Transformer substation screen cabinet temperature and humidity control method and electronic equipment

Abstract

The invention provides a transformer substation screen cabinet temperature and humidity control method and electronic equipment, and relates to the technical field of power electronic equipment. The method comprises the following steps: acquiring the temperature and humidity in the cabinet of the transformer substation screen cabinet in real time; determining a temperature weight and a humidity weight according to the temperature in the cabinet and the humidity in the cabinet; and controlling a heater, a dehumidifier and an exhaust fan according to the temperature weight, the humidity weight and the temperature in the cabinet. According to the method, the temperature and the humidity in the cabinet are comprehensively considered, temperature and humidity scenes are accurately matched through dynamic allocation of'temperature weight + humidity weight ', automatic and accurate control over the temperature and the humidity in the screen cabinet can be achieved, the environment in the cabinet is always kept within a suitable range required by safe and stable operation of equipment, and safe and stable operation of the equipment in the cabinet is ensured.

Description

Technical Field

[0001] This invention relates to the field of power electronic equipment technology, and in particular to a method and electronic equipment for temperature and humidity control of substation cabinets. Background Technology

[0002] Some substation cabinets need to be installed outdoors, directly exposed to the natural environment. These cabinets usually contain precision electrical equipment such as relays and terminal blocks, which are extremely sensitive to environmental temperature and humidity: (1) High temperatures in summer may cause the equipment to overheat, affecting insulation performance and service life, and even causing malfunctions; (2) Low temperatures in winter may cause poor contact and other problems due to cold contraction of internal components; (3) Rain, snow, and humid weather will cause the humidity inside the cabinet to rise, which can easily cause condensation and corrosion, resulting in short circuits or leakage. Therefore, it is necessary to perform ventilation, dehumidification, and heating operations on the cabinets to avoid cumulative or sudden damage to the precision electrical equipment inside the cabinets caused by abnormal temperature and humidity.

[0003] In existing technologies, temperature and humidity inside the enclosure are typically regulated through manual inspection and adjustment (such as opening the cabinet door for ventilation, temporarily placing a dehumidifier or heater). This is not only inefficient and slow to respond, but also difficult to respond to drastic dynamic changes in the outdoor environment in real time. This passive management is often only discovered after the equipment has been damaged or the risk of failure has increased, and it cannot effectively prevent cumulative or sudden damage to precision electrical equipment caused by abnormal temperature and humidity. Summary of the Invention

[0004] This invention provides a method and electronic device for controlling temperature and humidity in substation cabinets, in order to solve the problems of low efficiency, slow response, and inability to effectively prevent damage caused by abnormal temperature and humidity in the prior art through manual inspection and adjustment.

[0005] In a first aspect, embodiments of the present invention provide a method for controlling the temperature and humidity of a substation cabinet, comprising: Real-time acquisition of the internal temperature and humidity of the substation cabinets; The weighting of temperature and humidity is determined based on the temperature and humidity inside the cabinet. The heater, dehumidifier, and exhaust fan are controlled based on temperature weighting, humidity weighting, and the temperature inside the cabinet.

[0006] In a second aspect, embodiments of the present invention provide an electronic device, including a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the substation panel temperature and humidity control method as described in the first aspect or any possible implementation of the first aspect.

[0007] This invention provides a method and electronic device for controlling temperature and humidity in substation cabinets. The method includes: real-time acquisition of the internal temperature and humidity of the substation cabinet; determining temperature and humidity weights based on the internal temperature and humidity; and controlling a heater, dehumidifier, and exhaust fan based on the temperature weights, humidity weights, and internal temperature. This application comprehensively considers both internal temperature and humidity, and through the dynamic allocation of "temperature weight + humidity weight," accurately matches the temperature and humidity scenario, enabling automatic and precise control of the internal temperature and humidity. This ensures that the internal environment is always maintained within the suitable range required for the safe and stable operation of the equipment, guaranteeing the safe and stable operation of the equipment within the cabinet. Attached Figure Description

[0008] Figure 1 This is a flowchart illustrating the implementation of a substation panel temperature and humidity control method provided in an embodiment of the present invention. Figure 2 This is a schematic diagram of the structure of the substation cabinet temperature and humidity control device provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of an electronic device provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the byte frame format provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the control panel of the electronic device provided in an embodiment of the present invention. Detailed Implementation

[0009] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0010] When the temperature and humidity inside the outdoor cabinet change, it mainly affects the reliability, lifespan, and electrical performance of the relays by altering the internal material properties and electrical environment. The core impacts and mechanisms are as follows: 1. The effect of temperature: High temperature (exceeding the rated operating limit, typically >40℃): 1) Accelerates the aging of coil insulation material, leading to a decrease in insulation performance, which may cause a short circuit in the coil and directly burn out the relay.

[0011] 2) It accelerates the oxidation rate of the contact metal, increases the contact resistance, causes overheating and contact welding failure, and leads to the relay "sticking" and being unable to disconnect.

