CN115977871A - Dynamic grading control method, system, medium and equipment for complex working conditions - Google Patents
Dynamic grading control method, system, medium and equipment for complex working conditions Download PDFInfo
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- CN115977871A CN115977871A CN202111197585.7A CN202111197585A CN115977871A CN 115977871 A CN115977871 A CN 115977871A CN 202111197585 A CN202111197585 A CN 202111197585A CN 115977871 A CN115977871 A CN 115977871A
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E10/72—Wind turbines with rotation axis in wind direction
Abstract
The invention discloses a dynamic grading control method, a dynamic grading control system, a medium and a device under complex working conditions, wherein an application scene comprises a mountain wind field, and the method comprises the following steps: 1) Acquiring state information of the wind turbine generator, wherein the state information comprises the rotating speed of a generator, the rotating speed change rate of the generator, a pitch angle, a wind direction and a wind speed; 2) Classifying the working conditions of the wind turbine generator according to the severity of the working conditions according to the state information of the wind turbine generator; 3) And entering a corresponding control mode to perform hierarchical control on the wind turbine generator according to the corresponding hierarchical working condition of the wind turbine generator. The invention has the advantages of identifying complex working conditions, carrying out dynamic grading control, reducing the load borne by the unit, improving the safety performance of the unit and the like.
Description
Technical Field
The invention mainly relates to the technical field of wind turbine generators, in particular to a dynamic grading control method, system, medium and equipment for complex working conditions.
Background
The mountain wind field is influenced by the terrain, the wind speed and the wind direction characteristics are completely different from those of a plain wind field, the wind conditions are very complex, the wind direction changes frequently, the wind speed changes rapidly, and the unit operates in the terrain type wind field environment, so that higher requirements are provided for a control strategy of the unit at a specific site. The wind direction changes for a short time and the large amplitude value changes, the yaw executing mechanism acts, the plane of the wind wheel still cannot be accurately aligned with the incoming direction of the wind, the deviation of the wind direction is still large, the superposed wind speed changes, and the wind turbine generator set runs under the wind condition, bears the load of the rotating hub and the load of the yaw bearing, and affects the reliability and the service life of the wind turbine generator set.
The invention patent of application publication number CN202110137922.7 is to identify the extreme gust condition by monitoring the rotating speed of the generator in real time and then to perform dynamic thrust reduction control on the wind wheel surface. The invention patent of application publication No. CN202110328164.7 adopts the rotating speed measuring signal to judge the extreme working condition, and then enters the power limiting state.
In summary, in the existing control technology, the identification method of the extreme wind condition and the control method after identification are different, some manufacturers identify the extreme wind condition by performing correlation processing on the rotation speed of the generator and the change rate of the rotation speed of the generator or turbulence intensity, but do not identify frequent changes of the wind direction, and after the extreme wind condition is identified, the manufacturers perform descending operation through different control strategies, and cannot perform dynamic hierarchical control, so that the operation performance of the unit is sacrificed to a certain extent.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: aiming at the problems in the prior art, the invention provides a complex working condition dynamic hierarchical control method, a complex working condition dynamic hierarchical control system, a complex working condition dynamic hierarchical control medium and complex working condition dynamic hierarchical control equipment.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
a dynamic hierarchical control method for complex working conditions comprises a mountain wind field in an application scene, and comprises the following steps:
1) Acquiring state information of the wind turbine generator, wherein the state information comprises the rotating speed of a generator, the rotating speed change rate of the generator, a pitch angle, a wind direction and a wind speed;
2) Classifying the working conditions of the wind turbine generator according to the severity of the working conditions according to the state information of the wind turbine generator;
3) And entering a corresponding control mode to perform hierarchical control on the wind turbine generator according to the corresponding hierarchical working condition of the wind turbine generator.
Preferably, in step 2), the operating conditions of the wind turbine generator are classified according to the severity of the operating conditions, and the operating conditions are respectively a mild mode, a deep mode and an extreme severe mode.
Preferably, in step 3), in the light mode, the corresponding control mode is: and adjusting a shaft power set value, reducing the shaft power to a mild mode shaft power set point according to the slope, adjusting a torque and a rotating speed set point, and changing the rotating speed set point according to the slope to avoid transient impact caused by rapid change.
