A ventilation control method, device and storage medium for a transformer and distribution room

Abstract

The embodiments of the present invention disclose a ventilation control method, device, and storage medium for a transformer substation, which are applied to the field of power system technology and can solve the problem of how to accurately control the supply and exhaust fans to ventilate the transformer substation. The method includes: continuously obtaining the actual load rate corresponding to the transformer substation at multiple moments within a preset time period; determining the total waste heat of the transformer substation within the preset time period based on the actual load rate corresponding to each moment; obtaining the outdoor air temperature value through a temperature sensor; determining the real-time ventilation frequency within the preset time period based on the total waste heat and the outdoor air temperature value; and controlling the fan to ventilate the transformer substation based on the real-time ventilation frequency.

Description

Technical Field

[0001] Embodiments of the present invention relate to the technical field of power systems, and in particular to a ventilation control method, device, and storage medium for a transformer substation. Background Art

[0002] The ventilation system within a substation typically uses manual or temperature-dependent start-up and stop-down of supply and exhaust fans to meet the substation's ventilation requirements and maintain the room's temperature within a specified range. However, manually operating the fans is labor-intensive, and ambient temperature fluctuations within the substation can vary depending on the placement of temperature sensors and heat dissipation. This can lead to erroneous ambient temperature detection or inaccurate start-up and stop of supply and exhaust fans, resulting in wide fluctuations in the substation's ambient temperature. Therefore, precisely controlling supply and exhaust fans to ventilate the substation has become a pressing issue. Summary of the Invention

[0003] The embodiments of the present invention provide a ventilation control method, device and storage medium for a transformer substation, which are used to solve the problem in the prior art of how to accurately control supply and exhaust fans to ventilate the transformer substation.

[0004] In a first aspect, a ventilation control method for a power distribution room is provided, the method comprising: continuously obtaining actual load rates corresponding to the power distribution room at multiple moments within a preset time period;

[0005] Determining the total waste heat of the power distribution room within the preset time period based on the actual load rate corresponding to each moment;

[0006] Obtain the outdoor air temperature value through the temperature sensor;

[0007] Determining the real-time ventilation frequency within the preset time period according to the total waste heat and the outdoor air temperature;

[0008] According to the real-time ventilation frequency, the fan is controlled to ventilate the power distribution room.

[0009] As an optional implementation manner, in the first aspect of the embodiment of the present invention, controlling the fan to ventilate the transformer and distribution room according to the real-time ventilation frequency includes:

[0010] If the real-time ventilation frequency is less than or equal to the rated ventilation frequency, controlling the fan to ventilate the power distribution room, wherein the rated ventilation frequency is calculated based on the rated waste heat of the power distribution room and the maximum outdoor air temperature;

[0011] If the real-time ventilation frequency is greater than the rated ventilation frequency, the fan is controlled to ventilate the substation room and an overload operation alarm is output.

[0012] As an optional implementation manner, in the first aspect of the embodiment of the present invention, continuously obtaining the actual load rate corresponding to the substation at multiple times within a preset time period includes:

[0013] within the preset time period, continuously obtaining the real-time operating current of the transformer in the power distribution room corresponding to each moment;

[0014] According to the real-time operating current at each moment, an actual load rate corresponding to the real-time operating current is determined.

[0015] As an optional implementation manner, in the first aspect of the embodiment of the present invention, determining the total waste heat of the substation within the preset time period based on the actual load rate corresponding to each moment includes:

[0016] Determining the actual heat generation at each moment according to the actual load rate corresponding to each moment;

[0017] The actual heat generation corresponding to the multiple moments within the preset time period is integrated to obtain the total waste heat of the power distribution room within the preset time period.

[0018] As an optional implementation manner, in the first aspect of the embodiment of the present invention, determining the actual heating value at each moment according to the actual load rate corresponding to each moment includes:

[0019] determining the actual heating value of the transformer according to the actual load rate and the rated heating value of the transformer;

[0020] Determine the actual heating value of the power distribution cabinet according to the actual load rate, the rated heating value of the power distribution cabinet and the number of power distribution cabinets;

[0021] The actual heating value at each moment is determined according to the actual heating value of the transformer and the actual heating value of the power distribution cabinet.

[0022] As an optional implementation manner, in the first aspect of the embodiment of the present invention, determining the real-time ventilation frequency according to the total waste heat and the outdoor air temperature includes:

[0023] The real-time ventilation frequency is determined according to the total waste heat, the outdoor air temperature value, the air heat capacity ratio, the air density, the exhaust air temperature, the room area and the room height.

[0024] As an optional implementation manner, in the first aspect of the embodiment of the present invention, determining the real-time air exchange rate based on the total waste heat, the outdoor air temperature, the air heat capacity ratio, the air density, the exhaust air temperature, the room area, and the room height includes:

[0025] Determine the real-time ventilation rate according to the first formula;

[0026] The first formula is:

[0027] Wherein, n is the real-time ventilation times, Q is the total residual heat, C p is the air heat capacity ratio, ρ is the air density, t n is the exhaust air temperature, t w is the outdoor air temperature, S is the room area, and h is the room height.

