CN104600610B - Construction method for prefabricated substation - Google Patents
Construction method for prefabricated substation Download PDFInfo
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- CN104600610B CN104600610B CN201410285867.6A CN201410285867A CN104600610B CN 104600610 B CN104600610 B CN 104600610B CN 201410285867 A CN201410285867 A CN 201410285867A CN 104600610 B CN104600610 B CN 104600610B
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B3/00—Apparatus specially adapted for the manufacture, assembly, or maintenance of boards or switchgear
Abstract
The invention discloses a construction method for prefabricated substation. The construction method for prefabricated substation comprises the following steps: selecting the devices for the prefabricated substation, building, detecting the stress safety for prefabricated substation box body, and building the prefabricated substation under high altitude and high earthquake intensity. The construction method for prefabricated substation is used for having related design and building researching for the prefabricated substation under different environments and has very realistic guiding significance for building the prefabricated substation under different environments, reducing the consumption and occupation of the resource, reducing the impact to the environment and raising the building quality.
Description
Technical field
The present invention relates to a kind of pre-assembled formula transformer station technical field.
Background technology
Electrical network, as the important infrastructure in city, is the important component part of overall city planning development, with its people
Economic and social fast development, the whole society is increasing to the demand of electric power energy.Perfect, state with state's laws regulation
People's economy and the fast development of society, citizen's troxerutine tabtets strengthen continuous, and the resource such as urban land, space is more and more rare,
City is also improving constantly to environmental requirements such as the noise during construction of transformer substation, dust, mud.With Yunnan Province " bridgehead "
Strategy and " going up a hill in cities and towns " policy enforcement, future Yunnan inside the province each urban planning will develop to periphery mountain region, transformer station
Site Selection is inevitably faced close together with urban planning region, and Land Demand is more nervous, and orographic condition is poor,
Periphery uncontrollable factor increases, the problems such as higher to power supply reliability requirement.Therefore, when Electric Power Network Planning is built, both often face
Social development to be met needs to build high-quality transformer station to ensure power supply reliability, meets again and accounts for soil less, as far as possible not
The contradiction that nearby residents living environment, urban planning are impacted.Above-mentioned contradiction frequently results in the site of transformer station, circuit leads to
Implementing of road is further difficult, and construction period is larger due to disturbing to external world, is often subject to extraneous factor restriction, duration, engineering matter
Amount, building cost control are more difficult.
Because traditional transformer station is various electrical equipments to transport to after civil engineering scene again carry out installation and debugging, by
In using cast-in-situ steel reinforced concrete frame structure, masonry filler wall, in-site installation electrical equipment, joint connection in site equipment wire etc. is built
If pattern.Because above-mentioned pattern is in construction, stress builds needs job mix concrete moulding by casting, live noise during construction
Larger, dust is more, and the engineering time is longer, and with the requirement to city look and feel for the urban development and nearby residents troxerutine tabtets
Improve, above-mentioned Construction Mode is easily restricted by extraneous factor, and construction period uncontrollable factor is more.Further, since employing existing
Field casting and constructing, the form of construction work such as in-site installation electrical equipment, live line, execution conditions are restricted by field condition, its quality
Control blind spot is more, and quality control precision is poor, and construction material is difficult to recycle, and wastes more.Therefore, in the long run,
Coordinate difficulty with electrical network project construction to increase, extraneous restraining factors increase, such as according to current construction technology mode, become
The electrical engineering construction period increases, and in process of construction, restraining factors increase, and it is a certainty that quality, cost uncontrollable factor increase
Trend.
For this reason, being directed to the problems referred to above, in the urgent need to the reality from electrical network, according to Resources for construction economizing type, environment friend
The requirement of good type society, improves capital construction level, and lifting transformer station capital construction level, research new technology, new technique, improve soil further
Ground utilization rate, reduces construction of transformer substation, the impact to surrounding enviroment for the construction, reduces the factor being restricted by external condition as far as possible,
Improve transformer substation construction quality, rationally control cost, to meet social development, the requirement to transformer station for the urban construction from now on.
Fully-prefabricated assembled transformer station, as a kind of brand-new capital construction assembly mode, by by conventional " construction " pattern
Rise to " manufacture " pattern, using modular design, by the reasonable modularity of transformer station complete for One function, each
Modular structure function unit carries out prefabricated all in modern plant, completes line and modular debugging in inside plants,
Substation field only needs to carry out external connection and Coupled motion debugging, greatly reduces the workload of substation field, simultaneously
Due to employing prefabricated pattern in modern plant, substantially improve construction condition, decrease due to site operation technology water
Equal the uneven construction quality difference leading to, effectively increase build guality, decrease the control blind spot of construction quality.Due to
Build consumptive material to recycle on the spot in factory, effectively reduce engineering cost.From the point of view of experience outside the province, by using dress
The build model of Pei Shi transformer station, its engineering time more common construction period shortens 30% 60%, and construction costs investment base
This is constant or slightly improve, and in process of construction quality control, Financing control, duration control in uncontrollable factor significantly subtract
Few, construction quality, engineering construction efficiency greatly improve, and transformer station's impact to external world substantially reduces, and resource consumption significantly reduces,
Land utilization ratio has and is obviously improved.Therefore, using pre-assembled formula transformer station, it is to solve above-mentioned contradiction highly to use for reference reference
A thinking.
