Heat dissipation system control method, wind turbine generator unit and computer readable storage medium

Abstract

This invention relates to the field of wind power technology, and more particularly to a heat dissipation system control method, a wind turbine generator set, and a computer-readable storage medium. The method includes: determining the required heat dissipation of the heat dissipation system, and determining the system heat dissipation of the heat dissipation system based on the heat dissipation air temperature, heat dissipation air velocity, and coolant inlet temperature; detecting whether the system heat dissipation meets the required heat dissipation; if the system heat dissipation does not meet the required heat dissipation, adjusting the airflow and air pressure characteristics of the cooling fan in the heat dissipation system, and then returning to the step of detecting whether the system heat dissipation meets the required heat dissipation, until the system heat dissipation meets the required heat dissipation. This invention improves the control accuracy of axial flow fans, thereby enhancing the heat dissipation effect of the wind turbine heat dissipation system.

Description

Technical Field

[0001] This invention relates to the field of wind power technology, and in particular to a heat dissipation system control method, a wind turbine generator set, and a computer-readable storage medium. Background Technology

[0002] Wind turbine generators are electrical devices that convert wind kinetic energy into electrical energy. As the generating capacity of wind turbine generators increases, the heat generated by the heat-generating components also increases, affecting the equipment's safety and lifespan. Therefore, heat dissipation is necessary. In recent years, with the increase in the power rating of wind turbine generators, the heat dissipation requirements have also increased, leading to the increasingly widespread application of water-cooling systems due to their superior cooling performance.

[0003] Currently, wind turbine generators primarily employ active water cooling for heat dissipation. Active water cooling, in addition to all the components of a water-cooled radiator, also incorporates axial fans for auxiliary cooling, thus offering superior heat dissipation compared to a simple water-cooled radiator. The control of active water cooling radiators is mainly based on the coolant temperature. Specifically, when the coolant inlet temperature is lower than the programmed setting, the axial fan auxiliary cooling is stopped or maintained; conversely, when the coolant inlet temperature is higher than the programmed setting, the axial fan auxiliary cooling is activated or maintained. However, this method of controlling the axial fan operation based on coolant temperature cannot accurately meet the heat dissipation requirements of wind turbine generators, thus affecting the radiator's cooling performance. Summary of the Invention

[0004] The main objective of this invention is to provide a heat dissipation system control method, a wind turbine generator set, and a computer-readable storage medium, which aims to improve the control accuracy of axial flow fans, thereby enhancing the heat dissipation effect of water cooling.

[0005] To achieve the above objectives, the present invention provides a heat dissipation system control method, the heat dissipation system control method comprising the following steps:

[0006] Determine the required heat dissipation of the heat dissipation system, and determine the system heat dissipation based on the heat dissipation air temperature, heat dissipation air velocity and coolant inlet temperature of the heat dissipation system;

[0007] Check whether the system's heat dissipation meets the required heat dissipation.

[0008] If the system's heat dissipation does not meet the required heat dissipation, then after adjusting the airflow and air pressure characteristics of the cooling fan in the heat dissipation system, the process returns to the step of detecting whether the system's heat dissipation meets the required heat dissipation, until the system's heat dissipation meets the required heat dissipation.

[0009] Optionally, the cooling air velocity includes at least: the air velocity in the forced air cooling zone of the cooling system and the air velocity in the natural air cooling zone of the cooling system;

[0010] The coolant-side inlet temperature includes at least the coolant-side inlet temperature of the forced air-cooled zone and the coolant-side inlet temperature of the natural air-cooled zone;

[0011] The step of determining the system heat dissipation of the heat dissipation system based on the heat dissipation air temperature, heat dissipation air velocity, and coolant inlet temperature includes:

[0012] The forced cooling temperature difference is obtained by subtracting the cooling air temperature of the heat dissipation system from the coolant inlet temperature of the forced air cooling zone.

[0013] The forced heat transfer factor of the forced air-cooling zone is determined based on the wind speed in the forced air-cooling zone, and the forced heat transfer efficiency of the forced air-cooling zone is determined based on the forced heat transfer factor.

[0014] Calculate the product of the forced heat exchange efficiency, the forced heat dissipation temperature difference, and the heat capacity to obtain the forced heat dissipation of the forced air-cooled zone;

[0015] Calculate the coolant inlet temperature of the natural air cooling zone and subtract the heat dissipation air temperature to obtain the natural heat dissipation temperature difference;

[0016] The natural heat transfer factor of the natural air-cooled zone is determined based on the wind speed in the natural air-cooled zone, and the natural heat transfer efficiency of the natural air-cooled zone is determined based on the natural heat transfer factor.

[0017] Calculate the product of the natural heat exchange efficiency, the natural heat dissipation temperature difference, and the heat capacity to obtain the natural heat dissipation of the natural air-cooled zone;

[0018] Calculate the sum of the forced heat dissipation and the natural heat dissipation to obtain the system heat dissipation of the heat dissipation system.

[0019] Optionally, the step of determining the forced heat transfer efficiency of the forced air-cooled zone based on the forced heat transfer factor includes:

[0020] The forced heat transfer factor is corrected by a preset first correction factor to obtain the corrected forced heat transfer factor.

[0021] The heat exchange efficiency of the forced air-cooled zone is calculated using the corrected forced heat transfer factor.

[0022] The step of determining the natural heat transfer efficiency of the naturally air-cooled zone based on the natural heat transfer factor includes:

[0023] The natural heat transfer factor is corrected by a preset second correction coefficient to obtain the corrected natural heat transfer factor.

[0024] The heat exchange efficiency of the natural air-cooled zone is calculated using the corrected natural heat transfer factor.

[0025] Optionally, before the step of determining the forced heat transfer factor of the forced air-cooled zone based on the wind speed in the forced air-cooled zone, the method further includes:

[0026] Based on the airflow and air pressure curves of the axial fan and the resistance curve of the radiator in the forced air cooling zone, the required airflow of the forced air cooling zone is calculated.

[0027] Based on the required air volume and the ventilation area of ​​the forced air cooling zone, the base wind speed of the forced air cooling zone is calculated.

[0028] The base wind speed is corrected by a preset wind speed correction coefficient and the incoming wind speed, and the corrected base wind speed is used as the wind speed of the forced air cooling zone.

[0029] Optionally, the heat dissipation system is in use;

[0030] The steps for determining the required heat dissipation of the cooling system include:

[0031] The required heat dissipation of the cooling system is determined based on the incoming wind speed of the natural wind in the environment where the cooling fan is located.

[0032] Before the step of determining the system heat dissipation of the heat dissipation system based on the heat dissipation air temperature, heat dissipation air velocity, and coolant inlet temperature, the method further includes:

[0033] The actual air temperature of the heat dissipation system is taken as the heat dissipation air temperature of the heat dissipation system.

[0034] The actual wind speed in the forced air cooling zone is taken as the wind speed in the forced air cooling zone, and the incoming air speed is taken as the wind speed in the natural air cooling zone.

[0035] The actual inlet temperature of the coolant side in the forced air-cooled zone is taken as the coolant inlet temperature of the forced air-cooled zone, and the actual inlet temperature of the coolant side in the natural air-cooled zone is taken as the coolant inlet temperature of the natural air-cooled zone.

[0036] Optionally, the step of adjusting the airflow and air pressure characteristics of the cooling fan in the cooling system includes:

[0037] Adjust the fan frequency of the cooling fan in the cooling system to adjust the airflow and air pressure characteristics of the cooling fan.

[0038] Optionally, the heat dissipation system is in the design state;

[0039] The steps for determining the required heat dissipation of the cooling system include:

[0040] The designed heat dissipation capacity of the heat dissipation system is taken as the required heat dissipation capacity of the heat dissipation system.

[0041] Before the step of determining the system heat dissipation of the heat dissipation system based on the heat dissipation air temperature, heat dissipation air velocity, and coolant inlet temperature, the method further includes:

[0042] Obtain the preset wind speed and designed ventilation area of ​​the forced air cooling zone in the heat dissipation system, and calculate the estimated air volume of the forced air cooling zone.

[0043] The estimated wind speed of the forced air cooling zone is calculated based on the estimated air volume, and the estimated wind speed is used as the wind speed of the forced air cooling zone.

[0044] The design air temperature of the heat dissipation system is used as the heat dissipation air temperature, the design air velocity of the natural air cooling zone is used as the air velocity of the natural air cooling zone, the design inlet temperature of the coolant side of the forced air cooling zone is used as the coolant side inlet temperature of the forced air cooling zone, and the design inlet temperature of the coolant side of the natural air cooling zone is used as the coolant side inlet temperature of the natural air cooling zone.

[0045] Optionally, the step of adjusting the airflow and air pressure characteristics of the cooling fan in the cooling system includes:

[0046] The preset wind speed is adjusted to adjust the airflow and air pressure characteristics of the cooling fan.

