CN108063491A - Forced oil-circulated air-cooled transformer cooling control system - Google Patents
Forced oil-circulated air-cooled transformer cooling control system Download PDFInfo
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- CN108063491A CN108063491A CN201810000288.0A CN201810000288A CN108063491A CN 108063491 A CN108063491 A CN 108063491A CN 201810000288 A CN201810000288 A CN 201810000288A CN 108063491 A CN108063491 A CN 108063491A
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- 238000001816 cooling Methods 0.000 title claims abstract description 19
- 230000005611 electricity Effects 0.000 claims description 13
- 238000012544 monitoring process Methods 0.000 claims description 13
- 238000010586 diagram Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/085—Cooling by ambient air
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/12—Oil cooling
-
- 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
- H02J9/068—Electronic means for switching from one power supply to another power supply, e.g. to avoid parallel connection
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- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Relay Circuits (AREA)
- Protection Of Transformers (AREA)
Abstract
The present invention provides a kind of forced oil-circulated air-cooled transformer cooling control system, to solve forced oil-circulated air-cooled transformer cooling control system in the prior art can not accurately detect power contactor stick together failure the technical issues of.Including：Power monitor circuit, input terminal are connected respectively with I sections of power supplys and II sections of power supplys, and output terminal is connected with cooler；Power supply switching circuit, is connected with power monitor circuit, by the way that power monitor circuit is controlled to control the switching of I sections of power supplys and II sections of power supplys；Power transfer relay circuit is connected respectively with power monitor circuit and power supply switching circuit；Fault-signal indicates circuit, is connected respectively with power transfer relay circuit and power supply switching circuit.Compared with prior art, the present invention can accurate judgement power failure, and increase power supply switching circuit, make power supply switching more stablize, enrich fault-signal, checked and operated convenient for operating personnel.
Description
Technical field
The invention belongs to transformer Cooling technical field more particularly to a kind of forced oil-circulated air-cooled transformer cooling control systems
System.
Background technology
In order to ensure the normal operation of transformer, it is necessary to which cooling device aids in its operation, the cooling of existing high-power transformer
Equipment is mostly forced oil-circulation forced air cooler.Existing forced air cooler for power supply during use is avoided to break down, uses
Two sections of power supplys are powered, and one section spare, and one section of work, when a wherein segment fault, another section can put into operation.It is but existing
Air cooler control system in, when the failure of internal adhesion occurs in the main contactor of power supply, system not can determine that failure, cause defeated
Go out and there are problems that phase shortage or overvoltage, under-voltage to the voltage of cooler, cooler is caused to damage；Meanwhile two sections of electricity
The switching circuit in source is single, if breaking down, influences power supply switching, and then influences the normal operation of cooler and transformer；
In addition, when the main contactor of power supply breaks down, malfunction monitoring signal is indefinite, brings inconvenience to the operation of operating personnel, because
This, there is an urgent need for a kind of new forced oil-circulated air-cooled transformer cooling control systems.
The content of the invention
It can not accurate measurements electrical power contacts to solve forced oil-circulated air-cooled transformer cooling control system of the prior art
Device stick together failure the technical issues of, the present invention provides a kind of forced oil-circulated air-cooled transformer cooling control system.
In order to solve the above technical problems, forced oil-circulated air-cooled transformer cooling control system provided by the invention, including：
The system comprises：Power monitor circuit, input terminal are connected respectively with I sections of power supplys and II sections of power supplys, output terminal with
Cooler connects；Power supply switching circuit, is connected with power monitor circuit, by control power monitor circuit control I section power supplys with
The switching of II sections of power supplys；Power transfer relay circuit is connected respectively with power monitor circuit and power supply switching circuit；Failure is believed
Number instruction circuit, be connected respectively with power transfer relay circuit and power supply switching circuit；Wherein, power monitor circuit, including：
I sections of power cords L1, L2, L3 bridge the first air switch QF1, the coil and I of the first power monitoring relay KX1 successively thereon
The normally opened contact of section power supply main contactor KMM1；II sections of power cords L4, L5, L6, bridge successively thereon the second air switch QF2,
The normally opened contact of the coil of second source supervisory relay KX2 and II sections of power supply main contactor KMM2；Busbar voltage monitors relay
The coil of device KX3, input terminal and I sections of power supply main contactor KMM1 normally opened contacts output terminals and II sections of power supply main contactor KMM2
Normally opened contact output terminal connects, and output terminal is connected with cooler.
