CN202178540U - phase enclosing bus - Google Patents
phase enclosing bus Download PDFInfo
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- CN202178540U CN202178540U CN2011200641252U CN201120064125U CN202178540U CN 202178540 U CN202178540 U CN 202178540U CN 2011200641252 U CN2011200641252 U CN 2011200641252U CN 201120064125 U CN201120064125 U CN 201120064125U CN 202178540 U CN202178540 U CN 202178540U
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- enclosed bus
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Abstract
The utility model discloses an isolated phase enclosing bus which is an isolated phase enclosing bus structure or an enclosing bus structure of a plurality of isolated phases which are successively connected from beginning to end, wherein the isolated phase enclosing bus structure comprises conductors and housings; conductors of the enclosing bus structure of isolated phases successively connected from beginning to end are fixedly connected and housings thereof are also fixedly connected; the conductors and the housings of the isolated phase enclosing bus structure are in connection through support insulators which are located at joints of the enclosing bus structure of isolated phases successively connected from beginning to end. Since the support insulators are only arranged on one end of the enclosing bus structure between the conductors and the housing, the number of support insulators is reduced on the premise that the stability is guaranteed, and the number of support insulators is minimized, the number of rubber seal is minimized and possible leak points caused by rubber seal of the whole isolated phase enclosing bus is reduced.
Description
Technical field
The utility model relates to power transmission technology field, relates in particular to the power transmission and transformation system technical field.
Background technology
Electricity, modern humans society indispensable a kind of energy---electric energy.
At present, employed electric energy in our society, major part comes from all kinds of power plants (, stand), thermal power plant, hydroelectric station, nuclear power station.(this paper such as wind power plant, solar energy plant will not set forth)
Electric current must have a closed-loop path, flowing of electric energy just can be arranged, i.e. electric current.The transmission of electric energy, power plant (, stand) produces quantitative electric energy through 1. generating set---2. isolated-phase enclosed bus electric energy transmitting---3. electric energy boosts through main transformer---4. high-tension line long-distance transmissions electric energy---5. electric energy is through transformer station's step-down---6. low-voltage circuit electric energy transmitting---7. the user uses electric energy---consumer electronics ground connection (return generator neutral point as electric energy through the earth---suitable generator negative pole).
Above-mentioned 7 links, at present, the fail-safe analysis that each link equipment operation uses is following:
The 1. link-generator is the generating set that produces electric energy, through technology transfer, absorption, conversion, the raising in 30 coming year, and can long-term safety, reliability service (only needing periodic inspection).
A the 2. link-isolated-phase enclosed bus electric energy transmitting, be electric energy that generator is produced through this device transmission to transformer (boost and serve electrical network again).This equipment is made up of conductor and shell.Because isolated-phase enclosed bus (outdoor part) is in the operational environment of different temperatures and humidity for a long time and influences the sealing of shell, is easy to generate the dewfall phenomenon in the shell, it is not good enough to the insulation effect of shell conductor to occur.When dewfall arrives to a certain degree, will influence isolated-phase enclosed bus normal transmission electric energy, accident (accident conditions and reason are detailed to see next section) appears.
The 3. link-transformer is that the voltage of electric energy that generator is sent is raised to higher voltage (1000kV, 500kV; 220kV, 110kV, 750kV northwest net; The 330kV northwest net) to be fit to long-distance transmissions, the same with generating set; Through technology transfer, absorption, conversion, the raising in 30 coming year, can long-term safety, reliability service (only needing periodic inspection).
4. individual link-high-tension line promptly, is erected at the circuit of the transmission of electric energy on the high voltage iron tower, under the condition that does not have extremely special harsh weather, environment, and this equipment safe and reliable especially (only needing periodic maintenance).
5. individual link-transformer station is that the high voltage drop that electrical network transmits is arrived lower voltage, uses electric energy to be fit to different user security.At present, transformer station realizes all control automatically basically, accomplishes unattended operation, makes regular check on.It is thus clear that its advanced and reliability (only needing periodic maintenance).
6. individual link-low-voltage circuit is that the all-mains electric energy transmitting that transformer station transmits is used (only needing periodic maintenance) to the user.
7. even individual link-user is with the huge numbers of families of electric energy and the electrical equipment of unit etc.User's electrical equipment ground connection, return generator neutral point as electric current through the earth---as the generator negative pole.
This shows, in 7 links from the generating set to user, under the home condition, remove the 2. link (isolated-phase enclosed bus), each equipment can both be normally, safety, reliability service.
From the 7. individual link of 1. individual link to the, each link, any problem all can not appear in safe, the normal operation of equipment, if any one link goes wrong (breaking off as the closed-loop path), with directly influencing the requirement that the user normally uses electric energy.
Though separate unit unit isolated-phase enclosed bus equipment accident occurs and causes compressor emergency shutdown, unlikely whole seven links are broken off, and can make the electrical network gross power produce range of decrease vibration, influence normal, the safe operation of electrical network.Especially the loss that power plant itself is caused big (detailed seeing next section).
The related device of the utility model is exactly above-mentioned 2. individual link, isolated-phase enclosed bus.
