CN201556071U - Intelligent control circuit of water-cooling system of gas transformer - Google Patents
Intelligent control circuit of water-cooling system of gas transformer Download PDFInfo
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- CN201556071U CN201556071U CN2009201046384U CN200920104638U CN201556071U CN 201556071 U CN201556071 U CN 201556071U CN 2009201046384 U CN2009201046384 U CN 2009201046384U CN 200920104638 U CN200920104638 U CN 200920104638U CN 201556071 U CN201556071 U CN 201556071U
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Abstract
An intelligent control circuit of a water-cooling system of a gas transformer is used for improving the reliability of the water-cooling system of the gas transformer. The intelligent control circuit adopts the technical scheme that a control circuit is composed of a switching signal input circuit, an analog signal input circuit, a PLC and an executive circuit, wherein output terminals of the switch signal input circuit and the analog signal input circuit are connected with an input terminal of the PLC; an input terminal of the executive circuit is connected with an output terminal of the PLC; and the output terminal of the executive circuit controls all gas-water coolers, water pumps and cooling towers, which are connected with the gas transformer. Compared with the conventional control circuit of the water-cooling system of the gas transformer, the utility model has the advantages of perfect control function, high operation reliability, and unattended power station.
Description
Technical field
The utility model relates to a kind of control circuit of transformer cooling system, and especially a kind of circuit that is used to control the variable pressure gas device water cooling system with UTILIZATION OF VESIDUAL HEAT IN function belongs to the control technology field.
Background technology
Cooling system is an important component part of transformer, to the important role in safe operation of transformer.The cooling system of variable pressure gas device is generally by the some air water refrigeratorys (comprising air water interchanger, air pump and valve), the water pump that are connected with transformer-cabinet be arranged on ground cooling tower and constitute, and what have also is provided with residual heat using device, as shown in Figure 1.The quality of transformer cooling system performance depends on its control system to a great extent, the cooling system of tradition variable pressure gas device only utilizes simple relay circuit that its each parts are controlled, to guarantee the normal operation of variable pressure gas device, its shortcoming is that circuit structure is simple, control function is single, poor reliability can not be implemented effective monitoring to the variable pressure gas device, more can't realize the unmanned in power station.
At present, the water cooling system of variable pressure gas device is increasing, objectively requires the control of water-cooling system reliably and perfect more, and traditional cooling system control circuit can't meet the demands at all.Therefore, develop a kind of perfect in shape and function, variable pressure gas device water cooling system intelligence control circuit that reliability is high is the current problems that face of relevant technologies personnel.
Summary of the invention
The purpose of this utility model is to provide the variable pressure gas device water cooling system that a kind of control function is perfect, reliability is high intelligence control circuit.
The alleged problem of the utility model realizes with following technical proposals:
A kind of variable pressure gas device water cooling system intelligence control circuit, form by switching signal input circuit, analog signal input circuit, PLC and executive circuit, the input end of the output termination PLC of described switching signal input circuit and analog signal input circuit, the output terminal of the input termination PLC of described executive circuit, each air water refrigeratory, water pump and cooling tower that output terminal control is connected with the variable pressure gas device.
Above-mentioned gas transformer water cooling system intelligence control circuit, described executive circuit is made of 11 contactors, their control coil connects Q0.0～Q0.7 and the Q1.0～Q1.2 end of PLC respectively, the normally opened contact of first contactor is connected between the unlatching control end of the power supply and the first refrigeratory valve, and normally closed contact is connected between the closing control end of the power supply and the first refrigeratory valve; The normally opened contact of second contactor is controlled the first refrigeratory air pump; The normally opened contact of the 3rd contactor is connected between the unlatching control end of the power supply and the second refrigeratory valve, and normally closed contact is connected between the closing control end of the power supply and the second refrigeratory valve; The normally opened contact of the 4th contactor is controlled the second refrigeratory air pump; The normally opened contact of the 5th contactor is connected between the unlatching control end of power supply and the 3rd refrigeratory valve, and normally closed contact is connected between the closing control end of power supply and the 3rd refrigeratory valve; The normally opened contact of the 6th contactor is controlled the 3rd refrigeratory air pump; The normally opened contact of the 7th contactor is controlled first water pump; The normally opened contact of the 8th contactor is controlled second water pump; The normally opened contact of the 9th contactor, the tenth contactor and the 11 contactor is controlled three fans of cooling tower respectively.
