CN115223774B - State monitoring device for dry-type transformer and control method thereof - Google Patents
State monitoring device for dry-type transformer and control method thereof Download PDFInfo
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- CN115223774B CN115223774B CN202210662305.3A CN202210662305A CN115223774B CN 115223774 B CN115223774 B CN 115223774B CN 202210662305 A CN202210662305 A CN 202210662305A CN 115223774 B CN115223774 B CN 115223774B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/085—Cooling by ambient air
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F27/402—Association of measuring or protective means
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F27/402—Association of measuring or protective means
- H01F2027/406—Temperature sensor or protection
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- Housings And Mounting Of Transformers (AREA)
Abstract
The application discloses a state monitoring device of a dry-type transformer and a control method thereof, wherein the state monitoring device comprises a shell, a control device is arranged in the shell, and a display part, a button part, an interface part and a communication part which are respectively and electrically connected with the control device are arranged on the shell; the display part is used for displaying real-time data acquired by the state monitoring device and realizing fault alarm, the button part is used for adjusting working parameters of the state monitoring device, the interface part is used for acquiring working temperature of the dry-type transformer and realizing working control of the cooling fan and the dry-type transformer, and the communication part is used for transmitting the data acquired by the state monitoring device to external equipment; according to the dry-type transformer state monitoring device disclosed by the application, the data acquired by the state monitoring device and the fault information of the dry-type transformer can be transmitted to the external equipment through the communication part, so that a worker can conveniently know the working state of the dry-type transformer in real time, and the labor intensity of the worker is reduced.
Description
Technical Field
The application relates to the technical field of transformer state monitoring, in particular to a dry-type transformer state monitoring device and a control method thereof.
Background
At present, the dry-type transformer has poor heat balance performance, and in order to prevent the transformer from being damaged due to overhigh winding temperature of the dry-type transformer, a dry-type transformer temperature controller is adopted to monitor the three-phase temperature of the dry-type transformer, so that the stability and the safety degree of the dry-type transformer during working can be improved, and accidents caused by overhigh temperature rise are avoided.
The traditional dry-type transformer temperature controller can detect and display the running temperature of a transformer winding, can drive a fan to start and stop to realize forced air cooling, and gives an alarm on site according to a fault condition, but operation and maintenance personnel are required to regularly check the working data of the temperature controller, so that the labor cost is high and the labor intensity is high; in addition, when a failure occurs, a problem of maintenance lag may occur.
Furthermore, the traditional dry-type transformer temperature controller can only control the start and stop of the cooling fan, and has the advantages of simple control method and energy waste.
It can be seen that there is a need for improvements and improvements in the art.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, an object of the present application is to provide a dry-type transformer status monitoring device, which includes a communication portion, so that a worker can know the working condition of the dry-type transformer in real time, and the labor intensity of the worker is reduced.
In order to achieve the above purpose, the application adopts the following technical scheme:
the dry-type transformer state monitoring device comprises a shell, wherein a control device is arranged in the shell, and a display part, a button part, an interface part and a communication part which are respectively and electrically connected with the control device are arranged on the shell; the display part is used for displaying real-time data acquired by the state monitoring device and realizing fault alarm, the button part is used for adjusting working parameters of the state monitoring device, the interface part is used for acquiring working temperature of the dry-type transformer and realizing working control of the cooling fan and the dry-type transformer, and the communication part is used for transmitting the data acquired by the state monitoring device to external equipment.
In the dry-type transformer state monitoring device, the display part comprises a display screen and a plurality of indicator lamps, wherein the display screen and the indicator lamps are respectively and electrically connected with the control device, the display screen is used for displaying real-time data acquired by the state monitoring device, and the indicator lamps are used for indicating the working state of the state monitoring device and realizing working alarm; the button part comprises a plurality of control buttons which are respectively and electrically connected with the control device, and the interface part comprises a plurality of wiring terminals which are respectively and electrically connected with the control device; the communication part comprises 485 communication interfaces and Ethernet interfaces which are respectively and electrically connected with the control device.
