Power transformation device and offshore wind power station
By introducing blower components into the substation device of offshore wind power stations, the cold air of the low-pressure chamber is blown into the transformer chamber and the hot air is returned, the problem of insufficient utilization of cooling capacity in the prior art is solved, and better cooling effect and longer service life are achieved.
Patent Information
- Application Number
- CN202421398777.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-18
- Publication Date
- 2025-04-15
- Estimated Expiration
- 2034-06-18
AI Technical Summary
In the current substation device of offshore wind power stations, the heat generated by the transformer is higher than that of the low-voltage switch cabinet, resulting in excess of the cooling capacity of the first cooling module and insufficient cooling capacity of the second cooling module, and unable to fully utilize the cooling capacity.
A substation device is designed, including a substation, a first cooling module, a second cooling module and a blower assembly. The cooling capacity of both is fully utilized by the blowing assembly.
By fully utilizing the cooling capacity, the temperature of the transformer chamber is reduced, and the temperature of the low-voltage chamber is close to equilibrium, the cooling effect of the low-voltage chamber and the transformer chamber is improved, the service life of the substation is extended and the maintenance frequency is reduced.
Smart Images
Figure CN222763460U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of wind power generation, in particular to a power transformation device and an offshore wind power station. Background Art
[0002] Some existing offshore wind power stations are equipped with cabin-type substations, which include a substation cabin, a first cooling module, and a second cooling module. The substation cabin has a low-voltage room and a transformer room. The transformer room is equipped with a transformer, and the low-voltage room is equipped with a low-voltage switch cabinet. The transformer and the low-voltage switch cabinet will generate heat when working. The first cooling module cools the low-voltage room, and the second cooling module cools the transformer room. Usually, the heat generated by the transformer is higher than the heat generated by the low-voltage switch cabinet, so that the first cooling module has excess cooling capacity and the second cooling module has insufficient cooling capacity. Utility Model Content
[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a power conversion device that can fully utilize the refrigeration capacity of the first cooling module and the second cooling module.
[0004] The utility model also provides an offshore wind power station with the above-mentioned power transformation device.
[0005] According to the first embodiment of the utility model, the transformer device includes a transformer cabin, a first cooling module, a second cooling module and a blower assembly. The transformer cabin is provided with a low-pressure chamber, a transformer chamber and a return air duct, and the low-pressure chamber is connected to the transformer chamber through the return air duct; the first cooling module is provided in the transformer cabin and used to cool the low-pressure chamber; the second cooling module is provided in the transformer cabin and used to cool the transformer chamber; the blower assembly is provided in the transformer cabin, and the blower assembly is used to extract air from the low-pressure chamber and discharge it to the transformer chamber, or the blower assembly is used to extract air from the transformer chamber and discharge it to the low-pressure chamber.
[0006] The substation device according to the embodiment of the first aspect of the utility model has at least the following beneficial effects: when the substation is working, the first cooling module cools the low-pressure chamber, and the second cooling module cools the transformer chamber; when the blowing assembly is started, the cold air in the low-pressure chamber can be blown into the transformer chamber, and the hot air in the transformer chamber can be returned to the low-pressure chamber through the return air duct, thereby making full use of the cooling capacity of the first cooling module and the second cooling module, further reducing the temperature of the transformer chamber, so that the transformer chamber can be close to equilibrium with the temperature of the low-pressure chamber, and the cooling effect on both the low-pressure chamber and the transformer chamber is good.
[0007] According to some embodiments of the utility model, the substation cabin includes a cabin body and a partition, the cabin body is provided with a accommodating chamber, the partition is arranged in the cabin body and divides the accommodating chamber into the low-pressure chamber and the transformer chamber, the blower assembly includes a blower and an exhaust duct, the exhaust duct is passed through the partition, the exhaust duct is provided with an exhaust air duct, the low-pressure chamber is connected with the transformer chamber through the exhaust air duct, the blower is arranged in the exhaust duct and is used to form an airflow from the low-pressure chamber toward the transformer chamber in the exhaust air duct.
[0008] According to some embodiments of the utility model, a transformer is further included. The transformer is arranged in the transformer room. The transformer is provided with an indoor heat exchange part, and the indoor heat exchange part is located in the exhaust air duct.
[0009] According to some embodiments of the utility model, the exhaust duct is arranged at the upper end of the partition, and the return air duct is arranged at the lower end of the partition.
