CN113685319B - Electric excitation wind driven generator - Google Patents
Electric excitation wind driven generator Download PDFInfo
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- CN113685319B CN113685319B CN202111153843.1A CN202111153843A CN113685319B CN 113685319 B CN113685319 B CN 113685319B CN 202111153843 A CN202111153843 A CN 202111153843A CN 113685319 B CN113685319 B CN 113685319B
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- 230000005284 excitation Effects 0.000 title claims abstract description 67
- 238000004891 communication Methods 0.000 claims abstract description 5
- 238000001816 cooling Methods 0.000 claims description 40
- 239000011229 interlayer Substances 0.000 claims description 31
- 239000007788 liquid Substances 0.000 claims description 30
- 230000017525 heat dissipation Effects 0.000 claims description 24
- 239000003507 refrigerant Substances 0.000 claims description 22
- 230000000903 blocking effect Effects 0.000 claims description 9
- 239000000110 cooling liquid Substances 0.000 claims description 7
- 238000004378 air conditioning Methods 0.000 claims description 6
- 238000009423 ventilation Methods 0.000 claims description 4
- 230000004323 axial length Effects 0.000 abstract description 4
- 230000005484 gravity Effects 0.000 abstract description 4
- 230000001419 dependent effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005057 refrigeration Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
- F03D13/20—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
- F03D80/60—Cooling or heating of wind motors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
- F03D80/80—Arrangement of components within nacelles or towers
- F03D80/82—Arrangement of components within nacelles or towers of electrical components
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
- F03D80/80—Arrangement of components within nacelles or towers
- F03D80/82—Arrangement of components within nacelles or towers of electrical components
- F03D80/85—Cabling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
- F03D9/20—Wind motors characterised by the driven apparatus
- F03D9/25—Wind motors characterised by the driven apparatus the apparatus being an electrical generator
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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
-
- 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
- Y02E10/728—Onshore wind turbines
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Power Engineering (AREA)
- Wind Motors (AREA)
Abstract
The invention relates to an electrically excited wind driven generator, which comprises a cabin and a tower positioned below the cabin, wherein the generator is fixed in the cabin, and the bottom of the generator is connected with the tower through a yaw bearing and positioned above the tower; one end of a generator shaft is connected with a wind driven generator hub, a channel for accommodating a cable from a cabin to the wind driven generator hub is formed in the generator shaft, a slip ring is arranged at the tail of the generator, and the slip ring is connected with a power supply, a control system and a communication system of the wind driven generator; wherein the generator stator armature length and the generator rotor axial length are increased and the excitation power of the generator rotor is increased. The electric excitation wind driven generator is positioned in the cabin of the electric excitation wind driven generator and above the tower, and the cables pass through the inside of the generator shaft, so that the structure in the cabin is compact, the use requirement can be met, and the problem caused by the fact that the center of gravity of the cabin and the generator deviates from the center line of the tower is solved.
Description
Technical Field
The invention relates to the technical field of wind power generation, in particular to an electrically excited wind power generator.
Background
The conventional permanent magnet wind driven generator or the electric excitation wind driven generator is characterized in that the generator is arranged outside the engine room and is arranged in front of the generator and between the impeller and the engine room, so that the center of gravity of the engine room and the generator deviates from the center line of the tower, the yaw brake block is severely worn, tower resonance is easy to generate, the requirement on the load of the tower is high, and meanwhile, the unit capacity is larger. Therefore, how to solve the above-mentioned problems provides an electrically excited wind turbine to be solved by those skilled in the art.
Disclosure of Invention
Therefore, the invention aims to provide an electrically excited wind driven generator which solves the defects of the existing wind driven generator.
