CN202018607U - Temperature intelligent monitoring system for digital transformer - Google Patents
Temperature intelligent monitoring system for digital transformer Download PDFInfo
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- CN202018607U CN202018607U CN2011201041212U CN201120104121U CN202018607U CN 202018607 U CN202018607 U CN 202018607U CN 2011201041212 U CN2011201041212 U CN 2011201041212U CN 201120104121 U CN201120104121 U CN 201120104121U CN 202018607 U CN202018607 U CN 202018607U
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Abstract
The utility model discloses a temperature intelligent monitoring system for a digital transformer, which comprises a double power supply automatic switching protector for detecting, switching and protecting two power supplies, a winding temperature monitor for calculating and displaying the temperature of the winding, a in-box temperature and humidity controller for controlling and displaying temperature and humidity in the box, and a cooler driving and protecting device, wherein the output end of the double power supply automatic switching protector is connected with a data integrated circuit; the winding temperature monitor, the in-box temperature and humidity controller and the cooler driving and protecting device are all connected with the data integrated circuit; the data integrated circuit is connected with a transformer temperature remote monitor through an oil surface temperature controller which is used for detecting, displaying and transmitting the temperature on the oil surface; and the output end of the oil surface temperature controller is connected with the cooler driving and protecting device. The temperature intelligent monitoring system adopts reasonable design, has complete functions, high control precision, high intellectualization degree and high working reliability, can be used flexibly and conveniently with good use effect and is convenient to promote and use.
Description
Technical field
The utility model belongs to transformer monitoring temperature technical field, especially relates to a kind of digitizing transformer temperature intelligent supervisory system.
Background technology
Medium-and-large-sized power transformer majority is placed in the field, and damp and hot, cold bad border all can impact and threaten performance, reliability and the life-span of transformer temperature controller.The present power transformer temperature control device that uses, generally transformer pasta temperature controller of being made respectively by two different manufacturers and refrigeratory or blower fan control box are synthetic in transformer station's assembling, the monitoring of transformer temperature be can realize substantially, but following defective and deficiency also existed:
1, " transformer " magazine o. 11th in 2010 is the 34th page " " point out in the literary composition: " 110KV and above transforming plant main transformer depressor operation result show; transformer body temperature meter shows that numerical value and pulpit main transformer temperature show numerical error big (the error maximum reaches 7 ℃～8 ℃; great majority all reach about 5 ℃), exists thermometer indication misalignment and distant place numeral Wen Xianyi or the computer monitoring problem of monitor temperature in real time " by problem that the transformer body temperature exists in measuring and solution.The expert is arranged in conjunction with on-site actual situations, proposed to adopt comprehensive adjustment method to carry out the method for the whole maintenance of transformer body temperature measuring system verification, solved the bigger problem of error.But concerning general field maintemance is repaired, the method for whole maintenance verification, technical acquiring a certain degree of difficulty needs professional and instrument, and be more loaded down with trivial details.
2, point out in 2010 the 2nd phases of " transformer " magazine the 34th～36 page of " improvement of forced oil-circulation air cooled transformer Cooler Power switching controls loop " literary composition: " find in the actual motion maintenance process; still there are a lot of defectives in the design of refrigeratory control loop; because transformer cooling device power supply switching circuit fault is of common occurrence in the accident that electric system causes: for example 220KV flies that working power (I section) ac contactor coil burns in the Fengshan transformer station No. 1 main transformer refrigeratory overhead control case; can not automatically switch to power supply (II section), cause main transformer tripping operation accident.Owing to for a long time by load current, can cause the contact heating during operation of contactor main contact, make the oxidation aggravation, even burn, cause phase-deficient operation.And can not automatically switch to 380V II section power work, may cause the main transformer quencher moiety to burn out even all burn out, cause main transformer to be forced to the stoppage in transit accident.”
3, the pulpit only has remote temperature to show, can not in time understand the ruuning situation at transformer temperature control scene.For example the bearing of Zhuan Donging increases because of the gap or the mill an ancient egg-shaped, holed wind instrument makes when loading overload, and refrigeratory rotates when being obstructed because of stifled, card make, and generic failure is in initial state; the scene also is difficult for finding that the pulpit does not have any signal, not protection in time; fault is enlarged, cause badly damaged, so that temperature control or fault.
The utility model content
Technical problem to be solved in the utility model is at above-mentioned deficiency of the prior art, and a kind of digitizing transformer temperature intelligent supervisory system is provided, and it is reasonable in design, complete function, control accuracy height, intelligent degree height, the functional reliability height, flexible and convenient to use, be convenient to promote the use of.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of digitizing transformer temperature intelligent supervisory system, it is characterized in that: comprise that the dual power supply that is used for transformer station is offered this digitizing transformer temperature intelligent supervisory system detects, the dual power supply automatic switching protection device that switches and protect, be used to gather environment temperature, pasta temperature and load current also calculate winding temperature and show the winding temperature monitor of winding temperature in conjunction with input parameter, be used for humiture in the vasculum and to humiture in the case control and the case that shows in temperature and humidity controller, and be used to drive and protect the refrigeratory of refrigeratory to drive and protector; The output termination of described dual power supply automatic switching protection device to signal put in order, standard and comprehensive data acquisition circuit; driving of temperature and humidity controller and refrigeratory and protector all join with the data acquisition circuit in described winding temperature monitor, the case; described data acquisition circuit joins by pasta temperature controller and the transformer temperature remote monitor that is used for the pasta temperature is detected, shows and transmits, and the output termination refrigeratory of described pasta temperature controller drives and protector.
Above-mentioned digitizing transformer temperature intelligent supervisory system is characterized in that: described pasta temperature controller is connected by RS485 bus, optical fiber or wireless communication system with transformer temperature remote monitor and communicates by letter.
Above-mentioned digitizing transformer temperature intelligent supervisory system; it is characterized in that: described dual power supply automatic switching protection device comprises the mu balanced circuit one that joins with external power source one; mu balanced circuit two that joins with external power source two and the internal electric source testing circuit that joins with internal electric source; described external power source one joins by contactor one and internal electric source; described external power source two joins by contactor two and internal electric source; described mu balanced circuit one; mu balanced circuit two and internal electric source testing circuit all join with controller one; described controller one is gathered mu balanced circuit one; the signal that mu balanced circuit two and internal electric source testing circuit are exported is also handled back output control signal corresponding by analysis and is given contactor drive circuit one and the contactor drive circuit two that joins with it; described contactor drive circuit one joins with contactor one and the energising and the outage of control contactor one; described contactor drive circuit two joins with contactor two and the energising and the outage of control contactor two; the input end of described controller one also is connected to the contactor failure detector circuit one that joins with contactor one and the coil fault of contactor one is detected; the input end of described controller one also is connected to the contactor failure detector circuit two that joins with contactor two and the coil fault of contactor two is detected, and described controller one is by being connected on output external power source one phase shortage of its output terminal; external power source two phase shortages; the coil fault of contactor one; the fault-signal output circuit and the data acquisition circuit of contactor two coil fault and five kinds of fault-signals of internal electric source fault join.