Yunnan is located in High aititude, many earthquake zones, many mountain regions area, and how pre-assembled formula transformer station at present should be in height above sea level 1000
Plains region below rice, earthquake intensity is relatively low, and orographic condition preferably, there is no in High aititude, high earthquake intensity, Mountainous Regions
Construction experiences.Therefore, relevant design under Yunnan Power System physical condition for the pre-assembled that the conducts a research formula transformer station, study on construction,
Investment ratio is analyzed, and for the construction carrying out pre-assembled formula transformer station in Yunnan Power System in the future, reduces the consumption to resource, accounts for
With reducing the impact to environment, improving construction quality etc. and there is very real directive significance.
Content of the invention
The technical problem to be solved in the present invention is: provides a kind of pre-assembled formula transformer station construction method, studies pre-assembled formula
The relevant design of transformer station, study on construction, investment ratio analysis, for the construction carrying out pre-assembled formula transformer station in the future, reduce
To the consumption of resource, occupancy, reduce the impact to environment, improve construction quality etc. and there is very real directive significance.
The problem to be solved in the present invention is achieved by the following technical solution.
A kind of pre-assembled formula transformer station construction method, the present invention includes the equipment choice of pre-assembled formula transformer station, builds and apply
Work and pre-assembled formula transformer station box stress safety detection；
Wherein,
The equipment choice of pre-assembled formula transformer station, mesolow power distribution equipment employs " prepackage type ", the thinking of " modularity ",
It is integrated in prepackage type Factory Building, high voltage distribution installation is using the arrangement form of outdoor gis；The 110kv main transformer of preassembled transformer station
The type of cooling using oil pattern；Main transformer high, medium and low voltage three side is all using long cable section of ingoing line mode；
In the construction of pre-assembled formula transformer station, because pre-assembled formula transformer station is by the way of prefabrication case, at station
Guardroom need to be built or equally adopt prefabrication box for interior, field apparatus basis is processed using conventional concrete；Whole station
Area, in addition to carrying out levelling of the land, only carries out main transformer, gis equipment and mesolow prefabricated box foundation construction；In work progress,
Need to arrange aproll to basic surrounding, at corresponding casing enabling, put forward money according to early stage integration of equipments business, pedal step is rationally set；
According to HVAC requirement, BAIYE fenestra is opened up for casing part of basseting, after BAIYE fenestra, adopts steel wire to close；In Factory Building
Lower setting cable interlayer and cable cavern, cable cavern takes fire-proof sealing material to block on concrete wall；Prepackage type power transformation
Cable duct of standing is completed using overall u-shaped segmentation cable duct, cable furrow bank and base plate one-piece casting in factory, in cable furrow bank and
The inside pre-fabricated electric cables support that base plate one-piece casting in factory completes, is bolted using prefabricated component during connection；Pre-assembled formula
Enclosure wall is made up of rim of a cup basis, the precast concrete column with notch and alc plate, using cast-in-place rim of a cup basis；With notch
After precast concrete column is transported to job site, it is inserted into rim of a cup basis, then consolidated after adjustment perpendicularity, curtain wall penel
Gap and between cylinder notch is processed with high-grade cement mortar joint filling；
Pre-assembled formula transformer station box stress safety detection includes:
(1) pre-assembled formula transformer station box Transport Safety detection, for checking stressing conditions in transportation for the casing,
Using finite element emulation software ansys, the casing of pre-assembled formula transformer station is modeled, in modeling process, respectively to casing
Environment division and casing corridor section are modeled, simultaneously to model x to, y to z, to applying acceleration, chooses gravity and accelerates
Degree, with casing and compartment bearing vertical loading board as fixed constraint, is emulated；According to types of models, select solid197 unit
Type, carries out free mesh to phantom, and dividing precision is acquiescence precision, through simulation calculation, obtains prefabricated box
The traffic intensity emulation bulk deformation amount of environment division and corridor section, integrated stress amount；
(2) stressing conditions during lifting for the pre-assembled formula transformer station box, are set up using aforementioned finite element analyses
Model, to prepackage type power transformation casing vertical loading board apply lifting rope direction pulling force, to casing apply self gravitation, to vertical loading board axle
Apply constraint to vertical with hole for hoist faying face, carry out structural static emulation, calculate case body equipment part and corridor section exists
Bulk deformation amount during lifting and lifting stress；
(3) pre-assembled formula transformer station box assembly safety detection, using ansys finite element emulation software to whole casing
It is modeled, stress and strain model is carried out to model, gravitational load is applied to prefabricated box, restrained end selects prefabricated box collet and ground
Base weld is fixed constraint, and setting prefabricated box quality and every equipment press reserved Mass Calculation, and carrying out structural static has
Limit unit calculates, and obtains deformation quantity, the stress of prefabricated box bulk deformation amount, prefabricated box integrated stress and key point after calculating
Value；
(4) pre-assembled formula transformer station box wind loading rating detection, using ansys software to preassembled transformer station whole case
Body is modeled；According to regional blast band situation, in the case of checking normal wind speed, interval according to blast, to prefabricated box appearance
Face applies varying load, and setting time is interval, and examines the deformation of pre-assembled formula transformer station box and stress under extreme case.
