CN113937959A - Offshore doubly-fed generator slip ring cooling system and method - Google Patents
Offshore doubly-fed generator slip ring cooling system and method Download PDFInfo
- Publication number
- CN113937959A CN113937959A CN202111237699.XA CN202111237699A CN113937959A CN 113937959 A CN113937959 A CN 113937959A CN 202111237699 A CN202111237699 A CN 202111237699A CN 113937959 A CN113937959 A CN 113937959A
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- Prior art keywords
- slip ring
- offshore
- cooling
- fed generator
- air
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/28—Cooling of commutators, slip-rings or brushes e.g. by ventilating
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/10—Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. water or fingers
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
- H02K5/207—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium with openings in the casing specially adapted for ambient air
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/26—Structural association of machines with devices for cleaning or drying cooling medium, e.g. with filters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Wind Motors (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
The invention belongs to the technical field of a slip ring system of a doubly-fed generator, and provides a cooling system and a cooling method for a slip ring of an offshore doubly-fed generator. The system comprises: a slip ring component; a slip ring box; a cooling fan; a valve; and a filtration system comprising a rain separator, primary filter cotton, and medium/high efficiency filter cotton. The reliability of the slip ring system of the offshore doubly-fed generator can be effectively improved, and a foundation is laid for offshore application of the doubly-fed generator; the slip ring cooling and the engine room cooling are decoupled without mutual influence, so that the protection performance of other components in the engine room is ensured; in addition, when the system stops running, condensation on the surface of the slip ring is not easy to generate due to the protection of the air inlet and the air outlet, the surface of the slip ring is not easy to corrode, and the reliability of the system in running again is ensured; in addition, the carbon powder collecting device is simple, can meet the flame-retardant requirement and has longer service life.
Description
Technical Field
The invention relates to the technical field of a slip ring system of a double-fed generator. Specifically, the invention relates to a slip ring cooling system and method for an offshore doubly-fed generator.
Background
For doubly fed generators, the reliable operation of the slip ring system is directly related to the health of the slip rings, the carbon brushes and the oxide film formed by the interaction of the slip rings and the carbon brushes. In the prior art, the cooling of a slip ring system generally adopts a technical scheme of no protection for air inlet and outlet with the protection grade of IP 23. However, in marine or similar environments, the lifetime of slip rings is susceptible to significant degradation from the effects of a humid salt fog environment.
In addition, in order to meet the requirement of environmental protection, a slip ring system applied on the sea has the function of collecting carbon powder, and the carbon powder collecting device in the prior art has a complex structure and cannot meet the requirement of flame retardance.
Disclosure of Invention
To at least partially solve the above problems in the prior art, the present invention provides a slip ring cooling system for an offshore doubly-fed generator, comprising:
a slip ring component;
a slip ring case configured to house the slip ring component and to decouple the slip ring component from a nacelle environment of an offshore doubly fed generator, wherein the slip ring case has an air intake and an air outlet;
a filter system configured to filter air;
a cooling fan configured to flow air through the filtration system and to flow filtered air through the slip ring component to cool the slip ring component; and
a valve disposed at the air outlet to close and open the air outlet.
In one embodiment of the invention, it is provided that the filtration system comprises a rain separator, a primary filter cotton and a medium/high efficiency filter cotton; and/or
Wherein the valve comprises a shutter and a movable wind deflector.
In one embodiment of the invention, it is provided that the rainwater separator is configured to filter water vapor and to filter dust particles with a particle size of more than or equal to 15 μm.
In one embodiment of the invention, it is provided that the primary filter cotton is configured to filter dust particles with a particle size of less than 15 μm and 4 μm or more.
In one embodiment of the invention, it is provided that the medium/high efficiency filter cotton is configured to filter dust particles with a particle size of less than 4 μm and 0.4 μm or more and to filter salt spray.
In one embodiment of the invention, it is provided that the cooling fan is arranged in the axial direction of the slip ring part within the slip ring box; or
The cooling fan is arranged outside the slip ring box.
In one embodiment of the invention, metal filter cotton is arranged at the air outlet and is configured to filter and collect carbon powder.
In one embodiment of the invention, it is provided that the slip ring box has a heater which is configured to heat the air in the slip ring box when the slip ring part is not in operation.