Above-mentioned digitizing transformer temperature intelligent supervisory system, it is characterized in that: described winding temperature monitor comprises three current transformers that are used to detect the transformer load electric current, the signal time-sharing multiplex circuit one that joins with three current transformers, the ac-dc converter circuit one that joins with signal time-sharing multiplex circuit one, and the amplifying circuit one that joins with ac-dc converter circuit one, described signal time-sharing multiplex circuit one and amplifying circuit one all join with controller two, the input end of described controller two also is connected to the digital temperature sensor two that is used for the digital temperature sensor one that environment temperature is detected and is used for the pasta temperature is detected, described controller two is gathered digital temperature sensor one, the signal that digital temperature sensor two and three current transformers are exported is also handled back output control signal corresponding by analysis and is given the LED display circuit one that winding temperature is shown of being used for that is connected on its output terminal, and the output terminal of described controller two and data acquisition circuit join and pass through I with the data acquisition circuit
2The C communication mode communicates.
Above-mentioned digitizing transformer temperature intelligent supervisory system is characterized in that: in the described case temperature and humidity controller comprise the digital hygro sensor that is used for humiture in the case is detected, the controller three that joins with digital hygro sensor and join with controller three and pass through I
2The controller four that the C communication mode communicates, the input end of described controller four is connected to three toggle switchs one that are used for the selected temperature controlled variable and three toggle switchs two that are used for selected humidity controlled variable, the output terminal of described controller four is connected to and is used for LED display circuit two that the temperature inside the box and humidity are shown, described controller four-way is crossed the work that photoelectric isolating circuit one joins with exhaust fan and controls exhaust fan, described controller four-way is crossed the work that photoelectric isolating circuit two joins with dehumidifier and controls dehumidifier, and described controller four-way is crossed photoelectric isolating circuit three and joined with the data acquisition circuit.
Above-mentioned digitizing transformer temperature intelligent supervisory system; it is characterized in that: described refrigeratory drives and protector comprises a plurality of identical drivings and holding circuit module; each described driving and holding circuit module comprise three current transformers of the motor three-phase current that is used to gather refrigeratory; the signal time-sharing multiplex circuit two that joins with three current transformers; the ac-dc converter circuit two that joins with signal time-sharing multiplex circuit two; the amplifying circuit two that joins with ac-dc converter circuit two; described signal time-sharing multiplex circuit two and amplifying circuit two all join with controller five; the input end of described controller five also is connected to three toggle switchs three of the rated power that is used for selected refrigeratory; the output terminal of the input termination pasta temperature controller of described controller five; described controller five-way is crossed the work that the photoelectric isolating circuit four that joins successively and three-phase thyristor driving circuit and motor join and control motor; the signal that described controller five collection amplifying circuits two are exported is also handled back output startup overcurrent by analysis; start phase shortage; the operation overload; operation phase shortage and five kinds of fault-signals of fault are given the controller six that is connected on its output terminal; the input end of described controller six is connected to and is used to import that this road refrigeratory drives and five toggle switchs of the sequence numbering of protector, and described controller six is crossed photoelectric isolating circuits five and joined with the data acquisition circuit and communicate.
Above-mentioned digitizing transformer temperature intelligent supervisory system, it is characterized in that: described data acquisition circuit comprises controller seven, described controller seven joins with winding temperature monitor and pasta temperature controller respectively and passes through I
2The C communication mode communicates, and described controller seven joins by temperature and humidity controller in photoelectric isolating circuit six and refrigeratory driving and protector and the case and carries out serial communication with master-slave mode.
Above-mentioned digitizing transformer temperature intelligent supervisory system; it is characterized in that: described pasta temperature controller comprises and is used for digital temperature sensor three that the pasta temperature is detected; controller eight that joins with digital temperature sensor three and the data storage circuitry one that joins with controller eight; the signal that described controller eight collection digital temperature sensors three are exported is also handled back output control signal corresponding by analysis to the LED display circuit three that is used to show the pasta temperature that is connected on its output terminal; be used in reference to the temperature control shelves pilot lamp and the malfunction indicator lamp that is used to indicate refrigeratory and digital temperature sensor three to break down of temperature indicating control shelves; the output terminal of described controller eight also is connected to superhigh temperature power-off protecting circuit and the decoding output circuit that is used for to refrigeratory driving and protector output switching signal; described controller eight is by RS485 telecommunication circuit one; optical fiber communication circuit one or radio communication circuit one join with transformer temperature remote monitor and communicate, and the output terminal of described controller eight and data acquisition circuit join and pass through I with the data acquisition circuit
2The C communication mode communicates.
Above-mentioned digitizing transformer temperature intelligent supervisory system, it is characterized in that: described temperature control shelves pilot lamp comprises that temperature control shelves pilot lamp one, temperature that temperature reaches A shelves temperature reach the temperature control shelves pilot lamp two of B shelves temperature and the temperature control shelves pilot lamp three that temperature reaches C shelves temperature, 10 ℃＜A＜55 ℃ wherein, A+5 ℃＜B＜70 ℃, B+5 ℃＜C＜80 ℃; Described malfunction indicator lamp comprises and is used to indicate the malfunction indicator lamp one that refrigeratory breaks down and is used for the malfunction indicator lamp two that designation number temperature sensor three breaks down.