The invention provides an electrically excited wind power generator, comprising: a nacelle and a tower below the nacelle, a generator being fixed inside the nacelle, the bottom of the generator being connected to the tower by a yaw bearing and being located above the tower; one end of a generator shaft is connected with a wind driven generator hub, a channel for accommodating a cable from the engine room to the wind driven generator hub is formed in the generator shaft, a slip ring is arranged at the tail of the generator, and the slip ring is connected with a power supply, a control system and a communication system of the wind driven generator; wherein the generator stator armature length and the generator rotor axial length are increased and the excitation power of the generator rotor is increased.
Compared with the prior art, the invention discloses an electrically excited wind driven generator, which is characterized in that the generator is arranged in a cabin and above a tower, so that the problems that the center of gravity of the cabin and the generator deviates from the center line of the tower, a yaw brake block is seriously worn and is easy to generate tower resonance, the requirement on the load of the tower is higher, and the problem is more obvious when the unit capacity is larger are solved; however, compared with the traditional direct-drive permanent magnet wind driven generator, the diameter of the generator is greatly reduced, the linear speed of a generator rotor coil or magnetic steel is reduced, and the output voltage of the generator is also reduced.
Further, a hollow pipeline is formed inside the generator shaft, and a plurality of refrigerant pipelines are arranged on the wall of the channel of the generator shaft, which is close to the impeller side;
the generator rotor is internally provided with a plurality of first cavities used as air conditioner evaporators for absorbing heat, and the first cavities are communicated with the refrigerant pipeline;
vent holes are formed in end covers on two sides of the generator;
the generator front fan evaporator and the generator rear fan are respectively connected to two ends of the generator shaft in a one-to-one correspondence manner, synchronously rotate with the generator shaft and are both positioned in the generator; the front fan evaporator of the generator is provided with a plurality of fan blades, each fan blade is internally provided with a second cavity used as an air conditioner evaporator for absorbing heat, and the second cavities are communicated with the refrigerant pipeline.
Further, a first compressor, a second compressor and a third compressor are arranged in the hub of the wind driven generator, and a one-way valve is arranged at the inlet and the outlet of the above compressors;
the hub condenser is arranged outside the guide cover and positioned between the two blades, and the hub condenser synchronously rotates along with the hub of the wind driven generator;
one end of the expansion valve is connected with the hub condenser through a refrigerant pipeline, the other end of the expansion valve is communicated with the first cavity and the second cavity through the refrigerant pipeline, and the first cavity and the second cavity are respectively connected with the first compressor, the second compressor and the third compressor through the refrigerant pipeline.
Further, a cable platform, an excitation platform and a box transformer platform are sequentially arranged in the tower, which is close to the cabin end, from top to bottom; the current transformer is positioned on the excitation platform and is connected with the coil of the generator rotor through an excitation cable and the slip ring, and the current transformer provides an alternating current excitation power supply for the generator rotor; the generator stator is connected with a box transformer fixed on the box transformer platform through a generator power output cable.
Further, a cable platform, an excitation platform and a box transformer platform are sequentially arranged in the tower, which is close to the cabin end, from top to bottom; the excitation platform is fixedly provided with a converter and an excitation cabinet, the excitation cabinet is connected with the generator rotor coil through an excitation cable and a slip ring, and the excitation cabinet outputs direct current to excite the generator rotor; the converter is connected with the generator stator through a generator power cable, the converter converts generator electric energy into electric energy with constant frequency, and the electric energy output by the converter is boosted through a box transformer fixed on the box transformer platform and is sent to the bottom of the tower through a high-voltage cable.
Further, the liquid cooling circulation pipeline of the converter and the liquid cooling circulation pipeline of the excitation cabinet are respectively connected with a tower cooling interlayer through an excitation platform circulation pump and a cooling pipeline to form a cooling circulation system, the section of the tower cooling interlayer is an annular cavity, cooling liquid is filled in the tower cooling interlayer, an inner ring is embedded in the position of the tower corresponding to the excitation platform and forms an annular cavity with the inner ring to serve as the tower cooling interlayer, and the setting height of the tower cooling interlayer is dependent on heat generated by the converter and/or the excitation cabinet.
