CN203350670U - Transformer cooling system comprehensive and intelligent controller - Google Patents
Transformer cooling system comprehensive and intelligent controller Download PDFInfo
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- CN203350670U CN203350670U CN 201320465057 CN201320465057U CN203350670U CN 203350670 U CN203350670 U CN 203350670U CN 201320465057 CN201320465057 CN 201320465057 CN 201320465057 U CN201320465057 U CN 201320465057U CN 203350670 U CN203350670 U CN 203350670U
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- 238000001816 cooling Methods 0.000 title claims abstract description 49
- 238000001514 detection method Methods 0.000 claims abstract description 22
- 230000001681 protective effect Effects 0.000 claims description 11
- 230000010259 detection of temperature stimulus Effects 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract 1
- 230000002457 bidirectional effect Effects 0.000 description 3
- 238000002955 isolation Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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Abstract
A transformer cooling system comprehensive and intelligent controller relates to a power transformer cooling system comprehensive and intelligent control technology, and is used for solving the problems that a conventional large-scale power transformer cooling system needs to be controlled artificially, is low in automation degree and lacks necessary protection. The transformer cooling system comprehensive and intelligent controller of the utility model determines the number of the fan set needing to be started according to an oil temperature measured by a temperature detection circuit 1, the higher the temperature is, the larger the number of the started fan set is. When the two consecutive detected oil temperatures of a transformer are equal, a one-chip microcomputer circuit controls the fans to work by turns according to a fan control circuit; and when the current of an oil pump or the fan set is higher than a preset value, the power supply of the oil pump or the fan set is cut off, at the same time, a fault alarm circuit sends out the alarm information. The transformer cooling system comprehensive and intelligent controller realizes the automation control during the whole work process, has a motor protection function, guarantees that the fans are not burnt out, and is suitable for the cooling control of the large-scale power transformer.
Description
Technical field
The utility model relates to power transformer cooling system comprehensive intelligent control technology, belongs to the intelligent grid field.
Background technology
In electric system, power transformer is one of important electrical equipment.Large-scale power transformer oil overheating problem is the major issue that operation and manufacturing sector all extremely paid close attention to and needed solution.For guaranteeing the continuous safe power supply of transformer, the maximization in life-span, transformer must guarantee to move in certain temperature range.The cooling system control apparatus of transformer, mostly adopt traditional Control pattern at present, drives the coil of A.C. contactor by the switching of operations staff's manual control mechanical contact, and connect the work loop of refrigeratory.This mode has a lot of shortcomings, as automaticity is low, lacks necessary protection, and blower fan the group start simultaneously, and electric current is excessive etc.Along with unattended operation transformer station is universal, because scene does not have the operations staff, can not throw in time and stop refrigeratory, make the temperature difference amplitude of transformer when peak and low ebb load large, accelerate Transformer Insulation Aging, cause the leakage of oil of seal member.
The utility model content
The purpose of this utility model is to need in order to solve current large-scale power transformer cooling system the problem that manual control, automaticity are low, lack necessary protection, and a kind of transformer cooling system integrated intelligent controller is provided.
Transformer cooling system integrated intelligent controller described in the utility model comprises temperature sensing circuit 1, current detection circuit 2, the first A/D converter 3, the second A/D converter 4, single chip circuit 6, draught fan control circuit 10 and motor protective circuit 13, described temperature sensing circuit 1 is for detection of temperature of oil in transformer, the temperature signal output terminal of described temperature sensing circuit 1 connects the signal input part of the first A/D converter 3, the signal output part of described the first A/D converter 3 connects the temperature signal input end of single chip circuit 6, current detection circuit 2 is for detection of the input current of the blower fan in transformer cooling system or oil-immersed pump, the current signal output end of described current detection circuit 2 connects the signal input part of the second A/D converter 4, the signal output part of the second A/D converter 4 connects the current signal input end of single chip circuit 6, the control signal input end of the air-blower control signal output part connecting fan control circuit 10 of described single chip circuit 6, the protection control signal output terminal of single chip circuit 6 connects the control signal input end of motor protective circuit 13.
Transformer cooling system integrated intelligent controller described in the utility model also comprises the first tri-state gate circuit 5, the second tri-state gate circuit 7 and expansion port circuit 8, the signal output part of the first A/D converter 3 connects the temperature signal input end of single chip circuit 6 by the first tri-state gate circuit 5, the signal output part of the second A/D converter 4 connects the current signal input end of single chip circuit 6 by the first tri-state gate circuit 5, the data bus of single chip circuit 6 is connected with the data bus of expansion port circuit 8 by the second tri-state gate circuit 7, the air-blower control signal output part of single chip circuit 6 is by the control signal input end of the second tri-state gate circuit 7 and expansion port circuit 8 connecting fan control circuits 10.