Above-mentioned digitizing transformer temperature intelligent supervisory system, it is characterized in that: described transformer temperature remote monitor comprises controller nine and the data storage circuitry two that joins with controller nine, the input end of described controller nine is connected to and is used for parameter setting circuit that systematic parameter is provided with, described controller nine is by RS485 telecommunication circuit two, optical fiber communication circuit two or radio communication circuit two join with the pasta temperature controller and communicate, the output terminal of described controller nine is connected to and is used to report the voice broadcast circuit of fault-signal and is used to show the pasta temperature, the LED display circuit four of setup parameter and fault status information and be used for the output port of controller nine expanded to 32 decoder circuit, the output terminal of described controller nine and the output terminal of decoder circuit all join with 32 three-colour light-emitting pipe circuit, the output terminal of described controller nine also be connected to controller nine with I
2The controller ten that the C communication mode communicates, the input end of described controller ten is connected to the 4-bit DIP switch of this digitizing transformer temperature intelligent supervisory system of input numbering, the output terminal of described controller ten be connected to be used to comprehensive automation system of transformer substation provide digital signal telecommunication circuit, be used to comprehensive automation system of transformer substation that the D/A change-over circuit of simulating signal is provided and be used to show winding temperature and case in the LED display circuit five of humiture.
The utility model compared with prior art has the following advantages:
1, external power in the touring all the time detection of the controller one in the utility model dual power supply automatic switching protection device, when the adhesive of contactor contact is undesired, when arbitrary phase-to-ground voltage is greater than 280V or less than 160V in the three-phase supply, in time control contactor switches, when making work in contactor one and the contactor two, another is in off-position; Simultaneously output services state and failure modes information are gathered by the data acquisition circuit, can not delay power supply control less than closed-loop control cycle of 0.1 second; With single-chip microcomputer and corresponding electronic circuit contactor is carried out protection, power supply reliability is guaranteed, the startup that has also effectively reduced contactor simultaneously impacts, protected contactor, prolonged serviceable life of contactor; Short circuit, overcurrent, phase shortage time are reduced the influence that circuit and device cause as far as possible.
2, winding temperature monitor of the present utility model shows winding temperature so that in time adjust load by LED display circuit one, prevents the influence of excessive temperature to insulation ag(e)ing in the transformer.Temperature and humidity controller is selected the digital hygro sensor of SHT10-75 series for use in the case, and the accuracy of detection height control flexiblely, and effectively the interior humiture of control box is improved the system works environment in certain limit.
3, refrigeratory driving of the present utility model and protector can satisfy the use that is less than No. 32 refrigeratorys; can select the refrigeratory that drives 8 kinds of different capacities; comprise and start operation overall process protection and fault alarm automatically; single-chip microcomputer is with touring the detection and closed-loop control of the cycle of＜0.1S; tracing trouble just can in time be implemented power-off protection when initial state, changing traditional trouble hunting is repair based on condition of component.
4, pasta temperature temperature controller of the present utility model is selected two digital temperature sensors for use, one detection one is standby, automatically change backup sensors as fault, it is good not only to detect real-time, and accuracy of detection height, temperature measurement error and exchange error be not more than ± 0.5 ℃, data signal transmission is not subjected to the high-voltage fence and the transformer interference of electromagnetic field in the us frequency range; Replace traditional electrical configuration with single-chip microcomputer in the pasta temperature controller, overcome inherent shortcoming, thoroughly eliminated gauge tap action error and other transformed error, transformer body temperature and pulpit Temperature numerical display error are eliminated fully; Control accuracy is up to 0.1 ℃, and control action is reliable, accurate; Can also realize protection by superhigh temperature power-off protecting circuit output contact during maximum temperature value that surpass to set for three times when the transformer temperature is continuous to transformer.
5, the transformer temperature remote monitor in the utility model can be by being presented at humiture and working state of system and failure message in data monitoring transformer oil surface temperature on LED display circuit four and the LED display circuit five, winding temperature, the case, and can classify shows the malfunction of dual power supply and refrigeratory; Can set controlled variable by the parameter setting circuit, can carry out combination in any, specify in the operational parameter control of the temperature shelves of setting arbitrarily refrigeratory, make system works in automatic control state, each pre-set parameter of system has reasonable qualification, can not make mistakes, and is simple to operate; The corresponding three-colour light-emitting pipe of each road refrigeratory, dividing the temperature control shelves of three kinds of color showing operations is A shelves, B shelves or C shelves; The on-the-spot feedback information of transformer temperature remote monitor is complete, intuitive display, be easy to distinguish, and is provided with the voice broadcast circuit that is used to report fault-signal, is convenient to the staff and in time finds fault and investigation.
6, the utility model is selected digital integrated device for use, integral structure, make the box weight and the volume of stainless steel cabinet significantly reduce, the extensibility of system is good, when there is two or more this digitizing transformer temperature intelligent supervisory system in transformer station, can simple syndication, or with an industrial computer and many these systems that the communication numbering is arranged by the master-slave mode communication, set up the runtime database integrated management.Integrated automation of transformation stations new equipment connects this digitizing transformer temperature intelligent supervisory system with digital signal (for example RS485 bus), used equipment also voltage available, current signal connects this digitizing transformer temperature intelligent supervisory system, can also and electrical parameters detection etc. all transformer controls merge into unified rack; The native system use that can also break; or reconfigure purposes is also arranged; can be used for other equipment separately as dual power supply automatic switching protection device, the temperature inside the box humidity controller etc., pasta temperature controller and the combination of transformer temperature remote monitor can be used for transformer or other temperature detection.
In sum, the utility model is reasonable in design, complete function, control accuracy height, intelligent degree height, the functional reliability height, flexible and convenient to use, solved defective that the existing in prior technology functional reliability is low, control accuracy is low and deficiency, result of use is good, is convenient to promote the use of.
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
Description of drawings
Fig. 1 is a circuit block diagram of the present utility model.
Fig. 2 is the circuit block diagram of the utility model dual power supply automatic switching protection device.
Fig. 3 is the circuit block diagram of the utility model winding temperature monitor.
Fig. 4 is the circuit block diagram of temperature and humidity controller in the utility model case.
Fig. 5 is the circuit block diagram of driving of the utility model refrigeratory and protector.
Fig. 6 is the circuit block diagram of the utility model data acquisition circuit.
Fig. 7 is the circuit block diagram of the utility model pasta temperature controller.
Fig. 8 is the circuit block diagram of the utility model transformer temperature remote monitor.