[0012] 3) Reducing the permeability of magnetic materials weakens the electromagnetic attraction, which may cause the relay to not engage properly or fail to engage normally, leading to control circuit failure.

[0013] Low temperature (below the rated operating limit, typically < -5°C): 1) It causes the grease inside the relay (such as contact grease and bearing grease) to solidify, increasing mechanical resistance and causing the contacts to be delayed or stuck.

[0014] 2) It causes plastic, rubber and other structural parts to become brittle. Long-term low temperature may cause the parts to crack, damage the sealing performance of the relay, and further aggravate the impact of other environmental factors.

[0015] 2. The effect of humidity: High humidity (relative humidity > 80%, especially with condensation): 1) Moisture can cause the internal metal parts of the relay (coil, contacts, terminals) to become damp and corrode, increasing contact resistance and causing a decrease in insulation resistance, which may lead to leakage or short circuit faults.

[0016] 2) Condensation will directly adhere to the contact surface, disrupting the electrical conduction between contacts, causing "contact jitter" or poor contact, resulting in false triggering or interruption of control signals.

[0017] 3) It accelerates the moisture absorption and aging of non-metallic materials (such as insulating substrates), reduces their insulation strength, increases the risk of creepage (current leakage along the insulation surface), and affects the long-term stability of relays.

[0018] For outdoor power cabinets, in order to improve the reliability of relay operation, extend service life and enhance their electrical performance, it is necessary to automatically control the temperature and humidity of the power cabinet.

[0019] See Figure 1 The flowchart illustrating the implementation of the substation cabinet temperature and humidity control method provided in this embodiment of the invention is shown below: The above-mentioned substation panel temperature and humidity control methods include: S101: Real-time acquisition of the internal temperature and humidity of the substation panel cabinet; The control strategy of this application is based on the temperature and humidity inside the substation cabinet collected by the substation cabinet.

[0020] Specifically, temperature and humidity sensors can be installed inside the cabinet to collect real-time data on the temperature and humidity inside the cabinet.

[0021] S102: Determine the temperature weight and humidity weight based on the temperature and humidity inside the cabinet; In low-temperature environments, preventing condensation (humidity control) is the primary task; in high-temperature environments, preventing equipment overheating (temperature control) is the primary task.

[0022] Meanwhile, considering that the impact of a 1°C change in temperature and a 1%RH change in humidity on mechanical equipment are completely different under different environments, a more precise quantitative assessment of temperature and humidity changes is needed.

[0023] Regarding temperature, when the temperature inside the cabinet is close to the maximum allowable temperature Tmax of the equipment (such as relays), if the temperature rises further by 1°C, there may be a risk of overheating of the equipment. In this case, the weight set needs to be more sensitive to temperature changes.

[0024] Regarding humidity: When the humidity inside the cabinet exceeds a certain critical value H3, a change of 1%RH may accelerate the occurrence of condensation. The weighting needs to be dynamically adjusted according to the humidity range.

[0025] Therefore, in order to accurately match the temperature and humidity scenario, this application determines the temperature weight and humidity weight based on the temperature and humidity inside the cabinet, and makes precise adjustments to the temperature and humidity.

[0026] Specifically, in one possible implementation, S102 may include: S1021: Obtain temperature correction factor and humidity correction factor; S1022: Determine the temperature weight based on the temperature correction factor, humidity correction factor, cabinet temperature, and cabinet humidity; To balance the impact of a 1°C change in temperature versus a 1%RH change in humidity, this application introduces a temperature correction factor and a humidity correction factor, combining temperature and humidity to obtain temperature and humidity weights, adapting to different operating environments and actual needs, and improving the accuracy and adaptability of the control strategy.

[0027] In one possible implementation, S1022 may include: 1. Determine the temperature weight based on the temperature correction factor, humidity correction factor, cabinet temperature and humidity, and the first formula. The first formula may include:

[0028] in, Temperature weighting, The temperature inside the cabinet. This is a temperature correction factor. The humidity inside the cabinet, This is the humidity correction factor.

[0029] This application quantifies the priority of temperature in environmental control decisions by weighting "temperature × temperature correction factor" and "humidity × humidity correction factor". For example, the higher the temperature at a given moment, the greater the temperature weight. The closer the value is to 1, the more the system will prioritize temperature-based control of each device. Higher humidity levels will reduce the weighting of temperature. The smaller the humidity level, the more the system will prioritize controlling the operation of each device based on humidity.

[0030] Furthermore, the same method can be used to determine the humidity weight.

[0031] In one possible implementation, S1023 may include: 1. Determine the humidity weight based on the temperature correction factor, humidity correction factor, cabinet temperature and humidity, and the second formula. The second formula may include:

[0032] in, Humidity weighting, The temperature inside the cabinet. This is a temperature correction factor. The humidity inside the cabinet, This is the humidity correction factor.

[0033] For example, temperature correction factor The humidity correction factor can be 0.8. It can be 0.2.

