactor inductance amount Lx, when making itself and downside test line segment ground capacitance C2 near tuning-points, downside test line segment voltage U 2 realizes pressurization with fast rise, and adjusting Lx is different value, get final product free adjustment U2 magnitude of voltage, satisfy different voltage test needs.
Aforesaid interchange multi-circuit lines on the same tower corona characteristic pilot system is characterized in that described upside test line segment and downside test line segment arrange that up and down described power frequency testing transformer is 1500kV, and described reactor is the 5000pF controllable impedance.
The beneficial effects of the utility model are: the advantage of this pilot system is: (1) can realize the characteristic test of two different electric pressure line coronas simultaneously; (2) only need a cover industrial frequency experiment power supply, can reach different electric pressure circuits and boost simultaneously; (3) the corona performance test under the circuit service condition and the charging operation that can be used for a complete set of circuit matching components such as wire, gold utensil, insulator are examined.
This pilot system adopts the single supply device to realize the simultaneously continuously adjusting pressurization of two return leads first, set up multi-circuit lines on the same tower corona characteristic research platform, can satisfy simultaneously suspension insulator, strain insulator, dangle/strain insulator and wire jumper gold utensil, and the test product corona characteristic such as wire test, significantly improved the hardware condition of China in this research field, for a large amount of construction of China's multi-circuit lines on the same tower provide the important technology support.
Description of drawings
Fig. 1 is the pilot system loop diagram that two bench teats of prior art are tested transformer.
Fig. 2 is the pilot system loop diagram of the separate unit testing transformer of the utility model embodiment.
Fig. 3 is the fitting arrangement of the interchange multi-circuit lines on the same tower corona characteristic pilot system of the utility model embodiment.
Embodiment
In order to understand better the present invention, further illustrate content of the present invention below in conjunction with embodiment, but content of the present invention not only is confined to the following examples.Those skilled in the art can make various changes or modifications the present invention, and these equivalent form of values are equally within the listed claims limited range of the application.
Label declaration in the accompanying drawing: 1-wire jumper installation point; 2-strain insulator, installation point; 3-suspension insulator, installation point; 4-wire mounting points.
This pilot system is comprised of two test line segments (upper and lower layout overall length 150m), a cover 1500kV power frequency testing transformer, a 5000pF reactor (controllable impedance) and two voltage dividers.In test, power frequency testing transformer is linked to each other with upside test line segment end, reactor links to each other with downside test line segment end.As shown in Figure 2, in the test, adopt transformer to apply voltage U to the upside test line segment
1, according to resonance principle, when regulating reactor inductance amount L
x, make itself and downside test line segment ground capacitance C
2During near tuning-points, downside test line segment voltage U
2With fast rise, realize pressurization.Regulate L
xBe different value, but free adjustment U
2Magnitude of voltage satisfies different voltage test needs.
As shown in Figure 3, gold utensils such as the upper and lower sides test line segment can free conducting wire, grading ring, damper, and multi-form insulator can be installed are realized the test of circuit parts corona discharge or charging operation examination when setting up with the tower multiloop.
Adopt the test method of interchange multi-circuit lines on the same tower corona characteristic pilot system of the present invention, may further comprise the steps:
(1) as shown in Figure 3, this pilot system comprises upper and lower two test line segments, a cover 1500kV power frequency testing transformer, a 5000pF reactor (controllable impedance) and two power frequency voltage dividers;
(2) as shown in Figure 3, according to corresponding mounting points, at first the test products such as insulator, gold utensil, wire are installed on the upper and lower sides test line segment, if an electric pressure is only arranged, can only be installed on high-pressure side, top line segment;
(3) transformer reaches predeterminated voltage U to the pressurization of upside test line segment
1, then regulate downside test line segment reactor inductance amount L
x, according to resonance principle, as reactor and downside test line segment ground capacitance C
2During near tuning-points, downside test line segment voltage U
2With fast rise, reach predeterminated voltage after, stop adjusting inductance L
x, begin test;
(4) after test product reaches predeterminated voltage on the upper and lower sides test line segment, can adopt corona scope observation test product corona discharge state.
The content that is not described in detail in this instructions belongs to the known prior art of this area professional and technical personnel.
Claims (2)
1. one kind exchanges multi-circuit lines on the same tower corona characteristic pilot system, by the upside test line segment, the downside test line segment, one cover power frequency testing transformer, a reactor and two voltage dividers form, it is characterized in that, described power frequency testing transformer links to each other with upside test line segment end, reactor links to each other with downside test line segment end, in the test, adopt described power frequency testing transformer to apply voltage U 1 to the upside test line segment, according to resonance principle, when regulating reactor inductance amount Lx, when making itself and downside test line segment ground capacitance C2 near tuning-points, downside test line segment voltage U 2 realizes pressurization with fast rise, and adjusting Lx is different value, get final product free adjustment U2 magnitude of voltage, satisfy different voltage test needs.
2. interchange multi-circuit lines on the same tower corona characteristic pilot system according to claim 1 is characterized in that described upside test line segment and downside test line segment arrange that up and down described power frequency testing transformer is 1500kV, and described reactor is the 5000pF controllable impedance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220177785 CN202649386U (en) | 2012-04-25 | 2012-04-25 | Alternating-current multi-circuit line corona characteristic test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220177785 CN202649386U (en) | 2012-04-25 | 2012-04-25 | Alternating-current multi-circuit line corona characteristic test system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202649386U true CN202649386U (en) | 2013-01-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220177785 Expired - Lifetime CN202649386U (en) | 2012-04-25 | 2012-04-25 | Alternating-current multi-circuit line corona characteristic test system |
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| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102654555A (en) * | 2012-04-25 | 2012-09-05 | 中国电力科学研究院 | AC (Alternating current) same-tower multi-circuit line corona feature test system and method thereof |
| CN110687371A (en) * | 2019-09-24 | 2020-01-14 | 中国电力科学研究院有限公司 | Method and system for determining lightning shielding failure performance of same-tower multi-circuit line |
-
2012
- 2012-04-25 CN CN 201220177785 patent/CN202649386U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102654555A (en) * | 2012-04-25 | 2012-09-05 | 中国电力科学研究院 | AC (Alternating current) same-tower multi-circuit line corona feature test system and method thereof |
| CN102654555B (en) * | 2012-04-25 | 2014-05-21 | 中国电力科学研究院 | AC (Alternating current) same-tower multi-circuit line corona feature test system and method thereof |
| CN110687371A (en) * | 2019-09-24 | 2020-01-14 | 中国电力科学研究院有限公司 | Method and system for determining lightning shielding failure performance of same-tower multi-circuit line |
| CN110687371B (en) * | 2019-09-24 | 2023-01-31 | 中国电力科学研究院有限公司 | Method and system for determining lightning shielding failure performance of same-tower multi-circuit line |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130102 Effective date of abandoning: 20140521 |
|
| RGAV | Abandon patent right to avoid regrant |