CN207009220U - A kind of device to be cooled using air-duct-type air-conditioner installation guide duct to dry-type transformer - Google Patents
A kind of device to be cooled using air-duct-type air-conditioner installation guide duct to dry-type transformer Download PDFInfo
- Publication number
- CN207009220U CN207009220U CN201720425357.3U CN201720425357U CN207009220U CN 207009220 U CN207009220 U CN 207009220U CN 201720425357 U CN201720425357 U CN 201720425357U CN 207009220 U CN207009220 U CN 207009220U
- Authority
- CN
- China
- Prior art keywords
- air
- type
- dry
- duct
- transformer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000009434 installation Methods 0.000 title claims abstract description 26
- 238000001816 cooling Methods 0.000 claims abstract description 42
- 238000004378 air conditioning Methods 0.000 claims abstract description 36
- 238000012360 testing method Methods 0.000 claims abstract description 15
- 230000017525 heat dissipation Effects 0.000 claims abstract description 14
- 230000004913 activation Effects 0.000 claims abstract description 12
- 238000004088 simulation Methods 0.000 claims abstract description 12
- 238000001514 detection method Methods 0.000 claims abstract description 8
- 238000005057 refrigeration Methods 0.000 claims description 13
- 230000009466 transformation Effects 0.000 claims description 6
- 239000003822 epoxy resin Substances 0.000 description 24
- 229920000647 polyepoxide Polymers 0.000 description 24
- 238000001994 activation Methods 0.000 description 10
- 230000005611 electricity Effects 0.000 description 8
- 239000011810 insulating material Substances 0.000 description 8
- 238000004804 winding Methods 0.000 description 8
- 238000013461 design Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 230000032683 aging Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 5
- 238000009413 insulation Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 238000009826 distribution Methods 0.000 description 4
- 230000005855 radiation Effects 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000003878 thermal aging Methods 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000005520 electrodynamics Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000003685 thermal hair damage Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Air Conditioning Control Device (AREA)
Abstract
A kind of device to be cooled using air-duct-type air-conditioner installation guide duct to dry-type transformer, it is characterized in that, it is described using air-duct-type air-conditioner install additional guide duct be to the device that dry-type transformer cools freezed using air-duct-type air-conditioner caused by cold air be connected to plenum chamber via pipeline and led to by guide duct below dry-type transformer heat dissipation channel, then directly from heat dissipation channel by so as to realize the automatic forced wind cooling temperature lowering to dry-type transformer coil.And the cooling activation control of air-duct-type air-conditioner is controlled by two sets of autonomous control systems：First, air-duct-type air-conditioner carries the indoor circumstance temperature NTC of temp testing controlling system to switchgear house or transformer station's indoor temperature detection, according to the start and stop for the control air-duct-type air-conditioner that imposes a condition；Second, dry-type transformer coil temp testing controlling system coil temperature transducer PT100 detects to dry-type transformer coil temperature, according to the control auxiliary reclay that imposes a condition, the start and stop of simulation air-conditioning dedicated temperature sensor circuit control air-duct-type air-conditioner are switched to.
Description
Technical field
It the utility model is related to a kind of device to cool using air-duct-type air-conditioner installation guide duct to dry-type transformer.
Background technology
In power supply system, dry-type transformer has the excellent spy such as the feature of environmental protection, fire-retardant, shock resistance, non-maintaining because of it
Property, in the field higher to fire prevention, requirement of explosion proof such as skyscraper, commercial center, airport, chemical plant, nuclear power station, industrial and mining enterprises
Institute, is widely used.Because of the restriction of dry-type transformer manufacture craft, dry-type transformer be applied to voltage 35kVA and with
Under, individual capacity 2500kVA and following change power distribution station.At present, dry-type transformer main flow cooling method has natural air circulation
Cooling and blower fan forced air circulation cool down two kinds.Natural air circulation cooling is only applicable to low capacity, the dry type of Smaller load becomes
Depressor；Although blower fan forcing functions are cold suitable for the larger dry-type transformer of capacity, load, blower fan forced air circulation
But the cooling requirement for the dry-type transformer that capacity, load are larger and load variations are larger can not be met, and cooling blower is imitated
Rate is low, fault rate is higher easily causes transformer radiating not in time, and temperature rise is too high, has a strong impact on the service life of dry-type transformer
With safe and reliable, economic operation.
Utility model content
The purpose of this utility model can not be met to solve above-mentioned fan of dry type transformer forced air circulation cooling
The cooling requirement of capacity and load is larger and load variations are larger dry-type transformer, causes transformer radiating not in time, temperature
Too high, the problem of having a strong impact on the service life of dry-type transformer and safe and reliable, economical operation is risen, the utility model provides
A kind of new heat sink of dry-type transformer, using air-duct-type air-conditioner freeze caused by cold air via plenum chamber, wind-guiding
Pipe is led to below dry-type transformer heat dissipation channel, is then flowed out via inside transformer heat dissipation wind channel, it is substantially all dissipate in
In the transformer case of closing, make the reduction of transformer operating ambient temperature, be advantageous to bulk convection, the radiation drop of dry-type transformer
Temperature, so as to realize rapid dry-type transformer, effective temperature-reducing and the work(for extending dry-type transformer service life and raising load capacity
Energy.
