High-efficiency and energy-saving modular control system capable of automatically adjusting temperature and humidity for transformer

Abstract

The invention relates to the technical field of power equipment, in particular to an efficient and energy-saving modular control system for automatically adjusting temperature and humidity of a transformer, which can monitor the temperature and humidity of the transformer and the external environment thereof in real time, and automatically adjust the heat dissipation and dehumidification process according to the monitoring result, so that efficient and energy-saving temperature and humidity self-adjustment is realized. The transformer is ensured to work in the optimal operation environment; in addition, the system also has a modular design, so that part of modules can be conveniently replaced under the condition of uninterruptible power supply, and the maintenance efficiency is effectively improved; meanwhile, the system can transmit real-time monitoring data to a remote monitoring center through a remote communication module, and when the temperature or humidity of the transformer exceeds a set threshold value, an alarm instruction can be sent to the remote monitoring center in time to remind operation and maintenance personnel to handle in time.

Description

Technical Field

[0001] The invention relates to the technical field of electric power equipment, and in particular to a modular control system for a transformer with high efficiency, energy saving and self-regulating temperature and humidity. Background Art

[0002] Transformers are vital equipment in the power system, and their normal operation directly affects the safety and stability of the power grid. However, in actual operation, transformers are easily affected by the temperature and humidity of the external environment. Especially in a high humidity environment, when the transformer body is damp, the insulation performance of the transformer will be reduced; the internal insulation material will slowly absorb moisture, causing the insulation material to age, which is prone to insulation breakdown failure; it can also cause corrosion of the metal parts inside the transformer, thereby affecting the service life and normal operation of the transformer. In addition, the transformer will generate a lot of heat when running under load. If the heat cannot be dissipated in time, it will cause the temperature to be too high, causing failures or even fires.

[0003] Existing transformer temperature control mostly uses simple temperature monitoring and fan cooling methods, which lack intelligence and adaptive capabilities and cannot be dynamically adjusted according to actual conditions. At the same time, traditional control systems require the transformer equipment to be powered off for maintenance and component replacement, which increases maintenance time and costs. Summary of the invention

[0004] The purpose of the present invention is to avoid the shortcomings of the prior art and provide a modular control system for transformers with high efficiency, energy saving and self-adjusting temperature and humidity. The system can monitor the temperature and humidity of the transformer and its external environment in real time, and automatically adjust the heat dissipation and dehumidification process according to the monitoring results to ensure that the transformer works in the best operating environment. In addition, the system also has a modular design, and some modules can be easily replaced without power outage, which effectively improves maintenance efficiency.

[0005] The above-mentioned purpose of the present invention is achieved by the following technical measures:

[0006] A modular control system for transformers with high efficiency, energy saving and self-adjusting temperature and humidity, the system includes multiple functional modules, each of which is connected by a hot-swappable plug-in connector; wherein the multiple functional modules include: a programmable PLC main controller, a control module, a data acquisition module, a communication module, a storage module, a liquid crystal interactive display module, and a power management module; the control module includes a command controller, a temperature controller, a humidity controller, and an alarm controller; the data acquisition module includes a temperature sensor and a humidity sensor; the communication module includes an RS485 communication function and an Ethernet communication function; the storage module includes a command storage function and a black box function; the liquid crystal interactive display module includes a liquid crystal display module, a keyboard and a key module, and a power drive module; the power management module includes a power output module, a power distribution module, and a power safety management module; the temperature sensor is used to detect the coil, the core and the external environment temperature of the transformer; the humidity sensor is used to detect the humidity of the external environment of the transformer; the system is also provided with a heat dissipation device and / or a dehumidification device. The above-mentioned functional modules can be fully integrated in the programmable PLC main controller, or partially integrated in the programmable PLC main controller.

[0007] Furthermore, the temperature sensor is a five-way temperature sensor, all of which use PT100 temperature sensors, and the five-way temperature sensors include: a first-phase coil temperature sensor, used to detect the first-phase coil temperature of the transformer; a second-phase coil temperature sensor, used to detect the second-phase coil temperature of the transformer; a third-phase coil temperature sensor, used to detect the third-phase coil temperature of the transformer; a core temperature sensor, used to detect the core temperature of the transformer; and an ambient temperature sensor, used to detect the external ambient temperature of the transformer.

