Wind turbine blade icing sector anti-smashing protection method, system, medium and equipment

Abstract

The application discloses a wind turbine blade icing sector anti-throw protection method and system, a storage medium and a computing device. The method adds an icing sector protection strategy in the original main control program of the unit. When the main control detects that the blade is icing, the icing sector protection strategy needs to be executed, the yaw system of the unit is controlled to execute corresponding actions to ensure that the blade has deviated from the ground equipment directly above, and different actions are executed according to actual wind conditions to achieve the purpose of protecting the blade and the ground equipment at the same time. The application adds the main control program in the routine operation of the unit, deviates the blade from the ground equipment directly above based on the yaw system of the unit, and the required related signals already exist in the unit itself, without the need of additional hardware, so that the automatic detection and elimination of the risk of ice block falling and damaging the equipment below the unit in winter routine maintenance can be realized.

Description

Technical Field

[0001] This invention relates to the technical field of wind power generation, and in particular to a method, system, storage medium, and computing device for preventing icing in the blade sector of a wind turbine. Background Technology

[0002] With the increasing deployment of wind turbines (also known as wind girders) in northern regions, the occurrence of blade icing during the cold winter months is also increasing. Consequently, the likelihood of ice buildup on the turbine blades falling and damaging equipment on the ground is also rising. In some special cases, the ice buildup can be so thick and heavy that it can easily damage equipment. Currently available blade icing protection technologies mostly focus on detecting whether the blades are icy or removing the ice from the blades, but they do not protect the safety of ground equipment beneath the icy blades.

[0003] For example, Chinese invention patent CN207538980U discloses a wind turbine blade icing detection device. The device includes a condenser microphone, an audio amplifier circuit, a filter, a processor, a display, and a memory. It diagnoses the icing condition of wind turbine blades by detecting the noise of the rotating wind turbine blades. It can be made into a handheld detection device or integrated into the control strategy of the wind turbine unit. Compared with conventional detection devices, it has good adaptability and is simple and easy to implement.

[0004] Chinese invention patent CN105856586B discloses a graphene electrothermal film wind turbine blade icing protection system. This invention relates to a graphene electrothermal film wind turbine blade icing protection system employing a graphene-epoxy fiberglass laminate structure: a blade outer skin layer is laid on the mold surface, and a graphene electrothermal film is coated on the surface of the blade outer skin layer. A narrow, continuously heated graphene electrothermal film is arranged between the leading edge and spanwise sections of the wind turbine blade, while periodically heated graphene electrothermal films are arranged in other areas. The blade layer structure continues to be laid, and after the blade shell is fully laminated, vacuum auxiliary materials are laid. Epoxy resin is used as the resin matrix for vacuum infusion and curing of the blade shell, forming the blade icing protection system. This invention can effectively prevent the graphene electrothermal film from being exposed to the external environment and thus prevent graphene electrothermal film failure. Different heating powers are used in different sections of the wind turbine blade, effectively improving the performance of the de-icing system.

[0005] Therefore, existing technologies related to blade icing all focus on detecting whether the blades are icy or removing the ice that has formed on the blades. However, they do not protect the safety of ground equipment below the icy blades, which is a significant limitation. Summary of the Invention

[0006] The primary objective of this invention is to overcome the shortcomings and deficiencies of the prior art and provide a safe and reliable method for preventing icing in wind turbine blade sectors. After the turbine reports blade icing, this method eliminates the risk of ice blocks falling and damaging equipment below the turbine. It can protect the safety of the turbine and the equipment below at the same time, and it can automatically detect and eliminate the above risks during routine winter maintenance without the need to add additional hardware to the turbine.

[0007] The second objective of this invention is to provide a wind turbine blade icing sector anti-collision protection system.

[0008] A third objective of this invention is to provide a storage medium.

[0009] A fourth objective of this invention is to provide a computing device.