The technical solution of the utility model is：It is a kind of to install what guide duct cooled to dry-type transformer additional using air-duct-type air-conditioner
Device, the device to be cooled using air-duct-type air-conditioner installation guide duct to dry-type transformer is to utilize air-duct-type air-conditioner refrigeration institute
Caused 17 DEG C of cold airs are connected to plenum chamber via pipeline and led to by guide duct below dry-type transformer heat dissipation channel, via
Inside transformer heat dissipation wind channel flows out, substantially all to dissipate in transformer case, making the reduction of transformer operating ambient temperature, has
Bulk convection, radiation cooling beneficial to dry-type transformer, so as to realize the air blast cooling of cleaning efficient to dry-type transformer coil
Cooling, and the refrigeration start-up and shut-down control of air-duct-type air-conditioner is made up of two sets of autonomous control systems：First, air-duct-type air-conditioner carries thermometric
The indoor circumstance temperature NTC of control system is to switchgear house or transformer station's indoor temperature detection, according to the control air-duct-type air-conditioner that imposes a condition
Start and stop；Second, dry-type transformer coil temp testing controlling system coil temperature transducer PT100 is to dry-type transformer coil temperature
Detected, according to the control auxiliary reclay that imposes a condition, be switched to simulation air-conditioning dedicated temperature sensor circuit control wind pipe type
The start and stop of air-conditioning.
A kind of described device to be cooled using air-duct-type air-conditioner installation guide duct to dry-type transformer, the wind of described device
Tube-type air conditioner refrigeration start-stop control system and auxiliary reclay are switched to be passed with the special temperature of accurate multiturn potentiometer simulation air-conditioning
Sensor circuit works：
(a) air-conditioning dedicated temperature sensor is negative tempperature coefficient thermistor, abbreviation NTC, its resistance raise with temperature and
Reduce, reduce and increase with temperature, resistance during 25 DEG C of nominal resistance is generally 10 K Ω -50K Ω；
(b) air-conditioner temperature setting range is -30 DEG C, and air-conditioning refrigeration when circumstance temperature is less than 15 DEG C does not work, and circumstance temperature is higher than 30
DEG C when heating do not work；
(c) normal coil temperature is 45 DEG C or so during dry-type transformer no-load running, and the heat of mainly iron core transmission draws
Rise, the temperature of Coil Detector cannot be directly used to control the start and stop of air-conditioning when dry-type transformer is run；
(d) Temperature Controller for Dry-Type Transformer detects dry-type transformer coil temperature using PT100 temperature sensors, when
Temperature value higher than sets target value and return difference value and when, dry Transformer Temperature Controller device internal relay KA1 coils obtain that electric its is normal
Contact KA1 closures are opened, switching auxiliary reclay KA6 obtains electric work, is serially connected with two couple in air-conditioning dedicated temperature sensor NTC loops
Normally-closed contact KA6-1, KA6-2 disconnect, while are connected to two couples of normally opened contact KA6- in air-conditioning dedicated temperature sensor NTC loops
3rd, KA6-4 is closed, and air-duct-type air-conditioner enabling signal is switched to simulation air-conditioning dedicated temperature sensor circuit, starting of air conditioner, starts
Refrigeration work；When dry-type transformer coil temperature, which is reduced to sets target value, subtracts the temperature value of return difference value, dry-type transformer
Temperature controller internal relay KA1 coil losing electricities its normally opened contact KA1 is disconnected by being closed into, and auxiliary reclay KA6 dead electricity, is serially connected with
Two couples of normally-closed contacts KA6-1, KA6-2 in air-conditioning dedicated temperature sensor NTC loops reply closure state, while are connected to air-conditioning
Two couples of normally opened contacts KA6-3, KA6-4 in dedicated temperature sensor NTC loops are disconnected by being closed into, air-duct-type air-conditioner enabling signal
Air-conditioning dedicated temperature sensor circuit is returned to, air-conditioning is stopped；
(e) accurate multiturn potentiometer R resistance is adjusted to be slightly less than 26 DEG C of cooling activation temperature set by air-duct-type air-conditioner,
When temperature sensor resistance, now wind pipe type is empty if simulation air-conditioning dedicated temperature sensor is switched to by auxiliary reclay
Displays temperature is adjusted to be slightly above 26 DEG C, the temperature value is set according to actual conditions.
A kind of described device to be cooled using air-duct-type air-conditioner installation guide duct to dry-type transformer, the wind of described device
Selection, installation and the start and stop parameter setting of tube-type air conditioner be：
(a) volume size of transformer room and the heat production of switchgear house or transformer station according to where treating cooling dry type transformer
Amount, select the air-duct-type air-conditioner of appropriate refrigerating capacity；
(b) air duct type air conditioning indoor machine is installed near dry-type transformer nearby, and air supplying distance is more short-acting, and rate is higher, dry type
The cooling-down effect of transformer coil is better；
(c) air-duct-type air-conditioner air outlet installation plenum chamber, separates six guide ducts and is respectively communicated to three groups of dry-type transformer
The heat dissipation channel Xia Kou positions of coil both sides；
(d) setting of air-duct-type air-conditioner start and stop parameter：
First, air-duct-type air-conditioner carries the indoor circumstance temperature NTC of temp testing controlling system to switchgear house or transformer station's indoor temperature inspection
Survey, under air-duct-type air-conditioner Automatic-cooling state, it is 26 DEG C of temperature values according to reality to set air-duct-type air-conditioner cooling activation temperature
Border situation setting；
Second, dry-type transformer coil temp testing controlling system, under air-duct-type air-conditioner Automatic-cooling state, simulation air-conditioning is special
Temperature when the resistance size of accurate multiturn potentiometer R in temperature sensor circuit is adjusted to be slightly less than 26 DEG C of air-duct-type air-conditioner temperature
The resistance of sensor is spent, concurrently sets dry-type transformer coil temp testing controlling system start and stop desired value as 50 DEG C, start and stop target is returned
Difference is 5 DEG C, cooling activation when now dry-type transformer coil temp testing controlling system detection temperature reaches 55 DEG C, coil temperature drop
Stop to freezing at 45 DEG C.
