CN110048499A - A kind of air-cooled transformer general-purpose current supply circuit - Google Patents
A kind of air-cooled transformer general-purpose current supply circuit Download PDFInfo
- Publication number
- CN110048499A CN110048499A CN201810045254.3A CN201810045254A CN110048499A CN 110048499 A CN110048499 A CN 110048499A CN 201810045254 A CN201810045254 A CN 201810045254A CN 110048499 A CN110048499 A CN 110048499A
- Authority
- CN
- China
- Prior art keywords
- relay
- normally closed
- contact
- current supply
- supply circuit
- 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.)
- Withdrawn
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
Abstract
The invention discloses a kind of air-cooled transformer general-purpose current supply circuits, it include: the first current supply circuit, the second current supply circuit and third current supply circuit, wherein, the third current supply circuit includes third power supply, PHR1 normally closed contact, PHR2 normally closed contact, the PHR1 normally closed contact and PHR2 normally closed contact series connection, it ensure that in the case where the first power supply and the equal switch failure of second source or power loss, the reliability of air-cooled control loop power supply, it can reduce due to power failure bring economic loss, contribute for the normal operation of air-cooled transformer.
Description
Technical field:
The present invention relates to transformer control technology field more particularly to a kind of air-cooled transformer general-purpose current supply circuits.
Background technique:
With the development of technology, in the substation project in construction using air-cooled transformer, the cooling dress of air-cooled transformer
It sets and mostly uses the wind based on PLC (Programmable Logic Controller, programmable logic controller (PLC)) control system greatly
Cold control loop.Entire cooling device access two independent AC power sources can optional one be working power, another is spare
Power supply, two power supplys can automatically switch.
However inventor has found in the implementation of the present invention, the relay in air-cooled control loop is only with alternating current
Source power supply even if providing backup power source, but is worked as to exist because having a power failure the unstable factor that circuit can not be made to work normally
When power loss also occurs for backup power source, will lead to air-cooled control loop be can not work normally, and influence cooling device and transformer just
Often operation, or even cause failure.
Summary of the invention:
The purpose of the present invention is to provide a kind of air-cooled transformer general-purpose current supply circuit, to solve it is above-mentioned in the prior art
There are the problem of.
The present invention is implemented by following technical solution:
The embodiment of the invention provides a kind of air-cooled transformer general-purpose current supply circuits, comprising:
First current supply circuit, the second current supply circuit and third current supply circuit, wherein first current supply circuit includes first
Power supply, QFA breaker, PHR1 relay, PHR1 normal opened contact, KA1 relay, change-over switch SS 1. -2., KA1 normal opened contact,
KMB normally closed contact, KMA relay, KMA normally open contact, the PHR1 normal opened contact are connected with the KA1 relay, and described
One power supply, the change-over switch SS 1. -2., the KA1 normal opened contact, the KMB normally closed contact and the KMA relay string
Connection；Second current supply circuit include second source, QFB breaker, PHR2 relay, PHR2 normal opened contact, KA2 relay,
Change-over switch SS 3. -4., KA2 normal opened contact, KA1 normally closed contact, KMA normally closed contact, KMB relay and KMB normally open contact, institute
PHR2 normal opened contact is stated to connect with the KA2 relay, the second source, the change-over switch SS 3. -4., the KA1 it is normal
Contact, the KA2 normal opened contact, the KMA normally closed contact is closed to connect with the KMB relay；The third current supply circuit packet
Include third power supply, PHR1 normally closed contact, PHR2 normally closed contact, the PHR1 normally closed contact and PHR2 normally closed contact series connection.
Further, first current supply circuit further include change-over switch SS 7. -8. with KA2 normally closed contact, described first
Power supply, the change-over switch SS 7. -8., the KA2 normally closed contact, the KA1 normal opened contact, the KMB normally closed contact and institute
State the series connection of KMA relay.
Further, second current supply circuit further include change-over switch SS 9. -10., the second source, the conversion
Switch SS 9. -10., the KA2 normal opened contact, the KMA normally closed contact connect with the KMB relay.
Further, when first power supply is powered air-cooled control loop, the change-over switch SS 1. -2. and
The change-over switch SS 3. -4. in an ON state.
