Regulation and control device and system for operating environment of reactive equipment of intelligent substation

Abstract

The invention discloses an intelligent substation reactive equipment operating environment regulation and control device and system, and the method comprises the steps: building an air flow model, and correcting the air flow model; according to the corrected model output, the air conditioner air outlet angle and air are dynamically adjusted; and generating a temperature and humidity field change curve and triggering threshold alarm. By accurately collecting data such as temperature and humidity and airflow around the reactive equipment, an air flow model is constructed and corrected, a scientific basis is provided for air conditioner regulation and control, and the problems of insufficient heat dissipation, condensation risk and the like in traditional regulation and control are effectively solved. The function of dynamically adjusting the air outlet angle and the air volume of the air conditioner is combined with a threshold value alarm mechanism, the stability of the equipment operation environment can be guaranteed in real time, and the fault probability caused by environment abnormity is remarkably reduced.

Description

Technical Field

[0001] The present invention relates to the field of fire safety, and in particular to a device and system for controlling the operating environment of reactive equipment in an intelligent substation. Background Art

[0002] Reactive power equipment in smart substations is key to maintaining voltage stability and compensating reactive power in power systems. Most of them operate in closed switch rooms, where the temperature, humidity, and air flow conditions of the operating environment directly affect the equipment life and operational safety.

[0003] In the existing technology, the correction of air flow models mostly relies on single-dimensional data, and does not fully combine the real-time temperature and humidity data of three-dimensional matrix nodes and the thermal radiation intensity of the equipment surface for coordinated correction.

[0004] For example, the adjustment of model parameters was not based on the convergence of the deviation between the actual measured value and the predicted value of the node, nor was the equipment heating characteristics incorporated into the model's heat source distribution parameters as a weighting factor. As a result, the revised model was unable to truly reflect the dynamic correlation between "equipment heat dissipation-air flow-ambient temperature and humidity" in the enclosed space, and the output air flow distribution had significant deviations from the actual scenario. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is to provide an intelligent substation reactive equipment operating environment control device that can truly reflect the dynamic correlation relationship of "equipment heat dissipation-air flow-ambient temperature and humidity" in a closed space.

[0006] The above technical problem is solved by the following technical solution: The present invention proposes a device for controlling the operating environment of reactive equipment in a smart substation, which includes a simulation device; and

[0007] The collecting assembly arranged on the top of the simulation device comprises a connecting pipe and a fixing pipe arranged on the top of the connecting pipe; wherein,

[0008] When air flows through the fixed pipes, the simulation device collects air flow data, establishes an indoor air flow model, and optimizes the best heat dissipation and dehumidification path.

[0009] In a preferred embodiment of the device for controlling the operating environment of reactive equipment in a smart substation according to the present invention: the simulation device includes a shell and a connecting plate disposed on the top of the shell and connectable to the connecting pipe.

[0010] In a preferred embodiment of the device for controlling the operating environment of reactive equipment in a smart substation according to the present invention: the bottom of the connecting pipe is connected to the top of the connecting plate, and the fixing pipe is equipped with a funnel pipe.

[0011] In a preferred embodiment of the device for controlling the operating environment of reactive equipment in a smart substation according to the present invention: a heat dissipation hole is provided on one side of the shell, and the connecting pipe and the fixing pipe are perpendicular to each other.

[0012] The above technical problems are solved by the following technical solutions: The present invention proposes an intelligent substation reactive equipment operating environment control system, which includes:

[0013] Establish an air flow model and modify the air flow model;

[0014] Dynamically adjust the air outlet angle and air volume of the air conditioner based on the corrected model output;

[0015] Generate temperature and humidity field change curves and trigger threshold alarms.

[0016] In a preferred embodiment of the intelligent substation reactive equipment operating environment control system of the present invention, the modified air flow model includes:

[0017] The model parameters are dynamically modified by combining the three-dimensional matrix node data and the thermal radiation intensity of the equipment surface to obtain real-time air flow distribution.

[0018] In a preferred embodiment of the intelligent substation reactive equipment operating environment control system of the present invention: the step of dynamically adjusting the air outlet angle and air volume of the air conditioner includes:

[0019] Calculate the ratio K of the equipment surface temperature difference to the ambient temperature difference. The formula is:

[0020]

[0021] Among them, T s is the surface temperature of the equipment, T e is the ambient temperature.