Under high altitude environment, the construction method of pre-assembled formula transformer station of the present invention also includes:
(1) electrical apparatus external insulation intensity
110kv power distribution equipment: preassembled transformer station 110kv power distribution equipment adopts sf6 as the gis equipment of dielectric,
Each component pressure level of device interior can not be revised, and uses according to standard below 1000 meters of GB height above sea level；Gis equipment casing
Between spacing, sleeve pipe over the ground spacing on height above sea level impact make correction；
Main transformer part: preassembled transformer station main transformer sleeve of main transformer external insulation needs according to external insulation height above sea level
It is modified, related correction factor, according to GB and iec standard, is modified according to below equation:
U=kau0(2.1)
Wherein, u is equipment actual withstanding voltage value, u0For standard pressure voltage under 1000m height above sea level for the equipment, kaFor height above sea level
Correction factor, h2For the actual height above sea level in site.M is height above sea level modifying factor, for power frequency and lightning surge, takes 1.0, for operation
Overvoltage takes 0.75, and the phase and phase spacing of related sleeve pipe, relatively spacing need to be modified；
Low-voltage distribution equipment: within 3000 meters of height above sea level, using conventional indoor switch cabinet；Related electric equipment is pressure water
Flat, safe distance equal external insulation correction, the wherein resistance to voltage levels of equipment are modified with reference to formula (2.1) and (2.2), revise simultaneously
Device space safe distance；
For low-tension switch cabinet, when height above sea level is less than 3000 meters, according to site conditions of transportation and correction result,
By technology and economy comparison, select traffic program and switch cubicle insulation pattern；When height above sea level is higher than 3000 meters, using sf6 insulation
Inflatable switch cabinet；
(2) equipment cooling, sealability
In the key position of the both outdoors and indoors equipment of pre-assembled formula transformer station, set up the density with pressure indicated work energy and continue
Electrical equipment, and the indicator of the type need to be in the position being easy to observe, once pressure drop, relay sends alarm signal in time
Number；
(3) ultraviolet radiation resisting and condensation
For outdoor equipment, in the powered position more important for safety in operation, brushing anti-ultraviolet protective paint；At family
At outer correlation meter, reading instument, it is equipped with related anti-ultraviolet protecting film；For indoor equipment, in the Factory Building protection of prepackage type
Wall door and window, reasonable Arrangement ultraviolet protection film；
Larger for temperature difference per day, and the higher area of humidity, in the design phase, rationally increase outdoor equipment terminal box, lcp
The heating power of convergence control cabinet；Simultaneously for the area of extreme low temperature, outdoor sf6 equipment arranges heater, to prevent sf6 gas
Liquefaction.
Under high earthquake intensity environment, the construction method of pre-assembled formula transformer station of the present invention also includes:
(1) electrical equipment
In pre-assembled formula transformer station, high-voltage switch gear adopts combined enclosed electrical equipment by chopper, disconnecting switch, mutual inductance
Device integration of equipments is in closed vat, and the line of equipment adopts plug-in type cable and connect mode, and main transformer high-pressure side adopts
Plug-in type cable inlet wire, and medium voltage side adopts plug-in Stranded cable to connect or buses of insulation tubes connects；
(2) construction of structures
Using prefabrication formula light steel type casing, casing adopts light gauge steel structure to design；
Using finite element simulation means, simulation study is carried out to the casing stress of transformer station, to verify pre- under high earthquake intensity
The reliability of casing processed:
First, according to different areas, prefabricated box antidetonation Mechanics Calculation standard is set；Under earthquake state, shear wave is to pre-
Casing impact processed is maximum, according to regional seismic fortification intensity grade, designs the basic accekeration of earthquake, collet is connected with ground
Place's reinforcing bar applies horizontal direction load, and reinforcing bar is restrained end with ground junction, carries out model analyses, obtains six first order modes, and
Mechanical strength check is carried out to second_mode emulation data, sets up phantom, calculate prefabricated box antidetonation under second_mode and imitate
True mode deflection and stress value.
The low-tension switch cabinet of preassembled transformer station mesolow side of the present invention adopts compact xgn to fix cabinet.
110kv main transformer noise level of the present invention is not higher than 65 (onaf)/60 (onan) db.
110kv main transformer noise level of the present invention is not higher than 63 (onaf)/58 (onan) db.
Compared with prior art, the invention has the beneficial effects as follows:
The pre-assembled that conducts a research formula transformer station relevant design under various circumstances, study on construction, in the future in difference
Carry out the construction of pre-assembled formula transformer station under environment, reduce the consumption to resource, occupancy, reduce the impact to environment, raising is built
If quality etc. has very real directive significance.
