Temperature control system for cabin of wind driven generator

Abstract

The invention relates to the technical field of wind power generation, in particular to a temperature control system for a cabin of a wind driven generator, which comprises an acquisition unit for monitoring the current temperature in the cabin and the current temperature and humidity outside the cabin; the temperature adjusting unit has a cold air flow / hot air flow output function, and the current temperature reaches the set target temperature by conveying cold air flow / hot air flow into the cabin; the control unit is provided with a cold air flow / hot air flow output quantity accounting module and an execution module used for controlling the temperature adjusting unit to operate; the closed-loop control algorithm and the accurate airflow channel design are adopted, the adjusting sensitivity and the control accuracy of the cabin temperature control system of the wind driven generator are remarkably improved, the airflow flowing path is optimized, and the condensation and removal efficiency of water vapor is enhanced; in addition, the system can adapt to different environmental conditions through the dynamically adjusted proportion, integral and differential coefficients, and the stability and reliability of temperature adjustment are ensured.

Description

Technical Field

[0001] This invention relates to the field of wind power generation technology, and in particular to a temperature control system for wind turbine nacelles. Background Technology

[0002] With the rapid development of wind power generation technology, the operating efficiency and reliability of wind turbine generator sets are receiving increasing attention. The nacelle of a wind turbine generator contains various key equipment, such as generators, converters, and control systems. The normal operation of these devices has strict temperature requirements. Excessive or insufficient temperature inside the nacelle may affect the performance and lifespan of the equipment, or even lead to failure. Therefore, it is particularly important to develop a system that can effectively control the temperature inside the nacelle.

[0003] Existing wind turbine nacelle temperature control systems mostly employ simple open-loop control or basic closed-loop control methods. These systems are insufficient in terms of temperature regulation sensitivity and accuracy, making it difficult to adapt to changes in the external environment and fluctuations in the internal heat load of the nacelle. In addition, the components used for compressed air drying in existing systems are inefficient, resulting in high water vapor content in the compressed air, which affects the temperature regulation effect and also increases the humidity inside the nacelle, further deteriorating the operating environment of the equipment. Summary of the Invention

[0004] In view of the problems existing in the temperature control system for wind turbine nacelles, the present invention is proposed.

[0005] The above-mentioned technical problems are solved by the following technical solution: This invention proposes a temperature control system for wind turbine nacelles, comprising,

[0006] The data acquisition unit is used to monitor the current temperature inside the cabin as well as the current temperature and humidity outside the cabin.

[0007] The temperature control unit has a cold air / hot air output function, which delivers cold air / hot air into the cabin to make the current temperature reach the target temperature setting.

[0008] The control unit includes a module for calculating the output of cold / hot airflow and an execution module for controlling the operation of the temperature regulation unit.

[0009] The calculation module employs a closed-loop control algorithm to precisely regulate the output of cold / hot airflow. Through the coordinated action of proportional, integral, and derivative components, it dynamically compensates for the deviation between the current temperature and the target temperature, thereby achieving sensitivity and precision in temperature regulation.

[0010] In a preferred embodiment of the temperature control system for wind turbine nacelles described in this invention: the temperature regulation unit includes an air supply component, a conversion component, and a regulation component.

[0011] In a preferred embodiment of the temperature control system for a wind turbine nacelle according to the present invention: the air supply assembly is used to supply compressed air to the conversion assembly;

[0012] The conversion component is used to convert compressed air into a cold / hot airflow.

[0013] The regulating component is used to distribute cold / hot airflow to the cabin or outside the cabin.

[0014] In a preferred embodiment of the temperature control system for wind turbine nacelles described in this invention: the air supply component is an air compressor with a compressed air pressure of 0.8-1.0 MPa.

[0015] In a preferred embodiment of the temperature control system for wind turbine nacelles described in this invention: the conversion component adopts a vortex tube, and the air inlet end of the vortex tube is provided with a nozzle, which is connected to the air outlet end of the air compressor to accelerate the compressed air and introduce it into the vortex tube.

[0016] In a preferred embodiment of the temperature control system for a wind turbine nacelle described in this invention: the closed-loop control algorithm includes...

[0017] Proportional control: Based on the error between the current temperature and the target temperature, it provides a linearly amplified control signal. In the initial stage of temperature adjustment, when the error is large, it can respond quickly and provide a larger control signal to accelerate the temperature to approach the target temperature value.