[0022] In a preferred embodiment of the intelligent substation reactive equipment operating environment control system of the present invention: the step of dynamically adjusting the air outlet angle and air volume of the air conditioner further includes:

[0023] Avoid frequent starts and stops by setting the compressor start-stop interval to ≥3 minutes, and start the internal fan to blow away the waste heat when the evaporator temperature is ≥35℃, and the air valve angle change rate is ≤5° / s to prevent sudden changes in air flow.

[0024] In a preferred embodiment of the intelligent substation reactive equipment operating environment control system of the present invention: the step of triggering the threshold alarm includes:

[0025] Mark overheating risk areas based on local temperatures ≥40°C;

[0026] When the humidity gradient When the local temperature difference is ≥8°C, the condensation warning is triggered;

[0027] When the compressor runs continuously for ≥8 hours, a maintenance reminder signal will be issued.

[0028] In a preferred embodiment of the intelligent substation reactive equipment operating environment control system of the present invention: The calculation formula is:

[0029]

[0030] Among them, H1 and H2 are the humidity values ​​of two points in space, and x1 and x2 are the straight-line distances between the two points.

[0031] The beneficial effects of this invention lie in: by accurately collecting data such as temperature, humidity, and airflow around reactive equipment, constructing and correcting air flow models, and providing a scientific basis for air conditioning control, effectively addressing issues such as insufficient heat dissipation and condensation risks associated with traditional control. Its ability to dynamically adjust the air outlet angle and volume, combined with a threshold alarm mechanism, ensures a stable operating environment for equipment in real time, significantly reducing the probability of failures caused by environmental anomalies.

[0032] At the same time, the coordinated design of the device's mechanical structure and system algorithm has improved control accuracy and efficiency, reduced air-conditioning energy consumption, and extended the service life of reactive equipment, providing strong support for the safe and stable operation of smart substations. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings of the embodiments of the present invention. Obviously, the drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention. Among them:

[0034] Figure 1 The following is a structural diagram of a device for controlling the operating environment of reactive equipment in a smart substation;

[0035] Figure 2 shows a structural diagram of the simulation device;

[0036] Figure 3 shows a structural diagram of the collection component;

[0037] Figure 4 The flowchart of a smart substation reactive equipment operating environment control system is shown. DETAILED DESCRIPTION

[0038] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below with reference to specific embodiments and the accompanying drawings.

[0039] The terms used in the present invention are those commonly used in the art in view of the functions of the present invention, but these terms may vary according to the intentions of those skilled in the art, precedents, or new technologies in the art. In addition, specific terms may be selected by the applicant, and in such cases, their detailed meanings will be described in the detailed description of the present invention. Therefore, the terms used in the specification should not be understood as simple names, but rather as the meanings of the terms and the overall description of the present invention.

[0040] Reference Figures 1 to 3 This embodiment provides a device for controlling the operating environment of reactive equipment in a smart substation, comprising:

[0041] simulation device 100; and,

[0042] The collecting assembly 200 disposed on the top of the simulation device 100 includes a connecting tube 201 and a fixing tube 202 disposed on the top of the connecting tube 201;

[0043] When air flows through the fixed pipe 202 , the simulation device 100 collects air flow data, establishes an indoor air flow model, and optimizes the best heat dissipation and dehumidification path.

[0044] The simulation device 100 includes a housing 101 and a connecting plate 102 mounted on top of the housing 101 and connected to a connecting tube 201. A heat dissipation hole 103 is provided on one side of the housing 101. The connecting tube 201 and the fixing tube 202 are perpendicular to each other. The housing 101 is made of 304 stainless steel and is installed in the switch room. It integrates a temperature and humidity sensor (accuracy of ±0.5°C, ±3% RH), a wind speed sensor (range of 0-10m / s, sampling frequency of 1Hz), and a data processing module (STM32H743 microprocessor, computing speed of 2800DMIPS).