[0008] Furthermore, the heat dissipation device and / or dehumidification device includes: a DC brushless cross-flow heat dissipation fan for dissipating heat and / or dehumidifying the transformer; and a ceramic heating plate for dehumidifying the transformer.

[0009] Furthermore, the temperature adjustment method of the system is: when the temperatures detected by the five temperature sensors are all less than 90°C, the programmable PLC main controller outputs instructions to control the DC brushless cross-flow cooling fan to be turned off, and no heat dissipation is required;

[0010] When the temperature detected by one of the five temperature sensors is greater than or equal to 90°C, the programmable PLC main controller outputs an instruction to control the DC brushless cross-flow cooling fan to start running and dissipate heat, and the programmable PLC main controller uses the following formula to determine the operating output power percentage of the DC brushless cross-flow cooling fan:

[0011] P = 1 / 60 × (T-90)

[0012] Wherein P is the operating output power percentage of the DC brushless cross-flow cooling fan, in %, and T is the highest temperature detected by the five temperature sensors, in °C;

[0013] When the temperature detected by one of the five temperature sensors is greater than or equal to 130° C., the programmable PLC main controller starts an alarm program through the alarm controller;

[0014] When the temperature detected by one of the five temperature sensors is greater than or equal to 150° C., the programmable PLC main controller outputs an instruction to control the DC brushless cross-flow cooling fan to operate at 100% output power, and at the same time, the programmable PLC main controller sends a remote alarm instruction through the communication module;

[0015] When the temperature detected by one of the five temperature sensors is greater than or equal to 180° C., the programmable PLC main controller sends a remote alarm instruction and an over-temperature trip instruction through the communication module.

[0016] Further, the humidity adjustment method of this system is:

[0017] When the humidity sensor detects that the relative humidity is less than 80%, the programmable PLC main controller outputs instructions to control the DC brushless cross-flow cooling fan and the ceramic heating plate to be turned off, and no dehumidification is required;

[0018] When the humidity sensor detects that the relative humidity is greater than or equal to 80%, the programmable PLC main controller outputs instructions to control the DC brushless cross-flow cooling fan to start running and the ceramic heating plate to generate heat for dehumidification.

[0019] Furthermore, the programmable PLC main controller monitors the temperature and humidity of the transformer in real time through the temperature sensor and the humidity sensor respectively, and the cycle time of the cyclic monitoring is 0.5 hours.

[0020] Furthermore, a programmable digital potentiometer is connected between the DC brushless cross-flow cooling fan and the programmable PLC main controller. The programmable digital potentiometer is a CMOS programmable digital potentiometer, and the CMOS programmable digital potentiometer is used to adjust the rotation speed of the DC brushless cross-flow cooling fan.

[0021] Furthermore, the liquid crystal display module of the liquid crystal interactive display module is an OLED liquid crystal display panel.

[0022] Furthermore, the system is also provided with an alarm, which is connected to the programmable PLC main controller; when the temperature or humidity of the transformer exceeds a set threshold, the alarm sends out an audible and visual alarm signal.

[0023] Furthermore, the system is also provided with an aluminum alloy protective cover, which is installed on the periphery of the transformer. The outer side of the aluminum alloy protective cover is provided with standardized interfaces corresponding to various functional modules. Through the standardized interfaces, maintenance personnel can disassemble or install the corresponding modules by hand.

[0024] The invention provides a modular control system for transformers with high efficiency, energy saving and self-adjusting temperature and humidity, which has the following beneficial effects:

[0025] 1. Modular design: The system adopts a modular design. Each functional module is connected by a hot-swappable plug-in connector. Some modules can be replaced quickly and conveniently without power failure, which improves maintenance efficiency.

[0026] 2. Self-regulating the temperature and humidity of the transformer: The system's programmable PLC main controller monitors the temperature and humidity of the transformer in real time through temperature sensors and humidity sensors respectively. When the temperature or humidity of the transformer exceeds the set threshold, the programmable PLC main controller will promptly drive functional modules such as the heat dissipation device and / or dehumidification device to work to dissipate heat and / or dehumidify the transformer; when the temperature or humidity of the transformer is lower than the set threshold, the programmable PLC main controller will promptly control functional modules such as the heat dissipation device and / or dehumidification device to stop working, thereby achieving efficient and energy-saving self-regulating temperature and humidity.