[0034] Specifically, it can also be set according to actual application needs. and For example, during summer / daytime (6-20 AM): temperature has a more significant impact on equipment. It can be 0.9. It can be 0.1; the specific value can be determined based on the actual situation.

[0035] Considering that the impact on equipment operation increases when temperature and humidity reach critical levels, this application can further modify the weighting of temperature and humidity.

[0036] In one possible implementation, prior to S103, the above method may further include: S104: Determine the temperature range correction factor and humidity range correction factor based on the temperature and humidity inside the cabinet; In one possible implementation, S104 may include: S1041: If the temperature inside the cabinet is less than the minimum temperature threshold, the temperature range correction factor is determined to be the first temperature factor (0.7), and the humidity range correction factor is determined to be the third humidity factor (1.3). When the temperature is below the low-temperature threshold (minimum temperature threshold), condensation may occur, leading to a decrease in insulation resistance and causing serious faults such as short circuits and leakage. Therefore, humidity control should have a higher priority. Thus, the weight of temperature should be reduced, and the weight of humidity should be increased.

[0037] S1042: If the temperature inside the cabinet is greater than the maximum temperature threshold, the temperature range correction factor is determined to be the third temperature factor (1.3), and the humidity range correction factor is determined to be the first humidity factor (0.7). When the temperature exceeds the high-temperature threshold (maximum temperature threshold), excessive heat can cause equipment failure in a short period of time. Compared to humidity, high temperature causes more direct and rapid damage to electrical equipment, therefore temperature control should have a higher priority. Thus, increasing the temperature weighting minimizes the probability of equipment failure caused by overheating.

[0038] S1043: If the temperature inside the cabinet is not less than the minimum temperature threshold and not greater than the maximum temperature threshold, and the humidity inside the cabinet is not less than the maximum humidity threshold (80%), then the temperature range correction coefficient is determined to be the second temperature coefficient (1.0), and the humidity range correction coefficient is determined to be the third humidity coefficient (1.3). S1044: If the temperature inside the cabinet is not less than the minimum temperature threshold and not greater than the maximum temperature threshold, and the humidity inside the cabinet is less than the maximum humidity threshold (80%) and greater than the minimum humidity threshold (60%), then the temperature range correction coefficient is determined to be the second temperature coefficient (1.0), and the humidity range correction coefficient is determined to be the second humidity coefficient (1.0). S1045: If the temperature inside the cabinet is not less than the minimum temperature threshold and not greater than the maximum temperature threshold, and the humidity inside the cabinet is not greater than the minimum humidity threshold (60%), then the temperature range correction coefficient is determined to be the second temperature coefficient (1.0), and the humidity range correction coefficient is determined to be the first humidity coefficient (0.7). Among them, the first temperature coefficient is less than the second temperature coefficient, and the second temperature coefficient is less than the third temperature coefficient; the first humidity coefficient is less than the second humidity coefficient, and the second humidity coefficient is less than the third humidity coefficient.

[0039] If the temperature is normal but the humidity is too high, the humidity weight will be adjusted according to the humidity level, with higher humidity resulting in a higher weight.

[0040] The above control strategy ensures that the system can reasonably allocate control priorities under different environmental conditions, thereby achieving precise control of the temperature and humidity of the cabinet.

[0041] In one possible implementation, the first temperature coefficient is 0.7, the second temperature coefficient is 1.0, and the third temperature coefficient is 1.3; The first humidity coefficient is 0.7, the second humidity coefficient is 1.0, and the third humidity coefficient is 1.3.

[0042] Each coefficient can also be set according to actual application needs, and no specific restrictions are made here.

[0043] S105: Multiply the temperature range correction coefficient by the temperature weight to obtain the new temperature weight; S106: Multiply the humidity range correction factor by the humidity weight to obtain the new humidity weight; S107: Use the new temperature weight as the current temperature weight, use the new humidity weight as the current humidity weight, and jump to step S103 to continue execution.

[0044] By correcting the temperature and humidity weights using temperature and humidity range correction coefficients, the system can respond more intelligently to temperature and humidity changes in different ranges, especially to situations approaching dangerous thresholds, ensuring that the system can prioritize handling more urgent environmental factors in critical states, thereby improving the safety and reliability of the entire control system.

[0045] S103: Control the heater, dehumidifier and exhaust fan according to temperature weight, humidity weight and cabinet temperature.

[0046] The heater is used for heating, the dehumidifier for dehumidifying, and the exhaust fan assists the heater and dehumidifier for cooling and dehumidifying. This application controls each device based on temperature weighting, humidity weighting, and the internal temperature of the cabinet, achieving precise adjustment of the internal temperature and humidity, making the control more suitable for actual application scenarios.

[0047] In one possible implementation, S103 may include: S1031: If the temperature inside the cabinet is lower than the minimum temperature threshold, the heater and dehumidifier will be activated. When the temperature inside the cabinet is too low, heating and dehumidification are performed simultaneously without considering the weighting of temperature and humidity, thus solving the problem of high humidity that may accompany low temperatures.

