CN104157434B - 220kV electric pressure gas-insulated transformer - Google Patents
220kV electric pressure gas-insulated transformer Download PDFInfo
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- CN104157434B CN104157434B CN201410416312.0A CN201410416312A CN104157434B CN 104157434 B CN104157434 B CN 104157434B CN 201410416312 A CN201410416312 A CN 201410416312A CN 104157434 B CN104157434 B CN 104157434B
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Abstract
The present invention relates to a kind of 220kV electric pressure gas-insulated transformer, belong to transformer technology field. Technical scheme is: comprise: the casing of 220kV gas-insulated transformer; The SF of 220kV high tension cable outlet6Gas, SF6Gas sleeve pipe and cable box; The device body of 220kV transformator, including iron core, coil and lead-in wire; On-load tap-changer of transformer; Gas density for second protection takes into account pressure monitoring device, burst pressure relay, gas thermometer, winding temperature gage; For the gilled radiator of transformer Cooling, gas circulator, gas flow indicator, blowing device, cooling system intelligent control box; Inside transformer insulation and cooling medium are SF6Gas. The method have the benefit that and compare with conventional oil-filled transformer, 220kV gas-insulated transformer has fire prevention, explosion-proof, security performance is high; Monitoring and relaying configuration are perfect, and the place being more suitable for being used in down town population concentration uses.
Description
Technical field
The present invention relates to a kind of 220kV electric pressure gas-insulated transformer, belong to transformer technology field.
Background technology
SF6Gas-insulated transformer is mainly used in the occasion that big city population is relatively concentrated, application is all 110kV and the gas-insulated transformer of following electric pressure at present, for the gas-insulated transformer of 110kV and following electric pressure, being also only limited to several transformator producer can make; And the gas-insulated transformer of 220kV electric pressure, but without relevant manufacture and application, along with the planning of domestic city and using electricity system, the demand of 220kV gas-insulated transformer is also progressively brought into schedule, therefore becomes a kind of demand for the technological development of 220kV electric pressure transformator.
Summary of the invention
It is an object of the present invention to provide a kind of 220kV electric pressure gas-insulated transformer, meet electricity consumption needs, solve Problems existing in background technology.
The technical scheme is that
220kV electric pressure gas-insulated transformer, comprises: the casing of 220kV gas-insulated transformer; The SF of 220kV high tension cable outlet6Gas-SF6Gas sleeve pipe and cable box; The device body of 220kV transformator, including iron core, coil and lead-in wire; On-load tap-changer of transformer; Gas density for second protection takes into account pressure monitoring device, burst pressure relay, gas thermometer, winding temperature gage; For the gilled radiator of transformer Cooling, gas circulator, gas flow indicator, blowing device, cooling system intelligent control box.
The first head of transformer body high pressure is from middle part width to extraction, adopt two-way parallel-connection structure, high pressure end head and tap are lifted one's head and are drawn from the both ends of coil, the structure that two-way is in parallel, and transformer high-voltage winding and low pressure winding and cushion block thereof, stay adopt the high temperature insulation part higher than E level.
Transformator 220kV high-pressure side adopts SF6Gas-SF6Gas sleeve pipe is connected with 220kV cable termination, it is achieved the extraction of high-pressure side 220kV voltage, meets the demand coupled with 220kV high tension cable.
Pressure monitoring device, gas thermometer, winding temperature gage realization is taken into account to power transformer interior fault, SF by burst pressure relay, gas density6The monitoring of the pressure of gas and density, temperature, it is achieved the second protection to transformator.
By the unlatching of thermometer, cooling system intelligent control box control by levels transformer gas circulating pump and blowing device and stopping, it is achieved the switching of the self cooling capacity of transformator and the air-cooled capacity of strong gas.
The built-in electrical insulation of transformator and cooling medium adopt SF6Gas, the casing of transformator adopts the standard that pressure vessel enters to be designed manufacturing, it is ensured that the intensity of 220kV electric pressure gas-insulated transformer and the SF of inside6Released gas rate less than 0.5%, SF6Gas-insulated transformer be a kind of do not fire, not quick-fried, do not reveal, non-maintaining equipment, be more suitable for urban population and concentrate safe class is required that higher place uses; Transformer high-voltage adopts SF6Gas-SF6The high tension cable storehouse that hv cable termination is coupled by gas sleeve pipe and transformer body are isolated, and form two independent air chambers, it is simple to the measurement of high voltage side of transformer shelf depreciation and the maintenance of 220kV end and replacing.