Further, when first power supply is powered air-cooled control loop, QFA breaker makes in closing position
PHR1 relay excitation, PHR1 normal opened contact closure, with the concatenated KA1 relay excitation of the PHR1 normal opened contact, KA1
Normal opened contact closure, KA1 normally closed contact disconnect, the KMB relay loss of excitation, KMB normally closed contact closure, first power supply
By change-over switch SS 1. -2., the KA1 normal opened contact of closure and the KMB normally closed contact of closure make the KMA relay
Device excitation, so that KMA normally open contact be made to be closed.
Further, in second current supply circuit, the PHR2 relay, the KA2 relay loss of excitation, the PHR2
Normal opened contact, the KA2 normal opened contact are in an off state；In the third current supply circuit, at the PHR1 normally closed contact
In off-state.
Further, when first power supply is powered air-cooled control loop, QFB breaker makes in closing position
PHR2 relay excitation, PHR2 normal opened contact closure, it is normally opened with the concatenated KA2 relay excitation of the PHR2 normal opened contact, KA2
Contact 14 connects closure.
Further, when first power supply disappears, KA1 relay loss of excitation, KA1 normally closed contact closure, described second
Power supply by change-over switch SS 3. -4., the institute of the KA1 normally closed contact of closure, the KA2 normal opened contact of closure, closure
Stating KMA normally closed contact makes the KMB relay excitation, so that KMB normally open contact 4 be made to be closed.
Further, in the third current supply circuit, the PHR2 normally closed contact is in an off state.
Further, when the second source disappears, PHR2 normally closed contact closure, the PHR1 normally closed contact and
The PHR2 normally closed contact is in closed state, and the third current supply circuit starts to power to the air-cooled control loop.
Further, when first power supply or the second source restore electricity, the PHR1 normally closed contact or institute
The disconnection of PHR2 normally closed contact is stated, the third power supply stops powering to the air-cooled control loop, by described the of fault recovery
One current supply circuit or second current supply circuit are the power supply of air-cooled control loop.
Advantages of the present invention:
Increased in air-cooled transformer general-purpose current supply circuit provided in an embodiment of the present invention third power supply (uninterruptible power supply,
That is ups power) circuit, when the first power supply or second source work normally, third power supply does not come into operation, to reduce third
The common load of power supply, in the first power supply and second source all power loss, starting third power supply is powered to air-cooled control loop, with
Ensure the safe operation of air-cooled transformer.Automatic, the current supply circuit that flexibly switches provided through the embodiment of the present invention, ensure that
The reliability of air-cooled control loop power supply can reduce due to power failure bring economic loss, be air-cooled transformer
Normal operation contribute.
Detailed description of the invention:
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is air-cooled transformer general-purpose current supply circuit structural schematic diagram provided by the embodiment of the present invention；
Fig. 2 is air-cooled transformer general-purpose current supply circuit structural schematic diagram provided by the embodiment of the present invention.
Specific embodiment:
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The term used in embodiments of the present invention is only to be not intended to be limiting merely for for the purpose of describing particular embodiments
The present invention.In the embodiment of the present invention and the "an" of singular used in the attached claims, " described " and "the"
It is also intended to including most forms, unless the context clearly indicates other meaning.
The technical solution of the embodiment of the present invention is described in detail below.
Fig. 1, Fig. 2 are air-cooled transformer general-purpose current supply circuit structural schematic diagram provided in an embodiment of the present invention.As shown in Figure 1, Figure 2
It is shown, air-cooled transformer general-purpose current supply circuit provided in an embodiment of the present invention, comprising:
First current supply circuit 10, the second current supply circuit 20 and third current supply circuit 30.
First current supply circuit 10 include the first power supply, QFA breaker, PHR1 relay 1, PHR1 normal opened contact 7, KA1 after
Electric appliance 8, change-over switch SS 1. -2., KA1 normal opened contact 10, KMB normally closed contact 11, KMA relay 12, KMA normally open contact 3, institute
PHR1 normal opened contact 7 is stated to connect with the KA1 relay 8, first power supply, the change-over switch SS 1. -2., the KA1
Normal opened contact 10, the KMB normally closed contact 11 are connected with the KMA relay 12.
