Variable-frequency intelligent heat dissipation device for wind power plant generator

Abstract

The invention discloses a frequency conversion intelligent heat dissipation device for a wind power plant generator, and the device comprises a first heat dissipation fin, a second heat dissipation fin, a third heat dissipation fin, a heat conduction pipe, a temperature sensor, a first fan, a second fan and a processor, and the heat dissipation capability of the first heat dissipation fin, the second heat dissipation fin and the third heat dissipation fin is combined in different time periods. The operation turning direction and the operation rotating speed of the first fan and the second fan are dynamically adjusted, the cooling fins can be cooled in time through airflow conveying control while the double-cooling scheme of cooling fins and air cooling is achieved, basic preparation is made in advance for follow-up cooling when the temperature is too high, and the cooling efficiency is improved. Therefore, the frequency conversion heat dissipation device can intelligently achieve the cooling and heat dissipation effects on the wind power plant generator, and the working stability and reliability of the generator are effectively guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of heat dissipation processing for generators, and in particular to an intelligent heat dissipation device for frequency conversion of generators in wind farms. Background Art

[0002] Wind farm generators are the core equipment for converting wind energy into electrical energy. Wind farm generators are classified according to their working principles as follows: (1) Synchronous generators: There is a DC excitation winding on the rotor, which generates a magnetic field when DC power is applied. When the rotor rotates, the magnetic field rotates accordingly, and the stator winding cuts the magnetic lines of force, generating an induced electromotive force, thereby outputting electrical energy. Its rotor speed is the same as the speed of the stator rotating magnetic field, that is, the synchronous speed. This synchronous generator can output a relatively stable voltage and frequency, has strong adaptability to the power grid, is suitable for connecting large wind farms to the power grid, and can effectively improve the stability of the power grid and the quality of electric energy. (2) Asynchronous generators: The rotor does not require an external DC power supply for excitation, and its structure is simple, similar to a squirrel cage motor. When the wind drives the wind wheel to rotate and drives the rotor of the generator to rotate in the stator magnetic field, the rotor conductor cuts the magnetic lines of force of the stator magnetic field, generating induced current and electromagnetic torque, causing the rotor to rotate. The rotor speed is slightly lower than the synchronous speed of the stator rotating magnetic field, and there is a slip rate. Asynchronous generators have a simple structure, low cost, high reliability, and do not require a complex excitation system, and have low maintenance costs. It can still adapt well when the wind speed changes greatly and has strong overload capacity.

[0003] Different types of wind farm generators will face heat dissipation problems. If the temperature of the generator is too high, its working stability cannot be guaranteed. Therefore, a suitable heat dissipation device is needed to effectively dissipate the heat of the heating parts of the generator. However, the existing heat dissipation method usually uses heat sinks or cooling fans to discharge heat. However, this method has a relatively single heat dissipation path and a limited upper limit on heat dissipation, and cannot effectively ensure dynamic adjustment of heat dissipation to meet heat dissipation requirements. Summary of the invention

[0004] In an exemplary embodiment of the present application, a variable frequency intelligent heat dissipation device for a wind farm generator is provided, which can dynamically adjust the heat dissipation mode by adjusting the operating state of the variable frequency fan, thereby optimizing the heat dissipation performance of the wind farm generator.

[0005] The present application provides a variable frequency intelligent heat dissipation device for a wind farm generator, comprising: a first heat sink, a second heat sink, a third heat sink, a heat pipe, a temperature sensor, a first fan, a second fan and a processor;

[0006] The first heat sink, the second heat sink and the third heat sink are connected through the heat pipe, the second heat sink and the third heat sink are respectively located at two ends of the heat pipe, and the first heat sink is connected to the middle of the heat pipe;

[0007] In the vertical direction, the second heat sink is located above the first heat sink, the third heat sink is located above the second heat sink, the first heat sink is attached to the heat generating component of the generator, the temperature sensor is attached to the heat generating component, and the temperature sensor is used to detect the operating temperature of the heat generating component;

[0008] The cross-sectional area of ​​the first heat sink along the horizontal direction is the first cross-sectional area, the cross-sectional area of ​​the second heat sink along the horizontal direction is the second cross-sectional area, the cross-sectional area of ​​the third heat sink along the horizontal direction is the third cross-sectional area, the third cross-sectional area is larger than the second cross-sectional area, and the second cross-sectional area is larger than the first cross-sectional area;

[0009] The first fan is arranged between the first heat sink and the second heat sink, the second fan is arranged between the second heat sink and the third heat sink, the first fan and the second fan are connected to the processor, and the processor controls the rotation speed and direction of the first fan and the second fan;

[0010] The processor is configured to: if the operating temperature is greater than a preset temperature, drive the first fan to operate at a first speed along a first direction within a first time period and drive the second fan to stop operating;

[0011] In a second time period after the first time period, the first fan is maintained to rotate at the first speed along the first direction and the second fan is driven to rotate at the first speed along the first direction;

[0012] In a third time period after the second time period, the first fan is maintained to rotate at a third speed along the first direction and the second fan is driven to rotate at a second speed along the second direction;

[0013] When the first fan rotates along the first direction, the airflow can flow from the first heat sink to the second heat sink. When the second fan rotates along the first direction, the airflow can flow from the second heat sink to the third heat sink. The second direction is opposite to the first direction.