The described first head of transformer body high pressure is from middle part width to extraction, adopt two-way parallel-connection structure, high pressure end head and tap are lifted one's head and are drawn from the both ends of coil, the structure that two-way is in parallel, it is lift one's head 220kV high voltage coil head end to draw in the middle part of transformator, 220kV high pressure neutral point relatively low for electric pressure is lifted one's head and taps to lift one's head and draw from the upper and lower end parts of device body, end turn non-uniform electric field intensity is made to be greatly reduced, reduce the insulation size of end turn, reach transformer insulated performance relatively reliable, transformator height effectively reduces, save triple purposes of cost, the insulation that Transformer Winding adopts temperature classification to be E level, the insulating part (coil cushion block and stay) contacted with transformer winding wire cake heating part adopts the high temperature insulation part higher than E level, it is ensured that the ageing resistance of transformator.
Adopt 220kVSF6Gas-SF6Gas sleeve pipe solves the problem adopting traditional disc insulator scene to need additionally to arrange independent assay device when carrying out partial discharge test, and high-pressure side shelf depreciation can be directly monitored by this structure; Pass through SF6Gas-SF6Gas sleeve pipe is connected with 220kV cable termination and achieves the security performance that indoor substation 220kV high pressure does not expose, and substation equipment is more safe and reliable.
Transformator of the present invention has excellent second protection performance, when inside transformer breaks down, burst pressure relay sends trip signal; When temperature is too high hypertonia occurs time, temperature and gas density pressure monitoring instrument send alarm signal; Signal is sent by gas density pressure monitoring device when leaking air; Taken into account winding temperature gage when top layer gas and winding temperature are too high by the gas temperature being correlated with to send signal and protect.
Low pressure winding in transformer body adopts PET insulating self-adhesive transposed conductor to carry out continuous way coiling; High pressure winding adopts PET insulated combied conductor coiling, and middle part is drawn, formula structure is entangled with in two-way parallel connection; The insulating part (coil cushion block and stay) contacted with transformer winding wire cake heating part adopts the high temperature insulation part higher than E level, it is ensured that the ageing resistance of transformator; Transformer body major insulation adopts paper web-gap structure.
Transformator adopt combination vacuum type loaded switch, switch switching arc extinguishing carry out in vacuum bubbles, it is ensured that transformer switch in handoff procedure to SF6Gas does not affect; Switching switch adopts independent air chamber, it is simple to splits air-exchanging chamber deeply concerned when not affecting transformer body and overhauls.
Transformator adopts the SF to transformator air chamber of the dasymeter with temperature-compensating6The density of gas is monitored, and sends warning and trip signal when bulk gas density step-down by situation about reducing respectively, sends alarm for high voltage signal when inside transformer is increased to alarm for high voltage due to temperature; Transformer body, high tension cable storehouse, switching gas chamber are respectively provided with burst pressure relay, and when internal fault, the burst pressure actuating of relay sends trip signal; Transformator arranges top layer gas temperature and takes into account winding temperature gage, for the too high warning of temperature and the startup controlling chiller; Transformer cooling system is made up of gilled radiator, gas circulator, gas flow indicator, blowing device, cooling system intelligent control box, cooling system intelligent control box can by the temperature conditions of transformator automatically startup and stopping to air pump and blower fan be controlled.
The method have the benefit that and compare with conventional oil-filled transformer, 220kV gas-insulated transformer has fire prevention, explosion-proof, security performance is high; Monitoring and relaying configuration are perfect, and the place being more suitable for being used in down town population concentration uses.
Accompanying drawing explanation
Fig. 1 is the machine body structure figure of the present invention;
Fig. 2 is the front view of transformator of the present invention;
Fig. 3 is the top view of transformator of the present invention;
Fig. 4 is the side view of transformator of the present invention;
In figure: 1 is unshakable in one's determination, 2 low-voltage coils, 3 low-voltage coil overhang insulations, 4 coil pressure plates, 5 major insulations, 6 high-tension coils, 7 high-tension coil ends insulation, 8 high pressure ends and tap on lift one's head, 9 screens, 10 high pressure head end outlets, 11 high pressure ends and tap under lift one's head, 12 bottoms insulation, 13 device body supporting plates, 14 high tension cable boxes, 15 grounding sleeves, 16 gas tanks, 17 low-tension bushings, 18 gas flow indicators, 19 high pressure neutral bushings, 20 air pumps, 21 high tension cable box air chamber burst pressure relays, 22SF6Gas-SF6Gas sleeve pipe, 23 hv cable terminations, 24 gilled radiators, 25 blowing devices, 26 cooling system intelligent control box, 27 load ratio bridging switches, 28 switching gas chamber burst pressure relays, 29 body air chamber burst pressure relays, 30 body air chamber gas density monitoring forms, 31 switching gas chamber pressure monitoring tables, 32 high tension cable box air chamber gas density monitoring forms, 33 gas thermometers, 34 winding temperature gages.
