Electrical screen cabinet temperature control method, system and device and nonvolatile storage medium

Abstract

The invention discloses an electrical screen cabinet temperature control method, system and device and a nonvolatile storage medium. The method comprises the steps that the actual flow of a branch pipeline is obtained based on the actual main flow of a main air pipe and the initial valve opening degree of the branch pipeline, the branch pipeline and the main air pipe belong to air supply paths, and the branch pipeline is used for supplying air to a corresponding electrical screen cabinet for cooling; the flow deviation between the actual branch flow and the target flow of the branch pipeline is determined; acquiring the surface temperature of equipment in the electrical screen cabinet; and the target valve opening degree of the branch pipeline is determined according to the temperature deviation between the equipment surface temperature and the target temperature and the flow deviation. The technical problem that the temperature control efficiency of an electrical screen cabinet is not ideal in the prior art is solved.

Description

Technical Field

[0001] The present application relates to the technical field of power operation and maintenance, and in particular, to an electrical switchgear temperature control method, system, device and non-volatile storage medium. Background Art

[0002] During the operation of electrical equipment (such as relay protection devices, automation control equipment, etc.) in the secondary equipment room of a substation, a large amount of heat is generated, resulting in an increase in the indoor temperature. Traditional heat dissipation and temperature control means (such as split air conditioners, fan coil units) cannot dynamically adjust the cooling demand according to the equipment load and environmental changes, resulting in problems of overcooling or insufficient cooling, wasting energy and increasing operation and maintenance costs. In addition, there are many branches in the precision air supply system, and the high cost and installation limitations of traditional flow meters limit the coverage of flow monitoring points, affecting the operation effect of the system.

[0003] In view of the above problems, no effective solution has been proposed yet. Summary of the Invention

[0004] Embodiments of the present application provide an electrical switchgear temperature control method, system, device and non-volatile storage medium to at least solve the technical problem of unsatisfactory temperature control efficiency in electrical switchgears in related technologies.

[0005] According to one aspect of the embodiments of the present application, an electrical switchgear temperature control method is provided, including: obtaining the actual flow rate of a branch pipe based on the actual main flow rate of a main air duct and the initial valve opening of the branch pipe, where the branch pipe and the main air duct belong to an air supply path, and the branch pipe is used to supply air for cooling the corresponding electrical switchgear; determining the flow deviation between the actual branch flow rate and the target flow rate of the branch pipe; obtaining the surface temperature of the equipment inside the electrical switchgear; and determining the target valve opening of the branch pipe according to the temperature deviation between the surface temperature of the equipment and the target temperature, and the flow deviation.

[0006] Optionally, obtaining the actual flow rate of the branch pipe based on the actual main flow rate of the main air duct and the initial valve opening of the branch pipe includes: inputting the actual main flow rate and the initial valve opening, and processing them using a trained virtual flow meter model to obtain the actual flow rate, where the trained virtual flow meter model is used to establish the non-linear relationship between the actual main flow rate and the initial valve opening, and the actual flow rate.

[0007] Optionally, the method further includes: obtaining the historical main flow rate of the main air duct, the historical valve opening of the branch pipe, and the historical branch flow rate of the branch pipe; inputting the historical main flow rate and the historical valve opening into the virtual flow meter model for training to obtain the predicted branch flow rate of the branch pipe; and updating the virtual flow meter model based on the historical branch flow rate and the predicted branch flow rate to obtain the trained virtual flow meter model.

[0008] Optionally, determine the target valve opening degree of the branch pipeline according to the temperature deviation between the device surface temperature and the target temperature, as well as the flow deviation, including: based on the temperature deviation and the flow deviation, adopt a closed-loop control algorithm to adjust the initial valve opening degree to obtain the target valve opening degree, where the closed-loop control algorithm includes a proportional gain coefficient, an integral gain coefficient, and a differential gain coefficient. The proportional gain coefficient is used to respond to the flow change, the integral gain coefficient is used to eliminate the flow error, and the differential gain coefficient is used to suppress the flow fluctuation.

[0009] Optionally, there are multiple electrical switchboards, and the multiple electrical switchboards share the main pipeline. Each of the multiple electrical switchboards is provided with an air inlet at the bottom and is connected to the corresponding branch pipeline. Each of the multiple electrical switchboards is provided with an air outlet at the top, and an exhaust fan is arranged at the air outlet to discharge the hot air of the corresponding electrical switchboard into the roof.

[0010] According to another aspect of the embodiments of the present application, there is provided an electrical switchboard temperature control system, including: a supply air cabinet, a supply air pipeline, a return air pipeline, an electrical switchboard, and a controller that applies the electrical switchboard temperature control method according to any one of claims 1 to 5; wherein, the supply air cabinet is used to generate cold air and transmit it to the bottom of the electrical switchboard through the supply air pipeline, so that the internal equipment of the electrical switchboard is cooled, and the top of the electrical switchboard is used for heat dissipation.

[0011] Optionally, a filter section, a surface cooler section, a fan section, an adjustment section, and a static pressure box are sequentially arranged in the supply air cabinet. The filter section is used to filter impurities in the air, the surface cooler section is used to absorb the heat in the air through a heat exchanger, the fan section is used to push the air into the supply air pipeline, the adjustment section is used to control the air volume of the supply air cabinet entering the supply air pipeline, and the static pressure box is used to balance the air pressure.

[0012] According to another aspect of the embodiments of the present application, there is provided an electrical switchboard temperature control device, including: a flow acquisition module, configured to obtain the actual flow rate of the branch pipeline based on the actual main flow rate of the main air duct and the initial valve opening degree of the branch pipeline, where the branch pipeline and the main air duct belong to the air supply path, and the branch pipeline is used to supply air for cooling the corresponding electrical switchboard; a deviation determination module, configured to determine the flow deviation between the actual branch flow rate and the target flow rate of the branch pipeline; a temperature acquisition module, configured to acquire the surface temperature of the equipment in the electrical switchboard; and an opening degree adjustment module, configured to determine the target valve opening degree of the branch pipeline according to the temperature deviation between the surface temperature of the equipment and the target temperature, as well as the flow deviation.

[0013] According to another aspect of the embodiments of the present application, there is provided a non-volatile storage medium, and the non-volatile storage medium stores multiple instructions, and the instructions are suitable for being loaded and executed by a processor to execute the electrical switchboard temperature control method according to any one of the above.

[0014] According to another aspect of the embodiments of the present application, an electronic device is provided, including: one or more processors and a memory, where the memory is used to store one or more programs, and when the one or more programs are executed by the one or more processors, the one or more processors are caused to implement the electrical cabinet temperature control method of any one of the above.