Isolated-phase enclosed bus is the equipment that connection generating set and main transformer transmit a kind of electric energy transmitting of high voltage, big electric current.Isolated-phase enclosed bus equipment we can say; Being generating set plays the key effect of neck through main transformer to the electrical network electric energy transmitting, because it does not have stand-by channel, in case go wrong; With the shutdown that directly influences even cause generating set; Thus, good again generator also can't be gone out power delivery.
As stated, isolated-phase enclosed bus is when electric energy transmitting, and the requirement of its security reliability is very high, in utilization and operation, does not allow to occur any problem.
Isolated-phase enclosed bus basic structure is seen accompanying drawing 2.Isolated-phase enclosed bus is processed by metal material, and every phase (the C phase is seen accompanying drawing 1, the A view for A phase, B phase) conductor is enclosed in separately in the metal shell separately, and insulating space is arranged between the shell.
Isolated-phase enclosed bus basic structure; Its main material is a commercial-purity aluminium sheet material; Large and small (that is: the generator unit is large and small) according to institute's transmission current; The cylinder that is made into different-diameter is as conductor, and the conductor sheet metal thickness is generally between 8mm～16mm, and diameter is generally between Φ 280mm～Φ 1000mm.For guaranteeing that conductor can the safe transport electric energy and the personnel and the safety of miscellaneous equipment on every side, conductor is got up by the housing shroud of the larger diameter of the commercial-purity aluminium board making of material equally.Adopt the column support type insulator to support between conductor and the shell, the insulator material is two kinds of porcelain or DMC (unsaturated polyester (UP) short glass fiber composite material).See accompanying drawing 4 and accompanying drawing 5.
Owing to have the space of certain sealing between shell and the conductor, in the space of this sealing humidity, temperature, cleannes had relatively high expectations.At present, the problem that often occurs is insulator surface and inner surface of outer cover dewfall phenomenon, in case dewfall creepage, the accidents such as flashover, puncture of discharging will occur to a certain degree.Cause compressor emergency shutdown in case accident occurs,, do not include indirect loss, the direct economic loss in power plant itself is generally (unit varies in size, and loss is different) more than the RMB circles up to a million the system stable operation that directly influences electrical network.
So the dehumidifying anti-condensation of isolated-phase enclosed bus enclosure at present is the key that can this equipment the safe transmission electric energy.
The dewfall of isolated-phase enclosed bus enclosure is the poor seal of device housings own, wet gas in the environment is entered in the shell cause.
The reason of isolated-phase enclosed bus enclosure dewfall, the isolated-phase enclosed bus operating state is divided indoor, outdoor.Indoor isolated-phase enclosed bus in the A row wall, in steam turbine building, is in indoor better environment, and temperature, humidity change lessly, and the shell rubber seal uses sealing effectiveness better for a long time, and gas leakage changes little, so dewfall seldom.Outdoor isolated-phase enclosed bus beyond the A row wall, is in dust storm, sunshine, sleet, day and night temperature, humidity variation environment greatly for a long time; After causing the shell rubber seal to use a period of time, rubber seal is aging, silication, and isolated-phase enclosed bus equipment is originally as aluminium material; Big (other metals relatively) expand with heat and contract with cold during difference variation; It is bigger that its sealing is changed, and each rubber seal gas leak phenomenon progressively becomes greatly, so the dewfall of being easier to.
The isolated-phase enclosed bus enclosure is prone to the position of dewfall; Be outdoor isolated-phase enclosed bus enclosure; General normal occurring in: 1. isolated-phase enclosed bus and station-service (public) transformer, main transformer junction; Disc insulator lower position (do not have dehumidifying anti-condensation equipment here, be commonly called as two) no matter the position is seen accompanying drawing 1 for details; 2. disc insulator top position (the terminal relatively extreme lower position of pressure-fired ventilating control part sees accompanying drawing 2 and accompanying drawing 3 for details).
At present, the method for isolated-phase enclosed bus dehumidifying anti-condensation:
1. pressure-fired aerating device; Its principle is to charge into the isolated-phase enclosed bus enclosure with filtering also dry clean air; The air pressure of enclosure is encircled relatively press the malleation that keeps certain (to be generally relative ring and to press 300Pa～2500Pa); Prevent that the humid air in the environment from getting in the shell, avoid dewfall occurring and influence the normal transmission of electric energy of conductor.But, because outdoor isolated-phase enclosed bus shell changes work under the state greatly at summer in winter, day and night temperature for a long time, isolated-phase enclosed bus shell intensification air pressure inside is boosted, make gas leak in the shell.Night, environment temperature reduction caused the step-down of isolated-phase enclosed bus shell cooling air pressure inside, made wet gas get into enclosure.Generally about 6 months～12 months; Sclerosis, be full of cracks appear in outdoor rubber seal everywhere, cause the phenomenon of blow-by gas leakage, with the passage of time; Pressure-fired occurs and charge into the interior dry gas of shell and be less than the gas that spills, and can not keep the pressure of enclosure to encircle the malleation of pressure relatively.Wet gas runs up to certain Cheng Du, under the cryogenic conditions that is fit to, the dewfall phenomenon occurs, causes taking place faults such as creepage, flashover, discharge, short circuit, causes the accident of compressor emergency shutdown.
The effect on moisture extraction conclusion: make-up gas is quantitative, spills gas variable, and air leakage progressively increases and causes inefficacy.