Further, a plurality of tower exhaust fans are installed at the position, close to the engine room, of the tower, an air inlet is formed in the bottom of the tower, and ventilation holes are formed in the cable platform, the excitation platform and the box transformer platform.
Further, an annular liquid blocking ring for blocking liquid is arranged at the vent hole corresponding to the excitation platform, and a liquid discharge channel is arranged at the lower part of the bottom plate of the excitation platform.
Further, the liquid cooling circulation pipeline of the box transformer is connected with the box leveling tower cooling interlayer through a box leveling circulating pump and a transformer oil pipeline to form a cooling circulation system, the cross section of the box leveling tower cooling interlayer is annular, transformer oil is filled in the box leveling tower cooling interlayer, an inner ring is embedded in the tower corresponding to the box leveling position, an annular cavity is formed with the inner ring to serve as the box leveling tower cooling interlayer, and the setting height of the box leveling tower cooling interlayer is dependent on heat generated by the box transformer.
Further, a vent hole corresponding to the box transformer platform is provided with an oil retainer ring for retaining oil, and a liquid discharge channel is arranged at the lower part of the bottom plate of the box transformer platform.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an electrically excited wind turbine according to the present invention;
FIG. 2 is a schematic diagram of a cooling system of a generator;
FIG. 3 is a schematic diagram showing the structure of a cooling system of a generator;
FIG. 4 is a drawing showing a top view of the excitation platform;
FIG. 5 is a schematic top view of a box transformer platform;
in the figure:
101-a guide cover; 102-airflow direction; 103-a hub condenser; 104-leaf; 105-wind generator hub; 106-compressor one; 107-compressor two; 108-compressor three; 109-a one-way valve; 112-an expansion valve;
201-a cabin; 202-nacelle stand; 203, a wind measuring bracket;
301-generator; 302-generator stator armature; 303-generator rotor; 304-an air outlet of the generator; 305-slip ring; 306-a generator shaft; 307-generator rear bearing; 308-generator rear fan; 309-generator front fan evaporator; 310-an air inlet of the generator; 311-generator front bearing; 312-excitation cable; 314-refrigerant piping;
401-yaw bearing, 402-manhole; 403-tower exhaust fan; 404-a generator power output cable; 405-tower; 406-yaw deck; 407-cable stage; 408-cable support;
501-a tower heat dissipation interlayer; 502-a current transformer; 503-exciting platform circulating pump; 504-an excitation cabinet; 505-excitation platform; 506-cooling the pipeline; 508-ventilation holes; 509-a liquid blocking ring; 510 a drain pipe;
601-box leveling tower heat sink sandwich; 602-box transformer; 603-high voltage cable; 604-a tank leveling station circulation pump; 605-a box-section platform; 606-transformer oil pipe; 609-oil slinger.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise. Unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both first and second features being in direct contact, and may also include both first and second features not being in direct contact but being in contact with each other by way of additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Because the diameter of the generator is larger, the generator needs to be arranged outside the engine room, the generator is arranged in front and between the impeller and the engine room, the center of gravity of the engine room and the generator deviates from the center line of the tower, the yaw brake block is severely worn and easy to generate tower resonance, the requirement on the load of the tower is higher, and meanwhile, the problem is more obvious when the unit capacity is larger. In order to solve the problems, the diameter of the generator is reduced, the generator is placed in the cabin and is positioned above the tower crane. However, compared with the traditional direct-drive permanent magnet wind driven generator, the diameter of the generator is greatly reduced, the linear speed of a generator rotor coil or magnetic steel is reduced, and the output voltage of the generator is also reduced.