[0028] As an optional implementation, in the first aspect of the embodiment of the present invention, the fan includes: an exhaust fan and a supply fan, and the control of the fan to ventilate the transformer and distribution room includes:

[0029] Open the exhaust fan electric valve and start the exhaust fan to ventilate the power distribution room;

[0030] Open the electric valve of the blower and start the blower to ventilate the power distribution room.

[0031] As an optional implementation manner, in the first aspect of the embodiment of the present invention, after controlling the fan to ventilate the transformer and distribution room according to the real-time ventilation frequency, the method further includes:

[0032] When it is detected that the ventilation frequency reaches the real-time ventilation frequency, the fan is controlled to stop ventilating the power distribution room.

[0033] As an optional implementation, in the first aspect of the embodiment of the present invention, the fan includes: an exhaust fan and a supply fan, and controlling the fan to stop ventilating the transformer and distribution room includes:

[0034] Stop the exhaust fan and close the exhaust fan electric valve to stop ventilating the power distribution room;

[0035] Stop the blower and close the blower electric valve to stop ventilating the transformer substation.

[0036] In a second aspect, a ventilation control device for a power distribution room is provided, the ventilation control device for the power distribution room comprising: an acquisition module for continuously acquiring actual load rates corresponding to the power distribution room at multiple moments within a preset time period;

[0037] A processing module, configured to determine the total waste heat of the power transformer and distribution room within the preset time period according to the actual load rate corresponding to each moment;

[0038] The acquisition module is further configured to acquire the outdoor air temperature value via a temperature sensor;

[0039] The processing module is further configured to determine the number of air changes within the preset time period based on the total waste heat and the outdoor air temperature;

[0040] The processing module is further configured to control the fan to ventilate the transformer and distribution room according to the ventilation frequency.

[0041] In a third aspect, a ventilation control device for a power distribution room is provided, the ventilation control device for the power distribution room comprising:

[0042] a memory storing executable program code;

[0043] a processor coupled to the memory;

[0044] The processor calls the executable program code stored in the memory to execute the ventilation control method for the substation in the first aspect of the embodiment of the present invention.

[0045] In a fourth aspect, a computer-readable storage medium is provided, storing a computer program that causes a computer to execute the ventilation control method for a transformer room according to the first aspect of the present invention. The computer-readable storage medium includes a ROM / RAM, a magnetic disk, or an optical disk.

[0046] According to a fifth aspect, a computer program product is provided. When the computer program product is run on a computer, the computer is caused to execute part or all of the steps of any one of the methods according to the first aspect.

[0047] In a sixth aspect, an application publishing platform is provided, which is used to publish a computer program product, wherein when the computer program product runs on a computer, the computer is enabled to execute part or all of the steps of any one method of the first aspect.

[0048] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0049] In an embodiment of the present invention, the ventilation control device of the substation can continuously obtain the actual load rate corresponding to the substation at multiple times within a preset time period; determine the total waste heat of the substation within the preset time period based on the actual load rate corresponding to each time period; obtain the outdoor air temperature value through a temperature sensor; determine the real-time ventilation frequency within the preset time period based on the total waste heat and the outdoor air temperature; and control the fan to ventilate the substation based on the real-time ventilation frequency. Through this solution, the ventilation control device of the substation can accurately ventilate the substation based on the total waste heat and the outdoor air temperature within the preset time period to maintain the temperature within the substation. This solution is not affected by the room layout and heat diffusion, and also considers the impact of the outdoor air temperature in different seasons on the ventilation frequency. Therefore, determining a reasonable ventilation frequency can reduce the power consumption of the fan and improve the accuracy of the fan in ventilating the substation. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0051] Figure 1 This is a flow chart of the ventilation control method for a transformer room provided by an embodiment of the present invention. Figure 1 ;

[0052] Figure 2 This is a flow chart of the ventilation control method for a transformer room provided by an embodiment of the present invention. Figure 2 ;

[0053] Figure 3 This is a schematic diagram of the manual start-up process of the exhaust fan provided by an embodiment of the present invention;

[0054] Figure 4 This is a schematic diagram of a manual start-up process of a blower provided by an embodiment of the present invention;

[0055] Figure 5A This is a schematic diagram of the automatic start-up process of the supply and exhaust fan provided by the embodiment of the present invention Figure 1 ;

[0056] Figure 5B This is a schematic diagram of the automatic start-up process of the supply and exhaust fan provided by the embodiment of the present invention Figure 2 ;

[0057] Figure 5C This is a schematic diagram of the automatic start-up process of the supply and exhaust fan provided by the embodiment of the present invention Figure 3 ;

[0058] Figure 6 Schematic diagram of the installation of a fan and an electric valve provided in an embodiment of the present invention;

[0059] Figure 7 1 is a circuit diagram of a fan and an electric valve provided in an embodiment of the present invention;

[0060] Figure 8 This is a schematic diagram of the manual shutdown process of the exhaust fan provided by an embodiment of the present invention;

[0061] Figure 9 Schematic diagram of the manual shutdown process of the blower provided by an embodiment of the present invention;

[0062] Figure 10A This is a schematic diagram of the automatic stop process of the supply and exhaust fan provided by the embodiment of the present invention Figure 1 ;

[0063] Figure 10B This is a schematic diagram of the automatic stop process of the supply and exhaust fan provided by the embodiment of the present invention Figure 2 ;

[0064] Figure 10C This is a schematic diagram of the automatic stop process of the supply and exhaust fan provided by the embodiment of the present invention Figure 3 ;

[0065] Figure 11 This is a schematic diagram of an exhaust fan overload provided by an embodiment of the present invention;

[0066] Figure 12 This is a schematic diagram of an overloaded blower provided by an embodiment of the present invention;

[0067] Figure 13 This is a schematic diagram of the structure of the ventilation control device for the power distribution room provided by the embodiment of the present invention. Figure 1 ;

[0068] Figure 14 This is a schematic diagram of the structure of the ventilation control device for the power distribution room provided by the embodiment of the present invention. Figure 2 . DETAILED DESCRIPTION

[0069] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0070] The terms "first" and "second" and the like in the description and claims of the present invention are used to distinguish different objects rather than to describe a specific order of the objects.