The invention also provides a method for cooling a slip ring by using the slip ring cooling system of the offshore doubly-fed generator, which is characterized by comprising the following steps of:
the air is driven by a cooling fan to sequentially pass through a rainwater separator, primary filter cotton and medium/high-efficiency filter cotton, wherein the rainwater separator filters water vapor and filters dust particles larger than or equal to 15 mu m, the primary filter cotton filters dust particles with the particle size smaller than 15 mu m and larger than or equal to 4 mu m, and the medium/high-efficiency filter cotton filters dust particles with the particle size smaller than 4 mu m and larger than or equal to 0.4 mu m and filters salt fog; and
and the air after being driven and filtered by the cooling fan enters the cooling slip ring component in the slip ring box through the air inlet, and the driving air is discharged from the air outlet through the metal filter cotton and the shutter, wherein the metal filter cotton is used for filtering and collecting carbon powder.
In one embodiment of the invention, the heater is used for heating the gas in the slip ring box when the marine doubly-fed generator slip ring cooling system is stopped so as to prevent external air from entering the slip ring box.
The invention also provides a wind driven generator which is provided with the marine doubly-fed generator slip ring cooling system.
The invention has at least the following beneficial effects: the reliability of the slip ring system of the offshore doubly-fed generator can be effectively improved, and a foundation is laid for offshore application of the doubly-fed generator; the slip ring cooling and the engine room cooling are decoupled without mutual influence, so that the protection performance of other components in the engine room is ensured; in addition, when the system stops running, condensation on the surface of the slip ring is not easy to generate due to the protection of the air inlet and the air outlet, the surface of the slip ring is not easy to corrode, and the reliability of the system in running again is ensured; in addition, the carbon powder collecting device is simple, can meet the flame-retardant requirement and has longer service life.
Drawings
To further clarify the advantages and features that may be present in various embodiments of the present invention, a more particular description of various embodiments of the invention will be rendered by reference to the appended drawings. It is appreciated that these drawings depict only typical embodiments of the invention and are therefore not to be considered limiting of its scope. In the drawings, the same or corresponding parts will be denoted by the same or similar reference numerals for clarity.
Fig. 1 shows a schematic view of a wind power generator to which the present invention is applied.
Fig. 2 shows a schematic structural diagram of a slip ring cooling system of an offshore doubly-fed generator according to an embodiment of the invention.
Detailed Description
It should be noted that the components in the figures may be exaggerated and not necessarily to scale for illustrative purposes. In the figures, identical or functionally identical components are provided with the same reference symbols.
In the present invention, "disposed on …", "disposed over …" and "disposed over …" do not exclude the presence of an intermediate therebetween, unless otherwise specified. Further, "disposed on or above …" merely indicates the relative positional relationship between two components, and may also be converted to "disposed below or below …" and vice versa in certain cases, such as after reversing the product direction.
In the present invention, the embodiments are only intended to illustrate the aspects of the present invention, and should not be construed as limiting.
In the present invention, the terms "a" and "an" do not exclude the presence of a plurality of elements, unless otherwise specified.
It is further noted herein that in embodiments of the present invention, only a portion of the components or assemblies may be shown for clarity and simplicity, but those of ordinary skill in the art will appreciate that, given the teachings of the present invention, required components or assemblies may be added as needed in a particular scenario. Furthermore, features from different embodiments of the invention may be combined with each other, unless otherwise indicated. For example, a feature of the second embodiment may be substituted for a corresponding or functionally equivalent or similar feature of the first embodiment, and the resulting embodiments are likewise within the scope of the disclosure or recitation of the present application.
It is also noted herein that, within the scope of the present invention, the terms "same", "equal", and the like do not mean that the two values are absolutely equal, but allow some reasonable error, that is, the terms also encompass "substantially the same", "substantially equal". By analogy, in the present invention, the terms "perpendicular", "parallel" and the like in the directions of the tables also cover the meanings of "substantially perpendicular", "substantially parallel".
The numbering of the steps of the methods of the present invention does not limit the order of execution of the steps of the methods. Unless specifically stated, the method steps may be performed in a different order.
