CN117189503A - Limit load control method, device, medium and wind generating set - Google Patents
Limit load control method, device, medium and wind generating set Download PDFInfo
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Abstract
The disclosure provides a limit load control method, a limit load control device, a limit load control medium and a wind generating set. The limit load control method may include: obtaining a load value of the gearbox; determining a numerical relationship between a load value of the gearbox and a predetermined extreme load threshold; and performing power limiting operation on the wind generating set according to the range of the numerical relation so as to reduce the load value of the gear box. According to the limit load control method of the embodiment of the disclosure, the load allowance of the gear box can be properly reduced, the cost of the wind generating set can be reduced, and the safety of the wind generating set is improved.
Description
Technical Field
The present disclosure relates generally to the field of wind power, and more particularly, to a limit load control method, device, medium, and wind turbine generator set.
Background
The gear box is one of the most important parts of the large-scale semi-direct-drive wind generating set and the doubly-fed wind generating set, and is also a part with relatively large cost of the whole machine.
On the one hand, if the load margin of the gearbox is designed to be too large, the cost of the wind generating set can be greatly increased; on the other hand, if the load allowance of the gear box is designed to be insufficient, the gear box is possibly damaged, the safety of the wind generating set is seriously affected, and the maintenance and hoisting cost is extremely high.
The traditional gear box load protection mode is a transmission chain resistance adding strategy, but the protection mode mainly reduces fatigue of a transmission chain and protects a supporting bearing, the gear box cannot be directly protected, the limit load of the gear box can only be indirectly reduced, and the gear box has insufficient reliability.
Disclosure of Invention
It is an object of exemplary embodiments of the present disclosure to provide a limit load control method capable of reducing a load value of a gear box.
It is an object of exemplary embodiments of the present disclosure to provide a limit load control method capable of properly reducing a gear box load margin and improving safety of a wind turbine generator set.
According to an aspect of the present disclosure, there is provided a limit load control method of a wind turbine gearbox, the limit load control method comprising: obtaining a load value of the gearbox; determining a numerical relationship between a load value of the gearbox and a predetermined extreme load threshold; and performing power limiting operation on the wind generating set according to the range of the numerical relation so as to reduce the load value of the gearbox.
According to another aspect of the present disclosure, a computer readable storage medium is provided, which stores instructions or a program which, when executed by a processor, implements a limit load control method according to a wind turbine generator set gearbox as described above.
According to another aspect of the present disclosure, there is provided a limit load control device of a gear box of a wind turbine generator system, the limit load control device comprising: the load value acquisition unit is used for acquiring a load value of the gear box; a load comparison unit for determining a numerical relationship between a load value of the gearbox and a predetermined limit load threshold; and the control unit is used for executing power limiting operation on the wind generating set according to the range of the numerical relation so as to reduce the load value of the gear box.
According to another aspect of the present disclosure, there is provided a limit load control device for a wind turbine gearbox, the limit load control device comprising a processor and a memory: the memory is used for storing the program codes and transmitting the program codes to the processor; the processor is configured to execute the limit load control method of the wind turbine generator system gearbox as described above according to instructions in the program code.
According to another aspect of the present disclosure, a wind park is provided, comprising a limit load control device as described above or a computer readable storage medium as described above.
The limit load control method and the limit load control device according to the embodiments of the present disclosure may not require an additional sensor.
The limit load control method and the limit load control device according to the embodiment of the disclosure can reduce the cost of the wind generating set.
Additional aspects and/or advantages of the present general inventive concept will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the general inventive concept.
Drawings
The foregoing and other objects and features of exemplary embodiments of the present disclosure will become more apparent from the following description taken in conjunction with the accompanying drawings which illustrate the embodiments by way of example, in which:
fig. 1 is a flowchart showing a limit load control method according to a first embodiment of the present disclosure;
fig. 2 is a flowchart showing a limit load control method according to a second embodiment of the present disclosure;
fig. 3 is a flowchart showing a limit load control method according to a third embodiment of the present disclosure;
fig. 4 is a flowchart showing a limit load control method according to a fourth embodiment of the present disclosure;
fig. 5 is a flowchart showing a limit load control method according to a fifth embodiment of the present disclosure;
fig. 6 is a block diagram illustrating a limit load control device according to an embodiment of the present disclosure.
Detailed Description
Reference will now be made in detail to embodiments of the present disclosure, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout. The embodiments will be described below in order to explain the present disclosure by referring to the figures.
