CN106019022B - Cover plate test device for connecting gas chamber between oil-gas type transformer and GIS and operation method - Google Patents
Cover plate test device for connecting gas chamber between oil-gas type transformer and GIS and operation method Download PDFInfo
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- CN106019022B CN106019022B CN201610520166.5A CN201610520166A CN106019022B CN 106019022 B CN106019022 B CN 106019022B CN 201610520166 A CN201610520166 A CN 201610520166A CN 106019022 B CN106019022 B CN 106019022B
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- 238000012360 testing method Methods 0.000 title claims abstract description 121
- 238000000034 method Methods 0.000 title claims description 13
- 238000007789 sealing Methods 0.000 claims abstract description 26
- 239000000463 material Substances 0.000 claims description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 239000004033 plastic Substances 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 229910001369 Brass Inorganic materials 0.000 claims description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- 239000010951 brass Substances 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000007769 metal material Substances 0.000 claims description 2
- 238000011017 operating method Methods 0.000 claims 1
- 238000012986 modification Methods 0.000 abstract description 2
- 230000004048 modification Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 8
- 238000013461 design Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Housings And Mounting Of Transformers (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The invention provides a cover plate test device for a connection air chamber of an oil-gas type transformer and a GIS (gas insulated switchgear), which comprises an insulating plate fixedly connected to the connection air chamber and a corrugated pipe fixedly arranged on the insulating plate inside the connection air chamber, wherein a positioning pin is arranged on the insulating plate and used for fixing a dynamic test conducting rod, the corrugated pipe is fixedly connected with the dynamic test conducting rod, the dynamic test conducting rod passes through the insulating plate and the corrugated pipe and is connected with a concave contact, a grounding binding post is arranged on the insulating plate, and the grounding binding post is arranged in a sealing cover. The connecting air chamber cover plate test device can be completed on the basis of the original cover plate holes, so that the aims of easy modification, simple operation, safety and reliability are fulfilled, the working efficiency and the power supply reliability are effectively improved, and the personal safety is guaranteed to the greatest extent.
Description
Technical Field
The invention relates to a cover plate test device and an operation method for a gas chamber connected by an oil-gas type transformer and a GIS (Gas Insulated Substation gas-insulated fully-closed combined electrical apparatus), and belongs to the field of high-voltage tests of transformers.
Background
In an electric power system, an oil-gas type transformer (a transformer group composite combined electrical apparatus, expressed by a T-GIS) is gradually popularized and applied, and because the oil-gas type transformer is different from a traditional electric power transformer in high-voltage outgoing line mode and structure, according to national GB 50150-2006 Electrical device installation engineering Electrical equipment handover test Standard and industry Standard Q/GDW 1168-2013 Electrical equipment state maintenance test procedure, the oil-gas type transformer cannot be tested by adopting the traditional method when the oil-gas type transformer electrical test is carried out, because the oil-gas type transformer high-voltage three-phase sleeve is directly output through a GIS (Gas Insulated Substation gas-insulated fully-closed combined electrical apparatus) and a cable which are connected with the oil-gas type transformer.
The conventional method is that before the high-voltage electric test of the power transformer is carried out, the tested transformer is required to be powered off, and then the terminal heads on all the high and low outgoing lines (through the sleeve, the GIS or the cable) are disconnected. If the test is to be performed on the oil-gas type transformer in operation, SF6 gas in a connecting air chamber between the oil-gas type transformer and a GIS (Gas Insulated Substation gas-insulated fully-closed combined electrical apparatus) must be removed, a cover plate on the connecting air chamber is removed, and the test can be performed on the side of removing a connector between an oil-gas sleeve and the GIS (Gas Insulated Substation gas-insulated fully-closed combined electrical apparatus). The time for carrying out various tests on the connection of new equipment is quite plentiful, but the time for carrying out high-voltage electrical tests on the running transformer is too short (the power failure time of a general power system is not more than 12 hours), if the high-voltage test project carried out on the oil-gas type transformer is completed by removing the gas in the connection air chamber, the wiring is restored, the connection air chamber is fully filled with the gas and is still left for 24 hours (the test can be carried out after the SF6 gas is filled into the electrical equipment for 24 hours according to the standard 20.0.5 of the electrical equipment connection test of GB 50150-2006), the gas test can be carried out after the gas is qualified, and the method has long time and low efficiency and influences on the power supply reliability.