Specific embodiment
Below in conjunction with the accompanying drawings present disclosure is described in further detail.
A kind of pre-assembled formula transformer station construction method, the present invention includes the equipment choice of pre-assembled formula transformer station, builds and apply
Work and pre-assembled formula transformer station box stress safety detection；
Wherein,
The equipment choice of pre-assembled formula transformer station, mesolow power distribution equipment employs " prepackage type ", the thinking of " modularity ",
It is integrated in prepackage type Factory Building, high voltage distribution installation is using the arrangement form of outdoor gis；The 110kv main transformer of preassembled transformer station
The type of cooling using oil pattern；Main transformer high, medium and low voltage three side is all using long cable section of ingoing line mode；
In the construction of pre-assembled formula transformer station, because pre-assembled formula transformer station is by the way of prefabrication case, in station
Guardroom only need to be built or equally adopt prefabrication box, field apparatus basis is processed using conventional concrete.Entirely
Stand area in addition to carrying out levelling of the land, only carries out main transformer, gis equipment and mesolow prefabricated box foundation construction.In work progress
In, need to arrange aproll to basic surrounding, at corresponding casing enabling, put forward money according to early stage integration of equipments business, brow landing is rationally set
Rank, makes casing be connected with ground, facilitates operations staff to pass in and out.According to HVAC requirement, BAIYE is opened up for casing part of basseting
Fenestra, adopts steel wire to close, prevents toy from piercing in cable floor after BAIYE fenestra；
Because preassembled transformer station employs precast factory, therefore antistatic floor cannot be adopted, need to arrange under Factory Building
Cable interlayer and cable cavern.Cable cavern takes fire-proof sealing material to block on concrete wall；
Using overall u-shaped segmentation cable duct, cable furrow bank and base plate are overall in factory to be poured preassembled transformer station cable duct
Build and complete, in the cable furrow bank inside pre-fabricated electric cables support that one-piece casting in factory completes with base plate, adopt prefabricated during connection
Part carries out bolting, and relevant position, only according to engineering design requirements, is put, cable channel cover plate is moved flexibly, is easy in scene
Putting of cable, greatly reduces the workload that conventional substation cable duct interts cable；
Pre-assembled formula enclosure wall is made up of rim of a cup basis, the precast concrete column with notch and alc plate, using cast-in-place rim of a cup
Basis；Precast concrete column with notch is transported to behind job site, is inserted into rim of a cup basis, then after adjustment perpendicularity
Consolidated.Gap high-grade cement mortar joint filling and between cylinder notch for the curtain wall penel (concrete slab and alc plate) processes and is
Can.
Pre-assembled formula transformer station box stress safety detection of the present invention includes:
(1) pre-assembled formula transformer station box Transport Safety detection, usual pre-assembled formula transformer station box adopts lorry to transport
Defeated, fixed form is binding plus hinge, travels relevant regulations according to " law on road traffic safety " vehicle, generally lorry limit
100 kilometers of speed, in prediction on such basis, transverse acceleration is not to be exceeded 30m/s2, longitudinal acceleration be not to be exceeded 50m/s2, vertical acceleration
Degree is not to be exceeded 30m/s2.For checking the stressing conditions of casing, using finite element emulation software ansys to preassembled transformer station
Casing is modeled, and in modeling process, respectively case body equipment part and casing corridor section is modeled, simultaneously to mould
Type applies x to (horizontal) 30m/s2, y is to (longitudinal) 50m/s2, z is to (vertical) 30m/s2Acceleration, acceleration of gravity takes
9.8m/s2(only investigating vertical acceleration and acceleration of gravity situation in the same direction), with casing with compartment bearing (vertical loading board) be
Fixed constraint, is emulated；According to types of models, select solid197 cell type, free grid is carried out to phantom and draws
Point, dividing precision is acquiescence precision, through simulation calculation, obtains prefabricated box environment division and the traffic intensity of corridor section is imitated
True bulk deformation amount, integrated stress amount；
(2) stressing conditions detection during lifting for the pre-installed transformer station box, is built using aforementioned finite element analyses
Vertical model, applies the pulling force in lifting rope direction to prepackage type power transformation casing vertical loading board, applies self gravitation to casing, to vertical loading board
Axial and vertical and hole for hoist faying face applies constraint, carries out structural static emulation, calculates case body equipment part and corridor section
Bulk deformation amount during lifting and lifting stress；
(3) pre-assembled formula transformer station box assembly safety detection, using ansys finite element emulation software to whole casing
It is modeled, stress and strain model is carried out to model, gravitational load is applied to prefabricated box, prefabricated box quality is pressed 7t and calculated, constraint
It is fixed constraint that end selects prefabricated box collet and ground weld, and every equipment is pressed reserved quality 1.5t and calculated, and carries out structure
Static(al) FEM calculation, obtain after calculating prefabricated box bulk deformation amount, prefabricated box integrated stress and key point deformation quantity,
Stress value；
(4) the wind loading rating detection of pre-installed transformer station box, according to " railway bridges and culverts designs fundamental norms tb10002.1-