Transformer cooling system integrated intelligent controller described in the utility model also comprises digital display circuit 9, and the display control signal input end of described digital display circuit 9 connects the display control signal output terminal of expansion port circuit 8.
Transformer cooling system integrated intelligent controller described in the utility model also comprises working indicating 11, and the indication control signal input end of described working indicating 11 connects the indication control signal output terminal of expansion port circuit 8.
Transformer cooling system integrated intelligent controller described in the utility model also comprises failure alarm circuit 12, and the control signal input end of described failure alarm circuit 12 connects the alarm control signal output terminal of single chip circuit 6.
The temperature sensing circuit 1 of transformer cooling system integrated intelligent controller described in the utility model adopts the integrated two ends of AD590 type monolithic temperature-sensitive current source to realize.
The single chip circuit 6 of transformer cooling system integrated intelligent controller described in the utility model adopts AT89C51 type chip microcontroller.
The current detection circuit 2 of transformer cooling system integrated intelligent controller described in the utility model adopts a straight-through current transformer to realize.
The draught fan control circuit 10 of transformer cooling system integrated intelligent controller described in the utility model adopts the SSR solid-state relay to realize.
Transformer cooling system integrated intelligent controller described in the utility model detects oil temperature by temperature sensing circuit 1; detect the blower fan electric current by current detection circuit 2; 6 pairs of temperature signals of single chip circuit and current signal are judged; and then by the duty of draught fan control circuit 10 definite blower fans; while by motor protective circuit 13, guaranteeing that electric current surpasses preset value, motor can not be burned; realize the automatic control of transformer cooling system, and there is the electric motor protecting function.
The accompanying drawing explanation
The theory diagram that Fig. 1 is transformer cooling system integrated intelligent controller described in the utility model;
The schematic diagram that Fig. 2 is draught fan control circuit 10;
Embodiment
Embodiment one: present embodiment is described in conjunction with Fig. 1, the described transformer cooling system integrated intelligent controller of present embodiment comprises temperature sensing circuit 1, current detection circuit 2, the first A/D converter 3, the second A/D converter 4, single chip circuit 6, draught fan control circuit 10 and motor protective circuit 13, described temperature sensing circuit 1 is for detection of temperature of oil in transformer, the temperature signal output terminal of described temperature sensing circuit 1 connects the signal input part of the first A/D converter 3, the signal output part of described the first A/D converter 3 connects the temperature signal input end of single chip circuit 6, current detection circuit 2 is for detection of the input current of the blower fan in transformer cooling system or oil-immersed pump, the current signal output end of described current detection circuit 2 connects the signal input part of the second A/D converter 4, the signal output part of the second A/D converter 4 connects the current signal input end of single chip circuit 6, the control signal input end of the air-blower control signal output part connecting fan control circuit 10 of described single chip circuit 6, the protection control signal output terminal of single chip circuit 6 connects the control signal input end of motor protective circuit 13.
The function of motor protective circuit 13 is to guarantee that motor is not burnt.In actual applications, the main cause that causes motor burning is following two classes: the motor overload that (1) a variety of causes causes, and electric current is excessive; (2) current imbalance that phase current imbalance or phase shortage (comprising the phase shortage that contacts of contactor scaling loss, broken string cause) cause.The described transformer cooling system integrated intelligent controller of present embodiment has phase shortage, overload, phase current unbalance protection, inverse time lag overload protection selection of time, the functions such as overload current settings.The electric current detected when current detection circuit 2 is during higher than preset value, and single chip circuit 6 sends the electric motor protecting signals to motor protective circuit 13, and motor protective circuit 13 disconnects electric motor loops, guarantees that motor is not burnt.
The described transformer cooling system integrated intelligent controller of present embodiment detects oil temperature by temperature sensing circuit 1; detect the blower fan electric current by current detection circuit 2; 6 pairs of temperature signals of single chip circuit and current signal are judged; and then by the duty of draught fan control circuit 10 definite blower fans; while by motor protective circuit 13, guaranteeing that electric current surpasses preset value, motor can not be burned; realize the automatic control of transformer cooling system, and there is the electric motor protecting function.
Embodiment two: present embodiment is described in conjunction with Fig. 1, the difference of present embodiment and the described transformer cooling system integrated intelligent controller of embodiment one is: it also comprises the first tri-state gate circuit 5, the second tri-state gate circuit 7 and expansion port circuit 8, the signal output part of the first A/D converter 3 connects the temperature signal input end of single chip circuit 6 by the first tri-state gate circuit 5, the signal output part of the second A/D converter 4 connects the current signal input end of single chip circuit 6 by the first tri-state gate circuit 5, the data bus of single chip circuit 6 is connected with the data bus of expansion port circuit 8 by the second tri-state gate circuit 7, the air-blower control signal output part of single chip circuit 6 is by the control signal input end of the second tri-state gate circuit 7 and expansion port circuit 8 connecting fan control circuits 10.
