CN113917324A - Transformer on-load tap-changer on-line monitoring device based on multi-signal collaborative diagnosis - Google Patents
Transformer on-load tap-changer on-line monitoring device based on multi-signal collaborative diagnosis Download PDFInfo
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- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
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- G—PHYSICS
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- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
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Abstract
The invention provides a transformer on-load tap-changer on-line monitoring device based on multi-signal collaborative diagnosis, which comprises a signal acquisition unit, a signal processing unit, a central processing unit, a display unit, an early warning unit, a function selection unit and a mobile terminal, wherein the signal acquisition unit is used for acquiring a signal; the signal acquisition unit is used for acquiring an on-load tap-changer signal and sending the on-load tap-changer signal to the signal processing unit, the on-load tap-changer signal is processed by the signal processing unit and then sent to the central processing unit, the central processing unit analyzes the signal, forms a numerical value to be compared with a built-in threshold value, and then gives a judgment result, and the display unit displays the judgment result in real time; if the judgment result is abnormal, the early warning unit sends out an alarm signal and sends the judgment result and abnormal items to the mobile terminal. The on-load tap-changer on-line monitoring device for the transformer based on multi-signal collaborative diagnosis can realize real-time on-line monitoring at any time and any place, early warning is timely carried out when the on-load tap-changer is in an abnormal state, shutdown maintenance is avoided, and loss caused by faults is reduced.
Description
Technical Field
The invention relates to the field of monitoring of on-load tap-changers of power transformers, in particular to an on-load tap-changer on-line monitoring device of a transformer based on multi-signal collaborative diagnosis.
Background
With the development of the power industry, the capacity of power equipment and the scale of a power network are continuously enlarged, the social power consumption is increased day by day, once the power equipment fails, huge economic loss and adverse social influence can be caused, and higher requirements are provided for the power supply quality, so that effective measures are taken to improve the power supply quality of a power system and ensure the safety and reliability of the power system. The on-load tap changer is a core device for voltage regulation of an on-load tap changer, can change the turn ratio under the condition of transformer excitation or load to realize the regulation of the transformer, has the functions of stabilizing the central voltage of the load and regulating active power and reactive power in a power system, is used as the only movable mechanical part in the transformer, and can carry out a large amount of turn-off and turn-on operations in daily operation. However, the fault of the on-load tap-changer is also one of the main causes of transformer accidents, and the proportion is gradually increased, so that the on-load tap-changer is monitored on line, the labor cost can be reduced, and scientific guidance can be provided for reasonable operation and maintenance.
The detection of the on-load tap-changer at the present stage mainly stays in off-line detection. The off-line detection has the defects of high labor cost, complex operation steps and long overhaul period. In addition, offline detection has no early warning function, and when detection is carried out, a fault occurs, which is unavoidable economic loss.
In view of the above, there is a need to provide a novel on-load tap changer on-line monitoring device for transformer based on multi-signal cooperative diagnosis, so as to improve or even solve the above technical drawbacks.
Disclosure of Invention
The invention mainly aims to provide a transformer on-load tap-changer on-line monitoring device based on multi-signal collaborative diagnosis, and aims to solve the technical problem that the prior art cannot carry out real-time on-line monitoring on an on-load tap-changer.
In order to achieve the purpose, the invention provides a transformer on-load tap-changer on-line monitoring device based on multi-signal collaborative diagnosis, which comprises a signal acquisition unit, a signal processing unit, a central processing unit, a display unit, an early warning unit, a function selection unit and a mobile terminal, wherein the signal acquisition unit is used for acquiring a signal;
the signal acquisition unit is in signal connection with the signal processing unit, the signal processing unit is also in signal connection with the central processing unit, the central signal processing unit is also in signal connection with the early warning unit, the display unit and the function selection unit respectively, and the early warning unit is also in wireless signal connection with the mobile terminal;
the signal acquisition unit is used for acquiring an on-load tap-changer operation state signal and sending the on-load tap-changer operation state signal to the signal processing unit, the on-load tap-changer signal is processed by the signal processing unit and then sent to the central processing unit, the central processing unit analyzes the signal and forms a numerical value to be compared with a built-in threshold value, then a judgment result is given, meanwhile, the judgment result is sent to the display unit, and the display unit displays the judgment result in real time;
and if the judgment result given by the central processing unit is abnormal, sending a warning instruction and abnormal matters to the early warning unit, and sending an alarm signal by the early warning unit and sending the judgment result and the abnormal matters to the mobile terminal.