[0071] The terms "including" and "having" and any variations thereof in the embodiments of the present invention are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatus.

[0072] It should be noted that, in the embodiments of the present invention, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present invention should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0073] The execution entity of the ventilation control method for a substation provided by an embodiment of the present invention may be the ventilation control device for the substation described above, or may be a functional module and / or functional entity within the ventilation control device for the substation that is capable of implementing the ventilation control method for the substation. The specific implementation entity may be determined based on actual usage requirements and is not limited by the embodiment of the present invention. The ventilation control device for a substation is used as an example to illustrate the ventilation control method for a substation provided by an embodiment of the present invention.

[0074] Example 1

[0075] like Figure 1 As shown, an embodiment of the present invention provides a ventilation control method for a transformer substation, which may include the following steps:

[0076] 101. Within the preset time period, continuously obtain the actual load rate corresponding to the substation at multiple times.

[0077] In an embodiment of the present invention, within a preset time period, the ventilation control device of the power substation can continuously obtain the actual load rate of the power substation to obtain the actual load rates corresponding to multiple moments.

[0078] It's important to note that the substation is a crucial component of the power transmission system. Its mission is to receive electrical energy, convert its voltage, and reduce the 35kV, 10kV, or 6kV high-voltage power transmitted from the grid to 380V / 220V, suitable for common equipment and lighting, before distributing it to the required locations. The substation houses transformers and distribution cabinets, both of which generate heat during operation. The actual load rate of the substation fluctuates in real time.

[0079] The actual load rate can be represented by any value between 0 and 1, where 0 means that the current substation is not working and has no load; and 1 means that the current substation is working at full capacity.

[0080] 102. Based on the actual load rate corresponding to each moment, determine the total waste heat of the substation within the preset time period.

[0081] In the embodiment of the present invention, the residual heat in the transformer and distribution room is related to the actual load rate. The ventilation control device of the transformer and distribution room can determine the total residual heat within a preset time period according to the actual load rate at each moment.

[0082] Optionally, the total waste heat amount of the substation within a preset time period is determined based on the actual load rate corresponding to each moment, which may specifically include: determining the actual heating value at each moment based on the actual load rate corresponding to each moment; integrating the actual heating values ​​corresponding to multiple moments within the preset time period to obtain the total waste heat amount of the substation within the preset time period.

[0083] In this optional implementation, the ventilation control device of the substation can first determine the actual heating value corresponding to each moment based on the actual load rate corresponding to each moment, so that the ventilation control device of the substation can obtain multiple actual heating values ​​within a preset time period; because the transformer and distribution cabinet will generate heat when the substation is working, and the heat will not spread outside the substation, the ventilation control device of the substation can integrate the multiple actual heating values ​​to obtain the total waste heat of the substation within the preset time period.

[0084] Optionally, the ventilation control device of the substation can upload multiple actual heating values ​​within a preset time period to a programmable logic controller (PLC). The PLC can then plot the relationship between the multiple actual heating values ​​and time using a curve, and then integrate the multiple actual heating values, that is, calculate the area of ​​the region formed by the curve and the horizontal axis, thereby obtaining the total waste heat of the substation within the preset time period.

[0085] Furthermore, the actual heating value at each moment is determined based on the actual load rate corresponding to each moment, which may specifically include: determining the actual heating value of the transformer based on the actual load rate and the rated heating value of the transformer; determining the actual heating value of the distribution cabinet based on the actual load rate, the rated heating value of the distribution cabinet and the number of distribution cabinets; determining the actual heating value at each moment based on the actual heating value of the transformer and the actual heating value of the distribution cabinet.

[0086] In this optional implementation, since the transformer and distribution cabinet are installed in the substation, the transformer and the distribution cabinet generate heat during operation. Therefore, the ventilation control device of the substation needs to calculate the actual heating value of the transformer and the actual heating value of the distribution cabinet. The calculation of the actual heating value of the transformer and the actual heating value of the distribution cabinet is related to the actual load rate of the substation.

[0087] Optionally, the actual heating value of the transformer is calculated based on the actual load rate and the rated heating value of the transformer, that is, the actual heating value of the transformer = actual load rate * rated heating value of the transformer, where the rated heating value of the transformer is the heating value of the transformer when the substation is fully loaded, that is, the heating value generated by the transformer when the load rate is 1.