[0010] The first objective of this invention is achieved through the following technical solution: a method for preventing icing in wind turbine blades. This method involves adding an icing sector protection strategy to the original main control program of the turbine. When the main control detects icing on the blades and needs to execute the icing sector protection strategy, it controls the yaw system of the turbine to perform corresponding actions to ensure that the blades are off-center from the ground equipment. The method also performs different actions according to the actual wind conditions to achieve the goal of protecting the ground equipment while protecting the blades.

[0011] Furthermore, the method for preventing impact damage to wind turbine blade icing sectors includes the following steps:

[0012] 1) Determine the location of the icing sector of the unit;

[0013] 2) Is blade icing reported? If not, the unit will operate normally. If yes, check whether the current yaw angle is within the icing sector, whether the wind direction angle is within the icing sector, and whether the unit is in the yaw stop state. If all of these are true, the unit will enter the icing sector protection state, i.e., jump to step 3) execute the icing sector protection strategy. Otherwise, the unit will shut down normally.

[0014] 3) Once the target yaw position is determined, the yaw system executes the corresponding action, controlling the unit to yaw to the target position. After that, the blades have deviated from directly above the ground equipment.

[0015] Furthermore, in step 1), the yaw angle corresponding to the icing sector is first input into the interface of the unit's control touch screen to determine the location of the icing sector of the unit.

[0016] Furthermore, in step 3), it is first determined whether the position at an angle of 180 degrees to the current wind direction is also within the icing sector. If so, the icing sector boundary angle that is at a preset distance from the current unit's yaw position is taken as the yaw target position; otherwise, the position at an angle of 180 degrees to the current wind direction is taken as the yaw target position. Then, it is determined whether the current wind speed is greater than V1. If so, the previously obtained yaw target position is used; otherwise, the icing sector boundary angle that is at a preset distance from the current unit's yaw position is taken as the yaw target position. Here, V1 is the minimum wind speed at which the blades may be at risk after icing when the unit is shut down.

[0017] Furthermore, in step 3), once the yaw target position is determined, it is necessary to calculate the yaw target position and the current actual yaw position of the unit to determine the direction, angle and time of the required yaw. Finally, the yaw command is output to the yaw system for execution to control the unit to yaw to the target position.

[0018] Furthermore, in step 3), after the unit yaws to the target position, the unit can also automatically yaw 180 degrees leeward in real time if the angle allows, in order to protect the blade safety.

[0019] The second objective of this invention is achieved through the following technical solution: a wind turbine blade icing sector anti-collision protection system, used to implement the above-mentioned wind turbine blade icing sector anti-collision protection method, comprising:

[0020] The icing sector determination module is used to determine the location of the icing sector of the unit;

[0021] The judgment module is used to confirm whether blade icing has been reported. If not, the unit will operate normally. If it is, it will check whether the current yaw angle is within the icing sector, whether the wind direction angle is within the icing sector, and whether the unit is in the yaw stop state. If all of these are true, the unit will enter the icing sector protection state, that is, it will jump to the control module to execute the icing sector protection strategy. Otherwise, the unit will shut down normally.

[0022] The control module is used to determine the yaw target position and control the yaw system to perform corresponding actions to yaw the unit to the target position.

[0023] The third objective of this invention is achieved through the following technical solution: a storage medium storing a program, which, when executed by a processor, implements the above-mentioned method for preventing icing and impact damage to wind turbine blade sectors.

[0024] The fourth objective of this invention is achieved through the following technical solution: a computing device, including a processor and a memory for storing processor-executable programs, wherein when the processor executes the program stored in the memory, it implements the above-mentioned wind turbine blade icing sector anti-collision protection method.

[0025] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0026] 1. This invention adds a yaw system to the main control program of the generator set during routine operation and maintenance. Based on the generator set's yaw system, the blades are deflected from directly above the ground equipment in a timely manner. The necessary signals are already present in the generator set itself, so no additional hardware is required. This invention can automatically detect and eliminate the risk of ice blocks falling and damaging the equipment below the generator set during routine maintenance in winter.

