CN102073003B - Insulation test tool for gas-insulated metal-enclosed switchgear (GIS) - Google Patents
Insulation test tool for gas-insulated metal-enclosed switchgear (GIS) Download PDFInfo
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- CN102073003B CN102073003B CN2011100387167A CN201110038716A CN102073003B CN 102073003 B CN102073003 B CN 102073003B CN 2011100387167 A CN2011100387167 A CN 2011100387167A CN 201110038716 A CN201110038716 A CN 201110038716A CN 102073003 B CN102073003 B CN 102073003B
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- isolating switch
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Abstract
The invention relates to an insulation test tool for gas-insulated metal-enclosed switchgear (GIS) in the technical field of high-voltage switches. The insulation test tool comprises a power frequency test transformer, a thunder impulse generator, an impulse voltage leading-in sleeve, a voltage division coupler, a partial discharge calibration terminal, a three-phase transfer switch and four three-station isolating switches. In the insulation test tool, a thunder impulse test device is combined with a power frequency tolerance voltage test, two tests can be performed under the conditions of not changing the interval connection modes by switching the three-station isolating switches, and the test efficiency is improved. One set of intervals of 145kv and one set of intervals of 252kv can be jointed simultaneously by using two voltage classes of three-phase transfer. The insulation test tool structure for the GIS greatly improves the utilization rate of test equipment, and a thunder impulse test, a power frequency tolerance test and a partial discharging amount measurement test can be finished one time after interval joint; and the interval joint is more convenient.
Description
Technical field
What the present invention relates to is a kind of device of high-voltage switch gear technical field, specifically is a kind of Insulation Test frock that is used for Cubicle Gas-Insulated Switchgear.
Background technology
GIS must keep the reliability of height in using all the year round, must carry out various tests by the specification of design to equipment for this reason.Have in manufacturing plant: to used raw-material test, the semipilot of manufacture process, the typing of product and delivery test etc.Through test, grasp the situation of GIS insulation, can guarantee product quality or find its defective early, thereby safeguard accordingly and overhaul, guarantee the normal operation of equipment.
Insulation Test can be divided into insulation characterisitic test and dielectric voltage withstand test two big classes; The test of first kind insulation characterisitic is meant under low voltage or with other ways that can not damage insulation measures the various characteristics of insulation, like partial discharge test, thereby judges that there is zero defect insulation inside.Second type is the dielectric voltage withstand test, and the test of this type testing team insulation is strict, particularly can disclose the bigger centrality defective of those danger, and it can guarantee to insulate has certain level or nargin.
For the electrical test of dispatching from the factory of GIS, recommend to carry out the power frequency withstand test according to " GB/T 7674 rated voltage 72.5kV and above Cubicle Gas-Insulated Switchgear ", office high-volume measures, lightning impulse test.For these tests, present stage does not have test battery equipment can three kinds of tests all be accomplished under the situation that does not change connected mode.Present stage, most electrical test equipment all had some following shortcomings: general equipment all can only independently be tested the GIS equipment of different electric pressures, and testing equipment does not possess versatility, and test efficiency is not high.Mostly the electrical test equipment of the employed high-voltage switch gear of existing most high voltage switch gear factorys is to introduce from external well-known testing equipment manufacturer, and input cost is high.Carry out lightning impulse test comparatively difficulty is installed.Testing equipment docks inconvenience at interval with GIS.
Retrieval through to prior art is found; For example; The insulator arrangement that is published in the article introduction of the High-Voltage Electrical Appliances first phase by name " the SF6 Insulation Test voltage transformer system that Germany MWB produces " in nineteen ninety can only realize that the GIS equipment to a kind of electric pressure carries out office and high-volume measures; And to realize power frequency withstand test and lightning impulse test, need to introduce with many other equipment.
Summary of the invention
The present invention is directed to the above-mentioned deficiency that prior art exists; A kind of Insulation Test frock that is used for Cubicle Gas-Insulated Switchgear is provided; Through summing up the defective that the high-voltage switch gear electrical test equipment exists, brand-new version has been proposed, lightning impulse test device and power-frequency withstand voltage test are combined; Do not change through switching in of tri-station isolating switch under the situation of connected mode at interval and can carry out two kinds of tests, improve test efficiency.And the three-phase inversion through two electric pressures can realize docking simultaneously 145kV and each cover of 252kV interval.GIS Insulation Test tool structure of the present invention has improved the utilization factor of testing equipment greatly; And the disposable completion lightning impulse test of ability after docking at interval, the power frequency withstand test, three tests are high-volume measured by office; Butt joint is comparatively convenient at interval.
