CN209328665U - The dry excitation transformer cooling device of distributed AC servo system - Google Patents
The dry excitation transformer cooling device of distributed AC servo system Download PDFInfo
- Publication number
- CN209328665U CN209328665U CN201821340798.4U CN201821340798U CN209328665U CN 209328665 U CN209328665 U CN 209328665U CN 201821340798 U CN201821340798 U CN 201821340798U CN 209328665 U CN209328665 U CN 209328665U
- Authority
- CN
- China
- Prior art keywords
- cooling
- transformer
- air switch
- blower
- dry
- 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
Landscapes
- Transformer Cooling (AREA)
Abstract
The utility model discloses a kind of dry excitation transformer cooling devices of distributed AC servo system, it is intended to provide a kind of distributed AC servo system cooling blower, reduction exciting transformer is because of the cooling device that overtemperature causes electricity generation system to be shut down caused by losing cooling, it includes air switch, air switch is connected one to one by cable and cooling blower, the connection type of air switch is parallel connection, air switch is connect by cable with contactor, contactor is connect with the temperature control equipment being located on dry excitation transformer, contactor and air switch are placed in power supply box, air switch quantity is N, the natural number that N is >=2, cooling blower is in addition to cooling to this phase transformer, also cooling is provided to other phase transformers by air hose, air hose is equipped with the valve of control connection.The utility model is applicable not only to dry excitation transformer, applies also for all dry-type transformers.
Description
Technical field
The utility model relates to dry-type transformer fields, in particular to a kind of dry excitation transformer
Cooling device.
Background technique
Exciting transformer is a kind of device exclusively for generator excited system offer three-phase AC excitation power supply, excitation system
System converts generator amature DC power supply for three phase mains by silicon-controlled, forms generator excitation magnetic field, passes through excitation system
System adjusts SCR Trigger Angle, achievees the purpose that adjust motor terminal voltage and idle.
The safe and stable operation of generator exciting transformer is to be from the premise of shunt excitation unit safety, stable operation
Generating set stable electric generation, the prerequisite to generate electricity at full capacity are the key that excitation system reliability services.
Currently used exciting transformer is dry excitation transformer, and cooling system is fairly simple, and the type of cooling is divided into
Natural air cooling (AN) and forced air are cooling (AF).When natural air cooling, transformer long-term under rated capacity can continuously be transported
Row.When forced air cooling, transformer output capacity can be improved 50% or more.Transformer ABC three-phase routinely configuration 4 when forced air cooling
Cooling blower, 4 cooling blowers are mounted on transformer bottom, and power supply wiring is connected using the concatenated mode of blower terminals, this
It is a kind of centrally connected power supply mode, occurs burning out failure inside 1 cooling blower, is series connection since all blowers are in bottom wiring
It connecting, faulty on entire circuit, can cause power supply can not restore, and it causes remaining 3 cooling blower while losing power supply, the phase
Transformer winding loses cooling system, and temperature is caused to increase, and equipment is in unhealthy condition at this time, if cannot replace in time cold
But blower will cause transformer and burn because iron core temperature is excessively high, and unit equipment failure is caused to stop transport, and then cause entire power generation system
The shutdown of system causes biggish economic loss.
Exciting transformer be high voltage installation (to power plants generating electricity and power supply for, be boundary with 6KV~7KV or so, it is above
For high-voltage electricity, below is low tension), replace cooling blower in the case where exciting transformer electrification, there are great personnel,
Equipment safety risk so shutdown is generally taken to handle such failure, but is shut down replacement failure blower and be will cause in power generation again
It is disconnected, adverse effect is caused to power grid.Therefore we need to improve the cooling system of dry excitation transformer, reduce excitation
Transformer because lose it is cooling caused by overtemperature shutdown cause electricity generation system to shut down bring economic loss.