In the dry-type transformer state monitoring device, the shell comprises a base and a panel fixedly arranged on the front side of the base, and the cross section area of the panel is larger than that of the base; the display part and the button are respectively arranged on the panel, the interface part and the communication part are respectively arranged on the rear side of the base, cooling fins are respectively arranged on the left side and the right side of the base, one end of each cooling fin is in butt joint with the panel, and the other end of each cooling fin is detachably connected with the base.
In the dry-type transformer state monitoring device, one side of the radiating fin is provided with a plurality of radiating strips, the other side of the radiating fin is provided with a stud and one or more positioning blocks, and the base is provided with a connecting hole and one or more positioning grooves; the connecting hole is connected with the stud in a matching way, and the positioning block is connected with the positioning groove in a matching way.
The application also correspondingly provides a control method of the dry-type transformer state monitoring device, which is used for realizing the working control of the dry-type transformer state monitoring device, wherein the state monitoring device is respectively connected with a temperature sensor and a cooling fan through an interface part, the cooling fan comprises a plurality of cooling fans, and the temperature sensor is used for detecting the winding temperature of the dry-type transformer; the control method comprises the following steps:
the working temperature, the temperature rise amplitude, the overtemperature alarm temperature, the overtemperature tripping temperature and the stopping temperature of the fan are preset in the control device;
the control device acquires real-time temperature fed back by the temperature sensor;
when the real-time temperature is more than or equal to the preset working temperature of the fan, the control device controls part of the cooling fan to start working;
when the working temperature of the fan is less than the real-time temperature and less than the overtemperature alarm temperature, and the rising amplitude of the real-time temperature is more than the preset rising amplitude in a certain time, the control device controls the operation frequency of the opened cooling fan to be increased;
when the real-time temperature is more than or equal to the preset overtemperature alarm temperature, the control device controls the display part and the communication part to output overtemperature alarm signals, controls the rest cooling fans to be started, and controls all fans to work at the preset maximum operating frequency;
when the real-time temperature is more than or equal to the preset overtemperature tripping temperature, the control device controls the display part and the communication part to output tripping signals and controls the dry-type transformer to trip.
In the control method, the control method further comprises the steps of:
the maximum detection temperature and the minimum detection temperature of the state monitoring device are preset in the control device;
the control device acquires real-time temperature fed back by the temperature sensor;
when the real-time temperature is more than the preset maximum detection temperature or less than the preset minimum detection temperature, the control device controls the display part and the communication part to output a fault alarm signal.
In the control method, the control method further comprises the steps of:
when the control device receives a control instruction of the simulation test and the real-time temperature is more than or equal to the preset overtemperature tripping temperature, the control device controls the display part and the communication part to output a tripping signal, and the dry-type transformer does not execute tripping action.
In the control method, the control device may obtain three-phase current of the dry-type transformer through the interface portion, and the control method further includes the steps of:
presetting a current maximum value in a control device;
when any one phase of current is not less than the preset current maximum value, the control device controls the dry-type transformer to execute tripping action after a certain time delay and controls the communication part and the display part to output tripping signals.
In the control method, the control device may obtain three-phase voltages through an interface portion, and the control method further includes the steps of:
when the three-phase voltage is greater than 80% of rated voltage and the voltage is kept stable for a certain time, the control device controls the display part and the communication part to output the information that the dry-type transformer works normally.
In the control method, the control method further comprises the steps of:
when the voltage of any one phase is less than or equal to the preset low-voltage protection voltage value, the control device controls the dry-type transformer to execute tripping action after a certain time delay, and controls the communication part and the display part to output tripping signals.