[0018] Integral stage: Accumulates historical errors to eliminate steady-state errors and ensure that the current temperature can accurately reach the target temperature value. Through continuous adjustment, it can eliminate the errors left by the proportional stage and stabilize the current temperature at the target temperature value.

[0019] Differential stage: Based on the rate of temperature change, predict future trends and adjust the control signal in advance to suppress overshoot and oscillation. Based on the current rate of temperature change, adjust the heating or cooling power in advance to avoid temperature overshoot or drastic fluctuations.

[0020] In a preferred embodiment of the temperature control system for wind turbine nacelles described in this invention: the target temperature is set according to the season and the equipment operating status.

[0021] T target =T ambient +ΔT

[0022] In the formula: T ambient ΔT represents the ambient temperature outside the cabin, and ΔT is the temperature adjustment amount set according to the season and equipment operating status.

[0023] In a preferred embodiment of the temperature control system for wind turbine nacelles described in this invention: the output signal of the execution module is:

[0024]

[0025] In the formula: e(t) is the error between the target temperature and the current temperature, K P (t) represents the real-time value of the proportional coefficient, K i (t) represents the real-time value of the integral coefficient. The error integral, accumulated from the start of control to the current time, reflects the cumulative effect of error over time; K d (t) represents the real-time value of the differential coefficient. denoted as the rate of change of the error.

[0026] In a preferred embodiment of the temperature control system for wind turbine nacelles described in this invention: the real-time values ​​of the proportional coefficient, integral coefficient, and derivative coefficient are dynamically adjusted by a calculation module, and the specific adjustment formula is as follows:

[0027] K p (t)=K p0 +α·f(T ambient H ambient )

[0028] K i (t)=K i0 +β·f(T ambient H ambient )

[0029] K d (t)=K d0 +γ·f(T ambient, H ambient )

[0030] Where: K p0 K i0 K d0 These are the initial parameters for the proportional coefficient, and α, β, and γ are adjustment coefficients used to control the speed and magnitude of parameter adjustment. f(T) ambient H ambient ) is a function that calculates the adjustment amount based on the external ambient temperature and humidity.

[0031] In a preferred embodiment of the temperature control system for wind turbine nacelles described in this invention: the air compressor is equipped with an air filter at its inlet end, and a drying cylinder is connected between the air compressor and the vortex tube.

[0032] The beneficial effects of this invention are as follows: This invention adopts a closed-loop control algorithm and a precise airflow channel design, which significantly improves the adjustment sensitivity and control accuracy of the wind turbine nacelle temperature control system, optimizes the airflow path, and enhances the condensation and removal efficiency of water vapor; in addition, the dynamically adjusted proportional, integral and derivative coefficients enable the system to adapt to different environmental conditions, ensuring the stability and reliability of temperature regulation. Attached Figure Description

[0033] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments of the present invention will be briefly described below. Obviously, the drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention. Wherein:

[0034] Figure 1 A framework diagram of a temperature control system for a wind turbine nacelle is shown.

[0035] Figure 2 A three-dimensional structural diagram of a drying cylinder used in a temperature control system for a wind turbine nacelle is shown.

[0036] Figure 3 A cross-sectional view of a drying cylinder used in a temperature control system for a wind turbine nacelle is shown.

[0037] Figure 4 It shows Figure 3 Enlarged structural diagram at point A in the middle. Detailed Implementation

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

[0039] The terminology used in this invention is that which is currently widely used in the art in consideration of the function of the invention; however, these terms may vary according to the intent of those skilled in the art, precedent, or new technology in the art. Furthermore, specific terms may be chosen by the applicant, and in such cases, their detailed meanings will be described in the detailed description of the invention. Therefore, the terms used in this specification should not be construed as simple names, but rather based on their meanings and the overall description of the invention.

[0040] Reference Figure 1 This embodiment provides a temperature control system for a wind turbine nacelle, including,

[0041] The data acquisition unit is used to monitor the current temperature inside the cabin as well as the current temperature and humidity outside the cabin.

[0042] The temperature control unit has a cold air / hot air output function, which delivers cold air / hot air into the cabin to make the current temperature reach the target temperature setting.

[0043] The control unit includes a module for calculating the output of cold / hot airflow and an execution module for controlling the operation of the temperature regulation unit.

[0044] The accounting module adopts a closed-loop control algorithm to precisely regulate the output of cold / hot airflow. Through the coordinated action of proportional, integral, and derivative components, it dynamically compensates for the deviation between the current temperature and the target temperature, thereby achieving sensitivity and precision in temperature regulation.