Above-mentioned gas transformer water cooling system intelligence control circuit, described switching signal input circuit comprises transformer switching circuit breaker auxiliary contact, top layer gas temperature switch, the water route temperature switch, the cooling tower temperature switch, three air-flow detector switches and three current detector switches, the output signal of described transformer switching circuit breaker auxiliary contact connects the I1.1 end of PLC, the output signal of described top layer gas temperature switch connects the I0.6 end of PLC, the output signal of described water route temperature switch connects the I1.0 end of PLC, the output signal of described cooling tower temperature switch connects the I0.7 end of PLC, described three air-flow detector switches are installed on respectively in the gas circuit of three refrigeratorys, their output signal meets the I0.0 of PLC respectively, I0.1, the I0.2 end, described three current detector switches are installed on respectively in the water route of three refrigeratorys, and their output signal meets the I0.3 of PLC respectively, I0.4, the I0.5 end.
Above-mentioned gas transformer water cooling system intelligence control circuit, described analog signal input circuit is made of the top layer gas temperature sensor, the PIWO end of the output termination PLC of described top layer gas temperature sensor.
The utility model utilizes the switching signal input circuit to gather the temperature switch signal and the status switch signal of transformer and water cooling system diverse location thereof, utilize analog signal input circuit to gather transformer top layer gas temperature signal in real time, programmable controller PLC analyzes the various signals of being gathered, and, control the operation of each refrigeratory and cooling tower automatically to executive circuit output control signal.Control circuit with traditional variable pressure gas device water cooling system is compared, and the utility model control function is perfect, operational reliability is high, can realize the unmanned in power station.
Description of drawings
Fig. 1 is the electrical schematic diagram of variable pressure gas device water cooling system;
Fig. 2 is an electric theory diagram of the present utility model;
Fig. 3 is PLC control principle figure;
Fig. 4 is each contacts of contactor connection layout.
Each symbol is among the figure: T, the variable pressure gas device, LQ1, LQ2, LQ3, the air water refrigeratory, LT, cooling tower, F1, F2, F3, the cooling tower fan, H1, H2, H3, the air water interchanger, A1, A2, A3, air pump, V1, V2, V3, valve, P1, P2, water pump, ST, electric three passes, M, drive motor in the electric three passes, YR, residual heat using device, t, temperature sensor, Rt, the top layer gas temperature sensor, W, temperature controller, QL1, QL2, QL3, the air-flow detector switch, SL1, SL2, SL3, the current detector switch, BT, top layer gas temperature switch, AK, the cooling tower temperature switch, WK, the water route temperature switch, BY, transformer switching circuit breaker auxiliary contact, JC1～JC11, contactor, JC1-1～JC11-1, JC1-2, JC3-2, JC5-2, the contact of contactor JC1～JC11.
Embodiment
Referring to Fig. 1, variable pressure gas device cooling system is by three refrigeratory (LQ1 the heat of transformer generation in service, LQ2, LQ3) (A1～A3) is transported to air water interchanger (H1～H3) to the air pump in the gas circuit, (carry out heat interchange among the H1～H3) at the air water interchanger, the entrained heat of gas in the gas circuit is sent in the water route, then by the valve in the water route (V1～V3) and water pump (P1, P2) heat is sent to bootstrap system, bootstrap system becomes thermal power transfer electric energy to go to drive air-conditioning system, the variable pressure gas device is dispelled the heat, (V1～V3) and the water pump (P1 of the valve in the water route simultaneously, P2) also heat is sent to cooling tower LT, LT dispels the heat by cooling tower.
In Fig. 1, temperature sensor t detects the water route temperature of cooling system, and water temperature signal is sent to the input end of temperature controller W (model is E5EN), temperature controller W converts the water route temperature signal to the electric signal of 4～20mA, this signal inserts the analog quantity input end of electric three passes, electric three passes is again according to the analog signals of input, by its inner drive motor M opening angle of control valve linearly, to regulate the water yield size of cooling tower.