Referring to fig. 1, the present invention provides an electrically excited wind power generator, comprising: a nacelle 201 and a tower 405 below the nacelle 201, the generator 301 being fixed inside the nacelle 201, the bottom of which is connected to the tower 405 by a yaw bearing 401 and is located above the tower 405; one end of a generator shaft 306 is connected with the wind driven generator hub 105, a channel for accommodating cables from the engine room 201 to the wind driven generator hub 105 is formed in the generator shaft 306, a slip ring 305 is mounted at the tail of the generator 301, and the slip ring 305 is connected with a power supply, a control system and a communication system of the wind driven generator; wherein the generator stator armature 302 length and the generator rotor 303 axial length are increased and the excitation power of the generator rotor 303 is increased.
Wherein, the axial length of the generator is increased to increase the length of the conducting wire cutting the magnetic force lines so as to increase the outlet voltage of the generator. According to the formula e=blv, E is electromotive force, B is magnetic induction, L is the length of the wire cutting the magnetic lines of force, V is the speed of cutting the magnetic lines of force, increasing exciting power increases magnetic induction B, increases the length of the generator rotor and stator armature, increases the length of the wire cutting the magnetic lines of force L, and B and L simultaneously increases, i.e. increases the generator outlet electromotive force, i.e. voltage. After the radial diameter of the generator is reduced, the linear speed of the generator rotor is reduced, and the speed of the magnetic lines cut by the lead wire is also reduced, so that the problems of voltage reduction of the generator caused by the increase of B and L are solved by adopting the scheme.
Advantageously, in one embodiment of the present invention, a plurality of refrigerant pipes 314 are disposed on the inner wall of the channel of the generator shaft 306 near the impeller, and the refrigerant pipes 314 may be channels directly machined on the channel wall of the generator shaft 306; the generator rotor 303 is internally provided with a plurality of first cavities used as air conditioning evaporators for absorbing heat, and the first cavities are communicated with the refrigerant pipeline 314; the two axial side walls of the generator 301 are respectively provided with a vent hole, namely a generator air inlet 310 and a generator air outlet 304; generator front fan evaporator 309 (located between generator front bearing 311 and generator rotor 303) and generator rear fan 308 (located between generator rotor 303 and generator rear bearing 307) are respectively connected to two ends of generator shaft 306 in one-to-one correspondence, and rotate synchronously with generator shaft 306, and are both located inside generator 301; the generator front fan evaporator 309 is provided with a plurality of fan blades, and each fan blade has a second cavity therein for absorbing heat of the air conditioner evaporator, and the second cavity is in communication with the refrigerant pipe 314. And thus is connected to the air conditioning compressor through the refrigerant line 314, and dissipates heat from the generator rotor 303 and the fan blades through the first and second cavities.
Advantageously, referring to fig. 2 and 3, in another embodiment of the present invention, a first compressor 106, a second compressor 107 and a third compressor 108 are installed in the hub 105 of the wind driven generator, and a check valve 109 is installed at the inlet and the outlet of the above compressors; the refrigerant can only flow in one direction in the compressor pipeline and can not flow in two directions, namely, the heat dissipation system of the air conditioner of the generator can only dissipate heat of the generator and can not heat the generator, and the three compressors are started in sequence or started in turn according to the temperature of the generator;
the hub condenser 103 is arranged outside the air guide sleeve 101 and between the two blades 104, and the hub condenser 103 synchronously rotates along with the wind driven generator hub 105;
one end of the expansion valve 112 is connected with the hub condenser 103 through a refrigerant pipeline 314, the other end is communicated with the first cavity and the second cavity through the refrigerant pipeline 314, and the first cavity and the second cavity are respectively connected with the first compressor 106, the second compressor 107 and the third compressor 108 through different refrigerant pipelines 314.
The heat dissipation of the generator uses the air conditioning refrigeration principle, and external natural wind flows through the hub condenser 103, and referring to fig. 1, 102 is an airflow trend indication, and the hub condenser 103 can rapidly release heat generated by the generator into the external air, so that the heat dissipation capacity of the wind driven generator is improved.