Detailed description of the invention
Below in conjunction with accompanying drawing, by example, the invention will be further described.
It is the internal machine body structure of 220kV electric pressure gas-insulated transformer of the present invention shown in Fig. 1: unshakable in one's determination 1, low-voltage coil 2, low-voltage coil overhang insulation 3, coil pressure plate 4, major insulation 5, high-tension coil 6, high-tension coil end insulation 7, high pressure end and tap on lift one's head 8, screen 9, high pressure head end outlet 10,11 are lifted one's head under high pressure end and tap, bottom insulation 12, device body supporting plate 13.
The first head of low pressure, low pressure end head pass device body axial lead from the upper and lower end parts of coil; The first head of high pressure, from middle part width to extraction, adopts two-way parallel-connection structure, and high pressure end head and tap are lifted one's head and drawn from the both ends of coil, and two-way is in parallel is placed on the end turn being susceptible to electric field intensity concentration by high pressure neutral point relatively low for electric pressure; Major insulation 5 adopts the structure of the dispenser gap of paper web, stay, and transformator is combined into the device body of three-phase transformer by A, B, C three-phase device body, by inner lead and the SF in the low-tension bushing 17, Fig. 4 in Fig. 36Gas-SF6Load ratio bridging switch 27 in gas sleeve pipe 22, high pressure neutral bushing 19, Fig. 3 couples the high-low pressure realizing three-phase transformer and draws and load tapchanging function.
Fig. 2, Fig. 3, Fig. 4 show the three-view diagram outside 220kV electric pressure gas-insulated transformer of the present invention, including high tension cable box 14, grounding sleeve 15, gas tank 16, low-tension bushing 17, gas flow indicator 18, high pressure neutral bushing 19, air pump 20, high tension cable box air chamber burst pressure relay 21, SF6Gas-SF6Gas sleeve pipe 22, hv cable termination 23, gilled radiator 24, blowing device 25, cooling system intelligent control box 26, load ratio bridging switch 27, switching gas chamber burst pressure relay 28, body air chamber burst pressure relay 29, body air chamber gas density monitoring form 30, switching gas chamber pressure monitoring table 31, high tension cable box air chamber gas density monitoring form 32, gas thermometer 33, winding temperature gage 34.
Wherein pass through SF6Gas-SF6Gas sleeve pipe 22, high tension cable box 14, hv cable termination 23 and relevant inside couple conductor and realize coupling of 220kV high-pressure side and outside 220kV high tension cable; Coupling of transformer low voltage and outer low pressure electrical equipment is realized by low-tension bushing 17; Gas flow indicator 18, air pump 20, gilled radiator 24, blowing device 25, cooling system intelligent control box 26 are combined into transformer cooling system, promote inside transformer cooling medium SF by the operation of air pump 206The circulation of gas, improve radiating efficiency, gas flow indicator 18 is for indicating the running status of air pump, the circulation of gilled radiator 24 extraneous air is promoted by blowing device 25, improve heat-sinking capability further, be controlled by the cooling system intelligent control box 26 unlatching to air pump 20 and blowing device 25 and stopping by monitoring transformator top layer gas and winding temperature; As transformer high-voltage cable box SF6Air chamber, load ratio bridging switch SF6Air chamber, body SF6Air chamber once after inside breaks down, can pass through high tension cable box air chamber burst pressure relay 21, switching gas chamber burst pressure relay 28, body air chamber burst pressure relay 29 send the operation of trip signal disconnecting transformer; Body air chamber gas density monitoring form 30, switching gas chamber pressure monitoring table 31, high tension cable box air chamber gas density monitoring form 32 is for transformer high-voltage cable box SF6Air chamber, load ratio bridging switch SF6Air chamber, body SF6The SF of three air chambers of air chamber6Gas density and pressure are monitored, and send low pressure alarming, low-voltage tripping and alarm for high voltage signal to control the properly functioning of transformator; Gas thermometer 33 is used for monitoring transformer top SF6The temperature of gas, winding temperature gage 34, for monitoring the temperature of Transformer Winding, is controlled startup and the stopping of transformer cooling system, can send alarm for high voltage and trip signal to control the normal operating condition of transformator simultaneously by temperature signal.
