CN202210646U - 40.5 kV metal-armored withdrawable switching equipment applied to high altitude environment - Google Patents
40.5 kV metal-armored withdrawable switching equipment applied to high altitude environment Download PDFInfo
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- CN202210646U CN202210646U CN 201120363467 CN201120363467U CN202210646U CN 202210646 U CN202210646 U CN 202210646U CN 201120363467 CN201120363467 CN 201120363467 CN 201120363467 U CN201120363467 U CN 201120363467U CN 202210646 U CN202210646 U CN 202210646U
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Abstract
The utility model discloses 40.5 kV metal-armored withdrawable switching equipment applied to an high altitude environment, which comprises a switch cabinet, wherein the switch cabinet comprises a shell, a plurality of compartments inside the switch cabinet as well as primary components and secondary components arranged in the compartments; an electric clearance inside the cabinet is controlled to be more than or equal to 360 mm, meanwhile clearances of all charged bodies to ground are also more than or equal to 360 mm; creepage distances of all components are controlled to be over 1265 mm; and contact boxes are separated by bending plates. The equipment disclosed by the utility model has the advantages that an external insulation strength margin is sufficiently large, so that correction requirements due to the external insulation strength reduction which is caused by high-altitude air density reduction are satisfied, therefore the impact withstanding voltage and the power frequency withstanding voltage of products reach requirements on high-altitude use; moreover, 40.5 kV complete switching equipment, which is suitable for high-altitude regions, has safety in use and reliability in operation and ensures service life, is provided.
Description
Technical field
The utility model relates to a kind of switchgear, is specifically related to use the 40.5kV ac metal closing switch gear of altitude environment.
Background technology
At present, high and low pressure switchgear assembly and control appliance are the infrastructure of electrical network, are widely used in all trades and professions along with the development of electric power, and be for very big contribution has been made in national economic development and social progress, also closely bound up with common people's daily life.Because of having a large capacity and a wide range,, broad particular surroundings---the high altitude localities of market demand is just arranged wherein so environment for use is varied.The highlands is because height above sea level is higher relatively, and air pressure and density are lower, and air absolute humidity is little, and air themperature is low, and the temperature difference is big; Hours of daylight is long, and solar irradiance is higher, and ultraviolet ray is strong, and the plateau soil moisture is low simultaneously; The frozen soil area is wide, and freeze-off time is long, and year day with wind of gale force is many, and precipitation is few.These abominable natural climate characteristics have following four to influence rule greatly to the electric equipment performance:
1, the lower influence of air pressure and density
1. to the influence of dielectric intensity
The reduction of air pressure and density causes the reduction of external insulation intensity.At height above sea level to the 5000m scope, every rising 1000m, i.e. every reduction by the 7.7 ~ 10.5kPa of average gas pressure, external insulation intensity reduces by 8% ~ 13%;
2. to the influence of electric clearance puncture voltage
For the product of design typification, because its electric clearance is fixing, with the reduction of air pressure, its puncture voltage also descends.In order to guarantee that product has enough anti-breakdown capabilities when altitude environment is used, must increase electric clearance.
3. a) the high altitude low air pressure of influencing to corona and discharge voltage reduces the partial discharge inception voltage of high-voltage motor, and corona inception voltage reduces, the corona seriously corroded;
B) high altitude low air pressure descends the power capacitor air pressure inside, causes partial discharge inception voltage to reduce;
C) high altitude low air pressure reduces lightning arrester inner chamber voltage, causes power-frequency sparkover voltage to reduce.4. the reduction that influences air pressure or atmospheric density to the device for switching arc extinction performance reduces the device for switching arc extinction performance of air dielectric arc extinguishing, and make-break capacity descends and the energising lost of life.The arcing time of direct-current arc raises with height above sea level or the air pressure reduction prolongs; The flashover distance of direct current and alternating current arc raises with height above sea level or the air pressure reduction increases.5. to the medium cooling effect, i.e. the reduction that influences air pressure or atmospheric density of product temperature rise causes the reduction of air dielectric cooling effect.For being the electric product of main radiating mode with free convection, forced ventilation or air radiator, because the decline of heat-sinking capability, temperature rise increases.At height above sea level to the 5000m scope, every rising 1000m, i.e. every reduction by the 7.7 ~ 10.5kPa of average gas pressure, temperature rise increases by 3% ~ 10%.