[0047] Optionally, after the step of detecting whether the system's heat dissipation meets the required heat dissipation, the method further includes:

[0048] If the heat dissipation of the system meets the required heat dissipation, then the estimated wind pressure of the forced air cooling zone is calculated based on the environmental parameters of the environment in which the heat dissipation system is to be used and the preset wind speed.

[0049] The estimated power is calculated based on the estimated air volume and the estimated air pressure.

[0050] Based on the estimated air volume, the estimated air pressure, and the estimated power, a target axial flow fan is determined from the preset axial flow fans;

[0051] If the expected heat dissipation generated by the target axial flow fan meets the required heat dissipation, then the target axial flow fan will be used as the heat dissipation fan of the heat dissipation system.

[0052] To achieve the above objectives, the present invention also proposes a wind turbine generator set, which includes a heat dissipation system, wherein the heat dissipation system performs the steps of the heat dissipation system control method described above when dissipating heat.

[0053] Furthermore, to achieve the above objectives, the present invention also proposes a computer-readable storage medium storing a heat dissipation system control program, which, when executed by a processor, implements the steps of the heat dissipation system control method as described above.

[0054] In this invention, the required heat dissipation of the heat dissipation system is determined, and the system heat dissipation is determined based on the heat dissipation air temperature, heat dissipation air velocity, and coolant inlet temperature of the heat dissipation system; it is then checked whether the system heat dissipation meets the required heat dissipation; if the system heat dissipation does not meet the required heat dissipation, the airflow and air pressure characteristics of the heat dissipation fan in the heat dissipation system are adjusted, and the process returns to the step of checking whether the system heat dissipation meets the required heat dissipation, until the system heat dissipation meets the required heat dissipation.

[0055] In this invention, the airflow and air pressure characteristics of the axial flow fan are adjusted to regulate the heat dissipation of the air-cooled auxiliary heat dissipation, thereby adjusting the system heat dissipation of the heat dissipation system. This allows the system heat dissipation of the heat dissipation system to meet the actual heat dissipation requirements (i.e., the required heat dissipation) of the wind turbine. Compared to controlling the start and stop status of the axial flow fan, this invention can achieve more precise and accurate control of the working status of the axial flow fan in the heat dissipation system, ensuring that the system heat dissipation of the heat dissipation system meets the required heat dissipation of the wind turbine, thereby improving the heat dissipation effect of the heat dissipation system. Attached Figure Description

[0056] Figure 1 This is a schematic diagram of the hardware operating environment involved in the embodiments of the present invention;

[0057] Figure 2 This is a flowchart illustrating the first embodiment of the heat dissipation system control method of the present invention;

[0058] Figure 3 This is a schematic diagram of the system heat dissipation calculation process according to one embodiment of the present invention;

[0059] Figure 4 This is a schematic diagram of the heat dissipation system control flow according to one embodiment of the present invention;

[0060] Figure 5 This is a schematic diagram of the fan selection process according to one embodiment of the present invention;

[0061] Figure 6 This is a schematic diagram of the functional modules of a preferred embodiment of the heat dissipation system control device of the present invention.

[0062] The objectives, features, and advantages of this invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0063] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0064] like Figure 1 As shown, Figure 1 This is a schematic diagram of the device structure of the hardware operating environment involved in the embodiments of the present invention.

[0065] It should be noted that the heat dissipation system control device in the embodiments of the present invention can be a control device for the heat dissipation system or a terminal device that establishes a communication connection with the control device, such as a smartphone, personal computer, or server, etc., without specific limitations.

[0066] like Figure 1 As shown, the heat dissipation system control device may include: a processor 1001, such as a CPU; a network interface 1004; a user interface 1003; a memory 1005; and a communication bus 1002. The communication bus 1002 is used to enable communication between these components. The user interface 1003 may include a display screen and an input unit such as a keyboard; optionally, the user interface 1003 may also include a standard wired interface or a wireless interface. The network interface 1004 may optionally include a standard wired interface or a wireless interface (such as a Wi-Fi interface). The memory 1005 may be high-speed RAM or non-volatile memory, such as a disk drive. Optionally, the memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0067] Those skilled in the art will understand that Figure 1 The device structure shown does not constitute a limitation on the heat dissipation system control device, and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0068] like Figure 1 As shown, the memory 1005, as a computer storage medium, may include an operating system, a network communication module, a user interface module, and a heat dissipation system control program. The operating system is a program that manages and controls the hardware and software resources of the device, supporting the operation of the heat dissipation system control program and other software or programs. Figure 1 In the device shown, the user interface 1003 is mainly used for data communication with the client; the network interface 1004 is mainly used for establishing a communication connection with the server; and the processor 1001 can be used to call the heat dissipation system control program stored in the memory 1005 and perform the following operations:

[0069] Determine the required heat dissipation of the heat dissipation system, and determine the system heat dissipation based on the heat dissipation air temperature, heat dissipation air velocity and coolant inlet temperature of the heat dissipation system;

[0070] Check whether the system's heat dissipation meets the required heat dissipation.

[0071] If the system's heat dissipation does not meet the required heat dissipation, then after adjusting the airflow and air pressure characteristics of the cooling fan in the heat dissipation system, the process returns to the step of detecting whether the system's heat dissipation meets the required heat dissipation, until the system's heat dissipation meets the required heat dissipation.

[0072] Furthermore, the cooling air velocity includes at least: the air velocity in the forced air cooling zone of the cooling system and the air velocity in the natural air cooling zone of the cooling system;

[0073] The coolant-side inlet temperature includes at least the coolant-side inlet temperature of the forced air-cooled zone and the coolant-side inlet temperature of the natural air-cooled zone;

[0074] The step of determining the system heat dissipation of the heat dissipation system based on the heat dissipation air temperature, heat dissipation air velocity, and coolant inlet temperature includes:

[0075] The forced cooling temperature difference is obtained by subtracting the cooling air temperature of the heat dissipation system from the coolant inlet temperature of the forced air cooling zone.

[0076] The forced heat transfer factor of the forced air-cooling zone is determined based on the wind speed in the forced air-cooling zone, and the forced heat transfer efficiency of the forced air-cooling zone is determined based on the forced heat transfer factor.

[0077] Calculate the product of the forced heat exchange efficiency, the forced heat dissipation temperature difference, and the heat capacity to obtain the forced heat dissipation of the forced air-cooled zone;

[0078] Calculate the coolant inlet temperature of the natural air cooling zone and subtract the heat dissipation air temperature to obtain the natural heat dissipation temperature difference;

[0079] The natural heat transfer factor of the natural air-cooled zone is determined based on the wind speed in the natural air-cooled zone, and the natural heat transfer efficiency of the natural air-cooled zone is determined based on the natural heat transfer factor.

[0080] Calculate the product of the natural heat exchange efficiency, the natural heat dissipation temperature difference, and the heat capacity to obtain the natural heat dissipation of the natural air-cooled zone;

[0081] Calculate the sum of the forced heat dissipation and the natural heat dissipation to obtain the system heat dissipation of the heat dissipation system.

[0082] Further, the step of determining the forced heat transfer efficiency of the forced air-cooled zone based on the forced heat transfer factor includes:

[0083] The forced heat transfer factor is corrected by a preset first correction factor to obtain the corrected forced heat transfer factor.

[0084] The heat exchange efficiency of the forced air-cooled zone is calculated using the corrected forced heat transfer factor.

[0085] The step of determining the natural heat transfer efficiency of the naturally air-cooled zone based on the natural heat transfer factor includes:

[0086] The natural heat transfer factor is corrected by a preset second correction coefficient to obtain the corrected natural heat transfer factor.

[0087] The heat exchange efficiency of the natural air-cooled zone is calculated using the corrected natural heat transfer factor.

[0088] Furthermore, before the step of determining the forced heat transfer factor of the forced air-cooling zone based on the wind speed of the forced air-cooling zone, the processor 1001 can also be used to call the heat dissipation system control program stored in the memory 1005 and perform the following operations:

[0089] Based on the airflow and air pressure curves of the axial fan and the resistance curve of the radiator in the forced air cooling zone, the required airflow of the forced air cooling zone is calculated.

[0090] Based on the required air volume and the ventilation area of ​​the forced air cooling zone, the base wind speed of the forced air cooling zone is calculated.

[0091] The base wind speed is corrected by a preset wind speed correction coefficient and the incoming wind speed, and the corrected base wind speed is used as the wind speed of the forced air cooling zone.

[0092] Furthermore, the heat dissipation system is in operation;

[0093] The steps for determining the required heat dissipation of the cooling system include:

[0094] The required heat dissipation of the cooling system is determined based on the incoming wind speed of the natural wind in the environment where the cooling fan is located.