[0048] S1032: If the temperature inside the cabinet exceeds the maximum temperature threshold, control the exhaust fan to exhaust air at high speed. When the temperature exceeds the maximum threshold, forced cooling is activated, and the exhaust fan is started and runs at high speed to prioritize solving the high temperature problem.

[0049] S1033: If the temperature inside the cabinet is not less than the minimum temperature threshold and not greater than the maximum temperature threshold, and the temperature weight is greater than the humidity weight, then the heater, dehumidifier and exhaust fan will all be turned off. When the temperature is normal and the temperature weight is greater than the humidity weight, all equipment is turned off without intervention.

[0050] S1034: If the temperature inside the cabinet is not less than the minimum temperature threshold and not greater than the maximum temperature threshold, and the temperature weight is less than the humidity weight, then control the dehumidifier to start and control the exhaust fan to exhaust air at low speed. When the temperature is normal and the temperature weight is less than the humidity weight, humidity has a higher priority. Start the dehumidifier and run the fan at low speed to enhance the dehumidification effect.

[0051] S1035: If the temperature inside the cabinet is not less than the minimum temperature threshold and not greater than the maximum temperature threshold, and the temperature weight is equal to the humidity weight, then control the exhaust fan to turn off and control the dehumidifier to start.

[0052] When the temperature is normal and the weights are equal, start the dehumidifier but turn off the fan to meet basic dehumidification needs and reduce energy consumption.

[0053] This application takes into account both the temperature inside the cabinet and the weighting of temperature and humidity to precisely control the equipment and achieve a balance between environmental safety and energy consumption.

[0054] This application dynamically identifies the main contradictions in the "temperature and humidity combination risk" and shifts the control focus to the more pressing environmental risks, which meets the actual needs of on-site operation and maintenance and achieves precise control of temperature and humidity.

[0055] In one possible implementation, the above method may further include: S108: Receive rain signal outside the cabinet; S109: If the rain signal outside the cabinet indicates rain, then control the exhaust fan to turn off.

[0056] To prevent the risk of rainwater entering the cabinet due to the exhaust fan being turned on, which could cause short circuits in the internal equipment, this application forcibly shuts down the exhaust fan when rain is detected, ensuring the safety of the equipment inside the cabinet.

[0057] In one possible implementation, the above method may further include: S1010: Repeat steps S101 to S103 at preset time intervals.

[0058] This application recalculates the temperature and humidity weights at preset intervals (e.g., 30 minutes) and dynamically adjusts the strategy. For example, when the humidity rises slowly but does not exceed the limit, the dehumidifier is activated slightly in advance for preventive dehumidification.

[0059] Furthermore, in this application, the heater and the exhaust fan cannot be turned on simultaneously to prevent energy waste.

[0060] Dehumidifiers and exhaust fans will start 10-15 seconds after the triggering conditions are met to avoid frequent operation due to instantaneous fluctuations.

[0061] This application also includes an anomaly alert policy. Details are as follows: 1. Temperature and humidity exceeding limits alarm Level: Level 1 Alert (Warning) condition: T1 > Tmax + 2℃ or T1 < -2℃, lasting for more than 3 minutes.

[0062] H1 > H3 + 5%RH, lasting for more than 5 minutes.

[0063] T1 and H1 are the cabinet temperature and humidity, respectively; Tmax and Tmin are the maximum and minimum temperature thresholds, respectively; and H3 is the critical humidity.

[0064] action: (1) An alarm message pops up in the auxiliary control background, and the "temperature / humidity value" of that interval is highlighted in the auxiliary control temperature and humidity control screen.

[0065] (2) Record the time, duration and extreme value of exceeding the limit for analysis report.

[0066] 2. Alarm for sudden temperature and humidity changes (risk of overheating at electrical connection points or internal short circuit) Level: Level 2 Alarm (Critical) Principle: Calculate the rate of change (gradient) of temperature and humidity per unit time.

[0067] condition: Temperature gradient alarm: |ΔT / Δt|>5℃ / minute (e.g., rising from 30℃ to above 35℃ in 1 minute).

[0068] Humidity gradient alarm: |ΔH / Δt|>10%RH / minute.

[0069] ΔT / Δt and ΔH / Δt represent the changes in temperature and humidity per unit time, respectively.

[0070] Note: Short-term sudden changes caused by the normal operation of actuators (such as heater startup) need to be excluded.

[0071] action: (1) Immediately trigger the highest priority alarm.

[0072] (2) An alarm message pops up in the auxiliary control background, and the interval in the auxiliary control temperature and humidity control screen reports "fault" and notifies the relevant maintenance person in charge.

[0073] 3. Actuator fault / control failure alarm Level: Level 2 Alarm (Critical) Principle: Compare the "control commands" with the "environmental feedback results".

[0074] condition: Relay / heater malfunction: After the controller issues the "start heating" command, T1 does not show any upward trend within the predetermined time (e.g., 10 minutes) (ΔT<1℃).