Description of reference numerals:
The 1-dual power supply automaticallyes switch and protects 1-1-external power source one; 1-2-external power source two;
Protect device;
1-3-contactor one; 1-4-contactor two; The 1-5-internal electric source;
1-6-mu balanced circuit one; 1-7-contactor drive circuit 1-8-mu balanced circuit two;
One;
1-9-contactor drive circuit 1-10-internal electric source detects electric 1-11-controller one;
Two; The road;
The output of 1-12-contactor fault detect 1-13-contactor fault detect 1-14-fault-signal
Circuit one; Circuit two; The road;
2-winding temperature monitor; 2-101-current transformer one; 2-102-current transformer two;
2-103-current transformer three; 2-2-signal time-sharing multiplex electricity 2-3-ac-dc converter circuit
Road one; One;
2-4-amplifying circuit one; 2-5-controller two; The 2-6-digital temperature sensor
One;
2-7-digital temperature sensor 2-8-LED display circuit one; Temperature and humidity controller in the 3-case;
Two;
3-1-numeral temperature and humidity sensing 3-2-controller three; 3-3-controller four;
Device;
Three toggle switch 3-5-LED of three toggle switch 3-42-of 3-41-display circuit two;
One; Two;
3-6-photoelectric isolating circuit one; 3-7-photoelectric isolating circuit two; 3-8-photoelectric isolating circuit three;
The 4-refrigeratory drives and protection 4-101-current transformer four; 4-102-current transformer five;
Device;
4-103-current transformer six; 4-2-signal time-sharing multiplex electricity 4-3-ac-dc converter circuit
Road two; Two;
4-4-amplifying circuit two; 4-5-controller five; Three toggle switchs three of 4-6-;
4-7-photoelectric isolating circuit four; The 4-8-three-phase thyristor drives the 4-9-motor;
Circuit;
4-10-controller six; Five toggle switchs of 4-11-; The 4-12-photoelectric isolating circuit
Five;
5-data acquisition circuit; 5-1-controller seven; 5-2-photoelectric isolating circuit six;
6-pasta temperature controller; 6-1-digital temperature sensor 6-2-controller eight;
Three;
6-3-data storage circuitry one; 6-4-LED display circuit three; 6-5-temperature control shelves pilot lamp;
The 6-6-malfunction indicator lamp; 6-7-superhigh temperature power-off protection 6-8-decoding output circuit;
Circuit;
6-9-RS485 telecommunication circuit 6-10-optical fiber communication circuit 6-11-radio communication circuit
One; One; One;
The long-range prison 7-1-of 7-transformer temperature controller nine; 7-2-data storage circuitry two;
The control device;
7-3-parameter setting circuit; 7-4-RS485 telecommunication circuit 7-5-optical fiber communication circuit two;
Two;
7-6-voice broadcast circuit; 7-7-LED display circuit four; The 7-8-decoder circuit;
7-9-32 position three-colour light-emitting pipe 7-10-controller ten; The 7-11-4-bit DIP switch;
Circuit;
The 7-12-telecommunication circuit; The 7-13-D/A change-over circuit; 7-14-LED display circuit five;
The 7-15-radio communication circuit
Two.
Embodiment
As shown in Figure 1, the utility model comprises and is used for transformer station is offered the dual power supply automatic switching protection device 1 that the dual power supply of this digitizing transformer temperature intelligent supervisory system detects, switches and protects, the winding temperature monitor 2 that is used to gather environment temperature, pasta temperature and load current and calculates winding temperature and demonstration winding temperature in conjunction with input parameter, be used for humiture in the vasculum and to humiture in the case control and the case that shows in temperature and humidity controller 3, and be used to drive and protect the refrigeratory of refrigeratory to drive and protector 4; The output termination of described dual power supply automatic switching protection device 1 to signal put in order, standard and comprehensive data acquisition circuit 5; driving of temperature and humidity controller 3 and refrigeratory and protector 4 all join with data acquisition circuit 5 in described winding temperature monitor 2, the case; described data acquisition circuit 5 joins with transformer temperature remote monitor 7 by the pasta temperature controller 6 that is used for the pasta temperature is detected, shows and transmits, and the output termination refrigeratory of described pasta temperature controller 6 drives and protector 4.
In the present embodiment, described pasta temperature controller 6 is connected by RS485 bus, optical fiber or wireless communication system with transformer temperature remote monitor 7 and communicates by letter.
In conjunction with Fig. 2; in the present embodiment; described dual power supply automatic switching protection device 1 comprises mu balanced circuit one 1-6 that joins with external power source one 1-1; mu balanced circuit two 1-8 that join with external power source two 1-2 and the internal electric source testing circuit 1-10 that joins with internal electric source 1-5; described external power source one 1-1 joins by contactor one 1-3 and internal electric source 1-5; described external power source two 1-2 join by contactor two 1-4 and internal electric source 1-5; described mu balanced circuit one 1-6; mu balanced circuit two 1-8 and internal electric source testing circuit 1-10 all join with controller one 1-11; described controller one 1-11 gathers mu balanced circuit one 1-6; the signal that mu balanced circuit two 1-8 and internal electric source testing circuit 1-10 are exported is also handled back output control signal corresponding by analysis and is given contactor drive circuit one 1-7 and contactor drive circuit two 1-9 that join with it; described contactor drive circuit one 1-7 and contactor one 1-3 join and energising and the outage of control contactor one 1-3; described contactor drive circuit two 1-9 and contactor two 1-4 join and energising and the outage of control contactor two 1-4; the input end of described controller one 1-11 also is connected to contactor failure detector circuit one 1-12 that joins with contactor one 1-3 and the coil fault of contactor one 1-3 is detected; the input end of described controller one 1-11 also is connected to contactor failure detector circuit two 1-13 that join with contactor two 1-4 and the coil fault of contactor two 1-4 is detected, and described controller one 1-11 is by being connected on output external power source one phase shortage of its output terminal; external power source two phase shortages; the coil fault of contactor one; the fault-signal output circuit 1-14 and the data acquisition circuit 5 of contactor two coil fault and five kinds of fault-signals of internal electric source fault join.Wherein, controller one 1-11 selects single-chip microcomputer PIC16F84A for use.
In conjunction with Fig. 3, in the present embodiment, described winding temperature monitor 2 comprises three current transformers that are used to detect the transformer load electric current, signal time-sharing multiplex circuit one 2-2 that joins with three current transformers, ac-dc converter circuit one 2-3 that joins with signal time-sharing multiplex circuit one 2-2, and amplifying circuit one 2-4 that joins with ac-dc converter circuit one 2-3, described signal time-sharing multiplex circuit one 2-2 and amplifying circuit one 2-4 all join with controller two 2-5, the input end of described controller two 2-5 also is connected to digital temperature sensor two 2-7 that are used for digital temperature sensor one 2-6 that environment temperature is detected and are used for the pasta temperature is detected, described controller two 2-5 gather digital temperature sensor one 2-6, the signal that digital temperature sensor two 2-7 and three current transformers are exported is also handled back output control signal corresponding by analysis and is given LED display circuit one 2-8 that winding temperature is shown of being used for that is connected on its output terminal, and the output terminal of described controller two 2-5 and data acquisition circuit 5 join and pass through I with data acquisition circuit 5
2The C communication mode communicates.Wherein, described three current transformers specifically are current transformer one 2-101, current transformer two 2-102 summation current transformers three 2-103; Described controller two 2-5 select single-chip microcomputer PIC16F676 for use.
