CN117869221A - Wind generating set safety control method, system and equipment based on blade tip clearance - Google Patents

Abstract

The invention provides a wind generating set safety control method, a system and equipment based on blade tip clearance, which comprise the following steps: step 1, calculating a multi-level safety threshold value of blade tip clearance corresponding to a wind generating set to be tested; step 2, setting a security control strategy of the wind generating set to be tested according to the multi-level security threshold value; step 3, controlling the operation of the wind generating set to be tested according to the obtained safety control strategy of the wind generating set to be tested; the invention can evaluate and adopt a safety control strategy of variable pitch, reduce the risk of tower sweeping and ensure the safety of the blades and the fan.

Description

Wind turbine generator safety control method, system and equipment based on blade tip clearance

Technical Field

The present invention belongs to the field of wind power generation safety, and in particular relates to a wind power generator set safety control method, system and equipment based on blade tip clearance.

Background technique

With the continuous development of the industry, the capacity of wind turbines is getting larger and larger, and the impeller diameter is getting larger and larger, and the blades are getting longer and longer. The increase in blade length directly reflects the decrease in overall blade stiffness, and the deformation of the blades during the operation of the wind turbine is getting larger and larger. As a result, the distance between the blade tip and the outer wall of the tower (blade tip clearance) is getting smaller and smaller, which makes the blade tip clearance gradually become one of the key technical indicators in the design of the wind turbine support structure.

At the same time, during the operation of wind turbines, due to the large deformation of blades, blade sweeping tower phenomena occur frequently, and some even endanger the safety of the wind turbine tower.

In order to avoid the occurrence of blade sweeping the tower as much as possible and ensure the safety of wind turbines, there is currently no corresponding safety control strategy for wind turbines. Only under conditions of extreme gusts or wind speeds exceeding the cut-out wind speed, the blade retraction action is adopted. This is also the emergency shutdown or normal shutdown action of the wind turbine, which is a shutdown protection strategy under extreme conditions.

Summary of the invention

The purpose of the present invention is to provide a wind turbine generator set safety control method, system and equipment based on blade tip clearance, which solves the defect of safety hazards in the tower of the existing wind turbine generator set.

In order to achieve the above object, the technical solution adopted by the present invention is:

The wind turbine generator set safety control method based on blade tip clearance provided by the present invention comprises the following steps:

Step 1, calculating the multi-level safety threshold of the blade tip clearance corresponding to the wind turbine generator set to be tested;

Step 2, setting a safety control strategy for the wind turbine generator set to be tested according to the multi-level safety threshold;

Step 3: Control the operation of the wind turbine generator set to be tested according to the obtained safety control strategy of the wind turbine generator set to be tested.

Preferably, in step 1, the multi-level safety threshold of the blade tip clearance corresponding to the wind turbine generator set to be tested is calculated by:

Obtain the instantaneous turbulence corresponding to the wind turbine to be tested and the average wind speed within the set time period, and calculate the multi-level safety threshold of the blade tip clearance according to the tower safety requirements.

Preferably, the multi-level safety threshold of blade tip clearance is calculated according to the following formula:

Among them, k _v1 is the average wind speed correction coefficient; k _i1 is the turbulence correction coefficient; v is the average wind speed; i is the instantaneous turbulence; f is the blade tip clearance safety threshold.

Preferably, the multi-level safety threshold is a three-level safety threshold, which are the blade tip clearance safety threshold for emergency retraction, the blade tip clearance safety threshold for normal retraction and the blade tip clearance safety threshold for no retraction action required, among which the blade tip clearance safety threshold for emergency retraction is the first-level safety threshold, the blade tip clearance safety threshold for normal retraction is the second-level safety threshold, and the blade tip clearance safety threshold for no retraction action required is the third-level safety threshold.