Claims (1)
1. a 220kV electric pressure gas-insulated transformer, it is characterised in that comprise: the casing of 220kV gas-insulated transformer; The SF of 220kV high tension cable outlet6Gas-SF6Gas sleeve pipe and cable box; The device body of 220kV transformator, including iron core, coil and lead-in wire; On-load tap-changer of transformer; Gas density for second protection takes into account pressure monitoring device, burst pressure relay, gas thermometer, winding temperature gage; For the gilled radiator of transformer Cooling, gas circulator, gas flow indicator, blowing device, cooling system intelligent control box;
The first head of transformer body high pressure is from middle part width to extraction, adopt two-way parallel-connection structure, high pressure end head and tap are lifted one's head and are drawn from the both ends of coil, the structure that two-way is in parallel, and transformer high-voltage winding and low pressure winding and cushion block thereof, stay adopt the high temperature insulation part higher than E level;
Transformator 220kV high-pressure side adopts SF6Gas-SF6Gas sleeve pipe is connected with 220kV cable termination, it is achieved the extraction of high-pressure side 220kV voltage, meets the demand coupled with 220kV high tension cable;
By the unlatching of thermometer, cooling system intelligent control box control by levels transformer gas circulating pump and blowing device and stopping, it is achieved the switching of the self cooling capacity of transformator and the air-cooled capacity of strong gas;
The built-in electrical insulation of transformator and cooling medium adopt SF6Gas, the casing of transformator adopts the standard of pressure vessel to be designed manufacturing, it is ensured that the intensity of 220kV electric pressure gas-insulated transformer and the SF of inside6Released gas rate is less than 0.5%; Transformer high-voltage adopts SF6Gas-SF6Gas sleeve pipe, isolates high tension cable storehouse and the transformer body that hv cable termination couples, forms two independent air chambers, it is simple to the measurement of high voltage side of transformer shelf depreciation and the maintenance of 220kV end and replacing;
Described transformator has second protection performance, when inside transformer breaks down, burst pressure relay sends trip signal; When temperature is too high hypertonia occurs time, temperature and gas density pressure monitoring instrument send alarm signal; Signal is sent by gas density pressure monitoring device when leaking air; Taken into account winding temperature gage when top layer gas and winding temperature are too high by the gas temperature being correlated with to send signal and protect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410416312.0A CN104157434B (en) | 2014-08-22 | 2014-08-22 | 220kV electric pressure gas-insulated transformer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410416312.0A CN104157434B (en) | 2014-08-22 | 2014-08-22 | 220kV electric pressure gas-insulated transformer |
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| CN104157434A CN104157434A (en) | 2014-11-19 |
| CN104157434B true CN104157434B (en) | 2016-06-15 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104914362A (en) * | 2015-05-26 | 2015-09-16 | 深圳供电局有限公司 | Insulation state monitoring system and method of SF6 gas transformer |
| CN106935375A (en) * | 2015-12-29 | 2017-07-07 | 保定保菱变压器有限公司 | A kind of SF6 gas-insulated transformer |
| CN110797170A (en) * | 2018-08-01 | 2020-02-14 | 特变电工衡阳变压器有限公司 | Converter transformer |
| CN113611507A (en) * | 2021-09-03 | 2021-11-05 | 国网陕西省电力公司延安供电公司 | Mixed gas insulated transformer |
| CN113948285A (en) * | 2021-10-26 | 2022-01-18 | 保定保菱变压器有限公司 | Novel environment-friendly gas-insulated distribution transformer and assembly method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2004288877A (en) * | 2003-03-20 | 2004-10-14 | Tm T & D Kk | Gas-insulated transformer |
| CN201196902Y (en) * | 2008-04-30 | 2009-02-18 | 保定天威集团有限公司 | Sulfur hexafluoride gas insulating transformer |
| CN101840772A (en) * | 2010-03-15 | 2010-09-22 | 常州天道变压器有限公司 | Gas insulating transformer |
| CN102237191B (en) * | 2010-12-30 | 2012-10-03 | 保定天威集团有限公司 | Sulfur hexafluoride (SF6) gas insulated traction transformer in auto-transformer (AT) power supply mode |
| JP2013171947A (en) * | 2012-02-20 | 2013-09-02 | Toshiba Corp | Gas insulated transformer |
| CN203616435U (en) * | 2013-12-25 | 2014-05-28 | 保定天威保变电气股份有限公司 | On-site 220V SF6 gas test device |
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