Beneficial effect is the utility model compared with prior art：
A kind of device to be cooled using air-duct-type air-conditioner installation guide duct to dry-type transformer of the present utility model, is solved
The cooling of dry-type transformer conventional blower forced air circulation can not meet that capacity and load are larger and what load variations were larger does
The cooling requirement of formula transformer, causes dry-type transformer radiating not in time, temperature rise is too high, has a strong impact on the use of dry-type transformer
The problem of life-span and safe and reliable, economical operation.Under dry-type transformer full load conditions, dry-type transformer band can be improved and carry energy
Power at least 30%.
Brief description of the drawings:
Fig. 1 is that a kind of system architecture for being installed additional the device that guide duct cools to dry-type transformer using air-duct-type air-conditioner is illustrated
Figure.
Fig. 2 is dry-type transformer three-phase coil structural representation；
Fig. 3 is that six guide ducts pass to mouth structure schematic diagram under three groups of coil heat dissipation channels respectively；
Fig. 4 is guide duct 1,2 arrangement architecture schematic diagrames.
Fig. 5 is Temperature Controller for Dry-Type Transformer peripheral circuit wiring diagram.
Fig. 6 is auxiliary reclay air-duct-type air-conditioner temperature control circuit.
Fig. 7 is the heating power curve map under SCB10-1600/10 dry-type transformer different loads.
Wherein：1 air-duct-type air-conditioner, 2 air duct type air conditioning indoor machines, 3 plenum chambers, 4 carry temp measuring system in wind pipe type, 5 set
Determine air-duct-type air-conditioner cooling activation condition, 6 meet air-duct-type air-conditioner cooling activation condition, it is 7 air-duct-type air-conditioner cooling activations, 8 dry
Formula transformer temperature controller, 9 setting dry Transformer Temperature Controller switch start and stop desired values and start and stop target return difference, 10 meet temperature control
Switch entry condition, the action of 11 auxiliary reclays, 12 transformer coils, 13 PT100 thermal resistances, 14-19 guide ducts, 20 dry types
Transformer heat dissipation channel, 21 dry-type transformer iron cores.
Embodiment:
The utility model is described in further detail below in conjunction with embodiment：
Referring to the drawings shown in 1-7, one kind of the present utility model installs guide duct additional to dry-type transformer using air-duct-type air-conditioner
The device of cooling, the device to be cooled using air-duct-type air-conditioner installation guide duct to dry-type transformer is to utilize air-duct-type air-conditioner
Cold air caused by refrigeration is connected to plenum chamber via pipeline and led to by guide duct below dry-type transformer heat dissipation channel, so
Dissipated by substantially all after being flowed out by inside transformer heat dissipation wind channel in the transformer case of closing, make transformer building ring
Border temperature reduces, and is advantageous to bulk convection, the radiation cooling of dry-type transformer, so as to realize it is efficient to dry-type transformer coil,
The air blast cooling cooling of cleaning, the cooling activation control of the air-duct-type air-conditioner are controlled by two sets of autonomous control systems：First, wind
Tube-type air conditioner carries the indoor environment NTC of temp testing controlling system to switchgear house or transformer station's indoor temperature detection, according to imposing a condition
Control the start and stop of air-duct-type air-conditioner；Second, dry-type transformer coil temp testing controlling system coil temperature transducer PT100 is to dry
Formula transformer coil temperature is detected, and according to the control auxiliary reclay that imposes a condition, is switched to the simulation special TEMP of air-conditioning
Device circuit controls the start and stop of air-duct-type air-conditioner.