2. electric heater unit, its principle are near location arrangements electric heaters (as the electric furnace) insulator in the enclosure, through the heating near the air insulator, prevent the insulator surface dewfall, reach the condition that generator starts generating.But this kind heating anti-condensation mode can not be displaced the wet gas in the shell outside the shell; Only suitable generator opens the damp anti-condensation effect of driving on machine front casing inner insulator surface; Can not use after the generator normal power generation, because, this electrical heating method; Can cause conductor to be heated intensification simultaneously, conductor itself influences the conductor electric energy transmitting because of overheated increase resistance effect occur.
The effect on moisture extraction conclusion: it is effectively preceding to open machine, can not use during operation, spills gas variable, the problem that air leakage increases.
3. hot blast care device, principle, effect, effect, the same electric heater unit of method.It is not all heating source is hot blast, is not electric heating.
The effect on moisture extraction conclusion: it is effectively preceding to open machine, can not use during operation, spills gas variable, the problem that air leakage increases.
4. circulation drier, its principle are that the air in the shell is formed closed loop, through drying device automatically control carry out circulating dehumidification.Because the recyclegas flow is quantitative, and the humid air that gets in the shell is progressively increasing; Occur wet gas circulation in more than shell at last, participate in circulation in the lump, cause effect on moisture extraction long again slowly together with the humid air around the shell external environment; And effect progressively weakens, and loses efficacy at last.
The effect conclusion: recyclegas is quantitative, spills gas variable, and air leakage progressively increases and causes inefficacy.
5. multi-functional automatic removal moisture drying system is that above 4 kinds of functions are used jointly, and concentrating automatically, control dehumidifies.Because, more than each device dehumidifying all can not use simultaneously, its effect is exactly, more convenient in the selection, each function can be used separately, use also can interlock.But excellent, the shortcoming of each function all exist.
Effect conclusion: on the specific time point, as using wherein a kind of device.Spill gas variable, air leakage progressively increases and causes inefficacy.
In a word, above the whole bag of tricks is all cured the symptoms, not the disease.All do not guaranteeing on the isolated-phase enclosed bus safe transport electric energy basis; On structure, reduce rubber seal point position as much as possible; Let the wet gas in the environment not have in the least possible entering shell of conditioned disjunction, and fundamentally solve the problem of isolated-phase enclosed bus enclosure dewfall.That is, above-mentioned dehumanization method, all how consideration solves sealing, gas leakage problem (reducing the rubber seal position), seals worse and worse, and dehumidification equipment is done more complicated and more complicated, and starting point is the problem that solves variate with definite value.So effect is relatively poor.
The dehumidification mode of pressure-fired aerating device, circulating dehumidification device, multi-functional automatic dehydrating unit etc. is with simple question; Do complicated processing; Because the automatic control system of these several kinds of equipment is more complicated all, and control system own and air supply system also often go wrong.
The utility model; Be exactly at first on structure; Reduce rubber sealing structure design (because of electric energy transmitting structural behaviour and repair and maintenance must just adopt rubber seal) as far as possible, make the possibility of the least possible entering enclosure of wet gas, the less wet gas of this part entering enclosure; Then adopt the simplest, practical, directly perceived, reliable, otherwise effective technique, and operation is convenient again, simple, method solves reliably.
Summary of the invention
To above-mentioned technical problem, the purpose of the utility model is to propose a kind of novel isolated-phase enclosed bus, solves the dewfall hidden danger of the outdoor part of above-mentioned isolated-phase enclosed bus.Through adopting the technical scheme of the utility model, can save raw material, reduce the workload in the manufacture process, effect on moisture extraction is more effectively reliable, and plant maintenance has more specific aim, and easy to be flexible, convenient transportation is quick.
For reaching this purpose, the utility model adopts following technical scheme:
A kind of isolated-phase enclosed bus; It is an isolated-phase enclosed bus structural member or comprises the isolated-phase enclosed bus structural member that several head and the tail connect successively; Wherein, Said isolated-phase enclosed bus structural member comprises conductor and shell, and the conductor of the isolated-phase enclosed bus structural member that head and the tail connect successively is fixed together, and the shell of the isolated-phase enclosed bus structural member that head and the tail connect successively is fixed together; Be connected through supporting insulator between the shell of the conductor of said isolated-phase enclosed bus structural member and said isolated-phase enclosed bus structural member, said insulator is positioned at the junction of the isolated-phase enclosed bus structural member that said head and the tail connect successively.
The supporting insulator quantity that is positioned at said isolated-phase enclosed bus structural member end is 2, and said two supporting insulators are arranged perpendicular to each 60 degree of both sides angle.
The conductor of the isolated-phase enclosed bus structural member that connects successively from beginning to end is to be fixed together with the mode of welding through the axis tile that is arranged on the conductor, and the shell of the isolated-phase enclosed bus structural member that head and the tail connect successively is to be fixed together with the mode of welding through the axis tile up and down that is arranged on the shell.
Said isolated-phase enclosed bus and station transformer, main transformer junction connect.
The dehumidifying anti-condensation mode of said isolated-phase enclosed bus is the mode that electric heating combines with dehydrating breather.
Said dehydrating breather comprises housing, and said housing is a transparent organic glass, dress silicon particle in the said housing.
Said dehydrating breather external form is Φ 250～350mm, length 300～400mm, in adorn 3～5 kilograms of silicon particles.
