Power distribution cabinet dehumidification control method and system based on internal and external humidity difference and power distribution cabinet

Abstract

The invention provides a power distribution cabinet dehumidification control method and system based on the internal and external humidity difference and a power distribution cabinet. The method comprises the steps of obtaining internal and external humidity data of the power distribution cabinet and internal VOC concentration data of the power distribution cabinet; analyzing based on the acquired VOC concentration data, and judging the VOC diffusion trend in combination with the current external temperature of the power distribution cabinet; determining a humidity correction value based on the first height humidity data and the second height humidity data; according to the method, the variation of the humidity inside and outside the power distribution cabinet and the VOC concentration along with time can be calculated according to the dehumidification efficiency and the VOC concentration change data when dehumidification is carried out at a certain dehumidification rate, and a subsequent possible result can be predicted. Therefore, the hysteresis quality and complexity of solving the dehumidification extension problem are solved, accurate calculation and design basis can be provided for dehumidification of the power distribution cabinet, the initial accuracy is improved, and meanwhile, the possible subsequent problems are avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of dehumidification of power equipment, and in particular to a dehumidification control method and system for a power distribution cabinet based on internal and external humidity differences, and a power distribution cabinet. Background Art

[0002] Power distribution cabinets (PDCs) are key equipment used in power systems for the centralized distribution, control, and protection of electrical energy. They are widely used in industrial, commercial, construction, and infrastructure sectors. Their primary functions include power distribution, circuit protection, and monitoring and management, making them a vital component of power networks. Currently, most industrial PDCs are centrally located in a single distribution room, operating in a semi-sealed environment without adequate ventilation. Whenever high humidity weather occurs, high-humidity air continuously invades the PDCs. Once this air enters, it is difficult to naturally escape, causing moisture to build up in the cabinets and degrading electrical insulation. This can lead to problems such as grounding of live equipment, discharge of live equipment to ground, and power short circuits.

[0003] At present, there is a method of detecting the temperature and humidity inside the switch cabinet, starting the ventilation fan according to the humidity, adjusting the humidity inside the switch cabinet, starting the ventilation fan or cooling fan according to the temperature value, adjusting the temperature inside the switch cabinet, and realizing intelligent dehumidification of the distribution cabinet.

[0004] However, the dehumidification accuracy is currently low during the dehumidification process. Dehumidification equipment is mostly used to reduce the humidity to a certain threshold. Moreover, since a single device is used for dehumidification, the odor in the distribution cabinet will be discharged during the dehumidification process, which will increase the odor concentration in the distribution room, thereby triggering unnecessary alarms. The odor in the distribution room will also pose a safety risk. The existing system finds it difficult to build an interaction model between temperature, humidity and odor, and thus cannot formulate an accurate dehumidification control plan for complex environmental conditions. Summary of the Invention

[0005] In view of the deficiencies in the prior art, the present invention provides a dehumidification control method, system and distribution cabinet for a distribution cabinet based on the internal and external humidity difference, so as to solve the problems raised in the above background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a dehumidification control method for a distribution cabinet based on the internal and external humidity difference, comprising the following steps:

[0007] Obtain humidity data inside and outside the distribution cabinet and VOC concentration data inside the distribution cabinet;

[0008] The humidity data inside the power distribution cabinet includes humidity data at a first height and humidity data at a second height, wherein the first height is smaller than the second height;

[0009] Analyze the acquired VOC concentration data and determine the VOC diffusion trend based on the current external temperature of the power distribution cabinet;

[0010] determining a humidity correction value based on the first altitude humidity data and the second altitude humidity data;

[0011] Based on the external humidity data and humidity correction value, determine the humidity deviation value inside and outside the distribution cabinet;

[0012] Determine whether the humidity correction value and the humidity deviation value are greater than the preset humidity value. If so, control the dehumidification device to dehumidify the inside of the power distribution cabinet.