The limit load control method and the limit load control device according to the embodiments of the present disclosure are used to reduce a load value (e.g., a limit load value) of a gearbox of a wind turbine generator system.
The present disclosure obtains a load value of a gearbox by sensor measurement or by estimation using known parameters, and performs one of a plurality of power limiting operations based on a magnitude of the load value of the gearbox and a time for which it remains in a specific range, thereby reducing the load value of the gearbox.
The limit load control method and the limit load control device according to the embodiment of the disclosure execute the control action of limit power by utilizing different limit load thresholds, thereby achieving the aim of protecting the limit load of the gearbox.
The limit load control method and the limit load control device according to the embodiments of the present disclosure perform a power limiting operation in case that an estimated or measured load value of a gear box exceeds a pre-designed threshold load value or limit load value, thereby overload protecting the gear box of the wind power generation set.
Conventional operating loads such as those experienced by a gearbox during normal operation between cut-in and cut-out wind speeds typically do not exceed a predetermined threshold load, and loads due to external disturbance factors and extreme loads such as extreme wind conditions, emergency stops, typhoons, etc. may cause load values to exceed a predetermined threshold load, and the extreme load control methods and apparatus according to embodiments of the present disclosure may be used to load control and overload protect a gearbox beyond threshold loads in such conditions.
Exemplary embodiments of the present disclosure will be described below with reference to the accompanying drawings.
Fig. 1 is a flowchart showing a limit load control method according to a first embodiment of the present disclosure, fig. 2 is a flowchart showing a limit load control method according to a second embodiment of the present disclosure, fig. 3 is a flowchart showing a limit load control method according to a third embodiment of the present disclosure, fig. 4 is a flowchart showing a limit load control method according to a fourth embodiment of the present disclosure, and fig. 5 is a flowchart showing a limit load control method according to a fifth embodiment of the present disclosure.
As shown in fig. 1, the limit load control method of the wind turbine gearbox according to the embodiment of the present disclosure includes steps S110, S120 and S130.
In step S110, a load value of a gearbox of the wind turbine is obtained.
Specifically, the load value of the gear box (e.g., the drive train low speed shaft Mx load) may be obtained based on a sensor for measuring the load value of the gear box, or the corresponding load value may be extracted based on pre-measured load data, or the corresponding load value may be obtained by estimating the drive train low speed shaft Mx load of the gear box of the wind power generation set.
In one example, the step S110 of obtaining a load value of a gearbox of a wind turbine may comprise: and estimating the load value of the gear box according to the operation parameters of the wind generating set during operation and the basic information of the wind generating set.
As an example, the basic information of the wind power generation set may include impeller inertia of the wind power generation set, reduction ratio of a gear box of the wind power generation set, and gear box and generator inertia of the wind power generation set, and the operation parameters of the wind power generation set when operated may include generator rotational speed of the wind power generation set and generator electromagnetic torque of the wind power generation set.
The load value of the gear box can be estimated and obtained according to the impeller inertia of the wind generating set, the reduction ratio of the gear box, the electromagnetic torque of the generator of the wind generating set and the change rate of the rotating speed of the generator of the wind generating set and based on the dynamic equation of the transmission chain of the gear box.
By way of example, the above-described drive train dynamics equation may be represented by the following equation (1).
Wherein T is low For the load of the gearbox (e.g. input torque of the gearbox), J hub The inertia of a hub or the inertia of an impeller of the wind generating set, G is the reduction ratio of a transmission chain or the reduction ratio of a gear box, J g For the inertia of the gearbox and the generator,t is the rotation speed change rate of the generator g Is the electromagnetic torque of the generator.
The generator rotational speed change rate may be obtained by taking the difference in the generator rotational speeds. As an example, the result of the generator speed difference may be subjected to a moving average filtering with a small time constant (e.g., less than 0.5) to remove high frequency noise therein.
The moving average filter is a first-order infinite impulse response filter, and the calculation formula of the moving average filter can be:
where X refers to the input of the filter (i.e., the generator speed rate of change including high frequency noise), Y refers to the output of the filter (i.e., the generator speed rate of change), α is a filter time constant, and as an example, α may be less than 0.5.
The load value of the gearbox can be obtained by the above formula (1), and the most effective way to reduce the load value of the gearbox can be found by formula (1) to be to reduce the electromagnetic torque of the generator, i.e. to operate at reduced power.