A kind of described device to be cooled using air-duct-type air-conditioner installation guide duct to dry-type transformer, the wind of described device
Tube-type air conditioner refrigeration start-stop control system and auxiliary reclay are switched to be passed with the special temperature of accurate multiturn potentiometer simulation air-conditioning
Sensor circuit works：
(a) air-conditioning dedicated temperature sensor is negative tempperature coefficient thermistor, abbreviation NTC, its resistance raise with temperature and
Reduce, reduce and increase with temperature, resistance during 25 DEG C of nominal resistance is generally 10 K Ω -50K Ω；
(b) generally air-conditioner temperature setting range is -30 DEG C, and air-conditioning refrigeration when circumstance temperature is less than 15 DEG C does not work, and circumstance temperature is high
Heat and do not work when 30 DEG C；
(c) normal coil detection temperature is 45 DEG C or so during dry-type transformer no-load running, line when dry-type transformer is run
Circle detection temperature cannot be directly used to control the start and stop of air-conditioning；
(d) Temperature Controller for Dry-Type Transformer detects dry-type transformer coil temperature using PT100 temperature sensors, when
Temperature value higher than sets target value and return difference value and when, dry Transformer Temperature Controller device internal relay KA1 coils obtain that electric its is normal
Contact KA1 closures are opened, switching auxiliary reclay KA6 obtains electric work, is serially connected with two couple in air-conditioning dedicated temperature sensor NTC loops
Normally-closed contact KA6-1, KA6-2 disconnect, while are connected to two couples of normally opened contact KA6- in air-conditioning dedicated temperature sensor NTC loops
3rd, KA6-4 is closed, and air-duct-type air-conditioner enabling signal is switched to simulation air-conditioning dedicated temperature sensor circuit, starting of air conditioner, starts
Refrigeration work；When dry-type transformer coil temperature, which is reduced to sets target value, subtracts the temperature value of return difference value, dry-type transformer
Temperature controller internal relay KA1 coil losing electricities its normally opened contact KA1 is disconnected by being closed into, and auxiliary reclay KA6 dead electricity, is serially connected with
Two couples of normally-closed contacts KA6-1, KA6-2 in air-conditioning dedicated temperature sensor NTC loops reply closure state, while are connected to air-conditioning
Two couples of normally opened contacts KA6-3, KA6-4 in dedicated temperature sensor NTC loops are disconnected by being closed into, air-duct-type air-conditioner enabling signal
Air-conditioning dedicated temperature sensor circuit is returned to, air-conditioning is stopped；
(e) accurate multiturn potentiometer R resistance is adjusted to be slightly less than 26 DEG C of cooling activation temperature set by air-duct-type air-conditioner
When temperature sensor resistance, now wind pipe type is empty if simulation air-conditioning dedicated temperature sensor is switched to by auxiliary reclay
Displays temperature is adjusted to be slightly above 26 DEG C, the temperature value is set according to actual conditions.
A kind of described device to be cooled using air-duct-type air-conditioner installation guide duct to dry-type transformer, the wind of described device
Selection, installation and the start and stop parameter setting of tube-type air conditioner be：
(a) volume size of transformer room and the heat production of switchgear house or transformer station according to where treating cooling dry type transformer
Amount, select the air-duct-type air-conditioner of appropriate refrigerating capacity；
(b) air duct type air conditioning indoor machine（2）It is installed on nearby near dry-type transformer, air supplying distance is more short-acting, and rate is higher,
The cooling-down effect of dry-type transformer coil is better；
(c) air-duct-type air-conditioner air outlet installation plenum chamber（3）, separate six guide ducts（14、15、16、17、18、19）Point
Three groups of coils of dry-type transformer are not communicated to（A phase, B phase, C phase）Heat dissipation channel Xia Kou positions；
(d) setting of air-duct-type air-conditioner start and stop parameter：
First, air-duct-type air-conditioner carries the indoor circumstance temperature NTC of temp testing controlling system to switchgear house or transformer station's indoor temperature inspection
Survey, under air-duct-type air-conditioner Automatic-cooling state, it is 26 DEG C of temperature values according to reality to set air-duct-type air-conditioner cooling activation temperature
Border situation setting；
Second, dry-type transformer coil temp testing controlling system, under air-duct-type air-conditioner Automatic-cooling state, simulation air-conditioning is special
The resistance size of accurate multiturn potentiometer R in temperature sensor circuit is adjusted to be slightly less than 26 DEG C of air-duct-type air-conditioner temperature, should
The resistance of temperature sensor when temperature value is set according to actual conditions, concurrently set dry-type transformer coil temp testing controlling system and open
Stop desired value as 50 DEG C, start and stop target return difference value is 5 DEG C, and now dry-type transformer coil temp testing controlling system detection temperature reaches
Cooling activation at 55 DEG C, refrigeration stops when coil temperature is down to 45 DEG C.
A kind of purposes for installing the device that guide duct cools to dry-type transformer additional using air-duct-type air-conditioner of the present utility model,
Be by become in switchgear house the accurate control of dry-type transformer actuating coil cool, so as to reduce electric energy loss, effectively extend
Dry-type transformer service life, voltage 35kV and following is applied to, individual capacity 2500kVA and following change, power distribution station are done
The cooling control of formula transformer, so as to reduce electric energy loss, effectively extend dry-type transformer service life, while improve dry type change
The band of depressor is loaded onto few 30%, dry-type transformer quantity is rationally reduced in the case of safe and reliable, so as to save dry type transformation
Device basic charge as per installed capacity is paid.
After a kind of device to be cooled using air-duct-type air-conditioner installation guide duct to dry-type transformer of the present utility model
Achieve unexpected good result：
1st, using a kind of device to be cooled using air-duct-type air-conditioner installation guide duct to dry-type transformer of the present utility model
The coil temperature for the dry-type transformer that capacity and load are larger and load variations are larger is accurately controlled afterwards, can be had
Effect increases the service life.