Currently, we retrieve the open source literature of some cooling device for dry-type transformer, such as:
1. Chinese Patent Application No. CN201520150495.6, publication date on July 29th, 2015, this application discloses one
Kind dry-type transformer.It includes outer cover, it is characterized in that: the inner face in the two sides of outer cover is lower than at low-voltage side outlet 10cm height,
Two are respectively installed additional by fan supporter for the side blower to outer cover outlet wind, the fan supporter bolt fastening is in outer cover
On the pillar of two sides, three Fans are respectively installed in the high and low pressure side of transformer, and the fan parallel-connection of every side is in its ontology temperature-dropping fan
On.Disadvantage is that: since exciting transformer is compact-sized, space is limited, and the scheme of cooling blower is installed not in side
It is applicable in；It is connected between transformer without cooling duct, if separate unit or the damage of more Fans, cause cooling air quantity insufficient, will cause
Inside transformer temperature increases, and has the risk for causing equipment overtemperature to shut down.
2. Chinese Patent Application No. CN201420746607.X, publication date on March 11st, 2015, this application discloses one
Kind dry-type transformer cooling device, it includes pedestal, dry-type transformer and blower, and at least one set of wind is equipped on the pedestal
Machine is equipped with dry-type transformer above blower, and the periphery of dry-type transformer is provided with insulation wind deflector, the table for the wind deflector that insulate
Face is provided with multiple threading holes, and the threading hole that the lead of dry-type transformer passes through insulation wind deflector is connect with patch bay.Its deficiency
Be in: if there is blower damages, cause cooling air quantity insufficient, will cause the raising of inside transformer temperature, cause equipment super
The risk that temperature is shut down.
Utility model content
The utility model provides a kind of distributed AC servo system cooling blower in view of the above technical problems, reduce exciting transformer because
Lose the cooling cooling device for causing overtemperature that electricity generation system is caused to be shut down.
The utility model adopts the following technical solution to achieve the above object:
A kind of dry excitation transformer cooling device of distributed AC servo system, including air switch, the company of the air switch
Mode is connect as parallel connection, the air switch is connected one to one by cable and cooling blower.
The air switch is connect by cable with contactor, the contactor and the temperature being located on dry excitation transformer
Spend control device connection.
The contactor and air switch are placed in power supply box.
The air switch quantity is N, the natural number that the N is >=2.
The cooling blower provides the other phases of transformer by air hose in addition to providing cooling to this phase transformer, also cold
But, the air hose is equipped with the valve of control connection.
Working principle of the utility model is:
The utility model designs a kind of distributed cooling device, takes parallel operation to cooling blower, effectively prevent
Whole group blower caused by being shut down because of separate unit fan trouble all blowers power-off shut down, cause transformer because leading to internal temperature without cooling
Degree increases, the failure for bringing equipment overtemperature to shut down；Contactor is connect with the temperature control equipment being located on dry excitation transformer,
It can be realized and be automatically controlled according to temperature setting, started cooling blower when temperature is high, stop cooling blower when temperature is low, reduce cold
But the working time of blower reduces the maintenance replacement cost of cooling blower；A set of cooling is increased between cooling wind unit
Air hose opens the blower fan group and event of normal work when the shutdown of more Fans causes some single-phase transformer cooling air quantity deficiency
Hinder the valve on the cooling duct between blower fan group, so that the cooling wind unit between each phase transformer is together in series, even if single-phase
The blower fan group of transformer breaks down, it is also ensured that each single-phase transformer has enough cooling air quantities, improves cooled
The cooling effect of equipment, improves equipment operating environment, improves the reliability of transformer station high-voltage side bus, reduces the several of overtemperature shutdown
Rate.
The utility model compared with prior art the utility model has the advantages that
1. cooling blower is connected in parallel, equipment overall operation failure is effectively reduced.The utility model is used to cooling blower
The scheme of parallel operation in power supply box, all blower power-off stop caused by effectivelying prevent whole group blower to shut down because of separate unit fan trouble
Machine, cause transformer because without cooling cause internal temperature to increase, bring equipment overtemperature shut down as a result, improving cooled equipment
Operational reliability reduces unit because of the probability that excitation-transformation variable overtemperature is shut down.