In order to ensure the reliability of power supply and shorten the time for testing the SF6 gas discharged by the connecting air chamber, the SF6 gas filled and the oil-gas type transformer body after power failure, the invention provides a connecting air chamber cover plate testing device for connecting the oil-gas type transformer with a GIS (Gas Insulated Substation gas-insulated fully-closed combined electrical apparatus), which can easily solve the problems.
Noun interpretation:
oil-gas type transformer: the oil-gas type transformer is also called a transformer group composite type combined electrical apparatus (represented by T-GIS), and refers to that a transformer high-voltage outgoing line is not led out through a capacitive sleeve, but is directly connected with a GIS (Gas Insulated Substation gas-insulated fully-closed combined electrical apparatus), and is led to a transmission tower through a cable in the GIS (Gas Insulated Substation gas-insulated fully-closed combined electrical apparatus).
And (3) connecting an air chamber: the connecting air chamber is an independent air chamber connected between the oil-gas type transformer and the GIS (Gas Insulated Substation gas-insulated fully-closed combined electrical appliance), and an ABC three-phase main loop conducting rod which is detachably connected with the oil-gas type transformer and the GIS (Gas Insulated Substation gas-insulated fully-closed combined electrical appliance) is arranged in the air chamber. If the oil-gas type transformer is required to be subjected to a factory test or a field handover acceptance test, the air chamber is required to be removed, and after a special test device with an outer sleeve is installed at a high-voltage output position of the oil-gas type transformer, the acceptance test of the oil-gas type transformer can be performed according to the high-voltage test item and method of national standard GB 50150-2006 Electrical device installation engineering and Electrical Equipment handover test Standard; if the oil-gas type transformer is required to be subjected to periodic detection test, SF6 gas in the air chamber is required to be removed, then a cover plate is opened, an ABC three-phase main loop conducting rod is removed, and then a conventional test is carried out on the oil-gas type transformer according to high-voltage test items and methods of the industry standard Q/GDW 1168-2013 'power transmission and transformation equipment state overhaul test procedure'.
Disclosure of Invention
The traditional connecting air chamber cover plate between the oil-gas type transformer and the GIS is only used for dismantling the connecting and sealing functions of the internal ABC three-phase conducting rod.
In order to solve the technical problems, the invention provides a cover plate test device for a connecting air chamber of an oil-gas type transformer and a GIS, which solves the problems that the connecting air chamber needs to be exhausted, inflated and the cover plate of the connecting air chamber and an internal conducting rod are removed during the oil-gas type transformer test.
The invention is realized by the following technical scheme:
a apron test device for oil gas formula transformer and GIS are connected air chamber, its characterized in that includes the insulating board of fixed connection on connecting the air chamber and connect the bellows of air chamber internal fixation on the insulating board, the insulating board on be equipped with the locating pin for fixed dynamic test conducting rod, the bellows with move the fixed continuous of test conducting rod, dynamic test conducting rod passes insulating board and bellows and links to each other with concave type contact, be equipped with a ground connection terminal on the insulating board, the ground connection terminal sets up in the sealed cowling.
And a sealing rubber pad is arranged between the sealing cover and the insulating plate.
Wherein, the sealing rubber pad is arranged at the cover plate hole of the connecting air chamber.
The concave contact is connected with a main loop conducting rod connected with the inside of the air chamber in the test position.
The movable test conducting rod is in short-circuit connection and is connected with the grounding binding post when in an operating position.
Wherein, the material of the dynamic test conducting rod is copper or galvanized material.
Wherein, the material of the seal cover is plastic steel material.
Wherein, the concave contact is made of soft metal.
Wherein the soft metal material is brass material or galvanized material.
