CN113074093A - Wind generating set with heat pump self-deicing system and working method thereof - Google Patents
Wind generating set with heat pump self-deicing system and working method thereof Download PDFInfo
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- CN113074093A CN113074093A CN202110475093.3A CN202110475093A CN113074093A CN 113074093 A CN113074093 A CN 113074093A CN 202110475093 A CN202110475093 A CN 202110475093A CN 113074093 A CN113074093 A CN 113074093A
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- 238000007710 freezing Methods 0.000 claims description 12
- 230000008014 freezing Effects 0.000 claims description 12
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- 238000010438 heat treatment Methods 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 2
- 230000007613 environmental effect Effects 0.000 claims 1
- 238000010248 power generation Methods 0.000 abstract description 5
- 238000005265 energy consumption Methods 0.000 description 3
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
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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
- F03D80/40—Ice detection; De-icing means
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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
- F03D15/00—Transmission of mechanical power
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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
- F03D17/00—Monitoring or testing of wind motors, e.g. diagnostics
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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
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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
- F03D80/80—Arrangement of components within nacelles or towers
- F03D80/82—Arrangement of components within nacelles or towers of electrical components
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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
- F03D80/80—Arrangement of components within nacelles or towers
- F03D80/88—Arrangement of components within nacelles or towers of mechanical components
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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
- F03D9/22—Wind motors characterised by the driven apparatus the apparatus producing heat
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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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- 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
- F03D9/28—Wind motors characterised by the driven apparatus the apparatus being a pump or a compressor
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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)
- 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)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Wind Motors (AREA)
Abstract
The invention discloses a wind generating set with a heat pump self-deicing system and a working method thereof, and belongs to the technical field of wind power generation. The blades are connected with a hub, the hub is connected with a low-speed shaft, the low-speed shaft is connected with a gear transmission system, and the gear transmission system is respectively connected with a high-speed shaft of the generator and a high-speed shaft of the heat pump loop; the generator high-speed shaft is connected with a generator, and a generator cooling heat exchanger is arranged in the generator; the high-speed shaft of the heat pump loop is connected with a compressor of the heat pump circulation loop; the blade deicing circulation loop is provided with a heater and a deicing fan and is communicated with the blade deicing device; a blade tip thermodetector is arranged on the blade; the heat pump circulation loop and the blade deicing circulation loop exchange heat in the blade deicing heat exchanger, and the heat pump circulation loop and the external cooling loop exchange heat in the generator cooling heat exchanger. The invention can improve the integral energy utilization rate of the wind generating set, improves the generating efficiency of the wind generating set and has good application prospect.
Description
Technical Field
The invention belongs to the technical field of wind power generation, and particularly relates to a wind generating set with a heat pump self-deicing system and a working method thereof.
Background
Wind power generation is a low-carbon near-zero emission power generation mode, and can convert wind energy into electric energy so as to provide clean and renewable electric power for a power grid. The wind generating set captures wind energy through the blades and is connected with the generator through the transmission mechanism to convert mechanical energy into electric energy.
In the actual operation process of the fan, a plurality of problems can be faced. When the temperature is low in winter, the blades are easy to freeze, and a heat source needs to be provided in time for deicing; when the fan runs, the temperature inside the engine room and the temperature of the generator and the like are high, and a cold source needs to be provided for cooling the inside of the engine room. Generally, fan blade deicing and generator cooling are both achieved by introducing external energy, which results in a large loss of energy.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a wind generating set with a heat pump self-deicing system and a working method thereof, which can improve the overall energy utilization rate of the wind generating set and improve the generating efficiency of the wind generating set.