Second current supply circuit 20 include second source, QFB breaker, PHR2 relay 2, PHR2 normal opened contact 17, KA2 after
Electric appliance 18, change-over switch SS 3. -4., KA2 normal opened contact 14, KA1 normally closed contact, KMA normally closed contact 15,16 and of KMB relay
KMB normally open contact 4, the PHR2 normal opened contact 17 are connected with the KA2 relay 18, and the second source, the conversion are opened
Close SS 3. -4., the KA1 normally closed contact, the KA2 normal opened contact 14, the KMA normally closed contact 15 and the KMB relay
16 series connection.
Third current supply circuit 30 includes third power supply, PHR1 normally closed contact 5, PHR2 normally closed contact 6, and the PHR1 is normally closed to be connect
Point and PHR2 normally closed contact series connection.
Optionally, the first current supply circuit 10 further include change-over switch SS 7. -8. with KA2 normally closed contact, first power supply,
The change-over switch SS 7. -8., the KA2 normally closed contact, the KA1 normal opened contact 10, the KMB normally closed contact 11 with it is described
KMA relay 12 is connected.In the first Power Operating Process, if the change-over switch SS 1. -2. break down, can use institute
State change-over switch SS 7. -8. ensure that first power supply continues to power with the KA2 normally closed contact.
Optionally, the second current supply circuit 20 further include change-over switch SS 9. -10., the second source, the change-over switch
SS 9. -10., the KA2 normal opened contact 14, the KMA normally closed contact 15 connect with the KMB relay 16.In second source work
During work, if the change-over switch SS 3. -4. break down, can use the change-over switch SS 9. -10. ensure described
Two power supplys continue to power.
Specifically, first power supply is common power supply, i.e., described first power supply first to the air-cooled control loop into
Row power supply；The second source be backup power source, when first power supply disappear (such as the first power failure, first electricity
Source power loss etc.) when, the second source is automatically powered the air-cooled control loop；The third power supply is uninterrupted electricity
Source, when first power supply and the second source all disappear, the third power supply automatically will to the air-cooled control loop
It is powered；When first power supply or the second source restore electricity, the third power supply automatically exits from power supply.
Lower mask body introduces a kind of course of work of air-cooled transformer general-purpose current supply circuit of the embodiment of the present invention.
One, the first power supply of initial selected is powered air-cooled control loop
When the first power work, change-over switch SS 1.-contact 9 2. and SS 3.-contact 13 4. is closed, QFA open circuit
Device makes 1 excitation of PHR1 relay, its normal opened contact 7 closure in closing position, the line with the concatenated KA1 relay 8 of normal opened contact 7
Enclose excitation, its normal opened contact 10 closure.At this point, due to the disconnection of KA1 normally closed contact, 16 loss of excitation of KMB relay, its normally closed contact 11
In closed state, the first power supply by change-over switch SS 1.-10-KMB of normal opened contact of contact 9-KA1 relay 2. after
The normally closed contact 11 of electric appliance makes the coil magnetization of KMA relay 12, so that it is closed the normally open contact 3 of KMA relay 12, first
Power supply is connected bus and is powered to air-cooled control loop.
In the first power work, in the second current supply circuit 20, due to PHR2 relay 2,18 loss of excitation of KA2 relay,
Its normal opened contact 17,14 is in an off state, from being unable to make the coil magnetization of KMB relay 16, so second source is not
It can turn on bus, air-cooled control loop cannot be also powered.In third current supply circuit 30, since PHR1 relay is encouraged
Magnetic, normally closed contact 5 are disconnected, so third power supply not can turn on bus, cannot be also powered to air-cooled control loop.
When the first power supply is powered, circuit breaker Q FB makes 2 excitation of PHR2 relay, its normal opened contact in closing position
17 closures are connected with coil magnetization, its normal opened contact 14 of the concatenated KA2 relay 18 of normal opened contact 17.Due to KA1 at this time after
8 excitation of electric appliance, corresponding KA1 normally closed contact disconnects, so KMB coil 16 is unable to excitation, so second source not can turn on
Bus cannot still be powered air-cooled control loop.
