CN101446617A - Test apparatus of DC gas insulated metal enclosed transmission line (GIL) - Google Patents
Test apparatus of DC gas insulated metal enclosed transmission line (GIL) Download PDFInfo
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- CN101446617A CN101446617A CNA2008101129902A CN200810112990A CN101446617A CN 101446617 A CN101446617 A CN 101446617A CN A2008101129902 A CNA2008101129902 A CN A2008101129902A CN 200810112990 A CN200810112990 A CN 200810112990A CN 101446617 A CN101446617 A CN 101446617A
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- 238000012360 testing method Methods 0.000 title claims abstract description 95
- 230000005540 biological transmission Effects 0.000 title claims abstract description 23
- 239000002184 metal Substances 0.000 title claims abstract description 15
- 239000012212 insulator Substances 0.000 claims abstract description 58
- 238000009413 insulation Methods 0.000 claims abstract description 27
- 239000002245 particle Substances 0.000 claims abstract description 13
- 229920002379 silicone rubber Polymers 0.000 claims abstract description 5
- 238000007599 discharging Methods 0.000 claims description 24
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 20
- 230000005611 electricity Effects 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 9
- 230000007704 transition Effects 0.000 claims description 6
- 150000001875 compounds Chemical class 0.000 claims description 4
- 230000005684 electric field Effects 0.000 claims description 4
- 239000011521 glass Substances 0.000 claims description 4
- 238000009826 distribution Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 230000003595 spectral effect Effects 0.000 claims description 3
- 239000002131 composite material Substances 0.000 abstract 1
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 238000013461 design Methods 0.000 description 8
- 238000011160 research Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- VMQPMGHYRISRHO-UHFFFAOYSA-N benzvalene Chemical group C1=CC2C3C1C32 VMQPMGHYRISRHO-UHFFFAOYSA-N 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
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Abstract
The invention relates to a test apparatus of a DC gas insulated metal enclosed transmission line (GIL). The apparatus has the test capabilities of SF6 gas clearance insulation tests, insulator surface flashover characteristic tests and metallic conducting particle tests, and can well meet insulation test requirements of the DC GIL. The apparatus approximately takes the shape of 'L', and comprises a high-voltage lead end, a high-voltage equalizing ring and a silicon rubber composite insulator high-voltage bushing in the vertical direction and high-voltage guide electrodes which are coaxially distributed and positioned in the middle along the horizontal direction, a peripheral test apparatus shell, and a transverse test apparatus shell which is composed of three air chambers together.
Description
Technical field
The present invention relates to high-tension transmission circuit and insulation technology field.
Background technology
Gas-insulated metal closed power transmission line (GIL:Gas Insulated Metal EnclosedTransmission Line) comes from SF
6The metal enclosed bus of insulation is a kind of employing SF
6Gas or SF
6And N
2The high voltage of mixed gas insulation, shell and conductor coaxial arrangement, high current power transmission equipment.Its electrical specification is similar to overhead transmission line, the naked problem of aging, and loss is low, and safety is good, and the occupation of land space is little, has advantage aspect the high capacity long distance powedr transmission.The research and development of this technology start from the sixties in 20th century, and purpose is to realize the underground transmission circuit suitable with the overhead transmission line transmission line capability.The HighVoltage Power Corporation company of predecessor of U.S. CGIT Systems.Inc. company 1972 in N.J. Hudson Installation in Plant first in the world GIL, so far still at reliability service.According to the GIS of the council of IEEE/PES transformer station (gas-insulated metal-enclosed combined electrical apparatus) subcommittee statistics in 2004, global 73-1200kV gas-insulated transmission line always is about 198km.The longest GIL is in the Tokyo, total length 3.3km, rated voltage 275kV.