The invention is realized by the following technical scheme:
the invention discloses a wind generating set with a heat pump self-deicing system, which comprises blades, a hub, an engine room, a low-speed shaft, a generator high-speed shaft, a gear transmission system, a heat pump loop high-speed shaft, a heat pump circulation loop, a blade deicing heat exchanger, a generator cooling heat exchanger, a blade deicing circulation loop, a blade deicing device and an external cooling loop, wherein the rotor is connected with the generator high-speed shaft through a transmission shaft;
the blades are connected with a hub, the hub is connected with a low-speed shaft, the low-speed shaft is connected with a gear transmission system, and two output ends of the gear transmission system are respectively connected with a high-speed shaft of the generator and a high-speed shaft of the heat pump loop; the generator high-speed shaft is connected with a generator, and a generator cooling heat exchanger is arranged in the generator; the heat pump circulation loop comprises a compressor, and a high-speed shaft of the heat pump loop is connected with the compressor; the blade deicing device is arranged in the blade; the blade deicing circulation loop is provided with a heater and a deicing fan and is communicated with the blade deicing device; a blade tip thermodetector is arranged on the blade; the heat pump circulation loop and the blade deicing circulation loop exchange heat in the blade deicing heat exchanger, and the heat pump circulation loop and the external cooling loop exchange heat in the generator cooling heat exchanger.
Preferably, the gear transmission system comprises a first gear, a second gear and a third gear set, the first gear is meshed with the second gear and the third gear set respectively, the second gear is connected with the high-speed shaft of the heat pump circuit, and the third gear set is connected with the high-speed shaft of the generator.
Preferably, the heat pump circulation loop further comprises an expansion valve, a condenser and an evaporator, the condenser is connected with the hot side of the blade deicing heat exchanger, and the evaporator is arranged inside the generator and connected with the hot side of the generator cooling heat exchanger.
Preferably, an inlet and an outlet of the external cooling loop are both arranged outside the engine room, the external cooling loop is connected with the cold side of the generator cooling heat exchanger, and the external cooling loop is provided with a control valve and a generator cooling fan.
Preferably, the blade de-icing circulation circuit is connected to the blade de-icing device by means of a rotary joint, which is provided inside the hub.
Preferably, the blade de-icing apparatus is a plurality of radiators connected in series.
Preferably, the blade de-icing means is an elbow which is circuitously arranged inside the blade.
Further preferably, the bent pipes are arranged at the front edge of the blade with a density greater than that of the rear edge of the blade.
The invention discloses a working method of a wind generating set with a heat pump self-deicing system, which comprises the following steps:
the blades capture wind energy, the low-speed shaft is driven to rotate through the rotation of the hub, the low-speed shaft drives the high-speed shaft of the generator to rotate through the gear transmission system, and the high-speed shaft of the generator drives the generator to generate electricity;
when the ambient temperature is higher than the freezing point, the heat pump circulation loop does not work, and the high-speed shaft of the heat pump loop is separated from the gear transmission system; the generator is cooled by an external cooling loop;
when the ambient temperature is lower than the freezing point, the high-speed shaft of the heat pump loop is connected into the gear transmission system, and the heat pump circulation loop starts to work; deicing airflow in the blade deicing circulation loop exchanges heat with a medium in the heat pump circulation loop in the blade deicing heat exchanger, and enters a blade deicing device in the blade after the temperature of the deicing airflow is raised to heat and deice the blade;
the blade tip thermodetector measures the temperature of the tip of the blade in real time and feeds the temperature back to the heat pump circulation loop, the load of the compressor is adjusted, and the output of the compressor is gradually increased until the temperature of the tip of the blade is higher than the preset temperature;
when the compressor operates at the maximum power, if the temperature of the tip of the blade is still lower than the freezing point, the heater is started to perform auxiliary heating on the deicing airflow until the temperature measured by the blade tip temperature measuring instrument is higher than the preset temperature;
when the compressor operates at the maximum power, if the cooling effect of the generator is not achieved, the external cooling loop is started to carry out auxiliary cooling until the temperature of the circulating airflow in the generator meets the requirement.
Preferably, the preset temperature is ice condensation point +3 ℃, and the maximum power of the compressor is not more than 5% of the rated power of the wind generating set.