[0027] 3. Remote monitoring and alarm: The system's programmable PLC main controller transmits real-time monitoring data to the remote monitoring center through the communication module. When the temperature or humidity of the transformer exceeds the set threshold, an alarm command can be sent to the remote monitoring center in time to remind the operation and maintenance personnel to deal with it in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present invention is further described with reference to the accompanying drawings, but the contents in the accompanying drawings do not constitute any limitation to the present invention.

[0029] Figure 1 It is a schematic diagram of the logical structural relationship of the system subdivision modules of the present invention.

[0030] Figure 2 It is a schematic diagram of the system structure framework when the present invention is applied to a three-phase transformer.

[0031] Figure 3 The system operation control flow chart of the present invention.

[0032] Figure 4It is a linear correspondence diagram between the operating output power percentage P of the DC brushless cross-flow cooling fan of the present invention and the detected maximum temperature T.

[0033] Figure 5 The present invention provides a parameter setting and wiring panel diagram for the programmable PLC main controller (including monitoring device) and the liquid crystal interactive display module.

[0034] Figure 6 It is a schematic diagram of the three-dimensional structure of the present invention.

[0035] Figure 7 It is a schematic diagram of the three-dimensional structure of the present invention when a part of the aluminum alloy protective cover is removed.

[0036] Figure 8 It is a schematic diagram of the exploded three-dimensional structure of the present invention.

[0037] exist Figures 1 to 8 Including:

[0038] Programmable PLC master controller 100,

[0039] temperature sensor 200, first phase coil temperature sensor 201, second phase coil temperature sensor 202, third phase coil temperature sensor 203, core temperature sensor 204, ambient temperature sensor 205,

[0040] Humidity sensor 300, humidity controller 301, ceramic heating plate 302,

[0041] DC brushless cross-flow cooling fan 400, programmable digital potentiometer 401,

[0042] Remote communication module 500,

[0043] Liquid crystal interactive display module 600,

[0044] Alarm 700,

[0045] Aluminum alloy protective cover 800,

[0046] Transformer 900. DETAILED DESCRIPTION

[0047] The technical solution of the present invention is further described in conjunction with the following embodiments.

[0048] like Figure 1As shown, a modular control system for transformers with high efficiency, energy saving and self-adjusting temperature and humidity includes multiple functional modules, each of which is connected by a hot-swappable plug-in connector, and the plug-in connector can be a USB interface, a SATA interface, a PCIe interface, a SAS interface, etc. Therefore, the system of the present invention adopts a modular design, each of which is connected by a hot-swappable plug-in connector, and some modules can be replaced quickly and conveniently without power failure, thereby improving maintenance efficiency.

[0049] Among them, the multiple functional modules of the system of the present invention include:

[0050] Programmable PLC main controller, control module, data acquisition module, communication module, storage module, liquid crystal interactive display module, power management module; the control module includes a command controller, a temperature controller, a humidity controller, and an alarm controller; the data acquisition module includes a temperature sensor and a humidity sensor; the communication module includes an RS485 communication function and an Ethernet communication function; the storage module includes a command storage function and a black box function; the liquid crystal interactive display module includes a liquid crystal display module, a keyboard and key module, and a power drive module; the power management module includes a power output module, a power distribution module, and a power safety management module; the temperature sensor is used to detect the coil (also known as winding), the iron core (also known as the iron core) and the external environment temperature of the transformer; the humidity sensor is used to detect the humidity of the external environment of the transformer; the system is also provided with a heat dissipation device and / or a dehumidification device. The above-mentioned functional modules can be fully integrated in the programmable PLC main controller, or partially integrated in the programmable PLC main controller.

[0051] The programmable PLC main controller is the core of the whole system. It is responsible for receiving data from various sensors, processing them according to the preset algorithm, and then issuing corresponding control instructions. The programmable PLC main controller has a built-in monitoring device, which can collect and process data in real time, and support maintenance and replacement without power failure of transformer equipment. Among them, the programmable PLC main controller adopts modular design, strong and weak electricity separation, avoids spatial crosstalk, has reliable electromagnetic compatibility and anti-interference performance, and has reliable EMC and EMI performance. The control module, data acquisition module, communication module, storage module, LCD interactive display module, power management module, heat dissipation device and / or dehumidification device are all connected to the programmable PLC main controller.