[0010] According to some embodiments of the present invention, the volume of the low-pressure chamber is smaller than the volume of the transformer chamber.
[0011] According to some embodiments of the utility model, the cabin body includes a bottom shell and a cover plate, the upper end of the bottom shell is provided with an opening, the cover plate is detachably provided above the bottom shell and covers the opening, and the bottom shell and the cover plate enclose to form the accommodating chamber.
[0012] According to some embodiments of the utility model, an oil-air cooler is further included, and the oil-air cooler is arranged outside the transformer compartment. The transformer is an oil-immersed transformer, and the transformer is connected to the oil-air cooler through a refrigerant pipeline.
[0013] According to some embodiments of the utility model, an oil storage chamber is provided at the bottom of the transformer compartment, a recovery hole is provided on the bottom wall of the transformer chamber, the oil storage chamber is located below the transformer chamber, the oil storage chamber is connected with the transformer chamber through the recovery hole, and an oil drain assembly is provided in the oil storage chamber.
[0014] According to some embodiments of the present invention, the first cooling module includes at least one integrated air conditioner, and the second cooling module includes at least one integrated air conditioner.
[0015] An offshore wind power station according to an embodiment of the second aspect of the utility model includes the above-mentioned power transformation device.
[0016] The offshore wind power station according to the embodiment of the second aspect of the utility model has at least the following beneficial effects: the service life of the offshore wind power station is longer and the maintenance frequency can be reduced.
[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:
[0019] Figure 1 A three-dimensional schematic diagram of a power conversion device according to an embodiment of the utility model;
[0020] Figure 2 It is a three-dimensional schematic diagram of a partial structure of a power conversion device according to an embodiment of the utility model;
[0021] Figure 3 This is a three-dimensional schematic diagram of the power transformation device according to an embodiment of the utility model when the cover is opened.
[0022] Reference numerals:
[0023] Transformer cabin 100, low-pressure chamber 101, transformer chamber 102, return air duct 103, recovery hole 104, cabin body 110, bottom shell 111, cover plate 112, partition plate 120;
[0024] A first cooling module 200;
[0025] A second cooling module 300;
[0026] Blowing assembly 400, exhaust duct 410;
[0027] Transformer 500;
[0028] Oil-air cooler 600;
[0029] Low voltage switchgear 700. DETAILED DESCRIPTION
[0030] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.
[0031] In the description of the present invention, it should be understood that the descriptions involving orientation, such as the orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0032] In the description of the present utility model, "a plurality" means more than two. If there is a description of "first" or "second", it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.
[0033] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.
[0034] Reference Figures 1 to 3 , is a substation device of an embodiment of the utility model, comprising a substation cabin 100, a first cooling module 200, a second cooling module 300 and a blower assembly 400. The substation cabin 100 is provided with a low-pressure chamber 101, a transformer chamber 102 and a return air duct 103, and the low-pressure chamber 101 is connected with the transformer chamber 102 through the return air duct 103; the first cooling module 200 is provided in the substation cabin 100 and used to cool the low-pressure chamber 101; the second cooling module 300 is provided in the substation cabin 100 and used to cool the transformer chamber 102; the blower assembly 400 is provided in the substation cabin 100, and the blower assembly 400 is used to extract air from the low-pressure chamber 101 and discharge it to the transformer chamber 102.
[0035] When the substation is working, the first cooling module 200 cools the low-pressure chamber 101, and the second cooling module 300 cools the transformer chamber 102; when the blowing assembly 400 is started, the cold air in the low-pressure chamber 101 can be blown into the transformer chamber 102, and the hot air in the transformer chamber 102 can be returned to the low-pressure chamber 101 through the return air duct 103, thereby making full use of the cooling capacity of the first cooling module 200 and the second cooling module 300, further reducing the temperature of the transformer chamber 102, so that the temperature of the transformer chamber 102 can be close to equilibrium with the low-pressure chamber 101, and the cooling effect on the low-pressure chamber 101 and the transformer chamber 102 is good.
[0036] It is understandable that, in other embodiments, the blower assembly 400 can also be used to extract air from the transformer chamber 102 and discharge it into the low-pressure chamber 101. Subsequently, the air in the low-pressure chamber 101 will flow into the transformer chamber 102 through the return air duct 103 under the action of pressure, and the temperatures of the transformer chamber 102 and the low-pressure chamber 101 can be close to equilibrium, thereby making full use of the cooling capacity of the first cooling module 200 and the second cooling module 300.