[0013] As a further preferred embodiment, the process of determining the VOC diffusion trend includes:

[0014] Analyze the collected VOC data to determine the type and source of VOC;

[0015] Calculate the diffusion trend and speed of VOCs under current temperature and humidity conditions based on the type and source of VOCs, as well as temperature and humidity data;

[0016] The calculation formula is:

[0017] Where J represents the VOC diffusion flux, D0 represents the diffusion coefficient, T represents the ambient temperature (actual temperature of the distribution cabinet), T0 represents the reference temperature, n represents the temperature index (diffusion sensitivity to temperature), α represents the temperature influence coefficient, RH represents the ambient humidity (actual humidity of the distribution cabinet), RH0 represents the parameter humidity, m represents the humidity index (diffusion sensitivity to humidity), C in Indicates the VOC concentration inside the distribution cabinet, and L indicates the diffusion distance.

[0018] As a further preferred embodiment, determining the humidity correction value based on the first height humidity data and the second height humidity data includes:

[0019] Acquire first height humidity data and second height humidity data at a plurality of time nodes, calculate a humidity correction value each time the first height humidity data and the second height humidity data are acquired, calculate a correction coefficient based on the plurality of humidity correction values, and determine the humidity correction value based on the correction coefficient;

[0020] The calculation formula of the correction coefficient is:

[0021]

[0022] Wherein, λ represents the correction coefficient, i represents the number of acquisitions, RH1 represents the humidity data at the first height, and RH2 represents the humidity data at the second height.

[0023] As a further preferred embodiment, the process of controlling the dehumidification device to dehumidify the interior of the power distribution cabinet includes:

[0024] Determining a dehumidification rate based on the humidity correction value and the deviation of the humidity deviation value from the preset humidity value;

[0025] Determine the VOC concentration change data inside and outside the distribution cabinet during the dehumidification process based on the initial rate and VOC diffusion trend;

[0026] The dehumidification rate is corrected based on the VOC concentration change data to determine the final dehumidification process.

[0027] As a further preferred embodiment, the process of determining the VOC concentration change data inside and outside the power distribution cabinet during the dehumidification process based on the initial rate and the VOC diffusion trend includes:

[0028] Determine the humidity removal efficiency inside the distribution cabinet at the initial rate, and the VOC diffusion rate based on the humidity removal efficiency;

[0029] The dynamic calculation formula for humidity is:

[0030]

[0031] Among them, RH e Indicates the external humidity of the power distribution cabinet, R d represents the dehumidification rate, σ represents the VOC diffusion and moisture carrying coefficient, J d represents the VOC diffusion flux under the dehumidification rate, θ represents the natural attenuation coefficient of humidity;

[0032] The dynamic calculation formula of VOC is:

[0033]

[0034] Where ε represents the correction coefficient of dehumidification on diffusion;

[0035] The VOC concentration change data inside and outside the distribution cabinet is determined by the VOC diffusion rate.

[0036] As a further preferred embodiment, a dehumidification control system for a power distribution cabinet based on internal and external humidity difference is used to implement the above-mentioned dehumidification control method for a power distribution cabinet based on internal and external humidity difference, comprising:

[0037] Data acquisition module, which obtains humidity data inside and outside the distribution cabinet and VOC concentration data inside the distribution cabinet;

[0038] The humidity data inside the power distribution cabinet includes humidity data at a first height and humidity data at a second height, wherein the first height is smaller than the second height;

[0039] The diffusion determination module is used to analyze the acquired VOC concentration data and determine the VOC diffusion trend based on the current external temperature of the power distribution cabinet;

[0040] A humidity acquisition module is used to determine a humidity correction value based on the first height humidity data and the second height humidity data, and to determine a humidity deviation value inside and outside the power distribution cabinet based on the external humidity data and the humidity correction value;

[0041] The control and adjustment module is used to determine whether the humidity correction value and the humidity deviation value are greater than the preset humidity value, and control the dehumidification device to dehumidify the inside of the distribution cabinet based on the determination result.

[0042] As a further preferred embodiment, the process of the diffusion determination module determining the VOC diffusion trend includes:

[0043] Analyze the collected VOC data to determine the type and source of VOC;

[0044] Calculate the diffusion trend and speed of VOCs under current temperature and humidity conditions based on the type and source of VOCs, as well as temperature and humidity data;

[0045] The calculation formula is:

[0046] Where J represents the VOC diffusion flux, D0 represents the diffusion coefficient, and T represents the ambient temperature (the actual temperature of the distribution cabinet).