In conjunction with Fig. 4, in the present embodiment, in the described case temperature and humidity controller 3 comprise the digital hygro sensor 3-1 that is used for humiture in the case is detected, controller three 3-2 that join with digital hygro sensor 3-1 and join with controller three 3-2 and pass through I
2Controller four 3-3 that the C communication mode communicates, the input end of described controller four 3-3 is connected to three toggle switch one 3-41 that are used for the selected temperature controlled variable and three toggle switch two 3-42 that are used for selected humidity controlled variable, the output terminal of described controller four 3-3 is connected to and is used for LED display circuit two 3-5 that the temperature inside the box and humidity are shown, described controller four 3-3 join by photoelectric isolating circuit one 3-6 and exhaust fan and control the work of exhaust fan, described controller four 3-3 join by photoelectric isolating circuit two 3-7 and dehumidifier and control the work of dehumidifier, and described controller four 3-3 join by photoelectric isolating circuit three 3-8 and data acquisition circuit 5.Wherein, digital hygro sensor 3-1 selects digital hygro sensor SHT10-75 for use, accuracy of detection: temperature ± 0.5 ℃, humidity ± 2.0-4.5%RH, can select 8 kinds of numerical value and carry out control, effectively the humiture in the control box is improved the system works environment in certain limit; Controller three 3-2 select single-chip microcomputer PIC16F676 for use, and controller four 3-3 select single-chip microcomputer 89S52 for use; The winding temperature value can be on the basis of testing environment temperature, pasta temperature and load current, and rule of thumb parameter and hot(test)-spot temperature accounting equation draw and are presented on the LED display circuit one, are convenient in time adjust transformer load.
In conjunction with Fig. 5; in the present embodiment; described refrigeratory drives and protector 4 comprises a plurality of identical drivings and holding circuit module; each described driving and holding circuit module comprise three current transformers of the motor 4-9 three-phase current that is used to gather refrigeratory; signal time-sharing multiplex circuit two 4-2 that join with three current transformers; ac-dc converter circuit two 4-3 that join with signal time-sharing multiplex circuit two 4-2; amplifying circuit two 4-4 that join with ac-dc converter circuit two 4-3; described signal time-sharing multiplex circuit two 4-2 and amplifying circuit two 4-4 all join with controller five 4-5; the input end of described controller five 4-5 also is connected to three toggle switch three 4-6 of the rated power that is used for selected refrigeratory; the output terminal of the input termination pasta temperature controller 6 of described controller five 4-5; described controller five 4-5 join by photoelectric isolating circuit four 4-7 that join successively and three-phase thyristor driving circuit 4-8 and motor 4-9 and control the work of motor 4-9; the signal that described controller five 4-5 collection amplifying circuit two 4-4 are exported is also handled back output startup overcurrent by analysis; start phase shortage; the operation overload; operation phase shortage and five kinds of fault-signals of fault are given controller six 4-10 that are connected on its output terminal; the input end of described controller six 4-10 is connected to and is used to import that this road refrigeratory drives and five toggle switch 4-11 of the sequence numbering of protector 4, and described controller six 4-9 join by photoelectric isolating circuit five 4-12 and data acquisition circuit 5 and communicate.Wherein, described refrigeratory drives and protector 4 comprises 32 identical drivings and holding circuit module, and described three current transformers specifically are the identical current transformer of parameter four 4-101, current transformer five 4-102 summation current transformers six 4-103; Controller five 4-5 select single-chip microcomputer P I C16F 676 for use, and controller six 4-9 select single-chip microcomputer 97C2051 for use.
In conjunction with Fig. 6, in the present embodiment, described data acquisition circuit 5 comprises controller seven 5-1, and described controller seven 5-1 join with winding temperature monitor 2 and pasta temperature controller 6 respectively and pass through I
2The C communication mode communicates, and described controller seven 5-1 join by temperature and humidity controller 3 in photoelectric isolating circuit six 5-2 and refrigeratory driving and protector 4 and the case and carry out serial communication with master-slave mode.Wherein, controller seven 5-1 select single-chip microcomputer 89S52 for use.
In conjunction with Fig. 7; in the present embodiment; described pasta temperature controller 6 comprises and is used for digital temperature sensor three 6-1 that the pasta temperature is detected; controller eight 6-2 that join with digital temperature sensor three 6-1 and data storage circuitry one 6-3 that joins with controller eight 6-2; the signal that described controller eight 6-2 collection digital temperature sensor three 6-1 are exported is also handled back output control signal corresponding by analysis to LED display circuit three 6-4 that are used to show the pasta temperature that are connected on its output terminal; be used in reference to the temperature control shelves pilot lamp 6-5 and the malfunction indicator lamp 6-6 that is used to indicate refrigeratory and digital temperature sensor three 6-1 to break down of temperature indicating control shelves; the output terminal of described controller eight 6-2 also is connected to superhigh temperature power-off protecting circuit 6-7 and the decoding output circuit 6-8 that is used for to refrigeratory driving and protector 4 output switching signals; described controller eight 6-2 are by RS 485 telecommunication circuits one 6-9; optical fiber communication circuit one 6-10 or radio communication circuit one 6-11 and transformer temperature remote monitor 7 join and communicate, and the output terminal of described controller eight 6-2 and data acquisition circuit 5 join and pass through I with data acquisition circuit 5
2The C communication mode communicates.
Particularly, in the present embodiment, described digital temperature sensor three 6-1 are two, and one is used for detecting, and another is standby, guarantees the reliability of system works.Described temperature control shelves pilot lamp 6-5 comprises that temperature control shelves pilot lamp one, temperature that temperature reaches A shelves temperature reach the temperature control shelves pilot lamp two of B shelves temperature and the temperature control shelves pilot lamp three that temperature reaches C shelves temperature, 10 ℃＜A＜55 ℃ wherein, A+5 ℃＜B＜70 ℃, B+5 ℃＜C＜80 ℃; Described malfunction indicator lamp 6-6 comprises and is used to indicate the malfunction indicator lamp one that refrigeratory breaks down and is used for the malfunction indicator lamp two that designation number temperature sensor three 6-1 break down.