[0015] In the embodiments of the present application, based on the actual main flow rate of the main air duct and the initial valve opening of the branch pipe, the actual flow rate of the branch pipe is obtained, where the branch pipe and the main air duct belong to the air supply path, and the branch pipe is used to supply air for cooling the corresponding electrical cabinet; the flow rate deviation between the actual branch flow rate and the target flow rate of the branch pipe is determined; the surface temperature of the equipment inside the electrical cabinet is obtained; according to the temperature deviation between the surface temperature of the equipment and the target temperature, and the flow rate deviation, the target valve opening of the branch pipe is determined. The purpose of accurately cooling the electrical cabinet and improving the energy utilization efficiency is achieved, the technical effect of improving the temperature control efficiency of the electrical cabinet is realized, and further the technical problem that the temperature control efficiency of the electrical cabinet in the related technology is not ideal is solved. Description of the Drawings

[0016] The drawings described herein are used to provide a further understanding of the present application, and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application, and do not constitute an improper limitation of the present application. In the drawings:

[0017] Figure 1 is a flowchart of an optional electrical cabinet temperature control method provided according to the embodiments of the present application;

[0018] Figure 2 is a schematic structural diagram of an optional electrical cabinet temperature control system provided according to the embodiments of the present application;

[0019] Figure 3 is a schematic diagram of the electrical cabinet structure of an optional electrical cabinet temperature control system provided according to the embodiments of the present application;

[0020] Figure 4 is a schematic diagram of the internal air supply of the electrical cabinet of an optional electrical cabinet temperature control system provided according to the embodiments of the present application;

[0021] Figure 5 is a schematic diagram of an optional electrical cabinet temperature control device provided according to the embodiments of the present application. Detailed Embodiments

[0022] To enable those skilled in the art to better understand the solution of this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.

[0023] It should be noted that the terms "first", "second", etc. in the specification, claims and above-mentioned drawings of this application are used to distinguish similar objects, and do not necessarily need to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of this application described here can be implemented in an order different from those illustrated or described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units does not necessarily need to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0024] For the convenience of description, some nouns or terms related to the embodiments of this application are explained below:

[0025] An electrical switchgear cabinet is a special cabinet used for installing, fixing and protecting electrical equipment, and is usually used in places such as substations and distribution rooms. It provides physical support and protection for electrical equipment, and at the same time has functions such as heat dissipation, dust prevention and fire prevention to ensure that the equipment operates in a safe and stable environment.

[0026] The secondary equipment room is a special space in the substation for centrally placing the secondary equipment of the power system. The secondary equipment of the power system is mainly used for monitoring, controlling, protecting and communicating the operating status of the primary equipment to ensure the safe, stable and reliable operation of the power system. The equipment in the secondary equipment room has strict requirements for the operating temperature and usually needs to be maintained within a certain temperature range (such as 18°C to 28°C). Excessive temperature may cause the equipment to overheat, operate unstably or even be damaged.

[0027] According to the embodiments of this application, an embodiment of a method for controlling the temperature of an electrical switchgear cabinet is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. And although the logical order is shown in the flowchart, in some cases, the steps shown or described here can be executed in a different order from here.

[0028] Figure 1is a flowchart of an electrical cabinet temperature control method according to an embodiment of the present application. As Figure 1 shown, the method includes the following steps:

[0029] Step S102, based on the actual main flow rate of the main air duct and the initial valve opening of the branch pipe, obtain the actual flow rate of the branch pipe. Among them, the branch pipe and the main air duct belong to the air supply path, and the branch pipe is used to supply air for cooling the corresponding electrical cabinet;

[0030] It can be understood that the flow rate of the main air duct is monitored in real time through a flow sensor to obtain the total flow rate of the current air supply system. When the system is started or initialized, the initial opening of each branch pipe valve is recorded. The initial opening determines the initial flow rate distribution of the branch pipe. According to the actual flow rate of the main air duct and the initial valve opening of the branch pipe, the actual flow rate of each branch pipe is calculated. The virtual flow meter avoids the high cost and installation complexity of traditional flow meters through model prediction. Through the above processing, the actual flow rate of each branch pipe can be calculated quickly and accurately, providing basic data for subsequent flow rate adjustment.

[0031] In an alternative embodiment, based on the actual main flow rate of the main air duct and the initial valve opening of the branch pipe, obtaining the actual flow rate of the branch pipe includes: inputting the actual main flow rate and the initial valve opening, and processing them using a trained virtual flow meter model to obtain the actual flow rate. Among them, the trained virtual flow meter model is used to establish a non-linear relationship between the actual main flow rate and the initial valve opening, and the actual flow rate.

[0032] It can be understood that in order to obtain the actual flow rate of the branch pipe, a method based on the virtual flow meter model is adopted. Specifically, first, the actual flow rate of the main air duct and the initial valve opening of the branch pipe are used as input parameters and input into the trained virtual flow meter model. The model has established a non-linear relationship between the main air duct flow rate, the branch pipe valve opening, and the actual flow rate of the branch pipe through a pre-trained data set. Through this relationship, the model can quickly calculate and output the actual flow rate of the branch pipe. This method uses a virtual flow meter model to replace traditional physical flow meters, achieving efficient and accurate flow rate estimation.

[0033] Optionally, this embodiment can specifically implement the virtual flow meter based on a neural network. Using multiple sets of data generated by CFD (Computational Fluid Dynamics) simulation to train the neural network model and establish a non-linear relationship between input and output. First, the data is normalized to a fixed range (such as [0.1]), and the CFD data set is divided into a training set (70%), a validation set (15%), and a test set (15%). Then the main air duct flow rate Q total and the valve opening A of each branch pipe iAs the output value, the flow rate Q of each branch pipe i As the output value, a deep learning framework is constructed, and the mean square error is used to measure the deviation between the predicted value and the true value. Then, the preprocessed data is input into the neural network for training, the validation set is used to evaluate the model performance, and the test set is used to evaluate the model accuracy.

[0034] In an alternative embodiment, the method further includes: obtaining the historical main flow rate of the main air duct, the historical valve opening degree of the branch pipe, and the historical branch flow rate of the branch pipe; inputting the historical main flow rate and the historical valve opening degree into the virtual flowmeter model for training to obtain the predicted branch flow rate of the branch pipe; updating the virtual flowmeter model based on the historical branch flow rate and the predicted branch flow rate to obtain the trained virtual flowmeter model.

[0035] It can be understood that the historical main flow rate of the main air duct, the historical valve opening degree of the branch pipe, and the historical branch flow rate of the branch pipe are collected. These historical data are obtained through monitoring during the actual operation process. Taking these historical main flow rate and historical valve opening degree as input data and inputting them into the virtual flowmeter model for training, so as to obtain the predicted branch flow rate of the branch pipe. By comparing the differences between the historical branch flow rate and the predicted branch flow rate, the virtual flowmeter model is optimized and updated, and finally the trained virtual flowmeter model is obtained. Through continuous learning and adjustment, the prediction accuracy and reliability of the model are improved.

[0036] Optionally, based on the idea of a virtual flowmeter, combining simulation data with a deep learning model, the real-time flow rate and valve opening degree of the air supply system are dynamically adjusted to ensure the constancy of the temperature of the electrical switchgear cabinet. First, a precise air supply simulation model of the secondary equipment room is established using numerical simulation software. According to the actual physical structure and the layout of the air supply system, the air supply conditions under different working conditions are simulated to generate a large-scale data set. These data include parameters such as the main air duct flow rate, the valve opening degree and flow rate of each branch pipe. After processing the above data, it is used to train the deep learning model. Taking the main air duct flow rate and the branch pipe valve opening degree as inputs and the flow rate of each branch pipe as the output, the model is optimized through the mean square error, and finally a non-linear mapping relationship between the input and output is established.