Optionally, the signal acquisition unit includes acceleration sensor, current sensor, infrared temperature sensor, rotation angle sensor and gas chromatography monitoring sensor, acceleration sensor is used for measuring on-load tap-changer's vibration signal, current sensor is used for measuring driving motor current signal, infrared temperature sensor is used for measuring the oil temperature, rotation angle sensor is used for measuring motor rotation angle, gas chromatography monitoring sensor is used for measuring on-load tap-changer oil tank gas content.
Optionally, the signal processing unit includes a conditioning circuit and an a/D conversion circuit, and the conditioning circuit is configured to process the signal transmitted by the signal acquisition unit and transmit the processed signal to the a/D conversion circuit.
Optionally, the display unit includes a master station computer and a liquid crystal display, and the master station computer and the liquid crystal display are respectively in signal connection with the central processing unit.
Optionally, the early warning unit includes GSM/GPRS module, WIFI module and alarm, be provided with the draw-in groove in the GSM/GPRS module, the draw-in groove is used for placing the SIM card, the WIFI module with the alarm respectively with central processing unit signal connection.
Optionally, the alarm is a buzzer.
Optionally, the function selection unit includes a function key, a virtual key, a parameter setting key and a history key, the function key includes a switch key, a reset key and a homepage key, the parameter setting key is used for entering a parameter setting interface, and the history key is used for entering a history viewing interface.
Optionally, the function key, the parameter setting key and the history key are all physical keys, and the virtual key is a touch key on the liquid crystal display.
Optionally, the mobile terminal is a smart phone or a tablet computer.
Optionally, the central processing unit includes a central processing chip, the central processing chip is embedded, and the central processing chip receives the signal in real time, completes data analysis and processing, and then issues an operation instruction.
In the scheme, the on-load tap-changer on-line monitoring device of the transformer based on multi-signal collaborative diagnosis comprises a signal acquisition unit, a signal processing unit, a central processing unit, a display unit, an early warning unit, a function selection unit and a mobile terminal; the signal acquisition unit is in signal connection with the signal processing unit, the signal processing unit is also in signal connection with the central processing unit, the central signal processing unit is also in signal connection with the early warning unit, the display unit and the function selection unit respectively, and the early warning unit is also in wireless signal connection with the mobile terminal; the signal acquisition unit is used for acquiring an on-load tap-changer operation state signal and sending the on-load tap-changer operation state signal to the signal processing unit, the on-load tap-changer signal is processed by the signal processing unit and then sent to the central processing unit, the central processing unit analyzes the signal, forms a numerical value to be compared with a built-in threshold value, then gives a judgment result, and sends the judgment result to the display unit, and the display unit displays the judgment result in real time; if the judgment result given by the central processing unit is abnormal, the judgment result and the abnormal matters are sent to the early warning unit, and the early warning unit sends out an alarm signal and sends the judgment result and the abnormal matters to the mobile terminal. The signal acquisition unit acquires signals and sends the signals to the signal processing unit, the signals are processed by the signal processing unit and then sent to the central processing unit, the central processing unit analyzes and processes the signals to form a numerical value which is compared with a built-in threshold value, and a judgment result is displayed on the display unit, so that the real-time monitoring of the online running state and the real-time display of the judgment result are realized; and when the judgment result is 'abnormal', the central processing unit sends an alarm signal to the early warning unit, the early warning unit sends an alarm after receiving the alarm signal and sends the alarm content to the mobile terminal, the mobile terminal can be a smart phone or a tablet personal computer, finally real-time online monitoring is realized anytime and anywhere, warning is timely given when the on-load tap-changer is in an abnormal state, shutdown maintenance is avoided, and loss caused by faults is reduced.