[0045] The temperature control unit includes an air supply component, a conversion component, and a control component, with a compressed air pressure of 0.8-1.0 MPa;

[0046] The air supply unit uses an air compressor to supply compressed air to the conversion unit;

[0047] The conversion assembly uses a vortex tube to convert compressed air into cold / hot airflow. The inlet end of the vortex tube is equipped with a nozzle, which is connected to the outlet end of the air compressor to accelerate the compressed air and introduce it into the vortex tube. Both the cold and hot ends of the vortex tube are connected to a main delivery pipe, and the outlet end of the main delivery pipe is connected to two branch pipes. The two branch pipes discharge airflow into / outside the engine compartment, respectively.

[0048] The regulating assembly is used to distribute cold / hot airflow to or from the cabin. It includes a flow meter and a shut-off valve. The flow meter is installed on the main delivery pipe, and the shut-off valve is installed on each branch pipe. The flow meter is used to control the delivery volume, and the shut-off valve is used to control the flow on and off and to regulate the flow rate by controlling the degree of opening and closing.

[0049] Closed-loop control algorithms include,

[0050] Proportional control: Based on the error between the current temperature and the target temperature, it provides a linearly amplified control signal. In the initial stage of temperature adjustment, when the error is large, it can respond quickly and provide a larger control signal to accelerate the temperature to approach the target temperature value.

[0051] Integral stage: Accumulates historical errors to eliminate steady-state errors and ensure that the current temperature can accurately reach the target temperature value. Through continuous adjustment, it can eliminate the errors left by the proportional stage and stabilize the current temperature at the target temperature value.

[0052] Differential stage: Based on the rate of temperature change, predict future trends and adjust the control signal in advance to suppress overshoot and oscillation. Based on the current rate of temperature change, adjust the heating or cooling power in advance to avoid temperature overshoot or drastic fluctuations.

[0053] The target temperature is set according to the season and the equipment's operating status:

[0054] T target =T ambient +ΔT

[0055] In the formula: T ambient ΔT represents the ambient temperature outside the cabin, and ΔT is the temperature adjustment amount set according to the season and equipment operating status.

[0056] The output signal of the execution module is:

[0057]

[0058] In the formula: e(t) is the error between the target temperature and the current temperature, K P (t) represents the real-time value of the proportional coefficient, K i (t) represents the real-time value of the integral coefficient. The error integral, accumulated from the start of control to the current time, reflects the cumulative effect of error over time; K d (t) represents the real-time value of the differential coefficient. denoted as the rate of change of the error.

[0059] The real-time values ​​of the proportional coefficient, integral coefficient, and derivative coefficient are dynamically adjusted through the accounting module. The specific adjustment formulas are as follows:

[0060] K p (t)=K p0 +α·f(T ambient H ambient )

[0061] K i (t)=K i0 +β·f(T ambient H ambient )

[0062] K d (t)=K d0 +γ·f(T ambient, H ambient )

[0063] Where: K p0 K i0 K d0 These are the initial parameters for the proportional coefficient, and α, β, and γ are adjustment coefficients used to control the speed and magnitude of parameter adjustment. f(T) ambient H ambient () is a function;

[0064]

[0065] In the formula: Tref For reference ambient temperature, T range For temperature adjustment range, H ref For reference, ambient humidity, H range Humidity adjustment range;

[0066] f(T ambient H ambient The adjustment amount is calculated based on the external ambient temperature and humidity, thus providing effective parameters for dynamic regulation.

[0067] Assuming the reference ambient temperature is 25℃, the temperature adjustment range is 10℃, the reference ambient humidity is 50%, and the humidity adjustment range is 20%, then the adjustment formula can be expressed as:

[0068]

[0069] If the ambient temperature outside the cabin is T ambient Above the ambient reference temperature T ref ,but A positive value leads to K p (t), K i (t) and K d Increasing (t) makes the system respond to temperature changes more quickly, which helps to reduce the temperature rapidly;

[0070] If the ambient temperature outside the cabin is T ambient Below the ambient reference temperature T ref ,but A negative value results in K p (t), K i (t) and K d Decreasing (t) makes the system's response to temperature changes more moderate, which helps to avoid overheating;

[0071] If the external ambient humidity H outside the cabin ambient Higher than reference humidity H ref ,but If K is positive, further increase it. p (t), K i (t) and K d (t) helps the system to more actively regulate temperature in high humidity environments to prevent the influence of humidity on temperature control;

[0072] If the external ambient humidity H outside the cabin ambient Below reference humidity H ref ,but If the value is negative, further decrease K. p (t), K i (t) and K d(t) helps the system regulate temperature more gently in low humidity environments to avoid over-regulation;

[0073] By controlling the external ambient temperature T ambient and external environmental humidity H ambient The dynamic adjustment formula incorporated into the closed-loop algorithm can better adapt to different environmental conditions, thereby improving the stability and effectiveness of the algorithm and ensuring the accuracy and reliability of temperature regulation.