Referring to fig. 1, in other embodiments of the present invention, the tower 405 is provided with a cable platform 407, an excitation platform 505 and a box flattening platform 605 from top to bottom in order near the end of the nacelle 201; a current transformer 502 is located on the excitation platform 505, and is connected with the coils of the generator rotor 303 through an excitation cable 312 and the slip ring 305, and the current transformer 502 provides an alternating current excitation power supply for the generator rotor 303; the generator stator is connected to a box transformer 602 secured to the box transformer platform 605 by a generator power take off cable 404. According to the scheme, the generator rotor is excited by alternating current, the generator 301 is changed into a low-speed doubly-fed wind power generator, the changing magnetic field can cause the generator rotor metal conductive equipment to generate vortex and release additional heat, and the heat dissipation mode of the generator 301 is used for dissipating heat in an air conditioning refrigeration mode, so that the heat dissipation efficiency is high, and the temperature rise of the generator rotor can be effectively controlled.
In another embodiment of the present invention, the cable platform 407, the excitation platform 505 and the box flattening platform 605 are sequentially arranged inside the tower 405 near the end of the nacelle 201 from top to bottom; a current transformer 502 and an excitation cabinet 504 are fixed on the excitation platform 505, the excitation cabinet 504 is connected with the generator rotor 303 through an excitation cable 312 and a slip ring 305, and the excitation cabinet 504 outputs direct current to excite the generator rotor 303; the converter 502 is connected with a generator stator through a generator power cable 404, the converter 502 converts generator electric energy into electric energy with constant frequency, and the electric energy output by the converter 502 is boosted through a box transformer 602 fixed on a box transformer platform 605 and sent to the bottom of the tower through a high-voltage cable 603. In the scheme, the converter, the excitation system and the box transformer are arranged in the tower which is close to the engine room, and the cable with the voltage level of 10Kv or more is used for transmitting electric energy from the box transformer to the tower bottom, so that the cost of the cable from the engine room to the tower bottom can be greatly reduced due to the fact that the power transmission voltage is increased and the sectional area of the cable is reduced.
In the present invention, the converter 502 and the excitation cabinet 504 dissipate heat through cooling liquid, as shown in fig. 4, the liquid cooling circulation pipeline of the converter 502 and the liquid cooling circulation pipeline of the excitation cabinet 504 are respectively connected with the tower heat dissipation interlayer 501 through an excitation platform circulation pump 503 and a cooling pipeline 506 to form a cooling circulation system, the cross section of the tower heat dissipation interlayer 501 is an annular cavity filled with cooling liquid, an inner ring is embedded in the position of the tower 405 corresponding to the excitation platform 505, and an annular cavity is formed with the inner ring and used as the tower heat dissipation interlayer 501, and the setting height of the tower heat dissipation interlayer 501 depends on the heat generated by the converter 502 and the excitation cabinet 504.
In the above embodiment, the inner wall and the outer wall of the tower heat dissipation interlayer 501 release heat to the air outside the tower and inside the tower, in order to prevent the temperature inside the tower 405 from being too high, a plurality of tower exhaust fans 403 are installed at the position of the tower 405 close to the nacelle 201, an air inlet is provided in the tower 405, external air enters the interior through the air inlet, and ventilation holes 508 are provided in the cable platform 407, the excitation platform 505 and the transformer substation platform 605.
The air vent 508 corresponding to the excitation platform 505 is provided with an annular liquid blocking ring 509 for blocking liquid, so that when liquid leakage occurs in the liquid cooling circulation system of the converter 502 or the excitation cabinet 504, the cooling liquid can be prevented from polluting the inner wall of the tower 405; the liquid blocking ring is a circular ring with the vertical direction parallel to the inside of the tower, the bottom of the liquid blocking ring is connected with the excitation platform 505, a liquid draining channel 510 is arranged at the lower part of the bottom plate of the excitation platform 505, and liquid leakage generated by the liquid cooling circulation system of the converter 502 or the excitation cabinet 504 can be discharged from a drain hole at the bottom of the tower.