[0047] As a further preferred embodiment, the process of determining the humidity correction value by the humidity acquisition module includes:

[0048] Acquire first height humidity data and second height humidity data at a plurality of time nodes, calculate a humidity correction value each time the first height humidity data and the second height humidity data are acquired, calculate a correction coefficient based on the plurality of humidity correction values, and determine the humidity correction value based on the correction coefficient;

[0049] The calculation formula of the correction coefficient is:

[0050]

[0051] Wherein, λ represents the correction coefficient, i represents the number of acquisitions, RH1 represents the humidity data at the first height, and RH2 represents the humidity data at the second height.

[0052] As a further preferred embodiment, the process of the control and regulation module controlling the dehumidification device to dehumidify the interior of the power distribution cabinet includes:

[0053] Determining a dehumidification rate based on the humidity correction value and the deviation of the humidity deviation value from the preset humidity value;

[0054] Determine the VOC concentration change data inside and outside the distribution cabinet during the dehumidification process based on the initial rate and VOC diffusion trend;

[0055] Correct the dehumidification rate based on VOC concentration change data to determine the final dehumidification process;

[0056] The process of determining the VOC concentration change data inside and outside the power distribution cabinet during the dehumidification process based on the initial rate and the VOC diffusion trend includes:

[0057] Determine the humidity removal efficiency inside the distribution cabinet at the initial rate, and the VOC diffusion rate based on the humidity removal efficiency;

[0058] The dynamic calculation formula for humidity is:

[0059]

[0060] Among them, RH e Indicates the external humidity of the power distribution cabinet, R d represents the dehumidification rate, σ represents the VOC diffusion and moisture carrying coefficient, J d represents the VOC diffusion flux under the dehumidification rate, θ represents the natural attenuation coefficient of humidity;

[0061] The dynamic calculation formula of VOC is:

[0062]

[0063] Where ε represents the correction coefficient of dehumidification on diffusion;

[0064] The VOC concentration change data inside and outside the distribution cabinet is determined by the VOC diffusion rate.

[0065] As a further preferred embodiment, a power distribution cabinet includes a controller, wherein the controller is used to execute computer instructions to implement the above-mentioned power distribution cabinet dehumidification control method based on the internal and external humidity difference.

[0066] The present invention provides a dehumidification control method, system, and distribution cabinet for a power distribution cabinet based on internal and external humidity differences, which have the following beneficial effects: by calculating the change in humidity and VOC concentration over time inside and outside the power distribution cabinet when dehumidification is performed at a certain dehumidification rate based on dehumidification efficiency and VOC concentration change data, and predicting possible subsequent results, thereby solving the hysteresis and complexity of the dehumidification extension problem, providing an accurate calculation and design basis for the dehumidification of the power distribution cabinet, thereby improving initial accuracy and avoiding possible subsequent problems;

[0067] In addition, during the dehumidification process, it is necessary to prevent excessive VOC emissions from the distribution cabinet, which would cause erroneous data to the indoor alarm mechanism and thus generate false alarms. BRIEF DESCRIPTION OF THE DRAWINGS

[0068] Figure 1 This is a flow chart of the dehumidification control method for a power distribution cabinet based on the internal and external humidity difference of the present invention;

[0069] Figure 2 This is a block diagram of the dehumidification control system for the power distribution cabinet based on the internal and external humidity difference of the present invention. DETAILED DESCRIPTION

[0070] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and are not to be construed as limiting the present invention.

[0071] The disclosure below provides many different embodiments or examples for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numbers and / or reference letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides examples of various specific processes and materials, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0072] like Figure 1 As shown, an embodiment of the present invention provides a distribution cabinet dehumidification control method based on the internal and external humidity difference, which is used for dehumidifying a distribution cabinet installed centrally and indoors, comprising the following steps:

[0073] S1: Obtain the humidity data inside and outside the distribution cabinet and the VOC concentration data inside the distribution cabinet;

[0074] The humidity data inside the power distribution cabinet includes humidity data at a first height and humidity data at a second height, wherein the first height is smaller than the second height;

[0075] Specifically, in the case of height differences, the humidity at different heights of the distribution cabinet will be different. By collecting the humidity conditions at different heights, the subsequent dehumidification control accuracy can be guaranteed.