[0027] 2. This invention can perform a yaw action after the unit has reported blade icing and when a risk of falling ice hitting ground equipment is detected, control the unit to yaw to the target position so that the blades are not directly above the ground equipment. Even if ice falls off, it will not affect the ground equipment, thereby reducing the risk and protecting the ground equipment. At the same time, when the angle allows, the unit also automatically yaws at 180 degrees leeward in real time, which can effectively protect the blade safety. Attached Figure Description

[0028] Figure 1 This is a flowchart of the method of the present invention.

[0029] Figure 2 This is an architecture diagram of the system of the present invention. Detailed Implementation

[0030] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0031] Example 1

[0032] This embodiment discloses a method for preventing icing in wind turbine blades, which can be implemented through programming within a PLC controller. This method involves adding an icing sector protection strategy to the existing main control program of the turbine. When the main control detects icing on the blades and needs to execute the icing sector protection strategy, it controls the turbine's yaw system to perform corresponding actions to ensure the blades are off-center from ground equipment. Different actions are executed based on actual wind conditions to achieve the goal of protecting both the blades and ground equipment. Figure 1 As shown, the specific implementation of this method includes the following steps:

[0033] 1) First, use the unit's control touchscreen to input the yaw angle corresponding to the icing sector to determine the unit's icing sector location. Within the icing sector, the blades may appear directly above ground equipment; if ice detaches, it will affect the ground equipment. Outside the icing sector, there will be no impact.

[0034] 2) Is blade icing reported? If not, the unit will operate normally. If yes, check whether the current yaw angle is within the icing sector, whether the wind direction angle is within the icing sector, and whether the unit is in a yaw-stopped state. If all of these are true, the unit will enter the icing sector protection state, i.e., jump to step 3) to execute the icing sector protection strategy. Otherwise, the unit will shut down normally.

[0035] 3) After the unit enters the icing sector protection state, first determine whether the position at an angle of 180 degrees to the current wind direction is also within the icing sector. If so, the icing sector boundary angle that is at a preset distance from the current unit's yaw position is used as the yaw target position. Otherwise, the position at an angle of 180 degrees to the current wind direction is used as the yaw target position. Then determine whether the current wind speed is greater than V1. If so, continue to use the previously obtained yaw target position. Otherwise, the icing sector boundary angle that is at a preset distance from the current unit's yaw position is also used as the yaw target position. Here, V1 is the minimum wind speed at which the blades may be at risk after icing when the unit is shut down.

[0036] Once the target yaw position is determined, it is necessary to calculate the target yaw position and the current actual yaw position of the unit to determine the required yaw direction, angle, and time. Finally, the yaw command is output to the yaw system for execution, controlling the unit to yaw to the target position.

[0037] After the unit yaws to the target position, the blades are already off-center from directly above the ground equipment, so even if icing occurs and blades break off, it will not affect the ground equipment. At the same time, when the angle allows, the unit also automatically yaws 180 degrees leeward in real time, which can effectively protect the blades.

[0038] Example 2

[0039] This embodiment discloses a wind turbine blade icing sector anti-collision protection system, used to implement the wind turbine blade icing sector anti-collision protection method described in Embodiment 1, such as... Figure 2 As shown, the system includes the following functional modules:

[0040] The icing sector determination module is used to determine the location of the icing sector of the unit;

[0041] The judgment module is used to confirm whether blade icing has been reported. If not, the unit will operate normally. If it is, it will check whether the current yaw angle is within the icing sector, whether the wind direction angle is within the icing sector, and whether the unit is in the yaw stop state. If all of these are true, the unit will enter the icing sector protection state, that is, it will jump to the control module to execute the icing sector protection strategy. Otherwise, the unit will shut down normally.

[0042] The control module is used to determine the yaw target position and control the yaw system to perform corresponding actions to yaw the unit to the target position.