[0095] Before the step of determining the system heat dissipation of the heat dissipation system based on the heat dissipation air temperature, heat dissipation air velocity, and coolant inlet temperature, the processor 1001 can also call the heat dissipation system control program stored in the memory 1005 and perform the following operations:

[0096] The actual air temperature of the heat dissipation system is taken as the heat dissipation air temperature of the heat dissipation system.

[0097] The actual wind speed in the forced air cooling zone is taken as the wind speed in the forced air cooling zone, and the incoming air speed is taken as the wind speed in the natural air cooling zone.

[0098] The actual inlet temperature of the coolant side in the forced air-cooled zone is taken as the coolant inlet temperature of the forced air-cooled zone, and the actual inlet temperature of the coolant side in the natural air-cooled zone is taken as the coolant inlet temperature of the natural air-cooled zone.

[0099] Furthermore, the step of adjusting the airflow and air pressure characteristics of the cooling fan in the heat dissipation system includes:

[0100] Adjust the fan frequency of the cooling fan in the cooling system to adjust the airflow and air pressure characteristics of the cooling fan.

[0101] Furthermore, the heat dissipation system is in the design state;

[0102] The steps for determining the required heat dissipation of the cooling system include:

[0103] The designed heat dissipation capacity of the heat dissipation system is taken as the required heat dissipation capacity of the heat dissipation system.

[0104] Before the step of determining the system heat dissipation of the heat dissipation system based on the heat dissipation air temperature, heat dissipation air velocity, and coolant inlet temperature, the processor 1001 can also call the heat dissipation system control program stored in the memory 1005 and perform the following operations:

[0105] Obtain the preset wind speed and designed ventilation area of ​​the forced air cooling zone in the heat dissipation system, and calculate the estimated air volume of the forced air cooling zone.

[0106] The estimated wind speed of the forced air cooling zone is calculated based on the estimated air volume, and the estimated wind speed is used as the wind speed of the forced air cooling zone.

[0107] The design air temperature of the heat dissipation system is used as the heat dissipation air temperature, the design air velocity of the natural air cooling zone is used as the air velocity of the natural air cooling zone, the design inlet temperature of the coolant side of the forced air cooling zone is used as the coolant side inlet temperature of the forced air cooling zone, and the design inlet temperature of the coolant side of the natural air cooling zone is used as the coolant side inlet temperature of the natural air cooling zone.

[0108] Furthermore, the step of adjusting the airflow and air pressure characteristics of the cooling fan in the heat dissipation system includes:

[0109] The preset wind speed is adjusted to adjust the airflow and air pressure characteristics of the cooling fan.

[0110] Furthermore, after the step of detecting whether the system's heat dissipation meets the required heat dissipation, the processor 1001 can also call the heat dissipation system control program stored in the memory 1005 and perform the following operations:

[0111] If the heat dissipation of the system meets the required heat dissipation, then the estimated wind pressure of the forced air cooling zone is calculated based on the environmental parameters of the environment in which the heat dissipation system is to be used and the preset wind speed.

[0112] The estimated power is calculated based on the estimated air volume and the estimated air pressure.

[0113] Based on the estimated air volume, the estimated air pressure, and the estimated power, a target axial flow fan is determined from the preset axial flow fans;

[0114] If the expected heat dissipation generated by the target axial flow fan meets the required heat dissipation, then the target axial flow fan will be used as the heat dissipation fan of the heat dissipation system.

[0115] Based on the above structure, various embodiments of the heat dissipation system control method are proposed.

[0116] Reference Figure 2 , Figure 2 This is a flowchart illustrating a first embodiment of the heat dissipation system control method of the present invention. The present invention provides an embodiment of the heat dissipation system control method. It should be noted that although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order. In this embodiment, the executing entity of the heat dissipation system control method can be a control device of the heat dissipation system, or a terminal device that establishes a communication connection with the control device, such as a smartphone, personal computer, or server. No limitation is made in this embodiment. For ease of description, the executing entity is omitted from the description of each embodiment. In this embodiment, the heat dissipation system control method includes:

[0117] Step S10: Determine the required heat dissipation of the heat dissipation system, and determine the system heat dissipation of the heat dissipation system based on the heat dissipation air temperature, heat dissipation air velocity and coolant inlet temperature.

[0118] In this embodiment, when the wind turbine enters the adjustment cycle or the wind turbine triggers an adjustment command, the required heat dissipation of the wind turbine's heat dissipation system is obtained, and the actual system heat dissipation generated by the wind turbine is calculated. Based on the system heat dissipation and the required heat dissipation, the wind volume and wind pressure characteristics of the wind turbine are adjusted so that the system heat dissipation of the wind turbine meets the required heat dissipation of the wind turbine.

[0119] Specifically, the required heat dissipation of a wind turbine is positively correlated with its operating power. Higher operating power results in greater heat generation and a higher required heat dissipation; conversely, lower operating power results in less heat generation and a lower required heat dissipation. The specific process for determining the required heat dissipation is not limited here. For example, in one feasible implementation, the process may involve: calculating the operating power of the wind turbine based on the incoming wind speed; and multiplying the operating power by a heat loss coefficient and a safety factor to obtain the required heat dissipation of the wind turbine.

[0120] In this embodiment, the system heat dissipation is determined based on the cooling air temperature, cooling air velocity, and coolant inlet temperature. This embodiment does not limit the type of air-cooled auxiliary cooling in the system; it can use a natural air cooling zone, a forced air cooling zone, or a semi-forced air cooling zone combining natural and forced air cooling. The specific configuration can be set according to actual needs and is not limited here. The methods for obtaining the inlet and outlet temperatures are not elaborated here; for example, they can be obtained through temperature sensors.

[0121] Furthermore, when the heat dissipation system uses a semi-forced air-cooling zone as auxiliary heat dissipation, in one feasible embodiment, the inlet temperature and outlet temperature of the coolant can refer to the inlet temperature and outlet temperature of the entire heat dissipation system. In this case, the system heat dissipation can be calculated using an overall calculation method. In another feasible embodiment, the inlet temperature of the coolant can also include the forced air-cooling zone inlet temperature of the coolant in the forced air-cooling zone of the heat dissipation system and the natural air-cooling zone inlet temperature of the coolant in the natural air-cooling zone of the heat dissipation system. The outlet temperature can include the forced air-cooling zone outlet temperature of the coolant in the forced air-cooling zone and the natural air-cooling zone outlet temperature of the coolant in the natural air-cooling zone. In this embodiment, the system heat dissipation can be calculated using a segmented calculation method, that is, the heat dissipation of forced air cooling and the heat dissipation of natural air cooling are calculated separately, and the sum of the heat dissipation of forced air cooling and the heat dissipation of natural air cooling is taken as the system heat dissipation.

[0122] Step S20: Detect whether the heat dissipation of the system meets the required heat dissipation.

[0123] In this embodiment, after obtaining the system heat dissipation and required heat dissipation of the wind turbine cooling system, it is checked whether the system heat dissipation meets the required heat dissipation. The specific detection method is not limited here. For example, in one feasible implementation, a heat dissipation margin range can be determined based on the required heat dissipation. The heat dissipation margin range represents the allowable error range of the heat dissipation. If the system heat dissipation is within the heat dissipation margin range, it is considered that the system heat dissipation meets the required heat dissipation. For example, in another feasible implementation, it can also be determined whether the system heat dissipation meets the required heat dissipation by the degree of deviation between the system heat dissipation and the required heat dissipation. The smaller the deviation, the closer the system heat dissipation is to the required heat dissipation. In this case, the system heat dissipation is considered to meet the required heat dissipation. In this embodiment, the degree of deviation can be reflected by indicators such as the absolute value and percentage of the difference, which will not be elaborated here.

[0124] Step S30: If the system heat dissipation does not meet the required heat dissipation, then after adjusting the airflow and air pressure characteristics of the cooling fan in the heat dissipation system, return to the step of detecting whether the system heat dissipation meets the required heat dissipation, until the system heat dissipation meets the required heat dissipation.

[0125] If the system's heat dissipation does not meet the required heat dissipation, adjust the airflow and air pressure characteristics of the cooling fans in the cooling system to adjust the heat dissipation of the air-cooled auxiliary heat dissipation, thereby adjusting the system's heat dissipation.

[0126] In this embodiment, there is no limitation on the specific method for adjusting the air volume and air pressure characteristics. It can be set according to the application scenario and the actual needs of the user. For example, in one feasible implementation, when the wind turbine has been put into use, the air volume and air pressure characteristics can be adjusted by adjusting the wind turbine's fan frequency; in another, when the wind turbine is in the design stage, the air volume and air pressure characteristics can be adjusted by adjusting the wind speed. There is no limitation here.