Two, the first power supply, second source automatically switch
When the first power supply disappears (such as the first power failure or power loss), 1 loss of excitation of PHR1 relay, its normal opened contact 7
It disconnects, excitation, the disconnection of its normal opened contact 10 is unable to the concatenated KA1 relay 8 of normal opened contact 7, so that KMA relay 12
Loss of excitation, its normal opened contact 3 disconnect, the power-off of the first current supply circuit 10.At the same time, due to 8 loss of excitation of KA1 relay, its is corresponding
KA1 normally closed contact closure, in the second current supply circuit 20, second source by change-over switch SS 3.-4. 13-KA1 of contact relay
The normally closed contact 15 of the normally closed contact of device-KA2 relay normal opened contact 14--KMA relay encourages 16 coil of KMB relay
Magnetic, so that the normally open contact 4 of KMB relay 16 be made to be closed, second source is connected bus and is powered to air-cooled control loop.
In second source work, in third current supply circuit 30, due to PHR2 relay excitation, normally closed contact 6 is disconnected
It opens, so third power supply not can turn on bus, air-cooled control loop cannot be also powered.
After the first power failure is eliminated, 1 excitation of PHR1 relay, its normal opened contact 7 closure are gone here and there with normal opened contact 7
The coil magnetization of the KA1 relay 8 of connection, its normal opened contact 10 closure.At this point, due to 8 excitation of KA1 relay, its corresponding KA1
Normally closed contact disconnects, the power-off of the second current supply circuit 20.Since 16 loss of excitation of KMB relay, its normally closed contact 11 are in closed state,
First power supply by change-over switch SS 1.-normally closed the connecing of normal opened contact 10-KMB relay of contact 9-KA1 relay 2.
Point 11 makes the coil magnetization of KMA relay 12, so that the normally open contact 3 of KMA relay 12 be made to be closed, the first power supply connects bus
Air-cooled control loop is powered.
Three, third power supply is automatically powered air-cooled control loop
When the first power supply and second source disappear, PHR1 relay 1 and PHR2 relay 2 are lost magnetism, normal opened contact
7, normal opened contact 17 automatically disconnect, respectively with normal opened contact 7, the concatenated KA1 relay 8 of normal opened contact 17 and KA2 relay 18
Loss of excitation, KA1 normal opened contact, KA2 normal opened contact disconnect, so that the coil of KMA relay 12, KMB relay 16 cannot encourage
Magnetic, the first power supply and second source not can turn on bus and be powered to air-cooled control loop.
At this point, since PHR1 relay 1 and PHR2 relay 2 lose magnetism, so PHR1 relay and PHR2 relay
Normally closed contact 5,6 is closed, and third power supply automatically accesses air-cooled control loop by the normally closed contact 5,6 of PHR1, PHR2, to air-cooled
Control loop is powered.
Four, third power supply, which automatically exits from, is powered air-cooled control loop
After the first power supply or second source Failure elimination, due to 2 excitation of PHR1 relay 1 or PHR2 relay, institute
It will disconnect with the normally closed contact 5 or 6 of PHR1 relay or PHR2 relay, third power supply not can turn on bus, to move back automatically
Air-cooled control loop is powered out, air-cooled control loop is carried out by the first power supply or second source of fault recovery
Power supply.
In conclusion air-cooled transformer general-purpose current supply circuit provided in an embodiment of the present invention, in the first power supply or the second electricity
When source works normally, third power supply does not access air-cooled control loop, i.e., is not powered to air-cooled control loop；In the first power supply
When all disappearing with second source, third power supply automatically accesses control loop, is powered to air-cooled control loop；When the first power supply
Or second source, when restoring electricity, third power supply can automatically exit from control loop again, reduce third power supply (uninterrupted electricity
Source) common load, ensure that the reliability of air-cooled control loop power supply power supply, reduce due to power supply failure bring
Economic loss contributes for transformer normal operation.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of air-cooled transformer general-purpose current supply circuit characterized by comprising
First current supply circuit, the second current supply circuit and third current supply circuit, wherein
First current supply circuit include the first power supply, QFA breaker, PHR1 relay, PHR1 normal opened contact, KA1 relay,
Change-over switch SS 1. -2., KA1 normal opened contact, KMB normally closed contact, KMA relay, KMA normally open contact, the PHR1 is normally opened to be connect
Point is connected with the KA1 relay, first power supply, the change-over switch SS 1. -2., the KA1 normal opened contact, described
KMB normally closed contact is connected with the KMA relay；
Second current supply circuit include second source, QFB breaker, PHR2 relay, PHR2 normal opened contact, KA2 relay,
Change-over switch SS 3. -4., KA1 normally closed contact, KA2 normal opened contact, KMA normally closed contact, KMB relay and KMB normally open contact, institute
PHR2 normal opened contact is stated to connect with the KA2 relay, the second source, the change-over switch SS 3. -4., the KA1 it is normal
Contact, the KA2 normal opened contact, the KMA normally closed contact is closed to connect with the KMB relay；
The third current supply circuit includes third power supply, PHR1 normally closed contact, PHR2 normally closed contact, the PHR1 normally closed contact and
The PHR2 normally closed contact series connection.
