CN108894929B - Low wind speed stage fan and compressed air energy storage hybrid power generation system and control method - Google Patents

Low wind speed stage fan and compressed air energy storage hybrid power generation system and control method Download PDF

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Publication number
CN108894929B
CN108894929B CN201811020884.1A CN201811020884A CN108894929B CN 108894929 B CN108894929 B CN 108894929B CN 201811020884 A CN201811020884 A CN 201811020884A CN 108894929 B CN108894929 B CN 108894929B
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China
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wind speed
fan
power generation
storage tank
energy storage
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CN201811020884.1A
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CN108894929A (en
Inventor
文贤馗
邓彤天
钟晶亮
范强
张世海
王家胜
徐章福
王锁斌
吴宓
吴鹏
李前敏
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Guizhou Power Grid Co Ltd
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Guizhou Power Grid Co Ltd
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Classifications

    • 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
    • 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
    • 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
    • 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
    • F03D7/026—Controlling wind motors  the wind motors having rotation axis substantially parallel to the air flow entering the rotor for starting-up
    • 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
    • F03D7/0264—Controlling wind motors  the wind motors having rotation axis substantially parallel to the air flow entering the rotor for stopping; controlling in emergency situations
    • F03D7/0268—Parking or storm protection
    • 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
    • F03D9/17—Combinations of wind motors with apparatus storing energy storing energy in pressurised fluids
    • 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
    • F05B2260/00—Function
    • F05B2260/40—Transmission of power
    • F05B2260/403—Transmission of power through the shape of the drive components
    • F05B2260/4031—Transmission of power through the shape of the drive components as in toothed gearing
    • 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
    • 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
    • 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

Abstract

The invention discloses a low wind speed stage fan and compressed air energy storage hybrid power generation system and a control method, wherein the system comprises a fan (1) and a wind speed sensor, and an output rotating shaft of the fan (1) is connected with an input end of a meshing switching device (2); the first output end of the meshing switching device (2) is connected with the input end of the gear box (7), and the output end of the gear box (7) is connected with the input end of the wind driven generator; the second output end of the meshing switching device (2) is connected with the input end of the transmission mechanism (8), and the output end of the transmission mechanism (8) is connected with the input end of the compressor (4); the compressor (4) is connected with the air storage tank (5), and the air storage tank (5) is connected with the expansion generator; the problems that the wind turbine is not enough to start the wind turbine to generate electricity in a low wind speed stage, the wind turbine keeps a free idle state all the time, energy is wasted and the like are solved, the generated energy is increased, and the system efficiency and the power grid peak regulation capacity are improved.