It is preferred that the power supply switching circuit, including：
I sections of power supply automatic control loops, I sections of busbar voltage open-phase protection circuits, input terminal pass through first fuse 1FU
It is connected with the firewire L1 of I sections of power supplys, output terminal is connected with zero curve N；
II sections of power supply automatic control loops, II sections of busbar voltage open-phase protection circuits, input terminal pass through second fuse
2FU is connected with the firewire L4 of II sections of power supplys, and output terminal is connected with zero curve N；
The I sections of power supply automatic control loop, including：
The first branch, input terminal by change-over switch CK1 3. -4. contact be connected with the output terminal of first fuse 1FU,
Output terminal is connected with zero curve N；Including：The normally opened contact of second intermediate relay K2, II sections of power supply main contactor KMM2 it is normally closed
Contact is sequentially connected；
The second branch, input terminal by change-over switch CK1 5. -6. contact be connected with the output terminal of first fuse 1FU,
Output terminal is connected with the second branch；Including：The normally opened contact of first intermediate relay K1, the normally closed of the 9th intermediate relay K9 are touched
The coil of point, I sections of power supply main contactor KMM1 is sequentially connected；The output terminal of I sections of power supply main contactor KMM1 coils and first
The tie point on road is arranged between II sections of power supply main contactor KMM2 normally-closed contacts and the second intermediate relay K2 normally opened contacts；
The I sections of power supply automatic control loop, further includes：Among the normally-closed contact and the tenth of second intermediate relay K2 after
The normally opened contact of electric appliance K10, input terminal are connected with the second intermediate relay K2 normally opened contact input terminals in the first branch, output
End is connected with the first intermediate relay K1 normally opened contact input terminals；
The I sections of busbar voltage open-phase protection circuit, including：In first power monitoring relay KX1 normally opened contacts, first
Between relay K1 coils be sequentially connected；
The II sections of power supply automatic control loop, including：
3rd branch, input terminal by change-over switch CK1 9. -10. contact be connected with the output terminal of second fuse 2FU,
Output terminal is connected with zero curve N；Including：The normally opened contact of first intermediate relay K1, I sections of the normally closed of power supply main contactor KMM1 are touched
Point is sequentially connected；The normally opened contact of first intermediate relay K1, the normally-closed contact of I sections of power supply main contactor KMM1 are sequentially connected；
4th branch, input terminal by change-over switch CK1 7. -8. contact be connected with the output terminal of the second molten device 2FU, output terminal and the
Three branches connect；Including：The normally opened contact of second intermediate relay K2, the normally-closed contact of the tenth intermediate relay K10, II sections of electricity
The coil of source main contactor KMM2 is sequentially connected；The connection of the output terminal and the 3rd branch of II sections of power supply main contactor KMM2 coils
Point is arranged between I sections of power supply main contactor KMM1 normally-closed contacts and the first intermediate relay K1 normally opened contacts；
The II sections of power supply automatic control loop, further includes：Among the normally-closed contact and the 9th of first intermediate relay K1
The normally opened contact of relay K9, input terminal is connected with the first intermediate relay K1 normally opened contact input terminals in the 3rd branch, defeated
Outlet is connected with the second intermediate relay K2 normally opened contact input terminals；
The II sections of busbar voltage open-phase protection circuit, including：Second source supervisory relay KX2 normally opened contacts, second
Intermediate relay K2 coils are sequentially connected；
The power transfer relay circuit, including：I sections of main contactor fault-signal hand-reset circuits, II sections of masters connect
Tentaculum fault-signal hand-reset circuit, threeth fuse 3FU, threeth air switch QM3 of the input terminal by being sequentially connected in series
Anode is connected with the anode (+KM) of direct current supply line, fourth fuse 4FU, threeth air of the output terminal by being sequentially connected in series
QM3 cathode are switched, are connected with direct current supply line cathode (- KM)；
The I sections of main contactor fault-signal hand-reset circuit, including：
First shunt circuit, including：Normally opened contact, the busbar voltage supervisory relay KX3 of I sections of power supply main contactor KMM1
Normally-closed contact, the 6th time-delay relay KT6 coils are sequentially connected；
Second shunt circuit, including：6th time-delay relay KT6 normally opened contacts, the 9th intermediate relay K9 coils are successively
Connection；9th intermediate relay K9 normally opened contacts, the first normally closed button SB1 are sequentially connected；9th intermediate relay K9 is normally opened to be touched
Point input terminal is connected with the 6th time-delay relay KT6 normally opened contact input terminals；First normally closed button SB1 output terminals and the 6th delay
Relay KT6 normally opened contacts output terminal connects；
First shunt circuit is arranged in parallel with the second shunt circuit；
The II sections of main contactor fault-signal hand-reset circuit, including：
3rd shunt circuit, including：Normally opened contact, the busbar voltage supervisory relay of II sections of power supply main contactor KMM2
KX3 normally-closed contacts, the 7th time-delay relay KT7 coils are sequentially connected；
4th shunt circuit, including：7th time-delay relay KT7 normally opened contacts, the tenth intermediate relay K10 coils are successively
Connection；Tenth intermediate relay K10 normally opened contacts, the second normally closed button SB2 are sequentially connected；Tenth intermediate relay K10 is normally opened
Contact input terminal is connected with the 7th time-delay relay KT7 normally opened contact input terminals；Second normally closed button SB2 output terminals prolong with the 7th
When the connection of relay KT7 normally opened contacts output terminals；
3rd shunt circuit is arranged in parallel with the 4th shunt circuit.