Compared with the prior art, the invention has the following beneficial technical effects:
the wind generating set with the heat pump self-deicing system disclosed by the invention is based on the principle of a heat pump, fully utilizes the energy of a fan, deices are carried out on blades, and reasonable distribution of the energy in the fan is realized. The wind wheel is connected with a gear transmission system through a low-speed shaft, and a high-speed shaft of the generator is connected with the generator to form a basic power generation structure of the wind generating set. The cooling of the generator is composed of two paths, wherein one path is a conventional external cooling loop, namely cold air is introduced from the atmosphere to exchange heat with a circulating working medium in the generator, so that heat generated by the generator is taken away; the other path is a heat pump circulation loop, the power of the loop is derived from the mechanical energy of the wind wheel, a transmission branch is additionally arranged on the basis of the original gear transmission system, and the high-speed shaft of the heat pump loop drives the compressor to do work to compress the heat pump medium. And the heat pump medium exchanges heat with the deicing airflow in the blade deicing circulation loop in the blade deicing heat exchanger to heat the deicing airflow. The heat-exchanged deicing airflow enters a blade deicing device in the blade to exchange heat with the blade to deice, and the heat-exchanged heat pump medium enters the generator to exchange heat to absorb heat generated in the running process of the generator; after heat exchange inside the generator, the heat is sent to the compressor again to realize circulation of the heat pump. The heat pump circulation circuit and the external cooling circuit form a mutual complementary relationship: when the temperature of the external environment is high and the blades are not frozen, the heat pump circulation loop is not started, only the external cooling loop is started, and external cold air is introduced to cool the generator. When the blades have an icing trend or an icing condition, firstly, a heat pump circulation loop is started to absorb heat from the side of the generator, and the heat is transferred to the blades of the fan to be deiced; if the heat transferred by the heat pump circulation loop can not completely clear the ice coating on the blades, the heater is started to introduce external energy to compensate the heat of the deicing airflow; if the heat pump circulation loop does not absorb enough heat from the generator side to cool the generator to a normal working level, the external cooling loop is started until the cooling of the generator is satisfactory. The system realizes the cascade utilization of energy in the wind generating set. The mechanical energy of the wind wheel system is utilized to drive the compressor, so that the introduction of an additional power source is avoided. The heat is redistributed through the heat pump circulation loop, the cooling of the generator and the deicing of the blades are realized, the energy consumption of the system is greatly reduced, and the heat pump system has a good application prospect.
Furthermore, the blade deicing device is provided with a plurality of radiators which are connected in series, so that more radiators can be arranged at positions which are easy to freeze according to actual conditions, the heating efficiency is high, and the arrangement is flexible.
Furthermore, the blade deicing device is an elbow pipe which is arranged inside the blade in a roundabout mode, the shape inside the blade can be attached to the elbow pipe to be arranged, the heating effect is good, and the energy consumption is low.
Furthermore, the arrangement density of the bent pipes on the front edge of the blade is higher than that of the rear edge of the blade, because ice condensation occurs on the front edge of the blade, the heating effects of the front edge of the blade and the rear edge of the blade are close, the internal temperature of the blade is balanced, and the generation of large thermal stress is avoided.
The working method of the wind generating set with the heat pump self-deicing system, disclosed by the invention, can be used for allocating the internal energy according to the actual working condition, is high in automation degree and energy utilization rate, and reduces the energy consumption of the system.
Further, the maximum power of the compressor is not more than 5% of the rated power of the wind generating set, so that the large influence on the whole output of the wind turbine is avoided.
Drawings
Fig. 1 is a schematic overall structural diagram of a wind turbine generator system with a heat pump self-deicing system according to the present invention.
In the figure, 1-blade; 2-a hub; 3-a cabin; 4-low speed shaft; 5-high-speed shaft of generator; 6-a first gear; 7-a second gear; 8-high speed shaft of heat pump circuit; 9-a compressor; 10-blade de-icing heat exchanger; 11-an expansion valve; 12-generator cooling heat exchanger; 13-generator cooling fan; 14-a heater; 15-a rotary joint; 16-a blade de-icing device; 17-a deicing fan; 18-tip thermometer.