2. general-purpose current supply circuit according to claim 1, which is characterized in that first current supply circuit further includes that conversion is opened
Close SS 7. -8. with KA2 normally closed contact, first power supply, the change-over switch SS 7. -8., the KA2 normally closed contact, described
KA1 normal opened contact, the KMB normally closed contact are connected with the KMA relay.
3. current supply circuit according to claim 1, which is characterized in that second current supply circuit further includes change-over switch SS
10. 9. the second source, the change-over switch SS 9. -10., the KA2 normal opened contact, the KMA normally closed contact with it is described
The series connection of KMB relay.
4. general-purpose current supply circuit according to claim 1, which is characterized in that when first power supply is to air-cooled control loop
When being powered, the change-over switch SS 1. -2. with the change-over switch SS 3. -4. in an ON state.
5. general-purpose current supply circuit according to claim 4, which is characterized in that when first power supply is to air-cooled control loop
When being powered, QFA breaker makes PHR1 relay excitation, PHR1 normal opened contact closure in closing position, normal with the PHR1
It opens the concatenated KA1 relay excitation of contact, KA1 normal opened contact closure, KA1 normally closed contact to disconnect, the KMB relay loses
Magnetic, KMB normally closed contact closure, first power supply by change-over switch SS 1. -2., closure the KA1 normal opened contact and close
The KMB normally closed contact closed makes the KMA relay excitation, so that KMA normally open contact be made to be closed.
6. general-purpose current supply circuit according to claim 4, which is characterized in that in second current supply circuit, the PHR2
Relay, the KA2 relay loss of excitation, the PHR2 normal opened contact, the KA2 normal opened contact are in an off state；Described
In third current supply circuit, the PHR1 normally closed contact is in an off state.
7. according to the described in any item general-purpose current supply circuits of claim 4-6, which is characterized in that when first power supply is to air-cooled
When control loop is powered, QFB breaker makes PHR2 relay excitation, PHR2 normal opened contact closure in closing position, with institute
State the concatenated KA2 relay excitation of PHR2 normal opened contact, KA2 normal opened contact 14 connects closure.
8. general-purpose current supply circuit according to claim 7, which is characterized in that when first power supply disappears, KA1 relay
Device loss of excitation, KA1 normally closed contact closure, the second source by change-over switch SS 3. -4., closure the KA1 normally closed contact,
The KA2 normal opened contact of closure, the KMA normally closed contact of closure make the KMB relay excitation, to keep KMB normally opened
Contact 4 is closed.
9. general-purpose current supply circuit according to claim 8, which is characterized in that described when the second source disappears
PHR2 normally closed contact closure, the PHR1 normally closed contact and the PHR2 normally closed contact are in closed state, and the third supplies
Electrical circuit starts to power to the air-cooled control loop.
10. general-purpose current supply circuit according to claim 9, which is characterized in that when first power supply or second electricity
When source restores electricity, the PHR1 normally closed contact or the PHR2 normally closed contact are disconnected, and the third power supply stops to the wind
Cold control loop power supply is the confession of air-cooled control loop by first current supply circuit or second current supply circuit of fault recovery
Electricity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810045254.3A CN110048499A (en) | 2018-01-17 | 2018-01-17 | A kind of air-cooled transformer general-purpose current supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810045254.3A CN110048499A (en) | 2018-01-17 | 2018-01-17 | A kind of air-cooled transformer general-purpose current supply circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110048499A true CN110048499A (en) | 2019-07-23 |
Family
ID=67273130
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810045254.3A Withdrawn CN110048499A (en) | 2018-01-17 | 2018-01-17 | A kind of air-cooled transformer general-purpose current supply circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110048499A (en) |
-
2018
- 2018-01-17 CN CN201810045254.3A patent/CN110048499A/en not_active Withdrawn
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20190723 |
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| WW01 | Invention patent application withdrawn after publication |