[0045] The bottom of the connecting pipe 201 is connected to the top of the connecting plate 102, and the fixed pipe 202 is installed with a funnel pipe 203, wherein the connecting pipe 201 and the fixed pipe 202 are both made of UPVC material, and the bottom is sealed and connected to the connecting plate (102) through a flange, and a flange gasket is provided in the flange, which is made of oil-resistant rubber to prevent air leakage;

[0046] The fixed pipe 202 is welded vertically to the connecting pipe to ensure that air flows in both horizontal and vertical directions. At the same time, the funnel pipe 203 installed on the top of the fixed pipe 202 can expand the air inlet area. The inner wall of the funnel is covered with sound-absorbing cotton to reduce the interference of airflow noise on the sensor.

[0047] It should be noted that when the airflow flows in the shell 101, it drives the sensors integrated in the shell, such as wind speed, temperature and humidity sensors, to capture physical parameters. These parameters are stably transmitted to the data processing module through the mechanical fixing structure inside the shell, such as the sensor bracket, to provide original data support for the subsequent establishment of the air flow model.

[0048] In summary, by combining the airflow turbulence characteristics collected by the fixed tube 202 and the connecting tube 201 and the internal and external air pressure data after balancing the heat dissipation holes 103 of the shell 101, the model can accurately output the dynamic correlation between "equipment heat dissipation and air flow" and provide the data to the air conditioning system, providing a core basis for the air duct layout and air outlet angle adjustment of the air conditioning system.

[0049] As an optional embodiment, another shape of the funnel tube 203 is provided.

[0050] The bottom of the connecting tube 201 is connected to the top of the connecting plate 102, and the fixed tube 202 is installed with a funnel tube 203, wherein the shape of the funnel tube 203 can be changed into a Venturi tube, and its structure is gradually shortened. The Venturi effect can be used to make the air flow velocity at the throat suddenly increase to form a local low-pressure area, thereby increasing the air collection volume.

[0051] Reference Figure 4 This embodiment provides a smart substation reactive power equipment operating environment control system, including:

[0052] Establish and modify an air flow model. By collecting physical parameters of the device's surrounding environment, a realistic airflow model is constructed to ensure that the model truly reflects the interaction between device heat dissipation and ambient airflow.

[0053] Dynamically adjust the air outlet angle and air volume of the air conditioner based on the corrected model output. Based on the corrected model output, the air outlet angle, air volume and other parameters of the air conditioner are optimized in real time, so that the cooling air / dehumidification airflow acts precisely on the equipment, improving control efficiency.

[0054] Generate temperature and humidity field change curves and trigger threshold alarms. By monitoring temperature and humidity change trends, early warnings of risks such as overheating and condensation are provided, and equipment maintenance prompts are issued to ensure long-term stable operation of the system.

[0055] Modified air flow models include:

[0056] The model parameters are dynamically corrected by combining the three-dimensional matrix node data and the surface thermal radiation intensity of the equipment, so as to obtain the real-time air flow distribution. Among them, the three-dimensional matrix node data refers to the three-dimensional grid nodes divided with the reactive power equipment as the center in the substation switch room. Each node collects data such as temperature, humidity, and air flow velocity in real time through the deployment of temperature and humidity sensors (accuracy ±1°C, ±5%RH) and wind speed sensors (range 0-10m / s), forming an environmental parameter matrix in three-dimensional space.

[0057] It should be noted that the surface thermal radiation intensity of the equipment is collected by an infrared thermal imager (sampling frequency 1Hz, resolution 640×512) on the surface of the reactive power equipment, such as the thermal radiation energy (unit: W / m 2 ) of the capacitor housing and the reactor coil, reflecting the self-heating intensity of the equipment.

[0058] Dynamic correction process: The initial model is constructed based on the basic data of the three-dimensional matrix. However, the heat generation of the equipment will change the surrounding air flow characteristics. For example, the rising hot air flow drives the surrounding air to flow. Therefore, the thermal radiation intensity needs to be converted into "heat source parameters", such as heat source temperature and heat dissipation power, and substituted into the model to correct the calculation parameters of the air flow velocity field and temperature field. Finally, the real-time air flow distribution is output, that is, the air flow direction, velocity, temperature, and humidity at each point, ensuring that the deviation between the model and the actual environment is ≤5%.