2. the technical solution that the utility model uses tandem cooling, even if there is machine halt trouble in separate unit or more Fans,
The valve on the cooling duct between the blower fan group and failure blower fan group worked normally is opened, the cooling between each phase transformer is made
Blower fan group is together in series, it is also ensured that transformer has enough cooling air quantities, improves the cooling effect of cooled equipment, changes
Kind equipment operating environment, reduces the probability of transformer overtemperature shutdown.
3. maintenance is convenient, it is convenient for rapid-maintenance.The utility model connects air switch and cooling wind by way of in parallel
Machine, when cooling blower breaks down, as long as checking the state of the air switch in power supply box, so that it may quickly determine and event occurs
The cooling blower of barrier reduces the time of problem investigation, improves the speed of maintenance.
4. structure is simple, low cost.The utility model structure is simple, and not only installation simply, conveniently, is gone back low cost, adapted to
Property it is wide, have very high society generalization value.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Parts title and serial number in figure:
Power supply box 1, contactor 2, cable 3, air switch 4, cooling blower 5.
Specific embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments, but is not limited practical
Novel protection scope and application range:
Embodiment 1:
The utility model includes the connection type of 4,2 air switches 4 of air switch for parallel connection, and each air switch 4 is logical
Cable 3 is crossed to connect one to one with cooling blower 5.
In the present embodiment, since the connection of air switch 4 is parallel connection, and single air switch 4 and single cooling blower 5 are
It connects one to one, i.e. cooling blower 5 is also to be connected in parallel, therefore not will lead to 2 blowers same for the damage of single cooling blower
When shut down, transformer will not be caused to lose all coolings and internal heating causes overtemperature to be shut down.
Embodiment 2:
Difference from example 1 is that: the quantity of air switch 4 and cooling blower 5 is 3.
Embodiment 3:
With embodiment 2 the difference is that: as shown in Figure 1, the quantity of air switch 4 and cooling blower 5 be 4.
Embodiment 4:
With embodiment 3 the difference is that: air switch 4 is connect by cable 3 with contactor 2, the contactor 2 and
The temperature control equipment connection being located on dry excitation transformer.
In the present embodiment, a contactor 2 is set before air switch 4, contactor 2 is used to be switched on or switched off cooling
The circuit of the entire blower fan group of blower 5, contactor 2 realize automatic control with the temperature control setting being located on dry excitation transformer
System, starts cooling blower, stops cooling blower when temperature is low, reduce the working time of cooling blower, reduce when temperature is high
The maintenance replacement cost of cooling blower.
Embodiment 5:
With embodiment 4 the difference is that: contactor 2 and air switch 4 are placed in power supply box 1.
In the present embodiment, contactor 2 and air switch 4 are uniformly placed in power supply box 1, when event occurs for certain cooling blower
When barrier, as long as checking the state of the air switch in power supply box, so that it may quickly determine the cooling blower to break down, reduction is asked
The time for inscribing investigation, improve the speed of maintenance.
Embodiment 6:
With any of the above-described embodiment the difference is that: cooling blower 5 also passes through wind in addition to cooling to this phase transformer
Pipe provides cooling to the other phases of transformer, and air hose is equipped with the valve of control connection.
In the present embodiment, distributed AC servo system is realized, when breaking down, separate unit even more cooling blowers 5 occur
At this moment disorderly closedown can open the valve on the cooling duct between the blower fan group of normal work and failure blower fan group, make each
Cooling wind unit between phase transformer is together in series, as long as not all cooling blower 5 is shut down simultaneously, will not all lose all
Cooling, therefore improve equipment operating environment, improve the reliability of transformer station high-voltage side bus, reduce the probability that overtemperature is shut down.
Claims (5)
1. a kind of dry excitation transformer cooling device of distributed AC servo system, it is characterised in that: described including air switch (4)
The connection type of air switch (4) is parallel connection, and the air switch (4) is corresponded by cable (3) and cooling blower (5) to be connected
It connects.