Because SF
6Gas has excellent insulation and arc extinction performance, is the best in the world present insulating medium, is widely used in the High-Voltage Electrical Appliances field.Gas-insulated metal closed power transmission line is as a kind of novel transmission line of electricity, have that transmission capacity is big, loss is little, component modelsization, take up an area of less, reliability is safe, non-maintaining, the life-span long, to advantages such as environmental impact are little, the employing of GIL, the transmission line of electricity that can solve special climate, particular surroundings and special location sets up problem, by making rational planning for and designing, not only system cost can be significantly reduced, and system reliability can be improved.Yet for a long time, influenced slowly by the direct current transportation technical development, the research at DC gas insulated metal enclosed transmission line of electricity (GIL) is very few specially both at home and abroad, does not form direct current GIL product.Up to now, the electric pressure scope of the interchange GIL in the worldwide is 73～1200kV.Insulating Design is the key technique of direct current GIL, comprises the selection of coaxial electrode clearance for insulation size, the design of benzvalene form and support insulator contour structures, and the inhibition of metallic conducting particle.For the good direct current GIL of design synthesis insulating property, need carry out a large amount of SF
6Gas gap Insulation Test, the test of insulator surface flashover characteristics and metallic conducting particle test.
Be research SF
6The alternating current-direct current gas insulated metal enclosed combined electrical apparatus (GIS) of gas-insulated characteristic and design excellent insulation performance and exchange GIL, domestic and international how tame correlative study mechanism and Utilities Electric Co. have designed and have been used for SF
6The container or the device of gas-insulated test, but there are many weak points in these test units or container when being used for direct current GIL Insulation Test.As the diameter 2m of W.Boeck research group of Univ Munich Germany design, the large-scale vertical SF of long 5m
6Gas-insulated test chamber, cumulative volume are 17m
3, test each time all needs to fill a large amount of gas, charges and discharge gas during test and the gas purification workload is big; Single vertical air chamber makes the disc insulator can only horizontal positioned, can't carry out the test of metallic conducting particle to the influence of disc insulator insulating property.Kansai Electric Power Co. then directly adopts not improved GIS bus section, busbar section to carry out the disc insulator test, and this test unit can well carry out the insulator arc-over attribute testing, but is inconvenient to carry out various SF
6The insulation characterisitic test of gas gap and metallic conducting particle test.The researcher of masschusetts, u.s.a science and engineering technical college has designed the SF of coaxial horizontal positioned
6The Insulation Test device can carry out concentric cylinder SF
6Gap insulation test, but can't lay the disc insulator line correlation test of going forward side by side.Artificial research such as domestic professor Qiu Yuchang of Xi'an Communications University SF
6Gas-insulated characteristic and the insulator model carried out the measurement of surface charge has designed the SF of band extreme ultraviolet quartz window
6The gas-insulated test chamber can be observed ultraviolet light and visible light in the discharge process; But this test chamber also is the form that adopts vertical structure, is inconvenient to carry out the disc insulator correlation test.
In sum, there is not a kind of device that is specifically designed to direct current GIL Insulation Test at present both at home and abroad, relevant SF both at home and abroad
6Gas-insulated test unit or container, or only be fit to SF
6The test of gas gap insulation characterisitic, or the test of the correlation properties that only are suitable for insulating.Do not possess SF simultaneously
6The test capability of test of gas gap Insulation Test, insulator surface flashover characteristics and metallic conducting particle test can't satisfy the needs of direct current GIL Insulation Test.And the gas-insulated test unit of DC gas insulated metal enclosed transmission line of electricity of the present invention can overcome above-mentioned deficiency, can possess the test of above-mentioned multiple requirement, thereby has satisfied the needs of direct current GIL Insulation Test well.
Summary of the invention
When design direct current GIL integral insulation structure, need the different air pressure of research, different electrode shape, different surface roughness, different electrode overlay film situation to SF
6The influence of gas-insulated characteristic, disc insulator, support insulator surface charge gather mechanism and to the characteristics of motion of the influence of insulator arc-over characteristic, metallic conducting particle and to the problem of the aspects such as influence of insulator arc-over characteristic, for this reason, the present invention proposes following test unit.
According to the experimental study device that is used for DC gas insulated metal enclosed transmission line of electricity of the present invention, the profile that it has roughly " L " type comprises high-voltage connection end, high pressure grading ring and the silicon rubber compound insulator bushing arranged on the vertical direction; And in the horizontal direction, the test unit shell that is positioned at middle high pressure guide rod electrode and periphery of coaxial distribution; No. 1 air chamber, No. 2 air chambers and No. 3 horizontal test unit shells of the common composition of air chamber, described three air chambers are isolated by No. 1 disc insulator and No. 2 disc insulators becomes independently air chamber, and described three air chambers also have corresponding independent charging and discharging valve respectively: No. 1 charging and discharging valve, No. 2 charging and discharging valve and No. 3 charging and discharging valve; Be provided with rain glass or densitometer on described each charging and discharging valve.