[0043] Example 3

[0044] This embodiment discloses a storage medium storing a program. When the program is executed by a processor, it implements the wind turbine blade icing sector anti-collision protection method described in Embodiment 1.

[0045] The storage medium in this embodiment can be a disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), USB flash drive, portable hard drive, etc.

[0046] Example 4

[0047] This embodiment discloses a computing device, including a processor and a memory for storing processor-executable programs. When the processor executes the program stored in the memory, it implements the wind turbine blade icing sector anti-collision protection method described in Embodiment 1.

[0048] The computing device described in this embodiment may be a desktop computer, laptop computer, smartphone, PDA handheld terminal, tablet computer, programmable logic controller (PLC), or other terminal device with processor function.

[0049] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. A method for preventing impact damage to wind turbine blades in icing sectors, characterized in that, This method involves adding an icing sector protection strategy to the unit's existing main control program. When the main control detects blade icing and the icing sector protection strategy needs to be executed, it controls the unit's yaw system to perform corresponding actions to ensure that the blades are off-center from ground equipment. Different actions are performed based on actual wind conditions to achieve the goal of protecting both the blades and ground equipment. The method includes the following steps: 1) Determine the location of the icing sector of the unit; 2) Is blade icing reported? If not, the unit will operate normally. If yes, check whether the current yaw angle is within the icing sector, whether the wind direction angle is within the icing sector, and whether the unit is in the yaw stop state. If all of these are true, the unit will enter the icing sector protection state, i.e., jump to step 3) execute the icing sector protection strategy. Otherwise, the unit will shut down normally. 3) Once the target yaw position is determined, the yaw system executes the corresponding actions, controlling the unit to yaw to the target position. After this, the blades are no longer directly above the ground equipment, as detailed below: First, determine if the position at a 180-degree angle to the current wind direction is also within the icing sector. If so, use the icing sector boundary angle that is at a preset distance from the current yaw position as the yaw target position; otherwise, use the position at a 180-degree angle to the current wind direction as the yaw target position. Next, determine if the current wind speed is greater than V1. If so, continue using the previously obtained yaw target position; otherwise, use the icing sector boundary angle that is at a preset distance from the current yaw position as the yaw target position. Here, V1 is the minimum wind speed at which the blades may be at risk after icing when the unit is shut down. Once the yaw target position is determined, it is necessary to calculate the yaw target position and the current actual yaw position of the crew to determine the direction, angle and time of the required yaw. Finally, the yaw command is output to the yaw system for execution to control the crew to yaw to the target position. Once the unit yaws to the target position, it can also automatically yaw 180 degrees leeward in real time, provided the angle allows, to protect the blades.

2. The method for preventing impact damage to wind turbine blades in icing sectors according to claim 1, characterized in that, In step 1), the yaw angle corresponding to the icing sector is first entered on the control touch screen of the unit to determine the location of the icing sector of the unit.

3. A wind turbine blade icing sector anti-collision protection system, characterized in that, The method for preventing impact damage to wind turbine blades in icing sectors as described in claim 1 or 2 includes: The icing sector determination module is used to determine the location of the icing sector of the unit; The judgment module is used to confirm whether blade icing has been reported. If not, the unit will operate normally. If it is, it will check whether the current yaw angle is within the icing sector, whether the wind direction angle is within the icing sector, and whether the unit is in the yaw stop state. If all of these are true, the unit will enter the icing sector protection state, that is, it will jump to the control module to execute the icing sector protection strategy. Otherwise, the unit will shut down normally. The control module is used to determine the yaw target position and control the yaw system to perform corresponding actions to yaw the unit to the target position.

4. A storage medium storing a program, characterized in that, When the program is executed by the processor, it implements the wind turbine blade icing sector anti-collision protection method as described in claim 1 or 2.

5. A computing device, comprising a processor and a memory for storing a processor-executable program, characterized in that, When the processor executes the program stored in the memory, it implements the wind turbine blade icing sector anti-collision protection method as described in claim 1 or 2.

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