Cooling device for electrical components of wind generating set and control method of cooling device

Abstract

The invention provides a wind generating set electrical component cooling device and a control method thereof, and belongs to the field of wind power generation. The device comprises a cabin cover, an electrical component located in the cabin cover, an isolation chamber forming an independent space with an air inlet and an air outlet of the electrical component, refrigeration equipment and a maintenance door. The isolation chamber is composed of a cabin cover and isolation plates arranged on the left side, the right side and the upper side of an air inlet and an air outlet of the electrical component respectively. An opening is formed in the cabin cover side in the isolation chamber, and the refrigeration equipment is fixedly mounted at the opening; and the maintenance door is arranged on a left isolation plate of the isolation chamber. Under the condition that the overall structure of the unit is not changed, the fault rate is reduced and the service life of components is prolonged by changing the operating environment temperature of the electrical components.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation, and in particular to a cooling device, a control method, a terminal and a medium for electrical components of a wind power generator set. Background Art

[0002] Early wind turbines were limited by the technology at the time. The flow field motion could not be accurately simulated during the design process, and even the local temperature was not calculated, resulting in excessively high temperatures in the cabin or tower. Electrical components such as converters and control cabinets operated in a high temperature environment, resulting in frequent over-temperature failures in summer and autumn, shortening the life of electrical components and requiring frequent replacement. Frequent replacement of electrical components and frequent failures caused heavy power generation losses.

[0003] In summary, how to ensure that the overall structure of the unit remains unchanged while changing the operating environment temperature of electrical components to reduce the failure rate and extend the service life of components is a technical problem that urgently needs to be solved.

[0004] In the early design stage of wind turbines, due to the limitations of the technical level and computing power at the time, it was difficult for designers to accurately simulate the flow field movement of wind turbines during operation, and there were also obvious deficiencies in the calculation of the local temperature inside the nacelle or tower. This design limitation led to a significant problem: the temperature in some local spaces of the nacelle or tower would rise abnormally, especially in summer and autumn when the ambient temperature is already high. This problem is particularly prominent.

[0005] These local high temperature environments pose a severe challenge to the electrical components in wind turbines, such as converters and control cabinets. When electrical components operate in a high temperature environment, their performance will be affected and the failure rate will increase significantly. For example, as one of the core components of a wind turbine, the converter's working efficiency and stability will be greatly reduced at high temperatures, thereby increasing the risk of failure. Similarly, the electrical components in the control cabinet will also age faster due to excessive temperatures, shortening their service life.

[0006] Frequent failure and replacement of electrical components not only increase the operation and maintenance costs of wind farms, but more importantly, cause a large amount of power generation loss due to the need to shut down the units for maintenance. For wind farms, this power generation loss is unbearable and seriously affects their economic benefits and sustainable development capabilities.

[0007] Therefore, how to reduce the failure rate and extend the service life of components by changing the operating environment temperature of electrical components while ensuring that the overall structure of the wind turbine remains unchanged has become a technical problem that urgently needs to be solved. Summary of the invention

[0008] In view of the deficiencies in the prior art, the present invention proposes a cooling device for electrical components of a wind turbine generator set, a control method, a terminal and a medium to solve the technical problems in the prior art.

[0009] The technical solution adopted by the present invention is:

[0010] In a first aspect of the present embodiment, a cooling device for electrical components of a wind turbine generator set is provided, the device comprising: a nacelle cover, electrical components located in the nacelle cover, an isolation chamber forming an independent space with air inlets and outlets of the electrical components, a refrigeration device, and a maintenance door;

[0011] The isolation chamber is composed of a nacelle cover and isolation plates respectively arranged on the left side, right side and upper side of the air inlet and outlet of the electrical component;

[0012] An opening is provided on the side of the nacelle cover in the isolation chamber, and the refrigeration equipment is fixedly installed at the opening;

[0013] The maintenance door is arranged on the left isolation plate of the isolation chamber.

[0014] Furthermore, the refrigeration equipment is compressor refrigeration or refrigeration medium refrigeration with an evaporator system.

[0015] Furthermore, the electrical component is any one or more of a converter, a control cabinet or a box transformer.

[0016] Furthermore, the refrigeration equipment meets the refrigeration requirements of the electrical components under the most unfavorable environmental conditions.