As an example, the power reduction operation may comprise at least one of reducing a torque of the generator and reducing a rotational speed of the generator, and may be achieved in particular by performing a corresponding control of the converter or the pitch system.
In step S120, a numerical relationship between the load value of the gearbox and a predetermined extreme load threshold is determined.
Here, the predetermined limit load threshold may be a limit load value of a gear case designed in advance.
The numerical relation between the load value of the gear box and the predetermined limit load threshold may include a difference between the load value of the gear box and the predetermined limit load threshold or a ratio between the load value of the gear box and the predetermined limit load threshold, however, a parameter capable of reflecting the numerical relation between the load value of the gear box and the predetermined limit load threshold is not limited thereto.
In step S130, a power limiting operation is performed on the wind turbine generator system according to a range in which the numerical relationship is located, so as to reduce a load value of the gearbox.
For example, the power limiting operation may be performed when a difference between a load value of the gear box and a predetermined limit load threshold exceeds a preset range or a predetermined threshold, or when a ratio between the load value of the gear box and the predetermined limit load threshold exceeds the preset range or the predetermined threshold.
A corresponding duration judgment condition may be set in order to prevent frequent start-up and shut-down of the power-limited operation.
As an example, the power limiting operation of different degrees may be performed when the difference between the load value of the gear case and the predetermined limit load threshold exceeds a preset range or a predetermined threshold, or when the ratio between the load value of the gear case and the predetermined limit load threshold exceeds a preset range or a predetermined threshold, and the time of exceeding the preset range or the predetermined threshold continues for a predetermined time.
Referring to fig. 2, a limit load control method of a wind turbine gearbox may include steps S210, S220, and S230 according to an embodiment of the present disclosure.
As an example, in step S210, the load value of the gearbox is estimated according to the operation parameters of the wind turbine generator system and the basic information of the wind turbine generator system, which may be described above and not described here again.
Similar to step S120, in step S220, a numerical relationship between the load value of the gearbox and a predetermined extreme load threshold is determined. The predetermined limit load threshold may be a threshold determined during the fan design phase or may be adaptively adjusted during operation.
In step S230, one of a plurality of power limiting operations of different power limiting degrees is performed according to the range in which the numerical relationship is located and the duration in which the numerical relationship is maintained in the range.
In one example, the power limiting operation may be performed when a difference between the load value of the gearbox and a predetermined limit load threshold is greater than a predetermined value, or when a ratio between the load value of the gearbox and the predetermined limit load threshold is greater than a predetermined value, and the difference is greater than the predetermined value or a time when the ratio is greater than the predetermined value is continued for a predetermined time.
The greater the above-described difference or ratio, the greater the degree of the power-limited operation that may be performed, and the longer the duration that the difference is greater than a predetermined value or the ratio is greater than a predetermined value, the greater the degree of the power-limited operation that may be performed.
Referring to fig. 3 and 4, a specific execution procedure of step S130 or S230 will be described.
In step S2310, a ratio R between the load value of the gearbox and a predetermined extreme load threshold may be obtained.
In step S2320 and step S2230, the range in which the ratio R is located and the time for which the ratio R is maintained or persisted in that range are determined.
In step S2340, a first power limiting operation of limiting the power of the wind turbine group to a first power is performed in response to a ratio R between a load value of the gearbox and a predetermined limit load threshold value being greater than or equal to a first threshold value T1 and being maintained for a first predetermined time.
In one example, a first power limiting operation of limiting the wind turbine assembly to a first power may be performed by controlling the torque of the generator and the rotational speed of the generator for the converter and/or the pitch system.
The first power limiting operation of limiting the power of the wind turbine group to the first power may also be performed in response to a ratio R between the load value of the gearbox and a predetermined limit load threshold value being greater than or equal to a second threshold value T2 and being maintained for a second predetermined time, the first threshold value being less than the second threshold value and the second predetermined time being less than the first predetermined time.
That is, the first power limiting operation may also be performed when the ratio R between the load value of the gearbox and the predetermined extreme load threshold is greater but of shorter duration. The first power limited operation herein is one of the various power limited operations described above.
In one example, the power limiting operation may be performed by reducing generator torque or generator speed.
Referring to fig. 4 and 5, various power limiting operations of varying degrees may be performed with different load thresholds of the gearbox.
In step S2350, the range in which the ratio R is located and the time for which the ratio R is maintained or persisted in the range may be determined.
