CN114294187A - Blade heating control system and method for wind driven generator - Google Patents
Blade heating control system and method for wind driven generator Download PDFInfo
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- CN114294187A CN114294187A CN202111525036.8A CN202111525036A CN114294187A CN 114294187 A CN114294187 A CN 114294187A CN 202111525036 A CN202111525036 A CN 202111525036A CN 114294187 A CN114294187 A CN 114294187A
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The invention discloses a blade heating control system and method of a wind driven generator, and the blade heating control system comprises a blade heating main control system, a blade control box, a main shaft slip ring and a blade heater, wherein the blade heating main control system is electrically connected with the blade control box through the main shaft slip ring, the number of the blade control box and the number of the blade heater are three, and one blade control box controls one blade heater. The invention adopts distributed installation through a control technology of thermal deicing, and is used when the space of a blade hub or even a cabin is too compact and cannot provide a complete control system installation space.
Description
Technical Field
The invention relates to the technical field of wind power generation, in particular to a system and a method for controlling heating of a blade of a wind driven generator.
Background
1. Reasons for icing of wind turbine blades
Wind power generators are generally arranged in high mountains and frontier areas, and the areas are cold in winter and have high humidity. In such a high humidity, low temperature environment, there are a large number of supercooled droplets at temperatures below 0 ℃, which are in a metastable state. When the blade rotates in the ice-coating cloud layer, the supercooled liquid drops impact on the surface of the blade in the falling process, the stable state of the supercooled liquid drops is broken through the impact, the interior of the liquid drops forms a self-growing ice nucleus, and the liquid drops are rapidly frozen to cause the blade to be coated with ice.
2. The icing on the surface of the fan blade mainly has the following effects:
1) the power generation efficiency of the wind generating set will be reduced;
2) the life of the wind turbine will be reduced;
3) the ice coating on the blades falls off to cause damage to people, livestock, equipment and the like around.
3. Deicing method
At present, the main anti-icing and deicing technologies include thermal deicing, mechanical deicing, coating deicing and the like.
Disclosure of Invention
Aiming at the defects in the prior art, the heating control system for the blades of the wind driven generator provided by the invention solves the problem that the space of a blade hub and even a cabin is too compact and cannot provide the installation space of a complete control system.
In order to achieve the purpose of the invention, the invention adopts the technical scheme that: a blade heating control system of a wind driven generator comprises a blade heating main control system, a blade control box, a main shaft slip ring and blade heaters, wherein the blade heating main control system is electrically connected with the blade control box through the main shaft slip ring, the number of the blade control box and the number of the blade heaters are three, and one blade control box controls one blade heater.
Further: the blade heating master control system comprises a system power distribution module and a control module, wherein the control module comprises an operation unit, a display setting unit, a remote transmission interface and a communication port.
Further: the blade control box comprises a blade controller, a heating drive, a blowing drive, a temperature sensor and a protection switch port, wherein the heating drive and the blowing drive are both connected with a signal input end of the blade heater, a signal output end of the blade heater is connected with the protection switch port of the blade controller through a protection switch, and the blade temperature sensor is connected with the signal input end of the blade controller.
Further: the blade heater comprises a heating device and an air supply device, a hot air channel is formed in the blade to complete heating, the heating device is connected with a heating drive, and the air supply device is connected with an air blowing drive.
Further: the main shaft slip ring provides a communication line channel and a power supply line channel, the control module is connected with the blade controller through a communication line, and the system power distribution module is connected with the heating drive and the blowing drive through a power supply line.
Further: the communication line channel is RS485 or CAN communication and is used for feeding back data detected by the blade control box to the blade heating main control system and sending a heating start-stop instruction made by the blade heating main control system to the blade control box.
Further: the power supply line channel provides a three-phase 400V power supply, a 690V power supply or a single-phase 230V power supply according to the power supply type of the wind turbine generator or the power demand of the blade heater.
Further: the blade heating main control system can be installed inside a cabin or on a tower foundation platform.
A wind driven generator blade heating control method comprises the following steps:
s1, supplying power to the whole system through the blade heating main control system: after the system is powered on, the blade heating control system starts to work, meanwhile, a power supply line supplies power to the blade control box through the main shaft slip ring, and a controller in the blade control box also starts to work;
s2, the blade control box detects the internal temperature of the blade in real time through an external temperature sensor, and the state detection switch detects whether the heater is overheated, the fan is in failure, and the fire protection switch signal is normal;
s3, the blade heating master control system reads the temperature data and the protection switch state in the blade control box through the communication line channel for the control logic and display;
s4, comparing the temperature data read from the blade control box with the heating start temperature and the heating stop temperature data set in the blade heating main control system by the blade heating main control system, and making a heater start and stop operation logic command after confirming the switch state in the blade control box; then sending heater start and stop instructions to the blade control box through a communication line channel;
s5, the blade controller in the blade control box makes the blade heater start and stop driving actions after receiving the instruction of the blade heating main control system:
s6, start operation: firstly, starting a blower to operate, starting a heating device after an air duct is established, and blowing hot air out by a blade heater;
s7, stop operation: firstly, stopping a heating device, and stopping the operation of the blower after the surface temperature of the heating device is reduced to avoid the internal temperature of the heater from being overheated;
and S8, in the heating process, if the signals of the blade heating main control system are not received for a long time, the communication line is considered to be in fault, and the blade control box makes an automatic shutdown action.
The invention has the beneficial effects that: the invention adopts distributed installation by a control technology of thermal deicing, and is particularly suitable for being used when the space of a blade hub or even an engine room is too compact and cannot provide a complete control system installation space; the invention is also characterized in that a communication technology is adopted between the blade heating main control system and the blade controller, an overheating protection switch, a fire protection switch, a fault detection switch, a heating drive switch, a blowing drive switch and an analog quantity temperature signal are used in 3 blade heaters, all data transmission can be completed by only one group of communication lines, the manufacturing difficulty of the main shaft slip ring is avoided, and the reliability and the cost performance of the system are improved.
Drawings
FIG. 1 is a block diagram of the system of the present invention.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the invention as defined and defined in the appended claims, and all matters produced by the invention using the inventive concept are protected.
As shown in fig. 1, the blade heating control system of the wind driven generator is characterized by comprising a blade heating main control system, blade control boxes, a spindle slip ring and blade heaters, wherein the blade heating main control system is electrically connected with the blade control boxes through the spindle slip ring, the number of the blade control boxes and the number of the blade heaters are three, and one blade control box controls one blade heater.
1) Blade heating master control system: the unit cabin can be installed inside the cabin when the space is abundant, and the cabin can be installed on a tower footing platform when the cabin cannot be installed:
1.1) if the system is arranged in the cabin, if the power distribution in the cabin is sufficient, the system power supply can be taken from the cabin, otherwise, the power is taken by a tower footing power distribution system; if the power generation device is arranged at the position of the tower base, the power can be directly taken at the tower base.
And 1.2) the blade heating master control system consists of a system power distribution module and a control module, wherein the control module consists of an arithmetic unit, a display setting unit, a remote transmission interface and a communication port.
1.3) an arithmetic unit: the control core, the operation core and the start-stop control.
1.4) a display setting unit: the method is used for displaying the system running state and setting the control parameters.
1.5) remote transmission interface: the running state and the fault state of the machine heating system are transmitted to the external system, and the command of the external system can be transmitted to the heating system (for example, the heating system is shut down during the shutdown period of the unit, so that the energy consumption is avoided).
2) A wind power plant typically has 3 sets of blades, so the blade heating system consists of 3 blade heaters. The 3 blade heaters have respective control boxes:
2.1) the blade heater is composed of a heating device and an air supply device: a hot air channel is formed in the blade to complete heating, and the driving of the heater and the blower is provided by the control box.
2.2) the blade control box is except providing heating, the drive of blowing, still possesses temperature sensor and protection switch port, realizes that temperature detects and heater overheat, fan trouble, fire control protection switch state detect in the blade.
3) The blade heating main control system and the blade heater control box are electrically connected through a main shaft slip ring of the unit:
3.1) slip ring provides communication line channel: for example, RS485 or CAN communication is used for feeding back data detected by the blade control box to the blade heating main control system, and a heating start-stop instruction made by the blade heating main control system CAN also be sent to the blade heating control box;
3.2) slip ring provides power supply circuit channel: according to the type of power supply of the wind turbine generator or the power demand of the blade heater, a three-phase 400V power supply, a 690V power supply or a single-phase 230V power supply can be provided.
4) Working process of the invention
4.1) the system supplies power to the whole system through the blade heating master control system: after the system is powered on, the blade heating control system starts to work, meanwhile, a power supply line supplies power to the blade control box through the main shaft slip ring, and a controller in the blade control box also starts to work;
4.2) the blade control box detects the internal temperature of the blade in real time through an external temperature sensor, and detects whether the heater is overheated, the fan is in failure and the fire protection switch signal is normal through a state detection switch;
4.3) the blade heating master control system reads the temperature data and the protection switch state in the blade control box through a communication line channel for control logic and display;
4.4) the blade heating master control system compares the temperature data read from the blade control box with the heating starting temperature and the heating stopping temperature data set in the blade heating master control system, and makes a heater starting and stopping operation logic command after confirming the switching state in the blade control box; then sending heater start and stop instructions to the blade control box through a communication line channel;
4.5) the controller in the blade control box makes the blade heater start and stop driving actions after receiving the instruction of the blade heating main control system:
4.5.1) start action: firstly, starting a blower to operate, starting a heating device after an air duct is established, and blowing hot air out by a blade heater;
4.5.2) stop action: firstly, stopping a heating device, and stopping the operation of the blower after the surface temperature of the heating device is reduced to avoid the internal temperature of the heater from being overheated;
4.5.3) in the heating process, if the signals of the blade heating main control system are not received for a long time, the communication line is considered to be in fault, and the blade control box makes an automatic shutdown action.