[0127] Specifically, after the system's heat dissipation meets the required heat dissipation, the wind turbine can be operated according to the airflow and air pressure characteristics under that condition. In one feasible embodiment, the required heat dissipation and system heat dissipation can be determined again after a preset time, and it can be checked whether the system heat dissipation meets the required heat dissipation. That is, the step of determining the required heat dissipation of the wind turbine based on the incoming wind speed of natural wind is returned. This embodiment, by setting a preset time, ensures that the system heat dissipation can continuously meet the required heat dissipation, thus extending the service life of the wind turbine. In another feasible embodiment, the required heat dissipation and system heat dissipation can be determined again after the temperature of the coolant or the temperature of the wind turbine reaches a certain threshold, and it can be checked whether the system heat dissipation meets the required heat dissipation.

[0128] In this embodiment, the required heat dissipation of the heat dissipation system is determined, and the system heat dissipation of the heat dissipation system is determined based on the heat dissipation air temperature, heat dissipation air velocity and coolant inlet temperature. The system heat dissipation is then checked to see if it meets the required heat dissipation. If the system heat dissipation does not meet the required heat dissipation, the airflow and air pressure characteristics of the heat dissipation fan in the heat dissipation system are adjusted, and the process returns to the step of checking whether the system heat dissipation meets the required heat dissipation, until the system heat dissipation meets the required heat dissipation.

[0129] In this embodiment, the airflow and air pressure characteristics of the axial fan are adjusted to adjust the heat dissipation of the air-cooled auxiliary heat dissipation, thereby adjusting the system heat dissipation of the heat dissipation system. This ensures that the system heat dissipation of the heat dissipation system can meet the actual heat dissipation requirements (i.e., the required heat dissipation) of the wind turbine. Compared to controlling the start and stop state of the axial fan, this embodiment can achieve more precise and accurate control of the working state of the axial fan in the heat dissipation system, so that the system heat dissipation of the heat dissipation system meets the required heat dissipation of the wind turbine, thereby improving the heat dissipation effect of the heat dissipation system.

[0130] Furthermore, in this embodiment, the axial flow fan is controlled based on the heat dissipation of the heat dissipation system. Compared with the axial flow fan controlled based on the temperature of the coolant, the control of the heat dissipation system in this embodiment can better meet the actual working conditions of the fan, improve the accuracy of the control of the heat dissipation system, and thus improve the heat dissipation effect of the heat dissipation system.

[0131] Further, based on the first embodiment described above, a second embodiment of the heat dissipation system control method of the present invention is proposed. In this embodiment, the heat dissipation wind speed includes at least: the wind speed in the forced air cooling zone and the wind speed in the natural air cooling zone of the heat dissipation system; the coolant-side inlet temperature includes at least: the coolant-side inlet temperature in the forced air cooling zone and the coolant-side inlet temperature in the natural air cooling zone; in step S10: determining the system heat dissipation of the heat dissipation system based on the heat dissipation wind temperature, heat dissipation wind speed, and coolant-side inlet temperature includes:

[0132] Step S101: Calculate the inlet temperature of the coolant side of the forced air cooling zone and subtract the heat dissipation air temperature of the heat dissipation system to obtain the forced heat dissipation temperature difference;

[0133] In this embodiment, the heat dissipation system uses a semi-forced air cooling zone for auxiliary heat dissipation. The embodiment is described in detail as follows: the coolant first flows through the forced air cooling zone and then through the natural air cooling zone. The case where the coolant first flows through the natural air cooling zone and then through the forced air cooling zone can be referred to in this embodiment and will not be repeated here.

[0134] In this embodiment, taking the flow direction of the coolant as positive, the outlet temperature of the coolant in the previous air-cooled zone (i.e., the coolant temperature when the coolant leaves the air-cooled zone) can be used as the inlet temperature of the coolant in the next air-cooled zone. In this embodiment, since the forced air-cooled zone and the natural air-cooled zone are connected, the air temperature of both the forced air-cooled zone and the natural air-cooled zone can be regarded as the heat dissipation air temperature, and there are no specific restrictions here.

[0135] In this embodiment, the system heat dissipation is calculated in segments to improve the accuracy of the heat dissipation calculation. Specifically, the forced air cooling zone's coolant inlet temperature is subtracted from the cooling air temperature of the cooling system to obtain the forced cooling temperature difference.

[0136] Step S102: Determine the forced heat transfer factor of the forced air-cooling zone based on the wind speed of the forced air-cooling zone, and determine the forced heat transfer efficiency of the forced air-cooling zone based on the forced heat transfer factor.

[0137] The forced heat transfer factor of the forced air-cooled zone is determined based on the wind speed in the forced air-cooled zone, and the forced heat transfer efficiency of the forced air-cooled zone is determined based on the forced heat transfer factor.

[0138] Step S103: Calculate the product of the forced heat exchange efficiency, the forced heat dissipation temperature difference, and the heat capacity to obtain the forced heat dissipation of the forced air-cooled zone;

[0139] The forced heat transfer efficiency, the forced heat dissipation temperature difference, and the heat capacity are multiplied to obtain the forced heat dissipation of the forced air-cooled zone. Specifically, in this embodiment, the formula for calculating the forced heat dissipation is:

[0140] Φ1=W1(t1-t′1)=ηW min (t1-t2)

[0141] Where t1 is the inlet temperature of the forced air cooling zone, t1' is the outlet temperature of the forced air cooling zone, W1 is the heat capacity of the coolant, and W min η represents the minimum heat capacity, and η represents the heat exchange efficiency of the forced air-cooled zone.

[0142] Step S104: Calculate the inlet temperature of the coolant side of the natural air cooling zone and subtract the heat dissipation air temperature to obtain the natural heat dissipation temperature difference;

[0143] In this embodiment, the natural air-cooled zone's coolant inlet temperature is calculated by subtracting the cooling air temperature to obtain the natural heat dissipation temperature difference. In one feasible embodiment, the coolant inlet temperature of the naturally air-cooled zone can be the coolant outlet temperature of the forced air-cooled zone; in another feasible embodiment, the coolant inlet temperature of the naturally air-cooled zone can be a temperature calculated based on the coolant outlet temperature and heat loss coefficient of the forced air-cooled zone, and can be set according to actual needs.

[0144] Step S105: Determine the natural heat transfer factor of the natural air-cooled zone based on the wind speed of the natural air-cooled zone, and determine the natural heat transfer efficiency of the natural air-cooled zone based on the natural heat transfer factor.

[0145] The natural heat transfer factor of the naturally air-cooled zone is determined based on the wind speed in the zone, and the natural heat transfer efficiency of the zone is determined based on the natural heat transfer factor.

[0146] Step S106: Calculate the product of the natural heat exchange efficiency, the natural heat dissipation temperature difference, and the heat capacity to obtain the natural heat dissipation of the natural air-cooled zone;

[0147] The natural heat transfer efficiency, the natural heat dissipation temperature difference, and the heat capacity are multiplied to obtain the natural heat dissipation of the naturally air-cooled zone. For example, in one feasible embodiment, the formula for calculating the natural heat dissipation is:

[0148] Φ2=W1(t′1-t"1)=η′W min (t′1-t2)

[0149] Where t1' is the inlet temperature of the natural air-cooled zone, t1” is the outlet temperature of the natural air-cooled zone, W1 is the heat capacity of the coolant, and W min η' represents the minimum heat capacity, and η' represents the heat exchange efficiency of the natural air-cooled zone.

[0150] Step S107: Calculate the sum of the forced heat dissipation and the natural heat dissipation to obtain the system heat dissipation of the heat dissipation system.

[0151] Calculate the sum of forced heat dissipation and natural heat dissipation to obtain the system heat dissipation of the cooling system.

[0152] Further, in one feasible embodiment, step S102: determining the forced heat transfer efficiency of the forced air-cooled zone based on the forced heat transfer factor includes:

[0153] Step S1021: The forced heat transfer factor is corrected by a preset first correction coefficient to obtain the corrected forced heat transfer factor.

[0154] In this embodiment, the system heat dissipation is corrected by adjusting the heat exchange efficiency during the calculation process. The corrected forced heat dissipation obtained in this embodiment has high accuracy, thus making the system heat dissipation more accurate, thereby improving the accuracy of the fan frequency and enhancing the heat dissipation effect of the fan. Specifically, since the calculation process is divided into two segments—a forced air cooling zone and a natural air cooling zone—the heat exchange efficiency is also corrected in two segments.

[0155] Specifically, in this embodiment, the forced heat transfer factor is corrected by a preset first correction coefficient to obtain the corrected forced heat transfer factor.

[0156] Step S1022: Calculate the heat exchange efficiency of the forced air-cooled zone using the corrected forced heat transfer factor.

[0157] The heat transfer efficiency of the forced air-cooled zone is calculated using the corrected forced heat transfer factor. Specifically, the corrected formula for the heat transfer efficiency η of the forced air-cooled zone can be expressed as:

[0158] Where, j x =cRe d .