Referring to Fig. 3, Fig. 1, the air-flow detector switch QL1 in the switching signal input circuit, QL2, QL3 are installed on respectively in the gas circuit of three refrigeratorys of variable pressure gas device, and output signal is received input end I0.0, I0.1, the I0.2 of Programmable Logic Controller PLC respectively.When the air-flow detector switch detected gas path failure, corresponding refrigeratory was out of service.Current detector switch SL1 in the switching signal input circuit, SL2, SL3 are installed in the water route of three variable pressure gas device cooling systems, and when certain current detector switch detected the water route fault, corresponding refrigeratory was out of service.When the variable pressure gas device brings into operation, the auxiliary break contact BY of the isolating switch of switching transformer opens, send the transformer run signal, this signal is received the input end I1.1 of Programmable Logic Controller PLC, when Programmable Logic Controller PLC receives the transformer run signal, start one group of refrigeratory automatically and dispel the heat.Water temperature in the cooling system water route is measured by temperature sensor t (model is RTD11), temperature sensor t (RTD11) is sent to temperature controller W to detected water route temperature signal, temperature controller W dispels the heat to the variable pressure gas device according to the angle that the temperature of user's setting is opened electric three passes ST, simultaneously, the water route temperature switch WK of temperature controller W sends corresponding switching signal to PLC.Equally, the temperature of cooling tower LT is measured by another temperature sensor, this temperature sensor is sent to another temperature controller to the water tower temperature of measuring, the cooling tower temperature switch AK of this temperature controller sends corresponding switching signal to PLC, and three fan F1, F2, F3 that the temperature of being set according to the user by PLC starts on the cooling tower come cooling tower is dispelled the heat.
The output of top layer gas temperature sensor Rt be analog signals, this signal is the top layer gas temperature of variable pressure gas device, receive the input end PIWO of Programmable Logic Controller PLC analog module, the RS485 communication by Programmable Logic Controller PLC uploads to the pulpit then.
Executive circuit is made of the contactor JC1～JC11 of Programmable Logic Controller PLC control.Variable pressure gas device water cooling system is divided into three groups to refrigeratory, and wherein one group is the work refrigeratory, and one group is auxiliary cooler, and one group is standby refrigeratory.Contact JC1-1, the JC1-2 of JC1 controls first group of valve V1 in the refrigeratory, when Programmable Logic Controller PLC output terminal Q0.0 output high level, contactor JC1 coil is charged, and its normally opened contact JC1-1 closure, normally closed contact JC1-2 open, and electrically operated valve V1 is in open mode, simultaneously, PLC output terminal Q0.1 exports high level, and it is electric that the coil of contactor JC2 is got, its normally opened contact JC2-1 closure, the air pump work of first group of refrigeratory, first group of refrigeratory duty.When the Q0.0 of Programmable Logic Controller PLC output low level, contactor JC1 coil blackout, its normally opened contact JC1-1 opens, normally closed contact JC1-2 closure, electrically operated valve V1 is in closed condition, simultaneously, and PLC output terminal Q0.1 output low level, make the coil blackout of contactor JC2, its normally opened contact JC2-1 opens, and the air pump A1 of first group of refrigeratory does not work, and first group of refrigeratory is in closed condition.The principle of work of second group of refrigeratory, the 3rd group of refrigeratory is with first group of refrigeratory.
Programmable Logic Controller PLC totally respectively organizes the working time of refrigeratory automatically, and auto arrangement is respectively organized the priority task order of refrigeratory.When the variable pressure gas device brings into operation, the auxiliary break contact BY of the isolating switch of its switching transformer opens, send the transformer run signal, when Programmable Logic Controller PLC receives the transformer run signal, start working time the shortest one group of refrigeratory automatically and dispel the heat as the work refrigeratory; When the top layer gas temperature of variable pressure gas device reached user's setting value, the I0.6 input end of Programmable Logic Controller PLC received input signal, automatically dropped into one group of refrigeratory by length working time of refrigeratory and dispelled the heat as auxiliary cooler; When occurring fault such as gas path failure or water route fault during in work when work refrigeratory or auxiliary cooler, the I0.0 of Programmable Logic Controller PLC～I0.1 input end receives fault input signal, Programmable Logic Controller is out of service the fault refrigeratory automatically, and standby refrigeratory is devoted oneself to work.After fault refrigeratory fault is eliminated, begin the state of resuming work, standby refrigeratory is out of service.