[0075] Dehumidifier malfunction: After the controller issues the "start dehumidification" command, H1 does not show any decreasing trend within the predetermined time (e.g., 15 minutes) (ΔH<2% RH).

[0076] Exhaust fan malfunction: When heat dissipation is required (T1>Tmax) and the fan is started, the temperature difference between the inside and outside of the cabinet does not show a decreasing trend.

[0077] action: 1. An alarm message pops up in the auxiliary control backend.

[0078] 2. The alarm message should clearly indicate the actuator suspected of being faulty (e.g., "XX cabinet heater suspected of being damaged").

[0079] 3. Switch the control mode of the control cabinet from "automatic" to "manual" and report the defect.

[0080] All alarm events, control actions, and environmental data are uploaded to the auxiliary control system platform of the host computer.

[0081] By leveraging big data analytics, we continuously optimize thresholds (H3, Tmin, Tmax) and the sensitivity of mutation alarms, forming a closed loop of "monitoring-control-feedback-learning".

[0082] On the auxiliary control system platform, different colors are used to indicate the status of the control cabinet (green for normal, yellow for exceeding limits, and red for fault / sudden change).

[0083] Maintenance personnel can remotely and manually force the start / stop of any actuator for emergency handling or testing.

[0084] For a large amount of temperature and humidity data collected in outdoor cabinets, a dynamic optimal threshold prediction model is constructed. Since the relationship between features and targets may be complex and non-linear, and the amount of data is huge, a tree model (such as LightGBM) is used in the construction process. This model can efficiently process a large number of features and give the importance of features, and accurately determine the threshold during continuous training.

[0085] This application achieves precise and energy-saving environmental regulation through weighted multi-condition control, and realizes comprehensive and forward-looking alarms from "environmental anomaly" to "equipment failure" and then to "potential electrical accident", which greatly improves the safety and intelligence level of the cabinet operation.

[0086] It should be understood that the sequence number of each step in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0087] The following are device embodiments of the present invention. For details not described in detail, please refer to the corresponding method embodiments described above.

[0088] Figure 2 A schematic diagram of the substation cabinet temperature and humidity control device provided in an embodiment of the present invention is shown. For ease of explanation, only the parts related to the embodiment of the present invention are shown, and are described in detail below: like Figure 2 As shown, the temperature and humidity control device for substation cabinets includes: The parameter acquisition module 21 is used to acquire the internal temperature and humidity of the substation cabinet in real time. The weight determination module 22 is used to determine the temperature weight and humidity weight based on the temperature and humidity inside the cabinet. The control module 23 is used to control the heater, dehumidifier and exhaust fan according to the temperature weight, humidity weight and cabinet temperature.

[0089] In one possible implementation, the weight determination module 22 may include: Correction factor acquisition unit, used to acquire temperature correction factor and humidity correction factor; The first weighting calculation unit is used to determine the temperature weight based on the temperature correction factor, humidity correction factor, cabinet temperature and cabinet humidity. The second weighting calculation unit is used to determine the humidity weight based on the temperature correction factor, humidity correction factor, cabinet temperature, and cabinet humidity.

[0090] In one possible implementation, the first weight calculation unit can be specifically used for: The temperature weight is determined based on the temperature correction factor, humidity correction factor, cabinet temperature and cabinet humidity, combined with the first formula. The first formula may include:

[0091] in, Temperature weighting, The temperature inside the cabinet. This is a temperature correction factor. The humidity inside the cabinet, This is the humidity correction factor.

[0092] In one possible implementation, the second weight calculation unit can be specifically used for: The humidity weight is determined by combining the temperature correction factor, humidity correction factor, cabinet temperature and cabinet humidity with the second formula. The second formula may include:

[0093] in, Humidity weighting, The temperature inside the cabinet. This is a temperature correction factor. The humidity inside the cabinet, This is the humidity correction factor.

[0094] In one possible implementation, the above-described apparatus may further include: The correction factor determination module is used to determine the temperature range correction factor and the humidity range correction factor based on the temperature and humidity inside the cabinet. The temperature weight update module is used to multiply the temperature range correction coefficient by the temperature weight to obtain the new temperature weight. The humidity weight update module is used to multiply the humidity range correction coefficient by the humidity weight to obtain the new humidity weight; The jump module is used to set the new temperature weight as the current temperature weight, set the new humidity weight as the current humidity weight, and jump to the step of controlling the heater, dehumidifier and exhaust fan according to the temperature weight, humidity weight and cabinet temperature to continue execution.