The operation method of the cover plate test device for the gas chamber connected with the oil-gas type transformer and the GIS is characterized by comprising the following steps of:
(1) And (3) installing a cover plate: the method comprises the steps of mounting a gas chamber test device special for connecting an oil gas type transformer with a GIS combined electrical appliance on a cover plate on an original connecting gas chamber cover plate hole, mounting a dynamic test conducting rod, a corrugated pipe, a concave contact, a positioning pin and a grounding binding post for test on an insulating plate, adjusting the position of the corrugated pipe to enable the concave contact to be in good contact with a three-phase main circuit conducting rod, pushing the dynamic test conducting rod, adjusting the position of the concave contact away from the three-phase main circuit conducting rod by means of the corrugated pipe, screwing the positioning pin, fixing the insulating plate on a connecting gas chamber body, connecting the dynamic test conducting rod with the grounding binding post, and standing for 24 hours;
(2) Test position: the circuit breaker and the isolating switch on the loop of the oil-gas type transformer and the GIS combined electrical apparatus are disconnected, at least one disconnection point is arranged between the oil-gas type transformer and the GIS combined electrical apparatus, the high-voltage output of the oil-gas type transformer is in a suspended state, the rest part of the GIS combined electrical apparatus is grounded, a sealing cover on a cover plate test device of a connecting air chamber of the oil-gas type transformer and the GIS combined electrical apparatus is opened, a short circuit line on a movable test conducting rod and a grounding binding post is removed, an ABC three-phase movable test conducting rod is pushed respectively, the movable test conducting rod drives a concave contact to be well connected with the ABC three-phase main loop conducting rod by means of the elasticity of a corrugated pipe, and the three-phase movable test conducting rods on the insulating plate and the ground can bear an alternating voltage of 10kV withstand voltage level;
(3) Operating position: after the test is finished, the locating pin is loosened, the concave contact is driven by the ABC three-phase movable test conducting rod to leave the ABC three-phase main loop conducting rod by means of resilience force of the corrugated pipe, the ABC three-phase movable test conducting rod and the concave contact reach the running position, the locating pin is screwed down, the ABC three-phase movable test conducting rod is short-circuited and connected with the grounding binding post, the sealing rubber pad is arranged after the test insulating board is well sealed, and the rear part of the plastic steel sealing cover is buckled to be capable of running.
The invention provides a cover plate test device for mounting three phases on a cover plate for high-voltage test extraction. When the oil-gas type transformer test is required, opening a plastic steel sealing cover on the connecting air chamber, removing three-phase grounding binding posts on the insulating plate, pushing a dynamic test conducting rod on the cover plate, enabling the inner corrugated pipe to drive the test conducting rod and the concave contact to contact the main loop conducting rod, and then screwing a positioning pin to perform a high-voltage test; when the insulating cover plate is in an operating state, the positioning pin is loosened, the movable test conducting rod is separated from the main loop conducting rod by means of resilience force of the corrugated pipe, the positioning pin is screwed, and the three-phase movable test conducting rod outside the insulating cover plate is in short circuit grounding. The height of the plastic steel sealing cover is determined according to the external height of the test conducting rod in the running state.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, when a periodic test is required in the normal operation process of the power system, the working time can be shortened, the labor is saved, compared with the traditional work which can be completed only by carrying out procedures such as exhausting, inflating, static discharging and the like on the connecting air chamber, the oil-gas type transformer body test work can be completed by external simple operation, the working efficiency is effectively improved, time and labor are saved, the power supply reliability is ensured, the overhaul test quality is improved, the safety risk is reduced, and the safety of personnel, a power grid and equipment is ensured. The invention has novel design and reasonable structure, does not need to change the structure of the original connecting air chamber, only needs to be refitted on the original cover plate, has quick assembly, reliable insulation and simple operation, greatly ensures personal safety and has better economic and social benefits.
Drawings
Fig. 1 is a schematic diagram of a three-dimensional structure of a connection between an oil-gas type transformer and a GIS combined electrical apparatus.
FIG. 2 is a schematic diagram of the inside of a connecting air chamber between an oil-gas type transformer and a GIS combined electrical apparatus.
Fig. 3 is a schematic diagram of the testing device for the air chamber cover plate connected between the oil-gas type transformer and the GIS combined electrical apparatus in the testing position.
Fig. 4 is a schematic diagram of the testing device for the air chamber cover plate connected between the oil-gas type transformer and the GIS combined electrical apparatus in the operation position.
In the figure: 1. the gas chamber is connected, 2, the main loop conducting rod, 3, the oil gas type transformer, 4, the sealed cowling, 5, the locating pin, 6, the ground connection terminal, 7, concave contact, 8, the sealed cushion, 9, the dynamic test conducting rod, 10, the bellows, 11, the insulation board, 12, GIS combined electrical apparatus.
Detailed Description
The present invention will be described in further detail with reference to examples. The following embodiments are merely examples of the present invention, but the design concept of the present invention is not limited thereto, and any insubstantial modifications made by the design of the present invention should be made within the scope of the present invention.