A) rate that increases that raises with height above sea level of the temperature rise of static electrical equipment, every 100m generally in 0.4K, but to thermoelectric device occurred frequently, like electrical equipment such as electric furnace, resistor, electric welding machines, the rate that increases that temperature rise raises with height above sea level, every 100m reaches more than the 2K.B) the power transformer temperature rise is relevant with the type of cooling with increasing of height above sea level, and the every 100m of its increment rate is: oil, 0.4% of specified temperature rise; Dry type is self cooling, 0.5% of specified temperature rise; Oil-immersed air-blast cooling, 0.6% of specified temperature rise; The dry type forced air cooling, 1.0% of specified temperature rise; C) temperature rise of motor is 1% of specified temperature rise with the every 100m of the rate that increases that height above sea level raises.6. influencing of product mechanical structure and sealing a) caused low-density, low concentration, the physics of porous material (for example: electrical insulating material, heat-barrier material etc.) and the variation of chemical property; B) volatilization of plasticizer is quickened in the evaporation of lubricant and the plastic products; C) owing to the increase of external and internal pressure difference, gas or liquid are prone to from airtight container, leak or leakage rate increases, and the electric product of seal request is arranged, and remote-effects are to electric property; D) cause the variation of pressure that pressure-vessel bears, cause pressure-vessel to break easily.
2, the influence that reduces of air absolute humidity
1) influence of the external dielectric strength of absolute humidity
Average absolute humidity raises with height above sea level and reduces.When absolute humidity reduced, the external insulation intensity of electric product reduced, and therefore will consider the humidity correction of power-frequency sparkover voltage and impulse flashover voltage.
2) absolute humidity increases the commutation spark of commutator machine to the reduction that influences absolute humidity of motor commutation and carbon brush wearing and tearing, and the wear rate of motor carbon is increased.
3, the influence that air themperature reduces and the temperature difference increases
1) the altitude environment air themperature all raises with height above sea level to the compensation average air temperature of product temperature rise and high air temperature and reduces, and the thermal lifetime of electrical insulating material is decided by the average air temperature.The reduction of altitude environment air themperature can partly or entirely compensate the increase because of air pressure reduction causing electric product temperature rise in service.The offset of ambient air temperature is 0.5K/hm.2) variations in temperature makes product casing easy deformation, be full of cracks to the bigger variations in temperature of the influence of product structure, and hermetically-sealed construction breaks easily.
4, the hours of daylight long, solar irradiance comprises the influence that ultraviolet radiation illumination increases1) the plateau thermal radiation increases when influencing height above sea level 5000m maximum solar degree 1.25 times of analog value during for low height above sea level, thermal radiation plays heat effect to object.For the outdoor electric product, the increase of sun heat radiation causes that bigger surface adds temperature rise, makes japanning accelerate to fade, the plastics accelerated ageing, and the material capability of reduction organic insulating material produces mechanical thermal stress.And reduce machinery and electric property, produce the influence such as be obstructed of lubriation material curing, oily evaporation, heat radiation of electrical apparatus or resistance heating.2) the plateau ultraviolet radiation increases, and to influence ultraviolet radiation illumination more much bigger than the increment rate of global solar radiation illumination with the increment rate that height above sea level raises, when having reached low height above sea level during height above sea level 3000m 2 times of analog value.Ultraviolet ray causes that the surface of organic insulating material changes, and the mechanical performance of thin-walled or plastic film and electric property are worsened, and transparent plastic becomes fragile even chaps.The accelerated ageing of insulating material also possibly make the easy ionization of air and cause external insulation intensity and corona inception voltage to reduce.The components and parts of existing widely used electric complete set of equipments shell structure and technology, type selecting assembling and insulating material etc., by national technical standard limit environment for use be high voltage electric equipment at height above sea level below 1000 meters, low voltage electrical equipment is at height above sea level below 2000 meters.Therefore, existing electric complete set of equipments can not satisfy the stability that the highlands electric equipment must possess safe handling and reliability service well, satisfies the requirement in certain useful life.