The design nominal load rate of dry-type transformer is usually 80%, i.e., dry-type transformer is its capacity in institute's bringing onto load
When 80%, transformer can be reached its design and used in the case where gravity-flow ventilation cools down with long-term economic, reliable and stable operation
The life-span time limit.The material of manufacture dry-type transformer has metal material and the major class of insulating materials two.Metal material is typically resistant to higher
Temperature is without damaging, but insulating materials gradually loses original mechanical performance and insulating properties for a long time under electric field and high temperature action
Can and aging, or even can aged deterioration quickly after temperature exceedes certain certain value.According to epoxy resin dry type transformer factory
Family provides technical data and shown, by insulating materials epoxy resin between each circle coil of epoxy resin dry type transformer winding
Filling, therefore, the aging speed of epoxy resin dry type transformer depends primarily on the aging speed of insulating materials epoxy resin, institute
With in a sense it may be said that the life-span of transformer is exactly the life-span of insulating materials.It is old due to insulating materials epoxy resin
Change the operating temperature that speed depends on insulating materials epoxy resin, so dry-type transformer user is in use except raising work(
Only extend the service life of dry-type transformer by taking effective cooling measure outside rate factor, make its economic benefit most
Bigization.
In design and manufacture, dry-type transformer allows temperature rise to be to weigh an important indicator of dry-type transformer performance, state
Family's standard《Dry-type transformer》The temperature limit of GB6450-1986 dry-type transformers is made that regulation, transformation according to temperature classification
The permission temperature rise of device can be divided into six grades of A, E, B, F, H, C, and each grade allows temperature rise standard as shown in the table：
Each grade of dry-type transformer allows temperature rise standard
| The class of insulation | A | E | B | F | H | C |
| Maximum permissible temperature（℃） | 105 | 120 | 130 | 155 | 180 | 220 |
| Winding temperature rise limit value（K） | 60 | 75 | 80 | 100 | 125 | 150 |
| Performance reference temperature（℃） | 80 | 95 | 100 | 120 | 145 | 170 |
The country is F levels and H levels using the main flow class of insulation of dry-type transformer at present.
For epoxy resin structural, in practice it has proved that all follow Arrhenius Arrhenius laws（The also referred to as thermal life
Equation LOG (t)=a+b*1/T), i.e., famous " time temperature equivalence " principle, be exactly in brief：To specific high polymer material or
Linear relationship be present in structure, the inverse for the absolute temperature that its life time t logarithm and material are born.So material bearing temperature
Per the down or up differential temperature degree HIC of life-span half, its life-span accordingly extends（Or shorten）One times.Different materials is diagnosed by identical
The half differential temperature degree HIC that the factor or identical material are obtained by different diagnostic factros is different,.Thus, it is possible to utilize epoxy resin height
The data that warm accelerated ageing process obtains are come
Practice and research show, if winding can continuously maintain 95 DEG C of temperature, it is ensured that transformer made with 20 years
Use the life-span.According to temperature and the relation in life-span, so-called 8 DEG C of rule can be also drawn：Based on the life-span at above-mentioned temperature,
Winding temperature often raises 8 DEG C, and the service life of transformer just shortens 1/2.
According to 10 degree of rules of thermal life of epoxy resin insulation material system, thus it is speculated that, assess epoxy resin dry type transformer
For insulated working temperature at 95 DEG C, epoxy resin dry type transformer normal service life is asphalt mixtures modified by epoxy resin under conditions of 20 years
Life situations of the fat dry-type transformer in cold operation, epoxy resin dry type transformer insulated working temperature take 90 DEG C, stay 5 DEG C
Surplus：
For transformer insulated operating temperature at 95 DEG C, transformer service life is 20 years；
For transformer insulated operating temperature at 80 DEG C, transformer service life is 40 years；
For transformer insulated operating temperature at 70 DEG C, transformer service life is 80 years；
For transformer insulated operating temperature at 60 DEG C, transformer service life is 160 years.
In actual applications, it is discrete due to dry-type transformer structure type in itself, loss level, material and processing
Property, the distribution of electric field and power, electrodynamic effect and strong and weak, running environment etc. some unpredictable factors, so dry
The actual life of formula transformer is influenceed by many factors, and the transformer insulated operating temperature of the above is at 60 DEG C, transformer
Service life is that the calculated value of 160 years is only for reference, and we are using air-duct-type air-conditioner using one kind of the present utility model
Install the device that cools to dry-type transformer of guide duct additional, realize to capacity and load is larger and load variations are larger dry type
The coil temperature of transformer is accurately controlled under 45-55 DEG C of state of ideal temperature, and the actual life of dry-type transformer presses 160
The 25-40% in year is calculated, assessed, and leaves enough margins of safety, it should be reasonable, safe and reliable.
By using a kind of dress to be cooled using air-duct-type air-conditioner installation guide duct to dry-type transformer of the present utility model
Put, realize and ideal is accurately controlled in the coil temperature of capacity and load is larger and load variations are larger dry-type transformer
Under 45-55 DEG C of state of temperature, the principal element " temperature " of influence dry-type transformer service life is set to be changed into secondary cause, according to ring
10 degree of rules of oxygen tree fat insulating materials system, thus it is speculated that, assess dry-type transformer, transformer service life up to 40-64, from
And the service life of dry-type transformer is extended to greatest extent.
2nd, using a kind of device to be cooled using air-duct-type air-conditioner installation guide duct to dry-type transformer of the present utility model
After effectively improve epoxy resin dry type transformer load capacity at least 30%.