Examples
As shown in fig. 1, a schematic diagram of a three-dimensional structure of a connection between an oil-gas type transformer and a GIS combined electrical apparatus is shown, a connection air chamber 1 is arranged between the oil-gas type transformer 3 and the GIS combined electrical apparatus 12, and a sealing cover 4 is arranged on the connection air chamber 1.
As shown in fig. 2, the connecting air chamber 1 of the invention has an internal structure schematic diagram, one end of the connecting air chamber 1 is connected with the oil-gas type transformer 3, the other end is connected with the GIS combined electrical apparatus 12, a three-phase main loop conducting rod 2 is arranged in the connecting air chamber 1, and a sealing cover 4 is arranged on the connecting air chamber 1.
Fig. 3 is a schematic diagram of the testing device for the air chamber cover plate connected between the oil-gas type transformer and the GIS combined electrical apparatus in the testing position. The invention provides a cover plate test device for an oil-gas type transformer and a GIS (gas insulated switchgear) connecting air chamber, which mainly comprises a sealing cover 4, a locating pin 5, a grounding binding post 6, a concave contact 7, a sealing rubber pad 8, a dynamic test conducting rod 9, a corrugated pipe 10, an insulating plate 11 and the like.
And (3) cover plate installation: the invention relates to a test device which is specially used for connecting an oil gas type transformer 3 with a GIS combined electrical appliance 12 and is used for connecting the air chamber 1 on a cover plate hole of an original connecting air chamber 1, wherein a dynamic test conducting rod 9, a corrugated pipe 10, a concave contact 7, a positioning pin 5 and the like for testing are arranged on an insulating plate 11, the position of the corrugated pipe 10 is adjusted, so that the concave contact 7 is well contacted with a three-phase main circuit conducting rod 2 of the dynamic test conducting rod, the dynamic test conducting rod 9 is pushed, the position of the concave contact 7 away from the three-phase main circuit conducting rod 2 is adjusted by the corrugated pipe 10, the positioning pin 5 is screwed, an insulating plate 11 is fixed on a connecting air chamber body 1, the dynamic test conducting rod 9 is connected with a grounding terminal 6, SF6 gas tightness test and a gas test project are carried out after the static placing is carried out for 24 hours, and a plastic steel sealing cover 4 is buckled after the dynamic test is qualified.
Test position: the circuit breaker and the isolating switch on the loop of the oil-gas type transformer 3 and the GIS combined electrical apparatus 12 are disconnected, so that at least one disconnection point exists between the oil-gas type transformer 3 and the GIS combined electrical apparatus 12, the high-voltage output of the oil-gas type transformer 3 is in a suspended state, and the rest part of the GIS combined electrical apparatus 12 is grounded. The sealing cover 4 on the cover plate test device of the air chamber 1 is opened, the movable test conducting rod 9 and the short-circuit line on the grounding terminal 6 are removed, the ABC three-phase movable test conducting rod 9 is pushed respectively, the movable test conducting rod 9 drives the concave contact 7 to be well connected with the ABC three-phase main circuit conducting rod 2 by means of the elasticity of the corrugated pipe 10, and the three-phase movable test conducting rod 9 on the insulating plate 11 and the ground can bear an alternating current voltage of 10kV withstand voltage level.
Fig. 4 is a schematic diagram of the testing device for the air chamber cover plate connected between the oil-gas type transformer and the GIS combined electrical apparatus in the operation position.
Operating position: after the test is finished, the positioning pin 5 is loosened by means of resilience force of the corrugated pipe 10, the concave contact 7 is driven by the ABC three-phase dynamic test conducting rod 9 to leave the ABC three-phase main loop conducting rod 2, the ABC three-phase dynamic test conducting rod 9 and the concave contact 7 reach the running position, the positioning pin 5 is screwed down, the ABC three-phase dynamic test conducting rod 9 is short-circuited and connected with the grounding binding post 6, the sealing rubber cushion 8 is arranged after the test insulating plate 11 is sealed well, and the rear part of the plastic steel sealing cover 4 is buckled to be capable of running.