The utility model content
The utility model has overcome the deficiency of prior art; A kind of special 40.5kV metal-clad moveable formula switchgear to the altitude environment design is provided; This switchgear is to the special Environment Design in plateau; Solved can not satisfying the highlands electric equipment well and must possessing the safe handling and the stability of reliability service, the technical problem that lack useful life of existing in the prior art.
For solving above-mentioned technical problem, the utility model adopts following technical scheme:
A kind of 40.5kV metal-clad moveable formula switchgear that is applied to altitude environment; Comprise switch cubicle; And described switch cubicle is made up of a plurality of compartments in shell and the switch cubicle and the components and parts and the Quadratic Finite Element device that are installed in the compartment, and described components and parts comprise: current transformer, voltage transformer, earthed switch, vacuum circuit-breaker, fuse, transformer, insulating part, main bus bar and branch bar, high voltage reactor, high pressure parallel single-phase capacitor; Described a plurality of compartment comprises circuit breaker cart chamber, bus-bar room, cable vault, relay control room, separates with dividing plate between a plurality of compartments; At the indoor guide rail that is equipped with of circuit breaker cart, the confession circuit breaker cart slides and works; Bus casing and contact box are installed in the bus-bar room, and bus casing is used for fixing main bus bar and satisfies the main bus bar insulating requirements; The inside of described cable vault is equipped with current transformer, earthed switch; The Quadratic Finite Element device that described relay control room is equipped with relaying protection element, instrument, electrification display and primary element is monitored, controls, protected; The described electric clearance that is applied to the 40.5kV metal-clad moveable formula switchgear of altitude environment is controlled at more than or equal to 360mm; The distance to the ground of each electrified body also is more than or equal to 360mm simultaneously; The creepage distance of each components and parts is all controlled more than the 1265mm, separates with bent plate between the contact box.
Technical scheme further is:
Put insulating cover can not satisfying on the components and parts of electric clearance and creepage distance, to satisfy insulating requirements.
Described circuit breaker cart chamber, bus-bar room, cable vault are provided with pressure release passage, and described pressure release passage all links to each other with pressure relief device.
Described circuit breaker cart chamber, cable vault add heater respectively.
The little bus of described main bus bar and branch all adopts rectangular bus bar.
Set up 5 * 40mm in the described cable vault separately
2The ground connection copper bar.
Lightning arrester is installed in the described cable vault.
Compared with prior art, the beneficial effect of the utility model is:
1, external insulation intensity nargin is enough big, satisfied that high height above sea level atmospheric density descends the external insulation intensity decreases that causes and the requirement revised, thereby the shock-resistant voltage of product and power-frequency withstand voltage reaches the requirement of high height above sea level use; 2, insulating material is selected for use and is received the insulating material that difference variation is little and the anti-aging degree is high (like modified epoxy etc.); Guaranteeing the high-intensity while; Deflection and degree of aging are less; Adapt to the place that insulation coordination is had relatively high expectations, satisfied creepage distance, the electric clearance dimensional requirement of height above sea level correction factor requirement simultaneously.
Generally speaking the utility model provides a kind of 40.5kV switchgear assembly that the high altitude localities is safe in utilization, reliable, guarantee useful life that is suitable for.
Description of drawings
Fig. 1 is the utility model structural representation;
Fig. 2 is the end view of the utility model Fig. 1.
Embodiment
Below in conjunction with accompanying drawing the utility model is done further to set forth.
As shown in Figure 1; A kind of 40.5kV metal-clad moveable formula switchgear that is applied to altitude environment; Comprise switch cubicle; And described switch cubicle is made up of a plurality of compartments in shell and the switch cubicle and the components and parts and the Quadratic Finite Element device that are installed in the compartment, and described components and parts comprise: current transformer, voltage transformer, earthed switch, vacuum circuit-breaker, fuse, transformer, insulating part, main bus bar and branch bar, high voltage reactor, high pressure parallel single-phase capacitor; Described a plurality of compartment comprises circuit breaker cart chamber B, bus-bar room A, the C of cable vault, the D of relay control room, separates with dividing plate between a plurality of compartments.The shell of switch cubicle and dividing plate are to apply plumbous zinc steel plate with 2MM after the horizontal bed of numerical control adds formula and bends, to be spliced, and the switch cubicle that therefore assembles can be protected the uniformity on the size.Switch cubicle has very strong anticorrosive and antioxidation, and the mechanical strength higher than equal steel plate arranged.