It is preferred that the first branch, further includes：The coil of first time-delay relay KT1 is arranged at the second intermediate relay
Between device K2 normally opened contacts and II sections of power supply main contactor KMM2 normally-closed contacts；First time-delay relay KT1 coil outputs with
The output terminal connection of the second branch；
The I sections of power supply automatic control loop, further includes：7th intermediate relay K7 normally opened contacts, input terminal and second
Intermediate relay K2 normally opened contacts input terminal connects, and output terminal is connected with the first intermediate relay K1 normally opened contact input terminals；
The power transfer relay circuit, further includes：I sections of main contactor fault rescue circuits and the first shunt circuit
It is arranged in parallel, including：Time-delay relay KT2 normally opened contacts, the coil of intermediate relay K8 are sequentially connected；
3rd branch, further includes：It is normal to be arranged at the first intermediate relay K1 for the coil of second time-delay relay KT2
It opens between contact and I sections of power supply main contactor KMM1 normally-closed contacts；Second time-delay relay KT2 coil outputs and the 4th branch
Output terminal connection；
The II sections of power supply automatic control loop, further includes：8th intermediate relay K8 normally opened contacts, input terminal and first
Intermediate relay K1 normally opened contacts input terminal connects, and output terminal is connected with the second intermediate relay K2 normally opened contact input terminals；
The power transfer relay circuit, further includes：II sections of main contactor fault rescue circuits and the 3rd shunt circuit
It is arranged in parallel, including：Time-delay relay KT1 normally opened contacts, the coil of intermediate relay K7 are sequentially connected.
It is preferred that the fault-signal instruction circuit, is arranged in parallel with the first shunt circuit, including：
I sections of power failures indicate circuit, including：First intermediate relay K1 normally-closed contacts, the 3rd indicator light RD3 connect successively
It connects；
II sections of power failures indicate circuit, including：Second intermediate relay K2 normally-closed contacts, the 4th indicator light RD4 are successively
Connection；
I sections of main contactor indicating fault circuits, including：8th intermediate relay K8 normally opened contacts, the 5th indicator light RD5 according to
Secondary connection；9th intermediate relay K9 normally opened contacts are arranged in parallel with the 8th intermediate relay K8 normally opened contacts；
II sections of main contactor indicating fault circuits, including：7th intermediate relay K7 normally opened contacts, the 6th indicator light RD6
It is sequentially connected；Tenth intermediate relay K10 normally opened contacts are arranged in parallel with the 7th intermediate relay K7 normally opened contacts.
It is preferred that the change-over switch CK1 be manual change-over switch, when going to left side I gears, 5. -6. contact, 9. -10.
Contact closure, the states of two sections of power supplys are I sections of power works, II sections of power backups；Go to the right II gears when 3. -4. contact,
7. -8. contact closure, the states of two sections of power supplys are I sections of power backups, II sections of power works.
It is preferred that the first normally closed button SB1, the second normally closed button SB2 are Manual automatic resetting position button.
Advantageous effect of the present invention includes：
Compared with prior art, scheme provided by the invention sets busbar voltage below the main contactor of two sections of power supplys
Supervisory relay KX3 can become higher in busbar voltage, is lower or be acted when there is phase shortage, and then can be accurately judged to two sections
The main contactor of power supply breaks down；Power supply switching circuit and power transfer relay circuit are improved, wherein one section of power supply
It breaks down, it is necessary to when switching to another section of power supply, adds switching circuit, make switching relatively reliable, reduce risk, increase
Control stability；Fault-signal is enriched simultaneously, the operating personnel that is more convenient for is checked and operated.
Description of the drawings
In the accompanying drawings：
Fig. 1 is the overall structure diagram of the present invention；
Fig. 2 is power monitor circuit and the structure diagram of the structure of power supply switching circuit in the present invention；
Fig. 3 is the structure diagram that power transfer relay circuit indicates circuit with fault-signal in the present invention.
Reference sign：1：Power monitor circuit；2：Power supply switching circuit；3：Power transfer relay circuit；4 failures
Signal designation circuit；QF1：First air switch；The second air switches of QF2；1FU：First fuse；2FU second fuses；
3FU：3rd fuse；4FU：4th fuse；QM3：3rd air switch；+ KM ,-KM：Direct current supply line positive electrode and negative electrode；
KX1：First power monitoring relay；KX2：Second source supervisory relay；KX3：Busbar voltage supervisory relay；KMM1：I sections
Power supply main contactor；KMM2：II sections of power supply main contactors；K1：First intermediate relay；K2：Second intermediate relay；K7：The
Seven intermediate relays；K8：8th intermediate relay；K9：9th intermediate relay；K10：Tenth intermediate relay；KT1：First
Time-delay relay；KT2：Second time-delay relay；KT6：6th time-delay relay；KT7：7th time-delay relay；SB1：First
Normally closed button；SB2：Second normally closed button；RD3：3rd indicator light；RD4：4th indicator light；RD5：5th indicator light；RD6：The
Six indicator lights；CK1：Change-over switch.
Specific embodiment
Below in conjunction with the accompanying drawings, with specific embodiment, the present invention will be described in detail.
Refering to shown in Fig. 1 and Fig. 2, forced oil-circulated air-cooled transformer cooling control system provided in this embodiment, including：Electricity
Source monitoring circuit 1, input terminal are connected respectively with I sections of power supplys and II sections of power supplys, and output terminal is connected with cooler；Power supply switching circuit
2, it is connected with power monitor circuit 1, by the way that power monitor circuit 1 is controlled to control the switching of I sections of power supplys and II sections of power supplys；Power supply is cut
Relay circuit 3 is changed, is connected respectively with power monitor circuit 1 and power supply switching circuit 2；Fault-signal indicate circuit 4, respectively with
Power transfer relay circuit 3 and power supply switching circuit 2 connect；Wherein, power monitor circuit 1, including：I sections of power cord L1,
L2, L3 bridge the first air switch QF1, the coil of the first power monitoring relay KX1 and the I sections of main contacts of power supply successively thereon
The normally opened contact of device KMM1；II sections of power cords L4, L5, L6 bridge the second air switch QF2, second source monitoring successively thereon
The normally opened contact of coil and II section power supply main contactor KMM2 of relay KX2；The coil of busbar voltage supervisory relay KX3,
Input terminal is exported with I sections of power supply main contactor KMM1 normally opened contacts output terminals and II sections of power supply main contactor KMM2 normally opened contacts
End connection, output terminal are connected with cooler.The setting of first power monitoring relay KX1, second source supervisory relay KX2's
It sets, incoming call side current quality can be monitored；Busbar voltage supervisory relay KX3 is arranged at below two sections of power supply main contactors,
It can monitor after two sections of power supply main contactors close, lower side current quality, in the control hair of I, II sections of power supply main contactors
Raw failure either contactor failure itself when KX3 by the phase shortage of monitoring voltage, voltage is high or voltage is low that failure is carried out
Judge.