The beneficial effects are that:
the application provides a dry-type transformer state monitoring device, which can transmit data acquired by the state monitoring device and fault information of a dry-type transformer to external equipment through a communication part, so that a worker can conveniently know the working state of the dry-type transformer in real time, and the labor intensity of the worker is reduced; and the working parameters of the state monitoring device can be adjusted through the button part, so that the state monitoring device can be matched with various dry transformers, and the use experience of a user is improved.
In addition, the application also correspondingly provides a control method of the dry-type transformer state monitoring device, which can adjust the working state of the cooling fan according to the temperature preset in the control device, ensure the effective cooling of the dry-type transformer, and simultaneously reduce the working energy consumption of the cooling fan so as to achieve the aim of saving energy.
Drawings
Fig. 1 is a schematic diagram of a first structure of a dry-type transformer status monitoring device according to the present application;
fig. 2 is a schematic diagram of a second structure of the dry-type transformer status monitoring device according to the present application;
FIG. 3 is a first logic flow diagram of a control method provided by the present application;
FIG. 4 is a second logic flow diagram of a control method provided by the present application;
FIG. 5 is a third logic flow diagram of a control method provided by the present application;
fig. 6 is a fourth logic flow diagram of a control method provided by the present application.
Description of main reference numerals: 11-panel, 12-base, 13-apron, 14-constant head tank, 15-connecting hole, 21-display screen, 22-pilot lamp, 3-control button, 4-binding post, 51-485 communication interface, 52-ethernet interface, 6-fin, 61-heat dissipation strip, 62-locating piece, 63-double-screw bolt.
Detailed Description
The application provides a dry-type transformer state monitoring device and a control method thereof, which are used for making the purposes, technical schemes and effects of the application clearer and more definite, and the application is further described in detail below by referring to the accompanying drawings and the embodiments.
In the description of the present application, it should be understood that the directions or positional relationships indicated by the terms "front", "rear", "left", "right", etc. are based on the directions or positional relationships shown in the drawings, and are merely for convenience of description of the present application and for simplification of the description, and are not to be construed as limiting the present application; furthermore, the terms "mounted," "connected," and the like, are to be construed broadly and, as appropriate, the specific meaning of the terms in the present application will be understood by those of ordinary skill in the art.
Referring to fig. 1 and 2, the present application provides a dry-type transformer status monitoring device, which includes a housing, wherein a control device is disposed in the housing, and a display portion, a button portion, an interface portion, and a communication portion, which are respectively electrically connected with the control device, are disposed on the housing; the display part is used for displaying real-time data acquired by the state monitoring device and realizing fault alarm, the button part is used for adjusting working parameters of the state monitoring device, the interface part is used for acquiring working temperature of the dry-type transformer and realizing working control of the cooling fan and the dry-type transformer, and the communication part is used for transmitting the data acquired by the state monitoring device to external equipment.
The application discloses a dry-type transformer state monitoring device, which is characterized in that during actual operation, the working current, the working voltage and the winding temperature of a dry-type transformer are obtained through an interface part, and the device is connected with a cooling fan and the dry-type transformer through the interface part, so that the working control of the cooling fan and the tripping action of the dry-type transformer are realized; the operation data of the dry type transformer and the fault information of the dry type transformer obtained by the control device can be displayed through the display part or the data and the information can be transmitted to external equipment through the communication part, and the external equipment can be central monitoring equipment of a transformer substation or mobile equipment of a worker, so that the worker can conveniently know the working state of the dry type transformer in real time, and the labor intensity of the worker is reduced; further, the working parameters of the state monitoring device can be adjusted by the staff through the button part, so that the state monitoring device can be matched with various dry transformers, and the use experience of a user is improved.
Further, referring to fig. 1 and 2, the display portion includes a display screen 21 and a plurality of indicator lamps 22 electrically connected to the control device, wherein the display screen 21 is used for displaying real-time data acquired by the state monitoring device, such as temperature data, voltage data, current data, etc.; the indicator light 22 is used for indicating the working state of the state monitoring device and realizing working alarm; the button part comprises a plurality of control buttons 3 which are respectively and electrically connected with the control device, and the interface part comprises a plurality of wiring terminals 4 which are respectively and electrically connected with the control device; the communication part comprises 485 communication interfaces 51 and Ethernet interfaces 52, wherein the 485 communication interfaces 51 are respectively electrically connected with the control device.