[0059] The steps for dynamically adjusting the air outlet angle and air volume of the air conditioner include,

[0060] Calculate the ratio K of the temperature difference on the equipment surface to the ambient temperature difference. The formula is:

[0061]

[0062] Among them, T s is the surface temperature of the equipment, and T e is the ambient temperature.

[0063] It should be noted that K reflects the matching degree between the heat dissipation demand of the equipment and the refrigeration / heating capacity of the air conditioner. For example: if the surface temperature of the equipment is 45°C and the ambient temperature is 30°C, after calculation K = 1.5, which means that the heat dissipation demand of the equipment is higher than the current output capacity of the air conditioner, and it is necessary to increase the air volume or adjust the angle to enhance heat dissipation.

[0064] The mapping relationship between the built-in K value of the system and the air valve angle is:

[0065]

[0066] Among them, when K ≤ 0.8, the air valve angle is set to 30°; when 0.8 < K ≤ 1.5, the angle is set to 60°; when K > 1.5, the angle is set to 90°. There is a servo motor installed in the housing 101, which can adjust the angle of the air valve to achieve an adjustment accuracy of ±1°.

[0067] The steps of dynamically adjusting the air outlet angle and air volume of the air conditioner also include:

[0068] Avoid frequent compressor starts and stops by setting the compressor start-stop interval to ≥3 minutes. The internal fan should be activated to remove excess heat when the evaporator temperature is ≥35°C, and the damper angle should be changed at a rate of ≤5° / s to prevent sudden airflow changes. The compressor must overcome the resistance of the refrigerant circulation when starting, and the instantaneous current is 3-5 times the rated current. Frequent starts and stops can cause overheating of the motor windings, accelerated wear of mechanical components (such as valves), and reduced service life. Setting a 3-minute interval can restore refrigerant system pressure to equilibrium and reduce startup shock. Alternatively, the interval can be extended.

[0069] It should also be noted that after the air conditioner is shut down, residual heat may remain on the surface of the evaporator, especially in heating mode. If it is not discharged in time, the surface temperature of the evaporator will be too high, accelerating the aging of components. At this time, start the internal fan (speed 800r / min) for 3 minutes to discharge the residual heat through the air duct, so that the evaporator temperature drops below 30°C.

[0070] It should also be noted that if the air valve angle changes rapidly, such as 10° / s, the airflow at the air outlet will suddenly increase or turn, causing turbulence in the airflow around the equipment, which will affect the heat dissipation efficiency. At the same time, rapid rotation will cause excessive force on the servo gear set and increase mechanical losses. Therefore, it is necessary to limit the rate to ensure a smooth transition of the airflow and improve the stability of the control.

[0071] The steps to trigger a threshold alarm include:

[0072] If the local temperature is ≥40°C, the overheating risk area is marked. The system monitors key points on the equipment surface, such as the temperature of capacitor terminals and reactor windings, in real time. When the local temperature is ≥40°C, the area is marked as an "overheating risk area" and highlighted in red on the monitoring interface, triggering an audible and visual alarm.

[0073] When the humidity gradient When the local temperature difference is ≥8℃, the condensation warning is triggered. If the local temperature difference is ≥8°C, the system determines that there is a risk of condensation, immediately activates the dehumidification mode, and sends an early warning message;

[0074] When the compressor runs continuously for ≥8 hours, a maintenance reminder signal will be issued. When the compressor runs continuously for ≥8 hours, the system determines that the condenser may be dusty or the refrigerant pressure may be abnormal, and automatically generates a maintenance reminder to avoid failures caused by long-term high-load operation.

[0075] The calculation formula is:

[0076]

[0077] Among them, H1 and H2 are the humidity values ​​of two points in space, and x1 and x2 are the straight-line distances between the two points.

[0078] It should be noted that, assuming that in the substation switch room, the humidity at the position close to the capacitor (point 1) is H1 = 60% RH, and the humidity at the position 1 meter away from the capacitor (point 2) is H2 = 70% RH, the straight-line distance between the two points is x2-x1 = 1 meter, substituting into the formula yields This indicates that the humidity increases by 10% RH per meter, which means that the humidity near the capacitor changes relatively quickly, and there may be a risk of condensation on the surface of the equipment. Based on this value, the system can determine whether to start dehumidification, adjust the air conditioning air volume, and other actions to ensure that the reactive equipment operates in an environment with appropriate humidity.