[0095] In one possible implementation, the correction coefficient determination module can be specifically used for: 1. If the temperature inside the cabinet is less than the minimum temperature threshold, the temperature range correction factor is determined to be the first temperature factor (0.7), and the humidity range correction factor is determined to be the third humidity factor (1.3). 2. If the temperature inside the cabinet is greater than the maximum temperature threshold, the temperature range correction factor is determined to be the third temperature factor (1.3), and the humidity range correction factor is determined to be the first humidity factor (0.7). 3. If the temperature inside the cabinet is not less than the minimum temperature threshold and not greater than the maximum temperature threshold, and the humidity inside the cabinet is not less than the maximum humidity threshold (80%), then the temperature range correction coefficient is determined to be the second temperature coefficient (1.0), and the humidity range correction coefficient is determined to be the third humidity coefficient (1.3). 4. If the temperature inside the cabinet is not less than the minimum temperature threshold and not greater than the maximum temperature threshold, and the humidity inside the cabinet is less than the maximum humidity threshold (80%) and greater than the minimum humidity threshold (60%), then the temperature range correction coefficient is determined to be the second temperature coefficient (1.0), and the humidity range correction coefficient is determined to be the second humidity coefficient (1.0). 5. If the temperature inside the cabinet is not less than the minimum temperature threshold and not greater than the maximum temperature threshold, and the humidity inside the cabinet is not greater than the minimum humidity threshold (60%), then the temperature range correction coefficient is determined to be the second temperature coefficient (1.0), and the humidity range correction coefficient is determined to be the first humidity coefficient (0.7). Among them, the first temperature coefficient is less than the second temperature coefficient, and the second temperature coefficient is less than the third temperature coefficient; the first humidity coefficient is less than the second humidity coefficient, and the second humidity coefficient is less than the third humidity coefficient.

[0096] In one possible implementation, the first temperature coefficient is 0.7, the second temperature coefficient is 1.0, and the third temperature coefficient is 1.3; The first humidity coefficient is 0.7, the second humidity coefficient is 1.0, and the third humidity coefficient is 1.3.

[0097] In one possible implementation, the control module 23 may be specifically used for: 1. If the temperature inside the cabinet is lower than the minimum temperature threshold, the heater and dehumidifier will be activated. 2. If the temperature inside the cabinet exceeds the maximum temperature threshold, control the exhaust fan to exhaust air at high speed; 3. If the temperature inside the cabinet is not less than the minimum temperature threshold and not greater than the maximum temperature threshold, and the temperature weight is greater than the humidity weight, then the heater, dehumidifier and exhaust fan will all be turned off. 4. If the temperature inside the cabinet is not less than the minimum temperature threshold and not greater than the maximum temperature threshold, and the temperature weight is less than the humidity weight, then the dehumidifier will be started and the exhaust fan will be controlled to exhaust air at low speed. 5. If the temperature inside the cabinet is not less than the minimum temperature threshold and not greater than the maximum temperature threshold, and the temperature weight is equal to the humidity weight, then the exhaust fan will be turned off and the dehumidifier will be started.

[0098] In one possible implementation, the above-described apparatus may further include: Rain signal acquisition module, used to acquire rain signals outside the cabinet; The rainproof control module is used to shut down the exhaust fan if the rain signal outside the cabinet indicates rain.

[0099] Figure 3 This is a schematic diagram of an electronic device provided in an embodiment of the present invention. For example... Figure 3 As shown, the electronic device 3 of this embodiment includes a processor 30 and a memory 31. The memory 31 stores a computer program 32. When the processor 30 executes the computer program 32, it implements the steps in the various method embodiments described above. Alternatively, when the processor 30 executes the computer program 32, it implements the functions of each module / unit in the various device embodiments described above.

[0100] For example, computer program 32 may be divided into one or more modules / units, which are stored in memory 31 and executed by processor 30 to complete the present invention. The one or more modules / units may be a series of computer program instruction segments capable of performing a specific function, which describe the execution process of computer program 32 in electronic device 3.

[0101] Electronic device 3 may include, but is not limited to, processor 30 and memory 31. Those skilled in the art will understand that... Figure 3 This is merely an example of electronic device 3 and does not constitute a limitation on electronic device 3. It may include more or fewer components than shown, or combine certain components, or different components. For example, electronic device 3 may also include input / output devices, network access devices, buses, etc.

[0102] Electronic device 3 is also connected to a host computer for uploading relevant data. Specific parameters are as follows: 1) Connect to the main communication interface of the host computer, using a standard serial communication port and terminal blocks.

[0103] 2) The information transmission method is asynchronous, and the byte format is 1 start bit, 8 data bits, 1 stop bit, and no parity.

[0104] 3) Data transmission rates of 2400b / s, 4800b / s, 9600b / s, and 19200b / s are available, with 9600b / s being the default.

[0105] 4) Complies with MODUBS RTU protocol standards.

[0106] Detailed Explanation of MODBUS RTU Communication Protocol: (1) Basic rules of the protocol The following rules define the communication rules for devices in loop controllers and other serial communication loops.

[0107] 1) All communication loops should follow the master / slave configuration. In this configuration, data can be transferred between a master station (e.g., a PC) and multiple slave stations. No communication can begin from a slave station.

[0108] 2) The master station will initialize and control all information transmitted on the communication loop.