2005 " annex 1 " national fundamental wind pressure scattergram " in, in conjunction with Yunnan inside the province numerously from the point of view of the wind friction velocity in area, current Yunnan
More typical wind friction velocity 25 meter per second inside the province, blast is interval to be between 800pa to 1000pa.First, using ansys software
To preassembled transformer station, whole casing is modeled；According to Yunnan Province blast band situation, in the case of checking normal wind speed, blast
Interval in order, when between 800pa to 1000pa, to apply varying load to prefabricated box outer surface, time interval takes 48h, and examines extreme
In the case of (adjacent side walls and thereon roof are acted on by 1200pa to 1500pa varying load simultaneously) pre-assembled formula power transformation
Stand the deformation of casing and stress；
In high altitude localitiess, a kind of construction method of pre-assembled formula transformer station of the present invention also includes:
(1) electrical apparatus external insulation intensity
110kv power distribution equipment: preassembled transformer station 110kv power distribution equipment is generally set as the gis of dielectric using sf6
Standby.Gis equipment adopts sf6 as dielectric due to substantial amounts of built-in electrical insulation, and is packaged in tank body, and built-in electrical insulation is not subject to
Sf6 affects.Therefore each component pressure level of device interior can not be revised, according to standard below 1000 meters of GB height above sea level using being
Can.For between gis equipment casing and sleeve pipe, sleeve pipe over the ground between, due to employing air as dielectric, thus sleeve pipe it
Between spacing, sleeve pipe over the ground spacing need on height above sea level impact make correction；
Main transformer part: preassembled transformer station main transformer generally adopts conventional open air arrangement main transformer, due in main transformer
Portion adopts oilpaper as dielectric, and interior insulation is not affected by height above sea level, and only sleeve of main transformer external insulation needs according to external insulation height above sea level
Highly it is modified.Related correction factor is according to GB and iec standard it is proposed that being modified according to below equation:
U=kau0(2.1)
Wherein, u is equipment actual withstanding voltage value, u0For standard pressure voltage under 1000m height above sea level for the equipment, kaFor height above sea level
Correction factor, h2For the actual height above sea level in site.M is height above sea level modifying factor, for power frequency and lightning surge, takes 1.0, for operation
Overvoltage takes 0.75；
The phase and phase spacing of the related sleeve pipe of correction simultaneously, relatively spacing；
Low-voltage distribution equipment: preassembled transformer station low-voltage distribution equipment generally adopts indoor switch cabinet.From actually used feelings
From the point of view of condition, it may be considered that using conventional indoor switch cabinet within 3000 meters of height above sea level.The type switch cubicle adopts kyn and kgn type
Cabinet, the resistance to voltage levels of related electric equipment, safe distance are required to consider external insulation correction, the wherein resistance to voltage levels of equipment can refer to public affairs
Formula (2.1) and (2.2) are modified；Corrective space safety distance.
For low-tension switch cabinet, when height above sea level is less than 3000 meters, according to site conditions of transportation and correction result,
By technology and economy comparison, select traffic program and switch cubicle insulation pattern；When height above sea level is higher than 3000 meters, using sf6 insulation
Inflatable switch cabinet；
(2) equipment cooling, sealability
Preassembled transformer station outdoor part is usually high voltage distribution installation and main transformer, in related key position, increases
If with the density monitor of pressure indicated work energy, and the indicator of the type need to be in the position being easy to observe, to ensure to run
Personnel can observe the internal pressure of equipment in time, once pressure drop, relay sends alarm signal in time；
Preassembled transformer station mesolow side is indoor equipment, in equipment key position it should also set up band pressure instruction
The density monitor of function, in order to observing and reporting to the police；
(3) ultraviolet radiation resisting and condensation
High altitude localitiess, uitraviolet intensity is larger, and temperature difference per day is larger.Under ultraviolet irradiates, equipment is susceptible to absolutely
Edge is aging, causes insulating capacity to decline.For outdoor equipment, in the powered position more important for safety in operation, Ke Yikao
Consider brushing anti-ultraviolet protective paint.Simultaneously in equipment ordering, strictly indicate sunshine uitraviolet intensity, by equipment manufacturer in equipment
Fabrication stage reasonable consideration margin of safety.Out of doors related meter, at reading instument, it is purple that integration of equipments business should be equipped with phase official seal
Outside line protecting film, injury-free to ensure internal instrument.For indoor equipment it should prepackage type Factory Building protecting wall door and window,
Reasonable Arrangement ultraviolet protection film, to prevent ultraviolet from entering the indoor harm to equipment.
Larger for temperature difference per day, and the higher area of humidity, it should combine actual, in the design phase, rationally increases outdoor
Arrangement terminal case, the heating power of lcp convergence control cabinet, to ensure that outdoor equipment has enough dehumidifying effects, to prevent condensation
Occur.For indoor equipment it should be required according to Regulations by designing unit, appropriate design equipment runs humiture, to protect
Card equipment is in rational temperature humidity range, to prevent condensation.Simultaneously for the area of extreme low temperature, outdoor sf6 equipment should
Reasonable consideration arranges heater, to prevent sf6 gas liquefaction.