[0037] Optionally, the temperature, the air valve opening degree and the air supply parameters are collected in real time through sensors. Specifically, temperature sensors are arranged to monitor the temperature T inside the electrical switchgear of the secondary equipment a , the indoor temperature T room and the air supply temperature T in ; a flow sensor is arranged in the main pipeline to monitor the actual flow rate Q of the main pipeline z ; and the valve opening degree A of each branch pipe is monitored in real time. Ensure that the data collection frequency is high enough (such as 5s) to capture dynamic changes.

[0038] Step S104, determine the flow deviation between the actual branch flow and the target flow of the branch pipeline;

[0039] It can be understood that according to the equipment heat dissipation requirements and target temperature in the electrical switchgear cabinet, the target flow of each branch pipeline is preset in advance. Compare the actual flow of the branch pipeline (calculated in step S102) with the target flow, and calculate the flow deviation (ΔQ = target flow - actual flow). If the actual flow is lower than the target flow, it means that the air supply volume needs to be increased; otherwise, the air supply volume needs to be decreased. By calculating the flow deviation in real time, the system can quickly respond to changes in equipment heat dissipation requirements and dynamically adjust the air supply volume. Ensure that the air supply volume of each electrical switchgear cabinet matches the heat dissipation requirements, avoid overcooling or insufficient cooling, and improve the overall cooling efficiency.

[0040] Step S106, obtain the surface temperature of the equipment in the electrical switchgear cabinet;

[0041] It can be understood that temperature sensors are installed in the electrical switchgear cabinet to monitor the surface temperature of the equipment in real time. Transmit the collected surface temperature data of the equipment to the control system as the basis for subsequent adjustment. Directly monitoring the surface temperature of the equipment can more accurately reflect the actual operating state of the equipment and provide data support for precise control. By monitoring the temperature in real time, the risk of equipment overheating can be detected in time, and measures can be taken in advance to reduce the equipment failure rate.

[0042] Step S108, determine the target valve opening of the branch pipeline according to the temperature deviation between the surface temperature of the equipment and the target temperature, and the flow deviation.

[0043] It can be understood that compare the actual temperature of the equipment surface with the preset target temperature, and calculate the temperature deviation (ΔT = actual temperature - target temperature). Combine the temperature deviation (ΔT) and the flow deviation (ΔQ), and calculate the target valve opening of the branch pipeline through the PID control algorithm. If the equipment temperature is too high (ΔT>0), increase the air supply volume (increase the valve opening). If the equipment temperature is too low (ΔT<0), reduce the air supply volume (decrease the valve opening). At the same time, adjust the valve opening according to the flow deviation to ensure that the actual flow is close to the target flow. According to the calculation results, dynamically adjust the valve opening of the branch pipeline to achieve precise air supply. By comprehensively considering the temperature deviation and the flow deviation, realize intelligent and dynamic air supply control, improve the adaptive ability of the system. Ensure that the air supply volume of each electrical switchgear cabinet matches the actual demand, avoid energy waste, and improve energy utilization efficiency. By precisely controlling the equipment temperature, reduce equipment failures caused by overheating or overcooling, and extend the service life of the equipment.

[0044] Optionally, set the target temperature T in the electrical switchgear cabinet set (such as T set= 25°C), and calculate the actual temperature T inside each electrical cabinet in real time real and the target temperature T set deviation ΔT:

[0045] ΔT = T real - T set

[0046] Set the target flow rate Q of each electrical cabinet set , and according to the device temperature T a monitored in real time and the indoor temperature T room , calculate the real-time heat dissipation Q of the device load :

[0047] Q load = h·F·(T a - T room )

[0048] where h is the heat transfer coefficient (e.g., h = 5 W / m 2 ·K); F is the heat transfer area (e.g., F = 2 m 2 ).

[0049] Then, combine the real-time heat dissipation Q of the device load with the set target temperature T set , and calculate the real-time target flow rate Q set :

[0050]

[0051] Using the trained neural network model, by inputting the actual flow rate Q of the main pipeline in real time z and the valve opening A of each branch pipe, predict the branch pipe flow rate Q real in real time. And calculate the deviation ΔQ between the real-time flow rate and the target flow rate of each branch pipe in real time:

[0052] ΔQ = Q real - Q set

[0054] In an optional embodiment, according to the temperature deviation between the device surface temperature and the target temperature, and the flow rate deviation, determine the target valve opening of the branch pipeline, including: based on the temperature deviation and the flow rate deviation, adopt a closed-loop control algorithm to adjust the initial valve opening to obtain the target valve opening, where the closed-loop control algorithm includes a proportional gain coefficient, an integral gain coefficient, and a differential gain coefficient. The proportional gain coefficient is used to respond to the flow rate change, the integral gain coefficient is used to eliminate the flow rate error, and the differential gain coefficient is used to suppress the flow rate fluctuation.

[0055] It is understandable that the temperature deviation (ΔT) between the surface temperature of the computing device and the target temperature, and the flow deviation (ΔQ) between the actual flow rate of the branch pipe and the target flow rate are calculated. These two deviation values reflect the difference between the current air supply system and the ideal state. The closed-loop control algorithm is a feedback control method that adjusts the system in real-time by monitoring the output of the system (such as device temperature and flow rate) according to the set target values to achieve stable operation of the system. The closed-loop control algorithm is used to adjust the valve opening of the branch pipe to ensure that the device temperature and flow rate reach the expected targets. The proportional gain coefficient is used to directly respond to changes in flow rate. When the flow deviation is large, the proportional gain coefficient quickly adjusts the valve opening to increase or decrease the air supply volume, thereby quickly responding to changes in the system. The integral gain coefficient is used to eliminate flow errors. By accumulating the integral value of the flow deviation, the integral gain coefficient can gradually adjust the valve opening to eliminate long-term flow errors and ensure the long-term stability of the system. The derivative gain coefficient is used to suppress flow fluctuations. By detecting the rate of change of the flow deviation, the derivative gain coefficient can adjust the valve opening in advance to prevent rapid fluctuations in flow rate, thereby improving the stability and response speed of the system. The closed-loop control algorithm dynamically adjusts the initial valve opening of the branch pipe based on the functions of the above three gain coefficients to finally obtain the target valve opening (A new ).

[0056] Through the closed-loop control algorithm, the system can dynamically adjust the valve opening according to the real-time temperature deviation and flow deviation, ensuring that the surface temperature and flow rate of the device always remain within the target range. It effectively avoids problems such as overheating or insufficient cooling of the device, and improves the operating stability and safety of the device. By dynamically adjusting the valve opening, the system can accurately distribute the air supply volume according to actual needs, avoid unnecessary energy waste, and improve energy utilization efficiency.