Less when the interface of single chip circuit 6, in the time of can not meeting increased external circuit, can increase respectively the circuit structure for Extended Capabilities Port quantity at signal input side and the signal outgoing side of single chip circuit 6.Expansion port circuit 8 in present embodiment adopts 8255 type expansion mouthful chips to realize.
Embodiment three: present embodiment is described in conjunction with Fig. 1, the difference of present embodiment and the described transformer cooling system integrated intelligent controller of embodiment two is: it also comprises digital display circuit 9, and the display control signal input end of described digital display circuit 9 connects the display control signal output terminal of expansion port circuit 8.
Embodiment four: present embodiment is described in conjunction with Fig. 1, the difference of present embodiment and the described transformer cooling system integrated intelligent controller of embodiment two is: it also comprises working indicating 11, and the indication control signal input end of described working indicating 11 connects the indication control signal output terminal of expansion port circuit 8.
Working indicating 11 is used for showing the blower fan group number of work.
Embodiment five: present embodiment is described in conjunction with Fig. 1, the difference of present embodiment and the described transformer cooling system integrated intelligent controller of embodiment one is: it also comprises failure alarm circuit 12, and the control signal input end of described failure alarm circuit 12 connects the alarm control signal output terminal of single chip circuit 6.
When temperature surpasses 80 ℃, failure alarm circuit 12 information that gives a warning.
Embodiment six: in conjunction with Fig. 1, present embodiment is described, the difference of present embodiment and embodiment one to five described transformer cooling system integrated intelligent controller is: described temperature sensing circuit 1 adopts the integrated two ends of AD590 type monolithic temperature-sensitive current source to realize.
The current value of the integrated two ends of AD590 type monolithic temperature-sensitive current source output is linear relationship with the absolute temperature of surveying, and temperature measurement range is-55 ℃～+ 150 ℃, and nonlinearity erron is ± 0.3 ℃, and 1 ℃ of its electric current of the every increase of temperature increases 1uA.The temperature signal gathered enters the first A/D converter 3 after the linear optical coupling isolation, is sent to single-chip microcomputer and is processed after the first A/D converter 3 analog to digital conversion.
Embodiment seven: in conjunction with Fig. 1, present embodiment is described, the difference of present embodiment and embodiment one to five described transformer cooling system integrated intelligent controller is: described single chip circuit 6 adopts AT89C51 type chip microcontroller.
Embodiment eight: in conjunction with Fig. 1, present embodiment is described, the difference of present embodiment and embodiment one to five described transformer cooling system integrated intelligent controller is: described current detection circuit 2 adopts a straight-through current transformer to realize.
Current detection circuit 2 adopts a straight-through current transformer to realize.The current analog amount that current detection circuit 2 collects enters the first A/D converter 3 after the linear optical coupling isolation, is sent to single-chip microcomputer and is processed after the first A/D converter 3 analog to digital conversion.
Embodiment nine: in conjunction with Fig. 1 and Fig. 2, present embodiment is described, the difference of present embodiment and embodiment one to five described transformer cooling system integrated intelligent controller is: described draught fan control circuit 10 adopts the SSR solid-state relay to realize.
Draught fan control circuit 10 adopts the SSR solid-state relay to realize.The SSR solid-state relay is a kind of contactless electronic switch, between its input and output, has adopted high withstand voltage photoelectrical coupler, has realized the electrical isolation of input with output, has guaranteed the normal operation of control circuit.Compare traditional mechanical relay and contactor, the advantage such as that the SSR solid-state relay has is contactless, no-spark is disturbed, life-span surge current long, corrosion-resistant, that can bear is large and drive current is little.The starting and stopping signal of blower fan is sent to photoisolator MOC3041 by single-chip microcomputer, and T1 is bidirectional triode thyristor, in MOC3041 inside, light emitting diode is not only arranged, and also has zero cross detection circuit and another bidirectional triode thyristor.When the A point has " 1 " signal, the lumination of light emitting diode in MOC3041, due to the synchronous effect of zero crossing circuitry, the bidirectional triode thyristor of MOC3041 inside is conducting at once after zero passage, thereby makes the T1 conducting, in blower fan, has electric current to pass through; When being input as " 0 " signal, in blower fan, no current passes through, thereby reaches starting and stopping and the rotation of blower fan.