Refering to shown in Fig. 2 and Fig. 3, it is preferred that power supply switching circuit 2, including：
I sections of power supply automatic control loops, I sections of busbar voltage open-phase protection circuits, input terminal pass through first fuse 1FU
It is connected with the firewire L1 of I sections of power supplys, output terminal is connected with zero curve N；For controlling the operation of I sections of power supplys and I sections of power supplys therefore
During barrier, switch to II sections of power supplys and work.
II sections of power supply automatic control loops, II sections of busbar voltage open-phase protection circuits, input terminal pass through second fuse
2FU is connected with the firewire L4 of II sections of power supplys, and output terminal is connected with zero curve N；For controlling the operation of II sections of power supplys and II sections
During power failure, switch to I sections of power supplys and work.
I sections of power supply automatic control loops, including：
The first branch, input terminal by change-over switch CK1 3. -4. contact be connected with the output terminal of first fuse 1FU,
Output terminal is connected with zero curve N；Including：The normally opened contact of second intermediate relay K2, II sections of power supply main contactor KMM2 it is normally closed
Contact is sequentially connected；
The second branch, input terminal by change-over switch CK1 5. -6. contact be connected with the output terminal of first fuse 1FU,
Output terminal is connected with the second branch；Including：The normally opened contact of first intermediate relay K1, the normally closed of the 9th intermediate relay K9 are touched
The coil of point, I sections of power supply main contactor KMM1 is sequentially connected；The output terminal of I sections of power supply main contactor KMM1 coils and first
The tie point on road is arranged between II sections of power supply main contactor KMM2 normally-closed contacts and the second intermediate relay K2 normally opened contacts；
I sections of power supply automatic control loops, further include：The normally-closed contact and the tenth intermediate relay of second intermediate relay K2
The normally opened contact of K10, input terminal are connected with the second intermediate relay K2 normally opened contact input terminals in the first branch, and output terminal is equal
It is connected with the first intermediate relay K1 normally opened contact input terminals；
I sections of busbar voltage open-phase protection circuits, including：First power monitoring relay KX1 normally opened contacts, among first after
Electric appliance K1 coils are sequentially connected；
II sections of power supply automatic control loops, including：
3rd branch, input terminal by change-over switch CK1 9. -10. contact be connected with the output terminal of second fuse 2FU,
Output terminal is connected with zero curve N；Including：The normally opened contact of first intermediate relay K1, I sections of the normally closed of power supply main contactor KMM1 are touched
Point is sequentially connected；The normally opened contact of first intermediate relay K1, the normally-closed contact of I sections of power supply main contactor KMM1 are sequentially connected；
4th branch, input terminal by change-over switch CK1 7. -8. contact be connected with the output terminal of the second molten device 2FU, output terminal and the
Three branches connect；Including：The normally opened contact of second intermediate relay K2, the normally-closed contact of the tenth intermediate relay K10, II sections of electricity
The coil of source main contactor KMM2 is sequentially connected；The connection of the output terminal and the 3rd branch of II sections of power supply main contactor KMM2 coils
Point is arranged between I sections of power supply main contactor KMM1 normally-closed contacts and the first intermediate relay K1 normally opened contacts；
II sections of power supply automatic control loops, further include：The normally-closed contact and the 9th intermediate relay of first intermediate relay K1
The normally opened contact of device K9, input terminal are connected with the first intermediate relay K1 normally opened contact input terminals in the 3rd branch, output terminal
It is connected with the second intermediate relay K2 normally opened contact input terminals；
II sections of busbar voltage open-phase protection circuits, including：Second source supervisory relay KX2 normally opened contacts, among second
Relay K2 coils are sequentially connected；
Power transfer relay circuit 3, including：I sections of main contactor fault-signal hand-reset circuits, II sections of main contactors
Fault-signal hand-reset circuit, input terminal by the 3rd fuse 3FU, the 3rd air switch QM3 anodes that are sequentially connected in series,
It is connected with the anode (+KM) of direct current supply line, fourth fuse 4FU, threeth air switch of the output terminal by being sequentially connected in series
QM3 cathode are connected with direct current supply line cathode (- KM)；
I sections of main contactor fault-signal hand-reset circuits, including：
First shunt circuit, including：Normally opened contact, the busbar voltage supervisory relay KX3 of I sections of power supply main contactor KMM1
Normally-closed contact, the 6th time-delay relay KT6 coils are sequentially connected；
Second shunt circuit, including：6th time-delay relay KT6 normally opened contacts, the 9th intermediate relay K9 coils are successively
Connection；9th intermediate relay K9 normally opened contacts, the first normally closed button SB1 are sequentially connected；9th intermediate relay K9 is normally opened to be touched
Point input terminal is connected with the 6th time-delay relay KT6 normally opened contact input terminals；First normally closed button SB1 output terminals and the 6th delay
Relay KT6 normally opened contacts output terminal connects；Second shunt circuit is self-holding circuit；Manually disconnect the first normally closed button
SB1 can disconnect self-sustaining；
First shunt circuit is arranged in parallel with the second shunt circuit；
II sections of main contactor fault-signal hand-reset circuits, including：
3rd shunt circuit, including：Normally opened contact, the busbar voltage supervisory relay of II sections of power supply main contactor KMM2
KX3 normally-closed contacts, the 7th time-delay relay KT7 coils are sequentially connected；
4th shunt circuit, including：7th time-delay relay KT7 normally opened contacts, the tenth intermediate relay K10 coils are successively
Connection；Tenth intermediate relay K10 normally opened contacts, the second normally closed button SB2 are sequentially connected；Tenth intermediate relay K10 is normally opened
Contact input terminal is connected with the 7th time-delay relay KT7 normally opened contact input terminals；Second normally closed button SB2 output terminals prolong with the 7th
When the connection of relay KT7 normally opened contacts output terminals；4th shunt circuit is self-holding circuit；Manually disconnection second is normally closed presses
Button SB2 can disconnect self-sustaining；
3rd shunt circuit is arranged in parallel with the 4th shunt circuit.