In one embodiment, the display part includes 4 indicator lamps 22, and the 4 indicator lamps 22 are respectively used for indicating whether the state monitoring device is in a normal communication state, whether the dry-type transformer has a fault problem, whether the dry-type transformer performs a tripping action, and whether the dry-type transformer is in a normal working state; the button part comprises 6 control buttons 3, the control buttons 3 are reset buttons, and the 6 control buttons 3 are respectively used for executing up-shift, down-shift, left-shift, right-shift, ending and confirmation actions.
In an embodiment, a wireless communication chip is arranged in the control device, and the wireless communication chip can be a bluetooth chip or a WIFI chip, so as to realize wireless transmission of data and information, and further improve the use flexibility of the state monitoring device.
Further, referring to fig. 1 and 2, the housing includes a base 12 and a panel 11 fixed on the front side of the base 12, and the cross-sectional area of the panel 11 is larger than that of the base 12; the display part and the button are respectively arranged on the panel 11, the interface part and the communication part are respectively arranged on the rear side of the base 12, the left side and the right side of the base 12 are respectively provided with a radiating fin 6, one end of the radiating fin 6 is abutted against the panel 11, and the other end of the radiating fin 6 is detachably connected with the base 12; the panel 11 with larger cross section area and the radiating fins 6 can be used for realizing the heat radiation of the state monitoring device, and the stability and the safety of the state monitoring device during operation are improved.
Further, referring to fig. 2, a plurality of heat dissipating strips 61 are disposed on one side of the heat dissipating fin 6, a stud 63 and one or more positioning blocks 62 are disposed on the other side of the heat dissipating fin 6, and a connecting hole 15 and one or more positioning grooves 14 are formed in the base 12; the connecting holes 15 are matched and connected with the studs 63 to fix the radiating fins 6; the positioning block 62 is cooperatively connected with the positioning groove 14 to realize rapid positioning and installation of the cooling fin 6, and can prevent the cooling fin 6 from shaking left and right in the working process of the state monitoring device, so that the stability of the cooling fin 6 in working is improved; in one embodiment, the connection hole 15 is bolted with the stud 63; the heat dissipation strips 61, the studs 63 and the positioning blocks 62 are respectively integrally formed with the heat dissipation fins 6, five heat dissipation strips 61 are arranged on one side of the heat dissipation fins 6, 3 positioning blocks 62 are arranged on the other side of the heat dissipation fins 6, and 3 positioning grooves 14 are correspondingly formed in the shell.
Further, the shell is further provided with an infrared receiver electrically connected with the control device, and the infrared receiver is used for receiving infrared signals emitted by the infrared remote control, so that working parameters of the state monitoring device can be remotely adjusted by workers through the infrared remote control, and the use flexibility of the state monitoring device is improved.
Further, an acoustic alarm electrically connected with the control device is further arranged in the shell, the acoustic alarm can be a miniature sound box or a buzzer, and when a fault problem occurs or the dry-type transformer executes tripping action, the acoustic alarm can be realized through the acoustic alarm, so that staff positioned on the periphery of the dry-type transformer can quickly maintain the dry-type transformer.
Further, a cover plate 13 is disposed on the rear side of the base 12, the cover plate 13 is detachably connected with the base 12, such as a bolt connection, the interface part and the communication part are disposed on the cover plate 13, and the control device is disposed in the base 12; when a line fault problem or a wiring abnormality problem occurs, an operation and maintenance person can open the cover plate 13 to maintain the control device inside the cover plate 13, so that operation and maintenance difficulty is reduced.