Described circuit breaker cart chamber B, bus-bar room A, C top, cable vault are provided with pressure release passage, and described pressure release passage all links to each other with pressure relief device.When circuit breaker or bus generation internal fault; Follow the appearance of electrical radian; The switch cubicle air pressure inside raises, and the special seal circle that is installed on the door seals the cabinet front, and the pressure that install at the top discharges metallic plate and will be opened automatically; Release pressure and drainage gas are to guarantee operating personnel and switch cubicle safety.
In the B of circuit breaker cart chamber, guide rail is installed, confession circuit breaker cart 1 slides and works; Bus casing 8 and contact box 6 are installed in the bus-bar room A, and bus casing 8 is used for fixing main bus bar and satisfies the main bus bar insulating requirements; And main bus bar causes another switch cubicle from a switch cubicle, and fixing through little bus of branch and contact box 6, bus casing 8 is used for fixing the little bus of main bus bar and branch so that both pass through the switch cubicle dividing plate; All bus can coat with the pyrocondensation insulating sleeve as required.The little bus of flat branch is connected in contact box 6 and main bus bar through bolt, if special requirement is arranged, the attachment bolt on the bus row can have insulating case and end cap encapsulation.When bus passes through the switch cubicle dividing plate, fixing with bus casing 8, if internal fault electric arc can the restriction accident spread to adjacent cabinet, and can ensure the mechanical strength of bus.The little bus of main bus bar and branch all adopts rectangular bus bar.
The inside of the C of cable vault is equipped with current transformer 3, earthed switch 5, also lightning arrester can be installed; The Quadratic Finite Element device that the described relay D of control room is equipped with relaying protection element, instrument, electrification display and primary element is monitored, controls, protected.Control circuit is laid in the wire casing in enough spaces; And there is the metal cover board envelope to protect; The left side wire casing is for the introduction of controlling little bus and draws reservation; The inner secondary wire routing of switch cubicle also has reliable interlock, for operating personnel provide reliable fail safe protection with equipment on the right side in the switch cubicle.Circuit breaker cart chamber B, the C of cable vault add heater respectively, can prevent in the bigger climatic environment of high-temperature or variations in temperature, to produce the danger that condensation brings.Set up 5 * 40mm in the C of cable vault separately
2The ground connection copper bar; This ground connection copper bar can run through adjacent each cabinet; And well contact with cabinet, the components and parts that this ground connection is arranged direct ground connection use, simultaneously since whole cabinet shell splice mutually with deposited plumbous zine plate; Whole cabinet all is among the good earth state, guarantees that the operation personnel touch cabinet safety.
The described electric clearance that is applied to the 40.5kV metal-clad moveable formula switchgear of altitude environment of the utility model must be controlled at more than or equal to 360mm; The distance to the ground of each electrified body also is more than or equal to 360mm simultaneously, and the creepage distance of each components and parts is all controlled more than the 1265mm.Separate with bent plate 10 between the contact box 6.Put insulating cover can not satisfying on the components and parts of electric clearance and creepage distance, to satisfy insulating requirements.
Be described in detail the application of the utility model below again.
The environment for use condition of the utility model:
Height above sea level: be no more than 4000M;
Ambient air temperature is no more than 40 degrees centigrade, and the temperature-averaging value that in 24 hours, records is no more than 35 degrees centigrade;
Minimum ambient air temperature is not less than-25 degrees centigrade;
Ambient humidity: the water vapour pressure mean value that in 24 hours, records is no more than 2.2KPA;
The place that does not have high vibration;
Earthquake intensity is no more than 8 grades.