[0074] As an optional embodiment:

[0075] Reference Figure 2-4 In one embodiment provided in this application, the air compressor is equipped with an air filter at the air inlet end, and a drying cylinder is connected between the air compressor and the vortex tube.

[0076] Specifically, the drying chamber includes a housing 1, which is equipped with an air inlet 2, an air outlet 3, and a drain hole 4. The air inlet 2 is connected to the air outlet of the air compressor and is used to deliver the compressed air to the housing 1. A water vapor removal device 5 is provided inside the housing 1 near the upper end. The gas entering the housing 1 moves from bottom to top and passes through the water vapor removal device 5 during the upward process to achieve water vapor separation. Water molecules are adsorbed on the water vapor removal device 5, while the separated dry gas continues to rise and enters the vortex tube from the air outlet 3.

[0077] Water molecules adsorbed on the water vapor removal unit 5 will gather into water droplets as the filtration volume increases. The water droplets will fall freely under their own weight and fall to the bottom of the box 1.

[0078] An automatic discharge component 6 is installed inside the tank 1 at the location of the drain hole 4. The automatic discharge component 6 automatically discharges water according to the depth of the water, without the need for manual operation.

[0079] The moisture removal component 5 includes several triangular plates 51 and 52. The length direction of the triangular plates 51 is parallel to the X-axis, matching the internal width of the housing 1, and the arrangement direction of the triangular plates 51 is parallel to the Y-axis. A gap is left between the endpoints of two adjacent triangular plates 51. The triangular plates 52 are located below the two adjacent triangular plates 51, and the vertex of the triangular plates 52 is located in the gap. The two long sides of the triangular plates 52 and the two endpoints of the two adjacent triangular plates 51 form an airflow channel 53. The airflow from bottom to top will impact the interior of the triangular plates 52 and enter the interior of the triangular plates 51 through the gap between the two adjacent triangular plates 52. Due to the triangular plates 51 and 52 All are right-angled structures, so the rising airflow will collide with the right-angled area of ​​triangle 51 and triangle 52. At this time, the collided airflow will bounce and move downward. The downward airflow will rise again under the action of the rising airflow, either colliding with the right-angled blocking area of ​​triangle 51 and triangle 52 again, or passing through the airflow channel 53. Since it needs to go through multiple collisions when entering the airflow channel 53, the water molecules contained in the airflow will be adsorbed on the inner wall of the right-angled blocking area when it collides with the right-angled blocking area. As the number of collisions increases, the number of adsorbed water molecules will increase, and then gather into water droplets. The water droplets have weight, so they will slide freely along the inner wall of the right-angled blocking area and fall to the bottom of the box 1.

[0080] This structure optimizes the airflow path. Through the precise arrangement of triangle 1 51 and triangle 2 52, an effective airflow channel 53 is formed, thereby improving the efficiency and performance of the water vapor removal component 5. The staggered arrangement of triangle 1 51 and triangle 2 52 helps to guide the airflow and increase the airflow disturbance to promote the condensation and removal of water vapor.

[0081] The automatic discharge component 6 includes a rotating seat 61, which is fixedly installed inside the housing 1 and above the drain hole 4. A rotating shaft 62 is rotatably connected to the inner side of the rotating seat 61. A sealing plate 63 that fits into the drain hole 4 is fixed to the bottom of the rotating shaft 62, and a hollow rod 63 that tilts downward is fixed to one side of the rotating shaft 62. A float 64 is fixed to one end of the hollow rod 63. In its natural state, the float 64 fits into the bottom of the housing 1. At this time, the sealing plate 63 is in close contact with the drain hole 4, thereby playing a sealing role and preventing water and gas from being discharged. As more water droplets are removed, the liquid level will rise. The rising liquid level will cause the float 64 to rise. After the float 64 rises, it drives the rotating shaft 62 to rotate, which in turn drives the sealing plate 63 to rotate. At this time, water will be discharged from the drain hole 4. After the water is discharged, the liquid level drops, and the float 64 falls until the sealing plate 63 seals the drain hole 4. This structure can realize automatic drainage without manual control, reducing labor intensity.

