CN113266529A - Wind turbine generator combining water pumping energy storage and tower barrel resistance adding and working method thereof - Google Patents
Wind turbine generator combining water pumping energy storage and tower barrel resistance adding and working method thereof Download PDFInfo
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- CN113266529A CN113266529A CN202110750767.6A CN202110750767A CN113266529A CN 113266529 A CN113266529 A CN 113266529A CN 202110750767 A CN202110750767 A CN 202110750767A CN 113266529 A CN113266529 A CN 113266529A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 162
- 238000004146 energy storage Methods 0.000 title claims abstract description 48
- 238000005086 pumping Methods 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 title claims description 15
- 238000010248 power generation Methods 0.000 claims abstract description 24
- 238000005381 potential energy Methods 0.000 claims abstract description 21
- 230000008569 process Effects 0.000 claims description 7
- 230000005611 electricity Effects 0.000 claims description 6
- 230000005284 excitation Effects 0.000 claims description 6
- 230000008878 coupling Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 238000013016 damping Methods 0.000 claims 4
- 235000017166 Bambusa arundinacea Nutrition 0.000 abstract 1
- 235000017491 Bambusa tulda Nutrition 0.000 abstract 1
- 241001330002 Bambuseae Species 0.000 abstract 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 abstract 1
- 239000011425 bamboo Substances 0.000 abstract 1
- 230000001276 controlling effect Effects 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012983 electrochemical energy storage Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000126 substance Substances 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
- 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
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B13/00—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
- F03B13/06—Stations or aggregates of water-storage type, e.g. comprising a turbine and a pump
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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
- F03D15/10—Transmission of mechanical power using gearing not limited to rotary motion, e.g. with oscillating or reciprocating members
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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
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
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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
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/0272—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor by measures acting on the 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
- F03D9/10—Combinations of wind motors with apparatus storing energy
- F03D9/13—Combinations of wind motors with apparatus storing energy storing gravitational potential energy
- F03D9/14—Combinations of wind motors with apparatus storing energy storing gravitational potential energy using liquids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2220/00—Application
- F05B2220/70—Application in combination with
- F05B2220/706—Application in combination with 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
- Y02E10/20—Hydro energy
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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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- 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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
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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
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
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- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Wind Motors (AREA)
Abstract
The invention belongs to the technical field of wind power generation equipment, and discloses a wind turbine generator set combining water pumping energy storage and tower barrel resistance adding, which comprises an impeller, a gear box, a first generator, a hydraulic coupler, a driving device, a water tower, a second generator, a water storage container and a control system, wherein the impeller is connected with the gear box; the gear box is provided with two output ends, one output end is connected with the generator, and the other output end is connected with the driving device through a hydraulic coupler; the control system is connected with the hydraulic coupler; the water tower sets up in the inside of a tower section of thick bamboo and is located the top, and the water inlet and the delivery port of water tower all communicate with water storage container, are equipped with the water wheels on this pipeline, and water wheels and second generator are connected. When the demand of the load end of the power grid is smaller or not required, the driving device pumps water from the water storage container to the water tower, the wind energy is converted into potential energy of water to be stored, and meanwhile, the water tower with the stored water can be used as a damper for the resistance of the tower cylinder, so that the amplitude of the top of the tower cylinder can be effectively reduced, the vibration of a cabin is reduced, and the generation efficiency of a unit is favorably improved.
Description
Technical Field
The invention belongs to the technical field of wind power generation equipment, and particularly relates to a wind turbine generator set combining water pumping energy storage and tower barrel resistance adding and a working method thereof.
Background
The existing energy storage technical means mainly comprise: physical energy storage, chemical energy storage and electromagnetic energy storage, wherein pumped storage, compressed air energy storage, a flywheel and the like are main means of physical energy storage. Energy storage is still not put into large-scale commercial application at the present stage due to its high cost and imperfect related technology level as a support technology for new energy development. At present, the energy storage technology is not only applied to electrochemical energy storage batteries, but also applied to energy storage of wind power plants. In the existing energy storage technology, the energy storage system is designed and configured in a wind power plant independently according to the capacity proportion, and because the cost of the energy storage system is too high, the energy storage system is rarely configured in the current wind power plant, and only a small-scale centralized energy storage system is configured in a specific wind power plant.