Described isolated-phase enclosed bus comprises indoor isolated-phase enclosed bus and outdoor isolated-phase enclosed bus; Each supporting insulator place of said indoor isolated-phase enclosed bus is provided with a dehydrating breather; The supporting insulator place of said outdoor isolated-phase enclosed bus, and said outdoor isolated-phase enclosed bus with station transformer, main transformer junction installing dehydrating breather.
Adopt the technical scheme of the utility model, can obtain following technique effect:
1, raw material, the use of parts such as the utility model supporting insulator and base is 1/3rd of a prior art, saves 2/3rds.Then, relative parts energy-conservation 2/3rds such as prior art raw material.
2, manufacturing process, isolated-phase enclosed bus shell are non-ferrous metal aluminium, and the shell perforate generally need be adopted the plasma cutting; Be welded as argon arc welding (inert gas shielding) welding; The utility model be plasma shell perforate cutting, argon arc welding welding and artificial assembling etc. workload 1/3rd (the utility model is a semicircle, and plate is less, can be before being rolled into semicircle; Impact style is adopted in the shell perforate, its effect than the plasma cutting not only soon, not only good but also economical).Then, prior art manual work and consumable material (argon gas, welding wire etc.) save 2/3rds relatively.
3, effect on moisture extraction, because sealing effectiveness is greatly improved, the dehumidifying that isolated-phase enclosed bus equipment is in operation is protected, and has more specific aim, simple, directly perceived, and dehumidifying is more reliable, effective, and equipment operation is safer.
4, the maintenance of equipment, the utility model have more specific aim, directly perceived, simple, flexible, convenient and more economical than prior art on safeguarding.
5, branch's isolated-phase enclosed bus is generally shorter, is generally not water (removing extreme lower position) of vertical layout, and there is not dewfall ponding problem in branch's shell, and the supporting insulator arrangement can not adopt the utility model.Like special trend, when horizontal arrangement was longer, horizontal component can adopt the utility model.
6, transportation (seeing accompanying drawing 6 and accompanying drawing 7 for details)
1. the transportation of prior art isolated-phase enclosed bus is considered to jolt etc. and is caused the influence to supporting insulator and shell circularity, and three fixed supports are respectively installed at two ends between shell and conductor.The transportation of the utility model isolated-phase enclosed bus, the same with prior art between shell and conductor two ends respectively install three fixed supports, jolt etc. with solution and cause influence shell circularity, transportation is supported identical with prior art.
2. the utility model isolated-phase enclosed bus supporting insulator adopts packing (assembling during on-the-spot the installation) transportation separately.Because of supporting insulator is that Bales Off dress and volume are less, visual automobile gap entrucking during transportation is not so can increase cost of transportation.
7, the on-the-spot installation (seeing accompanying drawing 4 and accompanying drawing 5 for details)
1. the housing supports of the utility model isolated-phase enclosed bus can adopt the original position form, also can adopt the channel-section steel anchor ear is installed in form on the shell axis tile (this scheme conductor support bearing is stressed better).
2. the on-the-spot installation steps of prior art isolated-phase enclosed bus are: segmented in-position, welding conductors bag watt is removed and is supported, welding shell axis tile.The on-the-spot installation steps of the utility model isolated-phase enclosed bus are:
(1) employing is installed in form on the shell axis tile with the channel-section steel anchor ear: axis tile is in place under the shell, segmented in-position, and axis tile under the welding shell, welding conductors bag watt (welding axis tile under the conductor earlier), the Installation and Debugging of conductor supporting insulator, dismounting is supported, axis tile on the welding shell.
(2) adopt the channel-section steel anchor ear is installed in the original position form: segmented in-position, welding conductors bag watt, axis tile under the welding shell, the Installation and Debugging of conductor supporting insulator are removed and are supported, axis tile on the welding shell.
Field erected difference is the utility model with the prior art isolated-phase enclosed bus: step is the same basically, and order is different, just increases by one, the Installation and Debugging of conductor supporting insulator.
Description of drawings
Accompanying drawing 1 is the isolated-phase enclosed bus basic block diagram of prior art;
Accompanying drawing 2 is the isolated-phase enclosed bus location of accident sketch map of prior art;
Accompanying drawing 3 is the isolated-phase enclosed bus location of accident sketch map of prior art;
Accompanying drawing 4 is a prior art isolated-phase enclosed bus structural representation;
Accompanying drawing 5 is the isolated-phase enclosed bus structural representation of the utility model embodiment;
Accompanying drawing 6 is the supportive conductors transport structure sketch map of prior art;
Accompanying drawing 7 is the supportive conductors transport structure sketch map of the utility model embodiment;
Accompanying drawing 8 is the main transformer junction dehydrating breather and the electric heating layout plan of the utility model embodiment;
Accompanying drawing 9 is that the factory of the utility model embodiment becomes junction dehydrating breather and electric heating layout plan;
Accompanying drawing 10 is the supporting insulator place dehydrating breather and the electric heating layout plan of the utility model embodiment.