[0159] In the above expression, j is the forced heat transfer factor of the forced air-cooled zone. x is the correction factor (i.e., the first correction factor) for the forced heat transfer factor j, and c and d are preset correction parameters.

[0160] In this embodiment, step S104, which involves determining the natural heat transfer efficiency of the naturally cooled zone based on the natural heat transfer factor, includes:

[0161] Step S1041: The natural heat transfer factor is corrected by a preset second correction coefficient to obtain the corrected natural heat transfer factor.

[0162] In this embodiment, the natural heat transfer factor is corrected by a preset second correction coefficient to obtain the corrected natural heat transfer factor.

[0163] Step S1042: The heat exchange efficiency of the natural air-cooled zone is calculated using the corrected natural heat transfer factor.

[0164] The heat transfer efficiency of the naturally air-cooled zone was calculated using the corrected natural heat transfer factor.

[0165] In this embodiment, the correction formula for the heat exchange efficiency η' of the natural air-cooled zone can be expressed as:

[0166] Where, j′ x =c′Re′ d′ .

[0167] In the above expression, j' is the forced heat transfer factor of the natural air-cooled zone, j'x is the correction coefficient of the natural heat transfer factor j' (i.e., the second correction coefficient), and c' and d' are preset correction parameters.

[0168] Furthermore, in one feasible embodiment, before step S102, the method further includes:

[0169] Step S108: Based on the airflow and air pressure curves of the axial fan and the resistance curve of the radiator in the forced air cooling zone, the required airflow of the forced air cooling zone is calculated.

[0170] In this embodiment, the air velocity in the forced air cooling zone is corrected before calculating the system heat dissipation to obtain a more accurate air velocity. Specifically, the required air volume for the forced air cooling zone is calculated based on the airflow and air pressure curves of the axial fan and the resistance curve of the radiator in the forced air cooling zone.

[0171] Step S109: Based on the required air volume and the ventilation area of ​​the forced air cooling zone, calculate the basic wind speed of the forced air cooling zone;

[0172] Based on the required air volume and the ventilation area of ​​the forced air cooling zone, the base wind speed of the forced air cooling zone is calculated.

[0173] Specifically, the required airflow can be calculated by combining the equations of the PQ characteristic curve (cooling fan airflow-resistance characteristic curve) and the resistance equation of the air passage in the air-cooled zone. Specifically, the parametric equation of the PQ characteristic curve can be expressed as:

[0174] P = a i Q 2 +b i Q+c i i = 1, 2, 3...n-1, Q ∈ (Q i Q i+1 )

[0175] Where i represents the i-th operating point on the PQ characteristic curve, P is the flow rate, Q is the air pressure, and parameter a i b i c i It can be calculated based on various operating points on the PQ characteristic curve, specifically:

[0176]

[0177] in,

[0178] Specifically, the drag equation for the air passage can be:

[0179]

[0180] Among them, v in V represents the air inlet volume. out Indicates the volume of the air outlet. Let L represent the average specific volume, L represent the total length of air flow in the radiator, and G represent the mass flow rate.

[0181] The simultaneous equations are:

[0182]

[0183] Where ΔP' represents the air volume correction. The required air volume P can be calculated based on the above simultaneous equations.

[0184] Step S110: Correct the base wind speed using a preset wind speed correction coefficient and the incoming wind speed, and use the corrected base wind speed as the wind speed of the forced air cooling zone.

[0185] The base wind speed is corrected by a preset wind speed correction coefficient and the incoming wind speed, and the corrected base wind speed is used as the wind speed of the forced air cooling zone.

[0186] The base wind speed is corrected using a preset wind speed correction coefficient and the incoming wind speed, and the corrected base wind speed is used as the forced wind speed. Specifically, the corrected wind speed equation is:

[0187]

[0188] Wherein, coefficients b and m are forced wind speed correction coefficients, V0 is the incoming wind speed of natural wind, and A is the ventilation area of ​​the forced air cooling zone.

[0189] Furthermore, in one feasible implementation, refer to Figure 3 The specific process for calculating the system's heat dissipation is as follows:

[0190] The forced air cooling zone wind speed is calculated based on the fan PQ curve and the radiator flow resistance characteristic curve, and wind speed calculation correction is performed (that is, based on the air volume and air pressure curve of the axial fan in the forced air cooling zone and the resistance curve of the radiator, the required air volume of the forced air cooling zone is calculated; based on the required air volume and the ventilation area of ​​the forced air cooling zone, the base wind speed of the forced air cooling zone is calculated; the base wind speed is corrected by a preset wind speed correction coefficient and the incoming air speed, and the corrected base wind speed is used as the wind speed of the forced air cooling zone).

[0191] Based on the corrected forced air velocity and other external conditions such as coolant flow rate, inlet temperature, and inlet air temperature, the heat dissipation of the forced air cooling zone is calculated. The specific calculation process is as follows: the heat dissipation of the forced air cooling zone is calculated, and the heat dissipation calculation of the forced air cooling zone is corrected (that is, the coolant inlet temperature of the forced air cooling zone is subtracted from the heat dissipation air temperature of the heat dissipation system to obtain the forced heat dissipation temperature difference; the forced heat transfer factor of the forced air cooling zone is determined based on the air velocity of the forced air cooling zone, and the forced heat transfer efficiency of the forced air cooling zone is determined based on the forced heat transfer factor; the product of the forced heat transfer efficiency, the forced heat dissipation temperature difference, and the heat capacity is calculated to obtain the forced heat dissipation of the forced air cooling zone).

[0192] The inlet temperature of the natural air-cooled zone (i.e., the coolant inlet temperature of the natural air-cooled zone) is calculated based on the corrected heat dissipation of the forced air-cooled zone. The heat dissipation of the natural air-cooled zone is then calculated based on the inlet temperature, coolant flow rate, inlet temperature, and inlet air temperature, among other external conditions. Specifically, the heat dissipation of the natural air-cooled zone is calculated, and then corrected (i.e., the coolant inlet temperature of the natural air-cooled zone is subtracted from the heat dissipation air temperature to obtain the natural heat dissipation temperature difference; the natural heat transfer factor of the natural air-cooled zone is determined based on the wind speed, and the natural heat transfer efficiency of the natural air-cooled zone is determined based on the natural heat transfer factor; the product of the natural heat transfer efficiency, the natural heat dissipation temperature difference, and the heat capacity is calculated to obtain the natural heat dissipation of the natural air-cooled zone).

[0193] The sum of the corrected forced heat dissipation and the corrected natural heat dissipation is calculated to obtain the total heat dissipation of the semi-forced radiator (that is, the system heat dissipation of the heat dissipation system).

[0194] In this embodiment, the heat dissipation system adopts a semi-forced air-cooled zone to assist in heat dissipation. When calculating the system heat dissipation, the system heat dissipation is calculated in segments, and the heat dissipation of each segment is corrected during the calculation process to improve the accuracy of the system heat dissipation. This improves the accuracy of the wind turbine's air volume and air pressure characteristics, making the system heat dissipation closer to the required heat dissipation, thereby improving the wind turbine's heat dissipation effect.

[0195] Furthermore, based on the first and / or second embodiments described above, a third embodiment of the heat dissipation system control method of the present invention is proposed. In this embodiment, the heat dissipation system is in use, and step S10 involves determining the required heat dissipation of the heat dissipation system, including:

[0196] Step S111: Determine the required heat dissipation of the heat dissipation system based on the incoming wind speed of the natural wind in the environment where the heat dissipation fan is located.

[0197] In this embodiment, the heat dissipation system is in use. At this time, the required heat dissipation of the heat dissipation system can be determined based on the incoming wind speed of the natural wind in the environment where the heat dissipation fan is located. The specific calculation process can be: calculate the working power of the wind turbine generator based on the incoming wind speed of the natural wind; multiply the working power by the heat loss to obtain the required heat dissipation of the wind turbine. There are no restrictions on this.

[0198] In this embodiment, before step S10, which involves determining the system heat dissipation of the heat dissipation system based on the heat dissipation air temperature, heat dissipation air velocity, and coolant inlet temperature, the method further includes:

[0199] Step S40: Use the actual air temperature of the heat dissipation system as the heat dissipation air temperature;

[0200] In this embodiment, the actual air temperature of the heat dissipation system is used as the heat dissipation air temperature. Since the forced air cooling zone and the natural air cooling zone are connected, the actual air temperature of the natural air cooling zone or the actual air temperature of the forced air cooling zone can be used as the heat dissipation air temperature. No limitation is made here.

[0201] Step S50: Take the actual wind speed of the forced air cooling zone as the wind speed of the forced air cooling zone, and take the incoming air speed as the wind speed of the natural air cooling zone.

[0202] The actual wind speed in the forced air cooling zone is taken as the wind speed of the forced air cooling zone, and the incoming air speed is taken as the wind speed of the natural air cooling zone.