It is constant that the air pressure of No. 1 air chamber of this device keeps, be not used in test, described No. 3 air chambers are the test unit section, No. 2 disc insulators and support insulator and metallic conducting particle by arranging multi-form excellent plate electrode, coaxial cylindrical electrode, different size carry out SF in described No. 3 air chambers
6The test of gas gap insulation characterisitic, insulator arc-over attribute testing and metallic conducting particle test.No. 3 charging and discharging valve of described No. 3 air chambers are provided with the gas densitometer of band temperature compensation.
Described support insulator is provided with the shielding grading shield, the electric field of maskable high pressure guide rod electrode tip.
Described No. 3 air chambers can be installed the electrode pair of same shaft housing electrode to cooperate high pressure guide rod electrode to form of different specification size, described high pressure guide rod electrode can be changed by the electrode transition piece of No. 2 disc insulator right-hand members, thereby, carry out the gas gap insulation characterisitic test of difformity and different roughness by changing the size and the roughness of described high pressure guide rod electrode and auxiliary electrode thereof.
Described No. 3 air chamber ends are provided with detachable flange arrangement.
No. 1 quartz glass watch window, No. 2 quartz glass watch windows, No. 3 quartz glass watch windows and master trip quartz glass watch window are installed on described No. 2 air chambers and No. 3 air chambers, described quartz glass is the extreme ultraviolet material, to the wavelength light in the spectral range of 200nm～800nm that sends in the discharge process, its transmitance is greater than 90%.
This device also has stainless device supporting seat and auxiliary support frame supports described test unit body, and body can steadily be placed and move.
Beneficial effect of the present invention is:
1. gas-insulated test unit of the present invention adopts the segmental structure design of three air chamber forms, reduced the use amount of gas in the process of the test, and make to charge and discharge the gas operating process and become very simple, thereby satisfied the needs of direct current GIL Insulation Test better;
2. the present invention is by being installed in the electrode transition piece between disc insulator and the high pressure guide rod electrode, can conveniently change high pressure guide rod electrode, thereby, carry out the gas gap insulation characterisitic test of difformity and different roughness by changing the size and the roughness of described high pressure guide rod electrode and auxiliary electrode thereof;
3. the present invention can be used for shielding the electric field of high pressure guide rod electrode tip by the shielding grading shield is set on support insulator, corona discharge can not occur when making test.
Description of drawings
Fig. 1 is the general structure synoptic diagram according to the gas-insulated test unit of DC gas insulated metal enclosed transmission line of electricity of the present invention (GIL);
Fig. 2 is the vertical view of general structure of the gas-insulated test unit of foundation DC gas insulated metal enclosed transmission line of electricity of the present invention (GIL) as shown in Figure 1.
Wherein, the parts of each Reference numeral representative are among the figure:
1-high-voltage connection end;
2-high pressure grading ring;
3-silicon rubber compound insulator bushing;
The 4-1 disc insulator;
5-1 quartz glass watch window;
6-2 disc insulator (test disc insulator);
7-2 quartz glass watch window;
8-electrode transition piece;
9-high pressure guide rod electrode;
10-3 quartz glass watch window;
11-shields grading shield;
12-master trip quartz glass watch window;
The 13-1 charging and discharging valve;
The 14-1 air chamber;
15-device supporting seat;
High-pressure conductor in the middle of the 16-;
The 17-2 air chamber;
The 18-auxiliary support frame;
19-test unit shell;
The 20-3 air chamber;
21-support insulator (test support insulator);
The 22-2 charging and discharging valve;
The 23-3 charging and discharging valve;
The 24-4 charging and discharging valve;
The 25-flange.