The traditional wind generating set does not have an energy storage function. When the demand of the load side of the power grid is low, the power grid dispatching center can limit the electric quantity of the power generation side on the grid, and at the moment, if the wind resource is good, the limited power operation of the wind generation set can cause a large amount of wind energy loss, and the economic benefit of the wind power plant is damaged; when the demand of the load side of the power grid is high, the power grid dispatching center can provide a demand for the power generation side on-grid power, and at the moment, if the wind resource is poor, the wind turbine generator set cannot respond to the on-grid power demand of the power grid. The best solution to the above problem is to arrange energy storage.
In recent years, with the rapid development of wind power technology, the height of the tower for supporting the wind turbine generator is higher and higher, and the height of the tower of many projects reaches or even exceeds 140 meters. As the height of the tower increases, the rigidity of the structure of the tower is poorer and poorer, and the deformation caused by external load is larger and larger. The large swing displacement at the top of the tower can cause the reduction of the generating efficiency of the unit and can easily cause the component failure in the unit.
Disclosure of Invention
The invention aims to provide a wind turbine generator combining water pumping energy storage and tower barrel resistance adding and a working method thereof, which can store energy and simultaneously avoid large swing displacement of the top of a tower barrel.
The invention is realized by the following technical scheme:
a wind turbine generator combining water pumping energy storage and tower barrel resistance adding comprises an impeller, a main shaft, a gear box, a first generator, a hydraulic coupler, a driving device, a water tower, a water wheel, a second generator, a water storage container and a control system;
the impeller, the main shaft and the gear box are sequentially connected, the gear box is provided with two output ends, one output end is connected with the first generator, and the other output end is connected with the driving device through a hydraulic coupler;
the control system is connected with the hydraulic coupler and used for controlling the opening and closing of the hydraulic coupler so as to control the operation of the driving device;
the water tower is arranged in the tower barrel and positioned at the top, the bottom of the water tower is provided with a water outlet, and the top of the water tower is provided with a water inlet; the water inlet is communicated with the water storage container through the driving device, the water outlet is connected with the water storage container through a pipeline, a water wheel is arranged on the pipeline and arranged at the bottom of the tower barrel, and the water wheel is connected with the second generator.
Further, the wind turbine generator set comprises a normal power generation mode, an energy storage mode and a normal power generation and energy storage combined mode;
in the normal power generation mode, the wind energy is completely converted into electric energy;
in the energy storage mode, wind energy is completely converted into potential energy of water to be stored;
when the normal power generation and energy storage combined mode is used, one part of wind energy is converted into electric energy, and the other part of wind energy is converted into potential energy of water to be stored.
Further, the driving device is arranged in the wind turbine generator cabin and is arranged at the rear end of the gear box.
Further, one of the output ends of the gear box is connected with the first generator through a coupler.
Further, the water tower is fixed at the top of the tower barrel through a fixing piece.
Further, the driving device adopts a hydraulic motor.
Further, the water wheels adopt turbines.
Further, the hydraulic coupler adopts a speed-adjustable hydraulic coupler.
Further, the water inlet is connected with a driving device through a first pipeline, and the driving device is connected with the water storage container through a second pipeline.