Referring to fig. 1 and 5, in the invention, the tank transformer heat dissipation adopts a cooling liquid mode, the liquid cooling circulation pipeline of the tank transformer 602 is connected with the tank transformer tower heat dissipation interlayer 601 through a tank transformer circulating pump 604 and a transformer oil pipeline 606 to form a cooling circulation system, the section of the tank transformer tower heat dissipation interlayer 601 is annular, transformer oil is filled in the section of the tank transformer tower heat dissipation interlayer 601, an inner ring is embedded in the position of the tower 405 corresponding to the tank transformer platform 605, an annular chamber is formed with the inner ring to serve as the tank transformer tower heat dissipation interlayer 601, and the arrangement of the tank transformer tower heat dissipation interlayer 601 is highly dependent on the heat generated by the tank transformer 602.
The inner and outer walls of the same box-section platform tower heat-dissipating sandwich 601 release heat into the air outside the tower and inside the tower; the vent hole of the box transformer substation 605 is provided with the oil retainer 609, when the liquid cooling circulation system of the box transformer substation 602 leaks, the cooling liquid can be prevented from polluting the inner wall of the tower 405, the oil retainer is a circular ring with the vertical direction parallel to the inner wall of the tower, the bottom of the oil retainer is connected with the box transformer substation 605, the bottom plate of the box transformer substation 605 is provided with the liquid discharge pipeline 510, and the liquid leakage generated by the liquid cooling circulation system of the box transformer substation 602 can be discharged from the water discharge hole at the bottom of the tower.
In some embodiments of the invention, a yaw platform 406 is arranged below the yaw bearing 401, a manhole 402 is formed on the outer wall of a tower 405 above the yaw platform 406, and maintenance personnel can enter the engine room 201 from the yaw platform 406 to overhaul and maintain the wind driven generator; a cable platform 407 is arranged below the yaw platform 406, the cable platform 407 carries an installer when the generator power output cable 404 is installed, and a cable bracket 408 is arranged between the yaw platform 406 and the cable platform 407 and is used for carrying part of the weight of the generator power output cable 404.
The generator is positioned in the cabin, a gear box is not arranged, the heat dissipation efficiency of the wind driven generator can be greatly improved through the heat dissipation treatment of an air conditioning refrigeration mode, meanwhile, the converter, the excitation system and the box transformer are arranged in a tower which is close to the cabin, the box transformer is arranged at the bottom of the tower and uses a cable with the voltage level of 10Kv or more to transmit electric energy, and the cost of the cable from the cabin to the bottom of the tower is reduced.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Further, one skilled in the art can engage and combine the different embodiments or examples described in this specification.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (9)
1. An electrically excited wind generator comprising: -a nacelle (201) and-a tower (405) below the nacelle (201), characterized in that a generator (301) is fixed inside the nacelle (201), the bottom of which is connected to the tower (405) by a yaw bearing (401) and is located above the tower (405); one end of a generator shaft (306) is connected with the wind driven generator hub (105), a channel for accommodating cables from the engine room (201) to the wind driven generator hub (105) is formed in the generator shaft (306), a slip ring (305) is arranged at the tail part of the generator (301), and the slip ring (305) is connected with a power supply, a control system and a communication system of the wind driven generator;
a hollow pipeline is formed inside the generator shaft (306), and a plurality of refrigerant pipelines (314) are arranged on the wall of the channel of the generator shaft (306) close to the impeller side;
the generator rotor (303) is internally provided with a plurality of first cavities used as air conditioning evaporators for absorbing heat, and the first cavities are communicated with the refrigerant pipeline (314);
vent holes are formed in end covers on two sides of the generator (301);
the generator front fan evaporator (309) and the generator rear fan (308) are respectively connected to two ends of the generator shaft (306) in one-to-one correspondence, synchronously rotate with the generator shaft (306), and are both positioned in the generator (301); the generator front fan evaporator (309) is provided with a plurality of fan blades, each fan blade is internally provided with a second cavity used as an air conditioner evaporator for absorbing heat, and the second cavity is communicated with the refrigerant pipeline (314).