In conjunction with Fig. 8, in the present embodiment, described transformer temperature remote monitor 7 comprises controller nine 7-1 and data storage circuitry two 7-2 that join with controller nine 7-1, the input end of described controller nine 7-1 is connected to and is used for parameter setting circuit 7-3 that systematic parameter is provided with, described controller nine 7-1 are by RS485 telecommunication circuit two 7-4, optical fiber communication circuit two 7-5 or radio communication circuit two 7-15 and pasta temperature controller 6 join and communicate, the output terminal of described controller nine 7-1 is connected to and is used to report the voice broadcast circuit 7-6 of fault-signal and is used to show the pasta temperature, LED display circuit four 7-7 of setup parameter and fault status information and be used for the output port of controller nine 7-1 expanded to 32 decoder circuit 7-8, the output terminal of described controller nine 7-1 and the output terminal of decoder circuit 7-8 all join with 32 three-colour light-emitting pipe circuit 7-9, the output terminal of described controller nine 7-1 also be connected to controller nine 7-1 with I
2Controller ten 7-10 that the C communication mode communicates, the input end of described controller ten 7-10 is connected to the 4-bit DIP switch 7-11 of this digitizing transformer temperature intelligent supervisory system of input numbering, the output terminal of described controller ten 7-1 be connected to be used to comprehensive automation system of transformer substation provide digital signal telecommunication circuit 7-12, be used to comprehensive automation system of transformer substation that the D/A change-over circuit 7-13 of simulating signal is provided and be used to show winding temperature and case in LED display circuit five 7-14 of humiture.Wherein, controller nine 7-1 select single-chip microcomputer 89S52 for use, and controller ten 7-10 select single-chip microcomputer 97C2051 for use.
During concrete the installation, described transformer temperature remote monitor 7 is installed on the transformer cabinet panel of pulpit; Described dual power supply automatic switching protection device 1; winding temperature monitor 2; temperature and humidity controller 3 in the case; refrigeratory driving and protector 4 and pasta temperature controller 6 are installed in respectively in five aluminium compartment; described data acquisition circuit 5 is installed in the same aluminium compartment with winding temperature monitor 2; the aggregate erection of five described aluminium compartment is in a stainless steel cabinet; connecting line between each aluminium compartment is placed in the trough of special setting; described LED display circuit one 2-8; LED display circuit two 3-5 and LED display circuit three 6-4; and three toggle switch one 3-41; three toggle switch two 3-42 and three toggle switch three 4-6 all are installed on the panel of stainless steel cabinet by eight grades of rotary switches; stainless steel glass window on the stainless steel cabinet cover plate satisfies display requirement, and the stainless steel cabinet is installed in the side of transformer.The pasta temperature controller 6 of long distance is connected with transformer temperature remote monitor 7 usefulness RS485 buses or multimode optical fiber; data acquisition circuit 5 is gathered the information of dual power supply automatic switchover and protector; pasta temperature controller 6 directly sends each road control signal to refrigeratory and drives and protector 4; data acquisition circuit 5 drive with refrigeratory and protector 4 and case in temperature and humidity controller 3 communicate with master-slave mode, winding temperature monitor 2 and pasta temperature controller 6 are taked I with data acquisition circuit 5
2The C communication mode.
During use, in western highlands, the Humidity Detection in the case in the temperature and humidity controller 3 can be omitted; Normal all the time local at power supply, dual power supply automatic switching protection device 1 can omit; What many transformers were arranged can be combined as unified rack, also can expand a plurality of controllers in addition again and be used to gather electrical parameters such as transformer voltage, electric current, power harmonic wave and frequency and control performers such as disconnector, interconnection switch, breaker closing and tripping operation, form Full Featured intelligent transformer supervisory system.
The above; it only is preferred embodiment of the present utility model; be not that the utility model is imposed any restrictions; everyly any simple modification that above embodiment did, change and equivalent structure are changed, all still belong in the protection domain of technical solutions of the utility model according to the utility model technical spirit.
Claims (10)
1. digitizing transformer temperature intelligent supervisory system, it is characterized in that: comprise that the dual power supply that is used for transformer station is offered this digitizing transformer temperature intelligent supervisory system detects, the dual power supply automatic switching protection device (1) that switches and protect, be used to gather environment temperature, pasta temperature and load current also calculate winding temperature and show the winding temperature monitor (2) of winding temperature in conjunction with input parameter, be used for humiture in the vasculum and to humiture in the case control and the case that shows in temperature and humidity controller (3), and be used to drive and protect the refrigeratory of refrigeratory to drive and protector (4); The output termination of described dual power supply automatic switching protection device (1) to signal put in order, standard and comprehensive data acquisition circuit (5); driving of temperature and humidity controller (3) and refrigeratory and protector (4) all join with data acquisition circuit (5) in described winding temperature monitor (2), the case; described data acquisition circuit (5) joins with transformer temperature remote monitor (7) by the pasta temperature controller (6) that is used for the pasta temperature is detected, shows and transmits, and the output termination refrigeratory of described pasta temperature controller (6) drives and protector (4).
2. according to the described digitizing transformer of claim 1 temperature intelligent supervisory system, it is characterized in that: described pasta temperature controller (6) is connected by RS485 bus, optical fiber or wireless communication system with transformer temperature remote monitor (7) and communicates by letter.
3. according to claim 1 or 2 described digitizing transformer temperature intelligent supervisory systems; it is characterized in that: described dual power supply automatic switching protection device (1) comprises the mu balanced circuit one (1-6) that joins with external power source one (1-1); mu balanced circuit two (1-8) that joins with external power source two (1-2) and the internal electric source testing circuit (1-10) that joins with internal electric source (1-5); described external power source one (1-1) joins by contactor one (1-3) and internal electric source (1-5); described external power source two (1-2) joins by contactor two (1-4) and internal electric source (1-5); described mu balanced circuit one (1-6); mu balanced circuit two (1-8) and internal electric source testing circuit (1-10) all join with controller one (1-11); described controller one (1-11) is gathered mu balanced circuit one (1-6); the signal that mu balanced circuit two (1-8) and internal electric source testing circuit (1-10) are exported is also handled back output control signal corresponding by analysis and is given contactor drive circuit one (1-7) and the contactor drive circuit two (1-9) that joins with it; described contactor drive circuit one (1-7) and contactor one (1-3) join and the energising and the outage of control contactor one (1-3); described contactor drive circuit two (1-9) and contactor two (1-4) join and the energising and the outage of control contactor two (1-4); the input end of described controller one (1-11) also is connected to the contactor failure detector circuit one (1-12) that joins with contactor one (1-3) and the coil fault of contactor one (1-3) is detected; the input end of described controller one (1-11) also is connected to the contactor failure detector circuit two (1-13) that joins with contactor two (1-4) and the coil fault of contactor two (1-4) is detected, and described controller one (1-11) is by being connected on output external power source one phase shortage of its output terminal; external power source two phase shortages; the coil fault of contactor one; the fault-signal output circuit (1-14) of contactor two coil fault and five kinds of fault-signals of internal electric source fault joins with data acquisition circuit (5).