In high earthquake intensity area, the construction method of the pre-assembled formula transformer station of the present invention also includes:
(1) electrical equipment
In pre-assembled formula transformer station, high-voltage switch gear adopt combined enclosed electrical equipment (gis or pass) by chopper, every
Leave the integration of equipments such as pass, transformer in closed vat, and the line of equipment adopts plug-in type cable and connect mode, thus generation
Replace the electric wire that the bushing insulator of routine supports to connect, decreased during earthquake because the fracture of porcelain bushing shell causes device damage and event
Barrier power-off condition.Main transformer high-pressure side adopt plug-in type cable inlet wire, and medium voltage side adopt plug-in Stranded cable connect or
Person's buses of insulation tubes connects, and has been greatly reduced the infringement to this equipment for the earthquake；
(2) construction of structures
Using prefabrication formula light steel type casing, casing adopts light gauge steel structure to design, low with compact, light, center of gravity
Feature, and the manufacturing process of batch production, greatly reduce the impact to transformer station for the earthquake.For verifying under high earthquake intensity,
The reliability of prefabricated box, carries out simulation study using finite element simulation means to the casing stress of transformer station.
According to " seismic design provision in building code gb50011-2010 ", prefabricated box antidetonation Mechanics Calculation standard；Earthquake state
Under, shear wave affects maximum, according to Yunnan seismic fortification intensity for, in the case of 7 degree, design earthquake accelerates substantially on prefabricated box
Angle value is 0.15g, applies 0.15g horizontal direction load to collet and ground junction reinforcing bar, reinforcing bar and ground junction are about
Shu Duan, carries out model analyses, obtains six first order modes, and carries out mechanical strength check to second_mode emulation data, sets up emulation
Model, calculates prefabricated box antidetonation phantom deflection and stress value under second_mode.
The low-tension switch cabinet of preassembled transformer station mesolow side of the present invention adopts compact xgn to fix cabinet.
110kv main transformer noise level of the present invention is not higher than 65 (onaf)/60 (onan) db.
110kv main transformer noise level of the present invention is not higher than 63 (onaf)/58 (onan) db.
For preassembled transformer station, because mesolow power distribution equipment all employs " prepackage type ", the think of of " modularity "
Road, is integrated in prepackage type Factory Building, and in the same manner, high voltage distribution installation is from the overall modularization thinking of economy and whole station, knot
Close operating experience it is recommended that adopting the arrangement form of outdoor gis.
Consider that preassembled transformer station needs to embody the features such as 3c green, energy-conserving and environment-protective, therefore recommend the master of preassembled transformer station
Become the type of cooling and adopt onan, i.e. oil pattern.
According to current GB and Industry code requirements, the noise level limit value of 110kv main transformer is: 70 (onaf)/70
(onan)db.For preassembled transformer station it is considered to embody green 3c energy-conserving and environment-protective feature, in combination with current transformator main flow system
Make level, its noise level should be according to the general term execution in south electric network " 3c green network builds evaluation criterion ", that is,
110kv main transformer noise level is not higher than 65 (onaf)/60 (onan) db it is recommended that according to south electric network, " 3c green is electric when having ready conditions
Net build evaluation criterion " in preference execution, that is, 110kv main transformer noise level be not higher than 63 (onaf)/58 (onan) db.
Additionally, when main transformer three side is all using long cable section of ingoing line, the energized conductor due to exposing in station greatly reduces, stand in electricity
Magnetic field intensity declines naturally, is conducive to optimizing reduction whole station electromagnetic field index further.Accordingly, it is considered to the total tune of whole station
And modularization thinking is it is proposed that when detailed programs are implemented, pay the utmost attention to main transformer high, medium and low voltage three side all using cable (all insulation
Copper pipe bus) wire leading method, at utmost to embody the features such as preassembled transformer station energy-conserving and environment-protective, green 3c.
Selecting switch cubicle at present, compact xgn fixes cabinet small volume, takes up room more preassembled transformer station mesolow the side
Few, save expropriation of land and construction cost, the comprehensive cost low of transformer station, electrical characteristic is good, and mechanical life is long, reliability is high, permissible
Accomplish few maintenance or all non-maintaining, therefore save substantial amounts of operation and maintenance cost, both meet personnel reduction and enlargement inside power supply department
Management objectives, decrease the society's power failure causing because of equipment fault and scheduled overhaul.Therefore, it is recommended that 110kv prepackage type power transformation
Stand mesolow side using compact xgn fixation cabinet.