1. generators among the figure, 2. indoor major loop isolated-phase enclosed bus, 3.A row wall, 4. pressure-fired aerating device; 5. outdoor major loop isolated-phase enclosed bus, 6. duplexure isolated-phase enclosed bus, 7. station transformer, 8. main transformer; 9. duplexure disc insulator, 10. duplexure shell rubber telescopic, 11. major loop disc insulators, 12. major loop shell rubber telescopics; 13. major loop isolated-phase enclosed bus segmentation A, 14. supporting insulators, 15. housing supports channel-section steel anchor ears, 16. shells connect axis tile; 17. conductor connects axis tile, 18. major loop isolated-phase enclosed bus segmentation B, 19. major loop isolated-phase enclosed bus conductor conductors; 20. fixed support, 21. electric heaters, 22. dehydrating breathers.
Embodiment
Further specify the technical scheme of the utility model below in conjunction with accompanying drawing and through embodiment.
The transmission of electric energy, power plant (, stand) produces quantitative electric energy through 1. generating set---2. isolated-phase enclosed bus electric energy transmitting---3. electric energy boosts through main transformer---4. high-tension line long-distance transmissions electric energy---5. electric energy is through transformer station's step-down---6. low-voltage circuit electric energy transmitting---7. the user uses electric energy---consumer electronics ground connection (return generator neutral point as electric energy through the earth---suitable generator negative pole).
Shown in accompanying drawing 1, this figure is domestic conventional 200MW, 300MW and following generating set isolated-phase enclosed bus basic structure.(the single-row change of the many employings of present domestic 600MW and above generating set; Be every be a separated transformer mutually, arranging has increased main transformer triangle loop, the utility model is suitable fully to this part); Generating set produces electric energy; Electric energy is transferred to the main transformer low-pressure side through isolated-phase enclosed bus, and boosting through main transformer is transferred high-voltage fence, carries out long-distance transmissions.
Isolated-phase enclosed bus divides three-phase, the A phase, and the B phase, C phase (accompanying drawing 1 of meeting each other, A view), conductor is enclosed in separately in the metal shell separately, and insulating space (meet each other accompanying drawing 4 and accompanying drawing 5) is arranged between conductor and the shell.Conductor is enclosed in the shell of ground connection, and shell plays shielding and protective effect to conductor.
Shown in accompanying drawing 2 and 3, isolated-phase enclosed bus divides two parts, and the major loop isolated-phase enclosed bus arrives electrical network to huge numbers of families with the most of power delivery of generating set; Branch's isolated-phase enclosed bus with defeated this power plant of getting back to of generating set sub-fraction electric energy as station-service (personal, the illumination of generating set and subsidiary engine equipment etc.).
This figure is the multiple location drawing of outdoor isolated-phase enclosed bus accident.
1. sequence number 9 branch's benzvalene form sealing insulators and sequence number 11 major loops sealing disc insulator top position is the outdoor extreme lower position of the controllable a whole set of isolated-phase enclosed bus of pressure-fired, and other position isolated-phase enclosed bus temperature is lower relatively, humidity is bigger for this two positions.In case so after pressure-fired lost efficacy, dewfall is to a certain degree, accidents such as creepage, flashover, short circuit just appear.
2. sequence number 9 branch benzvalene form sealing insulators below to station transformer and sequence number 11 major loops sealing disc insulator below to the locational space of main transformer, the locational space of not controlling for pressure-fired.This position is isolated-phase enclosed bus and station transformer, main transformer link position.Owing to be the connection of two equipment, so the space of position, no matter isolated-phase enclosed bus equipment and transformer equipment all do not provide anti-condensation dehumidifying measure, are commonly called as two the position.Therefore, this position, two places condensation trouble often occurs because the sealing problem of sequence number 10 branch's rubber sealing boots and sequence number 12 major loop rubber sealing boots is arranged, and dewfall arrives to a certain degree, accidents such as creepage, flashover, short circuit just occur.
Shown in accompanying drawing 4, prior art is that supporting insulator is arranged in two segmentations.Shown in accompanying drawing 5, the utility model is that supporting insulator is arranged on two segmentation junctions.
Prior art is that the housing supports channel-section steel anchor ear with isolated-phase enclosed bus is arranged in the segmentation.The utility model can adopt the original position form, also can adopt housing supports channel-section steel anchor ear is installed in form on the shell axis tile (this scheme conductor support bearing is stressed better).
With shown in the accompanying drawing 7, the isolated-phase enclosed bus segmentation according to the appointed condition and the transportation condition of producer self, is selected 6～12 meters of length like accompanying drawing 6.
Shown in accompanying drawing 8, accompanying drawing 9 and accompanying drawing 10, the utility model anti-condensation mode is: before 1. opening machine, electric heating adds the dehydrating breather mode; 2. in service, the dehydrating breather mode.
1. with 6 supports in 2 positions of the every place of supporting insulator, change to 1: 2 support in every place.(seeing accompanying drawing 4 and accompanying drawing 5 for details)
2. at A row wall displacement (indoor, outdoor divider wall place) and with station-service (public) transformer, main transformer junction isolated-phase enclosed bus disc insulator is not set.(seeing accompanying drawing 2 and accompanying drawing 3 for details)
3. adopt dehydrating breather to substitute the pressure-fired aerating device
1. the supporting insulator place of isolated-phase enclosed bus appropriate location (near A row wall place, temperature is relatively low in the shell here, is prone to dewfall) indoors, dehydrating breather of every phase (A phase, B phase, C phase) installing;
2. isolated-phase enclosed bus three-phase (A phase out of doors; The B phase; The C phase) every group of supporting insulator place and isolated-phase enclosed bus and station-service (public) transformer, main transformer junction, each installs one of dehydrating breather (when outdoor isolated-phase enclosed bus is longer, can per two groups of supporting insulators installing dehydrating breather one).