Refering to shown in Fig. 2 and Fig. 3, it is preferred that the first branch, further includes：The coil of first time-delay relay KT1 is set
Between the second intermediate relay K2 normally opened contacts and II sections of power supply main contactor KMM2 normally-closed contacts；First time-delay relay
KT1 coil outputs and the output terminal of the second branch connect；
I sections of power supply automatic control loops, further include：7th intermediate relay K7 normally opened contacts, among input terminal and second
Relay K2 normally opened contacts input terminal connects, and output terminal is connected with the first intermediate relay K1 normally opened contact input terminals；
Power transfer relay circuit 3, further includes：It is I sections of main contactor fault rescue circuits, in parallel with the first shunt circuit
It sets, including：Time-delay relay KT2 normally opened contacts, the coil of intermediate relay K8 are sequentially connected；
3rd branch, further includes：It is normally opened tactile to be arranged at the first intermediate relay K1 for the coil of second time-delay relay KT2
Between point and I sections of power supply main contactor KMM1 normally-closed contacts；Second time-delay relay KT2 coil outputs are defeated with the 4th branch
Outlet connects；
II sections of power supply automatic control loops, further include：8th intermediate relay K8 normally opened contacts, among input terminal and first
Relay K1 normally opened contacts input terminal connects, and output terminal is connected with the second intermediate relay K2 normally opened contact input terminals；
Power transfer relay circuit 3, further includes：II sections of main contactor fault rescue circuits and the 3rd shunt circuit are simultaneously
Connection is set, including：Time-delay relay KT1 normally opened contacts, the coil of intermediate relay K7 are sequentially connected.
As shown in fig.3, it is preferred that fault-signal indicate circuit 4, be arranged in parallel with the first shunt circuit, including：
I sections of power failures indicate circuit, including：First intermediate relay K1 normally-closed contacts, the 3rd indicator light RD3 connect successively
It connects；
II sections of power failures indicate circuit, including：Second intermediate relay K2 normally-closed contacts, the 4th indicator light RD4 are successively
Connection；
I sections of main contactor indicating fault circuits, including：8th intermediate relay K8 normally opened contacts, the 5th indicator light RD5 according to
Secondary connection；9th intermediate relay K9 normally opened contacts are arranged in parallel with the 8th intermediate relay K8 normally opened contacts；
II sections of main contactor indicating fault circuits, including：7th intermediate relay K7 normally opened contacts, the 6th indicator light RD6
It is sequentially connected；Tenth intermediate relay K10 normally opened contacts are arranged in parallel with the 7th intermediate relay K7 normally opened contacts.
As shown in fig.2, it is preferred that change-over switch CK1 is manual change-over switch, when going to left side I gears, 5. -6. touch
Point, 9. -10. contact closure, the states of two sections of power supplys are I sections of power works, II sections of power backups；Go to the right II gears when 3.-
4. the contact closure of contact, 7. -8., the states of two sections of power supplys are I sections of power backups, II sections of power works.
As shown in fig.3, it is preferred that the first normally closed button SB1, the second normally closed button SB2 are Manual automatic resetting position button.
With reference to Fig. 2 and Fig. 3, illustrate action and the principle of the embodiment of the present invention：
First, the first air switch QF1, the second air switch QF2, I sections of power supplys of input, II sections of power supplys, the first electricity are closed
Source supervisory relay KX1 coils are charged, and second source supervisory relay KX2 coils are charged, make the KX1 in power supply switching circuit normal
Contact, KX2 normally opened contacts closure are opened, so that K1 coils, the charged action of K2 coils, cause K1 normally opened contacts, K2 are normally opened to touch
Point is closed, and K1 normally-closed contacts, K2 normally-closed contacts are opened, and the actuation for KMM1 coils or KMM2 coils is ready；
Change-over switch CK1 is converted to the I shelves on the left side, I sections of power works, II sections of power backups, 5. -6. contact, 9. -10.