Claims (6)
1. a kind of pre-assembled formula transformer station's construction method is it is characterised in that include the equipment choice of pre-assembled formula transformer station, construction
Construction and pre-assembled formula transformer station box stress safety detection；
Wherein,
The equipment choice of pre-assembled formula transformer station, mesolow power distribution equipment, using " prepackage type ", the thinking of " modularity ", is integrated in
In prepackage type Factory Building, high voltage distribution installation is using the arrangement form of outdoor gis；The 110kv main transformer of preassembled transformer station is using oil
Soak the type of cooling of self cooling pattern；Main transformer high, medium and low voltage three side is all using long cable section of ingoing line mode；
In the construction of pre-assembled formula transformer station, because pre-assembled formula transformer station is by the way of prefabrication case, in station only
Guardroom need to be built or equally adopt prefabrication box, field apparatus basis is processed using conventional concrete；Whole station area removes
Carry out outside levelling of the land, only carry out main transformer, gis equipment and mesolow prefabricated box foundation construction；In work progress, need
Aproll is arranged to basic surrounding, at corresponding casing enabling, puies forward money according to early stage integration of equipments business, pedal step is rationally set；For
Casing part of basseting opens up BAIYE fenestra according to HVAC requirement, adopts steel wire to close after BAIYE fenestra；Divide in Factory Building
Put cable interlayer and cable cavern, cable cavern takes fire-proof sealing material to block on concrete wall；Preassembled transformer station electricity
Using overall u-shaped segmentation cable duct, cable furrow bank and base plate one-piece casting in factory completes cable ditch, in cable furrow bank and base plate
The inside pre-fabricated electric cables support that one-piece casting completes in factory, is bolted using prefabricated component during connection；Pre-assembled formula enclosure wall
It is made up of rim of a cup basis, the precast concrete column with notch and alc plate, using cast-in-place rim of a cup basis；Prefabricated with notch
After concrete column is transported to job site, it is inserted into rim of a cup basis, then consolidated after adjustment perpendicularity, curtain wall penel and post
Gap between body notch is processed with high-grade cement mortar joint filling；
Pre-assembled formula transformer station box stress safety detection includes:
(1) pre-assembled formula transformer station box Transport Safety detection, for checking stressing conditions in transportation for the casing, adopts
With finite element emulation software ansys, the casing of pre-assembled formula transformer station is modeled, in modeling process, respectively casing is set
Standby part and casing corridor section are modeled, simultaneously to model x to, y to z, to applying acceleration, chooses gravity and accelerates
Degree, with casing and compartment bearing vertical loading board as fixed constraint, is emulated；According to types of models, select solid197 unit
Type, carries out free mesh to phantom, and dividing precision is acquiescence precision, through simulation calculation, obtains prefabricated box
The traffic intensity emulation bulk deformation amount of environment division and corridor section, integrated stress amount；
(2) stressing conditions detection during lifting for the pre-assembled formula transformer station box, is set up using aforementioned finite element analyses
Model, to prepackage type power transformation casing vertical loading board apply lifting rope direction pulling force, to casing apply self gravitation, to vertical loading board axle
Apply constraint to vertical with hole for hoist faying face, carry out structural static emulation, calculate case body equipment part and corridor section exists
Bulk deformation amount during lifting and lifting stress；
(3) pre-assembled formula transformer station box assembly safety detection, is entered to whole casing using ansys finite element emulation software
Row modeling, carries out stress and strain model to model, applies gravitational load to prefabricated box, and restrained end selects prefabricated box collet and ground
Weld is fixed constraint, and setting prefabricated box quality and every equipment press reserved Mass Calculation, carry out structural static limited
Unit calculates, and obtains deformation quantity, the stress value of prefabricated box bulk deformation amount, prefabricated box integrated stress and key point after calculating；
(4) pre-assembled formula transformer station box wind loading rating detection, using ansys software to preassembled transformer station whole casing
It is modeled；According to regional blast band situation, in the case of checking normal wind speed, interval according to blast, to prefabricated box outer surface
Apply varying load, setting time is interval, and examines the deformation of pre-assembled formula transformer station box and stress under extreme case.
2. a kind of pre-assembled formula transformer station's construction method according to claim 1 is it is characterised in that in high altitude environment
Under, the construction method of this pre-assembled formula transformer station also includes:
(1) electrical apparatus external insulation intensity
110kv power distribution equipment: preassembled transformer station 110kv power distribution equipment adopts sf6 as the gis equipment of dielectric, equipment
Each component pressure level internal is not revised；Spacing is made on height above sea level impact over the ground for spacing between gis equipment casing, sleeve pipe
Revise；
Main transformer part: preassembled transformer station main transformer sleeve of main transformer external insulation needs to be carried out according to external insulation height above sea level
Revise, related correction factor is modified according to below equation:
U=kau0(2.1)
Wherein, u is equipment actual withstanding voltage value, u0For standard pressure voltage under 1000m height above sea level for the equipment, kaFor height above sea level correction
Coefficient, h2For the actual height above sea level in site, m is height above sea level modifying factor, for power frequency and lightning surge, takes 1.0, for operating electricity
Pressure takes 0.75, and the phase and phase spacing of related sleeve pipe, relatively spacing need to be modified；
Low-voltage distribution equipment: within 3000 meters of height above sea level, using conventional indoor switch cabinet；The resistance to voltage levels of related electric equipment, peace
Full distance equal external insulation correction, the wherein resistance to voltage levels of equipment are modified with reference to formula (2.1) and (2.2), corrective simultaneously
Space safety distance；
For low-tension switch cabinet, when height above sea level is less than 3000 meters, according to site conditions of transportation and correction result, pass through
Technology and economy comparison, selects traffic program and switch cubicle insulation pattern；When height above sea level is higher than 3000 meters, using filling of sf6 insulation
Gas formula switch cubicle；
(2) equipment cooling, sealability
In the key position of the both outdoors and indoors equipment of pre-assembled formula transformer station, set up the density relay with pressure indicated work energy
Device, and the indicator of the type need to be in the position being easy to observe, once pressure drop, relay sends alarm signal in time；
(3) ultraviolet radiation resisting and condensation
For outdoor equipment, in the powered position more important for safety in operation, brushing anti-ultraviolet protective paint；Phase out of doors
At pass meter, reading instument, it is equipped with related anti-ultraviolet protecting film；For indoor equipment, in the Factory Building protecting wall door of prepackage type
Window, reasonable Arrangement ultraviolet protection film；
Larger for temperature difference per day, and the higher area of humidity, in the design phase, rationally increase outdoor equipment terminal box, lcp converges and controls
The heating power of cabinet；Simultaneously for the area of extreme low temperature, outdoor sf6 equipment arranges heater, to prevent sf6 gas liquefaction.