4. according to claim 1 or 2 described digitizing transformer temperature intelligent supervisory systems, it is characterized in that: described winding temperature monitor (2) comprises three current transformers that are used to detect the transformer load electric current, the signal time-sharing multiplex circuit one (2-2) that joins with three current transformers, the ac-dc converter circuit one (2-3) that joins with signal time-sharing multiplex circuit one (2-2), and the amplifying circuit one (2-4) that joins with ac-dc converter circuit one (2-3), described signal time-sharing multiplex circuit one (2-2) and amplifying circuit one (2-4) all join with controller two (2-5), the input end of described controller two (2-5) also is connected to the digital temperature sensor two (2-7) that is used for the digital temperature sensor one (2-6) that environment temperature is detected and is used for the pasta temperature is detected, described controller two (2-5) is gathered digital temperature sensor one (2-6), the signal that digital temperature sensor two (2-7) and three current transformers are exported is also handled back output control signal corresponding by analysis and is given the LED display circuit one (2-8) that winding temperature is shown of being used for that is connected on its output terminal, and the output terminal of described controller two (2-5) and data acquisition circuit (5) join and pass through I with data acquisition circuit (5)
2The C communication mode communicates.
5. according to claim 1 or 2 described digitizing transformer temperature intelligent supervisory systems, it is characterized in that: in the described case temperature and humidity controller (3) comprise the digital hygro sensor (3-1) that is used for humiture in the case is detected, the controller three (3-2) that joins with digital hygro sensor (3-1) and join with controller three (3-2) and pass through I
2The controller four (3-3) that the C communication mode communicates, the input end of described controller four (3-3) is connected to three toggle switchs one (3-41) that are used for the selected temperature controlled variable and is used for three toggle switchs two (3-42) of selected humidity controlled variable, the output terminal of described controller four (3-3) is connected to and is used for LED display circuit two (3-5) that the temperature inside the box and humidity are shown, described controller four (3-3) joins by photoelectric isolating circuit one (3-6) and exhaust fan and controls the work of exhaust fan, described controller four (3-3) joins by photoelectric isolating circuit two (3-7) and dehumidifier and control the work of dehumidifier, and described controller four (3-3) joins by photoelectric isolating circuit three (3-8) and data acquisition circuit (5).
6. according to claim 1 or 2 described digitizing transformer temperature intelligent supervisory systems; it is characterized in that: described refrigeratory drives and protector (4) comprises a plurality of identical drivings and holding circuit module; each described driving and holding circuit module comprise three current transformers of motor (4-9) three-phase current that is used to gather refrigeratory; the signal time-sharing multiplex circuit two (4-2) that joins with three current transformers; the ac-dc converter circuit two (4-3) that joins with signal time-sharing multiplex circuit two (4-2); the amplifying circuit two (4-4) that joins with ac-dc converter circuit two (4-3); described signal time-sharing multiplex circuit two (4-2) and amplifying circuit two (4-4) all join with controller five (4-5); the input end of described controller five (4-5) also is connected to three toggle switchs three (4-6) of the rated power that is used for selected refrigeratory; the output terminal of the input termination pasta temperature controller (6) of described controller five (4-5); described controller five (4-5) joins with motor (4-9) by the photoelectric isolating circuit four (4-7) that joins successively and three-phase thyristor driving circuit (4-8) and controls the work of motor (4-9); the signal that described controller five (4-5) collection amplifying circuit two (4-4) is exported is also handled back output startup overcurrent by analysis; start phase shortage; the operation overload; operation phase shortage and five kinds of fault-signals of fault are given the controller six (4-10) that is connected on its output terminal; the input end of described controller six (4-10) is connected to and is used to import that this road refrigeratory drives and five toggle switchs (4-11) of the sequence numbering of protector (4), and described controller six (4-9) joins by photoelectric isolating circuit five (4-12) and data acquisition circuit (5) and communicates.
7. according to claim 1 or 2 described digitizing transformer temperature intelligent supervisory systems, it is characterized in that: described data acquisition circuit (5) comprises controller seven (5-1), and described controller seven (5-1) joins with winding temperature monitor (2) and pasta temperature controller (6) respectively and passes through I
2The C communication mode communicates, and described controller seven (5-1) joins by temperature and humidity controller (3) in photoelectric isolating circuit six (5-2) and refrigeratory driving and protector (4) and the case and carries out serial communication with master-slave mode.
8. according to claim 1 or 2 described digitizing transformer temperature intelligent supervisory systems; it is characterized in that: described pasta temperature controller (6) comprises and is used for digital temperature sensor three (6-1) that the pasta temperature is detected; controller eight (6-2) that joins with digital temperature sensor three (6-1) and the data storage circuitry one (6-3) that joins with controller eight (6-2); the signal that described controller eight (6-2) collection digital temperature sensor three (6-1) is exported is also handled back output control signal corresponding by analysis to the LED display circuit three (6-4) that is used to show the pasta temperature that is connected on its output terminal; be used in reference to the temperature control shelves pilot lamp (6-5) of temperature indicating control shelves and be used to the malfunction indicator lamp (6-6) of indicating refrigeratory and digital temperature sensor three (6-1) to break down; the output terminal of described controller eight (6-2) also is connected to superhigh temperature power-off protecting circuit (6-7) and is used for driving and the decoding output circuit (6-8) of protector (4) output switching signal to refrigeratory; described controller eight (6-2) is by RS485 telecommunication circuit one (6-9); optical fiber communication circuit one (6-10) or radio communication circuit one (6-11) join with transformer temperature remote monitor (7) and communicate, and the output terminal of described controller eight (6-2) and data acquisition circuit (5) join and pass through I with data acquisition circuit (5)
2The C communication mode communicates.