The invention also discloses a working method of the wind turbine generator, which comprises the following conditions:
when the load end of the power grid is in large demand and needs the full power generation of the wind generating set, the wind generating set generates power according to a normal power generation mode, and the specific process is as follows:
the control system disconnects the hydraulic coupler, disconnects the driving device from the gear box, only connects the output end of the gear box with the first generator, and generates electricity by the wind turbine generator set according to a normal power generation mode to convert all absorbed wind energy into electric energy;
when the load end of the power grid has no demand and needs the wind generating set to stop, the energy storage mode is switched to, and the specific process is as follows:
the control system controls the hydraulic coupler to be closed, the driving device is communicated with the gear box, the control system sets the stator exciting current of the first generator to be zero, and the first generator does not generate electricity; the energy of the impeller is transmitted to the gear box, the gear box drives the first generator and the driving device to operate, the first generator does not generate electric energy when idling, the driving device pumps water in the water storage container into the water tower, the energy of the impeller is completely converted into the potential energy of the water to be stored, when the power grid needs, the water in the water tower is released, when the water passes through the water wheel, the potential energy of the water is converted into mechanical energy, and the water wheel drives the second generator with the mechanical energy to generate the electric energy;
when the demand of a load end of a power grid is small and the limited demand is provided for the on-grid electric quantity of the wind generating set, the mode of combining normal power generation and energy storage is switched, and the specific process is as follows:
the control system calculates the excitation torque of the rotor of the first generator according to the requirement of a load end of a power grid, controls the power output of the first generator through the given rotor excitation torque and converts part of wind energy into electric energy;
meanwhile, the control system controls the hydraulic coupler, the output torque and the output rotating speed of the hydraulic coupler are changed, the driving device pumps water in the water storage container into the water tower, and the other part of wind energy is converted into potential energy of the water to be stored.
Compared with the prior art, the invention has the following beneficial technical effects:
the invention discloses a wind turbine generator combining water pumping energy storage and tower barrel resistance adding, wherein a gear box of a traditional wind turbine generator is changed into multi-output, and the wind turbine generator is connected with a first generator and is integrated with a driving device through a hydraulic coupler, so that the wind turbine generator can directly drive the driving device to work in a mechanical transmission mode, the aim of controlling the driving device can be achieved, an energy conversion chain is short, and the energy conversion efficiency is relatively high; the system integration level is high, and the driving device can be placed in an engine room of the wind turbine generator and connected with an output shaft of a gear box of the wind turbine generator; the water tower is arranged in the top of the tower barrel and used for storing water pumped from the water storage container to the top of the tower barrel by the driving device, so that the potential energy of the water converted from wind energy is stored; meanwhile, the water tower with water stored can be used as a damper for adding resistance to the tower barrel, the amplitude of the top of the tower barrel can be effectively reduced, the vibration of a cabin is reduced, the generating efficiency of a unit is improved, and the water tower is arranged in the tower barrel, so that a large amount of occupied area is saved; the potential energy of the water stored at the high position can be released to the bottom of the tower cylinder through the pipeline, the water wheel device is arranged at the bottom of the tower cylinder and can convert the potential energy of the water into electric energy for subsequent utilization, and meanwhile, the water in the water tower flows back to the water storage container to form recycling. The invention combines the water pumping energy storage technology and the tower barrel resistance adding technology, and avoids the large swing displacement at the top of the tower barrel while storing energy.
Furthermore, the hydraulic coupler adopts a speed-regulating type hydraulic coupler, has a flexible transmission automatic adaptation function and a stepless speed regulation function, and can change the output torque and the output rotating speed by regulating the liquid filling amount of the working cavity in operation under the condition that the rotating speed of the input end is not changed.
The invention also discloses a working method of the wind turbine generator, the working mode of the wind turbine generator is divided into a normal power generation mode, an energy storage mode and a combined mode of normal power generation and energy storage according to the requirement of a load end of a power grid, and in the normal power generation mode, a driving device is disconnected from a gear box, and wind energy is completely converted into electric energy; in the energy storage mode, the gear box drives the first generator and the driving device to operate, the first generator does not generate electric energy when idling, the driving device pumps water in the water storage container into the water tower, the energy of the impeller is completely converted into potential energy of the water to be stored, and when the power grid needs, the water in the water tower is released, and the potential energy of the water is converted into the electric energy; when the normal power generation and energy storage combined mode is used, one part of wind energy is converted into electric energy, and the other part of wind energy is converted into potential energy of water to be stored. The working method flexibly adjusts according to different power grid load end requirements, converts wind energy, stores and releases the wind energy, and achieves reasonable distribution.