Detailed Description
The structure and operation of the present invention will be described in further detail with reference to the accompanying drawings, in which:
referring to fig. 1, the wind turbine generator system with the heat pump self-deicing system of the present invention includes a blade 1, a hub 2, a nacelle 3, a low speed shaft 4, a generator high speed shaft 5, a gear train, a heat pump circuit high speed shaft 8, a heat pump cycle, a blade deicing heat exchanger 10, a generator cooling heat exchanger 12, a blade deicing cycle, a blade deicing device 16, and an external cooling circuit.
The blade 1 is connected with a hub 2, the hub 2 is connected with a low-speed shaft 4, the low-speed shaft 4 is connected with a gear transmission system, and two output ends of the gear transmission system are respectively connected with a generator high-speed shaft 5 and a heat pump loop high-speed shaft 8; the generator high-speed shaft 5 is connected with a generator, and a generator cooling heat exchanger 12 is arranged in the generator; the heat pump circulation loop comprises a compressor 9, and a high-speed shaft 8 of the heat pump loop is connected with the compressor 9; the blade deicing device 16 is arranged inside the blade; the blade deicing circulation loop is provided with a heater 14 and a deicing fan 17 and is communicated with a blade deicing device 16; a blade tip thermodetector 18 is arranged on the blade 1; the heat pump circulation loop exchanges heat with the blade deicing circulation loop in the blade deicing heat exchanger 10, and exchanges heat with the external cooling loop in the generator cooling heat exchanger 12.
In one embodiment of the invention, the gear transmission system comprises a first gear 6, a second gear 7 and a third gear set, the first gear 6 is meshed with the second gear 7 and the third gear set respectively, the second gear (7) is connected with a high-speed shaft 8 of the heat pump circuit, and the third gear set is connected with a high-speed shaft 5 of the generator.
In one embodiment of the invention, the heat pump cycle further comprises an expansion valve 11, a condenser connected to the hot side of the blade de-icing heat exchanger 10, and an evaporator inside the generator connected to the hot side of the generator cooling heat exchanger 12.
In one embodiment of the invention, both the inlet and the outlet of the external cooling circuit are arranged outside the nacelle 3, the external cooling circuit being connected to the cold side of the generator cooling heat exchanger 12, and the external cooling circuit being provided with a control valve and a generator cooling fan 13.
In one embodiment of the invention, the blade de-icing circulation circuit is connected to a blade de-icing unit 16 by means of a rotary joint 15, the rotary joint 15 being arranged inside the hub 2.
In one embodiment of the invention, the blade de-icing apparatus 16 is a plurality of radiators connected in series. According to practical experience, a plurality of radiators can be arranged at the position where icing is easy to occur
In a preferred embodiment of the present invention, the blade de-icing device 16 is a bent pipe, which is a serpentine pipe or a square wave pipe, and is disposed inside the blades in a winding manner. Preferably, the bent pipes are arranged at the front edge of the blade more densely than at the rear edge of the blade.
In a preferred embodiment of the present invention, the blade deicing heat exchanger 10 and the generator cooling heat exchanger 12 are both gas-gas phase heat exchangers, and the heat exchange efficiency is high.