[0014] Furthermore, the heat conducting pipe is disposed inside the first heat sink, the second heat sink and the third heat sink.

[0015] Furthermore, both the first fan and the second fan are axial flow fans.

[0016] Further, the first rotational speed is lower than the second rotational speed, and the third rotational speed is lower than the first rotational speed.

[0017] Further, the processor is also configured to: drive the first fan and the second fan to stop running in a fourth time period after the third time period.

[0018] Furthermore, a connection seat is provided on the first heat sink, and the first heat sink is connected to the heat generating component via the connection seat.

[0019] Furthermore, a plurality of the heat-conducting pipes are respectively disposed inside the first heat sink, the second heat sink and the third heat sink, and the heat-conducting pipes are made of copper.

[0020] Further, the first fan and the second fan are respectively arranged on both sides of the third heat sink in the vertical direction.

[0021] The embodiments of the present application have the following beneficial effects: by combining the heat dissipation capabilities of the first heat sink, the second heat sink, and the third heat sink in different time periods, the running direction and running speed of the first fan and the second fan are dynamically adjusted, while realizing the dual heat dissipation solution of heat sink and air cooling, the heat sink can be cooled in time through the air flow delivery control, so as to make basic preparations in advance for the subsequent heat dissipation when the temperature is too high. Therefore, the variable frequency heat dissipation device can intelligently realize the cooling and heat dissipation effect of the wind farm generator, effectively ensuring the working stability and reliability of the generator. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0023] Figure 1 The schematic diagram of the structure of a variable frequency intelligent heat dissipation device for a wind farm generator provided by an embodiment of the present application is exemplarily shown;

[0024] Figure 2 The schematic diagram of the structure of a variable frequency intelligent heat dissipation device for a wind farm generator provided by an embodiment of the present application is exemplarily shown;

[0025] Figure 3 An exemplary operation timing diagram of the first fan provided in an embodiment of the present application is shown;

[0026] Figure 4 The following is an exemplary diagram showing the operation timing of the second fan provided in the embodiment of the present application.

[0027] Figure 5A system schematic diagram of a variable frequency intelligent heat dissipation device for a wind farm generator provided in an embodiment of the present application is exemplarily shown. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0029] To further illustrate the technical solution provided by the embodiment of the present application, a detailed description is given below in conjunction with the accompanying drawings and specific implementation methods. Although the embodiment of the present application provides the operating steps of the variable frequency intelligent heat dissipation device for wind farm generators as shown in the following embodiments or drawings, more or fewer operating steps may be included in the variable frequency intelligent heat dissipation device for wind farm generators based on routine or no creative labor. In the steps that do not logically have a necessary causal relationship, the execution order of these steps is not limited to the execution order provided in the embodiment of the present application.

[0030] refer to Figure 1-5 As shown, the present application provides a variable frequency intelligent heat dissipation device for a wind farm generator, comprising: a first heat sink 11, a second heat sink 12, a third heat sink 13, a heat pipe 14, a temperature sensor 24, a first fan 21, a second fan 22 and a processor 23.

[0031] The first heat sink 11, the second heat sink 12 and the third heat sink 13 are connected through a heat pipe 14, the second heat sink 12 and the third heat sink 13 are respectively located at both ends of the heat pipe 14, and the first heat sink 11 is connected to the middle of the heat pipe 14. The heat pipe 14 is arranged inside the first heat sink 11, the second heat sink 12 and the third heat sink 13, and multiple heat pipes 14 are respectively arranged inside the first heat sink 11, the second heat sink 12 and the third heat sink 13. The heat pipe 14 is made of copper, and the heat transfer between the first heat sink 11, the second heat sink 12 and the third heat sink 13 is realized by the heat pipe 14.

[0032] In the vertical direction, the second heat sink 12 is located above the first heat sink 11, and the third heat sink 13 is located above the second heat sink 12. The first heat sink 11 is attached to the heat-generating component of the generator. A connecting seat is provided on the first heat sink 11, and the first heat sink 11 is connected to the heat-generating component through the connecting seat.