[0057] Optionally, the surface temperature of the device, the indoor temperature, the main duct flow rate, and the branch pipe valve opening are monitored by sensors, and these real-time data are input into the above deep learning model to predict the real-time flow rate of each branch pipe. At the same time, according to the set target temperature, the real-time heat dissipation of the device is calculated, and then the target flow rate is determined. By comparing the deviation between the actual flow rate and the target flow rate, the valve opening is dynamically adjusted. The adjustment of the valve opening is realized by the control algorithm, thereby accurately controlling the air supply volume. The system can optimize the air supply volume distribution in real-time under the conditions of changes in the device heat dissipation load and the indoor environment, ensuring both the stability of the device temperature and the improvement of energy utilization efficiency.

[0058] Optionally, according to the deviation ΔT between the actual temperature T real inside each electrical cabinet and the target temperature T set , judge whether to increase or decrease the valve opening:

[0059] If the surface temperature of the device is too high (ΔT > 0), increase the air supply volume (increase the valve opening A);

[0060] If the surface temperature of the device is too low (ΔT < 0), reduce the air supply volume (reduce the valve opening A).

[0061] The specific value of the valve opening A is adjusted using the PID control algorithm:

[0062]

[0063] where A new is the adjusted air valve opening, with a range of 0 - 1; A current is the current air valve opening. K P 、K i 、K d are the proportional, integral, and derivative gain coefficients respectively. When ΔQ is large, the proportional term K P increases rapidly to provide more cold air. The integral term K i is used to eliminate the accumulated flow error to ensure long-term stability. The derivative term K d suppresses rapid flow fluctuations and prevents over-regulation of the air valve. According to the flow deviation and the PID controller, the valve opening A is adjusted in real time to keep the surface temperature of the device and the indoor temperature stable.

[0064] In an optional embodiment, there are multiple electrical switch cabinets. The multiple electrical switch cabinets share the main pipeline. Each of the multiple electrical switch cabinets is provided with an air inlet at the bottom connected to the corresponding branch pipeline, and each of the multiple electrical switch cabinets is provided with an air outlet at the top. The air outlet is provided with an exhaust fan for discharging the hot air of the corresponding electrical switch cabinet into the roof.

[0065] It can be understood that there are multiple electrical switch cabinets, and these electrical switch cabinets share a main pipeline for air supply. Each electrical switch cabinet is provided with an air inlet at the bottom, and these air inlets are respectively connected to the corresponding branch pipelines, so as to achieve precise supply of cold air. At the same time, each electrical switch cabinet is provided with an air outlet at the top, and an exhaust fan is installed at the air outlet. The function of the exhaust fan is to discharge the hot air inside the electrical switch cabinet, so that it is discharged into the roof space through the air outlet at the top, thereby realizing effective discharge of hot air and rapid dissipation of indoor heat.

[0066] By setting an air inlet at the bottom of each electrical cabinet and connecting it to the corresponding branch pipe, cold air can be accurately sent into each cabinet to directly cool the equipment. This design follows the principle of "cooling the equipment first and then the environment", effectively reducing the temperature fluctuation of the core components inside the cabinet and improving the operating stability and safety of the equipment. An air outlet is set at the top of each electrical cabinet, and an exhaust fan is installed to quickly discharge the hot air inside the cabinet. The use of the exhaust fan ensures that the hot air can be quickly discharged from the cabinet, preventing heat from accumulating inside the cabinet and further optimizing the heat dissipation effect. Multiple electrical cabinets share a main pipe, which simplifies the layout of the air supply system and reduces the complexity and cost of the system. At the same time, through the cooperation of the branch pipes and the exhaust fans, independent control and heat dissipation of each cabinet are achieved, improving the flexibility and adaptability of the system.

[0067] Through the above step S102, based on the actual main flow rate of the main air duct and the initial valve opening of the branch pipe, the actual flow rate of the branch pipe is obtained. Here, the branch pipe and the main air duct belong to the air supply path, and the branch pipe is used to supply air for cooling the corresponding electrical cabinet; step S104, determine the flow deviation between the actual branch flow rate and the target flow rate of the branch pipe; step S106, obtain the surface temperature of the equipment inside the electrical cabinet; step S108, determine the target valve opening of the branch pipe according to the temperature deviation between the surface temperature of the equipment and the target temperature, as well as the flow deviation. The purpose of accurately cooling the electrical cabinet and improving the energy utilization efficiency can be achieved, and the technical effect of improving the temperature control efficiency of the electrical cabinet is realized, thereby solving the technical problem of unsatisfactory temperature control efficiency of the electrical cabinet in the related art.

[0068] It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. And although the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in a different order than here.

[0069] In the embodiment of the present application, an electrical cabinet temperature control system is also provided. The electrical cabinet temperature control system provided by the embodiment of the present application will be introduced below.

[0070] Figure 2 is a schematic structural diagram of the electrical cabinet temperature control system provided by the embodiment of the present application. As Figure 2 shown, the system includes: an air supply cabinet 2, an air supply pipe 3, an electrical cabinet 1, and a controller 0 that applies the electrical cabinet temperature control method of any one of the above embodiments; among them, the air supply cabinet 2 is used to generate cold air, which is transmitted to the bottom of the electrical cabinet 1 through the air supply pipe 3 to cool the equipment inside the electrical cabinet 1, and the top of the electrical cabinet 1 is used for heat dissipation.

[0071] It can be understood that the system includes a supply air cabinet, supply air ducts, return air ducts, electrical switchgear cabinets, and a controller. The supply air cabinet is the core equipment of the entire system and is used to generate cold air. The supply air ducts are used to transmit the cold air generated by the supply air cabinet to the bottom of each electrical switchgear cabinet. The supply air ducts usually adopt a branched structure, and each branch duct is connected to the air inlet of an electrical switchgear cabinet. By adjusting the valves on the branch ducts, the air supply volume to each electrical switchgear cabinet can be controlled. The electrical switchgear cabinet is a device for installing and protecting electrical equipment and is also the ultimate object of action for the cooling air. The structural characteristics of the electrical switchgear cabinet include: the air inlet is located at the bottom of the electrical switchgear cabinet and is connected to the supply air duct for introducing cold air. The air outlet is located at the top of the electrical switchgear cabinet and is usually equipped with a cooling fan for discharging hot air. The cold air enters the electrical switchgear cabinet from the bottom and directly cools the internal equipment, and the hot air is discharged through the cooling fan at the top. The return air duct is used to collect the hot air discharged from the electrical switchgear cabinet and return it to the supply air cabinet or discharge it outdoors, concentrating and discharging the hot air to avoid heat accumulation in the equipment room. The controller is the intelligent core of the entire system and is used to achieve precise control of the temperature of the electrical switchgear cabinet. The controller uses sensors to continuously monitor parameters such as the surface temperature of the equipment, supply air temperature, and main air duct flow rate inside the electrical switchgear cabinet. According to the preset target temperature and flow rate, the controller uses a closed-loop control algorithm (such as PID control) to dynamically adjust the valve opening of the branch ducts to ensure the best cooling effect for each electrical switchgear cabinet.