[0052] When working, the programmable PLC main controller monitors the temperature and humidity of the transformer in real time through the temperature sensor and the humidity sensor respectively. When the temperature or humidity of the transformer exceeds the set threshold, the programmable PLC main controller will promptly drive the heat dissipation device and / or dehumidification device and other functional modules to work, dissipate heat and / or dehumidify the transformer; when the temperature or humidity of the transformer is lower than the set threshold, the programmable PLC main controller will promptly control the heat dissipation device and / or dehumidification device and other functional modules to stop working, thereby achieving efficient and energy-saving self-regulating temperature and humidity. The system's programmable PLC main controller transmits real-time monitoring data to the remote monitoring center through the communication module. When the temperature or humidity of the transformer exceeds the set threshold, an alarm instruction can be sent to the remote monitoring center in time to remind the operation and maintenance personnel to handle it in time. Of course, the programmable PLC main controller of this embodiment can also integrate functions such as fan overload protection, fan fault alarm, clock chip, and historical data storage with time stamp (black box function).

[0053] Preferably, the system of the present invention is particularly suitable for three-phase transformers, and the specific embodiments are as follows:

[0054] like Figure 2 As shown, the temperature sensor 200 of this embodiment is a five-way temperature sensor, and the five-way temperature sensors all adopt PT100 temperature sensors, and the five-way temperature sensors include: a first-phase coil temperature sensor 201, used to detect the first-phase coil temperature of the transformer; a second-phase coil temperature sensor 202, used to detect the second-phase coil temperature of the transformer; a third-phase coil temperature sensor 203, used to detect the third-phase coil temperature of the transformer; a core temperature sensor 204, used to detect the core temperature of the transformer; an ambient temperature sensor 205, used to detect the external ambient temperature of the transformer.

[0055] The heat dissipation device and / or dehumidification device includes: a DC brushless cross-flow heat dissipation fan 400, which is used to dissipate heat and dehumidify the transformer; and a ceramic heating plate 302, which is used to dehumidify the transformer.

[0056] A programmable digital potentiometer 401 is connected between the DC brushless cross-flow cooling fan 400 and the programmable PLC main controller 100. The programmable digital potentiometer 401 is a CMOS programmable digital potentiometer, which is used to adjust the speed of the DC brushless cross-flow cooling fan 400. The system of this embodiment is also provided with an alarm 700, which is connected to the programmable PLC main controller 100.

[0057] The functional modules of the present embodiment are fully or partially integrated in the programmable PLC main controller 100. Among them, the programmable PLC main controller 100 of the present embodiment integrates the instruction controller and the temperature controller, so that the programmable PLC main controller 100 can control the programmable digital potentiometer 401 to output instructions according to the collected data of the five-way temperature sensor, thereby controlling the start, shutdown, and precise output power (i.e., speed) of the DC brushless cross-flow cooling fan 400. A humidity controller 301 is provided between the programmable PLC main controller 100 of the present embodiment and the humidity sensor 300, so that the programmable PLC main controller 100 can output instructions through the humidity controller 301 according to the collected data of the humidity sensor 300, thereby controlling the ceramic heating plate 302 to start, shut down, and output heating power. The programmable PLC main controller 100 of the present embodiment also integrates an alarm controller, so that the programmable PLC main controller 100 can output instructions as needed, thereby controlling the alarm 700 to emit alarm signals such as sound and light.

[0058] The communication module of this embodiment is a remote communication module 500, which integrates RS485 communication function and Ethernet communication function. The RS485 communication function adopts the international open standard protocol Modbus-RTU, and the Ethernet communication function adopts the international open standard protocol Modbus-TCP.