3. a kind of pre-assembled formula transformer station's construction method according to claim 1 is it is characterised in that in high earthquake intensity ring
Under border, the construction method of described pre-assembled formula transformer station also includes:
(1) electrical equipment
In pre-assembled formula transformer station, chopper, disconnecting switch, transformer are set by high-voltage switch gear using combined enclosed electrical equipment
Standby be integrated in closed vat, and the line of equipment adopts plug-in type cable and connect mode, and main transformer high-pressure side is using plug
Formula long cable section of ingoing line, and medium voltage side adopts plug-in Stranded cable to connect or buses of insulation tubes connects；
(2) construction of structures
Using prefabrication formula light steel type casing, casing adopts light gauge steel structure to design；
Using finite element simulation means, simulation study is carried out to the casing stress of transformer station, to verify precast box under high earthquake intensity
The reliability of body:
First, according to different areas, prefabricated box antidetonation Mechanics Calculation standard is set；Under earthquake state, shear wave is to precast box
Body impact is maximum, according to regional seismic fortification intensity grade, designs the basic accekeration of earthquake, to collet and ground junction steel
Muscle applies horizontal direction load, and reinforcing bar and ground junction are restrained end, carry out model analyses, obtain six first order modes, and to two
First order mode emulation data carries out mechanical strength check, sets up phantom, calculates prefabricated box antidetonation emulation mould under second_mode
Type deflection and stress value.
4. a kind of pre-assembled formula transformer station's construction method according to claim 1 is it is characterised in that the low pressure of mesolow side
Switch cubicle adopts compact xgn to fix cabinet.
5. a kind of pre-assembled formula transformer station's construction method according to claim 1 is it is characterised in that 110kv main transformer noise
Level is not higher than 65 (onaf)/60 (onan) db.
6. a kind of pre-assembled formula transformer station's construction method according to claim 1 is it is characterised in that 110kv main transformer noise
Level is not higher than 63 (onaf)/58 (onan) db.
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| CN106088701A (en) * | 2016-07-18 | 2016-11-09 | 中国电力科学研究院 | A kind of 35kV assembled intelligent substation building method |
| CN106529010B (en) * | 2016-11-01 | 2020-04-24 | 深圳供电局有限公司 | Method for designing anti-condensation ring main unit shell by using finite element model |
| CN108964015A (en) * | 2018-05-31 | 2018-12-07 | 海宁市金能电力实业有限公司 | A method of it is designed with electrical engineering height for low meter |
| CN109488102A (en) * | 2018-11-28 | 2019-03-19 | 国网江苏省电力有限公司南通供电分公司 | A kind of power distribution network 10kV insulator crossarm |
| CN111706127A (en) * | 2020-05-29 | 2020-09-25 | 南京南瑞继保工程技术有限公司 | Indoor transformer substation construction method |
| CN115506599A (en) * | 2021-11-30 | 2022-12-23 | 青岛特锐德电气股份有限公司 | Installation method of prefabricated cabin for transformer substation |
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Address after: 650011 Kunming East Road, Yunnan, No. 73 Patentee after: YUNNAN POWER GRID Corp. Patentee after: China Energy Construction Group Yunnan Electric Power Design Institute Co.,Ltd. Address before: 650011 Kunming East Road, Yunnan, No. 73 Patentee before: YUNNAN POWER GRID Corp. Patentee before: Yunnan Electric Power Design Institute |
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Effective date of registration: 20240108 Address after: No.73, Tuodong Road, Kunming, Yunnan 650000 Patentee after: YUNNAN POWER GRID Co.,Ltd. Address before: 650011 Tuo Dong Road, Kunming, Kunming, Yunnan Patentee before: YUNNAN POWER GRID Corp. Patentee before: China Energy Construction Group Yunnan Electric Power Design Institute Co.,Ltd. |