The working method of the wind generating set with the heat pump self-deicing system comprises the following steps:
the blades 1 capture wind energy, the low-speed shaft 4 is driven to rotate through the rotation of the hub 2, the low-speed shaft 4 drives the third gear set to rotate through the first gear 6, the third gear set drives the high-speed shaft 5 of the generator to rotate, and the high-speed shaft 5 of the generator drives the generator to generate electricity;
when the ambient temperature is higher than the freezing point (generally 3 ℃), the heat pump circulation loop does not work, and the second gear 7 connected with the high-speed shaft 8 of the heat pump loop is not meshed with the first gear 6; the generator is cooled by an external cooling loop;
when the ambient temperature is lower than the freezing point, the second gear 7 is meshed with the first gear 6, and the high-speed shaft 8 of the heat pump loop is connected to a gear transmission system to drive the compressor 9 to do work. The compressor 9 compresses a heat pump medium, the medium is pressurized, heat is released, heat exchange is completed in the blade deicing heat exchanger 10, and the heat is transferred to deicing airflow in the blade deicing circulation loop. The heat pump medium after heat exchange is reduced in temperature, enters the expansion valve 11, is increased in volume, flows through the generator cooling heat exchanger 12 after being further reduced in temperature, absorbs heat of circulating airflow inside the generator, cools the generator, and then flows into the compressor 9 again, so that heat pump circulation is formed. The deicing airflow exchanges heat with a medium in a heat pump circulation loop in the blade deicing heat exchanger 10, and enters a blade deicing device 16 in the blade 1 through a rotary joint 15 after the temperature of the deicing airflow is raised, so that the blade 1 is heated and deiced;
the blade tip thermodetector 18 measures the temperature of the tip of the blade 1 in real time and feeds the temperature back to a heat pump circulation loop, the load of the compressor 9 is adjusted, and the output of the compressor 9 is gradually increased until the temperature of the tip of the blade 1 is higher than the freezing point by 3 ℃;
when the compressor 9 operates at the maximum power, if the temperature of the tip of the blade 1 is still lower than the freezing point, the heater 14 is started to perform auxiliary heating on the deicing air flow until the temperature measured by the blade tip temperature measuring instrument 18 is higher than the freezing point by 3 ℃;
when the compressor 9 operates at the maximum power, if the cooling effect of the generator is not achieved, the external cooling loop is started to perform auxiliary cooling until the temperature of the circulating airflow in the generator meets the requirement.
Generally, the maximum power of the compressor is not more than 5% of the rated power of the wind generating set.
The foregoing description is only exemplary of the preferred embodiments of the invention and is illustrative of the principles and techniques that may be employed. Meanwhile, the scope of the present invention is not limited to the specific combinations of the above-described features, and other embodiments in which the above-described features or their equivalents are arbitrarily combined without departing from the spirit of the present invention are also encompassed. For example, the above features and (but not limited to) features having similar functions disclosed in the present invention are mutually replaced to form the technical solution.
Claims (10)
1. A wind generating set with a heat pump self-deicing system is characterized by comprising blades (1), a hub (2), a cabin (3), a low-speed shaft (4), a generator high-speed shaft (5), a gear transmission system, a heat pump loop high-speed shaft (8), a heat pump circulation loop, a blade deicing heat exchanger (10), a generator cooling heat exchanger (12), a blade deicing circulation loop, a blade deicing device (16) and an external cooling loop;
the blade (1) is connected with the hub (2), the hub (2) is connected with the low-speed shaft (4), the low-speed shaft (4) is connected with the gear transmission system, and two output ends of the gear transmission system are respectively connected with the high-speed shaft (5) of the generator and the high-speed shaft (8) of the heat pump loop; the generator high-speed shaft (5) is connected with a generator, and a generator cooling heat exchanger (12) is arranged in the generator; the heat pump circulation loop comprises a compressor (9), and a high-speed shaft (8) of the heat pump loop is connected with the compressor (9); the blade deicing device (16) is arranged inside the blade; a heater (14) and a deicing fan (17) are arranged on the blade deicing circulation loop, and the blade deicing circulation loop is communicated with a blade deicing device (16); a blade tip thermodetector (18) is arranged on the blade (1); the heat pump circulation loop and the blade deicing circulation loop exchange heat in the blade deicing heat exchanger (10), and the heat pump circulation loop and the external cooling loop exchange heat in the generator cooling heat exchanger (12).
2. Wind park according to claim 1, wherein the gear transmission system comprises a first gear (6), a second gear (7) and a third gear set, the first gear (6) meshing with the second gear (7) and the third gear set, respectively, the second gear (7) being connected to the heat pump circuit high speed shaft (8) and the third gear set being connected to the generator high speed shaft (5).