[0037] In the embodiment, the transformer compartment 100 includes a compartment body 110 and a partition 120, the compartment body 110 is provided with a containing room, the partition 120 is provided in the compartment body 110 and separates the containing room into a low-pressure room 101 and a transformer compartment 102, the air blowing assembly 400 includes a blower and an exhaust duct 410, the exhaust duct 410 is passed through the partition 120, the exhaust duct 410 is provided with an exhaust air duct, the low-pressure room 101 is connected with the transformer compartment 102 through the exhaust air duct, the blower is provided in the exhaust duct 410 and is used to form a wind flow from the low-pressure room 101 to the transformer compartment 102 in the exhaust air duct. The transformer compartment 100 described above has a compact structure, relatively good safety, and is relatively easy to manufacture, and can quickly blow the cold air of the low-pressure room 101 into the transformer compartment 102, which is conducive to the temperature of the transformer compartment 102 and the low-pressure room 101 being close to equilibrium.
[0038] It is conceivable that the blower assembly 400 can also be other structures. For example, an exhaust port is directly opened on the partition 120. The blower assembly 400 uses a blower, and the blower is arranged at the exhaust port to directly blow the air in the low-pressure chamber 101 into the transformer chamber 102 to achieve a similar function, making full use of the first cooling module 200 and the second cooling module 300, so that the temperature of the low-pressure chamber 101 and the transformer chamber 102 is relatively balanced.
[0039] In the embodiment, a transformer 500 is further included, and the transformer 500 is arranged in the transformer chamber 102. The transformer 500 is provided with an indoor heat exchange part, and the indoor heat exchange part is located in the exhaust air duct. When the transformer device is in a normal working state, the air temperature in the low-pressure chamber 101 is relatively low, and the blower blows the cold air in the low-pressure chamber 101 into the transformer chamber 102 through the exhaust air duct. The cold air can first contact the indoor heat exchange part, and directly air cool the transformer 500. There is a large temperature difference between the cold air and the indoor heat exchanger. Compared with the method in which the second cooling module 300 gradually cools the air temperature of the transformer chamber 102, the large temperature difference can dissipate heat from the indoor heat exchanger more quickly, thereby improving the cooling effect of the transformer 500.
[0040] It is understandable that, in other embodiments, the indoor heat exchange unit may also be located at other positions in the transformer chamber 102, and those skilled in the art may configure it specifically according to actual needs.
[0041] Specifically, the indoor heat dissipation part is a heat dissipation copper bar.
[0042] Specifically, a low-voltage switch cabinet 700 is disposed in the low-voltage room 101 .
[0043] In the embodiment, the exhaust duct 410 is arranged at the upper end of the partition 120, and the return air duct 103 is arranged at the lower end of the partition 120. The above structure facilitates the air in the low-pressure chamber 101 and the transformer chamber 102 to form a circulating wind flow, and the wind flow can circulate through most areas of the low-pressure chamber 101 and most areas of the transformer chamber 102, so that the temperature of the low-pressure chamber 101 and the transformer chamber 102 can be better balanced, and the overall cooling effect of the transformer chamber 102 is better.
[0044] It is conceivable that, in other embodiments, the exhaust duct 410 and the return air duct 103 may be located at other positions, for example, the exhaust duct 410 is located at the lower end of the partition 120, and the return air duct 103 is located at the upper end of the partition 120; or the exhaust duct 410 and the return air duct 103 are both located at the upper end of the partition 120; or the exhaust duct 410 and the return air duct 103 are both located at the lower end of the partition 120, etc., and those skilled in the art can make specific configurations according to actual needs.
[0045] Specifically, a return air duct is provided at the lower end of the partition 120, and the return air duct forms the return air duct 103. It is conceivable that a return air port can also be opened on the partition 120, and the return air port forms the return air duct 103.
[0046] It is understandable that the partition 120 may also be provided with a flow hole, a part of the flow hole forms the exhaust air duct, and another part of the flow hole forms the return air duct 103.
[0047] In the embodiment, the volume of the low-pressure chamber 101 is smaller than the volume of the transformer chamber 102. The above structure enables the first cooling module 200 to cool the air in the low-pressure chamber 101 better, accelerates the cooling speed of the air in the low-pressure chamber 101, and makes the air temperature lower when it is blown into the transformer chamber 102 through the first air outlet, and the temperature difference between the air and the indoor heat exchanger can be larger, thereby improving the cooling effect on the transformer 500.