The present invention realizes through following technical scheme; The present invention includes: power frequency testing transformer, lightning impulse generator, surge voltage lead-in bushing, dividing potential drop coupling mechanism, shelf depreciation calibration terminal, three-phase change-over switch and four tri-station isolating switch; Wherein: the output terminal of first tri-station isolating switch links to each other with power frequency testing transformer with the dividing potential drop coupling mechanism successively; The output terminal of the 4th tri-station isolating switch links to each other with the lightning impulse generator with the surge voltage lead-in bushing successively; The input end of second tri-station isolating switch links to each other with first three-phase change-over switch; The input end of the 3rd tri-station isolating switch links to each other with second three-phase change-over switch, and the output terminal of the input end of the input end of first tri-station isolating switch, the 4th tri-station isolating switch, the output terminal of second tri-station isolating switch and the 3rd tri-station isolating switch all links to each other through bus.
Described power frequency testing transformer is connected with the dividing potential drop coupling mechanism through bus realizes high-volume experiment with measuring of power-frequency withstand voltage test drawn game;
Described lightning impulse generator is the surge generator of many capacitor parallel connections, ball-gap discharge form structure, specifically is made up of discharge capacity, ball discharge crack and current-limiting resistance.
The surge voltage lead-in bushing that described surge voltage lead-in bushing is an inflatable specifically is made up of insulator, guide rod and outside flange.
Described three-phase change-over switch is that rotary selection adds high pressure or the three-phase change-over switch of ground connection formula version, is made up of deflecting roller, radome and conducting rod;
Described tri-station isolating switch comprises: supporting seat, contact base, sliding conduction bar, insulated tension pole and disc insulator; Wherein: disc insulator is fixed on the bus; Supporting seat is installed on the disc insulator position and is connected with contact base through the sliding conduction bar, and insulated tension pole one end links to each other with contact base.
Described shelf depreciation calibration terminal comprises: square wave source and calibration capacitance, wherein: square wave source and calibration capacitance are installed together, and are external unit.It act as before GIS equipment is made an experiment, and the calibration of discharge capacity is carried out in measurement to the insulation frock.
Technique effect of the present invention is following:
1) the three-phase change-over switch operation is separate, and three-phase can switch to high pressure and ground connection respectively.Being beneficial to phase insulation test and three-phase fracture tests simultaneously.Operating grip should have the stopping blocking mechanism;
2) surge voltage lead-in bushing and three-station can tolerate long-term 1050kV lightning impulse voltage, and when product was carried out industrial frequency withstand voltage and partial discharge test, the surge voltage lead-in bushing broke off and ground connection, in case external disturbance gets into the test loop;
3) the shelf depreciation calibration terminal comes the calibration of apparent discharge capacity is carried out in the test loop through external switch and square-wave generator, and can effectively make calibration electrodes ground connection and electric blocking;
4) tri-station isolating switch can split or combination, can realize that industrial frequency withstand voltage and lightning impulse test change each other.
Description of drawings
Fig. 1 structural representation of the present invention.
Fig. 2 shelf depreciation calibration terminal synoptic diagram.
Fig. 3 embodiment work synoptic diagram.
Embodiment
Elaborate in the face of embodiments of the invention down, present embodiment provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment being to implement under the prerequisite with technical scheme of the present invention.