[0203] Step S60: The actual inlet temperature of the coolant side of the forced air-cooled zone is taken as the coolant side inlet temperature of the forced air-cooled zone, and the actual inlet temperature of the coolant side of the natural air-cooled zone is taken as the coolant side inlet temperature of the natural air-cooled zone.

[0204] The actual inlet temperature of the coolant side in the forced air-cooled zone is taken as the coolant inlet temperature of the forced air-cooled zone, and the actual inlet temperature of the coolant side in the natural air-cooled zone is taken as the coolant inlet temperature of the natural air-cooled zone.

[0205] Furthermore, in a feasible embodiment, the actual outlet temperature of the coolant side in the forced air-cooled zone can be used as the inlet temperature of the coolant side in the natural air-cooled zone. In this embodiment, the calculation expression for the coolant inlet temperature of the natural air-cooled zone can be:

[0206]

[0207] Where t1' is the coolant inlet temperature of the natural air-cooled zone, t1 is the inlet temperature of the forced air-cooled zone, W1 is the coolant heat capacity, and φ1 is the corrected forced heat dissipation.

[0208] Furthermore, in one feasible embodiment, step S30: adjusting the airflow and air pressure characteristics of the cooling fan in the heat dissipation system includes:

[0209] Step S301: Adjust the fan frequency of the cooling fan in the heat dissipation system to adjust the air volume and air pressure characteristics of the cooling fan.

[0210] In this embodiment, the fan frequency of the cooling fan in the heat dissipation system is adjusted to adjust the airflow and air pressure characteristics of the cooling fan. Specifically, the process of adjusting the fan frequency can be as follows: a frequency adjustment amount is preset for each adjustment; if the system heat dissipation is greater than the required heat dissipation, the fan frequency is reduced according to the frequency adjustment amount; if the system heat dissipation is less than the required heat dissipation, the fan frequency is increased according to the frequency adjustment amount.

[0211] There are two scenarios where the system's heat dissipation does not meet the required heat dissipation: the system's heat dissipation is greater than the required heat dissipation, and the system's heat dissipation is less than the required heat dissipation. Specifically, in one feasible implementation, the fan frequency can be adjusted when the system's heat dissipation is insufficient, i.e., the system's heat dissipation is less than the required heat dissipation. This implementation can minimize the number of times the fan frequency is adjusted while still meeting the fan's heat dissipation requirements. In another feasible implementation, the fan frequency can be adjusted in both cases where the system's heat dissipation is greater than or less than the required heat dissipation. This implementation ensures that the system's heat dissipation is neither too high nor too low while meeting the fan's heat dissipation requirements, thereby reducing the axial fan's power consumption.

[0212] Furthermore, in one feasible implementation, refer to Figure 4 When the wind turbine is in use, the cooling system control process can be as follows:

[0213] The wind turbine power is determined based on the incoming wind speed of the natural wind, and the required heat dissipation of the cooled components is determined based on the wind turbine power.

[0214] The heat dissipation of the radiator is calculated based on the incoming air velocity, air temperature, radiator inlet temperature, and axial fan frequency (that is, the system heat dissipation of the heat dissipation system is determined based on the heat dissipation air temperature, heat dissipation air velocity, and coolant side inlet temperature of the heat dissipation system).

[0215] Check whether the heat dissipation of the radiator meets the heat dissipation requirements of the cooled components (i.e., check whether the heat dissipation of the system meets the required heat dissipation).

[0216] If the heat dissipation of the radiator meets the heat dissipation requirements of the cooled component, the frequency of the axial fan is determined, and the axial fan is operated at the frequency of the axial fan; if the heat dissipation of the radiator does not meet the heat dissipation requirements of the cooled component, the process returns to adjusting the frequency of the axial fan (that is, if the heat dissipation of the system does not meet the required heat dissipation, after adjusting the airflow and air pressure characteristics of the cooling fan in the cooling system, the process returns to the step of detecting whether the heat dissipation of the system meets the required heat dissipation, until the heat dissipation of the system meets the required heat dissipation).

[0217] In this embodiment, the heat dissipation system is in operation. By adjusting the airflow and air pressure characteristics of the axial fan, the heat dissipation of the air-cooled auxiliary heat dissipation is adjusted, thereby adjusting the system heat dissipation of the heat dissipation system. This ensures that the system heat dissipation of the heat dissipation system can meet the actual heat dissipation requirements (i.e., the required heat dissipation) of the wind turbine. Compared to controlling the start and stop of the axial fan, this embodiment can achieve more precise and accurate control of the working state of the axial fan in the heat dissipation system, so that the system heat dissipation of the heat dissipation system meets the required heat dissipation of the wind turbine, thereby improving the heat dissipation effect of the heat dissipation system.

[0218] Furthermore, based on the first, second, and / or third embodiments described above, a fourth embodiment of the heat dissipation system control method of the present invention is proposed. In this embodiment, the heat dissipation system is in a design state; in step S10: determining the required heat dissipation of the heat dissipation system includes:

[0219] Step S102: Use the designed heat dissipation capacity of the heat dissipation system as the required heat dissipation capacity of the heat dissipation system;

[0220] In this embodiment, the heat dissipation system is in the design state, and the design heat dissipation capacity of the heat dissipation system can be used as the required heat dissipation capacity of the heat dissipation system.

[0221] In this embodiment, before step S10, which involves determining the system heat dissipation of the heat dissipation system based on the heat dissipation air temperature, heat dissipation air velocity, and coolant inlet temperature, the method further includes:

[0222] Step S70: Obtain the preset wind speed and designed ventilation area of ​​the forced air cooling zone in the heat dissipation system, and calculate the estimated air volume of the forced air cooling zone;

[0223] Obtain the preset air velocity and design ventilation area of ​​the forced air cooling zone in the heat dissipation system, and calculate the estimated air volume of the forced air cooling zone.

[0224] Step S80: Calculate the estimated wind speed of the forced air cooling zone based on the estimated air volume, and use the estimated wind speed as the wind speed of the forced air cooling zone;

[0225] The estimated wind speed of the forced air cooling zone is calculated based on the estimated air volume, and the estimated wind speed is used as the wind speed of the forced air cooling zone.

[0226] Step S90: The design air temperature of the heat dissipation system is taken as the heat dissipation air temperature, the design air velocity of the natural air cooling zone is taken as the air velocity of the natural air cooling zone, the design inlet temperature of the coolant side of the forced air cooling zone is taken as the coolant side inlet temperature of the forced air cooling zone, and the design inlet temperature of the coolant side of the natural air cooling zone is taken as the coolant side inlet temperature of the natural air cooling zone.

[0227] In this embodiment, the design air temperature of the heat dissipation system is used as the heat dissipation air temperature, the design air speed of the natural air cooling zone is used as the air speed of the natural air cooling zone, the design inlet temperature of the coolant side of the forced air cooling zone is used as the coolant side inlet temperature of the forced air cooling zone, and the design inlet temperature of the coolant side of the natural air cooling zone is used as the coolant side inlet temperature of the natural air cooling zone.

[0228] Furthermore, in one feasible embodiment, step S30: adjusting the airflow and air pressure characteristics of the cooling fan in the heat dissipation system includes:

[0229] Step S302: Adjust the preset wind speed to adjust the airflow and air pressure characteristics of the cooling fan.

[0230] In this embodiment, the preset wind speed is adjusted to adjust the air volume and air pressure characteristics of the cooling fan, so that the designed axial flow fan meets the actual heat dissipation requirements of the wind turbine.

[0231] Furthermore, in one feasible embodiment, after step S20, the method further includes:

[0232] Step A10: If the system's heat dissipation meets the required heat dissipation, then;

[0233] In this embodiment, after detecting whether the heat dissipation of the system meets the required heat dissipation, if the heat dissipation of the system meets the required heat dissipation, the selection of the axial flow fan can be determined based on the design wind speed under this condition. Specifically, the estimated wind pressure of the forced air cooling zone is calculated based on the environmental parameters of the environment to be used by the heat dissipation system and the preset wind speed.

[0234] Step A20: Calculate the estimated power based on the estimated air volume and the estimated air pressure;

[0235] The estimated power is calculated based on the estimated air volume and estimated air pressure.

[0236] Step A30: Based on the estimated air volume, the estimated air pressure, and the estimated power, determine the target axial flow fan from the preset axial flow fans;

[0237] Based on the estimated air volume, estimated air pressure, and estimated power, the target axial flow fan is determined from the preset axial flow fans.

[0238] Step A40: If the expected heat dissipation generated by the target axial flow fan meets the required heat dissipation, then the target axial flow fan is used as the heat dissipation fan of the heat dissipation system.

[0239] After selecting the target axial flow fan, the expected heat dissipation generated by the target axial flow fan is estimated, and it is checked whether the expected heat dissipation meets the required heat dissipation. In this embodiment, the specific method for checking whether the expected heat dissipation meets the required heat dissipation can be referred to step S20, and will not be described in detail here.