Preferably, in step 2, the wind turbine generator set safety control strategy is set according to the multi-level safety threshold, and the specific method is:

Real-time measurement of the blade tip clearance value of the wind turbine to be tested;

The obtained blade tip clearance value is matched with the set multi-level safety threshold to set the wind turbine generator set safety control strategy.

Preferably, the wind turbine generator set safety control strategy is:

When the measured blade tip clearance value is less than or equal to the first-level safety threshold, the corresponding safety control strategy is to urgently retract the blades and reduce the generator torque;

When the measured blade tip clearance value is greater than the first-level safety threshold and less than or equal to the second-level safety threshold, the corresponding safety control strategy is rapid retraction of the blades;

When the measured blade tip clearance value is greater than the second-level safety threshold and less than or equal to the third-level safety threshold, the corresponding safety control strategy is normal retraction.

The wind turbine generator safety control system based on blade tip clearance includes the following steps:

A safety threshold calculation unit, used to calculate the multi-level safety threshold of the blade tip clearance corresponding to the wind turbine generator set to be tested;

A control strategy setting unit, used to set the safety control strategy of the wind turbine generator set to be tested according to the multi-level safety threshold;

The unit operation control unit is used to control the operation of the wind turbine generator set to be tested according to the obtained safety control strategy of the wind turbine generator set to be tested.

A computer device/apparatus/system comprises a memory, a processor and a computer program stored in the memory, wherein the processor executes the computer program to implement the steps of the method.

A computer-readable storage medium stores a computer program/instruction thereon, which implements the steps of the method when executed by a processor.

Compared with the prior art, the present invention has the following beneficial effects:

The wind turbine generator set safety control method based on blade tip clearance provided by the present invention calculates the multi-level safety thresholds of blade tip clearance, then sets the safety control strategy based on the safety thresholds of blade tip clearance, and finally evaluates and adopts the safety control strategy of variable pitch according to the blade tip clearance and the external environmental parameters of the wind turbine generator set, thereby reducing the risk of tower sweeping and ensuring the safety of blades and wind turbines.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a flow chart of the present invention;

FIG. 2 is a schematic diagram of the control strategy of the present invention.

Detailed ways

In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

Example 1

As shown in FIG. 1 and FIG. 2 , the wind turbine generator set safety control method based on blade tip clearance provided in this embodiment includes the following steps:

Step 1, calculating the multi-level safety threshold of blade tip clearance;

Step 2, setting a wind turbine generator set safety control strategy according to a multi-level safety threshold;

Step 3: controlling the operation of the wind turbine generator set according to the obtained wind turbine generator set safety control.

This embodiment calculates the multi-level safety threshold of blade tip clearance, based on the safety control strategy of blade tip clearance and the hardware and software system that implements this safety control strategy. The system evaluates and adopts the safety control strategy of pitch control according to the blade tip clearance and the external environmental parameters of the wind turbine generator set, reduces the risk of tower sweeping, and ensures the safety of blades and wind turbines.

Example 2

On the basis of Example 1, the present embodiment provides a wind turbine generator set safety control method based on blade tip clearance. In step 1, the multi-level safety threshold of blade tip clearance is calculated. The specific method is:

Obtain the instantaneous turbulence corresponding to the wind turbine to be tested and the average wind speed within the set time period, and calculate the multi-level safety threshold of the blade tip clearance according to the tower safety requirements;

The multi-level safety threshold is a three-level safety threshold, which is a blade tip clearance safety threshold that requires emergency retraction as the first safety threshold, a blade tip clearance safety threshold that is normal retraction as the second safety threshold, and a blade tip clearance safety threshold that does not require retraction as the third safety threshold.

The safe threshold of blade tip clearance is calculated according to the following formula:

Where: k _v1 is the average wind speed correction coefficient; k _i1 is the turbulence correction coefficient; v is the average wind speed; i is the instantaneous turbulence; f is the blade tip clearance safety threshold.

The average wind speed correction coefficient and the turbulence correction coefficient are determined according to safety requirements and actual conditions of the wind field.