Contact closure, KMM1 coils obtain electric, and KMM1 normally opened contacts in power monitor circuit are closed, and II section power supplys are cooler power supply；
When I sections of power supply main contactor KMM1 stick together failure, voltage phase shortage or voltage is caused to be raised and lowered,
KX3 is able to detect that the transformation of voltage, and then dead electricity, passes through I sections of main contactor fault-signal hand-reset circuits, start-up study
The coil of relay KT6, and then start K9 coils, the K9 normally opened contacts in II sections of power supply automatic control loops are closed, are made
KMM2 coils obtain electric, and then KMM2 normally opened contacts are closed, and II section power supplys input is powered for cooler, is completed automatic power and is switched；
Meanwhile KT2 is set, when KMM1 breaks down, KT2 can be started, and then make K8 coils by I sections of main contactor fault rescue circuits
Must be electric, then it is closed the K8 normally opened contacts in II sections of power supply automatic control loops, K8 normally opened contacts and K9 normally opened contacts are formed
Two-way power supply switches channel, reduces risk of handover, makes switching relatively reliable；
During KMM1 failures, the second shunt circuit in I sections of main contactor fault-signal hand-reset circuits forms self-sustaining
Circuit, if by checking, KMM1 not failures, simply power supply switches caused by spread of voltage, then can manually open the
One normally closed button SB1, disconnects self-sustaining, at this point, K9 dead electricity, in II sections of power supply automatic control loops, K9 normally opened contacts are opened,
KMM2 coil losing electricities；In I sections of power supply automatic control loops, K9 normally-closed contacts are closed, and KMM1 coils obtain electric；I sections of power supplys are thrown again
Enter power supply, II sections of power supplys enter stand-by state；
It is indicated on fault-signal, by I sections of voltage open-phase protection circuits, if KX1 coil losing electricities, KX1 are normally opened
Contact disconnects, and causes K1 coil losing electricities, and then K1 normally-closed contacts in I sections of power failure instruction circuits is caused to be closed, the 3rd instruction
Lamp RD3 is opened；
By II sections of voltage open-phase protection circuits, if KX2 coil losing electricities, KX2 normally opened contacts disconnect, and cause K2 lines
Dead electricity is enclosed, and then K2 normally-closed contacts in II sections of power failure instruction circuits is caused to be closed, the 4th indicator light RD4 is opened；
By II sections of power supply automatic control loops, if K8 normally opened contacts are closed or K9 normally opened contacts are closed, show
II sections of power supplys enter operating status, show that I sections of main contactors break down, therefore cause I sections of main contactor indicating fault circuits
In RD5 indicator lights open；
By I sections of power supply automatic control loops, if K7 normally opened contacts are closed or K10 normally opened contacts are closed, show
I sections of power supplys enter operating status, show that II sections of main contactors break down, therefore cause II sections of main contactor indicating fault circuits
In RD6 indicator lights open.
In conclusion compared with prior art, scheme provided in an embodiment of the present invention, under the main contactor of two sections of power supplys
Side sets busbar voltage supervisory relay KX3, can become higher in busbar voltage, is lower or be acted when there is phase shortage, and then can
The main contactor for being accurately judged to two sections of power supplys breaks down；Power supply switching circuit and power transfer relay circuit are improved,
One section of power supply breaks down, it is necessary to when switching to another section of power supply wherein, adds switching circuit, makes switching relatively reliable,
Risk is reduced, increases control stability；Fault-signal is enriched simultaneously, the operating personnel that is more convenient for is checked and operated..
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
God and scope.In this way, if these modifications and changes of the present invention belongs to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising including these modification and variations.
Claims (6)
1. a kind of forced oil-circulated air-cooled transformer cooling control system, which is characterized in that including：The system comprises：Power supply is supervised
Depending on circuit, input terminal is connected respectively with I sections of power supplys and II sections of power supplys, and output terminal is connected with cooler；Power supply switching circuit, with electricity
Source monitoring circuit connection, by the way that power monitor circuit is controlled to control the switching of I sections of power supplys and II sections of power supplys；Power transfer relay
Circuit is connected respectively with power monitor circuit and power supply switching circuit；Fault-signal indicates circuit, switches relay with power supply respectively
Device circuit and the connection of power supply switching circuit；Wherein, power monitor circuit, including：I sections of power cords L1, L2, L3, thereon successively across
Connect the normally opened contact of the first air switch QF1, the coil of the first power monitoring relay KX1 and I sections of power supply main contactor KMM1；
II sections of power cords L4, L5, L6, bridge successively thereon the second air switch QF2, second source supervisory relay KX2 coil and
The normally opened contact of II sections of power supply main contactor KMM2；The coil of busbar voltage supervisory relay KX3, input terminal and I sections of power supply masters
Contactor KMM1 normally opened contacts output terminal and the connection of II sections of power supply main contactor KMM2 normally opened contacts output terminals, output terminal with it is cold
But device connects.