Referring to fig. 3 to 6, the present application further provides a control method of a dry-type transformer status monitoring device, where the control method is used to implement operation control of the dry-type transformer status monitoring device as described in any one of the above, the status monitoring device is connected to a temperature sensor and a cooling fan through an interface, the cooling fan includes a plurality of cooling fans, and the temperature sensor is used to detect winding temperature of the dry-type transformer; the control method comprises the following steps:
s100, presetting the working temperature, the temperature rise amplitude, the overtemperature alarm temperature, the overtemperature trip temperature and the stopping temperature of the fan in a control device; in one embodiment, the working temperature of the fan may be 100 ℃, the temperature rise temperature may be 3 ℃, the overtemperature alarm temperature may be 130 ℃, the overtemperature trip temperature may be 150 ℃, and the overtemperature trip temperature may be set by a worker according to the performance parameters and the working environment of the dry-type transformer.
S200, the control device acquires real-time temperature fed back by the temperature sensor;
s300, when the real-time temperature is more than or equal to the preset working temperature of the fan, the control device controls part of the cooling fan to start working; specifically, when the real-time temperature is more than or equal to the preset fan working temperature, if the cooling fans comprise N cooling fans, N is a multiple of 2, the control device firstly controls N/2 cooling fans to start working, and if N is not a multiple of 2, the control device firstly controls N/2+1 cooling fans to start working; for example, if the cooling fans include 6 cooling fans, the control device may control 3 cooling fans to start working first; when the cooling fan starts to work, the control device controls the cooling fan to operate at a preset working frequency, and the preset working frequency is smaller than the maximum operating frequency of the cooling fan.
S400, when the working temperature of the fan is less than the real-time temperature and less than the overtemperature alarm temperature, and the rising amplitude of the real-time temperature is more than the preset rising amplitude of the temperature in a certain time, the control device controls the operation frequency of the opened cooling fan to be increased so as to improve the cooling effect on the dry type transformer, thereby reducing the rising amplitude or reducing the winding temperature of the dry type transformer; in one embodiment, the certain time is 1 minute, and the certain time can be set by a worker according to the working environment and working parameters of the dry-type transformer.
S500, when the real-time temperature is more than or equal to the preset overtemperature alarm temperature, the control device controls the display part and the communication part to output overtemperature alarm signals, controls the rest cooling fans to be started, and controls all fans to work at the preset maximum operating frequency, so that the temperature of the dry-type transformer winding is rapidly reduced; specifically, the control device controls the alarm indicator lamp 22 to be lightened, and outputs an alarm signal with overhigh temperature in a wired or wireless communication mode, so that a worker can know that the winding of the dry-type transformer has an overtemperature problem in time.
S600, when the real-time temperature is more than or equal to the preset overtemperature tripping temperature, the control device controls the display part and the communication part to output tripping signals and controls the dry-type transformer to trip; specifically, after the dry-type transformer performs the tripping operation, the control device controls the tripping indicator lamp 22 to be turned on, and outputs a tripping signal in a wired or wireless communication manner, so that a worker can perform the restarting operation of the dry-type transformer in time.
According to the control method disclosed by the application, the working state of the cooling fan can be adjusted according to the real-time winding temperature fed back by the temperature sensor, so that the purpose of energy conservation is achieved while the effective heat dissipation of the dry-type transformer is realized and the working energy consumption of the cooling fan is reduced.
Further, referring to fig. 4, the control method further includes the steps of:
s101, presetting a maximum detection temperature and a minimum detection temperature of a state monitoring device in a control device;
s200, the control device acquires real-time temperature fed back by the temperature sensor;
s700, when the real-time temperature is more than the preset maximum detection temperature or less than the preset minimum detection temperature, the control device controls the display part and the communication part to output a fault alarm signal; specifically, the control device controls the alarm indicator lamp 22 to be lightened, and outputs a signal of abnormal operation of the temperature sensor to the staff through a wired or wireless communication mode; in one embodiment, the maximum detected temperature is 240 ℃ and the minimum detected temperature is-30 ℃, which can be set by a worker according to the performance parameters of the temperature sensor.