Drawings
FIG. 1 is a schematic structural diagram of a wind turbine generator combining pumped storage and tower resistance adding according to the present invention;
the system comprises a gearbox 1, a coupler 2, a first generator 3, a tower 4, a fluid coupling 5, a driving device 6, a water tower 7, a water storage container 8, a first pipeline 9, a second pipeline 10, a water wheel 11 and a second generator 12.
Detailed Description
The present invention will now be described in further detail with reference to specific examples, which are intended to be illustrative, but not limiting, of the invention.
As shown in fig. 1, the invention discloses a wind turbine generator combining water pumping and energy storage with tower barrel resistance adding, which comprises an impeller, a main shaft, a gear box 1, a first generator 3, a speed-regulating hydraulic coupler 5, a driving device 6, a water tower 7, a water wheel 11, a second generator 12, a water storage container 8 and a control system; the impeller, the main shaft and the gear box 1 are sequentially connected, the gear box 1 is provided with two output ends, one output end is added to the gear box 1 on the basis that the impeller, the main shaft, the gear box 1, the generator and the like of a traditional wind turbine generator are unchanged, the two output ends are changed, one output end is connected with the first generator 3 through the coupler 2 and is the same as the traditional wind turbine generator; the other output is connected to a drive 6 via a fluid coupling 5. The hydraulic coupler 5 has larger loss and lower efficiency than the traditional mechanical coupler 2 in the aspect of torque transmission, so the gear box 1 and the first generator 3 are still connected by the coupler 2.
The control system is connected with the hydraulic coupler 5, and can control the opening and closing of the hydraulic coupler 5 according to requirements, so as to achieve the purpose of controlling the operation of the driving device 6.
The water tower 7 is arranged inside the tower barrel 4 and positioned at the top, the bottom of the water tower 7 is provided with a water outlet, and the top is provided with a water inlet; the water inlet is communicated with the water storage container 8 through the driving device 6, the water outlet is connected with the water storage container 8 through a pipeline, a water wheel 11 is arranged on the pipeline, the water wheel 11 is arranged at the bottom of the tower 4, and the water wheel 11 is connected with a second generator 12.
Specifically, the driving device 6 is disposed in the wind turbine nacelle at the top of the tower 4 and at the rear end of the gearbox 1. The driving device 6 generally adopts a hydraulic motor, the hydraulic motor is connected with a water storage container 8 arranged on one side of the tower drum 4 through a pipeline, and when the hydraulic motor operates, water in the water storage container 8 can be pumped to the top of the tower drum 4 and stored.
According to the invention, the water tower 7 is designed inside the top of the tower barrel 4, and the water tower 7 is arranged inside the top of the tower barrel 4 and is fixed with the inside of the tower barrel 4 through the fixing beam. The water tower 7 mainly has the following functions: firstly, the water pumped from the water storage container 8 to the water tower 7 by the hydraulic motor is stored, so that the potential energy of converting wind energy into water is stored; secondly, the water tower 7 after storing water can be used as a damper for the resistance of the tower drum 4, the amplitude of the top of the tower drum 4 can be effectively reduced, and the vibration of a cabin is reduced, so that the generating efficiency of a unit is improved.
The water wheel 11 generally adopts a turbine, water stored in the water tower 7 can be released to the bottom of the tower barrel 4 through a pipeline when needed, water flow pushes the turbine to rotate for power generation, stored energy is released, and meanwhile water in the water tower 7 flows back to the water storage container 8 to form recycling.