[0088] Optionally, the actual heating value of the distribution cabinet is calculated based on the actual load rate, the rated heating value of the distribution cabinet, and the number of distribution cabinets, that is, the actual heating value of the distribution cabinet = actual load rate 2 *Rated heat output of distribution cabinet*number of distribution cabinets, where the rated heat output of distribution cabinet is the heat output of one distribution cabinet when the substation is fully loaded, that is, the heat output of one distribution cabinet when the load rate is 1.

[0089] It should be noted that in the actual operation of the power distribution room, one transformer can control multiple distribution cabinets, and there are generally multiple transformers installed in the power distribution room.

[0090] Furthermore, when there are multiple transformers and their associated distribution cabinets, it is only necessary to calculate the actual heating value of each transformer and each distribution cabinet separately, and add up the actual heating values ​​of all transformers and distribution cabinets to obtain the actual heating value of the transformer and distribution room at the current moment.

[0091] 103. Obtain the outdoor air temperature value through the temperature sensor.

[0092] In the embodiment of the present invention, the ventilation control device of the transformer and distribution room can obtain the outdoor air temperature value according to the temperature sensor.

[0093] Optionally, a temperature sensor can be set at the air inlet of the blower to detect the outdoor air temperature value.

[0094] 104. Determine the real-time ventilation frequency within a preset time period based on the total waste heat and the outdoor air temperature.

[0095] In an embodiment of the present invention, since the ventilation control device of the substation room can ventilate the substation room, it is necessary to transfer the hot air in the substation room to the outside and the air outside the substation room to the indoors. Therefore, the ventilation control device of the substation room can determine the real-time ventilation times within a preset time period based on the total waste heat in the substation room and the outdoor air temperature value.

[0096] It should be noted that when the total residual heat is large, the real-time ventilation frequency may be large, that is, more ventilation is required to dissipate all the residual heat in the transformer and distribution room; when the total residual heat is small, the real-time ventilation frequency may be small, that is, fewer ventilation is required to dissipate all the residual heat in the transformer and distribution room.

[0097] It should be noted that when the outdoor air temperature value is high, the real-time ventilation frequency may be large, that is, more ventilation is required to maintain the temperature balance between indoor and outdoor; when the outdoor air temperature value is low, the real-time ventilation frequency may be small, that is, fewer ventilation is required to maintain the temperature balance between indoor and outdoor.

[0098] 105. Control the fan to ventilate the substation room according to the real-time ventilation frequency.

[0099] In an embodiment of the present invention, in order to achieve ventilation and air exchange in the substation room, the ventilation control device of the substation room needs to set a fan in the substation room. The ventilation control device of the substation room can control the fan to ventilate the substation room, that is, the ventilation control device of the substation room can control the fan to start according to the real-time ventilation frequency.

[0100] Optionally, the fan is controlled to ventilate the transformer substation room according to the real-time ventilation frequency, which may specifically include: comparing the real-time ventilation frequency with the rated ventilation frequency, and controlling the fan to ventilate the transformer substation room according to the comparison result.

[0101] In this implementation, the rated air change rate is calculated based on the rated waste heat of the substation and the maximum outdoor air temperature. The ventilation control device of the substation can control the fan to ventilate the substation based on the comparison result between the real-time air change rate and the rated air change rate.

[0102] Among them, the rated waste heat of the substation room is the waste heat when the transformers and distribution cabinets in the substation room are working at the rated heat output.

[0103] The rated total waste heat of a substation room primarily comes from the heat generated by the substation system and its auxiliary equipment. Once the power supply plan is determined, the rated waste heat within the substation room is also determined. However, the substation system does not always operate at rated capacity. The load curve fluctuates significantly during different times of the day and seasons. For example, residential electricity consumption peaks in the evening, while it is low during the day. Similarly, residential electricity consumption peaks in the summer, while it is low in the winter.

[0104] There are two specific situations:

[0105] Case 1: If the real-time air exchange rate is less than or equal to the rated air exchange rate, the fan is controlled to ventilate the substation room.

[0106] In this case, since the rated air changes are calculated based on the maximum outdoor air temperature, and the actual outdoor air temperature will not exceed the maximum outdoor air temperature, if the real-time air changes are less than or equal to the rated air changes, it can be said that the total waste heat in the current substation is less than the rated waste heat, which means that the transformers and distribution cabinets in the current substation are operating normally and are not overloaded. At this time, the ventilation control device of the substation controls the fan to ventilate the substation according to the real-time air changes.

[0107] Case 2: If the real-time ventilation frequency is greater than the rated ventilation frequency, the fan is controlled to ventilate the substation and an overload alarm is output.

[0108] In this case, since the rated ventilation rate is calculated based on the maximum outdoor air temperature, and the actual outdoor air temperature will not exceed the maximum outdoor air temperature, if the real-time ventilation rate is greater than the rated ventilation rate, it can be said that the total waste heat in the current substation is greater than the rated waste heat, which means that the transformer and distribution cabinet in the current substation are operating abnormally and are overloaded. At this time, the ventilation control device of the substation controls the fan to ventilate the substation according to the real-time ventilation rate, and immediately outputs an overload alarm to prompt the staff to check the transformer and distribution cabinet in the substation.

[0109] Optionally, if the real-time ventilation times are less than 1, the ventilation control device of the substation does not control the fan to ventilate the substation, and accumulates the total waste heat of the substation within the preset time period into the next preset time period for calculation.