GB/T1094.12-2013《Dry-type power transformer loads directive/guide》Dry type in the case of being cooled down to natural air circulation
The various situations of the load capacity of power transformer are calculated, and standard indicates dry-type power transformer no more than insulation
The principle how run under the allowable value of heat ageing.The permissible value of insulating thermal aging is in specified fortune with dry-type power transformer
Insulation occurs what is determined during cause thermal damage during being run at a temperature of on the basis of row condition and ambient temperature.And dry-type power
The design of transformer is also to be designed according to relevant national standard regulation.Because the insulating thermal aging of dry-type transformer depends on transformer
The rise of coil temperature, the rise of transformer coil temperature depends on the increase of electric current, and the increase of electric current is depending on load
Increase, therefore, improving the fundamental way of dry-type transformer load capacity has and only to the timely radiating of dry-type transformer coil, drop
Low temperature, the load capacity of dry-type transformer is improved on the premise of safety, economy.
Dry type transformation is improved after the method to cool using air-duct-type air-conditioner installation guide duct to epoxy resin dry type transformer
The estimation of device load capacity：
（1）The model and relevant parameter of air-duct-type air-conditioner
Haier KFR-260EW/H730A type 10P air-duct-type air-conditioners, refrigerating capacity 26000W, refrigeration input 10kW power, fit
With area 110-160 ㎡.
（2）Epoxy resin dry type transformer producer provides SCB10-1600/10 type epoxy resin dry type transformers in difference
Heating power curve map under load, as shown in Figure 7, and the load factor of SCB10-1600/10 type epoxy resin dry type transformers
Approximate function formula between heating power：
P=12000×（η-10%）+3600
Wherein P is heating power of the dry-type transformer when load factor is η, and unit is joule/second（J/s）
η is the load factor of dry-type transformer
（3）Because erg-ten=1 watt-second, then 1 watt=erg-ten/second, i.e. 1W=1J/s
So 10P air-duct-type air-conditioners refrigerating capacity is the J/s of 26000W=26000
Assuming that the effective rate of utilization of 10P air-duct-type air-conditioner refrigerating capacitys is 50%, then 10P air-duct-type air-conditioners unit interval（Often
Second）Interior replaceable heat is the J of 26000 J × 50%=13000
It is 130% to assume epoxy resin dry type transformer load factor simultaneously, is now passed through
The J/s of P=18000, i.e. now unit interval（It is per second）Interior caloric value is 18000 J
From assumed above：When epoxy resin dry type transformer load factor be 130%, while 10P air-duct-type air-conditioners freeze
Work and its effective rate of utilization be 50% when, the heat that dry-type transformer is not replaced away is：18000 J—13000 J=
5000 J
Now pass through the function between the load factor and heating power of SCB10-1600/10 type epoxy resin dry type transformers
Relational expression P=12000 ×（η-10%）+ 3600 can calculate the air-duct-type air-conditioner unit interval（It is per second）The heat not being replaced away inside
5000 J are measured equivalent to the caloric value that epoxy resin dry type transformer load factor is 21.7%.
Generally it is mounted in transformer case, in closed state（GB1094.11-2007 3.4 closes dry type
Transformer refers to be placed in the shell of ventilation, the transformer cooled down by extraneous air circulation）, therefore air-duct-type air-conditioner system
It is substantially all to dissipate in the transformer case of closing after cold air flows out via transformer heat dissipation wind channel caused by cold, make change
Depressor operating ambient temperature reduces, and is advantageous to bulk convection, the radiation cooling of dry-type transformer.
Analysis, calculating more than, guide duct is installed additional using air-duct-type air-conditioner by using one kind of the present utility model
To the device of dry-type transformer cooling, force to make the coil temperature of dry-type transformer be accurately controlled in ideal temperature when air-conditioning is air-cooled
Under 45-55 DEG C of state, it is economic, efficient, safety that dry-type transformer improves at least 30% using load capacity.
3rd, using a kind of device to be cooled using air-duct-type air-conditioner installation guide duct to dry-type transformer of the present utility model
Energy-conservation and economic benefit protrude notable afterwards.
（1）Dry-type transformer cooling overall work temperature is effectively reduced, reduces load loss, energy-saving effect is notable.
The load loss of transformer operates therewith the rise of temperature and increased.Under same loading condition, running temperature is every
10 DEG C are raised and lowered, load loss increases or decreases about 3.93% for copper winding.Because load loss and winding
Resistance is directly proportional, and the resistance of winding increases or decreases with being raised and lowered for temperature.
After effectively reducing operating temperature below with 1600kVA dry-type transformers, in a life cycle 5 of air-duct-type air-conditioner
The reduction situation of load loss is calculated in year：
From transformer stochastic technique data：At 120 DEG C, its load loss of nominal load is on dry-type transformer band
12 kW, 100 DEG C are selected during calculating；
When using a kind of device to be cooled using air-duct-type air-conditioner installation guide duct to dry-type transformer of the present utility model
Afterwards, the coil temperature of dry-type transformer is accurately controlled in the range of 45-55 DEG C of ideal temperature, 60 DEG C are selected during calculating, dry type
Transformer load loss can be reduced at least：
（100 DEG C -60 DEG C）×3.93%/10℃×12kW=1.8864 kW
In a life cycle 5 years for air-duct-type air-conditioner, the air-conditioning work time can be taken by itself 24 hours one
The electric energy saved of reduction of half computational load loss is：
1.8864 kilowatts × 12 hour/day × 30 day/month × kilowatt hour of December/year × 5 year=40746.24
Can power cost saving expenditure：40746.24 kilowatt hour × 0.67 yuan/kilowatt hour=27299.98 yuan
（2）Dry-type transformer quantity is rationally reduced in the case of safe and reliable, it is substantially electric so as to save dry-type transformer
Take expenditure, economic benefit protrudes.