[0072] By directly introducing cold air into the interior of the electrical switchgear cabinet to precisely cool the equipment, the fluctuation of the surface temperature of the equipment is effectively reduced. The operating stability and safety of the equipment are improved, and equipment failures caused by overheating are reduced. By dynamically adjusting the air supply volume, the system can optimize the air supply volume distribution according to the actual heat dissipation requirements of the equipment and environmental conditions, avoiding over-cooling or under-cooling.

[0073] Optionally, the controller can also be integrated with Internet of Things technology to achieve remote monitoring and centralized management.

[0074] Optionally, Figure 3 is a schematic structural diagram of an electrical switchgear cabinet of an optional electrical switchgear cabinet temperature control system provided according to an embodiment of the present application, as Figure 3As shown in the figure, there is an electrical cabinet 1, an air inlet 11, a cooling fan 12, and an air outlet 13. The electrical cabinet 1 provides physical support and protection for internal equipment, and at the same time has functions such as heat dissipation and dust prevention. The air inlet 11 is located at the bottom of the electrical cabinet and is the entrance for cold air to enter the cabinet interior. The design of the air inlet is usually connected to the air supply duct to ensure that cold air can smoothly enter the cabinet interior. The cooling fan 12 is installed on the top of the electrical cabinet and is used to discharge the hot air inside the cabinet. The cooling fan discharges the hot air out of the cabinet through forced convection, thereby achieving a good heat dissipation effect. The air outlet 13 is located at the top of the electrical cabinet and is connected to the cooling fan. The air outlet is the channel for discharging hot air, and usually discharges the hot air into the roof or the return air duct to avoid heat accumulation in the equipment room.

[0075] Figure 4 As shown in the internal air supply schematic diagram of an optional electrical cabinet temperature control system provided by an embodiment of the present application, Figure 4 As shown in the figure, there are an air inlet 11, an air outlet 13, an internal heat dissipation device 14 in the electrical cabinet, an air supply duct 3, and a cold air flow 4. The internal heat dissipation device 14 in the electrical cabinet is an electrical device inside the cabinet and is the main object of cooling air. Electrical equipment generates heat during operation and needs to be cooled by cold air. The cold air flow 4 is represented by an arrow to indicate the flow direction of the cold air flow. The cold air flow enters the cabinet interior from the air inlet, absorbs heat and becomes hot air after passing through the heat dissipation device, and finally is discharged through the air outlet 13.

[0076] As an optional embodiment, a filter section, a cooling coil section, a fan section, a regulating section, and a plenum chamber are sequentially arranged in the air supply cabinet. Among them, the filter section is used to filter impurities in the air, the cooling coil section is used to absorb the heat in the air through a heat exchanger, the fan section is used to push the air into the air supply duct, the regulating section is used to control the air volume entering the air supply duct from the air supply cabinet, and the plenum chamber is used to balance the air pressure.

[0077] It can be understood that the internal structure of the air supply cabinet is sequentially divided into a filter section, a cooling coil section, a fan section, an adjustment section, and a static pressure box according to functions. The filter section is the first section of the air supply cabinet and is mainly used to filter the air entering the air supply system and remove impurities such as dust and particulate matter in the air. By filtering the impurities in the air, it ensures that the air sent into the electrical switchgear cabinet is clean, avoids the influence of dust on the operation of electrical equipment, and extends the service life of the equipment. The cooling coil section absorbs the heat in the air through a heat exchanger, thereby reducing the temperature of the air. The heat exchanger usually consists of cooling coils, and a cooling medium (such as cold water) flows in the coils to exchange heat with the air. By absorbing the heat in the air, cold air is sent into the electrical switchgear cabinet to achieve effective cooling of the equipment. The cooling coil section is the key part for temperature control in the entire air supply system to ensure that the supply air temperature meets the cooling requirements. The fan section is equipped with a fan to push the air through the air supply cabinet and into the air supply duct. The rotational speed and power of the fan can be adjusted according to system requirements. The fan section provides power for the entire air supply system to ensure that air can enter the air supply duct and reach the electrical switchgear cabinet at a sufficient flow rate and volume. By adjusting the rotational speed of the fan, the air supply volume can be flexibly controlled to meet the cooling requirements under different working conditions. The adjustment section is used to control the air volume of the air supply cabinet entering the air supply duct. Through the air valve or other adjustment devices in the adjustment section, the air flow rate entering the air supply duct can be accurately controlled. The adjustment section can dynamically adjust the air volume according to the actual needs of the system to ensure that the air supply volume of each electrical switchgear cabinet matches the heat dissipation requirements. This adjustment ability improves the flexibility and adaptability of the system and optimizes the cooling effect. The static pressure box is located at the end of the air supply cabinet and is used to balance the air pressure. It evenly distributes the air into each air supply duct to ensure that the air supply pressure of each branch duct is consistent. The static pressure box can eliminate the pressure fluctuations generated by the fan and ensure the stable operation of the air supply system. By balancing the air pressure, the static pressure box ensures that the air supply volume of each electrical switchgear cabinet in the air supply system is uniform and stable, improving the overall performance of the system.

[0078] In this embodiment, the air supply cabinet realizes the purification, cooling, power transmission, flow rate adjustment, and pressure balance of the air by sequentially arranging a filter section, a cooling coil section, a fan section, an adjustment section, and a static pressure box. This structural design not only ensures the efficient operation of the air supply system but also, through the coordinated action of each part, achieves precise cooling and energy optimization of the electrical switchgear cabinet.

[0079] By setting up a supply air cabinet 2, a supply air duct 3, an electrical control cabinet 1, and a controller 0 that applies the electrical control cabinet temperature control method of any one of the above embodiments; wherein, the supply air cabinet 2 is used to generate cold air, which is transmitted to the bottom of the electrical control cabinet 1 through the supply air duct 3, so that the internal equipment of the electrical control cabinet 1 is cooled, and the top of the electrical control cabinet 1 is used for heat dissipation. The purpose of accurately cooling the electrical control cabinet and improving the energy utilization efficiency can be achieved, and the technical effect of improving the temperature control efficiency of the electrical control cabinet is realized, thereby solving the technical problem of unsatisfactory temperature control efficiency of the electrical control cabinet in the related art.

[0080] Based on the above embodiments and optional embodiments, the present application proposes an optional implementation manner, providing a precise air supply system and method for secondary equipment rooms in substations based on virtual flow meters, aiming to optimize the temperature control system of secondary equipment rooms in substations to meet the high requirements of equipment operation for temperature and environmental stability, while improving energy utilization efficiency and reducing waste.

[0081] The precise air supply system for the secondary equipment room mainly includes a combined air supply cabinet (including a filtration section, a surface cooler section, a fan section, an adjustment section, and a static pressure box), an air supply duct, a return air duct, and an electrical control cabinet. After the air supply duct comes out of the air supply cabinet, the cold air enters the interior through the air supply duct and the bottom air supply opening of the electrical control cabinet to cool the internal equipment, and then goes out through the heat dissipation fan at the top of the electrical control cabinet.