Details are as follows for the utility model characteristics:
1. with 6 supports in 2 positions of the every place of supporting insulator, change to 1: 2 support in every place.
At present; The fixed form of supporting insulator is that shell is fixed basically; Shell and conductor are round tube shape, and conductor dbus is crossed the supporting insulator that 120 degree divide equally layout and is fixed on shell circle center, between conductor outer surface and the supporting insulator; Adopt the moving contact of point type, to solve conductor because of the cold and hot axial deformation that causes conductor to expand with heat and contract with cold.Because of there is the possibility of damaging in supporting insulator, must satisfy its convertibility.So supporting insulator another side (base) is fixed by bolts on the shell wall, bolt is used in perforate on the shell wall, and supporting insulator is detachably changed.So, each supporting insulator must be provided with 1 rubber seal point, and each position 120 degree of fixed conductor are divided equally; Then be 3 rubber seal points; Factory makes isolated-phase enclosed bus, considers transportation, and general length is less than 8 meters/section; Two ends are established 120 degree and are divided equally between every section conductor and the shell, totally 6 supporting insulator/sections.So per 8 meters sections of isolated-phase enclosed bus/single-phase have 6 rubber seal points, generator outlet is three-phase (A phase, B phase, a C phase), that is, the per 8 meters/three-phase of isolated-phase enclosed bus has 18 rubber seal points.Generally from the generator outlet terminal to the main transformer, isolated-phase enclosed bus length arrange be generally 40～100/ three-phase rice (unit is also arranged more than 100, as water power along the dam layout etc.).This shows that because of supporting insulator is fixed, there are 90～225 rubber seal points at least in every cover isolated-phase enclosed bus, these points all exist good sealing effect and poor certainty.These rubber seal points; After operation a period of time (6～12 months); There is rubber sclerosis, the be full of cracks phenomenon that leaks air, adds hardening sealant, the be full of cracks of isolated-phase enclosed bus and each end points of miscellaneous equipment junction, and cause the above-mentioned various anti-condensation devices inefficacies of a whole set of isolated-phase enclosed bus.
The utility model is reduced to 1/3rd with above-mentioned 90～225 rubber seal points exactly.
The utility model project organization, principle and former project organization, principle contrast as follows: (seeing accompanying drawing 4 and accompanying drawing 5 for details)
Supporting insulator between isolated-phase enclosed bus conductor and the shell; Every group of supporting location of former design divided equally 3 by 120 degree; Each one group at every section 8 meters two ends, between per two sections 8 meters, axis tile is welded to connect about the shell that adopts warp-wise at the scene and the conductor; Every phase axis tile both sides are provided with 3 supporting insulators, totally 6.The utility model is designed to; 8 meters belows of every phase axis tile is provided with two supporting insulators; Supporting insulator is for arranging (seeing accompanying drawing 4 and accompanying drawing 5 for details) perpendicular to each 60 degree of both sides angle; Remove the top position supporting insulator (former 3 be arranged in installation after, during actual motion used, the supporting insulator of uppermost position in fig-ure was no supporting role).Conductor is supported and centering by two of lower positions fully.Therefore, the utility model is the same with former design on the supportive conductors operation result of use.Thus, a whole set of isolated-phase enclosed bus possibly leaked gas because of the rubber seal of supporting insulator and reduce 2/3rds.
2. at isolated-phase enclosed bus and station-service (public) transformer, main transformer junction disc insulator is not set.
The prior art isolated-phase enclosed bus is because of there being the pressure-fired inflation; So becoming junctions (isolated-phase enclosed bus side) such as (public), outdoor isolated-phase enclosed bus and main transformer, factory be designed with the disc insulator sealing; Cause isolated-phase enclosed bus and station-service (public) transformer, main transformer junction thus; No anti-condensation dehumidifying measure (no matter being commonly called as two position) causes this junction the dewfall accident often to occur.The utility model design is that these positions are not provided with disc insulator, and junctions such as isolated-phase enclosed bus and station-service (public) transformer, main transformer are connected, and adopt dehydrating breather anti-condensation and dehumidifying in the lump.(seeing accompanying drawing 8, accompanying drawing 9 and accompanying drawing 10 for details)
3. adopt dehydrating breather to substitute the pressure-fired aerating device
1. indoors the every phase in supporting insulator place of the moderate position of isolated-phase enclosed bus (A phase, B phase, C phase) is installed a dehydrating breather;
2. dehydrating breather is installed in every group of (can be more per two groups when unit is longer) supporting insulator place of isolated-phase enclosed bus three-phase (A phase, B phase, C phase) and isolated-phase enclosed bus and station-service (public) transformer, main transformer junction out of doors; (seeing accompanying drawing 8, accompanying drawing 9 and accompanying drawing 10 for details)
The dehumidifying anti-condensation mode of the utility model:
Isolated-phase enclosed bus anti-condensation dehumidifying has only two stages, that is, the machine that opens is preceding and in service.