[0110] An embodiment of the present invention provides a ventilation control method for a substation. The ventilation control device of the substation can continuously obtain the actual load rate of the substation at multiple times within a preset time period; determine the total waste heat of the substation within the preset time period based on the actual load rate at each time period; obtain the outdoor air temperature value through a temperature sensor; determine the real-time ventilation frequency within the preset time period based on the total waste heat and the outdoor air temperature; and control the fan to ventilate the substation based on the real-time ventilation frequency. Through this solution, the ventilation control device of the substation can accurately perform ventilation of the substation based on the total waste heat and the outdoor air temperature within the preset time period to maintain the temperature within the substation. This solution is not affected by the room layout and heat diffusion, and also considers the impact of outdoor air temperature in different seasons on the ventilation frequency. Therefore, determining a reasonable ventilation frequency can reduce the power consumption of the fan and improve the accuracy of the fan ventilation of the substation.

[0111] Example 2

[0112] like Figure 2 As shown, an embodiment of the present invention provides a ventilation control method for a transformer substation, which may further include the following steps:

[0113] 201. Within a preset time period, continuously obtain the real-time operating current corresponding to the transformer in the power distribution room at each moment.

[0114] In an embodiment of the present invention, a transformer is provided in the substation room, and a current transformer is provided at the outlet end of the transformer. Through the current transformer, the ventilation control device of the substation room can obtain the real-time operating current corresponding to each moment within a preset time period in real time.

[0115] 202. According to the real-time operating current at each moment, determine the actual load rate corresponding to the real-time operating current.

[0116] In the embodiment of the present invention, there is a corresponding relationship between current and load rate, so the ventilation control device of the substation can determine the actual load rate corresponding to the real-time operating current according to the real-time operating current at each moment.

[0117] Optionally, the ventilation control device of the power distribution room can send the real-time operating current corresponding to each moment to the PLC, and the PLC can calculate the actual load rate corresponding to the real-time operating current based on the real-time operating current corresponding to each moment, and send it to the ventilation control device of the power distribution room.

[0118] 203. Determine the total waste heat of the substation within a preset time period based on the actual load rate corresponding to each moment.

[0119] 204. Obtain the outdoor air temperature value through the temperature sensor.

[0120] In the embodiment of the present invention, for the description of steps 203 to 204, please refer to the detailed description of steps 102 to 103 in the first embodiment, which will not be repeated in this embodiment of the present invention.

[0121] 205. Determine the real-time ventilation rate based on the total waste heat, outdoor air temperature, air heat capacity ratio, air density, exhaust air temperature, room area and room height.

[0122] In an embodiment of the present invention, the ventilation control device of the transformer and distribution room can determine the real-time ventilation frequency according to the total waste heat, outdoor air temperature, air heat capacity ratio, air density, exhaust temperature, room area and room height.

[0123] Among them, the air heat capacity ratio, air density, exhaust temperature, room area and room height are all fixed values.

[0124] Optionally, determining the real-time ventilation frequency according to the total waste heat, the outdoor air temperature, the air heat capacity ratio, the air density, the exhaust air temperature, the room area, and the room height may specifically include: determining the real-time ventilation frequency according to the first formula;

[0125] The first formula is:

[0126] Among them, n is the real-time ventilation times, Q is the total waste heat, C p is the air heat capacity ratio, ρ is the air density, t n is the exhaust air temperature, t w is the outdoor air temperature, S is the room area, and h is the room height.

[0127] In this implementation, the ventilation control device of the substation can input the total waste heat, outdoor air temperature, air heat capacity ratio, air density, exhaust temperature, room area and room height into the first formula according to the first formula to obtain the real-time ventilation rate.

[0128] Among them, the air heat capacity ratio Air density ρ = 1.29 kg / m 3 ; Exhaust air temperature t n =40℃; the room area and room height are the area and height of the transformer room.

[0129] 206. According to the real-time ventilation frequency, open the exhaust fan electric valve and start the exhaust fan to ventilate the substation room.

[0130] In an embodiment of the present invention, the fan may include a supply fan and an exhaust fan. The supply fan is a fan that delivers outdoor air into the room, and the exhaust fan is a fan that exhausts indoor air out of the room. When the ventilation control device of the substation ventilates the substation based on the real-time ventilation frequency, it may first open the exhaust fan electric valve and then start the exhaust fan.

[0131] Optional, such as Figure 3 The figure shows the manual start-up process of the exhaust fan.

[0132] 207. Open the electric valve of the air blower and start the air blower to ventilate the substation room.

[0133] In an embodiment of the present invention, when the ventilation control device of the transformer and distribution room ventilates the transformer and distribution room according to the real-time ventilation frequency, it can also first open the electric valve of the blower and then start the blower.

[0134] Optional, such as Figure 4 The figure shows the manual start-up process of the blower.

[0135] Optional, such as Figures 5A-5C The figure shows a schematic diagram of the automatic start-up process of the supply and exhaust fans, wherein the automatic start-up process of the supply and exhaust fans is mainly divided into three parts, namely 501, 502 and 503, and there is a sequential relationship between the three parts.

[0136] Optional, such as Figure 6 FIG. 1 is a schematic diagram of the installation of the fan and the electric valve. The fan 61 is further provided with a fan electric valve 62, and the exhaust fan 63 is further provided with an exhaust fan electric valve 64. Figure 7 Shown is the circuit diagram of the fan and electric valve.