[0017] In a second aspect of this embodiment, a method for controlling air conditioning and refrigeration of a wind turbine generator set is provided, the method comprising:

[0018] Obtaining working status information of electrical components;

[0019] Determine whether the electrical component fails and whether the unit falls off based on the working status information of the electrical component;

[0020] If there is an electrical component failure or unit detachment, stop the operation of the electrical components and refrigeration equipment;

[0021] If there is no electrical component failure or unit shedding, obtain the temperature in the isolation room where the electrical components are located;

[0022] When the temperature in the isolation chamber is greater than or equal to a first preset temperature, the refrigeration device is triggered to cool the isolation chamber until the temperature of the preset isolation chamber is less than or equal to a second preset temperature, at which time the refrigeration device operates.

[0023] Furthermore, the first preset temperature is 40°C, and the second preset temperature is 38°C.

[0024] Furthermore, the method also includes stopping the operation of the refrigeration equipment when the operation time of the refrigeration equipment is greater than or equal to a preset time.

[0025] In a third aspect of this embodiment, a terminal is provided, comprising a processor, an input device, an output device and a memory, wherein the processor, the input device, the output device and the memory are interconnected, wherein the memory is used to store a computer program, the computer program comprises program instructions, and the processor is configured to call the program instructions to execute any method described in the second aspect of this embodiment.

[0026] In a fourth aspect of this embodiment, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores a computer program, wherein the computer program includes program instructions, and when the program instructions are executed by a processor, the processor executes a method as described in any one of the second aspects of this embodiment.

[0027] It can be seen from the above technical solution that the beneficial technical effects of the present invention are as follows:

[0028] 1. The present invention reduces the failure rate of electrical components such as converters and control cabinets and extends their service life by changing the operating environment temperature of electrical components while ensuring that the overall structure of the unit remains unchanged, thereby ultimately increasing power generation and reducing the cost of replacing components. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0030] Figure 1 This is a schematic structural diagram of a cooling device for electrical components of a wind turbine generator set according to an embodiment of the present invention;

[0031] Figure 2 This is a flow chart of a method according to an embodiment of the present invention;

[0032] Figure 3 Schematic diagram of a terminal according to an embodiment of the present invention.

[0033] Reference numerals:

[0034] 1-nacelle cover, 2-isolation panel, 3-maintenance door, 4-converter, 5-refrigeration equipment, 6-isolation room. DETAILED DESCRIPTION

[0035] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

[0036] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the present invention belongs.

[0037] Example 1

[0038] This embodiment provides a cooling device for electrical components of a wind turbine generator set, such as Figure 1 As shown. It aims to reduce the failure rate and extend the service life of components by changing the operating environment temperature of electrical components. The specific structure of the device is as follows:

[0039] The device comprises: a nacelle cover 1, electrical components located in the nacelle cover 1, an isolation chamber 6 forming an independent space with the air inlet and outlet of the electrical components, a refrigeration device 5 and a maintenance door 3;

[0040] The isolation chamber 6 is composed of a nacelle cover 1 and isolation plates 2 respectively arranged on the left, right and upper sides of the air inlet and outlet of the electrical components;

[0041] An opening is provided on the side of the nacelle cover 1 in the isolation chamber 6, and the refrigeration equipment 5 is fixedly installed at the opening;

[0042] The maintenance door 3 is arranged on the left isolation plate or the right isolation plate of the isolation chamber 6 .

[0043] Specifically, the nacelle cover 1, as the main outer shell part of the wind turbine, provides basic protection for electrical components.

[0044] In this embodiment, the electrical component specifically refers to the converter 4, but it is also applicable to other key electrical components such as a control cabinet or a box transformer. These electrical components are installed in the nacelle cover 1 and are responsible for converting mechanical energy into electrical energy or performing other necessary electrical control.

[0045] In order to create an independent cooling space, isolation panels 2 are provided at the air inlet and outlet of the electrical components. These isolation panels 2 are respectively located on the left, right and upper sides of the electrical components, and together with the nacelle cover 1, form a closed isolation chamber 6. In this way, the heat generated by the converter 4 during operation is confined in the isolation chamber 6, which is convenient for subsequent cooling treatment.

[0046] Refrigeration equipment 5, in order to reduce the temperature in the isolation chamber 6, the external circulation air inlet and outlet of the refrigeration equipment 5 are designed according to the size of the cabin cover 1 part inside the isolation chamber 6, the air outlet is cut to ensure that the external circulation of the refrigeration equipment 5 is unobstructed, and the refrigeration equipment 5 is fixedly installed at the opening. In this embodiment, the refrigeration equipment is a compressor refrigeration, and the refrigeration equipment 5 can continuously blow cold air into the isolation chamber 6 and discharge hot air from the air outlet of the electrical components, thereby taking away the heat generated by the electrical components.