[0109] 3) Transmission on all loops is divided into two methods: A) Master / Slave Transfer B) From / Master Transfer 4) All communication on the loop is transmitted in the form of “information frames”.

[0110] If the main station or substation receives a message frame containing an unknown command, it will not respond. An "information frame" is a string of bytes (up to 255 bytes) consisting of a header and the encoded data to be sent, forming a standard asynchronous serial data. This communication method is also compatible with the RTU communication protocol.

[0111] (2) Description of information frame structure The composition of each information frame is shown in Table 1.

[0112] Table 1 Information Frame Composition Table

[0113] (3) Byte format Communication is asynchronous and transmitted in bytes. Each byte frame transmitted between the master station and the slave station is a 10-bit (without parity) serial data stream.

[0114] Byte frame format such as Figure 4 As shown.

[0115] (4) Command message format Reading data: The format for sending messages from the main site is shown in Table 2.

[0116] Table 2 Message Format Sent by Main Station

[0117] The return format is shown in Table 3.

[0118] Table 3 Return Message Format

[0119] (5) The internal message information of CA720X is shown in Table 4.

[0120] Table 4 CA720X Internal Message Information Format

[0121] Note: Each data point is represented by a two-byte integer, with the most significant byte first and the least significant byte last. For example: the range of signed integers is -32768 to 32767. Uploaded data must be divided by ten. Positive numbers range from hexadecimal 0x0000 to 0x7FFF, while negative numbers are transmitted using the two's complement representation of positive numbers, ranging from hexadecimal 0x8000 to 0xFFFF. For example, the humidity value uploaded is 0X0311 in hexadecimal, which corresponds to 785 in decimal, representing 78.5%.

[0122] The temperature reading is 0x00FF in hexadecimal, which corresponds to 255 in decimal, representing 25.5℃.

[0123] The temperature is uploaded as hexadecimal 0XFF9B, which corresponds to decimal 100 (0XFFFF-0XFF9B=0X64), representing -10.0℃.

[0124] (6) Network sampling timing In temperature and humidity sensors, the interval between each data reading by the host computer should be no less than 500ms, with a recommended value of 1s.

[0125] Figure 5 The device panel of electronic device 3 is shown, such as Figure 5 As shown: 1. Main technical parameters Operating voltage: AC / DC 85-265V Total power consumption: less than 2W Temperature display range: -20℃~80℃, accuracy: ±0.5℃ Humidity display range: 1~99%RH, accuracy: ±5% Load output: AC220 / 5A (resistive load), one active contact. 2. Installation method: Base-mounted (rail) installation: the controller is clipped onto a 35mm mounting rail.

[0126] For the sake of simplicity and clarity, only the above-described functional modules / units are used as examples. In practical applications, the functions described above can be assigned to different functional modules / units as needed. These modules / units can be implemented in hardware, software, or a combination of both.

[0127] In the above embodiments, the descriptions of each embodiment have their own emphasis. Parts not detailed or described in a particular embodiment can be referred to in the relevant descriptions of other embodiments. Unless otherwise specified or in conflict with logic, the terminology and / or descriptions between different embodiments are consistent and can be referenced interchangeably. Technical features in different embodiments can be combined to form new embodiments based on their inherent logical relationships.

[0128] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. A method for controlling temperature and humidity of a substation cubicle, characterized by, The method comprises the following steps: obtaining the temperature and humidity inside the cabinet of the transformer substation screen cabinet in real time; determining the temperature weight and humidity weight according to the temperature and humidity inside the cabinet; controlling the heater, dehumidifier and exhaust fan according to the temperature weight, humidity weight and temperature inside the cabinet.

2. The substation panel cabinet temperature and humidity control method of claim 1, wherein, The method for determining the temperature weight and humidity weight according to the temperature and humidity inside the cabinet comprises the following steps: obtaining the temperature correction factor and humidity correction factor; determining the temperature weight according to the temperature correction factor, humidity correction factor, temperature inside the cabinet and humidity inside the cabinet; determining the humidity weight according to the temperature correction factor, humidity correction factor, temperature inside the cabinet and humidity inside the cabinet.

3. The substation panel cabinet temperature and humidity control method of claim 2, wherein, The method for determining the temperature weight according to the temperature correction factor, humidity correction factor, temperature inside the cabinet and humidity inside the cabinet comprises the following steps: determining the temperature weight according to the temperature correction factor, humidity correction factor, temperature inside the cabinet and humidity inside the cabinet by combining a first formula; The first formula comprises: wherein, is the temperature weight, is the temperature inside the cabinet, is the temperature correction factor, is the humidity inside the cabinet, is the humidity correction factor.

4. The substation panel cabinet temperature and humidity control method of claim 2, wherein, The method for determining the humidity weight according to the temperature correction factor, humidity correction factor, temperature inside the cabinet and humidity inside the cabinet comprises the following steps: determining the humidity weight according to the temperature correction factor, humidity correction factor, temperature inside the cabinet and humidity inside the cabinet by combining a second formula; The second formula comprises: wherein, is the humidity weight, is the temperature inside the cabinet, is the temperature correction factor, is the humidity inside the cabinet, is the humidity correction factor.