2. the dry excitation transformer cooling device of distributed AC servo system according to claim 1, it is characterised in that: the sky
Air cock (4) is connect by cable (3) with contactor (2), temperature contactor (2) and be located on dry excitation transformer
Control device connection.
3. the dry excitation transformer cooling device of distributed AC servo system according to claim 2, it is characterised in that: described to connect
Tentaculum (2) and air switch (4) are placed in power supply box (1).
4. the dry excitation transformer cooling device of distributed AC servo system according to claim 1 or 3, it is characterised in that: institute
Stating air switch (4) quantity is N, the natural number that the N is >=2.
5. the dry excitation transformer cooling device of distributed AC servo system according to claim 4, it is characterised in that: described cold
But blower (5) is cooling outer except providing this phase transformer, also by air hose to the offer cooling of transformer other phases, on the air hose
Valve equipped with control connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821340798.4U CN209328665U (en) | 2018-08-20 | 2018-08-20 | The dry excitation transformer cooling device of distributed AC servo system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821340798.4U CN209328665U (en) | 2018-08-20 | 2018-08-20 | The dry excitation transformer cooling device of distributed AC servo system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209328665U true CN209328665U (en) | 2019-08-30 |
Family
ID=67705375
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821340798.4U Active CN209328665U (en) | 2018-08-20 | 2018-08-20 | The dry excitation transformer cooling device of distributed AC servo system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209328665U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117790117A (en) * | 2024-01-19 | 2024-03-29 | 西安交通大学 | Design method of start-stop scheme of air-cooled heat exchanger of transformer |
-
2018
- 2018-08-20 CN CN201821340798.4U patent/CN209328665U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117790117A (en) * | 2024-01-19 | 2024-03-29 | 西安交通大学 | Design method of start-stop scheme of air-cooled heat exchanger of transformer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201601609U (en) | Megawatt-level permanent magnetic direct-drive wind power generation current transformer | |
| CN201699472U (en) | Dual-power automatic switching circuit and isolating device thereof | |
| CN109742809B (en) | Multi-source complementary energy storage type power station security power supply system and control method thereof | |
| CN110912109A (en) | Low-voltage direct-current power supply and distribution equipment and method | |
| CN102777330A (en) | Independent water cooling device of large-scale megawatt-level wind generating set | |
| Li et al. | Development of power conditioning system (PCS) for battery energy storage systems | |
| Kim et al. | The operation experience of KEPCO UPFC | |
| CN209328665U (en) | The dry excitation transformer cooling device of distributed AC servo system | |
| CN205960668U (en) | Photovoltaic power plant is with energy -conserving protection switch device | |
| CN114400670A (en) | Voltage sag treatment device and implementation method | |
| CN106208153A (en) | A kind of power plant subsidiary engine tracking power source system | |
| CN203014354U (en) | Circuit for controlling auxiliary device of large units | |
| US5194803A (en) | Superconductive voltage stabilizer having improved current switch | |
| CN109412466A (en) | The compound start stop apparatus of turbine emergency DC lubricating and control method | |
| Suyono et al. | Improvement of voltage sag mitigation using dynamic voltage restorer (DVR) | |
| CN2567865Y (en) | DC bus structure type high-tension high-low-high high-tension frequency control of motor speed device | |
| US11594890B2 (en) | Protection system for limiting an impact of disruptions of an external electrical network on a local network | |
| CN112803580A (en) | Security power supply system with outlet circuit breaker and double-gas-turbine configuration and working method thereof | |
| CN105515476A (en) | Device and method for improving short-circuit overload capacity of brushless electro-magnetic shaft-driven power generation system | |
| CN220732381U (en) | Flexible control system of box-type transformer of photovoltaic power station | |
| Schottler et al. | Commercial application experiences with SMES | |
| CN219612435U (en) | Heat dissipation control system of high-voltage frequency converter | |
| CN105356501B (en) | A kind of novel double-fed fan motor unit fault traversing protection circuit | |
| CN207251192U (en) | A kind of generating set and its exciting transformer cooling blower electric power system | |
| CN219938230U (en) | Novel hydroelectric set excitation power cabinet fan control system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |