CN115405477A - Wind turbine generator system cabin integrated air-water cooling system and control method - Google Patents

Wind turbine generator system cabin integrated air-water cooling system and control method Download PDF

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Publication number
CN115405477A
CN115405477A CN202210798810.0A CN202210798810A CN115405477A CN 115405477 A CN115405477 A CN 115405477A CN 202210798810 A CN202210798810 A CN 202210798810A CN 115405477 A CN115405477 A CN 115405477A
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CN
China
Prior art keywords
cabin
pipeline
temperature
gear box
generator
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Pending
Application number
CN202210798810.0A
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Chinese (zh)
Inventor
陈通
吴炜
何俊尉
李亚
任旦元
陈中亚
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Zhejiang Windey Co Ltd
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Zhejiang Windey Co Ltd
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Publication date
Application filed by Zhejiang Windey Co Ltd filed Critical Zhejiang Windey Co Ltd
Priority to CN202210798810.0A priority Critical patent/CN115405477A/en
Publication of CN115405477A publication Critical patent/CN115405477A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
    • F03D80/60—Cooling or heating of wind motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D17/00—Monitoring or testing of wind motors, e.g. diagnostics
    • 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
    • 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
    • F03D80/30—Lightning 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
    • F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
    • F03D80/80—Arrangement of components within nacelles or towers
    • 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

Abstract

The invention discloses an integrated air-water cooling system of a wind turbine generator cabin, namely a control method, wherein the system comprises an extravehicular radiator and a pipeline, the extravehicular radiator comprises extravehicular radiating plates, the pipeline comprises extravehicular pipelines and intravehicular pipelines, the intravehicular pipelines are connected with a pump station, a water outlet of the pump station is provided with a valve body sensor element, the intravehicular pipelines are connected with a generator and a gear box, the pump station is connected with a heater, the intravehicular pipelines are connected with the extravehicular pipelines, and the extravehicular pipelines are connected with the extravehicular radiators. According to the integrated air-water cooling system for the wind turbine generator cabin, the generator and the gear box are connected in series through the pipeline, the radiator outside the cabin adopts natural air cooling, the generator and the gear box are cooled and combined into a set of system on the premise that manufacturability and reliability are not reduced, pump station configuration is saved, the design of electric parts outside the cabin and pipelines inside the cabin is optimized, the cabin is more compact, and the use efficiency of the cooling system of the wind turbine generator is improved.

Description

Wind turbine generator system cabin integrated air-water cooling system and control method
Technical Field
The invention relates to the technical field of wind generating sets, in particular to an integrated air-water cooling system of a wind generating set cabin and a control method.
Background
With the comprehensive entry of offshore wind power into the era of low-price online, the industry competition pressure is gradually increased, the megawatt of a wind turbine generator is continuously increased, the traditional air cooling technology (direct cooling or forced air cooling) generally adopted by land units below 7-8MW does not meet the cabin heat dissipation requirement any more, and the water cooling technology gradually becomes the main working mode for realizing cooling of large-capacity offshore units.
Because the offshore wind turbine has extremely high tightness requirements, the problem of heat management of large parts of the large megawatt wind turbine becomes one of the difficulties in the development of wind power technology, and the heat generated in the wind turbine is efficiently taken out of the engine room, which is one of the keys for improving the reliability of the wind turbine. In addition, the requirement of the offshore wind turbine is complex, functional requirements among components often conflict, how to organically combine a multi-component structure and meet multiple functions simultaneously is a test for the design of the existing wind turbine.
In a large megawatt double-fed unit cabin, heat is mainly generated from a generator and a gear box, the heat generated by the generator and the gear box is controlled in a centralized manner, the overall temperature level of the cabin is reduced, and an integrated efficient solution is not provided.
Disclosure of Invention
The invention provides an integrated air-water cooling system and a control method for a wind turbine generator room, aiming at overcoming the problem that the heat production of a generator and a gear box can not be controlled and processed in a centralized manner in the prior art so as to reduce the overall temperature of the room.
In order to achieve the purpose, the invention adopts the following technical scheme:
the integrated air-water cooling system for the engine room of the wind turbine generator comprises an extra-cabin radiator and a pipeline, wherein the extra-cabin radiator comprises an extra-cabin radiating plate, the pipeline comprises an extra-cabin pipeline and an extra-cabin pipeline, the extra-cabin pipeline is connected with a pump station, a water outlet of the pump station is provided with a valve body sensor element, the extra-cabin pipeline is connected with a generator and a gear box, the pump station is connected with a heater, the extra-cabin pipeline is connected with the extra-cabin pipeline, and the extra-cabin pipeline is connected with the extra-cabin radiator. According to the integrated air-water cooling system for the wind turbine generator cabin, the generator and the gear box are connected in series through the pipeline, the radiator outside the cabin adopts natural air cooling, and the generator and the gear box are cooled and combined into a set of system on the premise that the manufacturability and the reliability are not reduced, so that the configuration of a pump station is saved, the design of electric parts outside the cabin and pipelines inside the cabin is optimized, the cabin is more compact, and the use efficiency of the cooling system of the wind turbine generator is improved.
As a preferable scheme of the invention, the in-cabin pipeline comprises a generator mounting interface and a gearbox mounting interface, the generator mounting interface is connected with the generator through an air-water cooler inside the generator, and the gearbox mounting interface is connected with the gearbox through a gearbox oil-water heat exchanger. According to the wind turbine generator cabin integrated air-water cooling system, the generator and the gear box are connected in series through the pipeline, the cooling liquid is discharged from the power device of the pump station, firstly passes through the radiator outside the cabin, then passes through the air-water cooling device inside the generator, finally returns to the pump through the oil-water heat exchanger of the gear box, and the cooling liquid heated by the air-water cooler of the generator is then introduced into the oil-water heat exchanger of the gear box for stepped cooling, so that the equipment utilization efficiency of the water cooling system is improved.
As a preferable scheme of the invention, two ends of the generator mounting interface and two ends of the gear box mounting interface are respectively provided with a stop valve. The invention arranges the stop valves at the inlet and outlet of the generator and gear box of the pipeline in the cabin, when the generator and gear box are replaced by the unit, the cooling liquid of the water cooling system can be prevented from losing when the generator and gear box are replaced by the unit by only screwing the valve body.
As a preferable scheme of the invention, a power line pipeline and a lightning receiving line pipeline are arranged on the extravehicular pipeline, and the power line pipeline and the lightning receiving line pipeline are hard pipelines. The power line pipeline and the lightning receiving pipeline enable electrical appliance leads of electrical equipment such as an anemorumbometer, a small meteorological station assembly, an aviation warning lamp, a lightning protection facility and the like to enter the cabin.
As a preferred scheme of the invention, a plurality of mounting positions are arranged on the radiating plate outside the cabin, the mounting positions are used for mounting a lightning protection lightning rod, a wind measuring device and a micro meteorological station, and an aviation lamp mounting interface is also arranged on the radiating plate outside the cabin. The radiating plate outside the cabin adopts a natural air cooling mode, the anemoclinograph, the small meteorological station assembly, the aviation warning light and the lightning protection facility are integrated on the plate, the electrical wires of the equipment are connected and led into the cabin through the hard pipe, so that the sheet metal structural part of the unit is reduced, and the influence of the radiator outside the cabin on the anemometry system and the lightning protection system of the unit is eliminated.
As a preferable scheme of the invention, the system also comprises a plurality of cabin internal exhaust valves and a plurality of cabin external exhaust valves, wherein the cabin internal exhaust valves are arranged on the cabin internal pipeline, and the cabin external exhaust valves are arranged on the cabin external pipeline. The cabin internal exhaust valve is arranged at a relatively high position of an cabin internal pipeline in the engine cabin, such as a relatively high position of a gear box pipeline outlet and a generator pipeline outlet, and the cabin external exhaust valve is arranged at a relatively high position of an external cabin pipeline outside the engine cabin, so that the high position is prevented from forming air pockets, and the flowing of cooling liquid, heat exchange and the operation of a water pump are influenced.
As a preferable aspect of the present invention, the valve body sensor element is a three-way valve sensor element that controls a flow direction of the coolant according to an actual temperature of the coolant. The three-way valve sensor element may control whether to heat the coolant and whether to pass the coolant over the outboard fin based on the actual temperature of the coolant.
As a preferable aspect of the present invention, the cabin interior pipeline is fixed by a cabin interior truss. The configuration of fixed parts of pipelines in the engine room can be saved, the design of pipelines in the engine room is optimized, and the engine room is more compact.
Wind turbine generator system cabin integrated air-water cooling control method and packageComprises the following steps: when the unit is in a grid-connected state, a pump station of the water cooling system is started, at the moment, an interface of a three-way valve sensor element communicated with the outboard radiator is in a closed state, and cooling liquid does not flow through the outboard radiator; detecting the temperature of the cooling liquid at the outlet of the gear box, and when the temperature of the cooling liquid at the outlet of the gear box is more than or equal to T 0 When the temperature is higher than the preset temperature, starting a three-way valve sensor element to enable an interface of the three-way valve sensor element, which is communicated with the outboard radiator, to be in a conducting state, and cooling liquid flows through the outboard radiator to be cooled; until the temperature of the cooling liquid at the outlet of the gear box is less than or equal to T 0 Closing the three-way valve sensor element when the temperature is minus 10 ℃, so that an interface of the three-way valve sensor element, which is communicated with the outboard radiator, is in a closed state, and the cooling liquid does not flow through the outboard radiator; and when the unit is off-line for n minutes, closing a pump station of the water cooling system. According to the integrated air-water cooling control method for the wind turbine generator cabin, the pump station is started when the wind turbine generator is connected to the grid, the pump station is closed in a delayed mode after the grid is disconnected, the temperature of the cooling liquid is regulated and controlled through the heater and the three-way electromagnetic valve, the principle that the water cooling system is closed n minutes after the grid is disconnected is formulated for the problem of waste heat emission of the generator and the gearbox after the grid is disconnected, and the value n is adjusted according to actual grid connection time to prevent electricity waste.
As a preferred aspect of the present invention, the method further comprises: when the unit is in a non-grid-connected state, when the temperature of the cooling liquid at the outlet of the gear box is less than or equal to T h When the temperature is higher than the preset temperature, a pump station of the water cooling system is started, and a pump station heater is started to heat until the temperature of cooling liquid at the outlet of the gear box is higher than T h And when the temperature is +5 ℃, the heater of the pump station is closed, and the pump station of the water cooling system is closed. The invention discloses an integrated air-water cooling control method for a wind turbine generator room, which is used for starting a pump station when cooling liquid is at low temperature, and provides a method for controlling the temperature of the cooling liquid to be lower than T when the temperature of the cooling liquid is lower than T so as to prevent 'supercooling' of oil in a gear box caused by low temperature in a standby state in winter h The water pump and the heater are started.
As a preferred aspect of the present invention, the method further comprises: monitoring the temperature of the oil pool of the gear box, and when the temperature of the oil pool of the gear box exceeds T G Time, temperature T 0 Decrease in value of, T 0 The reduced value is N (T) Y -T G ) Therein is disclosedMiddle T Y For the temperature of the oil sump of the gearbox itself, T G N is a predetermined comparison value, and is a decreasing coefficient. When the temperature of the oil pool of the gear box exceeds the specified value, the three-way electromagnetic valve of the water cooling system reduces the temperature of switch control according to the temperature difference that the temperature of the oil pool of the gear box exceeds the specified value, so that the heat exchange temperature difference in the oil-water heat exchanger of the gear box is improved, and the heat exchange is enhanced. When the working condition occurs when the power of the gearbox is suddenly increased, the water cooling system is controlled to dissipate heat in advance to prevent thermal shock.
As a preferable aspect of the present invention, the method further comprises: monitoring the pressure value of the cooling liquid at the water inlet and/or the water outlet of the generator and/or the gear box in real time, and when the pressure value of the cooling liquid at the water inlet and/or the water outlet of the generator and/or the gear box is lower than P 1 When the pressure value of the cooling liquid at the water inlet and/or the water outlet of the generator and/or the gear box is lower than P, the system gives a warning prompt 2 And when the water cooling system pump station is closed. The invention carries out a secondary protection strategy on the return water pressure value of the system, which is lower than a set value P 1 Only make an alarm when the time is lower than the set value P 2 And performing shutdown protection to distinguish the response to different types of faults.
Therefore, the invention has the following beneficial effects: according to the integrated air-water cooling system for the wind turbine generator cabin, the generator and the gear box are connected in series through the pipeline, the radiator outside the cabin adopts natural air cooling, the generator and the gear box are cooled and combined into a set of system on the premise that the manufacturability and the reliability are not reduced, the configuration of a pump station is saved, the design of an electric component outside the cabin and the pipeline inside the cabin is optimized, the cabin is more compact, and the use efficiency of the cooling system of the wind turbine generator is improved; according to the integrated air-water cooling control method for the wind turbine generator cabin, the pump station is started when the wind turbine generator is connected to the grid, the pump station is closed in a delayed mode after the grid is disconnected, the temperature of the cooling liquid is regulated and controlled through the heater and the three-way electromagnetic valve, the principle that the water cooling system is closed n minutes after the grid is disconnected is formulated for the problem of waste heat emission of the generator and the gearbox after the grid is disconnected, and the value n is adjusted according to actual grid connection time to prevent electricity waste.
Drawings
FIG. 1 is a schematic view of a piping connection structure of the system of the present invention;
FIG. 2 is a schematic view of an outboard radiator construction of the present invention;
FIG. 3 is a schematic view of the outboard piping arrangement of the present invention;
fig. 4 is a schematic view of the piping structure inside the cabin of the present invention.
Fig. 5 is a control logic diagram of the control method of the water cooling system of the present invention.
In the figure: in the figure: 1. a first extra-cabin exhaust valve; 2. a first lightning protection lightning rod; 3. a first wind measuring device; 4. a first aviation light mounting interface; 5. a micro weather station; 6. a second lightning protection lightning rod; 7. a second aviation lamp mounting interface; 8. a second wind measuring device; 9. a third wind measuring device; 10. a second extra-cabin exhaust valve; 11. a third prevention Lei Jieshan rod; 12. a power line conduit; 13. a lightning conductor pipe; 14. a hose; 15. a generator mounting interface; 16. a gearbox mounting interface; 17. a stop valve; 18. a pump station water inlet; 19. and a water outlet of the pump station.
Detailed Description
The invention is further described with reference to the following detailed description and accompanying drawings.
An integrated air-water cooling system of a wind turbine generator cabin is shown in figure 1 and comprises an extravehicular radiator and pipelines, wherein the extravehicular radiator comprises extravehicular radiating plates, the pipelines comprise extravehicular pipelines and extravehicular pipelines, a pump station is connected to the intravehicular pipelines and connected with the extravehicular pipelines through a pump station water inlet 18 and a pump station water outlet 19 in the extravehicular pipelines, a valve body sensor element is arranged at a water outlet of the pump station, a generator and a gear box are connected to the intravehicular pipelines, a heater is connected to the pump station, the extravehicular pipelines are connected with the extravehicular pipelines, and the extravehicular pipelines are connected with the extravehicular radiators.
As shown in FIG. 4, the pipeline in the cabin comprises a generator mounting interface 15 and a gearbox mounting interface 16, the generator mounting interface 15 is connected with the generator through an air-water cooler in the generator, and the gearbox mounting interface 16 is connected with the gearbox through a gearbox oil-water heat exchanger. Stop valves 17 are respectively arranged at two ends of the generator mounting interface 15 and two ends of the gearbox mounting interface 16.
As shown in fig. 2, the heat dissipation plate outside the cabin is provided with a plurality of mounting positions, the mounting positions are used for mounting the lightning protection lightning rod, the wind measuring equipment and the micro weather station 5, and the heat dissipation plate outside the cabin is also provided with an aviation lamp mounting interface. Specifically, the top of the radiating plate outside the cabin is provided with three lightning protection lightning rods, including a first lightning protection lightning rod 2, a second lightning protection lightning rod 6 and a third lightning protection Lei Jieshan rod 11, and the top of the radiating plate outside the cabin is provided with three wind measuring devices, including a first wind measuring device 3, a second wind measuring device 8 and a third wind measuring device 9, the middle part of the top of the radiating plate outside the cabin is provided with two aviation lamp installation interfaces for installing an aviation lamp, including a first aviation lamp installation interface 4 and a second aviation lamp installation interface 7, and a miniature weather station 5 is arranged beside the wind measuring devices. As shown in fig. 3, a power line pipeline 12 and a lightning cable pipeline 13 are arranged on the extravehicular pipeline, and the power line pipeline 12 and the lightning cable pipeline are hard pipelines 13. The power line pipeline 12 and the lightning receiving pipeline 13 lead electrical equipment of the anemoclinograph, the small-sized meteorological station assembly, the aviation warning lamp, the lightning protection facility and the like into the cabin. Because the air-water cooling extravehicular heat exchanger has the function of blocking and interfering the wind flow, the wind measuring equipment is not placed at a proper position at the top of the nacelle cover; the lightning protection system is also the same, and the air-water cooled outdoor heat exchanger is the highest position of the whole cabin, and lightning protection needs to be protected from top to bottom. According to the invention, the wind measuring equipment and the lightning protection lightning rod are arranged at the upper part of the extravehicular heat exchanger and at the position shown in figure 2, so that the sheet metal structural part of the unit is reduced, and the influence of an extravehicular radiator on a wind measuring system and a lightning protection system of the unit is eliminated.
The system also comprises a plurality of cabin inner exhaust valves and a plurality of cabin outer exhaust valves, wherein the cabin inner exhaust valves are arranged on the cabin inner pipelines, and the cabin outer exhaust valves are arranged on the cabin outer pipelines. The in-cabin exhaust valve is arranged at a relatively high position of an in-cabin pipeline in the engine room, such as a relatively high position of a pipeline outlet of a gear box and a pipeline outlet of a generator, and the out-cabin exhaust valve is arranged at a relatively high position of an out-cabin pipeline outside the engine room, as shown in figure 2, the in-cabin exhaust valve comprises a first out-cabin exhaust valve 1 and a second out-cabin exhaust valve 10, so that cavitation is prevented from being formed at the high position, and flowing of cooling liquid, heat exchange and operation of a water pump are influenced.
The valve body sensor element is a three-way valve sensor element, and the three-way valve sensor element controls the flow direction of the cooling liquid according to the actual temperature of the cooling liquid. The three-way valve sensor element may control whether to heat the coolant and whether to pass the coolant over the outboard fin based on the actual temperature of the coolant.
The cabin pipeline is fixed through a truss inside the cabin.
The water cooling system pipeline mainly adopts a hard steel pipe connection form, the problem of assembly tolerance is solved by a small amount of hoses, the problems of pipeline fixation and assembly are solved, and the attractiveness is improved.
An integrated air-water cooling control method for a wind turbine generator cabin comprises the following steps: when the unit is in a grid-connected state, a pump station of the water cooling system is started, at the moment, an interface of a three-way valve sensor element communicated with the extravehicular radiator is in a closed state, and cooling liquid does not flow through the extravehicular radiator; detecting the temperature of the cooling liquid at the outlet of the gear box, and when the temperature of the cooling liquid at the outlet of the gear box is more than or equal to T 0 When the temperature is higher than the preset temperature, starting a three-way valve sensor element to enable an interface of the three-way valve sensor element, which is communicated with the outdoor radiator, to be in a conducting state, and cooling liquid flows through the outdoor radiator to be cooled; until the temperature of the cooling liquid at the outlet of the gear box is less than or equal to T 0 At-10 ℃, closing the three-way valve sensor element to enable the port of the three-way valve sensor element communicated with the extravehicular radiator to be in a closed state, wherein the cooling liquid does not flow through the extravehicular radiator; and when the unit is off-line for n minutes, closing a pump station of the water cooling system. Wherein T is 0 And the threshold temperature is manually and automatically set according to the running state of the wind turbine generator.
The integrated air-water cooling control method for the engine room of the wind turbine generator further comprises the following steps: when the unit is in a non-grid-connected state, when the temperature of the cooling liquid at the outlet of the gear box is less than or equal to T h When the temperature is higher than the preset temperature, a pump station of the water cooling system is started, and a pump station heater is started to heat until the temperature of cooling liquid at the outlet of the gear box is higher than T h And when the temperature is +5 ℃, the heater of the pump station is closed, and the pump station of the water cooling system is closed. The invention discloses an integrated air-water cooling control method for a wind turbine generator room, which is used for starting a pump station when cooling liquid is at low temperature, and provides a method for controlling the temperature of the cooling liquid to be lower than T when the temperature of the cooling liquid is lower than T so as to prevent 'supercooling' of oil in a gear box caused by low temperature in a standby state in winter h The water pump and the heater are started. Wherein T is h And the overcooling prevention threshold temperature is manually and automatically set according to the running state of the wind turbine generator.
The integrated air-water cooling control method for the engine room of the wind turbine generator further comprises the following steps: monitoring the temperature of the oil pool of the gear box, and when the temperature of the oil pool of the gear box exceeds T G Time, temperature T 0 Decrease in value of, T 0 The reduced value is N (T) Y -T G ) Wherein T is Y For the temperature of the oil sump of the gearbox itself, T G N is a predetermined comparison value, and is a decreasing coefficient. The numerical value of N is set according to the actual condition of the wind turbine generator, if N is 1, the temperature of an oil pool of the gear box exceeds T G Time, temperature T 0 The falling value of the gear box and the temperature of an oil pool of the gear box exceed T G Are equal in value. When the temperature of the oil pool of the gear box exceeds the specified value, the three-way electromagnetic valve of the water cooling system reduces the temperature of switch control according to the temperature difference that the temperature of the oil pool of the gear box exceeds the specified value, so that the heat exchange temperature difference in the oil-water heat exchanger of the gear box is improved, and the heat exchange is enhanced. When the working condition occurs when the power of the gearbox is suddenly increased, the water cooling system is controlled to dissipate heat in advance to prevent thermal shock.
The integrated air-water cooling control method for the engine room of the wind turbine generator further comprises the following steps: monitoring the pressure value of the cooling liquid at the water inlet and/or the water outlet of the generator and/or the gear box in real time, and when the pressure value of the cooling liquid at the water inlet and/or the water outlet of the generator and/or the gear box is lower than P 1 When the pressure value of the cooling liquid at the water inlet and/or the water outlet of the generator and/or the gear box is lower than P, the system gives out a warning prompt 2 And when the water cooling system pump station is closed. The invention carries out a secondary protection strategy on the return water pressure value of the system, which is lower than a set value P 1 Only make an alarm when the time is lower than the set value P 2 And performing shutdown protection to distinguish the response to different types of faults. Wherein P is 1 And P 2 The method comprises the steps of manually setting a first threshold pressure and a second threshold pressure according to the running state of the wind turbine generator.
The problem that prior art exists is that, the marine wind power generation unit cabin requires that the leakproofness is strong, and along with the power generation capacity promotes, the heat dissipation problem of generator and gear box becomes technical difficult point. The invention firstly provides a system for connecting water cooling pipelines of a generator and a gear box in series, and provides an efficient solution for heat dissipation of a machine cabin in an offshore large-capacity wind generating set.
In the embodiment, the integrated air-water cooling system for the engine room of the wind turbine generator comprises a pump station, an extravehicular radiator, a pipeline and a valve body sensor element, wherein the pipeline comprises an intravehicular pipeline and an extravehicular pipeline. The pump station, the extravehicular radiator, the generator air-water cooler and the gear box oil-water heat exchanger are connected in series through a water-cooling pipeline. The pump station is equipped with the heater, and pump station delivery port 19 department is equipped with the three-way valve, and the three-way valve can be according to actual temperature condition control whether heat the coolant liquid, whether make the coolant liquid through the outboard cooling plate piece, prevents to cool off inadequately and overcooling under the extreme temperature condition. The outdoor radiator adopts a natural air cooling mode, provides the installation positions of an anemoclinograph, a small meteorological station assembly, an aviation warning lamp and a lightning protection facility, leads the electrical wires of the equipment into the cabin through a hard pipe, and meets the requirements of wind measurement, lightning protection, prevention and control warning and the like of the unit. The pipeline of the system mainly adopts a mode of adding a small amount of flexible pipes into a hard steel pipe, valve bodies are arranged at the inlet and the outlet of the generator and the gear box, the pipeline is fixed by utilizing a cabin truss, and an exhaust device is arranged at a relatively high position in the cabin. The cooling liquid is discharged from a power device of the pump station, firstly passes through the radiator outside the cabin, then passes through the air-water cooler inside the generator, and finally returns to the pump station through the oil-water heat exchanger of the gear box. The cooling liquid heated by the generator air water cooler is then introduced into the gear box oil-water heat exchanger for stepped cooling, so that the equipment utilization efficiency of the water cooling system is improved. The pipeline in the cabin adopts a connection mode of a large number of hard pipes and a small number of hoses, and stop valves 17 are arranged at the inlet and outlet of the generator and the gear box, so that the influence of maintenance of most parts on a water cooling system is prevented. The water cooling pipeline is fixed by utilizing the truss inside the engine room, and the exhaust valve is arranged at a relatively high position, so that the influence of incomplete exhaust on the heat exchange of the gear box is weakened.
In this embodiment, as shown in fig. 1, the water-cooled pump station, the three-way valve, the outboard radiator, the generator, the gearbox, and the like are combined by piping.
Specifically, the pump station is the coolant pump with the water of certain flow and is sent to the three-way valve, and the three-way valve is judged according to the temperature of intaking whether to carry out inner loop/extrinsic cycle, and the coolant liquid can form the heat exchange through cabin outer radiator and outside air under the extrinsic cycle state to reduce self temperature, the liquid after the cooling gets into the inside air-water cooler of generator, cools off the inside air of generator. The liquid flows out from the outlet of the generator and has a certain temperature rise, the highest temperature in summer can reach 50 ℃, and at the moment, the liquid still has a large temperature difference (about 20 ℃) with the lubricating oil of the gearbox, and then the liquid enters the oil-water heat exchanger of the gearbox to reduce the temperature of the lubricating oil of the gearbox, so that the temperature of an oil pool of the gearbox is reduced.
The outdoor radiator adopts a natural cooling mode, so that the problems of self power consumption and outdoor power utilization are reduced, and in addition, the outdoor radiating sheet combines the meteorological sensor, the aviation warning lamp and the lightning protection lightning arrester at the same time, so that the problems of interference of the outdoor radiating sheet on the wind speed monitoring of the unit, shielding of light rays of the aviation lamp and lightning protection lightning arrester of the engine room are solved. As shown in FIG. 2, the structure can avoid function conflict and realize integrated multiple functions.
In practical use, as shown in the structure shown in fig. 3, power lines of a meteorological sensor and an aviation warning light are protected by a section of extra-cabin pipeline and are connected into an electric control cabinet of an engine cabin through a transition plate on an engine cabin cover; the lightning-induced line which is subjected to lightning is protected by another section of extra-cabin pipeline and is connected to the grounding point of the cabin through the transition plate on the cabin cover, so that the damage of lightning current to the extra-cabin heat exchanger and the cabin is avoided.
The generator and the gearbox are connected in series to bring the problem of pipeline complexity, and in order to avoid the problems of disorder of pipelines in the cabin and poor post-processing performance, the invention provides a pipeline using strategy taking a hard pipe as a main part and a hose 14 as an auxiliary part, and the detailed structure is shown in fig. 4. The shape of the hard pipe can be kept to the maximum extent, the hard pipe is easy to fix, and the influence of cabin vibration on hydraulic performance is avoided. The generator, the gear box, the pump station and the nearby interfaces of the outboard radiator adopt a plurality of sections of hoses, so that the problem of assembly tolerance of the water cooling system is solved.
In order to solve the interference with other functional components of the unit, the pipelines in the cabin may form a bulge at the middle connecting section, so that a low-high-low pipeline structure is formed, and air pockets which are difficult to remove are generated at a local high position. This embodiment adopts manual discharge valve at the relative high level of gear box export, with the gaseous discharge of high level when the debugging of first water injection, prevents that gas from getting into gear box and the inside heat exchanger of generator, influences heat exchange efficiency to prevent that the water pump body from producing the cavitation erosion, improve its operating stability.
It is important to use a control method to integrate the requirements of the generator and the gearbox with respect to their different characteristics. The invention provides the following water cooling system control logic, as shown in fig. 5. In this embodiment, an integrated air-water cooling control method for a wind turbine generator room includes:
1) And when the unit is in a grid-connected state, starting the water-cooling pump station. And after the unit is off-line for n minutes, the water-cooled pump station is closed in a delayed mode and used for emitting waste heat.
2) When the unit is in a grid-connected state, a pump station of the water cooling system is started, the cooling liquid does not pass through an extra-cabin radiator initially, and when the temperature of the cooling liquid at the outlet of the gear box reaches T 0 When the temperature of the cooling liquid is lower than T, the three-way electromagnetic valve is started to cool the cooling liquid through the outside of the cabin 0 And closing the three-way electromagnetic valve at the temperature of minus 10 ℃.
3) When the unit is in a non-grid-connected state, the outlet temperature of the gear box is lower than T h When the temperature is higher than the preset temperature, a pump station of the water cooling system is started, and a heater of the pump station is started, so that the temperature of the cooling liquid of the unit reaches T DEG C h Above +5 ℃.
4) Simultaneously monitoring the temperature and pressure values of the inlet and the outlet of the generator and the gearbox and the system flow value, and performing a secondary protection strategy on the system return water pressure value which is lower than a set value P 1 Only make an alarm when the time is lower than the set value P 2 And performing shutdown protection to distinguish the response to different types of faults.
When the temperature of the oil pool of the gear box exceeds the specified value, the three-way electromagnetic valve of the water cooling system reduces the temperature of switch control according to the temperature difference that the temperature of the oil pool of the gear box exceeds the specified value, so that the heat exchange temperature difference in the oil-water heat exchanger of the gear box is improved, and the heat exchange is enhanced. When the working condition occurs when the power of the gearbox is suddenly increased, the water cooling system is controlled to dissipate heat in advance to prevent thermal shock.
The invention sets a strategy for starting a water cooling system when a unit is connected to the power grid according to the grid connection requirement of a generator, and provides a strategy for preventing the oil of a gear box from being supercooled when the temperature of a cooling liquid is lower than T in order to prevent the oil of the gear box from being supercooled when the temperature of a standby state is low in winter h The water pump, i.e. the pump station and the heater, is started. Aiming at the problem of waste heat emission of the generator and the gearbox after the grid disconnection, a principle of closing the water cooling system n minutes after the grid disconnection is established, and the value of n is adjusted according to the actual grid connection time to prevent electricity waste.
In order to prevent the lubricating oil of the gear box from being reduced due to the fact that the lubricating oil of the gear box is excessively cooled by a water cooling system, the invention provides a mode of switching internal circulation and external circulation by a three-way valve, wherein the internal circulation is that cooling liquid does not pass through an extravehicular radiator for heat dissipation, and the external circulation is that the cooling liquid passes through the extravehicular radiator for heat dissipation, so that the interference of an external environment on the cooling system is weakened. When the outlet temperature of the gearbox is higher than T 0 When the temperature of the cooling liquid is higher, the temperature difference in the oil-water heat exchanger of the gear box is smaller, and the oil of the gear box is prevented from being supercooled; when the outlet temperature of the gearbox is lower than T 0 And when the temperature is below 10 ℃ below zero, the three-way valve is switched to the internal circulation to heat the cooling liquid in the system and reduce the temperature difference of the oil-water heat exchanger of the gearbox.
In addition, aiming at the problem of low leakage and pressure of the system, the invention provides a two-stage pressure protection strategy, and when the backwater pressure is lower than P 1 In time, the unit only alarms, and maintenance personnel are required to supplement cooling liquid, so that the accessibility of offshore maintenance is fully considered. At a return water pressure lower than the lower pressure P 2 And when the machine set alarms and stops, the machine set is indicated to have serious liquid leakage faults and needs to be processed in time, so that other systems in the cabin are protected from being damaged.
In addition, the system is also provided with flow monitoring, the working state of the field device is verified in real time, and the target design value is matched.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that are not thought of through the inventive work should be included in the scope of the present invention.

Claims (10)

1. The integrated air-water cooling system for the engine room of the wind turbine generator is characterized by comprising an extra-cabin radiator and a pipeline, wherein the extra-cabin radiator comprises an extra-cabin radiating plate, the pipeline comprises an extra-cabin pipeline and an extra-cabin pipeline, the extra-cabin pipeline is connected with a pump station, a water outlet of the pump station is provided with a valve body sensor element, the extra-cabin pipeline is connected with a generator and a gear box, the pump station is connected with a heater, the extra-cabin pipeline is connected with the extra-cabin pipeline, and the extra-cabin pipeline is connected with the extra-cabin radiator.
2. The integrated air-water cooling system for the wind turbine generator cabin according to claim 1, wherein the cabin pipeline comprises a generator mounting interface and a gearbox mounting interface, the generator mounting interface is connected with a generator through an internal generator air-water cooler, the gearbox mounting interface is connected with a gearbox through a gearbox oil-water heat exchanger, and the cabin pipeline is fixed through an internal cabin truss.
3. The integrated air-water cooling system of the wind turbine generator room as claimed in claim 2, wherein two ends of the generator mounting interface and two ends of the gear box mounting interface are respectively provided with a stop valve.
4. The integrated air-water cooling system for the wind turbine generator cabin according to claim 1, wherein a power line pipeline and a lightning wire receiving pipeline are arranged on the extra-cabin pipeline, and the power line pipeline and the lightning wire receiving pipeline are hard pipelines.
5. The integrated air-water cooling system for the engine room of the wind turbine generator set as claimed in claim 3 or 4, wherein a plurality of installation positions are arranged on the radiating plate sheet outside the engine room, the installation positions are used for installing a lightning protection lightning rod, a wind measuring device and a micro weather station, and an aviation lamp installation interface is further arranged on the radiating plate sheet outside the engine room.
6. The integrated air-water cooling system for the wind turbine generator system cabin according to claim 1, further comprising a plurality of cabin interior exhaust valves and a plurality of cabin exterior exhaust valves, wherein the cabin interior exhaust valves are arranged on the cabin interior pipeline, the cabin exterior exhaust valves are arranged on the cabin exterior pipeline, the valve body sensor element is a three-way valve sensor element, and the three-way valve sensor element controls the flow direction of the cooling liquid according to the actual temperature of the cooling liquid.
7. An integrated air-water cooling control method for a wind turbine generator room is applicable to the integrated air-water cooling system for the wind turbine generator room as claimed in any one of claims 1 to 6, and is characterized by comprising the following steps:
when the unit is in a grid-connected state, a pump station of the water cooling system is started, at the moment, an interface of a three-way valve sensor element communicated with the outboard radiator is in a closed state, and cooling liquid does not flow through the outboard radiator; detecting the temperature of the cooling liquid at the outlet of the gear box, and when the temperature of the cooling liquid at the outlet of the gear box is more than or equal to T 0 When the temperature is higher than the preset temperature, starting a three-way valve sensor element to enable an interface of the three-way valve sensor element, which is communicated with the outboard radiator, to be in a conducting state, and cooling liquid flows through the outboard radiator to be cooled; until the temperature of the cooling liquid at the outlet of the gear box is less than or equal to T 0 Closing the three-way valve sensor element when the temperature is minus 10 ℃, so that an interface of the three-way valve sensor element, which is communicated with the outboard radiator, is in a closed state, and the cooling liquid does not flow through the outboard radiator; and when the unit is off-line for n minutes, closing a pump station of the water cooling system.
8. The wind turbine generator room integrated air-water cooling control method according to claim 7, further comprising:
when the temperature of the cooling liquid at the outlet of the gear box is less than or equal to T when the unit is in a non-grid-connected state h When the temperature is higher than the preset temperature, a pump station of the water cooling system is started, and a pump station heater is started to heat until the temperature of cooling liquid at the outlet of the gear box is higher than T h At +5 deg.C, the pump station heater is turned off, and water cooling is carried outThe pumping station of the system is closed.
9. The integrated air-water cooling control method for the wind turbine generator room as claimed in claim 7, further comprising: monitoring the temperature of the oil pool of the gear box, and when the temperature of the oil pool of the gear box exceeds T G Time, temperature T 0 Decrease in value of, T 0 The reduced value is N (T) Y -T G ) Wherein T is Y Is the temperature of the oil sump of the gearbox itself, T G N is a predetermined comparison value, and is a decreasing coefficient.
10. The integrated air-water cooling control method for the wind turbine generator room as claimed in claim 7, 8 or 9, further comprising:
monitoring the pressure value of the cooling liquid at the water inlet and/or the water outlet of the generator and/or the gear box in real time, and when the pressure value of the cooling liquid at the water inlet and/or the water outlet of the generator and/or the gear box is lower than P 1 When the pressure value of the cooling liquid at the water inlet and/or the water outlet of the generator and/or the gear box is lower than P, the system gives a warning prompt 2 And when the water cooling system pump station is closed.
CN202210798810.0A 2022-07-06 2022-07-06 Wind turbine generator system cabin integrated air-water cooling system and control method Pending CN115405477A (en)

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CN202210798810.0A CN115405477A (en) 2022-07-06 2022-07-06 Wind turbine generator system cabin integrated air-water cooling system and control method

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116232176A (en) * 2023-05-10 2023-06-06 南京讯联液压技术股份有限公司 Water-cooling intelligent control system for wind power gearbox and generator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116232176A (en) * 2023-05-10 2023-06-06 南京讯联液压技术股份有限公司 Water-cooling intelligent control system for wind power gearbox and generator
CN116232176B (en) * 2023-05-10 2023-07-04 南京讯联液压技术股份有限公司 Water-cooling intelligent control system for wind power gearbox and generator

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