Preferably, the duration of the corresponding control mode is timed, and the corresponding control mode is exited after the timed duration reaches the preset time and the exit condition is met.
Preferably, in step 3), in the depth mode, the corresponding control mode is: and carrying out variable pitch control, and superposing a pitch angle compensation value on the basis of the current pitch angle to enable the unit to dynamically operate in a variable rotating speed interval so as to reduce the capture of energy under severe working conditions.
Preferably, in the deep mode, the duration of the corresponding control mode is timed, and after the timed time reaches the preset time and the exit condition is met, the corresponding control mode is exited.
Preferably, in step 3), in the extreme severe mode, the corresponding control mode is: the unit is actively stopped, and the stopping action is executed.
Preferably, in step 1), t is carried out on the wind speed acquired in real time 1 Duration filtering, wind direction t 2 And (5) duration filtering processing.
Preferably, in step 2), the state information of the wind turbine generator is compared with a preset threshold table to obtain a complex working condition evaluation value, and then a corresponding grade is obtained according to the complex working condition evaluation value.
The invention also discloses a dynamic grading control system for complex working conditions, wherein the application scene comprises a mountain wind field, and the dynamic grading control system comprises the following components:
the system comprises a first module, a second module and a third module, wherein the first module is used for acquiring state information of the wind turbine generator, and the state information comprises the rotating speed of a generator, the rotating speed change rate of the generator, a pitch angle, a wind direction and a wind speed;
the second module is used for grading the working conditions of the wind turbine generator according to the state information of the wind turbine generator and the severity of the working conditions;
and the third module is used for entering a corresponding control mode to carry out hierarchical control on the wind turbine generator according to the corresponding hierarchical working condition of the wind turbine generator.
The invention further discloses a computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, performs the steps of the complex regime dynamic hierarchical control method as described above.
The invention also discloses computer equipment which comprises a memory and a processor, wherein the memory is stored with a computer program, and the computer program executes the steps of the complex working condition dynamic hierarchical control method when being executed by the processor.
Compared with the prior art, the invention has the advantages that:
according to the method, wind direction and wind speed information are acquired aiming at the frequent wind direction change phenomenon at a specific site, the complex working conditions are identified by combining the rotating speed of the generator, the rotating speed change rate of the generator and the pitch angle, a complex working condition evaluation mechanism is established, and according to the index difference of the evaluation values, the unit operates in different control modes, so that the load borne by the unit is reduced, and the safety performance of the unit is improved.
Drawings
FIG. 1 is a flow chart of an embodiment of the method of the present invention.
Fig. 2 is a schematic diagram of complex condition recognition in the present invention.
FIG. 3 is a schematic diagram of a dynamic hierarchical control method under complex conditions according to the present invention.
Detailed Description
The invention is further described below with reference to the figures and the specific embodiments of the description.
As shown in fig. 1, the complex condition dynamic hierarchical control method of the present embodiment, wherein the specific scene includes a mountain wind field, includes the steps of:
1) Acquiring state information of a wind turbine generator, wherein the state information comprises the rotating speed of a generator, the rotating speed change rate of the generator, a pitch angle, a wind direction and a wind speed;
2) Classifying the working conditions of the wind turbine generator according to the severity of the working conditions according to the state information of the wind turbine generator;
3) And entering a corresponding control mode to perform hierarchical control on the wind turbine generator according to the corresponding hierarchical working condition of the wind turbine generator.
According to the method, wind direction and wind speed information are acquired aiming at the frequent wind direction change phenomenon at a specific site, the complex working conditions are identified by combining the rotating speed of the generator, the rotating speed change rate of the generator and the pitch angle, a complex working condition evaluation mechanism is established, and according to the index difference of the evaluation values, the unit operates in different control modes, so that the load borne by the unit is reduced, and the safety performance of the unit is improved.