The concrete structure of transformer cooling system integrated intelligent controller described in the utility model is not limited to the concrete technical scheme that the respective embodiments described above are put down in writing, and can also be the reasonable combination of the technical characterictic put down in writing of above-mentioned each embodiment.
Claims (9)
1. transformer cooling system integrated intelligent controller, it is characterized in that: it comprises temperature sensing circuit (1), current detection circuit (2), the first A/D converter (3), the second A/D converter (4), single chip circuit (6), draught fan control circuit (10) and motor protective circuit (13), described temperature sensing circuit (1) is for detection of temperature of oil in transformer, the temperature signal output terminal of described temperature sensing circuit (1) connects the signal input part of the first A/D converter (3), the signal output part of described the first A/D converter (3) connects the temperature signal input end of single chip circuit (6), current detection circuit (2) is for detection of the input current of the blower fan in transformer cooling system or oil-immersed pump, the current signal output end of described current detection circuit (2) connects the signal input part of the second A/D converter (4), the signal output part of the second A/D converter (4) connects the current signal input end of single chip circuit (6), the control signal input end of the air-blower control signal output part connecting fan control circuit (10) of described single chip circuit (6), the protection control signal output terminal of single chip circuit (6) connects the control signal input end of motor protective circuit (13).
2. transformer cooling system integrated intelligent controller according to claim 1, it is characterized in that: it also comprises the first tri-state gate circuit (5), the second tri-state gate circuit (7) and expansion port circuit (8), the signal output part of the first A/D converter (3) connects the temperature signal input end of single chip circuit (6) by the first tri-state gate circuit (5), the signal output part of the second A/D converter (4) connects the current signal input end of single chip circuit (6) by the first tri-state gate circuit (5), the data bus of single chip circuit (6) is connected with the data bus of expansion port circuit (8) by the second tri-state gate circuit (7), the air-blower control signal output part of single chip circuit (6) is by the control signal input end of the second tri-state gate circuit (7) and expansion port circuit (8) connecting fan control circuit (10).
3. transformer cooling system integrated intelligent controller according to claim 2, it is characterized in that: it also comprises digital display circuit (9), and the display control signal input end of described digital display circuit (9) connects the display control signal output terminal of expansion port circuit (8).
4. transformer cooling system integrated intelligent controller according to claim 2, it is characterized in that: it also comprises working indicating (11), and the indication control signal input end of described working indicating (11) connects the indication control signal output terminal of expansion port circuit (8).
5. transformer cooling system integrated intelligent controller according to claim 1, it is characterized in that: it also comprises failure alarm circuit (12), and the control signal input end of described failure alarm circuit (12) connects the alarm control signal output terminal of single chip circuit (6).
6. according to claim 1,2,3,4 or 5 described transformer cooling system integrated intelligent controllers, it is characterized in that: described temperature sensing circuit (1) adopts the integrated two ends of AD590 type monolithic temperature-sensitive current source to realize.
7. according to claim 1,2,3,4 or 5 described transformer cooling system integrated intelligent controllers, it is characterized in that: described single chip circuit (6) adopts AT89C51 type chip microcontroller.
8. according to claim 1,2,3,4 or 5 described transformer cooling system integrated intelligent controllers, it is characterized in that: described current detection circuit (2) adopts a straight-through current transformer to realize.
9. according to claim 1,2,3,4 or 5 described transformer cooling system integrated intelligent controllers, it is characterized in that: described draught fan control circuit (10) adopts the SSR solid-state relay to realize.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320465057 CN203350670U (en) | 2013-07-31 | 2013-07-31 | Transformer cooling system comprehensive and intelligent controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320465057 CN203350670U (en) | 2013-07-31 | 2013-07-31 | Transformer cooling system comprehensive and intelligent controller |
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| CN203350670U true CN203350670U (en) | 2013-12-18 |
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| CN 201320465057 Expired - Fee Related CN203350670U (en) | 2013-07-31 | 2013-07-31 | Transformer cooling system comprehensive and intelligent controller |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103389672A (en) * | 2013-07-31 | 2013-11-13 | 国家电网公司 | Comprehensive and intelligent controller of transformer cooling system and transformer cooling system control method of controller |
| CN106920642A (en) * | 2017-05-02 | 2017-07-04 | 句容市江电电器机械有限公司 | Cooling blower control method and system |
-
2013
- 2013-07-31 CN CN 201320465057 patent/CN203350670U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103389672A (en) * | 2013-07-31 | 2013-11-13 | 国家电网公司 | Comprehensive and intelligent controller of transformer cooling system and transformer cooling system control method of controller |
| CN106920642A (en) * | 2017-05-02 | 2017-07-04 | 句容市江电电器机械有限公司 | Cooling blower control method and system |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131218 Termination date: 20180731 |