9. according to the described digitizing transformer of claim 8 temperature intelligent supervisory system, it is characterized in that: described temperature control shelves pilot lamp (6-5) comprises that temperature control shelves pilot lamp one, temperature that temperature reaches A shelves temperature reach the temperature control shelves pilot lamp two of B shelves temperature and the temperature control shelves pilot lamp three that temperature reaches C shelves temperature, 10 ℃＜A＜55 ℃ wherein, A+5 ℃＜B＜70 ℃, B+5 ℃＜C＜80 ℃; Described malfunction indicator lamp (6-6) comprises and is used to indicate the malfunction indicator lamp one that refrigeratory breaks down and is used for the malfunction indicator lamp two that designation number temperature sensor three (6-1) breaks down.
10. according to claim 1 or 2 described digitizing transformer temperature intelligent supervisory systems, it is characterized in that: described transformer temperature remote monitor (7) comprises controller nine (7-1) and the data storage circuitry two (7-2) that joins with controller nine (7-1), the input end of described controller nine (7-1) is connected to and is used for parameter setting circuit (7-3) that systematic parameter is provided with, described controller nine (7-1) is by RS485 telecommunication circuit two (7-4), optical fiber communication circuit two (7-5) or radio communication circuit two (7-15) join with pasta temperature controller (6) and communicate, the output terminal of described controller nine (7-1) is connected to and is used to report the voice broadcast circuit (7-6) of fault-signal and be used to show the pasta temperature, the LED display circuit four (7-7) of setup parameter and fault status information and be used for the output port of controller nine (7-1) expanded to 32 decoder circuit (7-8), the output terminal of the output terminal of described controller nine (7-1) and decoder circuit (7-8) all joins with 32 three-colour light-emitting pipe circuit (7-9), the output terminal of described controller nine (7-1) also be connected to controller nine (7-1) with I
2The controller ten (7-10) that the C communication mode communicates, the input end of described controller ten (7-10) is connected to the 4-bit DIP switch (7-11) of this digitizing transformer temperature intelligent supervisory system of input numbering, the output terminal of described controller ten (7-1) be connected to be used to comprehensive automation system of transformer substation provide digital signal telecommunication circuit (7-12), be used to comprehensive automation system of transformer substation that the D/A change-over circuit (7-13) of simulating signal is provided and be used to show winding temperature and the LED display circuit five (7-14) of the interior humiture of case.
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|---|---|---|---|
| CN2011201041212U CN202018607U (en) | 2011-04-11 | 2011-04-11 | Temperature intelligent monitoring system for digital transformer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011201041212U CN202018607U (en) | 2011-04-11 | 2011-04-11 | Temperature intelligent monitoring system for digital transformer |
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| CN202018607U true CN202018607U (en) | 2011-10-26 |
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| CN103051057A (en) * | 2012-12-04 | 2013-04-17 | 河南省电力公司驻马店供电公司 | Transformer equipment state overhaul intelligent management monitoring system |
| CN104701987A (en) * | 2015-03-19 | 2015-06-10 | 刘洋 | Intelligent substation |
| CN104865992A (en) * | 2015-03-26 | 2015-08-26 | 国网河南省电力公司平顶山供电公司 | Direct-current cooling system of main transformer of transformer substation |
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| CN103051057B (en) * | 2012-12-04 | 2015-08-05 | 河南省电力公司驻马店供电公司 | Condition-based Maintenance of Substation Equipment intelligent management supervisory control system |
| CN102946092B (en) * | 2012-12-06 | 2015-08-12 | 广州南方电力集团科技发展有限公司 | A kind of line transformer protective device with breaker tripping and closing current measurement |
| CN102946092A (en) * | 2012-12-06 | 2013-02-27 | 广州南方电力集团科技发展有限公司 | Line transformer protection device with tripping and closing current measuring function |
| CN105576608A (en) * | 2014-10-16 | 2016-05-11 | 上海船厂船舶有限公司 | Medium voltage transformation protection system |
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| CN104865992B (en) * | 2015-03-26 | 2017-06-06 | 国家电网公司 | A kind of main transformer of transformer substation once-through cooling system |
| CN104865992A (en) * | 2015-03-26 | 2015-08-26 | 国网河南省电力公司平顶山供电公司 | Direct-current cooling system of main transformer of transformer substation |
| US10909607B2 (en) | 2015-06-05 | 2021-02-02 | Boveda Inc. | Systems, methods and devices for controlling humidity in a closed environment with automatic and predictive identification, purchase and replacement of optimal humidity controller |
| US10055781B2 (en) | 2015-06-05 | 2018-08-21 | Boveda Inc. | Systems, methods and devices for controlling humidity in a closed environment with automatic and predictive identification, purchase and replacement of optimal humidity controller |
| CN106098305A (en) * | 2016-08-05 | 2016-11-09 | 太仓宏光自控电器设备有限公司 | A kind of high ferro row car transformer of band intelligent protection |
| CN106725332A (en) * | 2016-12-31 | 2017-05-31 | 江苏美伦影像***有限公司 | A kind of body temperature acquisition system |
| CN107131963A (en) * | 2017-06-15 | 2017-09-05 | 南京理工大学 | Mode of wireless transmission wet clutch friction steel disc transient state temperature field measuring system |
| CN107131963B (en) * | 2017-06-15 | 2019-12-27 | 南京理工大学 | Wireless transmission type wet clutch friction steel sheet transient temperature field measuring system |
| CN111896894A (en) * | 2020-07-15 | 2020-11-06 | 太原理工大学 | Embedded optical fiber detection device of transformer winding |
| CN112506256A (en) * | 2020-12-15 | 2021-03-16 | 长春路通轨道车辆配套装备有限公司 | Carbon fiber infrared self-heating system and control method |
| CN112506256B (en) * | 2020-12-15 | 2024-05-03 | 长春路通轨道车辆配套装备有限公司 | Carbon fiber infrared self-heating system and control method |
| CN113708503A (en) * | 2021-10-28 | 2021-11-26 | 山东颐德电气设备工程有限公司 | Control system for monitoring high-low voltage transformation equipment |
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Assignee: Xi'an Leixin Science and Technology Co., Ltd. Assignor: Gao Aixiang Contract record no.: 2014610000087 Denomination of utility model: Temperature intelligent monitoring system for digital transformer Granted publication date: 20111026 License type: Exclusive License Record date: 20140508 |
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