[0076] In other embodiments, the first height may also be greater than the second height.

[0077] It should be noted that the second humidity data is specifically the installation height of the dehumidification device, and the temperature, humidity and VOC concentration inside and outside the distribution cabinet can be collected using corresponding sensors. By installing the sensors in appropriate locations, data can be accurately collected.

[0078] It is understandable that the dehumidification outlets of current distribution cabinets are mostly designed at the top or top side.

[0079] S2: Analyze the acquired VOC concentration data and determine the VOC diffusion trend based on the current external temperature of the power distribution cabinet;

[0080] Specifically, the collected VOC data is analyzed to determine the types and sources of VOCs;

[0081] Calculate the diffusion trend and speed of VOCs under current temperature and humidity conditions based on the type and source of VOCs, as well as temperature and humidity data;

[0082] The calculation formula is:

[0083] Where J represents the VOC diffusion flux, D0 represents the diffusion coefficient, T represents the ambient temperature (actual temperature of the distribution cabinet), T0 represents the reference temperature, n represents the temperature index (diffusion sensitivity to temperature), α represents the temperature influence coefficient, RH represents the ambient humidity (actual humidity of the distribution cabinet), RH0 represents the parameter humidity, m represents the humidity index (diffusion sensitivity to humidity), C in Indicates the VOC concentration inside the distribution cabinet, and L indicates the diffusion distance.

[0084] It can be understood that by considering the effects of temperature and humidity on VOC diffusion, the diffusion trend of VOC under current conditions is predicted.

[0085] S3: determining a humidity correction value based on the first height humidity data and the second height humidity data;

[0086] It is understandable that the influence of the internal temperature of the distribution cabinet will be taken into account when determining the humidity correction value.

[0087] Specifically, the humidity at different heights in the power distribution cabinet may be different, and the humidity correction value may be determined based on the humidity data at the first height and the humidity data at the second height.

[0088] The temperature correction value is determined by: obtaining first height humidity data and second height humidity data at a plurality of time nodes, and calculating a humidity correction value each time the first height humidity data and second height humidity data are obtained, calculating a correction coefficient based on the plurality of humidity correction values, and determining the humidity correction value based on the correction coefficient;

[0089] The calculation formula of the correction coefficient is:

[0090]

[0091] Wherein, λ represents the correction coefficient, i represents the number of acquisitions, RH1 represents the humidity data at the first height, and RH2 represents the humidity data at the second height.

[0092] It can be understood that the humidity correction value RH=λ*RH1.

[0093] In other embodiments, the calculation formula of the correction coefficient may also be:

[0094]

[0095] It can be understood that the humidity correction value RH=λ*RH2.

[0096] Among them, the humidity inside the distribution cabinet will be in a fluctuating state and affected by temperature. By collecting humidity data at different heights, the accurate judgment of the humidity data inside the distribution cabinet can be guaranteed, and subsequent dehumidification can keep the humidity in an appropriate range.

[0097] S4: Based on the external humidity data and the humidity correction value, determine the humidity deviation value inside and outside the power distribution cabinet;

[0098] It can be understood that the humidity deviation value inside and outside the power distribution cabinet is specifically the difference between the external humidity data and the humidity correction value.

[0099] S5: Determine whether the humidity correction value and the humidity deviation value are greater than a preset humidity value. If so, control the dehumidification device to dehumidify the inside of the power distribution cabinet.

[0100] The process of controlling the dehumidification device to dehumidify the inside of the power distribution cabinet includes:

[0101] Determining a dehumidification rate based on the humidity correction value and the deviation of the humidity deviation value from the preset humidity value;

[0102] Determine the VOC concentration change data inside and outside the distribution cabinet during the dehumidification process based on the initial rate and VOC diffusion trend;

[0103] The dehumidification rate is corrected based on the VOC concentration change data to determine the final dehumidification process.

[0104] Specifically, excessive VOC emissions from inside the distribution cabinet can provide erroneous data to the indoor alarm mechanism, resulting in false alarms.