Example 3

On the basis of Example 1, the present embodiment provides a wind turbine generator set safety control method based on blade tip clearance. In step 2, a wind turbine generator set safety control strategy is set according to a multi-level safety threshold. The specific method is:

Real-time measurement of the blade tip clearance value of the wind turbine to be tested;

The obtained blade tip clearance value is matched with the set multi-level safety threshold to set the wind turbine generator set safety control strategy.

The specific safety control strategy for wind turbines is:

When the measured blade tip clearance value is less than or equal to the first-level safety threshold, the corresponding safety control strategy is to urgently retract the blades and reduce the generator torque;

When the measured blade tip clearance value is greater than the first-level safety threshold and less than or equal to the second-level safety threshold, the corresponding safety control strategy is rapid retraction of the blades;

When the measured blade tip clearance value is greater than the second-level safety threshold and less than or equal to the third-level safety threshold, the corresponding safety control strategy is normal retraction.

Among them, fs is the actual measured value of blade clearance; f1 is the first-level safety threshold; f2 is the second-level safety threshold; f3 is the third-level safety threshold.

Example 2

Based on Example 1, the wind turbine generator safety control system based on blade tip clearance provided in this embodiment includes the following steps:

A safety threshold calculation unit, used to calculate the multi-level safety threshold of the blade tip clearance corresponding to the wind turbine generator set to be tested;

A control strategy setting unit, used to set the safety control strategy of the wind turbine generator set to be tested according to the multi-level safety threshold;

The unit operation control unit is used to control the operation of the wind turbine generator set to be tested according to the obtained safety control strategy of the wind turbine generator set to be tested.

Example 3

On the basis of Example 1, this embodiment provides a terminal device, which includes a processor and a memory, the memory is used to store a computer program, the computer program includes program instructions, and the processor is used to execute the program instructions stored in the computer storage medium. The processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc., which are the computing core and control core of the terminal, which are suitable for implementing one or more instructions, and are specifically suitable for loading and executing one or more instructions to implement the corresponding method flow or corresponding functions; the processor described in the embodiment of the present invention can be used for the operation of the method described in Example 1.

Example 4

On the basis of Example 1, the computer device provided in this embodiment includes: a processor, a memory, and a computer program stored in the memory and executable on the processor. When the computer program is executed by the processor, the method for calculating the fluid composition in the reservoir transformation wellbore in the embodiment is implemented. To avoid repetition, it is not described one by one here. Alternatively, when the computer program is executed by the processor, the functions of each model/unit in the system of Example 2 are implemented. To avoid repetition, it is not described one by one here.

The computer device may be a computing device such as a desktop computer, a notebook, a PDA, or a cloud server. The computer device may include, but is not limited to, a processor and a memory. The computer device may include more or fewer components than shown in the figure, or may combine certain components, or different components. For example, the computer device may also include input and output devices, network access devices, buses, etc.

The processor may be a central processing unit (CPU), other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc.

The memory can be an internal storage unit of a computer device, such as a hard disk or memory of a computer device. The memory can also be an external storage device of a computer device, such as a plug-in hard disk, a smart memory card (SMC), a secure digital (SD) card, a flash card, etc. equipped on the computer device.

Furthermore, the memory may include both an internal storage unit of a computer device and an external storage device. The memory is used to store computer programs and other programs and data required by the computer device. The memory may also be used to temporarily store data that has been output or is to be output.

In another embodiment, this embodiment further provides a storage medium, specifically a computer-readable storage medium (Memory), which is a memory device in a terminal device for storing programs and data. It is understandable that the computer-readable storage medium here can include both the built-in storage medium in the terminal device and the extended storage medium supported by the terminal device. The computer-readable storage medium provides a storage space, which stores the operating system of the terminal. In addition, one or more instructions suitable for being loaded and executed by the processor are also stored in the storage space, and these instructions can be one or more computer programs (including program codes). It should be noted that the computer-readable storage medium here can be a high-speed RAM memory or a non-volatile memory (Non-Volatile Memory), such as at least one disk memory.