Embodiment
Specifically describe according to the The Nomenclature Composition and Structure of Complexes that is used for the experimental study device of DC gas insulated metal enclosed transmission line of electricity (GIL) of the present invention below.Shown in Fig. 1 device one-piece construction figure and Fig. 2 device vertical view.
As shown in Figure 1, have roughly the profile that is " L " type according to whole test device of the present invention, its in the vertical direction is provided with high-voltage connection end 1, high pressure grading ring 2 and silicon rubber compound insulator bushing 3.In the horizontal direction, middle high pressure guide rod electrode 9 and the 19 coaxial distributions of test unit shell, 17, No. 3 air chambers of 14, No. 2 air chambers of No. 1 air chamber of unit module 20 are formed horizontal test unit shell 19, and wherein No. 1 air chamber 14 is arranged vertically, and No. 2 air chambers 17 and No. 3 air chambers 20 are horizontally disposed.Three air chambers are by 2 disc insulators, also promptly No. 1 and No. 2 disc insulators are kept apart and are become independently air chamber, and three air chamber unit all have accordingly independently charging and discharging valve respectively: 13, No. 2 charging and discharging valve 22 of No. 1 charging and discharging valve and No. 3 charging and discharging valve 23.No. 3 air chambers 20 also add has charging and discharging valve 24 No. 4.Be provided with rain glass or densitometer on each charging and discharging valve, can inflate separately and exit.Adopt the segmental structure design of three air chamber forms according to test unit of the present invention, reduced the use amount of gas in the process of the test, and make and charge and discharge the gas operating process and become very simple.
It is constant that the air pressure of No. 1 air chamber 14 generally keeps, and gas is not changed, and this air chamber is not used in any test.No. 3 air chamber 20 is the test unit section, can carry out test of SF6 gas gap insulation characterisitic and insulator arc-over attribute testing by No. 2 disc insulators 6 and the support insulator 21 of arranging multi-form excellent plate electrode, coaxial cylindrical electrode and different size.In No. 3 air chambers 20, reasonably arrange metallic conducting particle, can also carry out the metallic conducting particle correlation test.Can be replaced by the gas densitometer of band temperature compensation at the gas densitometer that is equipped with a band temperature compensation on No. 3 charging and discharging valve 23 on No. 3 air chambers 20 in addition or with the rain glass on No. 3 charging and discharging valve 23, this gas densitometer can compensation temperature to the influence of test findings.
No. 1 disc insulator 4 and No. 2 disc insulators 6 are fixed on the test unit shell 19 by flange, and the base of support insulator 21 is by being bolted on the test unit shell 19.No. 2 disc insulators 6 and support insulator 21 can be used for the correlation test of insulator, and No. 2 disc insulators 6 and support insulator 21 can be changed use.
No. 3 air chambers 20 can be installed the electrode pair of same shaft housing electrode to cooperate high pressure guide rod electrode 9 to form of different specification size, be provided with the electrode transition piece between No. 2 disc insulators and the high pressure guide rod electrode, high pressure guide rod electrode 9 can be changed by the electrode transition piece 8 of No. 2 disc insulator 6 right-hand members, thereby can carry out the gas gap insulation characterisitic test of difformity and different roughness by changing the size and the roughness of high pressure guide rod electrode 9 and auxiliary electrode thereof.
No. 3 air chamber 20 outer ends are provided with detachable flange 25 structures, can come to provide the operating space for changing electrode by shedding this flange.On No. 2 air chambers 17 and No. 3 air chambers 20 7, No. 3 quartz glass watch windows 10 of 5, No. 2 quartz glass watch windows of No. 1 quartz glass watch window and master trip quartz glass watch window 12 are installed.This quartz glass is the extreme ultraviolet material, and to the wavelength light in the spectral range of 200nm～800nm that sends in the discharge process, its transmitance can monitor the generating process of discharge greater than 90% by the high-speed camera instrument.
Stainless device supporting seat 15 and auxiliary support frame 18 support the test unit body, and body can steadily be placed, and be convenient for changing electrode, and device can steadily be moved.
The present invention has been described according to preferred embodiment.Obviously, reading and understanding above-mentioned detailed description postscript and can make multiple correction and replacement.What this invention is intended to is that the application is built into all these corrections and the replacement that has comprised within the scope that falls into the appended claims or its equivalent.