[0082] Based on the idea of virtual flow meters, combined with simulation data and deep learning models, the real-time flow rate and valve opening of the air supply system are dynamically adjusted to ensure the constancy of the temperature of the electrical control cabinet.

[0083] First, use numerical simulation software to establish a precise air supply simulation model for the secondary equipment room. According to the actual physical structure and air supply system layout, simulate the air supply conditions under different working conditions to generate a large-scale data set. These data include parameters such as the main air duct flow rate, the valve opening and flow rate of each branch duct, etc.

[0084] Then, after processing the above data, it is used to train a deep learning model. Taking the main air duct flow rate and the branch duct valve opening as inputs and the flow rate of each branch duct as outputs, the model is optimized through the mean square error, and finally a non-linear mapping relationship between the input and output is established.

[0085] Next, the surface temperature of the device, the indoor temperature, the main air duct flow rate, and the branch valve opening are monitored by sensors. These real-time data are input into the above-mentioned deep learning model to predict the real-time flow rate of each branch. At the same time, according to the set target temperature, the real-time heat dissipation of the device is calculated, and then the target flow rate is determined. By comparing the deviation between the actual flow rate and the target flow rate, the valve opening is dynamically adjusted. The adjustment of the valve opening is realized by a control algorithm, so as to accurately control the air supply volume. The system can optimize the air supply volume distribution in real time under the conditions of changes in the device heat dissipation load and the indoor environment, ensuring the stability of the device temperature and improving the energy utilization efficiency.

[0086] The following is an example for an application scenario. Based on the secondary equipment room of an 110 kV indoor substation in a certain area, there are three rows of electrical equipment in the room, and each row contains 8 electrical switchboards, as shown in the appendix Figure 1 As shown, an air inlet is provided at the bottom of each electrical switchboard, and a heat dissipation exhaust fan is provided at the top. Combining the above structure, the precise air supply system mainly includes a combined air supply cabinet (including a filtration section, a surface cooler section, a fan section, an adjustment section, and a static pressure box), an air supply duct, a return air duct, and an air valve. The specific structure is as shown in the appendix Figure 2 As shown. After the cold air comes out of the air supply cabinet, it passes through the air supply duct and enters the interior from the bottom air supply opening of the electrical switchboard to cool the internal equipment, and then goes out through the heat dissipation fan at the top of the electrical switchboard. An air valve is installed on each air supply branch to facilitate precise control of a single device. The exhaust opening is located on the roof to preferentially discharge hot air.

[0087] First, according to the actual physical structure of the secondary equipment room of an 110 kV indoor substation in a certain area and the actual layout of the precise air supply system, a three-dimensional physical model is established using software such as Space Claim (a three-dimensional modeling software). Then, the fluid region of the three-dimensional model is meshed by Meshing software (a mesh generation software). To ensure the simulation effect, the overall mesh quality is made above 0.7. Next, the model is imported into Fluent software (a software tool applied to computational fluid dynamics simulation). In this case, Ansys Fluent 2021R2 numerical simulation software is preferably used, and the following assumptions are made:

[0088] (1) The fluid flow in this case is three-dimensional, steady-state, and incompressible flow.

[0089] (2) The influence of external environmental changes on the indoor flow field is ignored.

[0090] (3) The change in air density caused by temperature adopts the Boussinesq assumption. The core idea of the Boussinesq assumption is that in fluid flow and heat transfer problems, the density in all equations except the buoyancy term in the momentum equation is assumed to be constant.

[0091] (4) The walls, floor, and roof are all adiabatic boundaries.

[0092] In the Fluent settings, the indoor fluid medium is air, and the pipe materials and electrical equipment materials are both aluminum. Considering the calculation accuracy and solution cost, the standard k-ε turbulence model is used for the solution, and the DO radiation model is used for the indoor radiation heat transfer calculation. The DO radiation model (Discrete Ordinates Model) is a numerical method for calculating radiation heat transfer and is widely used in radiation problems with complex geometries and non-uniform media. The direction of the gravitational acceleration is opposite to the Y-axis and is set to -9.81 m / s. The coupled algorithm and the second-order upwind discretization scheme are adopted. The heat flux density boundary condition is used on the equipment surface (such as the heat flux density is 200 W / m 2 ), the supply air outlet is a mass flow inlet, the air outlet is a pressure outlet (ambient atmospheric pressure), and the return air outlet is a mass flow outlet.

[0093] By simulating different working conditions (such as different total supply air volumes: 5.6 kg / s, 4.6 kg / s, 3.6 kg / s, 2.6 kg / s; and different valve openings: 0.2, 0.4, 0.6, 0.7, 1.0), record the main duct flow rate Q total and the flow rates Q i in each branch duct.

[0094] Specifically implement a virtual flow meter based on a neural network. Use multiple sets of data generated by CFD simulation to train the neural network model and establish a non-linear relationship between the input and output.

[0095] First, normalize the data to a fixed range (such as [0.1]), and divide the CFD dataset into a training set (70%), a validation set (15%), and a test set (15%). Then, use the main duct flow rate Q total and the valve openings A i of each branch as the output values, and the flow rate Q i of each branch as the output value to construct a deep learning framework, and use the mean square error to measure the deviation between the predicted value and the true value. Next, input the preprocessed data into the neural network for training, use the validation set to evaluate the model performance, and use the test set to evaluate the model accuracy.

[0096] Collect temperature, damper opening, and supply air parameters in real time through sensors. Specifically, arrange temperature sensors to monitor the temperature T a inside the secondary equipment electrical cubicle, the indoor temperature T room and the supply air temperature T in ; arrange flow sensors in the main pipeline to monitor the actual flow rate Q z of the main pipeline; and monitor the valve openings A of each branch in real time. Ensure that the data collection frequency is high enough (such as 5 s) to capture dynamic changes.

[0097] Set the target temperature and flow rate:

[0098] (1) Set the target temperature T inside the electrical cabinet set (such as T set = 25 °C), and calculate the actual temperature T inside each electrical cabinet in real time real and the deviation ΔT from the target temperature T set :

[0099] ΔT = T real - T set

[0100] (2) Set the target flow rate Q for each electrical cabinet set .

[0101] First, calculate the real-time heat dissipation Qload of the equipment according to the real-time monitored equipment temperature T a and the indoor temperature T room :

[0102] Q load = h·F·(T a - T room )

[0103] where h is the heat transfer coefficient (such as h = 5 W / m 2 ·K); F is the heat transfer area (such as F = 2 m 2 ).

[0104] Then, combine the real-time heat dissipation Q load of the equipment with the set target temperature T set to calculate the real-time target flow rate Q set :

[0105]

[0106] Finally, use the trained neural network model to predict the branch pipe flow rate Q z in real time by inputting the actual flow rate Q of the main pipeline in real time and the valve opening A of each branch pipe. And calculate the deviation ΔQ between the real-time flow rate and the target flow rate of each branch pipe in real time: real

[0107] ΔQ = Q real - Q set

[0108] Judge the increase or decrease of the valve opening according to the deviation ΔT between the actual temperature T real inside each electrical cabinet and the target temperature T set :

[0109] ​If the surface temperature of the equipment is too high (ΔT > 0), increase the air supply volume (increase the valve opening A);

[0110] If the surface temperature of the equipment is too low (ΔT < 0), decrease the air supply volume (decrease the valve opening A).