The hydraulic coupler 5 adopts a speed-regulating type hydraulic coupler, has a flexible transmission automatic adaptation function and a stepless speed regulation function, and can change the output torque and the output rotating speed by regulating the liquid filling amount of the working cavity in operation under the condition that the rotating speed of an input end is not changed. The output of the hydraulic motor is controlled by controlling the transmission of torque, i.e. the amount of charge in the working chamber of the fluid coupling 5, thereby controlling the amount of energy stored.
When the load end of the power grid is in high demand and needs a wind generating set to generate power in full force, the control system disconnects the hydraulic coupler 5, the hydraulic motor is separated from the gear box 1, the output end of the gear box 1 only has a generator, the wind generating set can generate power according to a normal wind generating set mode at the moment, and absorbed wind energy is completely converted into electric energy and is transmitted to the power grid.
When the load end of the power grid has no demand and the wind generating set is required to be stopped, the operation mode of energy storage can be switched, in the mode, the hydraulic coupler 5 is controlled to be closed, the hydraulic motor is connected with the gear box 1, in addition, the control system can set the stator exciting current of the first generator 3 to be zero, namely the rotor of the first generator 3 idles and does not generate electricity. In the mode, the energy of the impeller is transmitted to the gear box 1, the gear box 1 drives the generator and the hydraulic motor to operate through the coupler 2 and the fluid coupling 5, but the generator idles and does not generate electric energy, and the hydraulic motor operates to pump water in a container at the bottom of the tower 4 into a water tower 7 at the top of the tower 4. In this mode, the energy of the impeller is completely converted into potential energy of water to be stored, and when the potential energy of the water is needed subsequently, the water can be released from the water tower 7 and released to the turbine device at the bottom of the tower 4 through a pipeline, and the potential energy of the water is converted into electric energy to be transmitted to a power grid.
When the demand of a load end of a power grid is small and the limited demand is provided for the on-grid electric quantity of the wind generating set, the control system calculates the amount of energy generated by the wind generating set which needs to be converted into electric energy to be sent to the power grid, and the amount of energy which needs to be converted into water through water pumping and energy storage is stored. And then the excitation torque of the rotor is calculated by the control system, and the power output of the generator is controlled by the given rotor excitation torque. Meanwhile, the control system can control the speed regulation type hydraulic coupler 5, and the speed regulation type hydraulic coupler 5 can change the output torque and the output rotating speed by regulating the liquid filling amount of the working cavity in the running process under the condition that the rotating speed of the input end is not changed, so that the aim of controlling energy storage is fulfilled. In the mode, the energy of the impeller is transmitted to the generator and the hydraulic motor through the gear box 1, the exciting current of the stator of the generator and the liquid charging amount of the working cavity of the speed-regulating type hydraulic coupler 5 are controlled through the control system, and the aims of controlling the electric quantity output to a power grid by the fan and the water pumping and energy storing amount can be achieved.
Claims (10)
1. A wind turbine generator combining water pumping energy storage and tower barrel resistance adding is characterized by comprising an impeller, a main shaft, a gear box (1), a first generator (3), a hydraulic coupler (5), a driving device (6), a water tower (7), a water wheel (11), a second generator (12), a water storage container (8) and a control system;
the impeller, the main shaft and the gear box (1) are sequentially connected, the gear box (1) is provided with two output ends, one output end is connected with the first generator (3), and the other output end is connected with the driving device (6) through a hydraulic coupler (5);
the control system is connected with the hydraulic coupler (5) and is used for controlling the opening and closing of the hydraulic coupler (5) so as to control the operation of the driving device (6);
the water tower (7) is arranged inside the tower barrel (4) and positioned at the top, the bottom of the water tower (7) is provided with a water outlet, and the top is provided with a water inlet; the water inlet is communicated with the water storage container (8) through the driving device (6), the water outlet is connected with the water storage container (8) through a pipeline, a water wheel (11) is arranged on the pipeline, the water wheel (11) is arranged at the bottom of the tower barrel (4), and the water wheel (11) is connected with the second generator (12).