[0105] The process of determining the VOC concentration change data inside and outside the distribution cabinet during the dehumidification process based on the initial rate and VOC diffusion trend includes:

[0106] Determine the humidity removal efficiency inside the distribution cabinet at the initial rate, and the VOC diffusion rate based on the humidity removal efficiency;

[0107] The dynamic calculation formula for humidity is:

[0108]

[0109] Among them, RH e Indicates the external humidity of the power distribution cabinet, R d represents the dehumidification rate, σ represents the VOC diffusion and moisture carrying coefficient, J d represents the VOC diffusion flux under the dehumidification rate, θ represents the natural attenuation coefficient of humidity;

[0110] The dynamic calculation formula of VOC is:

[0111]

[0112] Where ε represents the correction coefficient of dehumidification on diffusion;

[0113] The VOC concentration change data inside and outside the distribution cabinet is determined by the VOC diffusion rate.

[0114] Specifically, based on the dehumidification efficiency and VOC concentration change data, the humidity inside and outside the distribution cabinet and the change in VOC concentration over time when dehumidification is carried out at a certain dehumidification rate can be calculated, and the possible subsequent results can be predicted, thereby solving the lag and complexity of solving the dehumidification extension problem, and providing accurate calculation and design basis for the dehumidification of the distribution cabinet, thereby improving the initial accuracy and avoiding possible problems that may arise in the future.

[0115] like Figure 2 As shown, this embodiment further provides a distribution cabinet dehumidification control system based on internal and external humidity difference, which is used to implement the above-mentioned distribution cabinet dehumidification control method based on internal and external humidity difference, including:

[0116] Data acquisition module, which obtains humidity data inside and outside the distribution cabinet and VOC concentration data inside the distribution cabinet;

[0117] The humidity data inside the power distribution cabinet includes humidity data at a first height and humidity data at a second height, wherein the first height is smaller than the second height;

[0118] The diffusion determination module is used to analyze the acquired VOC concentration data and determine the VOC diffusion trend based on the current external temperature of the power distribution cabinet;

[0119] A humidity acquisition module is used to determine a humidity correction value based on the first height humidity data and the second height humidity data, and to determine a humidity deviation value inside and outside the power distribution cabinet based on the external humidity data and the humidity correction value;

[0120] The control and adjustment module is used to determine whether the humidity correction value and the humidity deviation value are greater than the preset humidity value, and control the dehumidification device to dehumidify the inside of the distribution cabinet based on the determination result.

[0121] Furthermore, the process of the diffusion determination module determining the VOC diffusion trend includes:

[0122] Analyze the collected VOC data to determine the type and source of VOC;

[0123] Calculate the diffusion trend and speed of VOCs under current temperature and humidity conditions based on the type and source of VOCs, as well as temperature and humidity data;

[0124] The calculation formula is:

[0125] Where J represents the VOC diffusion flux, D0 represents the diffusion coefficient, and T represents the ambient temperature (the actual temperature of the distribution cabinet).

[0126] Furthermore, the process of determining the humidity correction value by the humidity acquisition module includes:

[0127] Acquire first height humidity data and second height humidity data at a plurality of time nodes, calculate a humidity correction value each time the first height humidity data and the second height humidity data are acquired, calculate a correction coefficient based on the plurality of humidity correction values, and determine the humidity correction value based on the correction coefficient;

[0128] The calculation formula of the correction coefficient is:

[0129]

[0130] Wherein, λ represents the correction coefficient, i represents the number of acquisitions, RH1 represents the humidity data at the first height, and RH2 represents the humidity data at the second height.

[0131] Furthermore, the process of the control and regulation module controlling the dehumidification device to dehumidify the inside of the power distribution cabinet includes:

[0132] Determining a dehumidification rate based on the humidity correction value and the deviation of the humidity deviation value from the preset humidity value;

[0133] Determine the VOC concentration change data inside and outside the distribution cabinet during the dehumidification process based on the initial rate and VOC diffusion trend;

[0134] The dehumidification rate is corrected based on the VOC concentration change data to determine the final dehumidification process.