In step S2360, a second power limiting operation of limiting the power of the wind turbine group to a second power may be performed in response to a ratio between the load value of the gearbox and a predetermined limit load threshold value being greater than or equal to a third threshold value T3, the third threshold value being greater than the second threshold value, the third predetermined time being less than the second predetermined time, and the second power being less than the first power, and for a third predetermined time.
Specifically, the second power limiting operation may be performed by simultaneously reducing the generator torque and the generator rotational speed. That is, control of the converter and the pitch system may be performed simultaneously to perform the second power limiting operation. The second power limited operation herein is one of the various power limited operations described above.
As an example, the first, second, and third thresholds T1, T2, and T3 may be 1, 1.1, and 1.2, respectively, and the first, second, and third predetermined times may be 30 minutes, 10 minutes, and 1 minute, respectively. The first threshold T1, the second threshold T2, the third threshold T3, the first predetermined time, the second predetermined time, and the third predetermined time may be predetermined and may be adjusted as needed.
The present disclosure sets three threshold loads to perform corresponding determination, but the present disclosure is not limited thereto, and more different threshold loads may be set as needed to perform corresponding determination.
The power limiting operation may not be performed when the ratio between the load value of the gearbox and the predetermined extreme load threshold is not within the above-mentioned range or does not meet the duration requirement.
When the load value of the gearbox is reduced to the target load value, the wind turbine may be restored to a normal power generation state (i.e., the power limited operation is exited).
Referring to fig. 5, a range in which the ratio R between the load value of the gear box and the predetermined limit load threshold value is located and a time during which the ratio R is maintained or sustained may be determined at steps S2370, S2380.
In response to the ratio between the load value of the gearbox and the predetermined limit load threshold value being less than the first threshold value T1 and the ratio being less than the first threshold value for a fourth predetermined time after the performance of the first limit power operation, the wind turbine may be restored to a normal power generating state or the limit power operation may be exited at step S2390.
In response to the performance of the second power limiting operation, the ratio is less than a fourth threshold value, and the ratio is less than the fourth threshold value for a fifth predetermined time, which may be less than the first threshold value, the fifth predetermined time may be less than the fourth predetermined time, the fourth threshold value may be 0.9 or 0.8, the fourth predetermined time may be 30 minutes, and the fifth predetermined time may be 10 minutes.
The respective steps described above may be written as software programs or instructions, and thus, the limit load control method of the gear box according to the exemplary embodiment of the present disclosure may be implemented via software, and the computer-readable storage medium of the exemplary embodiment of the present disclosure may store a computer program which, when executed by a processor, implements the limit load control method of the gear box as described in the exemplary embodiment described above.
The computer-readable storage medium includes non-transitory computer-readable storage media, which may include, for example, magnetic media such as floppy disks and magnetic tapes, optical media including Compact Disk (CD) ROMs, and DVD ROMs, magneto-optical media such as floppy disks, hardware devices such as ROMs, RAMs, and flash memories designed to store and execute program commands. The program commands include language code executable by a computer using an interpreter and machine language code generated by a compiler.
In one example, the instructions or software include machine code (such as machine code produced by a compiler) that is directly executed by one or more processors or computers. In another example, the instructions or software include higher-level code that is executed by one or more processors or computers using an interpreter. The instructions or software may be written using any programming language based on the block diagrams and flowcharts shown in the figures and the corresponding descriptions in the specification.
A limit load control device according to an embodiment of the present disclosure will be described below.
Fig. 6 is a block diagram illustrating a limit load control device according to an embodiment of the present disclosure.
Referring to fig. 6, a limit load control device of a wind turbine gearbox according to an embodiment of the present disclosure may include a load value acquisition unit 610, a load comparison unit 620, and a control unit 630.
The load value acquisition unit 610 may acquire a load value of the gear box.
The load value obtaining unit 610 may obtain a load value of the gear box (e.g., a drive train low speed shaft Mx load) based on a sensor for measuring the load value of the gear box, or extract a corresponding load value based on pre-measured load data, or may obtain a corresponding load value by estimating the drive train low speed shaft Mx load of the gear box of the wind power generation set.
In one example, the load value acquisition unit 610 may estimate the load value of the gearbox from the operating parameters of the wind turbine generator set when operating and the basis information of the wind turbine generator set.