2. forced oil-circulated air-cooled transformer cooling control system as described in claim 1, which is characterized in that including：
The power supply switching circuit, including：
I sections of power supply automatic control loops, I sections of busbar voltage open-phase protection circuits, input terminal pass through first fuse 1FU and I
The firewire L1 connections of section power supply, output terminal are connected with zero curve N；
II sections of power supply automatic control loops, II sections of busbar voltage open-phase protection circuits, input terminal by second fuse 2FU with
The firewire L4 connections of II sections of power supplys, output terminal are connected with zero curve N；
The I sections of power supply automatic control loop, including：
The first branch, input terminal by change-over switch CK1 3. -4. contact be connected with the output terminal of first fuse 1FU, export
End is connected with zero curve N；Including：The normally-closed contact of the normally opened contact of second intermediate relay K2, II sections of power supply main contactor KMM2
It is sequentially connected；
The second branch, input terminal by change-over switch CK1 5. -6. contact be connected with the output terminal of first fuse 1FU, export
End is connected with the second branch；Including：Normally opened contact, normally-closed contact, the I of the 9th intermediate relay K9 of first intermediate relay K1
The coil of section power supply main contactor KMM1 is sequentially connected；The output terminals of I sections of power supply main contactor KMM1 coils and the first branch
Tie point is arranged between II sections of power supply main contactor KMM2 normally-closed contacts and the second intermediate relay K2 normally opened contacts；
The I sections of power supply automatic control loop, further includes：The normally-closed contact and the tenth intermediate relay of second intermediate relay K2
The normally opened contact of K10, input terminal are connected with the second intermediate relay K2 normally opened contact input terminals in the first branch, and output terminal is equal
It is connected with the first intermediate relay K1 normally opened contact input terminals；
The I sections of busbar voltage open-phase protection circuit, including：First power monitoring relay KX1 normally opened contacts, among first after
Electric appliance K1 coils are sequentially connected；
The II sections of power supply automatic control loop, including：
3rd branch, input terminal by change-over switch CK1 9. -10. contact be connected with the output terminal of second fuse 2FU, export
End is connected with zero curve N；Including：The normally opened contact of first intermediate relay K1, I sections of power supply main contactor KMM1 normally-closed contact according to
Secondary connection；The normally opened contact of first intermediate relay K1, the normally-closed contact of I sections of power supply main contactor KMM1 are sequentially connected；4th
Branch, input terminal by change-over switch CK1 7. -8. contact be connected with the output terminal of the second molten device 2FU, output terminal and the 3rd
Road connects；Including：The normally opened contact of second intermediate relay K2, the normally-closed contact of the tenth intermediate relay K10, II sections of power supply masters
The coil of contactor KMM2 is sequentially connected；The output terminal of II sections of power supply main contactor KMM2 coils and the tie point of the 3rd branch,
It is arranged between I sections of power supply main contactor KMM1 normally-closed contacts and the first intermediate relay K1 normally opened contacts；
The II sections of power supply automatic control loop, further includes：The normally-closed contact and the 9th intermediate relay of first intermediate relay K1
The normally opened contact of device K9, input terminal are connected with the first intermediate relay K1 normally opened contact input terminals in the 3rd branch, output terminal
It is connected with the second intermediate relay K2 normally opened contact input terminals；
The II sections of busbar voltage open-phase protection circuit, including：Second source supervisory relay KX2 normally opened contacts, among second
Relay K2 coils are sequentially connected；
The power transfer relay circuit, including：I sections of main contactor fault-signal hand-reset circuits, II sections of main contactors
Fault-signal hand-reset circuit, input terminal by the 3rd fuse 3FU, the 3rd air switch QM3 anodes that are sequentially connected in series,
It is connected with the anode (+KM) of direct current supply line, fourth fuse 4FU, threeth air switch of the output terminal by being sequentially connected in series
QM3 cathode are connected with direct current supply line cathode (- KM)；
The I sections of main contactor fault-signal hand-reset circuit, including：
First shunt circuit, including：Normally opened contact, the busbar voltage supervisory relay KX3 of I sections of power supply main contactor KMM1 is normally closed
Contact, the 6th time-delay relay KT6 coils are sequentially connected；
Second shunt circuit, including：6th time-delay relay KT6 normally opened contacts, the 9th intermediate relay K9 coils are sequentially connected；
9th intermediate relay K9 normally opened contacts, the first normally closed button SB1 are sequentially connected；9th intermediate relay K9 normally opened contacts input
End is connected with the 6th time-delay relay KT6 normally opened contact input terminals；First normally closed button SB1 output terminals and the 6th time-delay relay
KT6 normally opened contacts output terminal connects；
First shunt circuit is arranged in parallel with the second shunt circuit；
The II sections of main contactor fault-signal hand-reset circuit, including：
3rd shunt circuit, including：Normally opened contact, the busbar voltage supervisory relay KX3 of II sections of power supply main contactor KMM2 is normal
Closed contact, the 7th time-delay relay KT7 coils are sequentially connected；
4th shunt circuit, including：7th time-delay relay KT7 normally opened contacts, the tenth intermediate relay K10 coils connect successively
It connects；Tenth intermediate relay K10 normally opened contacts, the second normally closed button SB2 are sequentially connected；Tenth intermediate relay K10 is normally opened to be touched
Point input terminal is connected with the 7th time-delay relay KT7 normally opened contact input terminals；Second normally closed button SB2 output terminals and the 7th delay
Relay KT7 normally opened contacts output terminal connects；
3rd shunt circuit is arranged in parallel with the 4th shunt circuit.