[0059] The liquid crystal interactive display module 600 of this embodiment is used for display and parameter setting. The liquid crystal interactive display module 600 is connected to the programmable PLC main controller 100. Among them, the liquid crystal interactive display module 600 includes an OLED liquid crystal display panel for display and physical buttons for setting parameters and system operations. The OLED liquid crystal display panel can display the temperature and humidity values ​​of each phase coil of the transformer and the external environment in a cyclic manner. The liquid crystal interactive display module 600 can also have display functions such as setting alarms, tripping contacts, instrument fault self-test and alarm faults, and temperature sensor fault prompts. Among them, since modules such as the power management module and the storage module belong to the prior art, Figure 2 Not drawn in.

[0060] like Figure 3 As shown, the operation control process of the system in this embodiment is:

[0061] The first step is to turn on the power of the system.

[0062] In the second step, the programmable PLC main controller starts self-checking and monitoring. Then it determines whether the system is normal. If the system is abnormal, it returns to the second step, and the programmable PLC main controller performs self-checking and monitoring again. If the system is normal, the temperature and humidity signals of the transformer are obtained through the temperature sensor and humidity sensor.

[0063] The third step is to determine whether the temperature and humidity exceed the set threshold of the system; if they do not exceed the set threshold of the system, return to the second step or directly jump to the end of the last step; if they exceed the set threshold of the system, start the DC brushless cross-flow cooling fan and / or ceramic heating plate to dissipate heat and / or dehumidify;

[0064] The fourth step is to control the wind speed, power and other parameters of the DC brushless cross-flow cooling fan after starting the DC brushless cross-flow cooling fan, so as to achieve efficient and energy-saving self-regulating temperature and humidity.

[0065] More specifically, if Figure 4 As shown, the temperature adjustment method of the system in this embodiment is:

[0066] When the temperatures detected by the five temperature sensors are all less than 90°C, the programmable PLC main controller outputs instructions to control the DC brushless cross-flow cooling fan to turn off, and no heat dissipation is required;

[0067] When the temperature detected by one of the five temperature sensors is greater than or equal to 90°C, the programmable PLC main controller outputs an instruction to control the DC brushless cross-flow cooling fan to start running and dissipate heat, and the programmable PLC main controller uses the following formula to determine the operating output power percentage of the DC brushless cross-flow cooling fan:

[0068] P = 1 / 60 × (T-90)

[0069] Where P is the operating output power percentage of the DC brushless cross-flow cooling fan, in %, and T is the highest temperature detected by the five temperature sensors, in ℃; for example, if the temperature T is 96℃, then according to the formula, the operating output power P of the DC brushless cross-flow cooling fan should be 10%;

[0070] When the temperature detected by one of the five temperature sensors is greater than or equal to 130°C, the programmable PLC main controller starts the alarm program through the alarm controller, for example: output instructions to control the alarm to emit sound and light and other alarm signals;

[0071] When the temperature detected by one of the five temperature sensors is greater than or equal to 150°C, the programmable PLC main controller outputs instructions to control the DC brushless cross-flow cooling fan to operate at 100% output power, and the programmable PLC main controller sends a remote alarm instruction through the remote communication module;

[0072] When the temperature detected by one of the five temperature sensors is greater than or equal to 180°C, the programmable PLC main controller sends a remote alarm command and an over-temperature trip command through the communication module;

[0073] Through the linear relationship, the system can accurately adjust the operating output power percentage of the DC brushless cross-flow cooling fan according to the real-time monitored temperature value, ensuring that appropriate cooling effects can be provided under different temperature conditions; dynamically adjust the operating output power percentage of the DC brushless cross-flow cooling fan according to temperature changes, avoiding energy waste caused by constant high-power operation and improving the energy efficiency of the system; reasonable power output can reduce the wear of the DC brushless cross-flow cooling fan and extend its service life; the linear relationship enables the system to respond quickly to temperature changes, start or adjust cooling measures in time, and ensure the safe operation of the transformer.

[0074] The humidity adjustment method of the system in this embodiment is:

[0075] When the humidity sensor detects that the relative humidity is less than 80%, the programmable PLC main controller outputs instructions to control the DC brushless cross-flow cooling fan and the ceramic heating plate to be turned off, and dehumidification is not required;

[0076] When the humidity sensor detects that the relative humidity is greater than or equal to 80%, the programmable PLC main controller outputs instructions to control the DC brushless cross-flow cooling fan to start running and the ceramic heating plate to generate heat for dehumidification.