[0047] Maintenance door 3, in order to facilitate the inspection and maintenance of electrical components, a maintenance door 3 is provided on the left side of the isolation chamber 6. When it is necessary to enter the isolation chamber 6, only this door needs to be opened.

[0048] Example 2: Selection of refrigeration equipment

[0049] Refrigeration equipment selection method:

[0050] 1. Calculate the local heat balance of electrical components and clarify the cooling power;

[0051] (1) Determine the calculation basis and parameters:

[0052] Calculation basis: Calculated according to the most unfavorable environmental conditions, for example, the cabin ambient dry bulb temperature is 45°C;

[0053] Heating component parameters: The heating power of the converter is 12KW;

[0054] Air enthalpy value: the most unfavorable local air environment parameter of the converter h1 = 46.79 kJ / kg, 60°C air enthalpy h2 = 63.56 kJ / kg;

[0055] Temperature difference setting: The temperature difference between the inlet and outlet air is calculated as ΔT = 15°C;

[0056] Air density: ρ = 1.12 kg / m 3

[0057] Redundancy factor: The redundancy is usually considered at 1.3 times.

[0058] (2) Calculate the theoretical air demand:

[0059] Enthalpy difference calculation: Δh = h2-h1 = 63.56 kJ / kg-46.79 kJ / kg = 16.77 kJ / kg

[0060] Theoretical air flow:

[0061]

[0062] Air flow after considering the margin:

[0063] Q actual=Q×1.3=2290m 3 / h×1.3=2977m 3 / h(Round to the nearest integer, write as 3000m 3 / h for selection).

[0064] (3) Preliminary selection of air conditioning cooling capacity

[0065] The preliminary design of the refrigeration equipment (air conditioner) cooling capacity: if 2 units, each 3kW, the total cooling capacity is 6kW.

[0066] (4) Verify the cooling effect

[0067] Calculate the calorific value of the inhaled air without air conditioning:

[0068]

[0069] Calculate the calorific value of the air inhaled after air conditioning:

[0070] Q2 = Q1-cooling capacity = 34.8kW-6kW = 28.8kW

[0071] Air enthalpy after inverse calculation transformation:

[0072]

[0073] Calculate the suction temperature: Use the air enthalpy table or formula to reverse the calculation and get the suction temperature to be approximately 37.2°C.

[0074] (5) Considering airflow mixing and interference in practical applications

[0075] The above is the result calculated based on the IGBT ventilation and heat dissipation with a certain margin, and the relative ideal state. The air inlet temperature drops by about 8 degrees Celsius. In actual applications, the IGBT module ventilation duct cannot be effectively isolated, so air flow mixing and interference are involved. The actual design ventilation volume of the entire converter cabinet environment reaches more than 5000m 3 / h ventilation volume.

[0076] Actual intake ambient air temperature:

[0077] According to the estimated effect after mixing, such as

[0078] (6) Conclusion and selection confirmation

[0079] Conclusion: It is verified that installing two 3kW cooling devices is theoretically sufficient to meet the demand.

[0080] Final selection: Choose two refrigeration units with 3kW each or equivalent total cooling capacity.

[0081] 2. Select the size and installation method of the refrigeration equipment according to the space where the electrical components are located;

[0082] The compatibility between the electrical structure and the unit of the refrigeration equipment mainly refers to the fact that the communication protocols between the equipment do not conflict, the power supply voltage and protection devices meet the requirements, and the weak-current wiring interfaces remain consistent.

[0083] In summary, we choose two 3kW compressors as the main cooling means, which have the advantages of high cooling efficiency and good stability, and the cooling setting determined in this embodiment can meet the cooling requirements of electrical components under the most unfavorable environmental conditions. In other words, even in an extremely high temperature environment, this refrigeration equipment can ensure that the electrical components can operate stably at a suitable temperature.

[0084] Embodiment 3: Wind turbine air conditioning refrigeration control method, such as Figure 2 As shown;

[0085] In order to further improve the efficiency and stability of the cooling device, we also designed a wind turbine air conditioning refrigeration control method. The specific steps of this method are as follows:

[0086] Obtaining the working status information of electrical components: Using sensors and other monitoring methods, the working status information of electrical components, including current, voltage, temperature, etc., can be obtained in real time.

[0087] Determine whether electrical components are faulty or the unit is detached: Based on the acquired working status information, determine whether electrical components are faulty or the unit is detached. If these problems exist, immediately stop the operation of the electrical components and the refrigeration equipment to avoid further damage.