The technical scheme provided by the invention also has the following beneficial technical effects:
the invention provides a transformer on-load tap-changer on-line monitoring device based on multi-signal collaborative diagnosis, which is characterized in that vibration signals, driving motor current signals, oil temperature signals, motor rotation angle signals and oil tank gas content signals of an on-load tap-changer are respectively monitored in real time through an acceleration sensor, a current sensor, a temperature sensor, a rotation angle sensor and a gas chromatography monitoring sensor, all the signals are transmitted to a central processing unit after being processed by a signal processing unit, the central processing unit finishes signal analysis and state evaluation, and then the result is displayed in a display module in real time, the whole on-line monitoring process has real-time performance and is finished on line without shutdown and maintenance.
According to the invention, by collecting the vibration signal, the current signal of the driving motor, the oil temperature signal, the rotation angle signal of the motor and the gas content signal of the oil tank, each signal can reflect the running state of a specific part of the on-load tap-changer, and all types of signals are analyzed after being arranged together, so that the running state of the on-load tap-changer can be comprehensively evaluated, and the reliability of a diagnosis result is improved.
When the diagnosis result is abnormal, the central processing unit sends out an alarm instruction to the display unit and the early warning unit, the display unit displays abnormal events on the main station computer and the liquid crystal display, meanwhile, the early warning unit sends the abnormal events to the user mobile terminal through the GSM/GPRS module short message service and the WIFI module to give an alarm, the alarm can be a buzzer and also gives an alarm, potential fault hidden dangers are found in advance, precaution is carried out in the bud, the occurrence of faults is reduced or even avoided, and the economic loss caused by the fault is reduced.
The device has simple and convenient operation steps, can carry out corresponding parameter setting aiming at different environments and different types of on-load tap-changers, and has wide application range.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic block diagram of an on-load tap changer on-line monitoring device of a transformer based on multi-signal cooperative diagnosis according to the present invention;
fig. 2 is a schematic program diagram of the operation of the on-load tap changer on-line monitoring device of the transformer based on multi-signal cooperative diagnosis.
The reference numbers illustrate:
1. a signal acquisition unit; 2. a signal processing unit; 3. a central processing unit; 4. a display unit; 5. an early warning unit; 6. a mobile terminal; 7. a function selection unit; 8. an acceleration sensor; 9. a current sensor; 10. an infrared temperature sensor; 11. a rotation angle sensor; 12. a gas chromatography detection sensor; 13. a conditioning circuit; 14. A/D conversion; 15. a GSM/GPRS module; 16. a WIFI module; 17. an alarm; 18. a master station computer; 19. a liquid crystal display; 20. an embedded chip; 21. function keys; 22. virtual keys; 23. a parameter setting key; 24. a history key.
The implementation, functional features and advantages of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
It should be noted that all the directional indicators (such as the upper and lower … …) in the embodiment of the present invention are only used to explain the relative position relationship, movement, etc. of the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.
Moreover, the technical solutions in the embodiments of the present invention may be combined with each other, but it is necessary to be able to be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent, and is not within the protection scope of the present invention.
Referring to fig. 1, the invention provides an on-load tap changer on-line monitoring device of a transformer based on multi-signal collaborative diagnosis, which comprises a signal acquisition unit 1, a signal processing unit 2, a central processing unit 3, a display unit 4, an early warning unit 5, a function selection unit 7 and a mobile terminal 6;
the signal acquisition unit 1 is in signal connection with the signal processing unit 2, the signal processing unit 2 is also in signal connection with the central processing unit 3, the central signal processing unit 2 is also in signal connection with the early warning unit 5, the display unit 4 and the function selection unit 7 respectively, and the early warning unit 5 is also in wireless signal connection with the mobile terminal 6;
the signal acquisition unit 1 is used for acquiring an on-load tap-changer operation state signal and sending the on-load tap-changer operation state signal to the signal processing unit 2, the on-load tap-changer signal is processed by the signal processing unit 2 and then sent to the central processing unit 3, the central processing unit 3 analyzes the signal to form a numerical value, compares the numerical value with a built-in threshold value, then gives a judgment result, and sends the judgment result to the display unit 4, and the display unit 4 displays the judgment result in real time;
if the determination result is "abnormal", the central processing unit 3 sends the determination result and the abnormal event to the early warning unit 5, and the early warning unit 5 sends an alarm signal and sends the determination result and the abnormal event to the mobile terminal 6.