2. An electrically excited wind power generator as claimed in claim 1, wherein a first compressor (106), a second compressor (107) and a third compressor (108) are installed in the wind power generator hub (105), and a check valve (109) is installed at the inlet and the outlet of the first compressor;
the hub condenser (103) is arranged outside the air guide sleeve (101) and is positioned between the two blades (104), and the hub condenser (103) synchronously rotates along with the wind driven generator hub (105);
one end of the expansion valve (112) is connected with the hub condenser (103) through a refrigerant pipeline (314), the other end of the expansion valve is communicated with the first cavity and the second cavity through the refrigerant pipeline (314), and the first cavity and the second cavity are respectively connected with the first compressor (106), the second compressor (107) and the third compressor (108) through the refrigerant pipeline (314).
3. The electrically excited wind power generator as claimed in claim 1, wherein a cable platform (407), an excitation platform (505) and a box transformer platform (605) are sequentially arranged in the tower (405) near the cabin (201) from top to bottom; the current transformer (502) is positioned on the excitation platform (505) and is connected with the coil of the generator rotor (303) through an excitation cable (312) and the slip ring (305), and the current transformer (502) provides alternating current excitation power for the generator rotor (303); the generator stator is connected with a box transformer (602) fixed on the box transformer platform (605) through a generator power output cable (404).
4. The electrically excited wind power generator as claimed in claim 1, wherein a cable platform (407), an excitation platform (505) and a box transformer platform (605) are sequentially arranged in the tower (405) near the cabin (201) from top to bottom; a current transformer (502) and an excitation cabinet (504) are fixed on the excitation platform (505), the excitation cabinet (504) is connected with the generator rotor (303) through an excitation cable (312) and a slip ring (305), and the excitation cabinet (504) outputs direct current to excite the generator rotor (303); the converter (502) is connected with a generator stator through a generator power output cable (404), the converter (502) converts generator electric energy into electric energy with constant frequency, and the electric energy output by the converter (502) is boosted through a box transformer (602) fixed on a box transformer platform (605) and is sent to the bottom of the tower through a high-voltage cable (603).
5. An electrically excited wind power generator as claimed in claim 3 or 4, wherein the liquid cooling circulation pipeline of the converter (502) and the liquid cooling circulation pipeline of the excitation cabinet (504) are respectively connected with the tower heat dissipation interlayer (501) through an excitation platform circulation pump (503) and a cooling pipeline (506) to form a cooling circulation system, the cross section of the tower heat dissipation interlayer (501) is an annular cavity, the interior of the tower heat dissipation interlayer is filled with cooling liquid, an inner ring is embedded in the position of the tower (405) corresponding to the excitation platform (505), the annular cavity is formed with the inner ring to serve as the tower heat dissipation interlayer (501), and the setting height of the tower heat dissipation interlayer (501) is determined by the heat generated by the converter (502) and/or the excitation cabinet (504).
6. An electrically excited wind generator as claimed in claim 5, wherein a plurality of tower exhaust fans (403) are mounted on the tower (405) near the nacelle (201), an air inlet is formed in the bottom of the tower (405), and ventilation holes (508) are formed in the cable platform (407), the excitation platform (505) and the transformer platform (605).
7. The electrically excited wind turbine of claim 6, wherein an annular liquid blocking ring (509) for blocking liquid is arranged at a vent hole (508) corresponding to the excitation platform (505), and a liquid drain channel (510) is arranged at the lower part of a bottom plate of the excitation platform (505).