First, explaining the principle on which the present invention is based, the present inventors found through research that one important reason why slip rings of offshore wind turbines are easily damaged is that at present, slip rings are cooled by either introducing cooling wind directly from the offshore environment or by using cabin cooling wind or cabin environment wind directly introduced from the offshore environment; in the marine or similar humid environment, the cooling air introduced from the marine environment of the slip ring system can lead the slip ring part to be in the humid salt fog environment for a long time, and the humid salt fog environment can further cause the corrosion of the slip ring, the carbon brush and the oxide film, thereby influencing the reliable operation of the slip ring system; furthermore, the inventors have found that when the slip ring system is not in operation, the cooling system without protection from the incoming and outgoing air can cause condensation on the slip ring surface, which can cause corrosion of the slip ring surface, and spark erosion can occur when the slip ring system is in operation again. The inventor of the present invention has further found that by filtering the cooling air for cooling the slip ring to remove the salt spray component and decoupling the slip ring from the nacelle cooling system, so that the cooling air for cooling the slip ring has no direct gas exchange with the nacelle cooling system, the slip ring can be substantially protected from the salt spray environment and the surface of the slip ring can be prevented from being exposed to condensation, thereby greatly improving the life of the slip ring. In the present invention, the term "decoupled" means that the cooling wind of the slip ring has no direct gas exchange with the ambient air or cooling wind of the nacelle, for example they can be isolated from each other to prevent gas exchange.
The invention is further elucidated with reference to the drawings in conjunction with the detailed description.
Fig. 1 shows a schematic view of a wind turbine 100 to which the present invention is applied. As shown in FIG. 1, wind generating set 100 includes a tower 101, a nacelle 102 rotatably connected to tower 101 and supporting a hub 103. Two or more blades 104 are arranged on the hub 103, wherein the blades 104 rotate a generator (not shown) under the influence of wind power, thereby generating electrical energy.
Fig. 2 shows a schematic structural diagram of a slip ring cooling system of an offshore doubly-fed generator according to an embodiment of the present invention, where the cooling system may include a slip ring component, a slip ring box/a slip ring chamber, a cooling fan, a valve, and a filtering system.
The slip ring box/slip ring chamber surrounds or accommodates the slip ring component 201 and decouples the slip ring component 201 from the nacelle environment of the nacelle 102 of the wind turbine generator system 100, wherein the slip ring box/slip ring chamber has an air inlet and an air outlet, and in this embodiment, the slip ring box 202 is taken as an example.
The filtration system may for example comprise a rain separator 203, a primary filter cotton 204 and a medium/high efficiency filter cotton 205, wherein the rain separator 203 may filter water vapour and filter dust particles with a particle size of more than or equal to 15 μm, the primary filter cotton 204 may filter dust particles with a particle size of less than 15 μm and more than or equal to 4 μm, the medium/high efficiency filter cotton 205 is configured to filter dust particles with a particle size of less than 4 μm and more than or equal to 0.4 μm and filter salt fog. Other filtration devices are also contemplated under the teachings of the present invention.
The air outlet can be further provided with metal filter cotton 207, and the metal filter cotton 207 can filter and collect carbon powder generated by the operation of the slip ring component.
The valve, which may be, for example, a louver 208 and/or a movable wind deflector as shown in fig. 2, is arranged at the wind outlet to close and open the wind outlet.
The cooling fan may flow air through the rain separator 203, the primary filter 204, and the middle/high efficiency filter 205 in sequence, and flow the filtered air through the slip ring part 201 to cool the slip ring part 201 and blow away carbon powder generated during the operation of cleaning the slip ring part 201, and then filter and collect the carbon powder through the metal filter 207 and discharge the carbon powder from the louver 208 to the outside of the cabin. The cooling fan may be arranged outside the slip ring case 202 as shown by the cooling fan 206 in fig. 2, or may be arranged in the axial direction of the slip ring part 201 inside the slip ring case 202.
The slip ring box 202 may have a heater therein, the heater may heat the gas in the slip ring box 202 when the slip ring component 201 stops operating and the slip ring cooling system of the offshore doubly-fed generator stops operating, the filter system and the cooling fan 206 connected to the air inlet may be matched to effectively prevent the external air from entering from the front end, and the louver 208 connected to the air outlet and closed at the tail may also be matched to effectively prevent the external air from entering from the rear end, thereby effectively avoiding the influence of the external environment.