In the above embodiment, the state signal acquired by the signal acquisition unit 1 is sent to the signal processing unit 2, the signal is processed by the signal processing unit 2 and then sent to the central processing unit 3, the central processing unit 3 analyzes the output signal of the signal processing unit 2, forms a numerical value to compare with a built-in threshold value, and then displays the judgment result on the display unit 4, thereby realizing the online monitoring of the running state and the real-time display of the judgment result; when the judgment result is abnormal, the central processing unit 2 sends an alarm signal to the early warning unit 5, and the early warning unit 5 executes an alarm instruction after receiving the alarm signal to prompt an operator to check the reason of the abnormality in time and remove the abnormal state as soon as possible; meanwhile, the early warning unit 5 sends the alarm signal to the mobile terminal 6, and the mobile terminal 6 can be a smart phone or a tablet personal computer, so that real-time remote online monitoring at any time and any place is realized, warning is timely given when the on-load tap-changer is in an abnormal state, shutdown maintenance is avoided, and loss caused by faults is reduced. Of course, the user may modify the threshold range in the central processing unit 3 depending on the particular on-load tap-changer operating conditions. In particular, the signal connections may be electrical connections.
In one embodiment, the signal acquisition unit 1 includes an acceleration sensor 8, a current sensor 9, an infrared temperature sensor 10, a rotation angle sensor 11 and a gas chromatography monitoring sensor 12, the acceleration sensor 8 is used for measuring a vibration signal of the on-load tap-changer, the current sensor 9 is used for measuring a current signal of the driving motor, the infrared temperature sensor 10 is used for measuring oil temperature, the rotation angle sensor 11 is used for measuring a rotation angle of the motor, and the gas chromatography monitoring sensor 12 is used for measuring a gas content in an on-load tap-changer oil tank. The signal processing unit 2 comprises a conditioning circuit 13 and an A/D conversion 14 circuit, and the conditioning circuit 13 receives and processes the signal sent by the signal acquisition unit 1 and then transmits the signal to the A/D conversion 14 circuit. According to the embodiment, by collecting the vibration signal, the current signal of the driving motor, the oil temperature signal, the rotation angle signal of the motor and the gas content signal of the oil tank, each signal can reflect the running state of a specific part of the on-load tap-changer, and all types of signals are analyzed after being arranged together, so that the running state of the on-load tap-changer can be comprehensively evaluated, and the reliability of a diagnosis result is improved. Of course, in order to make the description as comprehensive as possible, in this embodiment, all of the 5 signals are selected to be collected, but in practical use, the types of the collected signals can be added or deleted in the main interface of the on-load tap changer on-line monitoring device of the transformer based on multi-signal collaborative diagnosis according to the needs of users, and these are included in the scope of the present invention to be protected.
In one embodiment, the display unit 4 comprises a master station computer 18 and a liquid crystal display 19, and the master station computer 18 and the liquid crystal display 19 are respectively in signal connection with the central processing unit 3. Specifically, the master station computer 18 is connected with the central unit through an RS232 serial port, the liquid crystal display 19 is connected with the central processing unit 3 through a sixteen-bit parallel port, and the liquid crystal display is provided with an ILI9341 controller, and the screen can be a capacitive touch screen or an RGB display screen.
In an embodiment, the early warning unit 5 includes a GSM/GPRS module 15, a WIFI module 16 and an alarm 17, a card slot is provided in the GSM/GPRS module 15, the card slot is used for placing a SIM card, the WIFI module 16 and the alarm 17 are respectively connected with the central processing unit 3, and the alarm 17 is a buzzer. Specifically, the GSM/GPRS module 15 is a module sms service, the model is SIM800A, a SIM card slot is configured, after the SIM card is inserted, the sms service is set to be opened, the WIFI module 16 adopts ESP8266, and is connected to the central processing unit 3 through an MINI serial port or an ISO serial port, and the early warning unit 5 and the central processing unit 3 can be connected through RS232 or RS 485. The GSM/GPRS module 15, the WIFI module 16 and the alarm 17 can be started or closed automatically according to user requirements on main interface parameter configuration, so that a user can set the device automatically according to actual needs, and convenience and flexibility of the device are improved.