[0079] In summary, a three-dimensional matrix monitoring network centered on reactive equipment is first constructed in a closed switch room. Sensors and infrared thermal imagers are used to collect node environmental parameters and equipment thermal radiation intensity. Then, a dynamic collaborative correction model is established. By using deviation convergence, the node measured and predicted deviations are iteratively optimized until they converge to ≤3%. The heat source is weighted, and the thermal radiation intensity is converted into an equivalent parameter and incorporated into the model correction model. The model accuracy is then verified by comparing the measured values, and the sudden change response of heat dissipation is verified in combination with the equipment operating conditions. This allows the model to accurately reflect dynamic correlations, providing a reliable basis for fine-grained control of the equipment environment and improving equipment life and safety.

[0080] Finally, it should be pointed out that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways without departing from the scope of the present invention.

Claims

1. A device for controlling the operating environment of reactive equipment in a smart substation, characterized by: include, a simulation device (100); and, The collecting assembly (200) is arranged on the top of the simulation device (100), and comprises a connecting tube (201) and a fixing tube (202) arranged on the top of the connecting tube (201); wherein, When air flows through the fixed pipe (202), the simulation device (100) collects air flow data, establishes an indoor air flow model, and optimizes the best heat dissipation and dehumidification path.

2. The device for controlling the operating environment of reactive power equipment in a smart substation according to claim 1, characterized in that: The simulation device (100) comprises a shell (101) and a connecting plate (102) arranged on the top of the shell (101) and connectable to the connecting pipe (201).

3. The device for controlling the operating environment of reactive power equipment in a smart substation according to claim 2, characterized in that: The bottom of the connecting pipe (201) is connected to the top of the connecting plate (102), and the fixing pipe (202) is equipped with a funnel pipe (203).

4. The device for controlling the operating environment of reactive power equipment in a smart substation according to claim 3, characterized in that: A heat dissipation hole (103) is provided on one side of the housing (101), and the connecting pipe (201) and the fixing pipe (202) are perpendicular to each other.

5. A smart substation reactive equipment operating environment control system, characterized by: The method comprises the device for controlling the operating environment of reactive equipment in a smart substation according to any one of claims 1 to 3, and the following steps: Establish an air flow model and modify the air flow model; Dynamically adjust the air outlet angle and air volume of the air conditioner based on the corrected model output; Generate temperature and humidity field change curves and trigger threshold alarms.

6. The intelligent substation reactive equipment operating environment control system according to claim 5 is characterized by: The modified air flow model includes: The model parameters are dynamically modified by combining the three-dimensional matrix node data and the thermal radiation intensity of the equipment surface to obtain real-time air flow distribution.

7. The intelligent substation reactive equipment operating environment control system according to claim 6, characterized in that: The step of dynamically adjusting the air outlet angle and air volume of the air conditioner includes: Calculate the ratio K of the equipment surface temperature difference to the ambient temperature difference. The formula is: Among them, T s is the surface temperature of the equipment, T e is the ambient temperature.

8. The intelligent substation reactive equipment operating environment control system according to claim 7, characterized in that: The step of dynamically adjusting the air outlet angle and air volume of the air conditioner also includes: Avoid frequent starts and stops by setting the compressor start-stop interval to ≥3 minutes, and start the internal fan to blow away the waste heat when the evaporator temperature is ≥35℃, and the air valve angle change rate is ≤5° / s to prevent sudden changes in air flow.

9. The intelligent substation reactive equipment operating environment control system according to claim 8, characterized in that: The step of triggering a threshold alarm includes: Mark overheating risk areas based on local temperatures ≥40°C; When the humidity gradient When the local temperature difference is ≥8°C, the condensation warning is triggered; When the compressor runs continuously for ≥8 hours, a maintenance reminder signal will be issued.

10. The intelligent substation reactive equipment operating environment control system according to claim 9, characterized in that: described The calculation formula is: Among them, H1 and H2 are the humidity values ​​of two points in space, and x1 and x2 are the straight-line distances between the two points.

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