3. Wind turbine generator system with self-deicing system with heat pump according to claim 1, characterized in that the heat pump circulation circuit further comprises an expansion valve (11), a condenser and an evaporator, the condenser being connected to the hot side of the blade deicing heat exchanger (10), the evaporator being arranged inside the generator and being connected to the hot side of the generator cooling heat exchanger (12).
4. Wind power plant with heat pump self-deicing system according to claim 1, characterized in that the inlet and outlet of the external cooling circuit are both provided outside the nacelle (3), the external cooling circuit being connected to the cold side of the generator cooling heat exchanger (12), the external cooling circuit being provided with a control valve and a generator cooling fan (13).
5. Wind park according to claim 1, wherein the blade de-icing circulation circuit is connected to the blade de-icing device (16) by means of a rotary joint (15), the rotary joint (15) being provided inside the hub (2).
6. Wind park according to claim 1, wherein the blade de-icing device (16) is a plurality of radiators in series.
7. Wind park according to claim 1, wherein the blade de-icing device (16) is an elbow winding placed inside the blade, with a heat pump self-deicing system.
8. The wind generating set with the heat pump self-deicing system according to claim 7, wherein the bent pipes are arranged at the leading edge of the blade with a density greater than that of the trailing edge of the blade.
9. The working method of the wind generating set with the heat pump self-deicing system according to any one of claims 1 to 8, comprising:
the blades (1) capture wind energy, the low-speed shaft (4) is driven to rotate through the rotation of the hub (2), the low-speed shaft (4) drives the generator high-speed shaft (5) to rotate through a gear transmission system, and the generator high-speed shaft (5) drives the generator to generate electricity;
when the ambient temperature is higher than the freezing point, the heat pump circulation loop does not work, and the high-speed shaft (8) of the heat pump loop is separated from the gear transmission system; the generator is cooled by an external cooling loop;
when the environmental temperature is lower than the freezing point, the high-speed shaft (8) of the heat pump loop is connected into the gear transmission system, and the heat pump circulation loop starts to work; deicing airflow in the blade deicing circulation loop exchanges heat with a medium in a heat pump circulation loop in the blade deicing heat exchanger (10), and enters a blade deicing device (16) in the blade (1) after the temperature of the deicing airflow is raised to heat and deice the blade (1);
the blade tip thermodetector (18) measures the temperature of the tip of the blade (1) in real time and feeds the temperature back to the heat pump circulation loop, the load of the compressor (9) is adjusted, the output of the compressor (9) is gradually increased until the temperature of the tip of the blade (1) is higher than the preset temperature;
when the compressor (9) operates at the maximum power, if the temperature of the tip of the blade (1) is still lower than the freezing point, the heater (14) is started to perform auxiliary heating on the deicing airflow until the temperature measured by the blade tip temperature measuring instrument (18) is higher than the preset temperature;
when the compressor (9) operates at the maximum power, if the cooling effect of the generator is not achieved, the external cooling loop is started to carry out auxiliary cooling until the temperature of the circulating airflow in the generator meets the requirement.
10. The method according to claim 9, wherein the preset temperature is +3 ℃ of freezing point and the maximum compressor power is not greater than 5% of the rated power of the wind turbine generator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110475093.3A CN113074093B (en) | 2021-04-29 | 2021-04-29 | Wind generating set with heat pump self-deicing system and working method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110475093.3A CN113074093B (en) | 2021-04-29 | 2021-04-29 | Wind generating set with heat pump self-deicing system and working method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113074093A true CN113074093A (en) | 2021-07-06 |
| CN113074093B CN113074093B (en) | 2024-02-23 |
Family
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113775490A (en) * | 2021-09-28 | 2021-12-10 | 中国船舶重工集团海装风电股份有限公司 | Design method of centralized water cooling system of wind generating set |
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| CN214741867U (en) * | 2021-04-29 | 2021-11-16 | 中国华能集团清洁能源技术研究院有限公司 | Wind generating set with heat pump is from deicing system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113775490A (en) * | 2021-09-28 | 2021-12-10 | 中国船舶重工集团海装风电股份有限公司 | Design method of centralized water cooling system of wind generating set |
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