[0033] The temperature sensor 24 is attached to the heat generating component. The temperature sensor 24 is used to detect the working temperature of the heat generating component. The temperature sensor 24 is used to send the detected working temperature to the processor 23 for determination.

[0034] The cross-sectional area of ​​the first heat sink 11 along the horizontal direction is a first cross-sectional area, the cross-sectional area of ​​the second heat sink 12 along the horizontal direction is a second cross-sectional area, and the cross-sectional area of ​​the third heat sink 13 along the horizontal direction is a third cross-sectional area. The third cross-sectional area is larger than the second cross-sectional area, and the second cross-sectional area is larger than the first cross-sectional area.

[0035] The first fan 21 is disposed between the first heat sink 11 and the second heat sink 12 , the second fan 22 is disposed between the second heat sink 12 and the third heat sink 13 , and the first fan 21 and the second fan 22 are respectively disposed on both sides of the third heat sink 13 in the vertical direction.

[0036] The first fan 21 and the second fan 22 are connected to the processor 23, and the processor 23 controls the rotation speed and direction of the first fan 21 and the second fan 22. In the embodiment of the present application, the first fan 21 and the second fan 22 are both axial flow fans. Specifically, the first fan 21 and the second fan 22 are driven by variable frequency motors, wherein the frequency and voltage of the input signal are adjusted by the frequency converter to control the rotation speed of the motor, thereby driving the fan blades to rotate and generate airflow. An ordinary single-frequency motor is transformed into a motor that supports variable frequency and is controlled by a frequency converter. For example, when a large air volume is required, the frequency converter outputs a signal with a higher frequency and voltage to increase the motor speed; when a small air volume is required, the frequency converter outputs a signal with a lower frequency and voltage, and the motor speed is reduced. Accordingly, the fan's steering can also be adjusted by adjusting the direction of the motor to adjust the direction of the conveying airflow.

[0037] When the first fan 21 rotates along the first direction, the airflow can flow from the first heat sink 11 to the second heat sink 12. When the second fan 22 rotates along the first direction, the airflow can flow from the second heat sink 12 to the third heat sink 13. The second direction is opposite to the first direction.

[0038] The processor 23 is configured to: if the operating temperature is greater than the preset temperature, drive the first fan 21 to operate at the first speed along the first direction within the first time period and drive the second fan 22 to stop operating. When the operating temperature of the heat generating component of the generator is high, that is, greater than the preset temperature, drive the first fan 21 to operate to discharge the airflow outward, and the airflow flows from the first heat sink 11 to the second heat sink 12 and is transported toward the outside to discharge the heat absorbed by the surface of the first heat sink 11 attached to the heat generating component outward. At this time, since less heat is transferred to the third heat sink 13 through the heat pipe 14, in order to reduce energy consumption, drive the second fan 22 to stop operating. In this stage, heat dissipation and cooling are only performed through the first heat sink 11, the second heat sink 12 and the first fan 21.

[0039] In the second time period after the first time period, the first fan 21 is maintained to run at the first speed along the first direction and the second fan 22 is driven to run at the first speed along the first direction. At this time, part of the heat is transferred to the third heat sink 13 via the heat pipe 14, and the second fan 22 is driven to run at the first speed to achieve the flow of air from the second heat sink 12 to the third heat sink 13, thereby further dissipating the heat of the heat sink itself and improving the heat dissipation and cooling effect.

[0040] In a third time period after the second time period, the first fan 21 is maintained to rotate at a third speed along the first direction and the second fan 22 is driven to rotate at a second speed along the second direction. The first speed is lower than the second speed, and the third speed is lower than the first speed.

[0041] At this time, the direction of the second fan 22 is switched, and the second fan 22 is operated at a higher second speed, and the speed of the first fan 21 is reduced, so that the first fan 21 runs at a lower speed and delivers an upward-flowing airflow, and at the same time, the second fan 22 runs at a higher speed and delivers a downward-flowing airflow, and the downward-flowing airflow specifically flows from the outside of the third heat sink 13 to the side of the third heat sink 13 facing the second heat sink 12, and then the third heat sink 13 is effectively cooled by the external introduced airflow, and at the same time, the smaller airflow delivered by the first fan 21 realizes a reverse impact on the airflow delivered by the second fan 22, and then the airflow delivered by the second fan 22 can be temporarily retained in the third heat sink 13 itself for a longer time under the effect of the reverse convection impact of the airflow provided by the first fan 21, and then the third heat sink 13 itself can be effectively cooled, so as to be used for cooling when the operating temperature of the heat-generating components of the generator exceeds the preset temperature again.