Further, referring to fig. 3, the control method further includes the steps of:
s610, when the control device receives a control instruction of the simulation test and when the real-time temperature is more than or equal to the preset overtemperature tripping temperature, the control device controls the display part and the communication part to output tripping signals, and the dry-type transformer does not execute tripping action; specifically, the control device controls the trip indicator lamp 22 to be lighted, and outputs a trip signal to the worker through the communication part, indicating that the communication function is normal.
When the simulation test is performed, the simulation test does not support the tripping function in order to avoid causing false tripping of the dry-type transformer, but the tripping indicator lamp 22 is normally lighted; in addition, the cooling fan and the warning indicator lamp 22 are normally operated when the simulation test is performed.
Before the state monitoring device is formally put into operation, the temperature of each phase of the transformer can be zeroed, the state monitoring device is also used for receiving real-time data fed back by three second temperature sensors, and the three second temperature sensors are respectively used for acquiring three-phase temperatures; specifically, each phase temperature zeroing comprises the following steps:
s1010, the control device acquires the actual temperature of each phase of the dry-type transformer, and the actual temperature is input into the state detection device through the button part after being detected by a worker in the field;
s1020, the control device acquires the real-time temperature of the three phases fed back by the second temperature sensor;
s1030, comparing the actual temperature of the three phases with the real-time temperature of the three phases, judging whether the deviation exceeds a preset compensation range if the deviation exists, and if the deviation exceeds the preset compensation range, turning on the alarm indicator lamp 22, and controlling the communication part to output abnormal information of the second temperature sensor by the control device; if the temperature does not exceed the preset compensation range, compensating the real-time temperature of the three phases; in one embodiment, the compensation range is-19.9 ℃ to +19.9 ℃.
Further, referring to fig. 5, the control device may obtain three-phase current of the dry-type transformer through the interface portion, and the control method further includes the steps of:
s810, presetting a current maximum value in a control device;
s820, the control device acquires three-phase current, and when any one-phase current is more than or equal to a preset current maximum value, the control device controls the dry-type transformer to execute tripping action after a certain time delay and controls the communication part and the display part to output tripping signals; specifically, the control device controls the tripping signal lamp to be lightened, and outputs a tripping signal to staff in a wired or wireless communication mode; in one embodiment, the certain time may be 30 seconds; the maximum value of the current and the certain time can be set by a worker according to the working parameters and the working environment of the dry-type transformer.
The control method disclosed by the application can also monitor the three-phase current of the dry-type transformer in real time, when the current is overlarge, the control device controls the dry-type transformer to execute tripping action after delaying for a certain time, thereby playing a role of relay protection, realizing overcurrent protection and improving the safety of the dry-type transformer in working.
Further, referring to fig. 6, the control device may obtain three-phase voltages of the dry-type transformer through the interface portion, and the control method further includes the steps of:
s910, when the three-phase voltage is greater than 80% of rated voltage and the voltage is kept stable for a certain time, the control device controls the display part and the communication part to output the information that the dry-type transformer works normally, specifically, the control device controls the work indicator lamp 22 to be lightened, and outputs the information that the dry-type transformer works normally to staff in a wired or wireless communication mode; otherwise, when any one of the conditions is not met, the control device controls the fault indicator lamp 22 to be lightened, and outputs the unstable information of the dry-type transformer to the staff in a wired or wireless communication mode; in one embodiment, the certain time may be 2 seconds, and the certain time and the rated voltage may be preset in the control device by a worker according to an operation parameter and an operation environment of the dry-type transformer.