As an example, the basic information of the wind power plant may include an impeller inertia of the wind power plant, a reduction ratio of a gear box of the wind power plant, and a gear box and a generator inertia of the wind power plant, and the operation parameters of the wind power plant when operated may include a generator rotational speed of the wind power plant and a generator electromagnetic torque of the wind power plant.
The load value obtaining unit 610 may obtain the load value of the gear box according to the inertia of the impeller of the wind generating set, the reduction ratio of the gear box, the electromagnetic torque of the generator of the wind generating set, the change rate of the rotation speed of the generator of the wind generating set, and the estimation based on the dynamic equation of the transmission chain of the gear box. The load value obtaining unit 610 may obtain a load value of a gearbox of the wind generating set according to the above-mentioned drive train dynamics equation.
The load comparison unit 620 may determine a numerical relationship between the load value of the gearbox and a predetermined extreme load threshold.
The numerical relationship between the load value of the gearbox and the predetermined extreme load threshold may be other mathematical operations than the difference, ratio, as described above, that reflect the numerical relationship between the load value of the gearbox and the predetermined extreme load threshold.
The control unit 630 may perform a power limiting operation on the wind power unit according to a range in which the numerical relationship is located, to reduce a load value of the gear box.
The control unit 630 may perform one of a plurality of power limiting operations having different power limiting degrees according to a range in which the numerical relationship is located and a duration in which the numerical relationship is maintained in the range. The power limited operation may include a torque down and speed down operation, and the control unit 630 may perform the power down operation by controlling the converter and/or the pitch system.
In one example, the power limiting operation may be performed when a difference between a load value of the gearbox and a predetermined limit load threshold is greater than a predetermined value, or when a ratio between the load value of the gearbox and the predetermined limit load threshold is greater than a predetermined value, and the difference is greater than the predetermined value or a time when the ratio is greater than the predetermined value continues for a predetermined time.
The greater the above-described difference or ratio, the greater the degree of the power-limited operation performed, and the longer the difference is greater than a predetermined value or the greater the ratio is greater than the predetermined value for a predetermined time, the greater the degree of the power-limited operation performed.
The power limited operation performed by the relatively large difference or ratio and the relatively long duration may be the same as the power limited operation performed by the relatively small difference or ratio and the relatively short duration.
Exiting limited power operation or transitioning from limited power operation to a normal generator state need not be performed after the corresponding limited power operation is completed entirely. For example, during the execution of the second power limit operation, the load value of the gear box may be determined in real time, and thus, the second power limit operation state may be exited before the second power limit operation is not completely completed, and after the second power limit operation state is exited, the normal power generation state may be entered or the first power limit operation state may be entered.
As an example, the control unit 630 may perform a first power limiting operation of limiting the power of the wind turbine group to a first power in response to a ratio between a load value of the gearbox and a predetermined limit load threshold value being greater than or equal to a first threshold value and being maintained for a first predetermined time.
The control unit 630 may perform a first power limiting operation of limiting the power of the wind turbine group to a first power in response to a ratio between a load value of the gear case and a predetermined limit load threshold value being greater than or equal to a second threshold value, which may be less than the second threshold value, and for a second predetermined time, which may be less than the first predetermined time.
As an example, the first threshold may be 1.0, the second threshold may be 1.1, the first predetermined time may be 30 minutes, and the second predetermined time may be 10 minutes.
The control unit 630 may perform a second power limiting operation (e.g., 0.8 times rated power) of limiting the power of the wind turbine group to a second power in response to a ratio between the load value of the gearbox and a predetermined limit load threshold value being greater than or equal to a third threshold value T3, which may be 1.2, and for a third predetermined time, which may be less than the second predetermined time, which may be less than the first power.
The control unit 630 may perform the second power limiting operation by simultaneously reducing the generator torque and the generator rotational speed. That is, the control unit 630 may perform control of the converter and the pitch system to perform power limiting operation at the same time.
In one example, control unit 630 may restore the wind turbine to a normal power generation state or exit in response to execution of a first power limit (e.g., 0.9 times rated power), the ratio being less than a first threshold, and the ratio being less than the first threshold for a fourth predetermined time. The fourth predetermined time may be 30 minutes or 10 minutes.
In one example, control unit 630 may restore the wind turbine to a normal power generation state in response to performing a second power limit (e.g., 0.8 times rated power) operation, the ratio being less than a fourth threshold, and the ratio being less than the fourth threshold for a fifth predetermined time. The fifth predetermined time may be 10 minutes.