In order to adapt to the needs of altitude environment; The utility model is chosen as dedicated electrical device, the especially high tension apparatus of the special development in high altitude localities, as adopting plateau type transformer, plateau type vacuum circuit-breaker etc.; For between the cabinet inner wire, the air gap of conductor between over the ground handle by high altitude localities insulation distance requirement; Prevent insulation breakdown, electric clearance and ground clearance all are controlled at more than or equal to 360mm, and the creepage distance of components and parts is controlled at more than the 1265mm.4 requirements are considered and satisfied to the components and parts and the insulating material type selecting that are applied to the 40.5kV metal-clad moveable formula switchgear of altitude environment:
1. external insulation intensity nargin is enough big, satisfied that high height above sea level atmospheric density descends the external insulation intensity decreases that causes and the requirement revised, thereby the shock-resistant voltage of product and power-frequency withstand voltage reaches the requirement of high height above sea level use; 2. for kit internal mechanical driving member, cause the influence of material deformation greatly to tolerance like consideration plateau variations in temperature such as operation handcart, releases; 3. the reduction of air pressure or atmospheric density causes the reduction of air dielectric cooling effect; The influence that causes temperature rise to raise, especially high-current device has been considered to fall to hold and has been used; It falls the appearance coefficient confirms according to height above sea level is different, concrete with reference to the technical descriptioon of device production producer.4. insulating material is selected for use and is received the insulating material that difference variation is little and the anti-aging degree is high (like modified epoxy etc.); Guaranteeing the high-intensity while; Deflection and degree of aging are less; Adapt to the place that insulation coordination is had relatively high expectations, satisfied creepage distance, the electric clearance dimensional requirement of height above sea level correction factor requirement simultaneously.
The 40.5kV metal-clad moveable formula switchgear that the utility model is applied to altitude environment to one, the arrangement requirement of two wires is higher, whole bus-bar system designs again.Electric clearance and creepage distance are revised according to the correction factor of high height above sea level, and temperature rise heat radiation requirement is satisfied in reasonable, the attractive in appearance and the shortest design of busbar of whole spatial placement.The utility model is a benchmark with the 1000m height above sea level, and the determined coefficient of industry standard is satisfied in the correction of height above sea level coefficient.Different altitude height, its correction factor is different, is not influencing under the big situation too of structure and shape size; Absolute elevation raises as far as possible; Because by the rule of its correction factor, the height that the correction factor of higher height above sea level can compatible next grade can reduce the design kind like this; Reduce multiple type that absolute elevation caused, make things convenient for the standardization drawing.The switch cubicle structural design key place of the utility model is to be furnished with enough locus and carries out the installation of bus-bar system; Need revise according to the height above sea level correction factor based on electric clearance, creepage distance and isolation distance equidimension parameter, so be different from conventional products.Reserving on the physical dimension chain relation based on the bigger size under the height above sea level factor, so total has been done design again.The structural design of the utility model has been taken all factors into consideration the situation of dimension chain relationship change in a word, designs to meet the structure that correction value requires.
Claims (7)
1. 40.5kV metal-clad moveable formula switchgear that is applied to altitude environment; Comprise switch cubicle; And described switch cubicle is made up of a plurality of compartments in shell and the switch cubicle and the components and parts and the Quadratic Finite Element device that are installed in the compartment, and described components and parts comprise: current transformer, voltage transformer, earthed switch, vacuum circuit-breaker, fuse, transformer, insulating part, main bus bar and branch bar, high voltage reactor, high pressure parallel single-phase capacitor; Described a plurality of compartment comprises circuit breaker cart chamber (B), bus-bar room (A), cable vault (C), relay control room (D), separates with dividing plate between a plurality of compartments; It is characterized in that: in circuit breaker cart chamber (B), guide rail is installed, confession circuit breaker cart (1) slides and works; Bus-bar room (A) lining is equipped with bus casing (8) and contact box (6), and bus casing (8) is used for fixing main bus bar and satisfies the main bus bar insulating requirements; The inside of described cable vault (C) is equipped with current transformer (3), earthed switch (5); The Quadratic Finite Element device that described relay control room (D) is equipped with relaying protection element, instrument, electrification display and primary element is monitored, controls, protected; The described electric clearance that is applied to the 40.5kV metal-clad moveable formula switchgear of altitude environment is controlled at more than or equal to 360mm; The distance to the ground of each electrified body also is more than or equal to 360mm simultaneously; The creepage distance of each components and parts is all controlled more than the 1265mm, separates with bent plate (10) between the described contact box (6).