5. The substation panel cabinet temperature and humidity control method according to any one of claims 1 to 4, characterized by, Before the step of controlling the heater, dehumidifier and exhaust fan according to the temperature weight, humidity weight and temperature inside the cabinet, the method further comprises the following steps: determining the temperature interval correction coefficient and humidity interval correction coefficient according to the temperature and humidity inside the cabinet; multiplying the temperature interval correction coefficient by the temperature weight to obtain a new temperature weight; multiplying the humidity interval correction coefficient by the humidity weight to obtain a new humidity weight; taking the new temperature weight as the current temperature weight and the new humidity weight as the current humidity weight, and jumping to the step of controlling the heater, dehumidifier and exhaust fan according to the temperature weight, humidity weight and temperature inside the cabinet for continuous execution.

6. The substation panel cabinet temperature and humidity control method of claim 5, wherein, The method for determining the temperature interval correction coefficient and humidity interval correction coefficient according to the temperature and humidity inside the cabinet comprises the following steps: if the temperature inside the cabinet is less than a minimum temperature threshold, determining the temperature interval correction coefficient as a first temperature coefficient (0.7) and the humidity interval correction coefficient as a third humidity coefficient (1.3); if the temperature inside the cabinet is greater than a maximum temperature threshold, determining the temperature interval correction coefficient as a third temperature coefficient (1.3) and the humidity interval correction coefficient as a first humidity coefficient (0.7); if the temperature inside the cabinet is not less than the minimum temperature threshold and not greater than the maximum temperature threshold, and the humidity inside the cabinet is not less than a maximum humidity threshold (80%), determining the temperature interval correction coefficient as a second temperature coefficient (1.0) and the humidity interval correction coefficient as a third humidity coefficient (1.3). If the temperature in the cabinet is not less than the minimum temperature threshold and not greater than the maximum temperature threshold, and the humidity in the cabinet is less than the maximum humidity threshold (80%) and greater than the minimum humidity threshold (60%), the temperature interval correction coefficient is determined as the second temperature coefficient (1.0), and the humidity interval correction coefficient is determined as the second humidity coefficient (1.0); If the temperature in the cabinet is not less than the minimum temperature threshold and not greater than the maximum temperature threshold, and the humidity in the cabinet is not greater than the minimum humidity threshold (60%), the temperature interval correction coefficient is determined as the second temperature coefficient (1.0), and the humidity interval correction coefficient is determined as the first humidity coefficient (0.7); The first temperature coefficient is less than the second temperature coefficient, and the second temperature coefficient is less than the third temperature coefficient. The first humidity coefficient is less than the second humidity coefficient, and the second humidity coefficient is less than the third humidity coefficient.

7. The substation panel cabinet temperature and humidity control method of claim 6, wherein, The first temperature coefficient is 0.7, the second temperature coefficient is 1.0, and the third temperature coefficient is 1.

3. The first humidity coefficient is 0.7, the second humidity coefficient is 1.0, and the third humidity coefficient is 1.

3.

8. The substation panel cabinet temperature and humidity control method according to any one of claims 1 to 4, characterized by, The control of the heater, the dehumidifier, and the exhaust fan according to the temperature weight, the humidity weight, and the temperature in the cabinet includes: If the temperature in the cabinet is less than the minimum temperature threshold, the heater and the dehumidifier are controlled to start; If the temperature in the cabinet is greater than the maximum temperature threshold, the exhaust fan is controlled to run at high speed; If the temperature in the cabinet is not less than the minimum temperature threshold and not greater than the maximum temperature threshold, and the temperature weight is greater than the humidity weight, the heater, the dehumidifier, and the exhaust fan are all controlled to be turned off; If the temperature in the cabinet is not less than the minimum temperature threshold and not greater than the maximum temperature threshold, and the temperature weight is less than the humidity weight, the dehumidifier is controlled to start, and the exhaust fan is controlled to run at low speed; If the temperature in the cabinet is not less than the minimum temperature threshold and not greater than the maximum temperature threshold, and the temperature weight is equal to the humidity weight, the exhaust fan is controlled to be turned off, and the dehumidifier is controlled to start.

9. The substation panel cabinet temperature and humidity control method according to any one of claims 1 to 4, characterized by, The method further includes: acquiring a cabinet-outside-rain signal; If the cabinet-outside-rain signal is raining, the exhaust fan is controlled to be turned off.

10. An electronic device, comprising: The device includes a memory and a processor. The memory stores a computer program, and the processor implements the substation screen cabinet temperature and humidity control method of any one of claims 1 to 9 when executing the computer program. The device includes a memory and a processor. The memory stores a computer program, and the processor implements the substation screen cabinet temperature and humidity control method of any one of claims 1 to 9 when executing the computer program.

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