[0135] Specifically, the process of determining the VOC concentration change data inside and outside the power distribution cabinet during the dehumidification process based on the initial rate and the VOC diffusion trend includes:

[0136] Determine the humidity removal efficiency inside the distribution cabinet at the initial rate, and the VOC diffusion rate based on the humidity removal efficiency;

[0137] The dynamic calculation formula for humidity is:

[0138]

[0139] Among them, RH e Indicates the external humidity of the power distribution cabinet, R d represents the dehumidification rate, σ represents the VOC diffusion and moisture carrying coefficient, J d represents the VOC diffusion flux under the dehumidification rate, θ represents the natural attenuation coefficient of humidity;

[0140] The dynamic calculation formula of VOC is:

[0141]

[0142] Where ε represents the correction coefficient of dehumidification on diffusion;

[0143] The VOC concentration change data inside and outside the distribution cabinet is determined by the VOC diffusion rate.

[0144] On the other hand, the present invention further provides a power distribution cabinet, comprising a controller, wherein the controller is configured to execute computer instructions to implement the above-mentioned power distribution cabinet dehumidification control method based on the internal and external humidity difference.

[0145] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A dehumidification control method for a distribution cabinet based on the humidity difference between inside and outside, characterized in that: The following steps are involved: Obtain humidity data inside and outside the distribution cabinet and VOC concentration data inside the distribution cabinet; The humidity data inside the power distribution cabinet includes humidity data at a first height and humidity data at a second height, wherein the first height is smaller than the second height; Analyze the acquired VOC concentration data and determine the VOC diffusion trend based on the current external temperature of the power distribution cabinet; determining a humidity correction value based on the first altitude humidity data and the second altitude humidity data; Based on the external humidity data and humidity correction value, determine the humidity deviation value inside and outside the distribution cabinet; Determine whether the humidity correction value and the humidity deviation value are greater than the preset humidity value. If so, control the dehumidification device to dehumidify the inside of the power distribution cabinet.

2. A dehumidification control method for a power distribution cabinet based on internal and external humidity difference according to claim 1, characterized in that: The process of determining the VOC diffusion trend includes: Analyze the collected VOC data to determine the type and source of VOC; Calculate the diffusion trend and speed of VOCs under current temperature and humidity conditions based on the type and source of VOCs, as well as temperature and humidity data; The calculation formula is: Where J represents the VOC diffusion flux, D0 represents the diffusion coefficient, T represents the ambient temperature (actual temperature of the distribution cabinet), T0 represents the reference temperature, n represents the temperature index (diffusion sensitivity to temperature), α represents the temperature influence coefficient, RH represents the ambient humidity (actual humidity of the distribution cabinet), RH0 represents the parameter humidity, m represents the humidity index (diffusion sensitivity to humidity), C in Indicates the VOC concentration inside the distribution cabinet, and L indicates the diffusion distance.

3. The dehumidification control method for a power distribution cabinet based on internal and external humidity difference according to claim 1, characterized in that: Determining the humidity correction value based on the first height humidity data and the second height humidity data includes: Acquire first height humidity data and second height humidity data at a plurality of time nodes, calculate a humidity correction value each time the first height humidity data and the second height humidity data are acquired, calculate a correction coefficient based on the plurality of humidity correction values, and determine the humidity correction value based on the correction coefficient; The calculation formula of the correction coefficient is: Wherein, λ represents the correction coefficient, i represents the number of acquisitions, RH1 represents the humidity data at the first height, and RH2 represents the humidity data at the second height.

4. The dehumidification control method for a power distribution cabinet based on internal and external humidity difference according to claim 1, characterized in that: The process of controlling the dehumidification device to dehumidify the interior of the power distribution cabinet includes: Determining a dehumidification rate based on the humidity correction value and the deviation of the humidity deviation value from the preset humidity value; Determine the VOC concentration change data inside and outside the distribution cabinet during the dehumidification process based on the initial rate and VOC diffusion trend; The dehumidification rate is corrected based on the VOC concentration change data to determine the final dehumidification process.