[0088] Obtain the temperature of the isolation chamber: If the electrical components and the unit are in normal condition, the temperature in the isolation chamber is obtained through the temperature sensor.

[0089] Triggering the refrigeration equipment to run: When the temperature in the isolation room is greater than or equal to the first preset temperature (for example, 40°C), the refrigeration equipment is triggered to start running to cool down the isolation room. When the temperature of the isolation room drops to less than or equal to the second preset temperature (for example, 38°C), the refrigeration equipment stops running.

[0090] Protect the refrigeration equipment: In order to prevent the refrigeration equipment from overheating or damage due to long-term operation, we have also set a preset time. When the operation time of the refrigeration equipment is greater than or equal to this preset time (for example, 48 hours), the refrigeration equipment will automatically stop running regardless of the temperature of the isolation room.

[0091] Through the description of the above embodiments, we can see that the wind turbine electrical component cooling device and control method of the present invention can effectively reduce the operating environment temperature of the electrical components, thereby reducing the failure rate and extending the service life of the components. This is of great significance for improving the overall performance and reliability of the wind turbine.

[0092] like Figure 3 As shown, an embodiment of the present application also provides a terminal, including a processor, an input device, an output device and a memory, wherein the processor, input device, output device and memory are interconnected, wherein the memory is used to store a computer program, and the computer program includes program instructions, and the processor is configured to call the program instructions to execute part or all of the steps described in a method for controlling air conditioning and refrigeration of a wind turbine set in an embodiment of the present application.

[0093] An embodiment of the present application also provides a computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program, and the computer program includes program instructions. When the program instructions are executed by a processor, the processor executes part or all of the steps described in a wind turbine air conditioning and refrigeration control method in an embodiment of the present application.

[0094] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A cooling device for electrical components of a wind turbine generator set, characterized in that: The device comprises: a nacelle cover, an electrical component located in the nacelle cover, an isolation chamber forming an independent space with the air inlet and outlet of the electrical component, a refrigeration device and a maintenance door; The isolation chamber is composed of a nacelle cover and isolation plates respectively arranged on the left side, right side and upper side of the air inlet and outlet of the electrical component; An opening is provided on the side of the nacelle cover in the isolation chamber, and the refrigeration equipment is fixedly installed at the opening; The maintenance door is arranged on the left isolation plate of the isolation chamber.

2. A cooling device for electrical components of a wind turbine generator set according to claim 1, characterized in that: The refrigeration equipment is compressor refrigeration or refrigeration medium refrigeration with an evaporator system.

3. A cooling device for electrical components of a wind turbine generator set according to claim 1, characterized in that: The electrical component is any one or more of a converter, a control cabinet or a box transformer.

4. A wind turbine electrical component cooling device according to claim 1, characterized in that: The refrigeration equipment meets the refrigeration requirements of the electrical components under the most unfavorable environmental conditions.

5. A wind turbine air conditioning refrigeration control method, characterized in that: Using the wind turbine electrical component cooling device according to any one of claims 1 to 4, the method comprises: Obtaining working status information of electrical components; Determine whether the electrical component fails and whether the unit falls off based on the working status information of the electrical component; If there is an electrical component failure or unit detachment, stop the operation of the electrical components and refrigeration equipment; If there is no electrical component failure or unit shedding, obtain the temperature in the isolation room where the electrical components are located; When the temperature in the isolation chamber is greater than or equal to a first preset temperature, the refrigeration device is triggered to cool the isolation chamber until the temperature of the preset isolation chamber is less than or equal to a second preset temperature, at which time the refrigeration device operates.

6. A wind turbine air conditioning refrigeration control method according to claim 5, characterized in that: The first preset temperature is 40°C, and the second preset temperature is 38°C.

7. A wind turbine air conditioning refrigeration control method according to claim 5, characterized in that: The method further includes, when the operation time of the refrigeration equipment is greater than or equal to a preset time, stopping the operation of the refrigeration equipment.

8. A terminal, characterized in that: The method comprises a processor, an input device, an output device and a memory, wherein the processor, the input device, the output device and the memory are interconnected, wherein the memory is used to store a computer program, the computer program comprises program instructions, and the processor is configured to call the program instructions to execute the method according to any one of claims 5 to 7.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, wherein the computer program includes program instructions, and when the program instructions are executed by a processor, the processor is caused to perform the method according to any one of claims 5 to 7.

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