[0111] The specific value of the valve opening A is adjusted using the PID control algorithm:

[0112]

[0113] where A new is the adjusted air valve opening, with a range of 0 - 1; A current is the current air valve opening. K P 、K i 、K d are the proportional, integral, and derivative gain coefficients respectively. When ΔQ is large, the proportional term K P increases rapidly to provide more cold air. The integral term K i is used to eliminate the accumulated flow error to ensure long-term stability. The derivative term K d suppresses rapid fluctuations in flow and prevents over-regulation of the air valve. According to the flow deviation and the PID controller, the valve opening A is adjusted in real time to keep the surface temperature of the equipment and the indoor temperature stable.

[0114] The above optional implementation methods can achieve the following technical effects: (1) Precise cooling, improving the operation stability of the equipment: By combining the internal structure characteristics of the electrical cabinet, this application directly guides the cold air to the high heat density area of the heating equipment, achieving "cooling the equipment first and then the environment". This precise air supply method effectively reduces the temperature fluctuation of the core components inside the cabinet, improves the operation stability and safety of the equipment, and significantly reduces the risk of failures caused by overheating.

[0115] (2) Reducing system costs and improving system reliability: Using the CFD model to construct a virtual flow meter, accurately simulating the relationship between the flow rate, pressure, velocity and other parameters in the air duct, replacing the traditional physical flow meter, achieving high-precision estimation of the air supply flow rate, greatly reducing the installation and maintenance costs, and integrating various real-time monitoring parameters to form a closed-loop feedback control, improving the anti-interference ability and operation stability of the system.

[0116] (3) Strengthening the intelligent management of the substation: Automatically adjusting the air supply volume distribution according to different equipment loads and environmental temperatures, improving energy use efficiency and extending the equipment life. It can be integrated with Internet of Things technology to achieve remote monitoring and centralized management, laying a foundation for the temperature control management of modern intelligent substations.

[0117] In this embodiment, a temperature control device for an electrical switchgear cabinet is further provided. This device is used to implement the above-mentioned embodiments and preferred implementation manners, and those that have been described will not be repeated here. As used hereinafter, the terms "module" and "device" may refer to a combination of software and / or hardware that can achieve a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, implementation in hardware, or a combination of software and hardware is also possible and contemplated.

[0118] According to an embodiment of the present application, an embodiment of a device for implementing the electrical switchgear cabinet temperature control method is also provided. Figure 5 It is a schematic diagram of a temperature control device for an electrical switchgear cabinet according to an embodiment of the present application. As Figure 5 shown, the above-mentioned temperature control device for an electrical switchgear cabinet includes: a flow rate acquisition module 502, a deviation determination module 504, a temperature acquisition module 506, and an opening adjustment module 508. The device will be described below.

[0119] The flow rate acquisition module 502 is configured to obtain the actual flow rate of the branch pipeline based on the actual main flow rate of the main air duct and the initial valve opening of the branch pipeline. Among them, the branch pipeline and the main air duct belong to the air supply path, and the branch pipeline is used to supply air for cooling the corresponding electrical switchgear cabinet.

[0120] The deviation determination module 504 is connected to the flow rate acquisition module 502 and is configured to determine the flow rate deviation between the actual branch flow rate and the target flow rate of the branch pipeline.

[0121] The temperature acquisition module 506 is connected to the deviation determination module 504 and is configured to acquire the surface temperature of the equipment inside the electrical switchgear cabinet.

[0122] The opening adjustment module 508 is connected to the temperature acquisition module 506 and is configured to determine the target valve opening of the branch pipeline according to the temperature deviation and the flow rate deviation between the surface temperature of the equipment and the target temperature.

[0123] In a temperature control device for an electrical switchgear cabinet provided by an embodiment of the present application, a flow rate acquisition module 502 is provided, which is used to obtain the actual flow rate of a branch pipeline based on the actual main flow rate of the main air duct and the initial valve opening of the branch pipeline. The branch pipeline and the main air duct belong to the air supply path, and the branch pipeline is used to supply air for cooling the corresponding electrical switchgear cabinet; a deviation determination module 504, connected to the flow rate acquisition module 502, is used to determine the flow rate deviation between the actual branch flow rate and the target flow rate of the branch pipeline; a temperature acquisition module 506, connected to the deviation determination module 504, is used to acquire the surface temperature of the equipment inside the electrical switchgear cabinet; an opening adjustment module 508, connected to the temperature acquisition module 506, is used to determine the target valve opening of the branch pipeline according to the temperature deviation and the flow rate deviation between the surface temperature of the equipment and the target temperature. The purpose of precisely cooling the electrical switchgear cabinet and improving the energy utilization efficiency is achieved, and the technical effect of improving the temperature control efficiency of the electrical switchgear cabinet is realized, thereby solving the technical problem of unsatisfactory temperature control efficiency of the electrical switchgear cabinet in the related art.

[0124] It should be noted that the above-mentioned various modules can be implemented by software or hardware. For example, for the latter, it can be implemented in the following manner: the above-mentioned various modules can be located in the same processor; or, the above-mentioned various modules are located in different processors in any combination.

[0125] It should be noted here that the above-mentioned flow rate acquisition module 502, deviation determination module 504, temperature acquisition module 506, and opening adjustment module 508 correspond to steps S102 to S108 in the embodiment. The examples and application scenarios implemented by the above-mentioned modules and the corresponding steps are the same, but are not limited to the content disclosed in the above-mentioned embodiment. It should be noted that the above-mentioned modules can run in a computer terminal as part of the device.

[0126] It should be noted that the optional or preferred implementation manners of this embodiment can be referred to the relevant descriptions in the embodiment, and will not be elaborated here.

[0127] The above-mentioned temperature control device for an electrical switchgear cabinet may further include a processor and a memory. The flow rate acquisition module 502, deviation determination module 504, temperature acquisition module 506, opening adjustment module 508, etc. are all stored in the memory as program units, and the processor executes the above-mentioned program units stored in the memory to implement corresponding functions.

[0128] The processor contains a kernel, and the kernel retrieves the corresponding program units from the memory. One or more kernels can be set. The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of, for example, read-only memory (ROM) or flash memory (flash RAM), and the memory includes at least one storage chip.

[0129] An embodiment of the present application provides a non-volatile storage medium, on which a program is stored, and when the program is executed by a processor, it implements an electrical switchgear temperature control method.

[0130] An embodiment of the present application provides an electronic device, which includes a processor, a memory, and a program stored on the memory and executable on the processor. When the processor executes the program, the following steps are implemented: obtaining the actual flow rate of a branch pipe based on the actual main flow rate of a main air duct and the initial valve opening of the branch pipe, where the branch pipe and the main air duct belong to an air supply path, and the branch pipe is used to supply air for cooling a corresponding electrical switchgear; determining the flow deviation between the actual branch flow rate and the target flow rate of the branch pipe; obtaining the surface temperature of the equipment inside the electrical switchgear; and determining the target valve opening of the branch pipe according to the temperature deviation between the surface temperature of the equipment and the target temperature, and the flow deviation. The equipment herein may be a server, a PC, etc.