Two water pumps of refrigeratory are standby each other, and rotate the one action state every 30 days.When the variable pressure gas device brings into operation, the auxiliary break contact BY of the isolating switch of its switching transformer opens, send the transformer run signal, when Programmable Logic Controller PLC receives the transformer run signal, its Q0.6 exports high level automatically, the coil of contactor JC7 gets electric, its normally opened contact JC7-1 closure, and first water pump P 1 puts into operation.When first water pump P 1 breaks down (this moment, current detector switch SL1, SL2, the SL3 of all refrigeratorys all exported fault-signal), it is out of service that Programmable Logic Controller PLC drops into second water pump P, 2, the first water pump P 1 automatically.After first water pump P, 1 fault is eliminated, recover original running status, second water pump P 2 is out of service.After first water pump P 1 was moved 30 days, Programmable Logic Controller PLC dropped into second water pump P, 2, the first water pump P 1 automatically and quits work.When second water pump P, 2 duration of works broke down, second water pump P 2 quit work, and first water pump P 1 puts into operation automatically.After the fault of second water pump P 2 was eliminated, second water pump P 2 was recovered original duty, first water pump P, 1 automatic state out of service automatically.
The duty of three cooling tower fan electromotors is to be controlled according to the top layer gas temperature of variable pressure gas device, the water route temperature and the cooling tower ambient air temperature of cooling system by Programmable Logic Controller PLC.And these three temperature values be can be artificial set.When the water route of cooling system temperature is higher than user's setting value, the Q1.0 of Programmable Logic Controller PLC end output high level, the coil of contactor JC9 is charged, its normally opened contact JC9-1 closure, the first fan F1 puts into operation.When the water route of cooling system temperature is higher than user's setting value and cooling tower ambient air temperature and also is higher than user's setting value, the Q1.0 of Programmable Logic Controller PLC and Q1.1 end are exported high level simultaneously, the coil of contactor JC9 and JC10 is charged, its normally opened contact JC9-1, JC10-1 closure, the first fan F1 and the second fan F2 put into operation.When the gas temperature that is higher than user's setting value and variable pressure gas device when the water route of cooling system temperature also is higher than user's setting value, start the first fan F1 and the second fan F2 simultaneously.When the water route temperature of the top layer gas temperature of variable pressure gas device, cooling system and cooling tower ambient air temperature all are higher than user's setting value, the Q1.0 of Programmable Logic Controller PLC, Q1.1 and Q1.2 export high level, the coil of contactor JC9, JC10 and JC11 is charged, its normally opened contact JC9-1, JC10-1, JC11-1 closure start the first fan F1, the second fan F2 and three fan F3 simultaneously and dispel the heat.
Claims (4)
1. variable pressure gas device water cooling system intelligence control circuit, it is characterized in that, it is made up of switching signal input circuit, analog signal input circuit, PLC and executive circuit, the input end of the output termination PLC of described switching signal input circuit and analog signal input circuit, the output terminal of the input termination PLC of described executive circuit, each air water refrigeratory (LQ1, LQ2, LQ3), water pump (P1, P2) and cooling tower (LT) that output terminal control is connected with variable pressure gas device (T).