Further, referring to fig. 6, the control method further includes the steps of:
s920, when the voltage of any one phase is less than or equal to a preset low-voltage protection voltage value, the control device controls the dry-type transformer to execute tripping action after a certain time delay, and controls the communication part and the display part to output tripping signals; specifically, the control device controls the tripping signal lamp to be lightened, and outputs a tripping signal to staff in a wired or wireless communication mode; in one embodiment, the time period may be 30 seconds, and the time period and the low voltage protection value may be preset in the control device by a worker according to the operation parameters and the operation environment of the dry type transformer.
The control method disclosed by the application can also monitor the three-phase voltage of the dry-type transformer in real time, when the voltage is too low, the control device controls the dry-type transformer to execute tripping action after a certain time delay, thereby playing a role in relay protection, realizing low-voltage protection and improving the safety of the dry-type transformer in working.
Further, referring to fig. 6, the control method further includes the steps of:
s930, when the voltage of any one phase is more than or equal to a preset voltage fixed value, the control device controls the dry-type transformer to execute tripping action after a certain time delay, and controls the communication part and the display part to output tripping signals; specifically, the control device controls the tripping signal lamp to be lightened, and outputs a tripping signal to staff in a wired or wireless communication mode; in one embodiment, the certain time may be 30 seconds, and the voltage constant and the certain time may be preset in the control device by a worker according to an operation parameter and an operation environment of the dry-type transformer.
The control method disclosed by the application can also monitor the three-phase voltage of the dry-type transformer in real time, when the voltage is overlarge, the control device controls the dry-type transformer to execute tripping action after delaying for a certain time, thereby playing a role in relay protection, realizing overvoltage protection and improving the safety of the dry-type transformer in working.
It will be understood that equivalents and modifications will occur to those skilled in the art based on the present application and its spirit, and all such modifications and substitutions are intended to be included within the scope of the present application.
Claims (9)
1. The control method of the dry-type transformer state monitoring device is characterized in that the dry-type transformer state monitoring device comprises a shell, a control device is arranged in the shell, and a display part, a button part, an interface part and a communication part which are respectively and electrically connected with the control device are arranged on the shell; the display part is used for displaying real-time data acquired by the state monitoring device and realizing fault alarm, the button part is used for adjusting working parameters of the state monitoring device, the interface part is used for acquiring working temperature of the dry-type transformer and realizing working control of the cooling fan and the dry-type transformer, and the communication part is used for transmitting the data acquired by the state monitoring device to external equipment; the state monitoring device is respectively connected with a temperature sensor, a cooling fan and a second temperature sensor through an interface part, the cooling fan comprises a plurality of temperature sensors, the temperature sensors are used for detecting the winding temperature of the dry-type transformer, the second temperature sensors comprise three, and the three second temperature sensors are respectively used for acquiring three-phase temperatures; the control method comprises the following steps:
the working temperature, the temperature rise amplitude, the overtemperature alarm temperature, the overtemperature tripping temperature and the stopping temperature of the fan are preset in the control device;
the control device obtains the actual temperature of each phase of the dry-type transformer;
the control device acquires the real-time temperature of the three phases fed back by the second temperature sensor;
comparing the actual temperature of the three phases with the real-time temperature of the three phases, judging whether the deviation exceeds a preset compensation range if the deviation exists, controlling an alarm indicator lamp to be on if the deviation exceeds the preset compensation range, and controlling a communication part to output abnormal information of the second temperature sensor by a control device; if the temperature does not exceed the preset compensation range, compensating the real-time temperature of the three phases;
the control device acquires real-time temperature fed back by the temperature sensor;
when the real-time temperature fed back by the temperature sensor is more than or equal to the preset working temperature of the fan, the control device controls part of the cooling fan to start working; specifically, when the fans comprise N fans, if N is a multiple of 2, the control device firstly controls N/2 cooling fans to start working, and if N is not a multiple of 2, the control device firstly controls N/2+1 cooling fans to start working;
when the preset working temperature of the fan is less than the real-time temperature fed back by the temperature sensor and less than the preset overtemperature alarm temperature, and the rising amplitude of the real-time temperature fed back by the temperature sensor is more than the preset rising amplitude of the temperature in a certain time, the control device controls the operation frequency of the started cooling fan to be increased;
when the real-time temperature fed back by the temperature sensor is more than or equal to the preset overtemperature alarm temperature, the control device controls the display part and the communication part to output overtemperature alarm signals, controls the rest cooling fans to be started, and controls all fans to work at the preset maximum operating frequency;
when the real-time temperature fed back by the temperature sensor is more than or equal to the preset overtemperature tripping temperature, the control device controls the display part and the communication part to output tripping signals and controls the dry-type transformer to trip.