Case：The zinc-plated workshop of my company is originally using two 1600kVA dry-type transformer, its safe and reliable operation when institute
Bringing onto load general power is 1600 × 2 × 80%=2560kW, and the general power by the zinc-plated workshop all devices of theoretical calculation is
2114.9kW, and become, distribution design personnel design when on the one hand to consider dry-type transformer long-term safety stable operation, it is another
From the aspect of leave certain surplus, to meet the increased demand of later stage load.For design angle, the general power of all devices
For 2114.9kW, the dry-type transformer for being equipped with two 1600kVA is that there is no problem.But in actual use, load is simultaneously
Non- total power comes into operation simultaneously, and by statistics and data analysis, utilization rate can only achieve while generally load
70%。
Here, actual use situation is calculated, contrast it is as follows：
（a）If now two 1600kVA dry-type transformer puts into operation simultaneously, the load factor of two dry-type transformers
For：
2114.9kW×70%÷（1600kVA×2）×100%=46.3%
In this case dry-type transformer utilization rate is extremely low, and energy waste is serious, uneconomical.
（b）If the dry-type transformer for the 1600kVA that now puts into operation, stop transport one, then this dry-type transformer is negative
Load rate is：
2114.9kW×70%÷1600kVA×100%=92.5%
In this case dry-type transformer economy, efficiently is right although dry-type transformer coil temperature reaches as high as 95 DEG C
It is to belong to normal working temperature for the epoxy resin dry type transformer " 125 DEG C of winding average temperature rising limit value " of H class B insulations.
（c）Using a kind of dress to be cooled using air-duct-type air-conditioner installation guide duct to dry-type transformer of the present utility model
Put, the coil temperature of dry-type transformer is accurately controlled under 45-55 DEG C of state of ideal temperature during air blast cooling, by dry type transformation
Device improves 30% using load capacity and calculated, and now the theoretical duty rate of this dry-type transformer is：
2114.9kW×70%÷【1600kVA×（1+30%）】×100%=71.2%
In this case the utilization of dry-type transformer is economical, efficient, safe.
（3）Using a kind of dress to be cooled using air-duct-type air-conditioner installation guide duct to dry-type transformer of the present utility model
Put, the coil temperature of dry-type transformer is accurately controlled in mixed economy under 45-55 DEG C of state of ideal temperature
Performance analysis：
（a）10P air-duct-type air-conditioner one-time investment expenses are installed：About 20000 yuan, air-duct-type air-conditioner service life is pressed 5 years
Calculate；
The fixed cost disbursement of air-duct-type air-conditioner every year on average is：
20000 yuan of yuan/year of ÷ 5 years=4000.
（b）Haier's KFR-260EW/H730A 10P wind pipe type air-duct-type air-conditioner relevant parameters：Refrigerating capacity 26000W；Refrigeration
Rated power 10kW;
（c）10P air-duct-type air-conditioners are calculated for 24 hours by the work daily of maximal work time, average often to spend 0.67 yuan of electricity price
Basic operation power charge is 10P air-duct-type air-conditioners every year：
10 kilowatts × 24 hour/day × 30 day/month × 0.67 yuan/kilowatt hour × December/year=57888 yuan/year
（d）Unloaded power consumption and the electricity charge every year of one 1600kVA dry-type transformer calculate (can by transformer technology data
Know：The kW of dry-type transformer open circuit loss 3, take transformer load loss after loading and will be increased to 12 kW)：
3 kilowatts × 24 hour/day × 30 day/month × December/year=25920 kilowatt hours/year
The unloaded power consumption electricity charge are one 1600kVA dry-type transformer every year：
25920 kilowatt hour × 0.67 yuan/kilowatt hour=17366.4 yuan
（e）The annual fixation electricity charge of 1600kVA dry-type transformers are:
1600 kVA × 19 yuan/kVA December the month/year=364800 yuan/year;
（f）At one of air-duct-type air-conditioner after the device to be cooled using air-duct-type air-conditioner installation guide duct to dry-type transformer
Load loss power cost saving expenditure in life cycle 5 years：It is 27299.98 first
Therefore, every year at least can power cost saving after disabling a transformer and a 10P air-duct-type air-conditioner being installed：
364800-4000 yuan/years-57888 yuan/years of+17366.4 yuan/years of yuan/year
=320278.4 yuan/year
Fund can be saved in the life cycle of an air-duct-type air-conditioner：
320278.4+27299.98 yuan of yuan/year × 5 year=1628691.98 yuan
Shown by data above, guide duct is installed additional to dry type transformation using air-duct-type air-conditioner using one kind of the present utility model
Energy-saving effect is notable after the device of device cooling, and economic benefit protrudes.
The utility model is made one and described in detail by above embodiment, described above, is the preferable real of the utility model
Case is applied, it is when the utility model practical range can not be limited, i.e., all to make equivalent changes and modifications according to the application scope, all should be still
Belong in the utility model covering scope.