2. The wind turbine generator combining pumped storage and tower barrel drag according to claim 1, wherein the wind turbine generator comprises a normal power generation mode, an energy storage mode and a normal power generation and energy storage combined mode;
in the normal power generation mode, the wind energy is completely converted into electric energy;
in the energy storage mode, wind energy is completely converted into potential energy of water to be stored;
when the normal power generation and energy storage combined mode is used, one part of wind energy is converted into electric energy, and the other part of wind energy is converted into potential energy of water to be stored.
3. The wind turbine generator combining pumped storage and tower damping according to claim 1, characterized in that the drive device (6) is arranged in the wind turbine generator nacelle and is placed at the rear end of the gearbox (1).
4. The wind turbine generator combining pumped storage and tower damping according to claim 1, characterized in that one of the outputs of the gearbox (1) is connected to the first generator (3) via a coupling (2).
5. The wind turbine generator combining water pumping energy storage and tower barrel resistance increasing as claimed in claim 1, characterized in that the water tower (7) is fixed on the top of the tower barrel (4) through a fixing piece.
6. The wind turbine generator combining pumped storage and tower damping according to claim 1, characterized in that the drive means (6) is a hydraulic motor.
7. The wind turbine generator combining pumped storage and tower damping according to claim 1, wherein the water wheel (11) is a turbine.
8. The wind turbine generator combining water pumping energy storage and tower barrel resistance increasing as claimed in claim 1, wherein the hydraulic coupler (5) is a speed-adjustable hydraulic coupler.
9. The wind turbine generator combining water pumping energy storage and tower barrel resistance increasing as claimed in claim 1, characterized in that the water inlet is connected with the driving device (6) through a first pipeline (9), and the driving device (6) is connected with the water storage container (8) through a second pipeline (10).
10. The working method of the wind turbine generator set according to any one of claims 1 to 9, characterized by comprising the following conditions:
when the load end of the power grid is in large demand and needs the full power generation of the wind generating set, the wind generating set generates power according to a normal power generation mode, and the specific process is as follows:
the control system disconnects the hydraulic coupler (5), the driving device (6) and the gear box (1) are disconnected, the output end of the gear box (1) is only connected with the first generator (3), the wind turbine generator generates electricity according to a normal electricity generation mode, and absorbed wind energy is completely converted into electric energy;
when the load end of the power grid has no demand and needs the wind generating set to stop, the energy storage mode is switched to, and the specific process is as follows:
the control system controls the hydraulic coupler (5) to be closed, the driving device (6) is communicated with the gear box (1), the control system sets the stator exciting current of the first generator (3) to be zero, and the first generator (3) does not generate electricity; the energy of the impeller is transferred to the gear box (1), the gear box (1) drives the first generator (3) and the driving device (6) to operate, the first generator (3) does not generate electric energy when idling, the driving device (6) pumps water in the water storage container (8) into the water tower (7), the energy of the impeller is completely converted into potential energy of water to be stored, when the power grid is needed, the water in the water tower (7) is released, when the water passes through the water wheel (11), the potential energy of the water is converted into mechanical energy, and the water wheel (11) pushes the second generator (12) with the mechanical energy to generate electric energy;
when the demand of a load end of a power grid is small and the limited demand is provided for the on-grid electric quantity of the wind generating set, the mode of combining normal power generation and energy storage is switched, and the specific process is as follows:
the control system calculates the excitation torque of the rotor of the first generator (3) according to the requirement of a load end of a power grid, controls the power output of the first generator (3) through the given rotor excitation torque and converts part of wind energy into electric energy;
meanwhile, the control system controls the hydraulic coupler (5), the output torque and the output rotating speed of the hydraulic coupler (5) are changed, the driving device (6) pumps water in the water storage container (8) into the water tower (7), and the other part of wind energy is converted into potential energy of water to be stored.
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| CN116146408A (en) * | 2022-12-19 | 2023-05-23 | 芜湖凯博环保科技股份有限公司 | Continuous pumping energy storage power station based on wind power |
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