5. A dehumidification control method for a power distribution cabinet based on internal and external humidity difference according to claim 4, characterized in that: The process of determining the VOC concentration change data inside and outside the power distribution cabinet during the dehumidification process based on the initial rate and the VOC diffusion trend includes: Determine the humidity removal efficiency inside the distribution cabinet at the initial rate, and the VOC diffusion rate based on the humidity removal efficiency; The dynamic calculation formula for humidity is: Among them, RH e Indicates the external humidity of the power distribution cabinet, R d represents the dehumidification rate, σ represents the VOC diffusion and moisture carrying coefficient, J d represents the VOC diffusion flux under the dehumidification rate, θ represents the natural attenuation coefficient of humidity; The dynamic calculation formula of VOC is: Where ε represents the correction coefficient of dehumidification on diffusion; The VOC concentration change data inside and outside the distribution cabinet is determined by the VOC diffusion rate.

6. A distribution cabinet dehumidification control system based on internal and external humidity difference, used to implement the distribution cabinet dehumidification control method based on internal and external humidity difference according to any one of claims 1 to 5, characterized in that: include: Data acquisition module, which obtains humidity data inside and outside the distribution cabinet and VOC concentration data inside the distribution cabinet; The humidity data inside the power distribution cabinet includes humidity data at a first height and humidity data at a second height, wherein the first height is smaller than the second height; The diffusion determination module is used to analyze the acquired VOC concentration data and determine the VOC diffusion trend based on the current external temperature of the power distribution cabinet; A humidity acquisition module is used to determine a humidity correction value based on the first height humidity data and the second height humidity data, and to determine a humidity deviation value inside and outside the power distribution cabinet based on the external humidity data and the humidity correction value; The control and adjustment module is used to determine whether the humidity correction value and the humidity deviation value are greater than the preset humidity value, and control the dehumidification device to dehumidify the inside of the distribution cabinet based on the determination result.

7. A dehumidification control system for a power distribution cabinet based on internal and external humidity difference according to claim 6, characterized in that: The process of the diffusion determination module determining the VOC diffusion trend includes: Analyze the collected VOC data to determine the type and source of VOC; Calculate the diffusion trend and speed of VOCs under current temperature and humidity conditions based on the type and source of VOCs, as well as temperature and humidity data; The calculation formula is: Where J represents the VOC diffusion flux, D0 represents the diffusion coefficient, and T represents the ambient temperature (the actual temperature of the distribution cabinet).

8. A dehumidification control system for a power distribution cabinet based on internal and external humidity difference according to claim 6, characterized in that: The process of determining the humidity correction value by the humidity acquisition module includes: Acquire first height humidity data and second height humidity data at a plurality of time nodes, calculate a humidity correction value each time the first height humidity data and the second height humidity data are acquired, calculate a correction coefficient based on the plurality of humidity correction values, and determine the humidity correction value based on the correction coefficient; The calculation formula of the correction coefficient is: Wherein, λ represents the correction coefficient, i represents the number of acquisitions, RH1 represents the humidity data at the first height, and RH2 represents the humidity data at the second height.

9. A dehumidification control system for a power distribution cabinet based on internal and external humidity difference according to claim 6, characterized in that: The process of the control and regulation module controlling the dehumidification device to dehumidify the inside of the power distribution cabinet includes: Determining a dehumidification rate based on the humidity correction value and the deviation of the humidity deviation value from the preset humidity value; Determine the VOC concentration change data inside and outside the distribution cabinet during the dehumidification process based on the initial rate and VOC diffusion trend; Correct the dehumidification rate based on VOC concentration change data to determine the final dehumidification process; The process of determining the VOC concentration change data inside and outside the power distribution cabinet during the dehumidification process based on the initial rate and the VOC diffusion trend includes: Determine the humidity removal efficiency inside the distribution cabinet at the initial rate, and the VOC diffusion rate based on the humidity removal efficiency; The dynamic calculation formula for humidity is: Among them, RH e Indicates the external humidity of the power distribution cabinet, R d represents the dehumidification rate, σ represents the VOC diffusion and moisture carrying coefficient, J d represents the VOC diffusion flux under the dehumidification rate, θ represents the natural attenuation coefficient of humidity; The dynamic calculation formula of VOC is: Where ε represents the correction coefficient of dehumidification on diffusion; The VOC concentration change data inside and outside the distribution cabinet is determined by the VOC diffusion rate.

10. A power distribution cabinet, characterized in that: It includes a controller, which is used to execute computer instructions to implement the dehumidification control method of the distribution cabinet based on the internal and external humidity difference as described in any one of claims 1 to 5.

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