[0131] The present application also provides a computer program product, which, when executed on a data processing device, is adapted to execute a program initialized with the following method steps: obtaining the actual flow rate of a branch pipe based on the actual main flow rate of a main air duct and the initial valve opening of the branch pipe, where the branch pipe and the main air duct belong to an air supply path, and the branch pipe is used to supply air for cooling a corresponding electrical switchgear; determining the flow deviation between the actual branch flow rate and the target flow rate of the branch pipe; obtaining the surface temperature of the equipment inside the electrical switchgear; and determining the target valve opening of the branch pipe according to the temperature deviation between the surface temperature of the equipment and the target temperature, and the flow deviation.

[0132] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore, the present application can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0133] The present application is described with reference to the flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, and the combination of flows and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing devices generate for implementing in the process Figure 1one or more processes and / or blocks Figure 1 a device for the functions specified in one or more blocks.

[0134] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, such that the instructions stored in the computer-readable memory produce a manufactured article including an instruction device that implements the functions in the process Figure 1 one or more processes and / or blocks Figure 1 specified in one or more blocks.

[0135] These computer program instructions can also be loaded onto a computer or other programmable data processing device, such that a series of operation steps are executed on the computer or other programmable device to produce a computer-implemented process, and thus the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in the process Figure 1 one or more processes and / or blocks Figure 1 specified in one or more blocks.

[0136] In a typical configuration, a computing device includes one or more processors (CPUs), an input / output interface, a network interface, and memory.

[0137] The memory may include non-permanent memory in the form of computer-readable media, random access memory (RAM) and / or non-volatile memory such as read-only memory (ROM) or flash memory (flash RAM). The memory is an example of computer-readable media.

[0138] Computer-readable media includes permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology for information storage. The information can be computer-readable instructions, data structures, program modules, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassettes, magnetic tape disk storage or other magnetic storage devices, or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer-readable media does not include transitory computer-readable media such as modulated data signals and carrier waves.

[0139] It should also be noted that the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, commodity or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, commodity or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, commodity or device comprising the element.

[0140] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, system or computer program product. Therefore, the present application can take the form of a complete hardware embodiment, a complete software embodiment or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0141] The above are only embodiments of the present application and are not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the scope of the claims of the present application.

Claims

1. A method for controlling the temperature of an electrical cabinet, characterized in that: include: Based on the actual main flow of the main air duct and the initial valve opening of the branch pipe, the actual flow of the branch pipe is obtained, wherein the branch pipe and the main air duct belong to the air supply path, and the branch pipe is used to supply air and cool the corresponding electrical cabinet; Determining a flow deviation between an actual branch flow and a target flow of the branch pipeline; Obtaining the surface temperature of the equipment in the electrical cabinet; The target valve opening of the branch pipeline is determined according to the temperature deviation between the surface temperature of the equipment and the target temperature, and the flow deviation.

2. The method according to claim 1, characterized in that The actual flow of the branch pipe is obtained based on the actual main flow of the main air duct and the initial valve opening of the branch pipe, including: The actual main flow and the initial valve opening are input, and the trained virtual flowmeter model is used to process them to obtain the actual flow, wherein the trained virtual flowmeter model is used to establish a nonlinear relationship between the actual main flow and the initial valve opening and the actual flow.

3. The method according to claim 2, characterized in that The method further comprises: Obtaining the historical main flow of the main air duct, the historical valve opening of the branch pipe, and the historical branch flow of the branch pipe; Inputting the historical main flow and the historical valve opening into a virtual flowmeter model for training to obtain a predicted branch flow of the branch pipeline; Based on the historical branch flow and the predicted branch flow, the virtual flow meter model is updated to obtain the trained virtual flow meter model.

4. The method according to claim 1, characterized in that: Determining the target valve opening of the branch pipeline according to the temperature deviation between the surface temperature of the equipment and the target temperature, and the flow deviation, comprises: Based on the temperature deviation and the flow deviation, a closed-loop control algorithm is used to adjust the initial valve opening to obtain the target valve opening, wherein the closed-loop control algorithm includes a proportional gain coefficient, an integral gain coefficient, and a differential gain coefficient, the proportional gain coefficient is used to respond to flow changes, the integral gain coefficient is used to eliminate flow errors, and the differential gain coefficient is used to suppress flow fluctuations.

5. The method according to any one of claims 1 to 4, characterized in that: There are multiple electrical cabinets, and the multiple electrical cabinets share a main pipeline. The multiple electrical cabinets are respectively provided with air inlets at the bottom connected to the corresponding branch pipelines, and the multiple electrical cabinets are respectively provided with air outlets at the top, and the air outlets are provided with exhaust fans for discharging hot air from the corresponding electrical cabinets into the roof.

6. An electrical cabinet temperature control system, characterized in that: It comprises: an air supply cabinet, an air supply duct, an electrical screen cabinet, and a controller applying the temperature control method of the electrical screen cabinet described in any one of claims 1 to 5; wherein the air supply cabinet is used to generate cold air, which is transmitted to the bottom of the electrical screen cabinet through the air supply duct, so that the internal equipment of the electrical screen cabinet is cooled, and the top of the electrical screen cabinet is used for heat dissipation.

7. The system according to claim 6, characterized in that The air supply cabinet is provided with a filter section, a surface cooling section, a fan section, an adjustment section and a static pressure box in sequence, wherein the filter section is used to filter impurities in the air, the surface cooling section is used to absorb heat in the air through a heat exchanger, the fan section is used to push air into the air supply duct, the adjustment section is used to control the air volume of the air supply cabinet entering the air supply duct, and the static pressure box is used to balance the air pressure.

8. An electrical cabinet temperature control device, characterized in that: include: A flow acquisition module, used to obtain the actual flow of the branch pipe based on the actual main flow of the main air duct and the initial valve opening of the branch pipe, wherein the branch pipe and the main air duct belong to the air supply path, and the branch pipe is used to supply air and cool the corresponding electrical cabinet; a deviation determination module, used to determine a flow deviation between an actual branch flow and a target flow of the branch pipeline; A temperature acquisition module is used to obtain the surface temperature of the equipment in the electrical cabinet; The opening adjustment module is used to determine the target valve opening of the branch pipeline according to the temperature deviation between the surface temperature of the equipment and the target temperature, and the flow deviation.

9. A non-volatile storage medium, characterized in that: The non-volatile storage medium stores a plurality of instructions, and the instructions are suitable for being loaded by a processor and executing the electrical panel cabinet temperature control method described in any one of claims 1 to 5.

10. An electronic device, characterized in that: include: One or more processors and a memory, wherein the memory is used to store one or more programs, wherein when the one or more programs are executed by the one or more processors, the one or more processors implement the temperature control method for an electrical panel cabinet as described in any one of claims 1 to 5.

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