In an embodiment, as shown in fig. 2, in step 1), the wind speed and wind direction information is collected in real time through a wind vane and a wind speed meter, and the wind speed collected in real time is subjected to t 1 Duration filtering, wind direction t 2 Duration filtering processing; and then the generator rotating speed, the generator rotating speed change rate, the pitch angle, the wind speed and the wind direction information after filtering processing of the wind turbine generator form state information of the wind turbine generator together, so that accurate identification of working conditions is realized. The change rate of the rotating speed of the generator is obtained by dividing the difference between the rotating speed of the generator measured at the previous moment and the rotating speed of the generator at the current moment by the control period.
In a specific embodiment, as shown in fig. 3, in step 2), a complex working condition evaluation mechanism is established, the state information of the wind turbine generator is compared with a preset threshold value table, and the working condition is evaluated in a grading manner; and the complex working condition evaluation mechanism determines complex working condition evaluation values which are divided into a, B and C according to the working condition severity, wherein the evaluation value corresponding to a mild mode with a class a as the complex working condition, the evaluation value corresponding to a deep mode with a class B as the complex working condition is B, and the evaluation value corresponding to a mode with a class C as the extremely severe working condition is C. Of course, in other embodiments, the classification of four or more complex operating conditions may be selected based on the actual situation.
In one embodiment, in step 3), when the unit is under different degrees of complex operating conditions, the unit enters different control modes. If the complex working condition evaluation value is AThe light mode corresponds to the control mode: the set value of the shaft power is adjusted, the shaft power is reduced to a light mode shaft power set point according to the slope, the torque and rotating speed set points are adjusted, the rotating speed set points also need to be changed according to the slope, and transient impact caused by rapid change is avoided. To avoid frequent entry and exit, a timer is used to count time and continuously run t in the mode 3 And the time length is long, the operation is quitted to a normal operation mode when the quit condition is met, the environment is continuously severe, and another control mode needs to be entered.
The complex working condition evaluation value is B, the depth mode is adopted, the variable pitch control is carried out, the pitch angle compensation value is superposed on the basis of the current pitch angle, the unit dynamically runs in a variable rotating speed interval, the capture of energy under the severe working condition is reduced, and in order to avoid frequent entering and exiting, a timer is required to time and continuously run in the mode for t 4 And the time length is long, the operation is quitted to a normal operation mode when the quit condition is met, and the operation needs to enter another control mode when the external environment working condition changes. If the complex working condition evaluation value is that C is larger than a preset limit protection threshold value, the unit should be actively stopped, and stop action is executed, so that the unit is prevented from bearing impact of large load for a long time, and the safety of the unit is protected.
The invention also discloses a dynamic grading control system for complex working conditions, wherein the specific scene comprises a mountain wind field, and the control system comprises:
the system comprises a first module, a second module and a third module, wherein the first module is used for acquiring state information of the wind turbine generator, and the state information comprises the rotating speed of a generator, the rotating speed change rate of the generator, a pitch angle, a wind direction and a wind speed;
the second module is used for grading the working conditions of the wind turbine generator according to the state information of the wind turbine generator and the severity of the working conditions;
and the third module is used for entering a corresponding control mode to carry out hierarchical control on the wind turbine generator according to the corresponding hierarchical working condition of the wind turbine generator.
The control system of the present invention, corresponding to the control method described above, also has the advantages described above for the control method.
The invention also discloses a computer readable storage medium on which a computer program is stored, which, when being executed by a processor, performs the steps of the complex condition dynamic hierarchical control method as described above. The invention further discloses a computer device comprising a memory and a processor, wherein the memory is stored with a computer program, and the computer program executes the steps of the complex working condition dynamic hierarchical control method when being executed by the processor.
All or part of the flow of the method of the embodiments may be implemented by a computer program, which may be stored in a computer-readable storage medium and executed by a processor, to implement the steps of the embodiments of the methods. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer readable medium may include: any entity or device capable of carrying computer program code, recording medium, U.S. disk, removable hard disk, magnetic disk, optical disk, computer Memory, read-Only Memory (ROM), random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution media, and the like. The memory may be used to store computer programs and/or modules, and the processor may implement various functions by executing or executing the computer programs and/or modules stored in the memory and invoking data stored in the memory. The memory may include high speed random access memory, and may also include non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), at least one magnetic disk storage device, a Flash memory device, or other volatile solid state storage device.