[0137] 208. When it is detected that the ventilation frequency reaches the real-time ventilation frequency, the fan is controlled to stop ventilating the substation room.

[0138] In an embodiment of the present invention, the ventilation control device of the substation can count the number of ventilation times when controlling the fan to ventilate the substation. When it is detected that the number of ventilation times reaches the real-time ventilation time, the fan is controlled to stop ventilating the substation.

[0139] Optionally, the ventilation control device of the substation can time the ventilation time when controlling the fan to ventilate the substation. When it is detected that the ventilation time reaches the real-time ventilation time corresponding to the real-time ventilation number, the fan is controlled to stop ventilating the substation.

[0140] For example, there's a corresponding relationship between the number of air changes and the duration of each air change. If the number of air changes is n times / hour, then the duration of each air change is h / n. For example, if the ventilation rate for a power distribution room is 20 times / hour, then the duration of each air change is 3 minutes. Based on this equivalent relationship, the time required to complete m air changes is m × h / n. Therefore, the ventilation control device in the power distribution room can control the fan to stop running when the fan operating time reaches m × h / n.

[0141] Optionally, the ventilation control device of the substation room can also detect the temperature value in the substation room in real time. When it is detected that the temperature value in the substation room reaches a preset temperature threshold, the fan is controlled to stop ventilating the substation room.

[0142] Optionally, controlling the fan to stop ventilating the substation room may specifically include: stopping the exhaust fan and closing the exhaust fan electric valve to stop ventilating the substation room; stopping the supply fan and closing the supply fan electric valve to stop ventilating the substation room.

[0143] It should be noted that fans can include supply fans and exhaust fans. Supply fans are fans that bring outdoor air into the room, while exhaust fans are fans that exhaust indoor air out of the room. When the ventilation control device in the substation controls the fans to stop ventilating the substation, it must first stop the exhaust and supply fans, and then close the electric valves for the exhaust and supply fans.

[0144] Optional, such as Figure 8 The following is a schematic diagram of the exhaust fan manual shutdown process; Figure 9 The figure shows the manual shutdown process of the blower.

[0145] Optional, such as Figures 10A-10C The figure shows a schematic diagram of the automatic stop process of the supply and exhaust fans, wherein the automatic stop process of the supply and exhaust fans is mainly divided into three parts, namely 1001, 1002 and 1003, and there is a sequential relationship between the three parts.

[0146] Optional, such as Figure 11 The figure shows the exhaust fan overload diagram; Figure 12 Shown is a schematic diagram of blower overload.

[0147] An embodiment of the present invention provides a ventilation control method for a substation. The ventilation control device of the substation can continuously obtain the actual load rate corresponding to the substation at multiple moments within a preset time period; determine the total waste heat of the substation within the preset time period based on the actual load rate corresponding to each moment; obtain the outdoor air temperature value through a temperature sensor; determine the real-time ventilation frequency within the preset time period based on the total waste heat and the outdoor air temperature; and control the fan to ventilate the substation based on the real-time ventilation frequency. Further, in this solution, the actual load rate of the substation is determined by the real-time current of the transformer, thereby improving the accuracy of the load rate and waste heat calculation of the substation; and, by jointly calculating the ventilation frequency based on multiple parameters, the rationality of the ventilation frequency in the current environment can be improved; and electric valves are respectively provided in the supply and exhaust fans to prevent power loss caused by the supply and exhaust fans being opened by mistake. Through this solution, the ventilation control device of the substation can accurately ventilate the substation according to the total waste heat of the substation within a preset time and the outdoor air temperature value, so as to maintain the temperature in the substation. This will not be affected by the room layout and heat diffusion, and the influence of the outdoor air temperature in different seasons on the ventilation frequency is also considered. Therefore, determining a reasonable ventilation frequency can reduce the power consumption of the fan and improve the accuracy of the fan in ventilating the substation.

[0148] Example 3

[0149] like Figure 13 As shown, an embodiment of the present invention provides a ventilation control device for a power distribution room, the ventilation control device for the power distribution room comprising:

[0150] The acquisition module 1301 is used to continuously acquire the actual load rates corresponding to the power distribution room at multiple times within a preset time period;

[0151] Processing module 1302, configured to determine the total waste heat of the power distribution room within a preset time period based on the actual load rate corresponding to each moment;

[0152] The acquisition module 1301 is further configured to acquire the outdoor air temperature value through a temperature sensor;

[0153] The processing module 1302 is further configured to determine the number of air changes within a preset time period based on the total residual heat and the outdoor air temperature.

[0154] The processing module 1302 is further configured to control the fan to ventilate the transformer and distribution room according to the ventilation frequency.

[0155] Optionally, the processing module 1302 is specifically configured to control the fan to ventilate the substation room if the real-time air change rate is less than or equal to the rated air change rate, where the rated air change rate is calculated based on the rated waste heat of the substation room and the maximum outdoor air temperature;

[0156] The processing module 1302 is specifically configured to control the fan to ventilate the transformer substation room and output an overload operation alarm if the real-time ventilation frequency is greater than the rated ventilation frequency.