[0077] The programmable PLC main controller monitors the temperature and humidity of the transformer in real time through a temperature sensor and a humidity sensor, respectively, and the cycle monitoring time is 0.5 hours.

[0078] The specific structure of the system in this embodiment is as follows:

[0079] like Figure 5 As shown, Figure 5The diagram is a parameter setting and wiring panel diagram for the programmable PLC main controller (including monitoring device) and the LCD interactive display module. The LCD interactive display module is used for display and parameter setting. Among them, the LCD interactive display module includes an OLED LCD display panel for display and physical buttons for setting parameters and system operation. The OLED LCD display panel can display the temperature and humidity values ​​of each phase coil of the transformer and the external environment in a cyclic manner. The LCD interactive display module can also have the functions of setting alarms, tripping contacts, instrument fault self-test, alarm faults, and temperature sensor fault prompts. At the same time, the LCD interactive display module can realize a friendly human-computer interaction interface, which is convenient for users to perform standard settings and system operations of parameters such as temperature thresholds, humidity thresholds, and alarm thresholds, and help users understand the parameter setting method of the main controller module and the wiring method to the outside to ensure correct installation and use. The basic power supply terminal is connected to the external power supply, usually including the positive pole (+), the negative pole (-) and the ground wire (GND). The sensor terminal is used to connect the temperature sensor PT100 and the humidity sensor. The control output terminals are used to connect digital potentiometers, alarms and DC cooling fans, various control passive alarm signals (humidity alarm, fault alarm, high temperature alarm, over-temperature alarm, etc.), 485 communication interfaces and Ethernet interface communication terminals, etc.

[0080] like Figures 6 to 8 As shown, the specific structure of the system in this embodiment is:

[0081] An aluminum alloy protective cover 800 is also provided, and the aluminum alloy protective cover 800 is installed on the periphery of the transformer 900. The outer side of the aluminum alloy protective cover 800 is provided with standardized interfaces corresponding to various functional modules, through which maintenance personnel can manually disassemble or install corresponding modules. Of course, according to actual needs, the system of the present invention can also be installed in a power distribution room. All key modules of the system of this embodiment, such as: programmable PLC main controller 100, temperature sensor 200, humidity sensor 300, humidity controller 301, ceramic heating plate 302, DC brushless cross-flow cooling fan 400, programmable digital potentiometer 401, remote communication module 500, liquid crystal interactive display module 600, alarm 700, aluminum alloy protective cover 800, transformer 900, etc., all adopt standardized interface design, and the program and settings have been debugged in the factory. The external installation is a standard snap-on structure that is inserted and locked in a limit position. The installation site supports replacement and maintenance without using external tools, that is, maintenance personnel can replace the faulty module through simple plug-in and pull-out operations without power failure, which greatly shortens the maintenance time and improves the availability of the system.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A modular control system for transformers with high efficiency, energy saving and self-adjusting temperature and humidity, the system comprises multiple functional modules, characterized in that: The functional modules are connected via hot-swappable plug-in connectors; The multiple functional modules include: a programmable PLC main controller, a control module, a data acquisition module, a communication module, a storage module, a liquid crystal interactive display module, and a power management module; The control module includes a command controller, a temperature controller, a humidity controller, and an alarm controller; The data acquisition module includes a temperature sensor and a humidity sensor; The communication module includes RS485 communication function and Ethernet communication function; The storage module includes an instruction storage function and a black box function; The liquid crystal interactive display module includes a liquid crystal display module, a keyboard and key module, and a power drive module; The power management module includes a power output module, a power distribution module, and a power safety management module; The temperature sensor is used to detect the coil, core and external environment temperature of the transformer; The humidity sensor is used to detect the humidity of the external environment of the transformer; The system is also provided with a heat dissipation device and / or a dehumidification device.

2. The modular control system for the transformer with high efficiency, energy saving and self-adjusting temperature and humidity according to claim 1 is characterized in that: The temperature sensor is a five-way temperature sensor, each of which adopts a PT100 temperature sensor, and the five-way temperature sensor includes: A first phase coil temperature sensor, used to detect the temperature of the first phase coil of the transformer; A second phase coil temperature sensor, used for detecting the temperature of the second phase coil of the transformer; A third-phase coil temperature sensor, used to detect the temperature of the third-phase coil of the transformer; Core temperature sensor, used to detect the core temperature of the transformer; The ambient temperature sensor is used to detect the external ambient temperature of the transformer.