2. the 40.5kV metal-clad moveable formula switchgear that is applied to altitude environment according to claim 1 is characterized in that: put insulating cover can not satisfying on the components and parts of electric clearance and creepage distance, to satisfy insulating requirements.
3. the 40.5kV metal-clad moveable formula switchgear that is applied to altitude environment according to claim 1; It is characterized in that: in described circuit breaker cart chamber (B), bus-bar room (A), top, cable vault (C) be provided with pressure release passage, described pressure release passage all links to each other with pressure relief device.
4. the 40.5kV metal-clad moveable formula switchgear that is applied to altitude environment according to claim 1, it is characterized in that: described circuit breaker cart chamber (B), cable vault (C) add heater respectively.
5. the 40.5kV metal-clad moveable formula switchgear that is applied to altitude environment according to claim 1, it is characterized in that: the little bus of described main bus bar and branch all adopts rectangular bus bar.
6. the 40.5kV metal-clad moveable formula switchgear that is applied to altitude environment according to claim 1 is characterized in that: set up 5 * 40mm separately in described cable vault (C)
2The ground connection copper bar.
7. the 40.5kV metal-clad moveable formula switchgear that is applied to altitude environment according to claim 1 is characterized in that: in described cable vault (C) lightning arrester is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120363467 CN202210646U (en) | 2011-09-27 | 2011-09-27 | 40.5 kV metal-armored withdrawable switching equipment applied to high altitude environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120363467 CN202210646U (en) | 2011-09-27 | 2011-09-27 | 40.5 kV metal-armored withdrawable switching equipment applied to high altitude environment |
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| Publication Number | Publication Date |
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| CN202210646U true CN202210646U (en) | 2012-05-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120363467 Expired - Fee Related CN202210646U (en) | 2011-09-27 | 2011-09-27 | 40.5 kV metal-armored withdrawable switching equipment applied to high altitude environment |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106257779A (en) * | 2016-08-19 | 2016-12-28 | 浙江上美输配电有限公司 | Indoor three-phase high-voltage switch cubicle |
| CN106410623A (en) * | 2016-08-28 | 2017-02-15 | 安徽普天电力科技有限公司 | Head wave opening and breaking type quick switch cabinet |
| CN107785807A (en) * | 2017-10-16 | 2018-03-09 | 四川电器集团股份有限公司 | A kind of switchgear integral layout |
| CN109904766A (en) * | 2019-04-12 | 2019-06-18 | 焦作华飞电子电器股份有限公司 | The comprehensive temperature and pressure stabilizing driving device of a kind of High aititude, low temperature environment electric-control system |
| CN114242450A (en) * | 2021-11-09 | 2022-03-25 | 天威保变（秦皇岛）变压器有限公司 | Static discharge process and effect verification method for large oil-immersed transformer in high-altitude area |
-
2011
- 2011-09-27 CN CN 201120363467 patent/CN202210646U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106257779A (en) * | 2016-08-19 | 2016-12-28 | 浙江上美输配电有限公司 | Indoor three-phase high-voltage switch cubicle |
| CN106410623A (en) * | 2016-08-28 | 2017-02-15 | 安徽普天电力科技有限公司 | Head wave opening and breaking type quick switch cabinet |
| CN107785807A (en) * | 2017-10-16 | 2018-03-09 | 四川电器集团股份有限公司 | A kind of switchgear integral layout |
| CN109904766A (en) * | 2019-04-12 | 2019-06-18 | 焦作华飞电子电器股份有限公司 | The comprehensive temperature and pressure stabilizing driving device of a kind of High aititude, low temperature environment electric-control system |
| CN114242450A (en) * | 2021-11-09 | 2022-03-25 | 天威保变（秦皇岛）变压器有限公司 | Static discharge process and effect verification method for large oil-immersed transformer in high-altitude area |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120502 Termination date: 20150927 |
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| EXPY | Termination of patent right or utility model |