Claims (9)
1. The utility model provides a aerogenerator blade heating control system, its characterized in that includes blade heating master control system, blade control box, main shaft sliding ring and blade heater, accomplish electric connection through the main shaft sliding ring between blade heating master control system and the blade control box, blade control box and blade heater all have three, one blade control box control a blade heater.
2. The wind turbine blade heating control system of claim 1, wherein the blade heating master control system comprises a system power distribution module and a control module, and the control module comprises an arithmetic unit, a display setting unit, a remote transmission interface and a communication port.
3. The wind turbine blade heating control system according to claim 1, wherein the blade control box comprises a blade controller, a heating driver, a blowing driver, a temperature sensor and a protection switch port, the heating driver and the blowing driver are both connected with a signal input end of the blade heater, a signal output end of the blade heater is connected with the protection switch port of the blade controller through a protection switch, and the blade temperature sensor is connected with the signal input end of the blade controller.
4. The blade heating control system of the wind driven generator as claimed in claim 3, wherein the blade heater comprises a heat generating device and an air blowing device, a hot air duct is formed in the blade to complete heating, the heat generating device is connected with a heating drive, and the air blowing device is connected with an air blowing drive.
5. The aerogenerator blade heating control system as defined in claim 4, wherein the main shaft slip ring provides communication line and power line channels, the control module is connected to the blade controller through a communication line, and the system power distribution module is connected to the heating drive and the blowing drive through a power line.
6. The wind turbine blade heating control system according to claim 5, wherein the communication line channel is RS485 or CAN communication, and the data detected by the blade control box is fed back to the blade heating main control system, and the heating start-stop instruction made by the blade heating main control system CAN also be sent to the blade control box.
7. The aerogenerator blade heating control system as defined in claim 5, wherein the power supply line channel provides a three-phase 400V, 690V power or a single-phase 230V power depending on the type of wind turbine power or the power demand of the blade heater.
8. The aerogenerator blade heating control system of claim 1 wherein the blade heating master control system is mountable inside a nacelle or on a tower-based platform.
9. A wind driven generator blade heating control method is characterized by comprising the following steps:
s1, supplying power to the whole system through the blade heating main control system: after the system is powered on, the blade heating control system starts to work, meanwhile, a power supply line supplies power to the blade control box through the main shaft slip ring, and a controller in the blade control box also starts to work;
s2, the blade control box detects the internal temperature of the blade in real time through an external temperature sensor, and the state detection switch detects whether the heater is overheated, the fan is in failure, and the fire protection switch signal is normal;
s3, the blade heating master control system reads the temperature data and the protection switch state in the blade control box through the communication line channel for the control logic and display;
s4, comparing the temperature data read from the blade control box with the heating start temperature and the heating stop temperature data set in the blade heating main control system by the blade heating main control system, and making a heater start and stop operation logic command after confirming the switch state in the blade control box; then sending heater start and stop instructions to the blade control box through a communication line channel;
s5, the blade controller in the blade control box makes the blade heater start and stop driving actions after receiving the instruction of the blade heating main control system:
s6, starting a blower of the blade heater to operate, starting a heating device after an air duct is established, and blowing hot air out of the blade heater;
s7, stopping heating the device, and stopping the blower from running after the surface temperature of the device to be heated is reduced so as to avoid the internal temperature of the heater from being overheated;
and S8, in the heating process, if the signals of the blade heating main control system are not received for a long time, the communication line is considered to be in fault, and the blade control box makes an automatic shutdown action.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111525036.8A CN114294187A (en) | 2021-12-14 | 2021-12-14 | Blade heating control system and method for wind driven generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111525036.8A CN114294187A (en) | 2021-12-14 | 2021-12-14 | Blade heating control system and method for wind driven generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114294187A true CN114294187A (en) | 2022-04-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111525036.8A Pending CN114294187A (en) | 2021-12-14 | 2021-12-14 | Blade heating control system and method for wind driven generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114294187A (en) |
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2021
- 2021-12-14 CN CN202111525036.8A patent/CN114294187A/en active Pending
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