8. An electrically excited wind power generator as claimed in claim 3 or 4, wherein the liquid cooling circulation pipeline of the box transformer (602) is connected with the box transformer tower cooling interlayer (601) through a box transformer circulating pump (604) and a transformer oil pipeline (606) to form a cooling circulation system, the cross section of the box transformer tower cooling interlayer (601) is annular, transformer oil is filled in the box transformer tower cooling interlayer (601), an inner ring is embedded in the position of the tower (405) corresponding to the box transformer platform (605), an annular chamber is formed with the inner ring to serve as the box transformer tower cooling interlayer (601), and the arrangement height of the box transformer tower cooling interlayer (601) is determined by the heat generated by the box transformer (602).
9. The electrically excited wind turbine of claim 8, wherein a oil retainer (609) for retaining oil is arranged at a vent hole (508) corresponding to the box transformer platform (605), and a drain channel (510) is arranged at the lower part of the bottom plate of the box transformer platform (605).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310595976.7A CN116398372A (en) | 2021-09-29 | 2021-09-29 | Tower for electric excitation wind driven generator |
| CN202111153843.1A CN113685319B (en) | 2021-09-29 | 2021-09-29 | Electric excitation wind driven generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111153843.1A CN113685319B (en) | 2021-09-29 | 2021-09-29 | Electric excitation wind driven generator |
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| CN202310595976.7A Division CN116398372A (en) | 2021-09-29 | 2021-09-29 | Tower for electric excitation wind driven generator |
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| CN113685319A CN113685319A (en) | 2021-11-23 |
| CN113685319B true CN113685319B (en) | 2023-07-21 |
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| CN202111153843.1A Active CN113685319B (en) | 2021-09-29 | 2021-09-29 | Electric excitation wind driven generator |
| CN202310595976.7A Pending CN116398372A (en) | 2021-09-29 | 2021-09-29 | Tower for electric excitation wind driven generator |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202310595976.7A Pending CN116398372A (en) | 2021-09-29 | 2021-09-29 | Tower for electric excitation wind driven generator |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101660499A (en) * | 2009-09-25 | 2010-03-03 | 哈尔滨哈飞工业有限责任公司 | Grid-connected hybrid-driven variable-pitch variable-speed constant-frequency wind turbine generator set |
| CN102769374A (en) * | 2012-05-22 | 2012-11-07 | 国电联合动力技术有限公司 | Direct drive type wind turbine generator system |
| CN111720262A (en) * | 2019-03-22 | 2020-09-29 | 西门子歌美飒可再生能源公司 | Lightning protection for direct drive wind turbines |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7821164B2 (en) * | 2007-02-15 | 2010-10-26 | General Electric Company | Method and apparatus for a superconducting generator driven by wind turbine |
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2021
- 2021-09-29 CN CN202111153843.1A patent/CN113685319B/en active Active
- 2021-09-29 CN CN202310595976.7A patent/CN116398372A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101660499A (en) * | 2009-09-25 | 2010-03-03 | 哈尔滨哈飞工业有限责任公司 | Grid-connected hybrid-driven variable-pitch variable-speed constant-frequency wind turbine generator set |
| CN102769374A (en) * | 2012-05-22 | 2012-11-07 | 国电联合动力技术有限公司 | Direct drive type wind turbine generator system |
| CN111720262A (en) * | 2019-03-22 | 2020-09-29 | 西门子歌美飒可再生能源公司 | Lightning protection for direct drive wind turbines |
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|---|---|
| CN113685319A (en) | 2021-11-23 |
| CN116398372A (en) | 2023-07-07 |
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Effective date of registration: 20230909 Address after: 308-1, Floor 3, Building 2, Yincheng INC Center Keya Project, No. 59, Tianyuan West Road, Jiangning District, Nanjing City, Jiangsu Province, 211100 (Jiangning Development Zone) Patentee after: Nanjing Huifeng New Energy Technology Co.,Ltd. Address before: 736100 Room 101, unit 3, building 10, Tangcheng Guanzhu community, Yuanquan Town, Guazhou County, Jiuquan City, Gansu Province Patentee before: Ma Xu |