[0048] In the embodiment, the cabin body 110 includes a bottom shell 111 and a cover plate 112. The upper end of the bottom shell 111 is provided with an opening. The cover plate 112 is detachably provided above the bottom shell 111 and covers the opening. The bottom shell 111 and the cover plate 112 enclose a storage chamber. In the above structure, when the cover plate 112 is disassembled, it is convenient to put the transformer 500, the low-voltage switch cabinet 700 and other equipment into or out of the transformer cabin 100, and it is convenient to replace and maintain the equipment inside the transformer cabin 100; when the cover plate 112 is installed on the bottom shell 111, the transformer cabin 100 can be used normally, and the low-voltage chamber 101 and the transformer chamber 102 are isolated from the exchange of air outside the transformer cabin 100, so as to prevent the corrosion of the equipment inside the low-voltage chamber 101 and the transformer chamber 102 by the external air.
[0049] Specifically, the opening periphery of the bottom shell 111 is convex upward, so that when rain drops on the transformer compartment 100 , the rain cannot flow through the opening of the bottom shell 111 into the inside of the transformer compartment 100 .
[0050] Specifically, the cover plate 112 is detachably mounted on the bottom shell 111 by screwing. It is conceivable that the cover plate 112 can also be detachably mounted on the bottom shell 111 by snapping or magnetic fixing.
[0051] In the embodiment, an oil-air cooler 600 is further included, and the oil-air cooler 600 is arranged outside the transformer compartment 100. The transformer 500 is an oil-immersed transformer 500, and the transformer 500 is connected to the oil-air cooler 600 through a refrigerant pipeline. Part of the heat generated by the transformer 500 is transported to the oil-air cooler 600 by the cooling oil through the refrigerant pipeline for heat dissipation, and the other part of the heat is dissipated through the first cooling module 200 and the second cooling module 300. The heat dissipation effect is relatively stable, and the air temperature of the transformer chamber 102 and the low-pressure chamber 101 is relatively reasonable.
[0052] In the embodiment, an oil storage chamber is provided at the bottom of the transformer compartment 100, a recovery hole 104 is provided at the bottom wall of the transformer chamber 102, the oil storage chamber is located below the transformer chamber 102, the oil storage chamber is connected to the transformer chamber 102 through the recovery hole 104, and an oil drain assembly is provided in the oil storage chamber. Since the transformer 500 is an oil-immersed transformer 500, a small amount of cooling oil will leak to the bottom wall of the transformer chamber 102 during use. In order to avoid environmental pollution caused by leakage of cooling oil, the recovery hole 104 and the oil storage chamber are provided, and the cooling oil on the bottom wall of the transformer chamber 102 can enter the oil storage chamber through the recovery hole 104 for recovery and storage. When the recovered cooling oil is large, the oil drain assembly can discharge the cooling oil in the oil storage chamber.
[0053] Specifically, the bottom wall of the transformer chamber 102 is provided with a plurality of recovery holes 104, which are mainly located below the oil-cooled transformer 500, so as to achieve a better recovery effect on the leaked cooling oil. The oil drain assembly is an oil drain hole and an oil drain valve, which is arranged at the oil drain hole. When the oil drain valve is opened, the cooling oil can be discharged from the oil storage chamber.
[0054] In the embodiment, the first cooling module 200 includes two integrated air conditioners, and the second cooling module 300 includes two integrated air conditioners. The first cooling module 200 includes two integrated air conditioners, which can have a good cooling effect on the low-pressure chamber 101; the second cooling module 300 is provided with two integrated air conditioners, which can have a good cooling effect on the transformer chamber 102; and the internal and external units of the integrated air conditioners are independently circulated, which can prevent the outside air from corroding the inside of the transformer chamber 100, and the cooling effect is good.
[0055] It is conceivable that in other implementations, the first cooling module 200 may include one, two or more integrated air conditioners, and the second cooling module 300 may include one, two or more integrated air conditioners. Those skilled in the art may make specific configurations according to actual needs.
[0056] It is understandable that the first cooling module 200 may also adopt a split-type air conditioner, and the second cooling module 300 may also adopt a split-type air conditioner.