In one embodiment, the function selecting unit 7 includes a function key 21, a virtual key 22, a parameter setting key 23, and a history key 24, the function key 21 includes a switch key, a reset key, and a home key, the parameter setting key 23 is used for accessing a parameter setting interface, and the history key 24 is used for accessing a history viewing interface. The function keys 21, the parameter setting keys 23 and the history keys 24 are all physical keys, and the virtual keys 22 are touch keys on the liquid crystal display 19.
In an embodiment, the central processing unit 3 comprises a central processing chip, which may be embedded 20, in particular, in the STM32 family. The central processing chip receives the signals in real time, completes data analysis and processing, and then sends out an operation instruction.
Referring to fig. 2, fig. 2 is a schematic diagram showing a procedure of the on-load tap-changer on-line monitoring device for a transformer based on multi-signal cooperative diagnosis according to the present invention. The specific operation process is as follows:
the device is started firstly, then the device automatically carries out system initialization and carries out circular detection for 50 times so as to confirm whether the SIM card is inserted into the card slot of the GSM/GPRS module 15 in the early warning unit 5, if the SIM card is not found, the circular detection is carried out again until the SIM card is confirmed to be in the card slot and then the SIM card enters the main interface.
In the main interface, optionally, the history interface is opened through the history key 24 to view the history diagnostic data, or the parameter setting key 23 is pressed to enter the parameter configuration interface, and the parameter fitting is performed through the function keys 21, wherein the keys are all physical keys. In addition, the history record viewing and parameter configuration can be performed through the virtual key 22 in the main interface.
After the parameter configuration is completed, the device can be operated, after the device is operated, the signal acquisition unit 1 performs a signal acquisition task on the on-load tap-changer, the signal processing unit 2 receives and processes signals input by the signal acquisition unit 1, the early warning unit 5 constantly keeps connection with the mobile terminal 6 and receives early warning instructions from the central processing unit 3 in a standby mode at any time, and the display unit 4 displays online diagnosis results from the central processing unit 3 in real time.
The acceleration sensor 8 collects vibration signals, and the vibration signals can monitor the on-load tap-changer switching time change, the spring elasticity condition, the contact abrasion, the phase synchronization error, the electric arc and other faults; the current sensor 9 collects current signals of the driving motor, and the current signals of the driving motor reflect the condition of the connecting rod of the on-load tap-changer; the infrared temperature sensor 10 collects oil temperature signals, thermal noise analysis is carried out on the oil temperature, and the local overheating condition of the on-load tap-changer can be monitored; a rotation angle sensor 11 collects a rotation angle signal of the motor, and the change of the rotation angle of the motor reflects the energy storage condition of the spring of the on-load tap-changer; the gas chromatographic monitoring sensor 12 collects the contents of the components of the gas in the oil tank, and the contents of the components of the gas can reflect the operating condition of the insulating oil.
The central processing unit 3 analyzes the vibration signal, the driving motor current signal, the oil temperature signal, the motor rotation angle signal and the gas component signal in the oil processed by the signal processing unit 2, outputs a numerical value to be compared with a built-in threshold value, and gives a judgment result of 'normal' or 'abnormal' according to the judgment condition of each signal.
When the central processing unit 3 gives the diagnosis result of "normal", the on-line diagnosis result will be transmitted to the display unit 4 in real time as "normal", and the master station computer 18 and the liquid crystal display 19 will also display the diagnosis result in real time as "normal".
When the central processing unit 3 gives the diagnosis result of 'abnormal', the abnormal events are sent to the display unit 4 and the early warning unit 5 in real time, the main station computer 18 and the liquid crystal display 19 of the display unit 4 display the 'abnormal' and the abnormal events in real time, meanwhile, the early warning unit 5 and the GSM/GPRS module 15 send a short message notice of the abnormal events to the user through the short message service, and the alarm 17 also gives an alarm. In addition, after the diagnosis result is abnormal, the device quits the warning state and carries out real-time online monitoring again after the technicians carry out inspection and maintenance until the state of the on-load tap-changer is recovered to be normal.