1. before opening machine, dehydrating breather adds Electric heating (electric heating is subsequent use).As previously mentioned, the electric heating dehumidifying time is short, and effect is fast.But its shortcoming is: (1) power consumption is big; (2) improving the insulator surface class of insulation such as porcelain vase, is the tide that becomes, and does not dehumidify.The dehydrating breather mode dehumidifies, not loss electric energy, and can be with reaching the effect that improves insulation after the wet gas absorption.If unit be badly in need of to start, and can before opening machine, adopt Electric heating, and insulator surfaces such as porcelain vase are dried the class of insulation of can generating electricity, withdraw from Electric heating after opening machine.
2. in service, the dehydrating breather mode.Indoor summer in winter, day and night temperature change less, do not have the phenomenon (being generally the normal aging cycle) of rubber seal sclerosis, be full of cracks etc. basically, so the rubber seal effect is better, every phase can be provided with 1 dehydrating breather.Outdoor every phase 8 meters (following axis tile junction) and isolated-phase enclosed bus and miscellaneous equipment junction be every to be provided with 1 dehydrating breather mutually.Accomplish that thus all humid airs of outdoor isolated-phase enclosed bus possibly be provided with a dehydrating breather with regard near position by leakage point, thereby accomplish to be adsorbed in the dehydrating breather when wet gas has just got into shell.Because; The utility model has reduced a lot of gas leakage link point (prior art 1/3rd), makes the wet gas that gets in the shell less, uses the dehydrating breather mode to dehumidify; Its advantage is direct, effective, directly perceived, replacing convenient (can in unit operation, operate).Dehydrating breather life cycle is (indoor longer with the drier zone time of environment) about 6～12 months, satisfies the maintenance cycle of unit light maintenance or overhaul fully.
The outdoor isolated-phase enclosed bus of the utility model adopts the largest benefit of dehydrating breather dehumidifying to be, outdoor part, and a position possibly leak gas per two (single-phase 8 meters); Moisture absorption nearby; In the unit operation, make regular check on the moisture sorption effect of each dehydrating breather, as find certain dehydrating breather moisture absorption very fast (variable color of moisture absorption silica gel); Explain that then there is the possibility of gas leakage in its dehydrating breather two supporting insulators nearby; Overhaul recently at unit (light maintenance, in repair, overhaul) time, check that targetedly repairing these two supporting insulators sealings get final product (or changing rubber seal etc.), and need not carry out the inspection of outdoor whole supporting insulators.Thereby significantly reduced the repair and maintenance workload.
Adopt the utility model to substitute the pressure-fired aerating device to generating set and carry out anti-condensation dehumidifying modification scheme
1. the generating set that has generated electricity when the pressure-fired aerating device is in failure state, carries out indoor isolated-phase enclosed bus part to these units, whenever installs the dehumidifying of dehydrating breather mutually and transforms.To solve the dewfall hidden danger of indoor isolated-phase enclosed bus.
2. the generating set that has generated electricity; (establishing a dehydrating breather everywhere for per two sections when outdoor part is longer) transformed in dehydrating breather dehumidifying of installing between two groups of supporting insulators of outdoor every phase; Isolated-phase enclosed bus and station-service (public) transformer, main transformer junction (do not remove like disc insulator, every in this top position install a dehydrating breather dehumidifying mutually additional) install a dehydrating breather transformation additional.To solve the dewfall hidden danger of outdoor isolated-phase enclosed bus.
Dehydrating breather basic structure, housing are transparent organic glass (look that certain distance both can be observed hygroscopic material becomes), and (each dehydrating breather can be adorned 3～5 kilograms of silicon particles, and external form is Φ 250～350mm, length 300～400mm) in the silicon particle moisture absorption of interior dress capacity.(seeing accompanying drawing 8, accompanying drawing 9 and accompanying drawing 10 for details)
Scheme one:
With the manufacturer of an isolated-phase enclosed bus, in the project engineering that it has been signed, and the duration allows, power plant (demanding party) accepts to cooperate under the situation of the utility model.Product design, production, installation, trial run 1 year, all the cycles are 2～3 years.
Scheme two:
Look for new projects, cooperate with power plant and Electric Power Design Institute, in its project, adopt the utility model, product calls for bid, designs, produces, installs, tried out 1 year, and whole cycles are 3～4 years.
Scheme three:
At present, the domestic generating set that has at present generated electricity more than a year, pressure-fired aerating device major part all is in the input state of stagnating.Can carry out outdoor part key point position and isolated-phase enclosed bus and station-service (public) transformer, main transformer junction to these units, adopt and install the dehydrating breather dehumidifying additional and transform.To solve the dewfall hidden danger at these positions.
The above; Be merely the preferable embodiment of the utility model; But the protection range of the utility model is not limited thereto; Anyly be familiar with this technological people in the technical scope that the utility model disclosed, the variation that can expect easily or replacement all should be encompassed within the protection range of the utility model.Therefore, the protection range of the utility model should be as the criterion with the protection range of claim.
Claims (6)
1. isolated-phase enclosed bus, it is an isolated-phase enclosed bus structural member or comprises the isolated-phase enclosed bus structural member that several head and the tail connect successively, wherein,
Said isolated-phase enclosed bus structural member comprises conductor and shell,
The conductor of the isolated-phase enclosed bus structural member that head and the tail connect successively is fixed together, and the shell of the isolated-phase enclosed bus structural member that head and the tail connect successively is fixed together,
Be connected through supporting insulator between the shell of the conductor of said isolated-phase enclosed bus structural member and said isolated-phase enclosed bus structural member, it is characterized in that,
Said insulator is positioned at the junction of the isolated-phase enclosed bus structural member that said head and the tail connect successively.