The above are only preferred embodiments of the present invention, and the scope of the present invention is not limited to the above examples, and all technical solutions that fall under the spirit of the present invention belong to the scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may be made by those skilled in the art without departing from the principle of the invention.
Claims (12)
1. A dynamic hierarchical control method for complex working conditions is applied to a mountain wind field and is characterized by comprising the following steps:
1) Acquiring state information of the wind turbine generator, wherein the state information comprises the rotating speed of a generator, the rotating speed change rate of the generator, a pitch angle, a wind direction and a wind speed;
2) Grading the working conditions of the wind turbine generator according to the severity of the working conditions according to the state information of the wind turbine generator;
3) And entering a corresponding control mode to carry out hierarchical control on the wind turbine generator according to the hierarchical working condition corresponding to the wind turbine generator.
2. The dynamic grading control method for complex working conditions according to claim 1, wherein in the step 2), the working conditions of the wind turbine generator are graded according to the severity of the working conditions, and the working conditions are respectively a mild mode, a deep mode and an extremely severe mode.
3. The dynamic hierarchical complex-condition control method according to claim 2, characterized in that in step 3), in the light mode, the corresponding control mode is: and adjusting a shaft power set value, reducing the shaft power to a mild mode shaft power set point according to the slope, adjusting a torque and a rotating speed set point, and changing the rotating speed set point according to the slope so as to avoid transient impact caused by rapid change.
4. The dynamic hierarchical control method for complex operating conditions according to claim 3, characterized in that in the light mode, the duration of the corresponding control mode is timed, and after the timed duration reaches a preset time and the exit condition is met, the corresponding control mode exits.
5. The complex condition dynamic hierarchical control method according to any one of claims 2 to 4, characterized in that in step 3), in the deep mode, the corresponding control mode is: and carrying out variable pitch control, and superposing a pitch angle compensation value on the basis of the current pitch angle to enable the unit to dynamically operate in a variable rotating speed interval so as to reduce the capture of energy under severe working conditions.
6. The dynamic hierarchical control method for complex operating conditions according to claim 5, characterized in that in the deep mode, the duration of the corresponding control mode is timed, and after the timed duration reaches a preset time and the exit condition is met, the corresponding control mode exits.
7. The complex working condition dynamic grading control method according to any one of claims 2-4, wherein in step 3), in the extreme severe mode, the corresponding control mode is: the machine set is actively stopped, and the stopping action is executed.
8. The dynamic grading control method for complex operating conditions according to any one of claims 1-4, wherein in step 1), t is performed on the wind speed collected in real time 1 Duration filtering, wind direction t 2 And (5) duration filtering processing.
9. The method for controlling the dynamic grading of the complex working conditions according to any one of claims 1 to 4, wherein in the step 2), the complex working condition evaluation value is obtained by comparing the state information of the wind turbine generator with a preset threshold value table, and then the corresponding grading is obtained according to the complex working condition evaluation value.
10. A dynamic hierarchical control system for complex working conditions, wherein an application scene comprises a mountain wind field, is characterized by comprising:
the system comprises a first module, a second module and a third module, wherein the first module is used for acquiring state information of the wind turbine generator, and the state information comprises the rotating speed of a generator, the rotating speed change rate of the generator, a pitch angle, a wind direction and a wind speed;
the second module is used for grading the working conditions of the wind turbine generator according to the state information of the wind turbine generator and the severity of the working conditions;
and the third module is used for entering a corresponding control mode to carry out hierarchical control on the wind turbine generator according to the corresponding hierarchical working condition of the wind turbine generator.
11. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the complex regime dynamic hierarchical control method as claimed in any one of claims 1 to 9.
12. A computer arrangement comprising a memory and a processor, the memory having stored thereon a computer program, characterized in that the computer program, when being executed by the processor, is adapted to carry out the steps of the complex regime dynamic hierarchical control method according to any one of claims 1-9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111197585.7A CN115977871A (en) | 2021-10-14 | 2021-10-14 | Dynamic grading control method, system, medium and equipment for complex working conditions |
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| CN202111197585.7A CN115977871A (en) | 2021-10-14 | 2021-10-14 | Dynamic grading control method, system, medium and equipment for complex working conditions |
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