Claims (1)
1. The operation method of the cover plate test device for the connection air chamber of the oil-gas type transformer and the GIS comprises an insulating plate fixedly connected to the connection air chamber and a corrugated pipe fixedly arranged on the insulating plate inside the connection air chamber, wherein a positioning pin is arranged on the insulating plate and used for fixing a dynamic test conducting rod, the corrugated pipe is fixedly connected with the dynamic test conducting rod, the dynamic test conducting rod passes through the insulating plate and the corrugated pipe and is connected with a concave contact, a grounding binding post is arranged on the insulating plate, and the grounding binding post is arranged in a sealing cover;
a sealing rubber pad is arranged between the sealing cover and the insulating plate;
the sealing rubber pad is arranged at a cover plate hole connected with the air chamber;
the concave contact is connected with a main loop conducting rod connected with the inside of the air chamber when in a test position;
the movable test conducting rod is in short circuit connection and is connected with the grounding binding post when in an operation position;
the material of the dynamic test conducting rod is copper or galvanized material;
the sealing cover is made of plastic steel;
the concave contact is made of soft metal;
the soft metal material is brass or galvanized material;
characterized in that the operating method comprises the following steps:
(1) And (3) installing a cover plate: the method comprises the steps of mounting a gas chamber test device special for connecting an oil gas type transformer with a GIS combined electrical appliance on a cover plate on an original connecting gas chamber cover plate hole, mounting a dynamic test conducting rod, a corrugated pipe, a concave contact, a positioning pin and a grounding binding post for test on an insulating plate, adjusting the position of the corrugated pipe to enable the concave contact to be in good contact with a three-phase main circuit conducting rod, pushing the dynamic test conducting rod, adjusting the position of the concave contact away from the three-phase main circuit conducting rod by means of the corrugated pipe, screwing the positioning pin, fixing the insulating plate on a connecting gas chamber body, connecting the dynamic test conducting rod with the grounding binding post, and standing for 24 hours;
(2) Test position: the circuit breaker and the isolating switch on the loop of the oil-gas type transformer and the GIS combined electrical apparatus are disconnected, at least one disconnection point is arranged between the oil-gas type transformer and the GIS combined electrical apparatus, the high-voltage output of the oil-gas type transformer is in a suspended state, the rest part of the GIS combined electrical apparatus is grounded, a sealing cover on a cover plate test device of a connecting air chamber of the oil-gas type transformer and the GIS combined electrical apparatus is opened, a short circuit line on a movable test conducting rod and a grounding binding post is removed, an ABC three-phase movable test conducting rod is pushed respectively, the movable test conducting rod drives a concave contact to be well connected with the ABC three-phase main loop conducting rod by means of the elasticity of a corrugated pipe, and the three-phase movable test conducting rods on the insulating plate and the ground can bear an alternating voltage of 10kV withstand voltage level;
(3) Operating position: after the test is finished, the locating pin is loosened, the concave contact is driven by the ABC three-phase movable test conducting rod to leave the ABC three-phase main loop conducting rod by means of resilience force of the corrugated pipe, the ABC three-phase movable test conducting rod and the concave contact reach the running position, the locating pin is screwed down, the ABC three-phase movable test conducting rod is short-circuited and connected with the grounding binding post, the sealing rubber pad is arranged after the test insulating board is well sealed, and the rear part of the plastic steel sealing cover is buckled to be capable of running.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610520166.5A CN106019022B (en) | 2016-07-05 | 2016-07-05 | Cover plate test device for connecting gas chamber between oil-gas type transformer and GIS and operation method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610520166.5A CN106019022B (en) | 2016-07-05 | 2016-07-05 | Cover plate test device for connecting gas chamber between oil-gas type transformer and GIS and operation method |
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| Publication Number | Publication Date |
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| CN106019022A CN106019022A (en) | 2016-10-12 |
| CN106019022B true CN106019022B (en) | 2024-03-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610520166.5A Active CN106019022B (en) | 2016-07-05 | 2016-07-05 | Cover plate test device for connecting gas chamber between oil-gas type transformer and GIS and operation method |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107727989A (en) * | 2017-10-10 | 2018-02-23 | 大唐国际发电股份有限公司北京高井热电厂 | The test method of oil-gas casing structure transformer |
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| CN202817558U (en) * | 2012-09-19 | 2013-03-20 | 吉林省电力有限公司吉林供电公司 | Auxiliary test tool for oil and gas bushing transformer |
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| CN106019022A (en) | 2016-10-12 |
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