Description

Low wind speed stage fan and compressed air energy storage hybrid power generation system and control method
Technical Field
The invention belongs to the technical field of electric power energy storage, and relates to a low-wind-speed stage fan and compressed air energy storage hybrid power generation system and a control method.
Background
With the increasing prominence of environmental protection problems, the energy supply tends to be tense, and wind power generation is taken as a clean renewable energy power generation mode and is increasingly welcomed and valued by people in all countries of the world. Meanwhile, wind power generation is one of the most mature and most scale development conditions in new energy power generation technology. Therefore, wind power generation industry in China has been rapidly developed in recent years.
In the running process of the fan, after the wind speed reaches the starting wind speed, a brake is turned on, the wind turbine generator is in a power generation allowing state, the generator can be connected with a grid (the variable pitch is in the optimal pitch angle), the automatic yaw input is realized, and the cooling system and the hydraulic system automatically run. At this time, the blades are in a free rotation state, but the wind speed is low, the cut-in wind speed is not reached (the stage before the wind speed reaches the cut-in wind speed is called a low wind speed stage after the wind speed reaches the starting wind speed), the wind turbine is not enough to start until the wind turbine generates electricity, the wind turbine generator is always kept in a free idle state, and the energy generated in the stage is wasted. Particularly, wind power generation in mountain areas of a plateau is realized, because of the air return characteristic of the mountain areas, the time that the fan is in a low-speed stage is longer, and the energy recovery in the stage can effectively improve the energy utilization rate.
The invention comprises the following steps:
the invention aims to solve the technical problems that: the wind turbine generator system is free to idle all the time and energy is wasted.
The technical scheme of the invention is as follows:
a low wind speed stage fan and compressed air energy storage hybrid power generation system comprises a fan and a wind speed sensor, wherein an output rotating shaft of the fan is connected with an input end of a meshing switching device; the first output end of the meshing switching device is connected with the input end of the gear box, and the output end of the gear box is connected with the input end of the wind driven generator; the second output end of the engagement switching device is connected with the input end of the transmission mechanism, and the output end of the transmission mechanism is connected with the input end of the compressor; the compressor is connected with the gas holder, and the gas holder is connected with the expansion generator.
The compressor is arranged at the top of the fan tower, the air storage tank is arranged inside the fan tower, and the expansion generator is arranged at the lower part of the fan tower.
A control method of a fan and compressed air energy storage hybrid power generation system in a low wind speed stage comprises the following steps:
step 1: acquiring real-time wind speed outside a fan cabin through a wind speed sensor;
step 2: comparing the collected real-time wind speed with the starting wind speed, and when the collected real-time wind speed is smaller than the starting wind speed, braking the fan and keeping a static state; when the acquired real-time wind speed is greater than the starting wind speed, entering a step 3;
step 3: when the collected real-time wind speed is greater than the starting wind speed, comparing the collected real-time wind speed with the cut-in wind speed, and when the collected real-time wind speed is greater than the cut-in wind speed, switching the fan to be connected with the gear box and the wind driven generator through the meshing switching device, wherein the fan enters a power generation state; when the acquired real-time wind speed is smaller than the cut-in wind speed, a brake of the wind turbine generator is started, the wind turbine generator is in an allowed running state, the variable pitch is in an optimal pitch angle, the automatic yaw input is realized, the cooling system and the hydraulic system automatically operate, the fan is switched to be connected with the transmission mechanism for operation through the meshing switching device, the operation rotating speed is increased through the speed increasing gear device, air enters the air storage tank after being compressed, and the air storage tank enters an energy storage state or an energy release power generation state according to whether the pressure of the air storage tank is higher than a threshold value.
And 3, according to whether the pressure of the air storage tank is higher than a threshold value, the judging method for entering the energy storage state or the energy release power generation state comprises the following steps: when the pressure of the air storage tank is lower than the threshold value, the compressed air energy storage system is only in an energy storage state; when the pressure of the air storage tank is higher than a threshold value, the compressed air energy storage system drives the expansion generator to enter an energy release power generation state.
The invention has the beneficial effects that:
according to the invention, the meshing switching device is used for switching, and the abandoned energy is stored and generated by utilizing the low wind speed stage of the wind turbine generator at the low wind speed, so that the problems that the wind turbine generator is not enough to start to generate electricity at the low wind speed stage, the wind turbine generator always keeps a free idle state, energy is wasted and the like are solved, the generated energy is increased, and the system efficiency and the power grid peak regulation capacity are improved.
The drawings in the specification:
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a flow chart of a control method of the present invention.
The specific embodiment is as follows:
a low wind speed stage fan and compressed air energy storage hybrid power generation system comprises a fan 1 and a wind speed sensor, wherein an output rotating shaft of the fan 1 is connected with an input end of a meshing switching device 2; the first output end of the meshing switching device 2 is connected with the input end of the gear box 7, and the output end of the gear box 7 is connected with the input end of the wind driven generator 3; the second output end of the meshing switching device 2 is connected with the input end of the transmission mechanism 8, and the output end of the transmission mechanism 8 is connected with the input end of the compressor 4; the gas output end of the compressor 4 is connected with the gas input end of the gas storage tank 5 through a pipeline, and the gas output end of the gas storage tank 5 is connected with the gas input end of the expansion generator 6 through a pipeline.
The engagement switching device 2 is a gear engagement switching device; the input end of the engagement switching device 2 is a movable switching gear mechanism, the first output end of the engagement switching device 2 is a gear mechanism, and the second output end of the engagement switching device 2 is also a gear mechanism.
When the acquired real-time wind speed is greater than the cut-in wind speed, the fan moves to be meshed with a gear mechanism at the first output end of the meshing switching device 2 through a movable switching gear mechanism at the input end of the meshing switching device 2, and a gear mechanism at the second output end far away from the meshing switching device 2 is not connected with the gear mechanism, so that the gearbox and the fan are driven to rotate;
when the acquired real-time wind speed is smaller than the cut-in wind speed, the fan moves to be connected with a gear mechanism at the second output end of the meshing switching device 2 through a movable switching gear mechanism at the input end of the meshing switching device 2, is far away from the gear mechanism at the first output end of the meshing switching device 2 and is not connected with the gear mechanism, and a transmission mechanism of the compressed air energy storage system is driven to rotate;
the transmission mechanism 8 is a gear box structure; the air storage device comprises a gear mechanism and a speed increasing gear device, when energy storage is needed, the fan is switched to be connected with the gear mechanism of the transmission mechanism through the meshing switching device, the gear mechanism drives the speed increasing gear device to increase the running rotating speed, and air enters the air storage tank after being compressed.
The compressor is arranged at the top of the fan tower, the air storage tank is arranged inside the fan tower, and the expansion generator is arranged at the lower part of the fan tower.
The control method of the fan and compressed air energy storage hybrid power generation system in the low wind speed stage comprises the following steps:
step 1: acquiring real-time wind speed outside a fan cabin through a wind speed sensor;
step 2: comparing the collected real-time wind speed with the starting wind speed, and when the collected real-time wind speed is smaller than the starting wind speed, braking the fan and keeping a static state; when the acquired real-time wind speed is greater than the starting wind speed, entering a step 3;
step 3: when the collected real-time wind speed is greater than the starting wind speed, comparing the collected real-time wind speed with the cut-in wind speed, and when the collected real-time wind speed is greater than the cut-in wind speed, switching the fan to be connected with the gear box and the wind driven generator through the meshing switching device, wherein the fan enters a power generation state; when the acquired real-time wind speed is smaller than the cut-in wind speed, a brake of the wind turbine generator is started, the wind turbine generator is in an allowed running state, the variable pitch is in an optimal pitch angle, the automatic yaw input is realized, the cooling system and the hydraulic system automatically operate, the fan is switched to be connected with the transmission mechanism for operation through the meshing switching device, the operation rotating speed is increased through the speed increasing gear device, air enters the air storage tank after being compressed, and the air storage tank enters an energy storage state or an energy release power generation state according to whether the pressure of the air storage tank is higher than a threshold value; and 3, according to whether the pressure of the air storage tank is higher than a threshold value, the judging method for entering the energy storage state or the energy release power generation state comprises the following steps: when the pressure of the air storage tank is lower than the threshold value, the compressed air energy storage system is only in an energy storage state; when the pressure of the air storage tank is higher than a threshold value, the compressed air energy storage system drives the expansion generator to enter an energy release power generation state.
And the meshing switching device and the wind speed sensor are used for acquiring the real-time wind speed outside the fan cabin and used as a criterion for switching and controlling different control modes. When the fan and the compressed air energy storage hybrid power generation system are switched to be connected with the wind driven generator according to criteria, the meshing switching device is switched to be connected with the gear box and the wind driven generator for realizing wind power generation.
When the fan and the compressed air energy storage hybrid power generation system are switched to be connected with the compressor according to criteria, the meshing switching device is switched to be connected with the 8 transmission mechanism, the compressor, the air storage tank and the expansion power generator for realizing energy storage or energy release power generation. Wherein, the transmission mechanism comprises a speed increasing gear device.