In an embodiment of the invention, a method for cooling a slip ring by using the slip ring cooling system of the offshore doubly-fed generator is further provided, and the method comprises the following steps:
the air driven by the cooling fan 206 sequentially passes through the rainwater separator 203, the primary filter cotton 204 and the medium/high-efficiency filter cotton 205, wherein the rainwater separator 203 filters water vapor and filters dust particles larger than 15um, the primary filter cotton 204 filters dust particles with the particle size smaller than 15 μm and larger than or equal to 4 μm, and the medium/high-efficiency filter cotton 205 filters dust particles with the particle size smaller than 4 μm and larger than or equal to 0.4 μm and filters salt fog; and
the filtered air driven by the cooling fan 206 enters the cooling slip ring assembly 201 in the slip ring box 202 through the intake vent and the driven air is exhausted from the exhaust vent through the metal filter wool 207 that filters the carbon dust generated by the operation of the collection slip ring assembly 201 and the louver 208.
In addition, the heater can heat the air in the slip ring box 202 when the marine doubly-fed generator slip ring cooling system is shut down, the filter system and the cooling fan 206 connected with the air inlet can effectively prevent the outside air from entering from the front end, and the louver 208 closed at the tail part connected with the air outlet can also effectively prevent the outside air from entering from the rear end.
The reliability of the slip ring system of the offshore doubly-fed generator can be effectively improved through the method, and a foundation is laid for offshore application of the doubly-fed generator; the slip ring cooling and the engine room cooling are decoupled without mutual influence, so that the protection performance of other components in the engine room is ensured; in addition, when the system stops running, condensation on the surface of the slip ring is not easy to generate due to the protection of the air inlet and the air outlet, the surface of the slip ring is not easy to corrode, and the reliability of the system in running again is ensured; in addition, the carbon powder collecting device is simple, can meet the flame-retardant requirement and further has longer service life.
While various embodiments of the present invention have been described above, it should be understood that they have been presented by way of example only, and not limitation. It will be apparent to persons skilled in the relevant art that various combinations, modifications, and changes can be made thereto without departing from the spirit and scope of the invention. Thus, the breadth and scope of the present invention disclosed herein should not be limited by any of the above-described exemplary embodiments, but should be defined only in accordance with the following claims and their equivalents.
Claims (11)
1. A slipring cooling system for an offshore doubly-fed generator, comprising:
a slip ring component;
a slip ring case configured to house the slip ring component and to isolate the slip ring component from air in a nacelle of an offshore doubly fed generator, wherein the slip ring case has an air inlet and an air outlet;
a filter system configured to filter air introduced from the air inlet;
a cooling fan configured to flow air through the filtration system and to flow filtered air through the slip ring component to cool the slip ring component; and
a valve disposed at the air outlet to close and open the air outlet.
2. The slip ring cooling system of claim 1, wherein the filtration system comprises a rain separator, a primary filter cotton, and a medium/high efficiency filter cotton; and/or
Wherein the valve comprises a shutter and a movable wind deflector.
3. The slipring cooling system of an offshore doubly fed generator of claim 2, characterized in that said rain separator is configured to filter water vapour and to filter dust particles with a particle size larger than or equal to 15 μm.
4. The slipring cooling system of an offshore doubly fed generator as claimed in claim 2, wherein said primary filter cotton is configured to filter dust particles with a particle size of less than 15 μm and equal to or greater than 4 μm.
5. The slipring cooling system of an offshore doubly fed generator of claim 2, characterized in that said medium/high efficiency filter cotton is configured to filter dust particles with a particle size of less than 4 μm and equal to or greater than 0.4 μm and to filter salt spray.
6. Marine doubly-fed generator slip ring cooling system as claimed in claim 1, wherein said cooling fan is arranged in an axial direction of said slip ring part inside a slip ring box; or the cooling fan is arranged outside the slip ring case.
7. The slipring cooling system of offshore doubly fed generator of claim 1, characterized in that at said air outlet there is arranged a metal filter cotton configured to filter and collect carbon dust.
8. The offshore doubly fed generator slip ring cooling system of claim 1, wherein the slip ring box has a heater configured to heat air within the slip ring box when the slip ring components are not in operation.