[0240] If the expected heat dissipation generated by the target axial flow fan meets the required heat dissipation, then the target axial flow fan can meet the heat dissipation requirements of the wind turbine. Therefore, the target axial flow fan is used as the heat dissipation fan of the heat dissipation system.

[0241] Furthermore, in one feasible implementation, refer to Figure 5 The process of designing the fan before the cooling system is put into use can be as follows:

[0242] Determine the required heat dissipation φ. Given the initial air velocity V and ventilation area A of the forced air cooling zone, calculate the system heat dissipation φ' of the cooling system under the given initial air velocity V and ventilation area A.

[0243] Based on the preset first safety margin coefficient s1, the preset second safety margin coefficient s2, and the required heat dissipation, the first heat dissipation margin range [s1*φ, s2*φ] of the heat dissipation system is determined, and it is detected whether the system heat dissipation is within the first heat dissipation margin range (that is, whether the system heat dissipation meets the required heat dissipation).

[0244] If the system heat dissipation is not within the first heat dissipation margin range, then after adjusting the forced air speed in the forced air cooling zone of the heat dissipation system, the process returns to the step of detecting whether the system heat dissipation is within the first heat dissipation margin range (that is, if the system heat dissipation does not meet the required heat dissipation, then after adjusting the airflow and air pressure characteristics of the cooling fan in the heat dissipation system, the process returns to the step of detecting whether the system heat dissipation meets the required heat dissipation).

[0245] If the system heat dissipation is within the first heat dissipation margin, then axial flow fan selection is performed (that is, if the system heat dissipation meets the required heat dissipation, then based on the environmental parameters of the environment to be used by the heat dissipation system and the preset wind speed, the estimated wind pressure of the forced air cooling zone is calculated; based on the estimated air volume and the estimated wind pressure, the estimated power is calculated; based on the estimated air volume, the estimated wind pressure and the estimated power, the target axial flow fan is determined from the preset axial flow fans).

[0246] Calculate the estimated heat dissipation φ after selection, and check whether the estimated heat dissipation is within the first heat dissipation margin. If the estimated heat dissipation is within the first heat dissipation margin, then determine the axial flow fan (that is, if the expected heat dissipation generated by the target axial flow fan meets the required heat dissipation, then the target axial flow fan is used as the cooling fan of the cooling system); if the estimated heat is not within the first heat dissipation margin, return to the step of adjusting the forced air velocity of the forced air cooling zone in the cooling system.

[0247] In this embodiment, the selection of the axial flow fan is determined by adjusting the air volume and air pressure characteristics of the axial flow fan, so that the selection of the axial flow fan is more in line with the actual production needs of the wind turbine. This allows the system heat dissipation of the heat dissipation system to meet the actual heat dissipation needs of the wind turbine. This embodiment can achieve more precise and accurate control of the working state of the axial flow fan in the heat dissipation system, so that the system heat dissipation of the heat dissipation system meets the heat dissipation needs of the wind turbine, thereby improving the heat dissipation effect of the heat dissipation system.

[0248] Furthermore, embodiments of the present invention also propose a heat dissipation system control device, referring to... Figure 6 The heat dissipation system control device includes:

[0249] The determination module 10 is used to determine the required heat dissipation of the heat dissipation system, and to determine the system heat dissipation of the heat dissipation system based on the heat dissipation air temperature, heat dissipation air velocity and coolant inlet temperature.

[0250] Detection module 20 is used to detect whether the heat dissipation of the system meets the required heat dissipation.

[0251] The adjustment module 30 is used to adjust the airflow and air pressure characteristics of the cooling fan in the cooling system if the heat dissipation of the system does not meet the required heat dissipation, and then return to the step of detecting whether the heat dissipation of the system meets the required heat dissipation, until the heat dissipation of the system meets the required heat dissipation.

[0252] Furthermore, the cooling air velocity includes at least: the air velocity in the forced air cooling zone of the cooling system and the air velocity in the natural air cooling zone of the cooling system;

[0253] The coolant-side inlet temperature includes at least the coolant-side inlet temperature of the forced air-cooled zone and the coolant-side inlet temperature of the natural air-cooled zone;

[0254] The determining module 10 is further configured to:

[0255] The forced cooling temperature difference is obtained by subtracting the cooling air temperature of the heat dissipation system from the coolant inlet temperature of the forced air cooling zone.

[0256] The forced heat transfer factor of the forced air-cooling zone is determined based on the wind speed in the forced air-cooling zone, and the forced heat transfer efficiency of the forced air-cooling zone is determined based on the forced heat transfer factor.

[0257] Calculate the product of the forced heat exchange efficiency, the forced heat dissipation temperature difference, and the heat capacity to obtain the forced heat dissipation of the forced air-cooled zone;

[0258] Calculate the coolant inlet temperature of the natural air cooling zone and subtract the heat dissipation air temperature to obtain the natural heat dissipation temperature difference;

[0259] The natural heat transfer factor of the natural air-cooled zone is determined based on the wind speed in the natural air-cooled zone, and the natural heat transfer efficiency of the natural air-cooled zone is determined based on the natural heat transfer factor.

[0260] Calculate the product of the natural heat exchange efficiency, the natural heat dissipation temperature difference, and the heat capacity to obtain the natural heat dissipation of the natural air-cooled zone;

[0261] Calculate the sum of the forced heat dissipation and the natural heat dissipation to obtain the system heat dissipation of the heat dissipation system.

[0262] Furthermore, the determining module 10 is also used for:

[0263] The forced heat transfer factor is corrected by a preset first correction factor to obtain the corrected forced heat transfer factor.

[0264] The heat exchange efficiency of the forced air-cooled zone is calculated using the corrected forced heat transfer factor.

[0265] The step of determining the natural heat transfer efficiency of the naturally air-cooled zone based on the natural heat transfer factor includes:

[0266] The natural heat transfer factor is corrected by a preset second correction coefficient to obtain the corrected natural heat transfer factor.

[0267] The heat exchange efficiency of the natural air-cooled zone is calculated using the corrected natural heat transfer factor.

[0268] Furthermore, the determining module 10 is also used for:

[0269] Based on the airflow and air pressure curves of the axial fan and the resistance curve of the radiator in the forced air cooling zone, the required airflow of the forced air cooling zone is calculated.

[0270] Based on the required air volume and the ventilation area of ​​the forced air cooling zone, the base wind speed of the forced air cooling zone is calculated.

[0271] The base wind speed is corrected by a preset wind speed correction coefficient and the incoming wind speed, and the corrected base wind speed is used as the wind speed of the forced air cooling zone.

[0272] Furthermore, the heat dissipation system is in operation; the determining module 10 is also used for:

[0273] The required heat dissipation of the cooling system is determined based on the incoming wind speed of the natural wind in the environment where the cooling fan is located.

[0274] The determining module 10 is further configured to:

[0275] The actual air temperature of the heat dissipation system is taken as the heat dissipation air temperature of the heat dissipation system.

[0276] The actual wind speed in the forced air cooling zone is taken as the wind speed in the forced air cooling zone, and the incoming air speed is taken as the wind speed in the natural air cooling zone.

[0277] The actual inlet temperature of the coolant side in the forced air-cooled zone is taken as the coolant inlet temperature of the forced air-cooled zone, and the actual inlet temperature of the coolant side in the natural air-cooled zone is taken as the coolant inlet temperature of the natural air-cooled zone.

[0278] Furthermore, the adjustment module 30 is also used for:

[0279] Adjust the fan frequency of the cooling fan in the cooling system to adjust the airflow and air pressure characteristics of the cooling fan.

[0280] Furthermore, the heat dissipation system is in the design state; the determining module 10 is also used for:

[0281] The designed heat dissipation capacity of the heat dissipation system is taken as the required heat dissipation capacity of the heat dissipation system.

[0282] The determining module 10 is further configured to:

[0283] Obtain the preset wind speed and designed ventilation area of ​​the forced air cooling zone in the heat dissipation system, and calculate the estimated air volume of the forced air cooling zone.

[0284] The estimated wind speed of the forced air cooling zone is calculated based on the estimated air volume, and the estimated wind speed is used as the wind speed of the forced air cooling zone.

[0285] The design air temperature of the heat dissipation system is used as the heat dissipation air temperature, the design air velocity of the natural air cooling zone is used as the air velocity of the natural air cooling zone, the design inlet temperature of the coolant side of the forced air cooling zone is used as the coolant side inlet temperature of the forced air cooling zone, and the design inlet temperature of the coolant side of the natural air cooling zone is used as the coolant side inlet temperature of the natural air cooling zone.

[0286] Furthermore, the adjustment module 30 is also used for:

[0287] The preset wind speed is adjusted to adjust the airflow and air pressure characteristics of the cooling fan.