[0042] In this embodiment, the third heat sink 13 has the largest cross-sectional area and its heat dissipation capacity is correspondingly the highest. Therefore, it is necessary to focus on its heat dissipation capacity as the main heat dissipation component. While solving the problem of excessive heat dissipation this time, it is necessary to consider the ability to solve subsequent heat dissipation continuation problems. Therefore, the heat dissipation reserve capacity of the heat sink can be effectively improved by controlling the operation of the first fan 21 and the second fan 22.

[0043] The processor 23 is further configured to: drive the first fan 21 and the second fan 22 to stop running in a fourth time period after the third time period.

[0044] By combining the heat dissipation capabilities of the first heat sink 11, the second heat sink 12, and the third heat sink 13 in different time periods, the running direction and running speed of the first fan 21 and the second fan 22 are dynamically adjusted. While realizing the dual heat dissipation solution of heat sink and air cooling, the heat sink can be cooled in time through the air flow delivery control to make basic preparations in advance for subsequent heat dissipation when the temperature is too high. Therefore, the variable frequency heat dissipation device can intelligently realize the cooling and heat dissipation effect of the wind farm generator, effectively ensuring the working stability and reliability of the generator.

[0045] Those skilled in the art should understand that the embodiments of the present application can be provided as a variable frequency intelligent heat dissipation device, system, or computer program product for a wind farm generator. Therefore, the present application can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present application can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0046] The present application is described with reference to the flowcharts and / or block diagrams of the variable frequency intelligent heat dissipation device, equipment (system), and computer program product for wind farm generators according to the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0047] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0048] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0049] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A variable frequency intelligent heat dissipation device for wind farm generators, characterized in that: include: A first heat sink, a second heat sink, a third heat sink, a heat pipe, a temperature sensor, a first fan, a second fan and a processor; The first heat sink, the second heat sink and the third heat sink are connected through the heat pipe, the second heat sink and the third heat sink are respectively located at two ends of the heat pipe, and the first heat sink is connected to the middle of the heat pipe; In the vertical direction, the second heat sink is located above the first heat sink, the third heat sink is located above the second heat sink, the first heat sink is attached to the heat generating component of the generator, the temperature sensor is attached to the heat generating component, and the temperature sensor is used to detect the operating temperature of the heat generating component; The cross-sectional area of ​​the first heat sink along the horizontal direction is the first cross-sectional area, the cross-sectional area of ​​the second heat sink along the horizontal direction is the second cross-sectional area, the cross-sectional area of ​​the third heat sink along the horizontal direction is the third cross-sectional area, the third cross-sectional area is larger than the second cross-sectional area, and the second cross-sectional area is larger than the first cross-sectional area; The first fan is arranged between the first heat sink and the second heat sink, the second fan is arranged between the second heat sink and the third heat sink, the first fan and the second fan are connected to the processor, and the processor controls the rotation speed and direction of the first fan and the second fan; The processor is configured to: if the operating temperature is greater than a preset temperature, drive the first fan to operate at a first speed along a first direction within a first time period and drive the second fan to stop operating; In a second time period after the first time period, the first fan is maintained to rotate at the first speed along the first direction and the second fan is driven to rotate at the first speed along the first direction; In a third time period after the second time period, the first fan is maintained to rotate at a third speed along the first direction and the second fan is driven to rotate at a second speed along the second direction; When the first fan rotates along the first direction, the airflow can flow from the first heat sink to the second heat sink. When the second fan rotates along the first direction, the airflow can flow from the second heat sink to the third heat sink. The second direction is opposite to the first direction.

2. The variable frequency intelligent heat dissipation device for wind farm generators according to claim 1 is characterized in that: The heat conducting pipe is disposed inside the first heat sink, the second heat sink and the third heat sink.

3. The variable frequency intelligent heat dissipation device for wind farm generators according to claim 1 is characterized in that: The first fan and the second fan are both axial flow fans.

4. The variable frequency intelligent heat dissipation device for wind farm generators according to claim 1 is characterized in that: The first rotation speed is lower than the second rotation speed, and the third rotation speed is lower than the first rotation speed.

5. The variable frequency intelligent heat dissipation device for wind farm generators according to claim 1 is characterized in that: The processor is further configured to: drive the first fan and the second fan to stop running in a fourth time period after the third time period.

6. The variable frequency intelligent heat dissipation device for wind farm generators according to claim 5 is characterized in that: A connecting seat is arranged on the first heat sink, and the first heat sink is connected to the heat generating component via the connecting seat.

7. The variable frequency intelligent heat dissipation device for wind farm generators according to claim 1 is characterized in that: The plurality of heat-conducting pipes are respectively arranged inside the first heat sink, the second heat sink and the third heat sink, and the heat-conducting pipes are made of copper.

8. The variable frequency intelligent heat dissipation device for wind farm generators according to claim 1 is characterized in that: The first fan and the second fan are respectively arranged on both sides of the third heat sink in the vertical direction.

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