9. A method for cooling slip rings by using the slip ring cooling system of marine doubly fed generator as claimed in any of claims 1 to 8, characterized by comprising the following steps:
the air is driven by a cooling fan to sequentially pass through a rainwater separator, primary filter cotton and medium/high-efficiency filter cotton, wherein the rainwater separator filters water vapor and filters dust particles larger than or equal to 15 mu m, the primary filter cotton filters dust particles with the particle size smaller than 15 mu m and larger than or equal to 4 mu m, and the medium/high-efficiency filter cotton filters dust particles with the particle size smaller than 4 mu m and larger than or equal to 0.4 mu m and filters salt fog; and
and the air after being driven and filtered by the cooling fan enters the cooling slip ring component in the slip ring box through the air inlet, and the driving air is discharged from the air outlet through the metal filter cotton and the shutter, wherein the metal filter cotton is used for filtering and collecting carbon powder.
10. The method for cooling slip rings of claim 9, wherein the gas inside the slip ring box is heated by a heater at shutdown of the offshore doubly fed generator slip ring cooling system to avoid outside air entering the slip ring box.
11. Wind power generator with a slipring cooling system of an offshore doubly fed generator as claimed in any of the claims 1 to 8.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111237699.XA CN113937959A (en) | 2021-10-22 | 2021-10-22 | Offshore doubly-fed generator slip ring cooling system and method |
| PCT/CN2022/126692 WO2023066375A1 (en) | 2021-10-22 | 2022-10-21 | Offshore doubly-fed generator slip ring cooling system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111237699.XA CN113937959A (en) | 2021-10-22 | 2021-10-22 | Offshore doubly-fed generator slip ring cooling system and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113937959A true CN113937959A (en) | 2022-01-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111237699.XA Pending CN113937959A (en) | 2021-10-22 | 2021-10-22 | Offshore doubly-fed generator slip ring cooling system and method |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN113937959A (en) |
| WO (1) | WO2023066375A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023066375A1 (en) * | 2021-10-22 | 2023-04-27 | 远景能源有限公司 | Offshore doubly-fed generator slip ring cooling system and method |
| WO2024037677A1 (en) | 2022-08-16 | 2024-02-22 | Cebes A.S. | Slip ring device for a doubly-fed induction generator |
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| CN204967483U (en) * | 2015-10-14 | 2016-01-13 | 江苏航天动力机电有限公司 | Sliding ring cover that protection level is high |
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| CN110429764A (en) * | 2019-07-23 | 2019-11-08 | 远景能源（江苏）有限公司 | A kind of slip ring cooling system |
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| CN112012893A (en) * | 2020-08-20 | 2020-12-01 | 远景能源有限公司 | Cooling system of wind driven generator |
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| EP3291423A1 (en) * | 2016-08-29 | 2018-03-07 | Siemens Aktiengesellschaft | Slip ring assembly |
| CN113937958A (en) * | 2021-10-22 | 2022-01-14 | 远景能源有限公司 | Closed marine doubly-fed generator slip ring cooling system and method |
| CN113937959A (en) * | 2021-10-22 | 2022-01-14 | 远景能源有限公司 | Offshore doubly-fed generator slip ring cooling system and method |
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2021
- 2021-10-22 CN CN202111237699.XA patent/CN113937959A/en active Pending
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- 2022-10-21 WO PCT/CN2022/126692 patent/WO2023066375A1/en unknown
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN204967483U (en) * | 2015-10-14 | 2016-01-13 | 江苏航天动力机电有限公司 | Sliding ring cover that protection level is high |
| US20180083511A1 (en) * | 2016-09-22 | 2018-03-22 | Ge Renewable Technologies | Combined cooling and dust extrusion device and method |
| CN110429764A (en) * | 2019-07-23 | 2019-11-08 | 远景能源（江苏）有限公司 | A kind of slip ring cooling system |
| CN210669786U (en) * | 2019-11-11 | 2020-06-02 | 第海鹏 | Promote combination wind path structure of motor body and motor sliding ring cooling effect |
| CN212850167U (en) * | 2020-08-12 | 2021-03-30 | 西安中车永电捷力风能有限公司 | Slip ring chamber structure of integrated carbon powder filtering device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023066375A1 (en) * | 2021-10-22 | 2023-04-27 | 远景能源有限公司 | Offshore doubly-fed generator slip ring cooling system and method |
| WO2024037677A1 (en) | 2022-08-16 | 2024-02-22 | Cebes A.S. | Slip ring device for a doubly-fed induction generator |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023066375A1 (en) | 2023-04-27 |
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