The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents made by the claims and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A transformer on-load tap-changer on-line monitoring device based on multi-signal collaborative diagnosis is characterized by comprising a signal acquisition unit, a signal processing unit, a central processing unit, a display unit, an early warning unit, a function selection unit and a mobile terminal;
the signal acquisition unit is in signal connection with the signal processing unit, the signal processing unit is also in signal connection with the central processing unit, the central signal processing unit is also in signal connection with the early warning unit, the display unit and the function selection unit respectively, and the early warning unit is also in wireless signal connection with the mobile terminal;
the signal acquisition unit is used for acquiring an on-load tap-changer operation state signal and sending the on-load tap-changer operation state signal to the signal processing unit, the on-load tap-changer signal is processed by the signal processing unit and then sent to the central processing unit, the central processing unit analyzes the signal and forms a numerical value to be compared with a built-in threshold value, then a judgment result is given, meanwhile, the judgment result is sent to the display unit, and the display unit displays the judgment result in real time;
and if the judgment result given by the central processing unit is abnormal, sending a warning instruction and abnormal matters to the early warning unit, and sending an alarm signal by the early warning unit and sending the judgment result and the abnormal matters to the mobile terminal.
2. The on-load tap-changer on-line monitoring device of the transformer based on multi-signal collaborative diagnosis as claimed in claim 1, wherein the signal acquisition unit comprises an acceleration sensor, a current sensor, an infrared temperature sensor, a rotation angle sensor and a gas chromatography monitoring sensor, the acceleration sensor is used for measuring vibration signals of the on-load tap-changer, the current sensor is used for measuring current signals of a driving motor, the infrared temperature sensor is used for measuring oil temperature, the rotation angle sensor is used for measuring rotation angle of the motor, and the gas chromatography monitoring sensor is used for measuring gas content of an on-load tap-changer oil tank.
3. The on-load tap changer on-line monitoring device for the transformer based on multi-signal collaborative diagnosis according to claim 2, wherein the signal processing unit comprises a conditioning circuit and an a/D conversion circuit, and the conditioning circuit is configured to process the signal transmitted by the signal acquisition unit and transmit the processed signal to the a/D conversion circuit.
4. The on-load tap-changer on-line monitoring device of the transformer based on multi-signal collaborative diagnosis as claimed in claim 1, wherein the display unit comprises a main station computer and a liquid crystal display, and the main station computer and the liquid crystal display are respectively connected with the central processing unit through signals.
5. The on-line monitoring device for the on-load tap-changer of the transformer based on the multi-signal collaborative diagnosis according to claim 1, wherein the early warning unit comprises a GSM/GPRS module, a WIFI module and an alarm, a clamping groove is formed in the GSM/GPRS module and used for placing an SIM card, and the WIFI module and the alarm are respectively in signal connection with the central processing unit.
6. The on-load tap changer on-line monitoring device for the transformer based on multi-signal collaborative diagnosis according to claim 5, wherein the alarm is a buzzer.
7. The on-load tap-changer on-line monitoring device of the transformer based on multi-signal collaborative diagnosis is characterized in that the function selection unit comprises function keys, a virtual key, a parameter setting key and a history key, the function keys comprise a switch key, a reset key and a homepage key, the parameter setting key is used for entering a parameter setting interface, and the history key is used for entering a history viewing interface.
8. The on-load tap-changer on-line monitoring device of the transformer based on multi-signal collaborative diagnosis of claim 7, wherein the function key, the parameter setting key and the history key are all physical keys, and the virtual key is a touch key on a liquid crystal display.
9. The on-load tap changer on-line monitoring device for the transformer based on multi-signal collaborative diagnosis according to any one of claims 1-8, wherein the mobile terminal is a smart phone or a tablet computer.
10. The on-load tap-changer on-line monitoring device for transformers based on multi-signal collaborative diagnosis according to any one of claims 1 to 8, characterized in that the central processing unit comprises a central processing chip, the central processing chip is embedded, and the central processing chip receives signals in real time, completes data analysis and processing, and issues operation instructions.
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| CN119492939A (en) * | 2024-11-22 | 2025-02-21 | 四川汇思电气有限公司 | A transformer oil level and temperature abnormal collaborative diagnosis device |
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