3. forced oil-circulated air-cooled transformer cooling control system as claimed in claim 2, which is characterized in that including：
The first branch, further includes：It is normally opened tactile to be arranged at the second intermediate relay K2 for the coil of first time-delay relay KT1
Between point and II sections of power supply main contactor KMM2 normally-closed contacts；First time-delay relay KT1 coil outputs and the second branch
Output terminal connects；
The I sections of power supply automatic control loop, further includes：7th intermediate relay K7 normally opened contacts, among input terminal and second
Relay K2 normally opened contacts input terminal connects, and output terminal is connected with the first intermediate relay K1 normally opened contact input terminals；
The power transfer relay circuit, further includes：It is I sections of main contactor fault rescue circuits, in parallel with the first shunt circuit
It sets, including：Time-delay relay KT2 normally opened contacts, the coil of intermediate relay K8 are sequentially connected；
3rd branch, further includes：It is normally opened tactile to be arranged at the first intermediate relay K1 for the coil of second time-delay relay KT2
Between point and I sections of power supply main contactor KMM1 normally-closed contacts；Second time-delay relay KT2 coil outputs are defeated with the 4th branch
Outlet connects；
The II sections of power supply automatic control loop, further includes：8th intermediate relay K8 normally opened contacts, among input terminal and first
Relay K1 normally opened contacts input terminal connects, and output terminal is connected with the second intermediate relay K2 normally opened contact input terminals；
The power transfer relay circuit, further includes：It is II sections of main contactor fault rescue circuits, in parallel with the 3rd shunt circuit
It sets, including：Time-delay relay KT1 normally opened contacts, the coil of intermediate relay K7 are sequentially connected.
4. forced oil-circulated air-cooled transformer cooling control system as claimed in claim 3, which is characterized in that including：The event
Hinder signal designation circuit, be arranged in parallel with the first shunt circuit, including：
I sections of power failures indicate circuit, including：First intermediate relay K1 normally-closed contacts, the 3rd indicator light RD3 are sequentially connected；
II sections of power failures indicate circuit, including：Second intermediate relay K2 normally-closed contacts, the 4th indicator light RD4 are sequentially connected；
I sections of main contactor indicating fault circuits, including：8th intermediate relay K8 normally opened contacts, the 5th indicator light RD5 connect successively
It connects；9th intermediate relay K9 normally opened contacts are arranged in parallel with the 8th intermediate relay K8 normally opened contacts；
II sections of main contactor indicating fault circuits, including：7th intermediate relay K7 normally opened contacts, the 6th indicator light RD6 are successively
Connection；Tenth intermediate relay K10 normally opened contacts are arranged in parallel with the 7th intermediate relay K7 normally opened contacts.
5. forced oil-circulated air-cooled transformer cooling control system as claimed in claim 2, which is characterized in that including：Described turn
It is manual change-over switch to change switch CK1, when going to left side I gears, 5. -6. contact, 9. -10. contact closure；Go to II grades of the right
3. -4. contact, 7. -8. contact closure during position.
6. forced oil-circulated air-cooled transformer cooling control system as claimed in claim 2, which is characterized in that including：Described
One normally closed button SB1, the second normally closed button SB2 are Manual automatic resetting position button.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810000288.0A CN108063491B (en) | 2018-01-01 | 2018-01-01 | Cooling control system of forced oil circulation air-cooled transformer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810000288.0A CN108063491B (en) | 2018-01-01 | 2018-01-01 | Cooling control system of forced oil circulation air-cooled transformer |
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| CN108063491B CN108063491B (en) | 2024-01-23 |
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| CN110161955A (en) * | 2019-05-31 | 2019-08-23 | 广东电网有限责任公司 | A kind of transformer Cooling case PLC failure emergency processing method and normally opened relay |
| CN110259675A (en) * | 2019-06-21 | 2019-09-20 | 泰豪科技股份有限公司 | Water circulating pump band cooling blower frequency conversion one drag two control circuit and system |
| CN111711193A (en) * | 2020-07-17 | 2020-09-25 | 中车大连机车车辆有限公司 | Power supply control method and device for multi-connection electric locomotive |
| CN112271730A (en) * | 2020-10-28 | 2021-01-26 | 浙江佳乐科仪股份有限公司 | Electrical control box for switching main power supply and auxiliary power supply |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110161955A (en) * | 2019-05-31 | 2019-08-23 | 广东电网有限责任公司 | A kind of transformer Cooling case PLC failure emergency processing method and normally opened relay |
| CN110161955B (en) * | 2019-05-31 | 2024-02-02 | 广东电网有限责任公司 | Transformer cooling box PLC fault emergency processing method and normally open relay |
| CN110259675A (en) * | 2019-06-21 | 2019-09-20 | 泰豪科技股份有限公司 | Water circulating pump band cooling blower frequency conversion one drag two control circuit and system |
| CN110259675B (en) * | 2019-06-21 | 2024-06-11 | 泰豪科技股份有限公司 | Variable-frequency one-to-two control circuit and system for circulating water pump with cooling fan |
| CN111711193A (en) * | 2020-07-17 | 2020-09-25 | 中车大连机车车辆有限公司 | Power supply control method and device for multi-connection electric locomotive |
| CN112271730A (en) * | 2020-10-28 | 2021-01-26 | 浙江佳乐科仪股份有限公司 | Electrical control box for switching main power supply and auxiliary power supply |
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