One or more instructions stored in a computer-readable storage medium can be loaded and executed by a processor to implement the corresponding steps of the method described in Example 1 in the above embodiments; one or more instructions in a computer-readable storage medium are loaded and executed by a processor to perform the steps of the method described in Example 1.

The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims (9)

1. The wind generating set safety control method based on blade tip clearance is characterized by comprising the following steps of:

step 1, calculating a multi-level safety threshold value of blade tip clearance corresponding to a wind generating set to be tested;

step 2, setting a security control strategy of the wind generating set to be tested according to the multi-level security threshold value;

and step 3, controlling the operation of the wind generating set to be tested according to the obtained safety control strategy of the wind generating set to be tested.

2. The wind generating set safety control method based on blade tip clearance according to claim 1, wherein in step 1, a multi-stage safety threshold value of the blade tip clearance corresponding to the wind generating set to be tested is calculated, and the specific method is as follows:

and obtaining the corresponding instantaneous turbulence degree of the wind driven generator to be detected and the average wind speed in a set time period, and calculating the multilevel safety threshold value of the blade tip clearance according to the safety requirement of the tower barrel.

3. The blade tip clearance-based wind generating set safety control method of claim 2, wherein the multi-stage safety threshold for blade tip clearance is calculated according to the formula:

wherein k is _v1 Correcting the coefficient for the average wind speed; k (k) _i1 Is a turbulence correction coefficient; v is the average wind speed; i is the instantaneous turbulence; f is a tip clearance safety threshold.

4. The blade tip clearance-based wind generating set safety control method according to claim 2, wherein the multi-level safety threshold is a three-level safety threshold, which is respectively a blade tip clearance safety threshold requiring emergency pitching, a blade tip clearance safety threshold requiring normal pitching, and a blade tip clearance safety threshold requiring no pitching action, wherein the blade tip clearance safety threshold requiring emergency pitching is a first-level safety threshold, the blade tip clearance safety threshold requiring normal pitching is a second-level safety threshold, and the blade tip clearance safety threshold requiring no pitching action is a third-level safety threshold.

5. The blade tip clearance-based wind generating set safety control method according to claim 1, wherein in step 2, a wind generating set safety control strategy is set according to a multi-level safety threshold, and the specific method is as follows:

measuring the tip clearance value of the wind driven generator to be measured in real time;

and setting a wind generating set safety control strategy by matching the obtained blade tip clearance value with the set multilevel safety threshold value.

6. The blade tip clearance-based wind generating set safety control method according to claim 5, wherein the set wind generating set safety control strategy specifically comprises:

when the measured blade tip clearance value is smaller than or equal to a first-level safety threshold value, the corresponding safety control strategy is emergency blade collection and generator torque is reduced;

when the measured blade tip clearance value is larger than the primary safety threshold value and smaller than or equal to the secondary safety threshold value, the corresponding safety control strategy is to rapidly harvest the blade;

when the measured blade tip clearance value is larger than the second-level safety threshold value and smaller than or equal to the third-level safety threshold value, the corresponding safety control strategy is normal pitch-up.

7. Wind generating set safety control system based on apex headroom, its characterized in that includes following steps:

the safety threshold value calculation unit is used for calculating a multi-stage safety threshold value of the blade tip clearance corresponding to the wind generating set to be detected;

the control strategy setting unit is used for setting the safety control strategy of the wind generating set to be tested according to the multi-level safety threshold value;

and the unit operation control unit is used for controlling the operation of the wind generating set to be tested according to the obtained safety control strategy of the wind generating set to be tested.

8. A computer apparatus/device/system comprising a memory, a processor and a computer program stored on the memory, wherein the processor executes the computer program to perform the steps of the method of claim 1.

9. A computer readable storage medium having stored thereon a computer program/instruction which when executed by a processor performs the steps of the method of claim 1.