2. isolated-phase enclosed bus according to claim 1 is characterized in that, the supporting insulator quantity that is positioned at said isolated-phase enclosed bus structural member junction is 2, and said two supporting insulators are arranged perpendicular to each 60 degree of both sides angle.
3. isolated-phase enclosed bus according to claim 1 and 2 is characterized in that, the dehumidifying anti-condensation mode of said isolated-phase enclosed bus is the mode that electric heating combines with dehydrating breather.
4. isolated-phase enclosed bus according to claim 3 is characterized in that said dehydrating breather comprises housing, and said housing is a transparent organic glass, dress silicon particle in the said housing.
5. isolated-phase enclosed bus according to claim 3; It is characterized in that; Described isolated-phase enclosed bus comprises indoor isolated-phase enclosed bus and outdoor isolated-phase enclosed bus; The supporting insulator place of said indoor isolated-phase enclosed bus is provided with dehydrating breather, each supporting insulator place of said outdoor isolated-phase enclosed bus, and said outdoor isolated-phase enclosed bus and station transformer, main transformer junction installing dehydrating breather.
6. isolated-phase enclosed bus according to claim 4; It is characterized in that; Described isolated-phase enclosed bus comprises indoor isolated-phase enclosed bus and produces outer isolated-phase enclosed bus; The supporting insulator place of said indoor isolated-phase enclosed bus is provided with dehydrating breather, each supporting insulator place of said outdoor isolated-phase enclosed bus, and said outdoor isolated-phase enclosed bus and station transformer, main transformer junction installing dehydrating breather.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200641252U CN202178540U (en) | 2011-03-14 | 2011-03-14 | phase enclosing bus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200641252U CN202178540U (en) | 2011-03-14 | 2011-03-14 | phase enclosing bus |
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| CN202178540U true CN202178540U (en) | 2012-03-28 |
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| CN2011200641252U Expired - Fee Related CN202178540U (en) | 2011-03-14 | 2011-03-14 | phase enclosing bus |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102790365A (en) * | 2012-07-30 | 2012-11-21 | 江苏巴斯威节能科技有限公司 | Full connection type main conductor full-casting phase isolated bus and forming method thereof |
| CN103337820A (en) * | 2013-06-22 | 2013-10-02 | 国家电网公司 | High-voltage bus duct with intelligent dehumidification function |
| CN105006791A (en) * | 2015-07-23 | 2015-10-28 | 长江勘测规划设计研究有限责任公司 | Thermal equilibrium temperature-difference control method based on natural hot-pressing of long vertical enclosed busbar |
| WO2016082042A1 (en) * | 2014-11-26 | 2016-06-02 | Mikhail Sotnikov | High voltage disconnection telescopic switches isolated by air for isolated-phase bus |
| CN107785839A (en) * | 2016-08-27 | 2018-03-09 | 江苏德驰电气有限公司 | A kind of high current isolated-phase enclosed bus |
| CN110797820A (en) * | 2019-10-23 | 2020-02-14 | 山东达驰阿尔发电气有限公司 | Manufacturing method of isolated-phase enclosed bus conductor holding tile |
| CN110829328A (en) * | 2019-11-20 | 2020-02-21 | 中国电建集团河南工程有限公司 | Construction method for installing phase modulator outlet phase-isolated enclosed bus |
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- 2011-03-14 CN CN2011200641252U patent/CN202178540U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102790365A (en) * | 2012-07-30 | 2012-11-21 | 江苏巴斯威节能科技有限公司 | Full connection type main conductor full-casting phase isolated bus and forming method thereof |
| CN102790365B (en) * | 2012-07-30 | 2016-03-09 | 江苏巴斯威节能科技有限公司 | Fully connecting leading body pours into a mould phaseisolated bus and forming method thereof entirely |
| CN103337820A (en) * | 2013-06-22 | 2013-10-02 | 国家电网公司 | High-voltage bus duct with intelligent dehumidification function |
| WO2016082042A1 (en) * | 2014-11-26 | 2016-06-02 | Mikhail Sotnikov | High voltage disconnection telescopic switches isolated by air for isolated-phase bus |
| CN105006791A (en) * | 2015-07-23 | 2015-10-28 | 长江勘测规划设计研究有限责任公司 | Thermal equilibrium temperature-difference control method based on natural hot-pressing of long vertical enclosed busbar |
| CN107785839A (en) * | 2016-08-27 | 2018-03-09 | 江苏德驰电气有限公司 | A kind of high current isolated-phase enclosed bus |
| CN110797820A (en) * | 2019-10-23 | 2020-02-14 | 山东达驰阿尔发电气有限公司 | Manufacturing method of isolated-phase enclosed bus conductor holding tile |
| CN110829328A (en) * | 2019-11-20 | 2020-02-21 | 中国电建集团河南工程有限公司 | Construction method for installing phase modulator outlet phase-isolated enclosed bus |
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Legal Events
| Date | Code | Title | Description |
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| 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: 20120328 Termination date: 20150314 |
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| EXPY | Termination of patent right or utility model |