[0288] Furthermore, the heat dissipation system control device also includes a selection module for:

[0289] If the heat dissipation of the system meets the required heat dissipation, then the estimated wind pressure of the forced air cooling zone is calculated based on the environmental parameters of the environment in which the heat dissipation system is to be used and the preset wind speed.

[0290] The estimated power is calculated based on the estimated air volume and the estimated air pressure.

[0291] Based on the estimated air volume, the estimated air pressure, and the estimated power, a target axial flow fan is determined from the preset axial flow fans;

[0292] If the expected heat dissipation generated by the target axial flow fan meets the required heat dissipation, then the target axial flow fan will be used as the heat dissipation fan of the heat dissipation system.

[0293] All embodiments of the heat dissipation system control device of the present invention can refer to the various embodiments of the heat dissipation system control method of the present invention, and will not be described again here.

[0294] This invention also proposes a wind turbine generator set, which includes a heat dissipation system. The heat dissipation system performs the steps of the heat dissipation system control method described below.

[0295] All embodiments of the wind turbine generator set of the present invention can refer to the various embodiments of the heat dissipation system control method of the present invention, which will not be repeated here.

[0296] Furthermore, embodiments of the present invention also propose a computer-readable storage medium storing a heat dissipation system control program, wherein when the heat dissipation system control program is executed by a processor, it implements the steps of the heat dissipation system control method described below.

[0297] The embodiments of the heat dissipation system control device and computer-readable storage medium of the present invention can be referred to the embodiments of the heat dissipation system control method of the present invention, and will not be repeated here.

[0298] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0299] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0300] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0301] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. A method for controlling a heat dissipation system, characterized in that, The heat dissipation system control method includes the following steps: Determine the required heat dissipation of the heat dissipation system, and determine the system heat dissipation based on the heat dissipation air temperature, heat dissipation air velocity and coolant inlet temperature of the heat dissipation system; Check whether the system's heat dissipation meets the required heat dissipation. If the system heat dissipation does not meet the required heat dissipation, then after adjusting the airflow and air pressure characteristics of the cooling fan in the heat dissipation system, the process returns to the step of detecting whether the system heat dissipation meets the required heat dissipation, until the system heat dissipation meets the required heat dissipation. The cooling air velocity includes at least the air velocity in the forced air cooling zone of the cooling system and the air velocity in the natural air cooling zone of the cooling system. The coolant-side inlet temperature includes at least the coolant-side inlet temperature of the forced air-cooled zone and the coolant-side inlet temperature of the natural air-cooled zone; The step of determining the system heat dissipation of the heat dissipation system based on the heat dissipation air temperature, heat dissipation air velocity, and coolant inlet temperature includes: The forced cooling temperature difference is obtained by subtracting the cooling air temperature of the heat dissipation system from the coolant inlet temperature of the forced air cooling zone. The forced heat transfer factor of the forced air-cooling zone is determined based on the wind speed in the forced air-cooling zone, and the forced heat transfer efficiency of the forced air-cooling zone is determined based on the forced heat transfer factor. Calculate the product of the forced heat exchange efficiency, the forced heat dissipation temperature difference, and the heat capacity to obtain the forced heat dissipation of the forced air-cooled zone; Calculate the coolant inlet temperature of the natural air cooling zone and subtract the heat dissipation air temperature to obtain the natural heat dissipation temperature difference; The natural heat transfer factor of the natural air-cooled zone is determined based on the wind speed in the natural air-cooled zone, and the natural heat transfer efficiency of the natural air-cooled zone is determined based on the natural heat transfer factor. Calculate the product of the natural heat exchange efficiency, the natural heat dissipation temperature difference, and the heat capacity to obtain the natural heat dissipation of the natural air-cooled zone; Calculate the sum of the forced heat dissipation and the natural heat dissipation to obtain the system heat dissipation of the heat dissipation system.

2. The heat dissipation system control method as described in claim 1, characterized in that, The step of determining the forced heat transfer efficiency of the forced air-cooled zone based on the forced heat transfer factor includes: The forced heat transfer factor is corrected by a preset first correction factor to obtain the corrected forced heat transfer factor. The heat exchange efficiency of the forced air-cooled zone is calculated using the corrected forced heat transfer factor. The step of determining the natural heat transfer efficiency of the naturally air-cooled zone based on the natural heat transfer factor includes: The natural heat transfer factor is corrected by a preset second correction coefficient to obtain the corrected natural heat transfer factor. The heat exchange efficiency of the natural air-cooled zone is calculated using the corrected natural heat transfer factor.

3. The heat dissipation system control method as described in claim 1, characterized in that, Before the step of determining the forced heat transfer factor of the forced air-cooled zone based on the wind speed of the forced air-cooled zone, the method further includes: Based on the airflow and air pressure curves of the axial fan and the resistance curve of the radiator in the forced air cooling zone, the required airflow of the forced air cooling zone is calculated. Based on the required air volume and the ventilation area of ​​the forced air cooling zone, the base wind speed of the forced air cooling zone is calculated. The base wind speed is corrected by a preset wind speed correction coefficient and the incoming wind speed, and the corrected base wind speed is used as the wind speed of the forced air cooling zone.

4. The heat dissipation system control method as described in claim 1, characterized in that, The heat dissipation system is in use. The steps for determining the required heat dissipation of the cooling system include: The required heat dissipation of the cooling system is determined based on the incoming wind speed of the natural wind in the environment where the cooling fan is located. Before the step of determining the system heat dissipation of the heat dissipation system based on the heat dissipation air temperature, heat dissipation air velocity, and coolant inlet temperature, the method further includes: The actual air temperature of the heat dissipation system is taken as the heat dissipation air temperature of the heat dissipation system. The actual wind speed in the forced air cooling zone is taken as the wind speed in the forced air cooling zone, and the incoming air speed is taken as the wind speed in the natural air cooling zone. The actual inlet temperature of the coolant side in the forced air-cooled zone is taken as the coolant inlet temperature of the forced air-cooled zone, and the actual inlet temperature of the coolant side in the natural air-cooled zone is taken as the coolant inlet temperature of the natural air-cooled zone.

5. The heat dissipation system control method as described in claim 4, characterized in that, The steps for adjusting the airflow and air pressure characteristics of the cooling fan in the cooling system include: Adjust the fan frequency of the cooling fan in the cooling system to adjust the airflow and air pressure characteristics of the cooling fan.

6. The heat dissipation system control method as described in claim 1, characterized in that, The heat dissipation system is in the design phase; The steps for determining the required heat dissipation of the cooling system include: The designed heat dissipation capacity of the heat dissipation system is taken as the required heat dissipation capacity of the heat dissipation system. Before the step of determining the system heat dissipation of the heat dissipation system based on the heat dissipation air temperature, heat dissipation air velocity, and coolant inlet temperature, the method further includes: Obtain the preset wind speed and designed ventilation area of ​​the forced air cooling zone in the heat dissipation system, and calculate the estimated air volume of the forced air cooling zone. The estimated wind speed of the forced air cooling zone is calculated based on the estimated air volume, and the estimated wind speed is used as the wind speed of the forced air cooling zone. The design air temperature of the heat dissipation system is used as the heat dissipation air temperature, the design air velocity of the natural air cooling zone is used as the air velocity of the natural air cooling zone, the design inlet temperature of the coolant side of the forced air cooling zone is used as the coolant side inlet temperature of the forced air cooling zone, and the design inlet temperature of the coolant side of the natural air cooling zone is used as the coolant side inlet temperature of the natural air cooling zone.

7. The heat dissipation system control method as described in claim 6, characterized in that, The steps for adjusting the airflow and air pressure characteristics of the cooling fan in the cooling system include: The preset wind speed is adjusted to adjust the airflow and air pressure characteristics of the cooling fan.

8. The heat dissipation system control method as described in any one of claims 6 to 7, characterized in that, After the step of detecting whether the system's heat dissipation meets the required heat dissipation, the method further includes: If the heat dissipation of the system meets the required heat dissipation, then the estimated wind pressure of the forced air cooling zone is calculated based on the environmental parameters of the environment in which the heat dissipation system is to be used and the preset wind speed. The estimated power is calculated based on the estimated air volume and the estimated air pressure. Based on the estimated air volume, the estimated air pressure, and the estimated power, a target axial flow fan is determined from the preset axial flow fans; If the expected heat dissipation generated by the target axial flow fan meets the required heat dissipation, then the target axial flow fan will be used as the heat dissipation fan of the heat dissipation system.

9. A wind turbine generator set, characterized in that, The wind turbine generator set includes a heat dissipation system, and the heat dissipation system performs the steps of the heat dissipation system control method as described in any one of claims 1 to 8 when dissipating heat.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a heat dissipation system control program, which, when executed by a processor, implements the steps of the heat dissipation system control method as described in any one of claims 1 to 8.

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