In one example, control unit 630 may restore the wind turbine to a normal power generation state in response to performing the first power limit (e.g., 0.9 times the rated power) operation, the ratio being less than the fifth threshold, and the ratio being less than the fifth threshold for a sixth predetermined time.
The fifth predetermined time may be 10 minutes. The fifth threshold may be less than the fourth threshold, and the fifth threshold may be 0.8 and the sixth threshold may be 0.9, however, the present disclosure is not limited thereto.
According to various embodiments of the present disclosure, an apparatus (e.g., a module or their functions) or method may be implemented by a program or instructions stored in a computer-readable storage medium. In the case where the instruction is executed by the processor, the processor may perform a function corresponding to the instruction or perform a method corresponding to the instruction (e.g., a limit load control method of a gear box). At least a portion of the modules may be implemented (e.g., executed) by a processor. At least a portion of the programming modules may include modules, programs, routines, instruction sets, and procedures for performing at least one function.
For example, a limit load control device for a wind turbine gearbox according to embodiments of the present disclosure may include a processor and a memory for storing program code and transmitting the program code to the processor; the processor is configured to execute the limit load control method of the wind turbine generator system gearbox as described above according to instructions in the program code.
The method of controlling the extreme load of the gear box according to the embodiments of the present disclosure may be implemented by software, or hardware, or a combination thereof. The hardware means may be implemented by one or more software modules for performing the operations of the various embodiments of the disclosure.
The modules or programming modules of the present disclosure may include at least one of the foregoing components with some components omitted or other components added. The operations of the modules, programming modules, or other components may be performed sequentially, in parallel, in a loop, or heuristically. Moreover, some operations may be performed in a different order, omitted, or expanded with other operations.
The computer readable storage medium and/or limit load control device of exemplary embodiments of the present disclosure may be part of a wind turbine generator set, or part of a pitch controller or pitch control system, or part of a wind power converter. The limit load control device may be provided in a main controller of the wind power plant.
An exemplary embodiment according to the present disclosure may provide a limit load controller of a gear box, which may include: a processor (not shown) and a memory (not shown), wherein the memory stores a computer program which, when executed by the processor, implements the method of controlling the limit load of a wind turbine generator set gearbox as described in the above exemplary embodiments.
A wind power generation set according to embodiments of the present disclosure may include a limit load control device as described above or a computer readable storage medium as described above.
According to the gear box limit load control method and the limit load control device of the wind generating set, the limit load of the gear box can be reduced, and the operation reliability of the wind generating set is improved.
The method and the device for controlling the limit load of the gearbox of the wind generating set can reduce the cost of the wind generating set.
Although a few exemplary embodiments of the present disclosure have been described, it would be appreciated by those skilled in the art that changes may be made in these embodiments, for example, the features of the different embodiments may be combined without departing from the principles and spirit of the disclosure, the scope of which is defined in the claims and their equivalents.
Claims (14)
1. A method of controlling a limit load of a gearbox of a wind turbine generator system, comprising:
obtaining a load value of the gearbox;
determining a numerical relationship between a load value of the gearbox and a predetermined extreme load threshold;
and performing power limiting operation on the wind generating set according to the range of the numerical relation so as to reduce the load value of the gear box.
2. The method for limiting load control of a wind turbine gearbox of claim 1, wherein the step of performing a power limiting operation on the wind turbine according to the range in which the numerical relationship is located comprises:
and executing one of a plurality of power limiting operations with different power limiting degrees on the wind generating set according to the range in which the numerical relation is located and the duration of the range in which the numerical relation is kept.
3. The method of limiting load control of a wind turbine gearbox of claim 2, wherein said step of performing one of a plurality of power limiting operations of different power limiting degrees on said wind turbine according to a range within which said numerical relationship is located and a duration for which said numerical relationship is maintained within said range comprises:
performing a first power limiting operation of limiting the wind turbine generator set to a first power in response to a ratio between a load value of the gearbox and a predetermined limit load threshold value being greater than or equal to a first threshold value and being maintained for a first predetermined time; a kind of electronic device with high-pressure air-conditioning system;
performing a first power limiting operation of limiting the wind turbine generator set to the first power in response to a ratio between a load value of the gearbox and a predetermined limit load threshold value being greater than or equal to a second threshold value and for a second predetermined time, the first threshold value being less than the second threshold value, the second predetermined time being less than the first predetermined time;
the plurality of power limited operations includes a first power limited operation.