Claims (8)
1, a kind of experimental study device that is used for DC gas insulated metal enclosed transmission line of electricity, the profile that it has roughly " L " type comprises high-voltage connection end, high pressure grading ring and the silicon rubber compound insulator bushing arranged on the vertical direction; And in the horizontal direction, the test unit shell that is positioned at middle high pressure guide rod electrode and periphery of coaxial distribution; No. 1 air chamber, No. 2 air chambers and No. 3 horizontal test unit shells of the common composition of air chamber, described three air chambers are isolated by No. 1 disc insulator and No. 2 disc insulators becomes independently air chamber, and described three air chambers also have corresponding independent charging and discharging valve respectively: No. 1 charging and discharging valve, No. 2 charging and discharging valve and No. 3 charging and discharging valve; Be provided with rain glass or densitometer on described each charging and discharging valve.
2, according to the described gas-insulated test unit of claim 1, the air pressure that it is characterized in that described No. 1 air chamber keeps constant, be not used in test, described No. 3 air chambers are the test unit section, No. 2 disc insulators and support insulator and metallic conducting particle by arranging multi-form excellent plate electrode, coaxial cylindrical electrode, different size carry out SF in described No. 3 air chambers
6The test of gas gap insulation characterisitic, insulator arc-over attribute testing and metallic conducting particle test.
3,, it is characterized in that No. 3 charging and discharging valve of described No. 3 air chambers are provided with the gas densitometer of band temperature compensation according to the described gas-insulated test unit of claim 2.
4,, it is characterized in that described support insulator is provided with the shielding grading shield, the electric field of maskable high pressure guide rod electrode tip according to the described gas-insulated test unit of claim 3.
5, according to the described gas-insulated test unit of claim 4, it is characterized in that the electrode pair of same shaft housing electrode that described No. 3 air chambers can be installed different specification size to cooperate high pressure guide rod electrode to form, described high pressure guide rod electrode can be changed by the electrode transition piece of No. 2 disc insulator right-hand members, thereby, carry out the gas gap insulation characterisitic test of difformity and different roughness by changing the size and the roughness of described high pressure guide rod electrode and auxiliary electrode thereof.
6,, it is characterized in that described No. 3 air chamber ends are provided with detachable flange arrangement according to the described gas-insulated test unit of claim 5.
7, according to the described gas-insulated test unit of claim 6, it is characterized in that being equipped with on described No. 2 air chambers and No. 3 air chambers No. 1 quartz glass watch window, No. 2 quartz glass watch windows, No. 3 quartz glass watch windows and master trip quartz glass watch window, described quartz glass is the extreme ultraviolet material, to the wavelength light in the spectral range of 200nm～800nm that sends in the discharge process, its transmitance is greater than 90%.
8, according to the described gas-insulated test unit of claim 1-7, it is characterized in that also having stainless device supporting seat and auxiliary support frame and support described test unit body, body can steadily be placed and move.
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|---|---|---|---|
| CN2008101129902A CN101446617B (en) | 2008-05-27 | 2008-05-27 | Test apparatus of DC gas insulated metal enclosed transmission line (GIL) |
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|---|---|---|---|
| CN2008101129902A CN101446617B (en) | 2008-05-27 | 2008-05-27 | Test apparatus of DC gas insulated metal enclosed transmission line (GIL) |
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| CN101446617B CN101446617B (en) | 2011-04-20 |
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| CN101865939A (en) * | 2010-06-17 | 2010-10-20 | 中国电力科学研究院 | Generation device for very fast transient overvoltage |
| CN102565636A (en) * | 2011-11-15 | 2012-07-11 | 国网电力科学研究院 | Ultrahigh-voltage oil-SF6 sleeve test device |
| CN101718824B (en) * | 2009-12-07 | 2012-07-18 | 中国电力科学研究院 | Experiment device used for extra-high voltage alternating current-direct current gas insulated metal enclosed transmission line |
| CN102707207A (en) * | 2012-06-12 | 2012-10-03 | 杭州西湖电子研究所 | Simulating device for various discharges inside GIS (Gas Insulated Switchgear) |
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