[0057] Specifically, since the heat generated by the low-voltage switch cabinet 700 is lower than that of the transformer 500 , the overall cooling capacity of the first cooling module 200 is lower than that of the second cooling module 300 , thereby saving the production cost of the transformer.
[0058] Specifically, the cabin body 110 is made by welding a sound-absorbing mesh plate on the inner layer of a corrugated plate, and filling fire-proof rock wool between the sound-absorbing mesh plate and the corrugated plate, and has good strength, noise reduction and fire-proof effects.
[0059] The utility model also discloses an offshore wind power station, which adopts the above-mentioned power conversion device. Due to the adoption of the above-mentioned power conversion device, the offshore wind power station has a longer service life and can reduce the maintenance frequency.
[0060] Specifically, the offshore wind power station has a wind turbine tower, which is electrically connected to the transformer through a cable, and a wind turbine generator set can be installed above the wind turbine tower.
[0061] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0062] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.
Claims
1. A power conversion device, characterized in that: include: A transformer compartment (100) is provided with a low-pressure chamber (101), a transformer chamber (102) and a return air duct (103); the low-pressure chamber (101) is connected to the transformer chamber (102) through the return air duct (103); A first cooling module (200) is arranged in the transformer compartment (100) and is used to cool the low-pressure chamber (101); A second cooling module (300) is arranged in the transformer compartment (100) and is used to cool the transformer chamber (102); The blower assembly (400) is arranged in the transformer compartment (100), and the blower assembly (400) is used to extract air from the low-pressure chamber (101) and discharge it to the transformer compartment (102), or the blower assembly (400) is used to extract air from the transformer compartment (102) and discharge it to the low-pressure chamber (101).
2. The power conversion device according to claim 1, characterized in that: The transformer compartment (100) comprises a compartment body (110) and a partition (120), wherein the compartment body (110) is provided with a containing chamber, wherein the partition (120) is arranged in the compartment body (110) and divides the containing chamber into the low-pressure chamber (101) and the transformer compartment (102), wherein the blower assembly (400) comprises a blower and an exhaust duct (410), wherein the exhaust duct (410) passes through the partition (120), wherein the exhaust duct (410) is provided with an exhaust air duct, wherein the low-pressure chamber (101) is connected to the transformer compartment (102) via the exhaust air duct, and wherein the blower is arranged in the exhaust duct (410) and is used to form an air flow from the low-pressure chamber (101) toward the transformer compartment (102) in the exhaust air duct.
3. The power conversion device according to claim 2, characterized in that: It also includes a transformer (500), the transformer (500) being arranged in the transformer chamber (102), the transformer (500) being provided with an indoor heat exchange portion, and the indoor heat exchange portion being located in the exhaust air duct.
4. The power conversion device according to claim 2, characterized in that: The exhaust duct (410) is arranged at the upper end of the partition (120), and the return air duct (103) is arranged at the lower end of the partition (120).
5. The power conversion device according to claim 1, characterized in that: The volume of the low-pressure chamber (101) is smaller than the volume of the voltage-changing chamber (102).
6. The power conversion device according to claim 4, characterized in that: The cabin body (110) comprises a bottom shell (111) and a cover plate (112); an upper end of the bottom shell (111) is provided with an opening; the cover plate (112) is detachably arranged above the bottom shell (111) and covers the opening; the bottom shell (111) and the cover plate (112) enclose the accommodation chamber.
7. The power conversion device according to claim 3, characterized in that: It also includes an oil-air cooler (600), the oil-air cooler (600) being arranged outside the transformer compartment (100), the transformer (500) being an oil-immersed transformer (500), and the transformer (500) being connected to the oil-air cooler (600) via a refrigerant pipeline.
8. The power conversion device according to claim 7, characterized in that: An oil storage chamber is provided at the bottom of the transformer compartment (100), a recovery hole (104) is provided on the bottom wall of the transformer chamber (102), the oil storage chamber is located below the transformer chamber (102), the oil storage chamber is connected to the transformer chamber (102) through the recovery hole (104), and an oil drain assembly is provided in the oil storage chamber.
9. The power conversion device according to claim 1, characterized in that: The first cooling module (200) includes at least one integrated air conditioner, and the second cooling module (300) includes at least one integrated air conditioner.
10. An offshore wind power station, characterized in that: It comprises the power conversion device as claimed in any one of claims 1 to 9.