[0082] Finally, it should be noted that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways as long as they do not depart from the scope of the present invention.

Claims

1. A temperature control system for a wind turbine nacelle, characterized in that: include, The data acquisition unit is used to monitor the current temperature inside the cabin as well as the current temperature and humidity outside the cabin. The temperature control unit has a cold air / hot air output function, which delivers cold air / hot air into the cabin to make the current temperature reach the target temperature setting. The control unit includes a module for calculating the output of cold / hot airflow and an execution module for controlling the operation of the temperature regulation unit. The calculation module employs a closed-loop control algorithm to precisely regulate the output of cold / hot airflow. Through the coordinated action of proportional, integral, and derivative parameters, it dynamically compensates for the deviation between the current temperature and the target temperature, thereby achieving sensitivity and precision in temperature regulation.

2. The temperature control system for wind turbine nacelles according to claim 1, characterized in that: The temperature regulation unit includes a gas supply component, a conversion component, and a regulation component.

3. The temperature control system for wind turbine nacelles according to claim 2, characterized in that: The air supply assembly is used to supply compressed air to the conversion assembly; The conversion component is used to convert compressed air into a cold / hot airflow. The regulating component is used to distribute cold / hot airflow to the cabin or outside the cabin.

4. The temperature control system for wind turbine nacelles according to claim 3, characterized in that: The air supply component uses an air compressor with a compressed air pressure of 0.8-1.0 MPa.

5. The temperature control system for a wind turbine nacelle according to claim 4, characterized in that: The conversion component uses a vortex tube, and the air inlet end of the vortex tube is equipped with a nozzle. The nozzle is connected to the air outlet end of the air compressor to accelerate the compressed air and introduce it into the vortex tube.

6. The temperature control system for a wind turbine nacelle according to claim 5, characterized in that: The closed-loop control algorithm includes, Proportional control: Based on the error between the current temperature and the target temperature, it provides a linearly amplified control signal. In the initial stage of temperature adjustment, when the error is large, it can respond quickly and provide a larger control signal to accelerate the temperature to approach the target temperature value. Integral stage: Accumulates historical errors to eliminate steady-state errors and ensure that the current temperature can accurately reach the target temperature value. Through continuous adjustment, it can eliminate the errors left by the proportional stage and stabilize the current temperature at the target temperature value. Differential stage: Based on the rate of temperature change, predict future trends and adjust the control signal in advance to suppress overshoot and oscillation. Based on the current rate of temperature change, adjust the heating or cooling power in advance to avoid temperature overshoot or drastic fluctuations.

7. The temperature control system for a wind turbine nacelle according to claim 6, characterized in that: The target temperature is set according to the season and the equipment's operating status. T target =T ambient +ΔT In the formula: T ambient ΔT represents the ambient temperature outside the cabin, and ΔT is the temperature adjustment amount set according to the season and equipment operating status.

8. The temperature control system for a wind turbine nacelle according to claim 7, characterized in that: The output signal of the execution module is: In the formula: e(t) is the error between the target temperature and the current temperature, K P (t) represents the real-time value of the proportional coefficient, K i (t) represents the real-time value of the integral coefficient. The error integral, accumulated from the start of control to the current time, reflects the cumulative effect of error over time; K d (t) represents the real-time value of the differential coefficient. denoted as the rate of change of the error.

9. The temperature control system for a wind turbine nacelle according to claim 8, characterized in that: The real-time values ​​of the proportional coefficient, integral coefficient, and derivative coefficient are dynamically adjusted through the accounting module. The specific adjustment formula is as follows: K p (t)=K p0 +α·f(T ambient ,H ambient ) K i (t)=K i0 +β·f(T ambient ,H ambient ) K d (t)=K d0 +γ·f(T ambient, H ambient ) Where: K p0 K i0 K d0 These are the initial parameters for the proportional coefficient, and α, β, and γ are adjustment coefficients used to control the speed and magnitude of parameter adjustment. f(T) ambient H ambient ) is a function that calculates the adjustment amount based on the external ambient temperature and humidity.

10. The temperature control system for a wind turbine nacelle according to claim 9, characterized in that: The air compressor is equipped with an air filter at the air inlet end, and a drying cylinder is connected between the air compressor and the vortex tube.

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