Claims (3)

1. The control method of the fan and compressed air energy storage hybrid power generation system in the low wind speed stage comprises a fan (1) and a wind speed sensor, and is characterized in that: the output rotating shaft of the fan (1) is connected with the input end of the meshing switching device (2); the first output end of the meshing switching device (2) is connected with the input end of the gear box (7), and the output end of the gear box (7) is connected with the input end of the wind driven generator; the second output end of the meshing switching device (2) is connected with the input end of the transmission mechanism (8), and the output end of the transmission mechanism (8) is connected with the input end of the compressor (4); the compressor (4) is connected with the air storage tank (5), and the air storage tank (5) is connected with the expansion generator; the control method comprises the following steps:
step 1: acquiring real-time wind speed outside a fan cabin through a wind speed sensor;
step 2: comparing the collected real-time wind speed with the starting wind speed, and when the collected real-time wind speed is smaller than the starting wind speed, braking the fan and keeping a static state; when the acquired real-time wind speed is greater than the starting wind speed, entering a step 3;
step 3: when the collected real-time wind speed is greater than the starting wind speed, comparing the collected real-time wind speed with the cut-in wind speed, and when the collected real-time wind speed is greater than the cut-in wind speed, switching the fan to be connected with the gear box and the wind driven generator through the meshing switching device, wherein the fan enters a power generation state; when the acquired real-time wind speed is smaller than the cut-in wind speed, a brake of the wind turbine generator is started, the wind turbine generator is in an allowed running state, the variable pitch is in an optimal pitch angle, the automatic yaw input is realized, the cooling system and the hydraulic system automatically operate, the fan is switched to be connected with the transmission mechanism for operation through the meshing switching device, the operation rotating speed is increased through the speed increasing gear device, air enters the air storage tank after being compressed, and the air storage tank enters an energy storage state or an energy release power generation state according to whether the pressure of the air storage tank is higher than a threshold value.
2. The control method of the low wind speed stage fan and compressed air energy storage hybrid power generation system according to claim 1, wherein the control method comprises the following steps: the compressor is arranged at the top of the fan tower, the air storage tank is arranged inside the fan tower, and the expansion generator is arranged at the lower part of the fan tower.
3. The control method of the low wind speed stage fan and compressed air energy storage hybrid power generation system according to claim 1, wherein the control method comprises the following steps: and 3, according to whether the pressure of the air storage tank is higher than a threshold value, the judging method for entering the energy storage state or the energy release power generation state comprises the following steps: when the pressure of the air storage tank is lower than the threshold value, the compressed air energy storage system is only in an energy storage state; when the pressure of the air storage tank is higher than a threshold value, the compressed air energy storage system drives the expansion generator to enter an energy release power generation state.
CN201811020884.1A 2018-09-03 2018-09-03 Low wind speed stage fan and compressed air energy storage hybrid power generation system and control method Active CN108894929B (en)

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CN115306642B (en) * 2022-08-31 2023-10-03 华能威宁风力发电有限公司 Single-machine wind power energy storage device for wind turbine generator
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CN116591888B (en) * 2023-06-12 2023-11-17 兰州华能生态能源科技股份有限公司 Energy storage device applied to clean energy comprehensive utilization

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