[0157] Optionally, the acquisition module 1301 is specifically configured to continuously acquire the real-time operating current corresponding to the transformer in the power distribution room at each moment within a preset time period;

[0158] The processing module 1302 is specifically configured to determine an actual load rate corresponding to the real-time operating current according to the real-time operating current at each moment.

[0159] Optionally, the processing module 1302 is specifically configured to determine the actual heat generation at each moment according to the actual load rate corresponding to each moment;

[0160] The processing module 1302 is specifically configured to integrate the actual heat values ​​corresponding to multiple moments within a preset time period to obtain the total waste heat value of the power distribution room within the preset time period.

[0161] Optionally, the processing module 1302 is specifically configured to determine the actual heating value of the transformer according to the actual load rate and the rated heating value of the transformer;

[0162] The processing module 1302 is specifically configured to determine the actual heating value of the power distribution cabinet according to the actual load rate, the rated heating value of the power distribution cabinet, and the number of power distribution cabinets;

[0163] The processing module 1302 is specifically configured to determine the actual heating value at each moment according to the actual heating value of the transformer and the actual heating value of the power distribution cabinet.

[0164] Optionally, the processing module 1302 is specifically configured to determine the real-time ventilation frequency according to the total waste heat, the outdoor air temperature, the air heat capacity ratio, the air density, the exhaust air temperature, the room area, and the room height.

[0165] Optionally, the processing module 1302 is specifically configured to determine the real-time ventilation rate according to the first formula;

[0166] The first formula is:

[0167] Among them, n is the real-time ventilation times, Q is the total waste heat, C p is the air heat capacity ratio, ρ is the air density, t n is the exhaust air temperature, t w is the outdoor air temperature, S is the room area, and h is the room height.

[0168] Optionally, the processing module 1302 is specifically configured to open the exhaust fan electric valve and start the exhaust fan to ventilate the power distribution room;

[0169] The processing module 1302 is specifically used to open the electric valve of the blower and start the blower to ventilate the transformer and distribution room.

[0170] Optionally, the processing module 1302 is further configured to control the fan to stop ventilating the transformer substation when it is detected that the ventilation frequency reaches the real-time ventilation frequency.

[0171] Optionally, the processing module 1302 is specifically configured to stop the exhaust fan and close the electric valve of the exhaust fan to stop ventilation of the power distribution room;

[0172] The processing module 1302 is specifically used to stop the blower and close the electric valve of the blower to stop ventilating the transformer and distribution room.

[0173] In the embodiment of the present invention, each module can implement the ventilation control method for the substation provided by the above method embodiment and can achieve the same technical effect. To avoid repetition, it will not be described here.

[0174] like Figure 14 As shown, an embodiment of the present invention further provides a ventilation control device for a power distribution room, and the ventilation control device for the power distribution room may include:

[0175] A memory 1401 storing executable program code;

[0176] a processor 1402 coupled to the memory 1401;

[0177] The processor 1402 calls the executable program code stored in the memory 1401 to execute the ventilation control method for the power substation room executed by the ventilation control device for the power substation room in the above-mentioned method embodiments.

[0178] An embodiment of the present invention provides a computer-readable storage medium storing a computer program, wherein the computer program enables a computer to execute part or all of the steps of the method in the above method embodiments.

[0179] An embodiment of the present invention further provides a computer program product, wherein when the computer program product is run on a computer, the computer is caused to execute part or all of the steps of the method in the above method embodiments.

[0180] An embodiment of the present invention further provides an application publishing platform, wherein the application publishing platform is used to publish a computer program product, wherein when the computer program product runs on a computer, the computer executes part or all of the steps of the method in the above method embodiments.

[0181] It should be understood that references to "one embodiment" or "an embodiment" throughout this specification mean that specific features, structures, or characteristics associated with the embodiment are included in at least one embodiment of the present invention. Therefore, the phrases "in one embodiment" or "in an embodiment" appearing throughout this specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. Those skilled in the art should also be aware that the embodiments described in this specification are all optional embodiments, and the actions and modules involved are not necessarily required for the present invention.

[0182] In various embodiments of the present invention, it should be understood that the size of the serial numbers of the above-mentioned processes does not necessarily mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0183] The units described above as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one place or distributed across multiple network units. Some or all of these units may be selected based on actual needs to achieve the objectives of this embodiment.

[0184] In addition, the functional units in the embodiments of the present invention may be integrated into a single processing unit, each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0185] If the above-mentioned integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-accessible memory. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a memory and includes several requests for causing a computer device (which can be a personal computer, server, or network device, specifically a processor in the computer device) to execute some or all of the steps of the above-mentioned methods of various embodiments of the present invention.

[0186] Those skilled in the art will appreciate that all or part of the steps in the various methods of the above embodiments can be completed by instructing related hardware through a program. The program can be stored in a computer-readable storage medium, and the storage medium includes a read-only memory (ROM), a random access memory (RAM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), a one-time programmable read-only memory (OTPROM), an electronically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, magnetic disk storage, magnetic tape storage, or any other computer-readable medium capable of carrying or storing data.