Shown in Fig. 1-3; Present embodiment comprises: power frequency testing transformer 1, lightning impulse generator (link to each other with lightning impulse lead-in bushing 11; Do not mark among the figure), surge voltage lead-in bushing 11, dividing potential drop coupling mechanism 2, shelf depreciation calibration terminal, 5,8 and four tri-station isolating switch 3,4,9,10 of three-phase change-over switch; Wherein: the output terminal of first tri-station isolating switch 3 links to each other with power frequency testing transformer 1 with dividing potential drop coupling mechanism 2 successively; The output terminal of the 4th tri-station isolating switch 10 links to each other with the lightning impulse generator with surge voltage lead-in bushing 11 successively; The input end of the 3rd tri-station isolating switch 9 links to each other with second three-phase change-over switch 8 successively; The input end of second tri-station isolating switch 4 links to each other with first three-phase change-over switch 5 successively, and the output terminal of the input end of the input end of first tri-station isolating switch 3, the 4th tri-station isolating switch 10, the output terminal of the 3rd tri-station isolating switch 9 and second tri-station isolating switch 4 all links to each other through bus.6,7 be in the process of the test 145kV and 252kVGIS at interval.
Described power frequency testing transformer 1 is the SF of horizontal type structure
6The gas-insulated testing transformer;
Described dividing potential drop coupling mechanism 2 is the SF of vertical structure
6Gas-insulated dividing potential drop coupling mechanism;
The concrete course of work of present embodiment is following:
Power-frequency withstand voltage test drawn game is high-volume measured:
145 tests at interval: power frequency testing transformer starts; The first and the 3rd tri-station isolating switch 3,9 "on" positions; The second and the 4th tri-station isolating switch 4,10 ground connection, three-phase change-over switch 8 closes a floodgate, and each carries out the power-frequency withstand voltage test to 8 pairs 145 of adjustment three-phase change-over switches mutually at interval.Test period is 1min, and power-frequency withstand voltage off-test step-down is later on carried out office and high-volume measured.
252 tests at interval: power frequency testing transformer starts; First and second tri-station isolating switch, 3,4 "on" positions; Third and fourth tri-station isolating switch, 9,10 ground connection, three-phase change-over switch 5 closes a floodgate, and each carries out the power-frequency withstand voltage test to 5 pairs 252 of adjustment three-phase change-over switches mutually at interval.Test period is 1min, and power-frequency withstand voltage off-test step-down is later on carried out office and high-volume measured.
Lightning impulse test:
145 tests at interval: the surge voltage lead-in bushing is connected to the lightning impulse generator; First and second tri-station isolating switch, 3,4 ground connection; Third and fourth tri-station isolating switch 9,10 closes a floodgate; Three-phase change-over switch 8 closes a floodgate, and each carries out lightning impulse test to 8 pairs 145 of adjustment three-phase change-over switches mutually at interval.
252 tests at interval: the surge voltage lead-in bushing is connected to the lightning impulse generator; The first and the 3rd tri-station isolating switch 3,9 ground connection; The second and the 4th tri-station isolating switch 4,10 closes a floodgate; Three-phase change-over switch 5 closes a floodgate, and each carries out lightning impulse test to 5 pairs 252 of adjustment three-phase change-over switches mutually at interval.
The technical requirement of table 1 testing transformer
The requirement of table 2 dividing potential drop coupler technologies
The requirement of table 2 dividing potential drop coupler technologies
500kV dividing potential drop coupling mechanism:
Claims (7)
1. Insulation Test frock that is used for Cubicle Gas-Insulated Switchgear; It is characterized in that; Comprise: power frequency testing transformer, lightning impulse generator, surge voltage lead-in bushing, dividing potential drop coupling mechanism, shelf depreciation calibration terminal, three-phase change-over switch and four tri-station isolating switch; Wherein: the output terminal of first tri-station isolating switch links to each other with power frequency testing transformer with the dividing potential drop coupling mechanism successively; The output terminal of the 4th tri-station isolating switch links to each other with the lightning impulse generator with the surge voltage lead-in bushing successively; The input end of second tri-station isolating switch links to each other with first three-phase change-over switch; The input end of the 3rd tri-station isolating switch links to each other with second three-phase change-over switch, and the output terminal of the input end of the input end of first tri-station isolating switch, the 4th tri-station isolating switch, the output terminal of second tri-station isolating switch and the 3rd tri-station isolating switch all links to each other through bus.
2. the Insulation Test frock that is used for Cubicle Gas-Insulated Switchgear according to claim 1 is characterized in that, described power frequency testing transformer is connected with the dividing potential drop coupling mechanism through bus realizes high-volume experiment with measuring of power-frequency withstand voltage test drawn game.