2. The control method according to claim 1, wherein the display part includes a display screen and a plurality of indicator lamps, which are electrically connected with the control device, respectively, the display screen is used for displaying real-time data acquired by the state monitoring device, and the indicator lamps are used for indicating the working state of the state monitoring device and for realizing working alarm; the button part comprises a plurality of control buttons which are respectively and electrically connected with the control device, and the interface part comprises a plurality of wiring terminals which are respectively and electrically connected with the control device; the communication part comprises 485 communication interfaces and Ethernet interfaces which are respectively and electrically connected with the control device.
3. The control method according to claim 1, wherein the housing includes a base and a panel fixed to a front side of the base, a cross-sectional area of the panel being larger than a cross-sectional area of the base; the display part and the button are respectively arranged on the panel, the interface part and the communication part are respectively arranged on the rear side of the base, cooling fins are respectively arranged on the left side and the right side of the base, one end of each cooling fin is in butt joint with the panel, and the other end of each cooling fin is detachably connected with the base.
4. The control method according to claim 3, wherein a plurality of heat dissipating strips are arranged on one side of the heat dissipating fin, a stud and one or more positioning blocks are arranged on the other side of the heat dissipating fin, and a connecting hole and one or more positioning grooves are formed in the base; the connecting hole is connected with the stud in a matching way, and the positioning block is connected with the positioning groove in a matching way.
5. The control method according to claim 1, characterized in that the control method further comprises the step of:
the maximum detection temperature and the minimum detection temperature of the state monitoring device are preset in the control device;
the control device acquires real-time temperature fed back by the temperature sensor;
when the real-time temperature is more than the preset maximum detection temperature or less than the preset minimum detection temperature, the control device controls the display part and the communication part to output a fault alarm signal.
6. The control method according to claim 1, characterized in that the control method further comprises the step of:
when the control device receives a control instruction of the simulation test and the real-time temperature is more than or equal to the preset overtemperature tripping temperature, the control device controls the display part and the communication part to output a tripping signal, and the dry-type transformer does not execute tripping action.
7. The control method according to claim 1, wherein the control device can obtain three-phase current of the dry-type transformer through the interface portion, the control method further comprising the step of:
presetting a current maximum value in a control device;
when any one phase of current is not less than the preset current maximum value, the control device controls the dry-type transformer to execute tripping action after a certain time delay and controls the communication part and the display part to output tripping signals.
8. The control method according to claim 1, wherein the control device can acquire three-phase voltages through an interface section, the control method further comprising the step of:
when the three-phase voltage is greater than 80% of rated voltage and the voltage is kept stable for a certain time, the control device controls the display part and the communication part to output the information that the dry-type transformer works normally.
9. The control method according to claim 1, characterized in that the control method further comprises the step of:
when the voltage of any one phase is less than or equal to the preset low-voltage protection voltage value, the control device controls the dry-type transformer to execute tripping action after a certain time delay, and controls the communication part and the display part to output tripping signals.
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| CN202210662305.3A CN115223774B (en) | 2022-06-13 | 2022-06-13 | State monitoring device for dry-type transformer and control method thereof |
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| CN202210662305.3A CN115223774B (en) | 2022-06-13 | 2022-06-13 | State monitoring device for dry-type transformer and control method thereof |
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| CN115223774A (en) | 2022-10-21 |
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