Claims

1. A ventilation control method for a transformer substation, characterized in that: A ventilation control device is applied to a transformer and distribution room, wherein a fan is provided in the transformer and distribution room, and the ventilation control device is used to control the fan; the method includes: Continuously obtain the actual load rate corresponding to the power distribution room at multiple times within a preset time period; Determining the total waste heat of the power distribution room within the preset time period based on the actual load rate corresponding to each moment; Obtain the outdoor air temperature value through the temperature sensor; Determining the real-time ventilation frequency within the preset time period according to the total waste heat and the outdoor air temperature; According to the real-time ventilation frequency, controlling the fan to ventilate the power distribution room; The determining of the real-time ventilation frequency according to the total waste heat and the outdoor air temperature includes: Determining the real-time air exchange rate based on the total waste heat, the outdoor air temperature, the air heat capacity ratio, the air density, the exhaust air temperature, the room area, and the room height; The determining of the real-time ventilation frequency according to the total waste heat, the outdoor air temperature, the air heat capacity ratio, the air density, the exhaust air temperature, the room area, and the room height includes: Determine the real-time ventilation rate according to the first formula; The first formula is: ; in, is the real-time ventilation number, is the total waste heat, is the air heat capacity ratio, is the air density, is the exhaust air temperature, is the outdoor air temperature value, is the room area, is the room height.

2. The method according to claim 1, characterized in that The controlling the fan to ventilate the transformer and distribution room according to the real-time ventilation frequency includes: If the real-time ventilation frequency is less than or equal to the rated ventilation frequency, controlling the fan to ventilate the power distribution room, wherein the rated ventilation frequency is calculated based on the rated waste heat of the power distribution room and the maximum outdoor air temperature; If the real-time ventilation frequency is greater than the rated ventilation frequency, the fan is controlled to ventilate the substation room and an overload operation alarm is output.

3. The method according to claim 1, characterized in that The continuously obtaining the actual load rate corresponding to the power distribution room at multiple times within the preset time period includes: within the preset time period, continuously obtaining the real-time operating current of the transformer in the power distribution room corresponding to each moment; According to the real-time operating current at each moment, an actual load rate corresponding to the real-time operating current is determined.

4. The method according to any one of claims 1 to 3, characterized in that Determining the total waste heat of the power distribution room within the preset time period according to the actual load rate corresponding to each moment includes: Determining the actual heat generation at each moment according to the actual load rate corresponding to each moment; The actual heat generation corresponding to the multiple moments within the preset time period is integrated to obtain the total waste heat of the power distribution room within the preset time period.

5. The method according to claim 4, characterized in that Determining the actual heat generation at each moment according to the actual load rate corresponding to each moment includes: determining the actual heating value of the transformer according to the actual load rate and the rated heating value of the transformer; Determine the actual heating value of the power distribution cabinet according to the actual load rate, the rated heating value of the power distribution cabinet and the number of power distribution cabinets; The actual heating value at each moment is determined according to the actual heating value of the transformer and the actual heating value of the power distribution cabinet.

6. The method according to any one of claims 1 to 3, characterized in that The fan includes an exhaust fan and a supply fan. The control fan is used to ventilate the power distribution room, including: Open the exhaust fan electric valve and start the exhaust fan to ventilate the power distribution room; Open the electric valve of the blower and start the blower to ventilate the power distribution room.

7. The method according to any one of claims 1 to 3, characterized in that After controlling the fan to ventilate the transformer and distribution room according to the real-time ventilation frequency, the method further includes: When it is detected that the ventilation frequency reaches the real-time ventilation frequency, the fan is controlled to stop ventilating the power distribution room.

8. The method according to claim 7, characterized in that The fan includes an exhaust fan and a supply fan, and the controlling the fan to stop ventilating the transformer and distribution room includes: Stop the exhaust fan and close the exhaust fan electric valve to stop ventilating the power distribution room; Stop the blower and close the blower electric valve to stop ventilating the transformer substation.

9. A ventilation control device for a transformer room, characterized in that: The transformer and distribution room is provided with a fan, and the ventilation control device is used to control the fan; comprising: An acquisition module, configured to continuously acquire the actual load rate corresponding to the power distribution room at multiple times within a preset time period; A processing module, configured to determine the total waste heat of the power transformer and distribution room within the preset time period according to the actual load rate corresponding to each moment; The acquisition module is further configured to acquire the outdoor air temperature value via a temperature sensor; The processing module is further configured to determine the real-time ventilation times within the preset time period based on the total waste heat and the outdoor air temperature; The processing module is further configured to control the fan to ventilate the power distribution room according to the real-time ventilation frequency; The processing module is further configured to determine the real-time ventilation frequency based on the total waste heat, the outdoor air temperature, the air heat capacity ratio, the air density, the exhaust air temperature, the room area, and the room height; The processing module is further configured to determine the real-time ventilation rate according to a first formula; The first formula is: ; in, is the real-time ventilation number, is the total waste heat, is the air heat capacity ratio, is the air density, is the exhaust air temperature, is the outdoor air temperature value, is the room area, is the room height.

10. A ventilation control device for a transformer room, characterized in that: include: a memory storing executable program code; and a processor coupled to the memory; The processor calls the executable program code stored in the memory to execute the ventilation control method for a transformer and distribution room according to any one of claims 1 to 8.

11. A computer-readable storage medium, characterized in that include: The computer-readable storage medium stores computer instructions, and when the computer instructions are executed by a processor, the ventilation control method for a transformer and distribution room according to any one of claims 1 to 8 is implemented.

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