3. the Insulation Test frock that is used for Cubicle Gas-Insulated Switchgear according to claim 1; It is characterized in that; Described lightning impulse generator is the surge generator of many capacitor parallel connections, ball-gap discharge form structure, specifically is made up of discharge capacity, ball discharge crack and current-limiting resistance.
4. the Insulation Test frock that is used for Cubicle Gas-Insulated Switchgear according to claim 1 is characterized in that the surge voltage lead-in bushing that described surge voltage lead-in bushing is an inflatable specifically is made up of insulator, guide rod and outside flange.
5. the Insulation Test frock that is used for Cubicle Gas-Insulated Switchgear according to claim 1; It is characterized in that; Described three-phase change-over switch is that rotary selection adds high pressure or the three-phase change-over switch of ground connection formula version, is made up of deflecting roller, radome and conducting rod.
6. the Insulation Test frock that is used for Cubicle Gas-Insulated Switchgear according to claim 1; It is characterized in that; Described tri-station isolating switch comprises: supporting seat, contact base, sliding conduction bar, insulated tension pole and disc insulator; Wherein: disc insulator is fixed on the bus, and supporting seat is installed on the disc insulator position and is connected with contact base through the sliding conduction bar, and insulated tension pole one end links to each other with contact base.
7. the Insulation Test frock that is used for Cubicle Gas-Insulated Switchgear according to claim 1; It is characterized in that; Described shelf depreciation calibration terminal comprises: square wave source and calibration capacitance, wherein: square wave source and calibration capacitance are installed together, and are external unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100387167A CN102073003B (en) | 2011-02-16 | 2011-02-16 | Insulation test tool for gas-insulated metal-enclosed switchgear (GIS) |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100387167A CN102073003B (en) | 2011-02-16 | 2011-02-16 | Insulation test tool for gas-insulated metal-enclosed switchgear (GIS) |
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| CN102073003A CN102073003A (en) | 2011-05-25 |
| CN102073003B true CN102073003B (en) | 2012-08-08 |
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| CN2011100387167A Expired - Fee Related CN102073003B (en) | 2011-02-16 | 2011-02-16 | Insulation test tool for gas-insulated metal-enclosed switchgear (GIS) |
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Families Citing this family (11)
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| CN102721907A (en) * | 2012-06-13 | 2012-10-10 | 南方电网科学研究院有限责任公司 | Method for testing power-frequency and impulse superimposed voltage in high-altitude region |
| CN102830332A (en) * | 2012-09-04 | 2012-12-19 | 安徽省电力科学研究院 | Modularized defect simulator for local discharge detection of gas insulated switchgear |
| CN104360241B (en) * | 2014-09-26 | 2015-11-18 | 国家电网公司 | Gas-insulated impulse voltage generator unit impacts resistance characteristics pilot system and method |
| CN108490324A (en) * | 2018-04-04 | 2018-09-04 | 正泰电气股份有限公司 | High-potting phase-sequence changed device |
| CN111239559B (en) * | 2020-02-06 | 2022-04-12 | 云南电网有限责任公司电力科学研究院 | Online measurement method for equivalent discharge capacity of line fault arc |
| CN111913080A (en) * | 2020-07-06 | 2020-11-10 | 西安热工研究院有限公司 | Partial discharge test method for GIL connection mode transformer |
| CN113406489B (en) * | 2021-06-18 | 2023-07-21 | 国网宁夏电力有限公司培训中心 | Experimental system device for simulating real GIS three-station switch suspension potential |
| CN113933659A (en) * | 2021-08-30 | 2022-01-14 | 中国电力科学研究院有限公司 | Gas-insulated totally-enclosed combined switch examination test system and test method thereof |
| CN113917300B (en) * | 2021-10-08 | 2023-06-27 | 江苏安靠智能输电工程科技股份有限公司 | Direct connection device of gas-insulated high-voltage switch and power transformer |
| CN113985268A (en) * | 2021-10-29 | 2022-01-28 | 西安高压电器研究院有限责任公司 | Intelligent equipment for insulation test of medium-voltage switchgear |
| CN115792310B (en) * | 2023-02-01 | 2023-04-25 | 江苏安靠智能输电工程科技股份有限公司 | On-site experiment device and method for switching all-in-one machine |
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