3. The modular control system for transformer with high efficiency, energy saving and self-adjusting temperature and humidity according to claim 2, characterized in that: The heat dissipation device and / or dehumidification device comprises: DC brushless cross-flow cooling fan, used to dissipate heat and / or dehumidify the transformer; Ceramic heating plate, used to dehumidify the transformer.

4. The modular control system for the transformer with high efficiency, energy saving and self-adjusting temperature and humidity according to claim 3 is characterized by: When the temperatures detected by the five temperature sensors are all less than 90°C, the programmable PLC main controller outputs instructions to control the DC brushless cross-flow cooling fan to turn off, and no heat dissipation is required; When the temperature detected by one of the five temperature sensors is greater than or equal to 90°C, the programmable PLC main controller outputs an instruction to control the DC brushless cross-flow cooling fan to start running and dissipate heat, and the programmable PLC main controller uses the following formula to determine the operating output power percentage of the DC brushless cross-flow cooling fan: P = 1 / 60 × (T-90) Wherein P is the operating output power percentage of the DC brushless cross-flow cooling fan, in %, and T is the highest temperature detected by the five temperature sensors, in °C; When the temperature detected by one of the five temperature sensors is greater than or equal to 130° C., the programmable PLC main controller starts an alarm program through the alarm controller; When the temperature detected by one of the five temperature sensors is greater than or equal to 150° C., the programmable PLC main controller outputs an instruction to control the DC brushless cross-flow cooling fan to operate at 100% output power, and at the same time, the programmable PLC main controller sends a remote alarm instruction through the communication module; When the temperature detected by one of the five temperature sensors is greater than or equal to 180° C., the programmable PLC main controller sends a remote alarm instruction and an over-temperature trip instruction through the communication module.

5. The modular control system for transformer with high efficiency, energy saving and self-adjusting temperature and humidity according to claim 3 is characterized by: When the humidity sensor detects that the relative humidity is less than 80%, the programmable PLC main controller outputs instructions to control the DC brushless cross-flow cooling fan and the ceramic heating plate to be turned off, and no dehumidification is required; When the humidity sensor detects that the relative humidity is greater than or equal to 80%, the programmable PLC main controller outputs instructions to control the DC brushless cross-flow cooling fan to start running and the ceramic heating plate to generate heat for dehumidification.

6. The modular control system for the transformer with high efficiency, energy saving and self-adjusting temperature and humidity according to claim 4 or 5, characterized in that: The programmable PLC main controller monitors the temperature and humidity of the transformer in real time through the temperature sensor and the humidity sensor, respectively, and the cycle monitoring period is 0.5 hours.

7. The modular control system for transformer with high efficiency, energy saving and self-adjusting temperature and humidity according to claim 6, characterized in that: A programmable digital potentiometer is connected between the DC brushless cross-flow cooling fan and the programmable PLC main controller. The programmable digital potentiometer is a CMOS programmable digital potentiometer, and the CMOS programmable digital potentiometer is used to adjust the rotation speed of the DC brushless cross-flow cooling fan.

8. The modular control system for transformer with high efficiency, energy saving and self-adjusting temperature and humidity according to claim 7, characterized in that: The liquid crystal display module of the liquid crystal interactive display module is an OLED liquid crystal display panel.

9. The modular control system for transformer with high efficiency, energy saving and self-adjusting temperature and humidity according to claim 8, characterized in that: The system is also provided with an alarm, which is connected to the programmable PLC main controller; when the temperature or humidity of the transformer exceeds a set threshold, the alarm sends out an audible and visual alarm signal.

10. The modular control system for transformer with high efficiency, energy saving and self-adjusting temperature and humidity according to claim 9, characterized in that: The system is also provided with an aluminum alloy protective cover, which is installed on the periphery of the transformer. The outer side of the aluminum alloy protective cover is provided with standardized interfaces corresponding to various functional modules. Through the standardized interfaces, maintenance personnel can disassemble or install the corresponding modules by hand.

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