4. A method of controlling a limit load of a gearbox for a wind turbine according to claim 3, wherein said step of performing one of a plurality of power limiting operations of different power limiting degrees on said wind turbine according to a range in which said numerical relationship is located and a duration for which said numerical relationship is maintained in said range further comprises:
performing a second power limiting operation of limiting the wind turbine generator set to a second power in response to a ratio between a load value of the gearbox and a predetermined limit load threshold value being greater than or equal to a third threshold value, the third threshold value being greater than the second threshold value, and for a third predetermined time being less than the second predetermined time, the second power being less than the first power;
the plurality of power limited operations includes a first power limited operation and a second power limited operation.
5. The method of limiting load control of a wind turbine gearbox of claim 4, wherein said step of performing one of a plurality of power limiting operations of varying degrees of power limiting on said wind turbine according to a range within which said numerical relationship is located and a duration for which said numerical relationship remains within said range further comprises:
in response to the ratio being less than the first threshold value after execution of the first power limiting operation, and the ratio being less than the first threshold value for a fourth predetermined time, returning the wind turbine to a normal power generating state, or,
in response to the ratio being less than a fourth threshold value after execution of the second power limiting operation, and the time for which the ratio is less than the fourth threshold value lasting for a fifth predetermined time, restoring the wind turbine to a normal power generation state,
wherein the fourth threshold is less than the first threshold and the fifth predetermined time is less than the fourth predetermined time.
6. A method of limiting load control of a gearbox for a wind turbine generator system according to any of claims 1 to 5, wherein the step of obtaining a load value of the gearbox comprises:
and estimating the load value of the gear box according to the operation parameters of the wind generating set during operation and the basic information of the wind generating set.
7. The method of limiting load control of a wind turbine generator system gearbox of claim 6, wherein the base information includes an impeller inertia of the wind turbine generator system, a reduction ratio of the gearbox, and a gearbox and generator inertia of the wind turbine generator system, and the operating parameters include a generator rotational speed of the wind turbine generator system and a generator electromagnetic torque of the wind turbine generator system;
the step of estimating the load value of the gear box according to the operation parameters of the wind generating set during operation and the basic information of the wind generating set comprises the following steps:
and estimating and obtaining a load value of the gear box based on a driving chain dynamics equation of the gear box according to the impeller inertia, the reduction ratio, the electromagnetic torque and the change rate of the generator rotating speed of the wind generating set.
8. A computer readable storage medium, characterized in that the computer readable storage medium stores instructions or a program which, when executed by a processor, implements a limit load control method of a wind turbine generator set gearbox according to any one of claims 1 to 7.
9. A limit load control device for a gearbox of a wind turbine generator system, comprising:
a load value acquisition unit that acquires a load value of the gear box;
a load comparison unit for determining a numerical relationship between a load value of the gearbox and a predetermined limit load threshold;
and the control unit is used for executing power limiting operation on the wind generating set according to the range of the numerical relation so as to reduce the load value of the gear box.
10. The limit load control device of a wind turbine gearbox according to claim 9, wherein the control unit performs one of a plurality of power limiting operations of different power limiting degrees on the wind turbine according to a range in which the numerical relationship is located and a duration for which the numerical relationship is maintained in the range.
11. The limit load control device of a wind turbine gearbox of claim 9, wherein the limit load control device is provided in a main controller of a wind turbine.
12. A limit load control device for a gearbox of a wind turbine generator system, comprising a processor and a memory:
the memory is used for storing program codes and transmitting the program codes to the processor;
the processor is configured to execute the limit load control method of a wind park gearbox according to any of the claims 1-7 according to instructions in the program code.
13. The limit load control device of a wind turbine gearbox of claim 12, wherein the limit load control device is disposed in a main controller of a wind turbine.
14. A wind power plant comprising a limit load control device according to any one of claims 9 to 13 or a computer readable storage medium according to claim 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210611744.1A CN117189503A (en) | 2022-05-31 | 2022-05-31 | Limit load control method, device, medium and wind generating set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210611744.1A CN117189503A (en) | 2022-05-31 | 2022-05-31 | Limit load control method, device, medium and wind generating set |
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| Publication Number | Publication Date |
|---|---|
| CN117189503A true CN117189503A (en) | 2023-12-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210611744.1A Pending CN117189503A (en) | 2022-05-31 | 2022-05-31 | Limit load control method, device, medium and wind generating set |
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| Country | Link |
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| CN (1) | CN117189503A (en) |
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