2. according to the described variable pressure gas device of claim 1 water cooling system intelligence control circuit, it is characterized in that, described executive circuit is made of 11 contactors, be called first contactor, second contactor, the 3rd contactor, the 4th contactor, the 5th contactor, the 6th contactor, the 7th contactor, the 8th contactor, the 9th contactor, the tenth contactor, the 11 contactor, their control coil connects Q0.0～Q0.7 and the Q1.0～Q1.2 end of PLC respectively, the normally opened contact (JC1-1) of first contactor (JC1) is connected between the unlatching control end of the power supply and the first refrigeratory valve (V1), and normally closed contact (JC1-2) is connected between the closing control end of the power supply and the first refrigeratory valve (V1); Normally opened contact (JC2-1) the control first refrigeratory air pump (A1) of second contactor (JC2); The normally opened contact (JC3-1) of the 3rd contactor (JC3) is connected between the unlatching control end of the power supply and the second refrigeratory valve (V2), and normally closed contact (JC3-2) is connected between the closing control end of the power supply and the second refrigeratory valve (V2); Normally opened contact (JC4-1) the control second refrigeratory air pump (A2) of the 4th contactor (JC4); The normally opened contact (JC5-1) of the 5th contactor (JC5) is connected between the unlatching control end of power supply and the 3rd refrigeratory valve (V3), and normally closed contact (JC5-2) is connected between the closing control end of power supply and the 3rd refrigeratory valve (V3); Normally opened contact (JC6-1) control the 3rd refrigeratory air pump (A3) of the 6th contactor (JC6); Normally opened contact (JC7-1) control first water pump (P1) of the 7th contactor (JC7); Normally opened contact (JC8-1) control second water pump (P2) of the 8th contactor (JC8); The normally opened contact of the 9th contactor (JC9), the tenth contactor (JC10) and the 11 contactor (JC11) is controlled three fans of cooling tower (LT) respectively.
3. according to claim 1 or 2 described variable pressure gas device water cooling system intelligence control circuits, it is characterized in that, described switching signal input circuit comprises transformer switching circuit breaker auxiliary contact (BY), top layer gas temperature switch (BT), water route temperature switch (WK), cooling tower temperature switch (AK), three air-flow detector switches and three current detector switches, the output signal of described transformer switching circuit breaker auxiliary contact (BY) connects the I1.1 end of PLC, the output signal of described top layer gas temperature switch (BT) connects the I0.6 end of PLC, the output signal of described water route temperature switch (WK) connects the I1.0 end of PLC, the output signal of described cooling tower temperature switch (AK) connects the I0.7 end of PLC, described three air-flow detector switches are installed on respectively in the gas circuit of three refrigeratorys, their output signal meets the I0.0 of PLC respectively, I0.1, the I0.2 end, described three current detector switches are installed on respectively in the water route of three refrigeratorys, and their output signal meets the I0.3 of PLC respectively, I0.4, the I0.5 end.
4. according to the described variable pressure gas device of claim 3 water cooling system intelligence control circuit, it is characterized in that, described analog signal input circuit is made of top layer gas temperature sensor (Rt), the PIW0 end of the output termination PLC of described top layer gas temperature sensor (Rt).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201046384U CN201556071U (en) | 2009-09-14 | 2009-09-14 | Intelligent control circuit of water-cooling system of gas transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201046384U CN201556071U (en) | 2009-09-14 | 2009-09-14 | Intelligent control circuit of water-cooling system of gas transformer |
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| Publication Number | Publication Date |
|---|---|
| CN201556071U true CN201556071U (en) | 2010-08-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201046384U Expired - Fee Related CN201556071U (en) | 2009-09-14 | 2009-09-14 | Intelligent control circuit of water-cooling system of gas transformer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104238590A (en) * | 2013-06-09 | 2014-12-24 | 成都昊地科技有限责任公司 | Novel intelligent cooling device of transformer |
| CN105652774A (en) * | 2014-11-10 | 2016-06-08 | 中国船舶重工集团公司第七二三研究所 | Refrigeration device control system |
-
2009
- 2009-09-14 CN CN2009201046384U patent/CN201556071U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104238590A (en) * | 2013-06-09 | 2014-12-24 | 成都昊地科技有限责任公司 | Novel intelligent cooling device of transformer |
| CN105652774A (en) * | 2014-11-10 | 2016-06-08 | 中国船舶重工集团公司第七二三研究所 | Refrigeration device control system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100818 Termination date: 20130914 |