Claims (1)
- A kind of 1. device to be cooled using air-duct-type air-conditioner installation guide duct to dry-type transformer, it is characterised in that the use It is to utilize cold air caused by air-duct-type air-conditioner refrigeration that air-duct-type air-conditioner, which installs the device that guide duct cools to dry-type transformer additional, Plenum chamber is connected to via pipeline to lead to below dry-type transformer heat dissipation channel by guide duct, is then dissipated via inside transformer All dissipated after hot-flow flue outflow in the transformer case of closing, the air-duct-type air-conditioner air outlet installs plenum chamber（3）, separate Six guide ducts（14、15、16、17、18、19）It is respectively communicated to three groups of coils of dry-type transformer（A phase, B phase, C phase）Radiating Passage Xia Kou positions；The cooling activation control of the air-duct-type air-conditioner is controlled by two sets of autonomous control systems：First, wind pipe type is empty The indoor environment NTC for carrying temp testing controlling system is adjusted to switchgear house or transformer station's indoor temperature detection, according to the control wind that imposes a condition The start and stop of tube-type air conditioner；Second, dry-type transformer coil temp testing controlling system coil temperature transducer PT100 is to dry type transformation Device coil temperature is detected, and according to the control auxiliary reclay that imposes a condition, is switched to simulation air-conditioning dedicated temperature sensor circuit Control the start and stop of air-duct-type air-conditioner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720425357.3U CN207009220U (en) | 2017-04-21 | 2017-04-21 | A kind of device to be cooled using air-duct-type air-conditioner installation guide duct to dry-type transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720425357.3U CN207009220U (en) | 2017-04-21 | 2017-04-21 | A kind of device to be cooled using air-duct-type air-conditioner installation guide duct to dry-type transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207009220U true CN207009220U (en) | 2018-02-13 |
Family
ID=61443167
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720425357.3U Active CN207009220U (en) | 2017-04-21 | 2017-04-21 | A kind of device to be cooled using air-duct-type air-conditioner installation guide duct to dry-type transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207009220U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112373265A (en) * | 2020-10-29 | 2021-02-19 | 华南理工大学 | Automobile air conditioning system with air energy-carrying radiation air conditioning tail end and control method thereof |
| CN112557078A (en) * | 2020-12-02 | 2021-03-26 | 西南交通大学 | Performance evaluation method for cooling system of dry-type transformer |
-
2017
- 2017-04-21 CN CN201720425357.3U patent/CN207009220U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112373265A (en) * | 2020-10-29 | 2021-02-19 | 华南理工大学 | Automobile air conditioning system with air energy-carrying radiation air conditioning tail end and control method thereof |
| CN112557078A (en) * | 2020-12-02 | 2021-03-26 | 西南交通大学 | Performance evaluation method for cooling system of dry-type transformer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106960719B (en) | Transformer Cooling control method and the transformer cooling system for applying it | |
| CN103388856B (en) | Multi-online air-conditioning system and start heating method fast | |
| CN108037780B (en) | Oil-immersed transformer cooling control method based on temperature rise and load factor | |
| CN103779059B (en) | A kind of dynamic compatibilization method of oil-filled transformer | |
| CN201497095U (en) | Energy-saving cooling device with accurate air supply for machine room air conditioning system | |
| CN101769576B (en) | Total energy-saving environmental base station air-conditioning | |
| CN207009220U (en) | A kind of device to be cooled using air-duct-type air-conditioner installation guide duct to dry-type transformer | |
| CN102889650A (en) | Integral combination type computer room air conditioning unit and control method thereof | |
| CN201804282U (en) | Circulating cooling water inlet water temperature drift control device for operation test of converter valve | |
| JP2010084963A (en) | Control device of heat source machine for air conditioner and control method for the same | |
| CN106920641B (en) | A method of using air-duct-type air-conditioner to dry-type transformer forced cooling | |
| CN101520223A (en) | Energy-saving control method for auxiliary temperature-reducing heat-exchange device of air conditioner | |
| CN202977084U (en) | Dry-type transformer | |
| CN202149568U (en) | Cold-hot water set and central air-conditioning system | |
| CN204923613U (en) | Accurate control system of refrigerating output | |
| CN103591040B (en) | A kind of blower fan start-stop controlling method of Natural Oil Circulation Power air-cooled transformer | |
| CN203799786U (en) | Heat dissipation device of oil immersed transformer | |
| CN101832616A (en) | Operating method for improving energy efficiency ratio and performance coefficient of air conditioner | |
| CN202068704U (en) | Heat radiation cooling apparatus for air conditioner outdoor unit electric control box | |
| CN105181003A (en) | Strong-circulation energy-saving high current system for ice-melting tests of ultra-high voltage line | |
| Chien et al. | A study of waste-heat recovery unit for power transformer | |
| CN205783458U (en) | A kind of transformer station's master control room natural cold energy heat exchange device | |
| CN205049170U (en) | Energy -saving special high voltage transmission lines ice -melt of strong loop heavy current system for experiment | |
| CN110783066A (en) | Ground source cold pump type temperature control transformer heat dissipation device | |
| CN206116137U (en) | Thermostatic type dry -type transformer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |