CN103529876A - Dry-type transformer temperature control device with self-detecting function and working method thereof - Google Patents
Dry-type transformer temperature control device with self-detecting function and working method thereof Download PDFInfo
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Abstract
The invention discloses a dry-type transformer temperature control device with a self-detecting function. The dry-type transformer temperature control device with the self-detecting function comprises a temperature detecting and converting unit, a keyboard display unit, a fault processing unit, a main control unit, an output control unit, a cooling fan unit, a relay state detecting unit and a fan state detecting unit, wherein the main control unit is connected with the temperature detecting and converting unit, the keyboard display unit, the output control unit, the relay state detecting unit, the fan state detecting unit and the fault processing unit respectively; the relay state detecting unit is connected with the output control unit; the cooling fan unit is connected with the output control unit; the fan state detecting unit is connected with the cooling fan unit. The dry-type transformer temperature control device with the self-detecting function can detect the opening and closing state of the relay contact in the output control unit and the operating state of the cooling fan unit; once a relay fault or a fan fault occurs, the dry-type transformer temperature control device can raise an alarm in time and prompt fault information through an LED, thereby improving the reliability of equipment.
Description
Technical field
The present invention relates to a kind of dry-type transformer temperature control equipment, particularly a kind of temperature control equipment that can detect cooling blower duty and the duty of the relay of controlling cooling blower starting, stopping, belonging to automatic control technology field.
Background technology
The dry-type transformer place that is widely used, indispensable a kind of device when dry-type transformer temperature control equipment is dry-type transformer work.Temperature control equipment and dry-type transformer are installed in the middle of same cabinet, work under bad environment particularly summer and autumn environment temperature very high.The relay that control cooling blower starting, stops generally adopting the relay of closed, and under rugged surroundings, relay contact there will be fault, can not disconnect after not closed or closed.This fault causes blower fan not work to make transformer temperature rise rising until overtemperature alarm, or blower fan is worked always and shortened its serviceable life.On the other hand, whether whether cooling blower operation normally directly has influence on the temperature rise of dry-type transformer reasonable, the dry-type transformer temperature control equipment being employed at present is just realized the start-stop of blower fan according to transformer temperature height pilot relay, and the ruuning situation of cooling blower is not had to detection method, if blower fan stops transformer temperature rise rising until overtemperature alarm because of fault during actual motion.The misoperation of the overtemperature alarm that above-mentioned situation occurs or high temperature tripping operation, brings difficulty can to the analysis of causes of reporting to the police or tripping, and threaten the safe operation of transformer.
The dry-type transformer temperature control equipment of the present invention's design, can detect the folding condition of relay contact, fan operation state, once relay or the blower fan meeting of breaking down and alarm have solved the problems referred to above, has improved the reliability of equipment.
Summary of the invention
Fundamental purpose of the present invention is the weak point that solves current technology, provides a kind of can detection to control the relay contact state of fan operation and the dry-type transformer temperature control equipment of fan operation state.This device adopts PT100 platinum resistance to gather the winding temperature signal of dry-type transformer, and temperature signal after filtering amplifying circuit, A/D convertor circuit is sent into single-chip microcomputer.By by the comparison of dry-type transformer winding temperature and winding temperature setting value, when detected temperatures surpasses desired temperature, single-chip microcomputer sends signal control relay and connects crossing current cooling blower, realizes the temperature of dry-type transformer winding is controlled.The present invention has also designed relay status testing circuit and fan operation state detection circuit; if relay contact lost efficacy or blower fan lost efficacy; the circuit of design can signal to single-chip microcomputer, and single-chip microcomputer is realized the overtemperature prote to dry-type transformer by sound light alarming circuit or trip circuit.
Technical scheme of the present invention is:
A dry-type transformer temperature control equipment for self-checking function, comprises temperature detection converting unit, keyboard display unit, fault processing unit, main control unit, output control unit, cooling blower unit, relay status detecting unit, fan condition detecting unit; Wherein main control unit is connected with temperature detection converting unit, keyboard display unit, output control unit, relay status detecting unit, fan condition detecting unit, fault processing unit respectively; Relay status detecting unit is connected with output control unit; Cooling blower unit is connected with output control unit; Fan condition detecting unit is connected with cooling blower unit.
Described temperature detection converting unit comprises temperature sensing circuit, filter amplification circuit and analog to digital conversion circuit; Wherein temperature sensing circuit adopts Pt100 platinum resistance, and filter amplification circuit adopts operational amplifier LM358, and they are connected in series, and have three groups; It is the temperature of a phase winding of the Pt100 platinum resistance input end measuring dry-type transformer of each group, the output terminal of Pt100 platinum resistance connects the input end of an operational amplifier LM358, the output terminal of 3 operational amplifier LM358 is connected with 3 input ends of analog to digital conversion circuit, analog to digital conversion circuit is 8 successively approximation converter ADC0809, and the output terminal of ADC0809 is connected with the 89C52 single-chip microcomputer of main control unit.
Described main control unit adopts 89C52 single-chip microcomputer; 89C52 is connected with the photoelectrical coupler input end in ADC0809 output terminal in temperature detection converting unit, button in keyboard display unit and LED, fault processing unit, the photoelectrical coupler input end in output control unit, the photoelectric coupler output end in relay status detecting unit 7, the photoelectric coupler output end in fan condition detecting unit respectively.
Described keyboard display unit, comprises free-standing button, LED; Button, LED are connected with the 89C52 in main control unit respectively;
Described fault processing unit, comprises the first photoelectrical coupler, the first triode, hummer, relay K 1, for generation of sound and light alarm signal handling failure; Wherein the first photoelectrical coupler input end is connected with the 89C52 single-chip microcomputer of main control unit, the first photoelectric coupler output end is connected with the first transistor base by resistance, buzzer coil and one end after relay K 1 coils from parallel connection of coils other end that is connected with the first transistor collector is connected with power supply, the first transistor emitter ground connection, relay K 1 often open or normally closed contact is serially connected in control system of switching on or off electricity loop, dry-type transformer high-pressure side.
Described output control unit, comprises the second photoelectrical coupler, the second triode, relay K 2, for controlling the starting of cooling blower and stopping; Cooling blower unit, comprises crossing current cooling blower, for lowering the temperature to dry-type transformer; Wherein the second photoelectrical coupler input end is connected with the 89C52 single-chip microcomputer of main control unit, the second photoelectric coupler output end is connected with the second transistor base by resistance, the second transistor collector is connected with one end of relay K 2 coils, the other end of relay K 2 coils is connected with direct supply, the second transistor emitter ground connection; Normally opened contact one end of relay K 2 is connected with 220V AC power, and the other end connects one end of the crossing current cooling blower in cooling blower unit, and the other end of crossing current cooling blower is connected to 220V AC power.
Described relay status detecting unit, comprises resistance R 1, resistance R 2, resistance R 3, capacitor C 1, capacitor C 2, diode D1, diode D2, stabilivolt D3, the 3rd photoelectrical coupler U3; Wherein, resistance R 1 and capacitor C 1 form capacitance-resistance voltage reduction circuit, and diode D1, diode D2, capacitor C 2, stabilivolt D3, resistance R 2 form current rectifying and wave filtering circuit; The normally opened contact of the relay K 2 in output control unit and the crossing current cooling blower in cooling blower unit are series between power supply L line and N line; After resistance R 1 is in parallel with capacitor C 1, one end is connected with the crossing current cooling blower intersection point place in cooling blower unit with relay K 2 normally opened contacts in output control unit, the other end is connected with the negative electrode of diode D1 and the anode of diode D2, the negative electrode of diode D2 is connected with one end of resistance R 2 and the positive pole of capacitor C 2, the negative electrode of the anode of diode D1 and capacitor C 2 is connected with N line, the other end of resistance R 2 is connected with the negative electrode of stabilivolt D3 and 1 pin of the 3rd photoelectrical coupler U3, and 2 pin of the anode of stabilivolt D3 and the 3rd photoelectrical coupler U3 are connected with N line; 4 pin of the 3rd photoelectrical coupler U3 are connected with the IO mouth of 89C52 single-chip microcomputer in one end of resistance R 3 and main control unit 2, and the other end of resistance R 3 is connected with 5V power supply, are connected 3 pin of the 3rd photoelectrical coupler U3 and direct current.
Described fan condition detecting unit, comprises current transformer T1, resistance R 4, diode D4, diode D5, diode D6, diode D7, capacitor C 3, the 4th photoelectrical coupler U4; Wherein current transformer T1, resistance R 4, diode D4, D5, D6, D7 and capacitor C 3 form current rectifying and wave filtering circuit, and the 4th photoelectrical coupler U4 forms buffer circuit; Relay K 1 normally opened contact in output control unit and the crossing current cooling blower in cooling blower unit are series between power supply L line and N line and form loop; Current transformer T1 is connected in this loop, the two ends of current transformer T1 output contact resistance R4, and resistance R 4 one end are connected with the anode of diode D4 and the negative electrode of diode D5, and resistance R 4 other ends are connected with the anode of diode D6 and the negative electrode of diode D7; The negative electrode of diode D4, D6 is connected with the positive pole of capacitor C 3,1 pin of the 4th photoelectrical coupler U4.The anode of diode D5, D7 is connected with the negative pole of capacitor C 3,2 pin of the 4th photoelectrical coupler U4.4 pin of the 4th photoelectrical coupler U4 are connected with the IO mouth of 89C52 single-chip microcomputer in one end of resistance R 5 and main control unit 2, and the other end of resistance R 5 is connected with 5V power supply, are connected 3 pin of the 4th photoelectrical coupler U4 and direct current.
The method of work of the described dry-type transformer temperature control equipment with self-checking function, its step comprises:
(1), the device start that powers on, single-chip microcomputer self check, self check is changed by the AD of rear start-up temperature signal;
(2), the AD of each passage converts rear scanning button, if a button is pressed enters keystroke handling program, if be pressed the Transformer Winding temperature detecting and 80 ℃ are made comparisons without button;
(3) if winding temperature lower than 80 ℃ now blower fan do not need operation, detect the closed situation of the relay contact of controlling blower fan energising, if relay contact is in off-state, program is returned to AD conversion, if relay contact sends sound and light alarm in the closure state explanation relay device that breaks down;
(4) if winding temperature higher than 80 ℃ now blower fan need operation, detect the closed situation of the relay contact of controlling blower fan energising, if relay contact is in closure state, whether program continues to detect blower fan moves, if blower fan does not move explanation blower fan, the device that breaks down starts sound and light alarm;
(5) if blower fan normally moves, program continues to judge that whether winding temperature is over 130 ℃, if surpassing 130 ℃ of devices, winding temperature starts sound and light alarm, program continues to judge that whether winding temperature is over 150 ℃, if winding temperature surpasses 150 ℃ of device startup tripping operations, transformer and electrical network disengaging is sent to sound and light alarm simultaneously;
(6) if blower fan normally moves, program continues to judge whether winding temperature surpasses 130 ℃, if winding temperature does not surpass 130 ℃, program proceeds to AD conversion.
The invention has the beneficial effects as follows that device can detect the fan operation state in the folding condition of the relay contact in output control unit, cooling blower unit, once relay or blower fan break down, can give the alarm in time, improve the reliability of equipment.
The relay that control cooling blower starting, stops generally adopting the relay of closed, and under rugged surroundings, relay contact there will be fault, can not disconnect after not closed or closed.This fault causes blower fan not work to make transformer temperature rise rising until overtemperature alarm, or blower fan is worked always and shortened its serviceable life.On the other hand, whether whether cooling blower operation normally directly has influence on the temperature rise of dry-type transformer reasonable, the dry-type transformer temperature control equipment being employed at present is just realized the start-stop of blower fan according to transformer temperature height pilot relay, and the ruuning situation of cooling blower is not had to detection method, if fan trouble stops transformer temperature rise rising until overtemperature alarm during actual motion.The misoperation of the overtemperature alarm that above-mentioned situation occurs or high temperature tripping operation, brings difficulty can to the analysis of causes of reporting to the police or tripping, and threaten the safe operation of transformer.
Accompanying drawing explanation
Fig. 1 is circuit structure block diagram of the present invention;
Fig. 2 is the circuit diagram of relay status detecting unit;
Fig. 3 is the circuit diagram of fan condition detecting unit;
Fig. 4 is the program flow diagram with the dry-type transformer temperature control equipment of self-checking function.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.A kind of its circuit structure of dry-type transformer temperature control equipment as shown in Figure 1, comprises temperature detection converting unit 1, keyboard display unit 2, fault processing unit 3, main control unit 4, output control unit 5, cooling blower unit 6, relay status detecting unit 7, fan condition detecting unit 8; Wherein main control unit 4 is connected with temperature detection converting unit 1, keyboard display unit 2, output control unit 5, relay status detecting unit 7, fan condition detecting unit 8, fault processing unit 3 respectively; Relay status detecting unit 7 is connected with output control unit 5; Cooling blower unit 6 is connected with output control unit 5; Fan condition detecting unit 8 is connected with cooling blower unit 6.
Temperature detection converting unit 1 comprises temperature sensing circuit, filter amplification circuit and analog to digital conversion circuit; Wherein temperature sensing circuit adopt Pt100 platinum resistance, filter amplification circuit to adopt operational amplifier LM358 they are connected in series, have three groups; It is the temperature of a phase winding of the Pt100 platinum resistance input end measuring dry-type transformer of each group, the output terminal of Pt100 platinum resistance connects the input end of an operational amplifier LM358, the output terminal of 3 operational amplifier LM358 is connected with 3 input ends of analog to digital conversion circuit, analog to digital conversion circuit is 8 successively approximation converter ADC0809, and the output terminal of ADC0809 is connected with the 89C52 single-chip microcomputer of main control unit 4.Due to above-mentioned composition, temperature detection converting unit 1 is converted to digital signal input main control unit by transformer temperature value.
Main control unit 4 adopts 89C52 single-chip microcomputer; 89C52 is connected with the photoelectrical coupler input end in ADC0809 output terminal in temperature detection converting unit 1, button in keyboard display unit 2 and LED, fault processing unit 3, the photoelectrical coupler input end in output control unit 5, the photoelectric coupler output end in relay status detecting unit 7, the photoelectric coupler output end in fan condition detecting unit 8 respectively.
Output control unit 5, comprises the second photoelectrical coupler, the second triode, relay K 2, for controlling the starting of cooling blower and stopping; Cooling blower unit 6, comprises crossing current cooling blower, for lowering the temperature to dry-type transformer; Wherein the second photoelectrical coupler input end is connected with the 89C52 single-chip microcomputer of main control unit 4, the second photoelectric coupler output end is connected with the second transistor base by resistance, the second transistor collector is connected with one end of relay K 2 coils, the other end of relay K 2 coils is connected with direct supply, the second transistor emitter ground connection.Normally opened contact one end of relay K 2 is connected with 220V AC power, and the other end connects one end of the crossing current cooling blower in cooling blower unit 6, and the other end of crossing current cooling blower is connected to 220V AC power.
Figure 2 shows that the circuit theory diagrams of relay status detecting unit 7, comprise resistance R 1, resistance R 2, resistance R 3, capacitor C 1, capacitor C 2, diode D1, diode D2, stabilivolt D3, the 3rd photoelectrical coupler U3; Wherein, resistance R 1 and capacitor C 1 form capacitance-resistance voltage reduction circuit, and diode D1, diode D2, capacitor C 2, stabilivolt D3, resistance R 2 form current rectifying and wave filtering circuit; The normally opened contact of the relay K 2 in output control unit 5 and the crossing current cooling blower in cooling blower unit 6 are series between power supply L line and N line; After resistance R 1 and capacitor C 1 is in parallel, one end is connected with the crossing current cooling blower intersection point place in cooling blower unit 6 with the normally opened contact of relay K 2 in output control unit 5, the other end is connected with the negative electrode of diode D1 and the anode of diode D2, the negative electrode of diode D2 is connected with one end of resistance R 2 and the positive pole of capacitor C 2, the negative electrode of the anode of diode D1 and capacitor C 2 is connected with N line, the other end of resistance R 2 is connected with the negative electrode of stabilivolt D3 and 1 pin of the 3rd photoelectrical coupler U3, and 2 pin of the anode of stabilivolt D3 and the 3rd photoelectrical coupler U3 are connected with N line.4 pin of the 3rd photoelectrical coupler U3 are connected with the IO mouth of 89C52 single-chip microcomputer in one end of resistance R 3 and main control unit 2, and the other end of resistance R 3 is connected with 5V power supply, are connected 3 pin of the 3rd photoelectrical coupler U3 and direct current.
When main control unit 4 sends instruction, make relay K 2 normally opened contacts in output control unit 5 closed, the crossing current cooling blower in cooling blower unit 6 brings into operation.Now, relay status detecting unit 7 obtains electric work, photoelectrical coupler U3 conducting after resistance-capacitance depressurization, rectifying and voltage-stabilizing, and now 4 pin of photoelectrical coupler U3 are low level.When main control unit 4 sends instruction, relay K 2 normally opened contacts in output control unit 5 are disconnected, now 4 pin of photoelectrical coupler U3 are high level.The level signal of 4 pin of photoelectrical coupler U3 is sent into single-chip I/O mouth and just can judge that whether the duty of relay contact is consistent with main control unit 4 instruction of sending, if relay breaks down, main control unit 4 can send audible and visible alarm by fault processing unit 3.
Figure 3 shows that the circuit theory diagrams of fan condition detecting unit 8, comprise current transformer T1, resistance R 4, diode D4, diode D5, diode D6, diode D7, capacitor C 3, the 4th photoelectrical coupler U4.Wherein current transformer T1, resistance R 4, diode D4, D5, D6, D7 and capacitor C 3 form current rectifying and wave filtering circuit, and the 4th photoelectrical coupler U4 forms buffer circuit.The normally opened contact of the relay K 2 in output control unit 5 and the crossing current cooling blower in cooling blower unit 6 are series between power supply L line and N line and form loop.Current transformer T1 is connected in this loop, the two ends of current transformer T1 output contact resistance R4, and resistance R 4 one end are connected with the anode of diode D4 and the negative electrode of diode D5, and resistance R 4 other ends are connected with the anode of diode D6 and the negative electrode of diode D7.The negative electrode of diode D4, D6 is connected with the positive pole of capacitor C 3,1 pin of the 4th photoelectrical coupler U4.The anode of diode D5, D7 is connected with the negative pole of capacitor C 3,2 pin of the 4th photoelectrical coupler U4.4 pin of the 4th photoelectrical coupler U4 are connected with the IO mouth of 89C52 single-chip microcomputer in one end of resistance R 5 and main control unit 2, and the other end of resistance R 5 is connected with 5V power supply, are connected 3 pin of the 4th photoelectrical coupler U4 and direct current.
When main control unit 4 sends instruction, make relay K 2 normally opened contacts in output control unit 5 closed, the crossing current cooling blower in cooling blower unit 6 brings into operation.Now, in current transformer T1, there is electric current to flow through, this current flowing resistance R4 obtains voltage signal, the rectifier bridge that this voltage signal forms through diode D4, D5, D6, D7 and capacitor C 3 filtering input the 4th photoelectrical coupler U4, the 4th photoelectrical coupler U4 conducting, now 4 pin of the 4th photoelectrical coupler U4 are low level signal.If it is high level signal that crossing current cooling blower does not move 4 pin of the 4th photoelectrical coupler U4.The level signal of 4 pin of the 4th photoelectrical coupler U4 is sent into single-chip I/O mouth and just can judge that whether the duty of cooling blower is consistent with main control unit 4 instruction of sending, if cooling blower breaks down, main control unit 4 can send audible and visible alarm by fault processing unit 3.
Fig. 4 is the method for work with the dry-type transformer temperature control equipment of self-checking function, and its step comprises:
1, the device start that powers on, single-chip microcomputer self check, self check is changed by the AD of rear start-up temperature signal;
2, the AD of each passage converts rear scanning button, if a button is pressed enters keystroke handling program, if be pressed the Transformer Winding temperature detecting and 80 ℃ are made comparisons without button;
If 3 winding temperatures lower than 80 ℃ now blower fan do not need operation, detect the closed situation of the relay contact of controlling blower fan energising, if relay contact is in off-state, program is returned to AD conversion, if relay contact sends sound and light alarm in the closure state explanation relay device that breaks down.
If 4 winding temperatures higher than 80 ℃ now blower fan need operation, detect the closed situation of the relay contact of controlling blower fan energising, if relay contact is in closure state, whether program continues to detect blower fan moves, if blower fan does not move explanation blower fan, the device that breaks down starts sound and light alarm;
If 5 blower fans normally move, program continues to judge that whether winding temperature is over 130 ℃, if surpassing 130 ℃ of devices, winding temperature starts sound and light alarm, program continues to judge that whether winding temperature is over 150 ℃, if winding temperature surpasses 150 ℃ of device startup tripping operations, transformer and electrical network disengaging is sent to sound and light alarm simultaneously;
If 6 blower fans normally move, program continues to judge whether winding temperature surpasses 130 ℃, if winding temperature does not surpass 130 ℃, program proceeds to AD conversion.
By composition and the operational process of said apparatus, the present invention has not only realized the real-time detection of dry-type transformer winding temperature and timely cooling to dry-type transformer winding, and can detect the duty of relay contact and the duty of cooling blower self of controlling cooling blower operation, can avoid dry-type transformer because overtemperature work damages, improve dry-type transformer reliability of operation.
Unaccomplished matter of the present invention is known technology.
Claims (9)
1. a dry-type transformer temperature control equipment with self-checking function, is characterized by this device and comprises temperature detection converting unit, keyboard display unit, fault processing unit, main control unit, output control unit, cooling blower unit, relay status detecting unit, fan condition detecting unit; Wherein main control unit is connected with temperature detection converting unit, keyboard display unit, output control unit, relay status detecting unit, fan condition detecting unit, fault processing unit respectively; Relay status detecting unit is connected with output control unit; Cooling blower unit is connected with output control unit; Fan condition detecting unit is connected with cooling blower unit.
2. the dry-type transformer temperature control equipment with self-checking function as claimed in claim 1, is characterized by described temperature detection converting unit and comprises temperature sensing circuit, filter amplification circuit and analog to digital conversion circuit; Wherein temperature sensing circuit adopts Pt100 platinum resistance, and filter amplification circuit adopts operational amplifier LM358, and they are connected in series, and have three groups; It is the temperature of a phase winding of the Pt100 platinum resistance input end measuring dry-type transformer of each group, the output terminal of Pt100 platinum resistance connects the input end of an operational amplifier LM358, the output terminal of 3 operational amplifier LM358 is connected with 3 input ends of analog to digital conversion circuit, analog to digital conversion circuit is 8 successively approximation converter ADC0809, and the output terminal of ADC0809 is connected with the 89C52 single-chip microcomputer of main control unit.
3. the dry-type transformer temperature control equipment with self-checking function as claimed in claim 1, is characterized by described main control unit and adopts 89C52 single-chip microcomputer; 89C52 is connected with the photoelectrical coupler input end in ADC0809 output terminal in temperature detection converting unit, button in keyboard display unit and LED, fault processing unit, the photoelectrical coupler input end in output control unit, the photoelectric coupler output end in relay status detecting unit 7, the photoelectric coupler output end in fan condition detecting unit respectively.
4. the dry-type transformer temperature control equipment with self-checking function as claimed in claim 1, is characterized by described keyboard display unit, comprises free-standing button, LED; Button, LED are connected with the 89C52 in main control unit respectively.
5. the dry-type transformer temperature control equipment with self-checking function as claimed in claim 1, it is characterized by described fault processing unit, comprise the first photoelectrical coupler, the first triode, hummer, relay K 1, for generation of sound and light alarm signal handling failure; Wherein the first photoelectrical coupler input end is connected with the 89C52 single-chip microcomputer of main control unit, the first photoelectric coupler output end is connected with the first transistor base by resistance, buzzer coil and one end after relay K 1 coils from parallel connection of coils other end that is connected with the first transistor collector is connected with power supply, the first transistor emitter ground connection, relay K 1 often open or normally closed contact is serially connected in control system of switching on or off electricity loop, dry-type transformer high-pressure side.
6. the dry-type transformer temperature control equipment with self-checking function as claimed in claim 1, is characterized by described output control unit, comprises the second photoelectrical coupler, the second triode, relay K 2, for controlling the starting of cooling blower and stopping; Cooling blower unit, comprises crossing current cooling blower, for lowering the temperature to dry-type transformer; Wherein the second photoelectrical coupler input end is connected with the 89C52 single-chip microcomputer of main control unit, the second photoelectric coupler output end is connected with the second transistor base by resistance, the second transistor collector is connected with one end of relay K 2 coils, the other end of relay K 2 coils is connected with direct supply, the second transistor emitter ground connection; Normally opened contact one end of relay K 2 is connected with 220V AC power, and the other end connects one end of the crossing current cooling blower in cooling blower unit, and the other end of crossing current cooling blower is connected to 220V AC power.
7. the dry-type transformer temperature control equipment with self-checking function as claimed in claim 1, it is characterized by described relay status detecting unit, comprise resistance R 1, resistance R 2, resistance R 3, capacitor C 1, capacitor C 2, diode D1, diode D2, stabilivolt D3, the 3rd photoelectrical coupler U3; Wherein, resistance R 1 and capacitor C 1 form capacitance-resistance voltage reduction circuit, and diode D1, diode D2, capacitor C 2, stabilivolt D3, resistance R 2 form current rectifying and wave filtering circuit; The normally opened contact of the relay K 2 in output control unit and the crossing current cooling blower in cooling blower unit are series between power supply L line and N line; After resistance R 1 and capacitor C 1 is in parallel, one end is connected with the crossing current cooling blower intersection point place in cooling blower unit with the normally opened contact of relay K 2 in output control unit, the other end is connected with the negative electrode of diode D1 and the anode of diode D2, the negative electrode of diode D2 is connected with one end of resistance R 2 and the positive pole of capacitor C 2, the negative electrode of the anode of diode D1 and capacitor C 2 is connected with N line, the other end of resistance R 2 is connected with the negative electrode of stabilivolt D3 and 1 pin of the 3rd photoelectrical coupler U3, and 2 pin of the anode of stabilivolt D3 and the 3rd photoelectrical coupler U3 are connected with N line; 4 pin of the 3rd photoelectrical coupler U3 are connected with the IO mouth of 89C52 single-chip microcomputer in one end of resistance R 3 and main control unit 2, and the other end of resistance R 3 is connected with 5V power supply, are connected 3 pin of the 3rd photoelectrical coupler U3 and direct current.
8. the dry-type transformer temperature control equipment with self-checking function as claimed in claim 1, it is characterized by described fan condition detecting unit, comprise current transformer T1, resistance R 4, diode D4, diode D5, diode D6, diode D7, capacitor C 3, the 4th photoelectrical coupler U4; Wherein current transformer T1, resistance R 4, diode D4, D5, D6, D7 and capacitor C 3 form current rectifying and wave filtering circuit, and the 4th photoelectrical coupler U4 forms buffer circuit; Relay K 2 normally opened contacts in output control unit and the crossing current cooling blower in cooling blower unit are series between power supply L line and N line and form loop; Current transformer T1 is connected in this loop, the two ends of current transformer T1 output contact resistance R4, and resistance R 4 one end are connected with the anode of diode D4 and the negative electrode of diode D5, and resistance R 4 other ends are connected with the anode of diode D6 and the negative electrode of diode D7; The negative electrode of diode D4, D6 is connected with the positive pole of capacitor C 3,1 pin of the 4th photoelectrical coupler U4; The anode of diode D5, D7 is connected with the negative pole of capacitor C 3,2 pin of the 4th photoelectrical coupler U4; 4 pin of the 4th photoelectrical coupler U4 are connected with the IO mouth of 89C52 single-chip microcomputer in one end of resistance R 5 and main control unit 2, and the other end of resistance R 5 is connected with 5V power supply, are connected 3 pin of the 4th photoelectrical coupler U4 and direct current.
9. the method for work with the dry-type transformer temperature control equipment of self-checking function as claimed in claim 1, is characterized by and comprise the steps:
(1), the device start that powers on, single-chip microcomputer self check, self check is changed by the AD of rear start-up temperature signal;
(2), the AD of each passage converts rear scanning button, if a button is pressed enters keystroke handling program, if be pressed the Transformer Winding temperature detecting and 80 ℃ are made comparisons without button;
(3) if winding temperature lower than 80 ℃ now blower fan do not need operation, detect the closed situation of the relay contact of controlling blower fan energising, if relay contact is in off-state, program is returned to AD conversion, if relay contact sends sound and light alarm in the closure state explanation relay device that breaks down;
(4) if winding temperature higher than 80 ℃ now blower fan need operation, detect the closed situation of the relay contact of controlling blower fan energising, if relay contact is in closure state, whether program continues to detect blower fan moves, if blower fan does not move explanation blower fan, the device that breaks down starts sound and light alarm;
(5) if blower fan normally moves, program continues to judge that whether winding temperature is over 130 ℃, if surpassing 130 ℃ of devices, winding temperature starts sound and light alarm, program continues to judge that whether winding temperature is over 150 ℃, if winding temperature surpasses 150 ℃ of device startup tripping operations, transformer and electrical network disengaging is sent to sound and light alarm simultaneously;
(6) if blower fan normally moves, program continues to judge whether winding temperature surpasses 130 ℃, if winding temperature does not surpass 130 ℃, program proceeds to AD conversion.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310534292.2A CN103529876B (en) | 2013-10-31 | 2013-10-31 | Dry-type transformer temperature control device with self-detecting function and working method thereof |
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|---|---|---|---|
| CN201310534292.2A CN103529876B (en) | 2013-10-31 | 2013-10-31 | Dry-type transformer temperature control device with self-detecting function and working method thereof |
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| CN103529876A true CN103529876A (en) | 2014-01-22 |
| CN103529876B CN103529876B (en) | 2015-07-01 |
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| CN (1) | CN103529876B (en) |
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| CN108107948A (en) * | 2017-12-20 | 2018-06-01 | 合肥齐泰光电科技有限公司 | A kind of Temperature Controller for Dry-Type Transformer |
| CN109445491A (en) * | 2018-12-21 | 2019-03-08 | 益和电气集团股份有限公司 | Intelligent transformer temperature controller and its working method |
| CN110426314A (en) * | 2019-09-04 | 2019-11-08 | 上海乐研电气有限公司 | On-line sampling check-up gas density electrical relay with defencive function |
| CN113579415A (en) * | 2021-08-04 | 2021-11-02 | 重庆凯米尔汽油机有限公司 | Welding air pressure double-system peak staggering coordination distribution device and method |
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| US20070241852A1 (en) * | 2006-04-14 | 2007-10-18 | Goudreau Joel S | Transformer with foamed insulating material and method of manufacturing the same |
| CN102053634A (en) * | 2009-10-27 | 2011-05-11 | 苏州金山门变压器有限公司 | Intelligent temperature controller for dry-type transformer |
| CN101937241A (en) * | 2010-09-07 | 2011-01-05 | 山东达驰电气有限公司 | Electronic temperature controller of transformer |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108107948A (en) * | 2017-12-20 | 2018-06-01 | 合肥齐泰光电科技有限公司 | A kind of Temperature Controller for Dry-Type Transformer |
| CN109445491A (en) * | 2018-12-21 | 2019-03-08 | 益和电气集团股份有限公司 | Intelligent transformer temperature controller and its working method |
| CN110426314A (en) * | 2019-09-04 | 2019-11-08 | 上海乐研电气有限公司 | On-line sampling check-up gas density electrical relay with defencive function |
| CN113579415A (en) * | 2021-08-04 | 2021-11-02 | 重庆凯米尔汽油机有限公司 | Welding air pressure double-system peak staggering coordination distribution device and method |
| CN113579415B (en) * | 2021-08-04 | 2022-08-12 | 重庆市凯米尔动力机械有限公司 | Welding air pressure double-system peak staggering coordination distribution device and method |
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