CN111828249A - Wind power plant wake flow control system based on externally-hung controller - Google Patents
Wind power plant wake flow control system based on externally-hung controller Download PDFInfo
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/0204—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor for orientation in relation to wind direction
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D17/00—Monitoring or testing of wind motors, e.g. diagnostics
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/04—Automatic control; Regulation
- F03D7/042—Automatic control; Regulation by means of an electrical or electronic controller
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2270/00—Control
- F05B2270/30—Control parameters, e.g. input parameters
- F05B2270/32—Wind speeds
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2270/00—Control
- F05B2270/30—Control parameters, e.g. input parameters
- F05B2270/321—Wind directions
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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Abstract
The invention provides a wind power plant wake flow control system, which comprises: the system comprises an external hanging controller and a sector control management subsystem, wherein the external hanging controller is used for receiving a wake flow control command of the sector control management subsystem and entering the following active yawing flow: acquiring wind condition information borne by a current wind turbine generator; traversing and comparing the current wind condition information of the wind turbine generator with prestored yaw angle correction table information to obtain an optimal yaw angle suitable for the current wind condition of the wind turbine generator; and calculating to obtain a target wind direction input value according to the optimal yaw angle and the current wind direction angle of the wind turbine generator and sending the target wind direction input value to the original controller so that the original controller executes active yaw action according to the target wind direction input value. The external-hanging controller is added to replace the original controller to finish yaw angle correction calculation, and the calculated adjustment value is sent to the original controller, so that the original controller executes active yaw motion according to the adjustment value, the influence of wake flow on the wind turbine generator is further improved, and the generated energy is improved.
Description
Technical Field
The invention relates to the technical field of wind power plants, in particular to a wind power plant wake control system based on an external controller and an implementation method.
Background
The wake effect is an important influence factor of the economic benefit of the wind power plant, and is easy to cause the reduction of the wind speed in a wake area and the increase of turbulence, so that the power loss and the fatigue load of a downstream wind turbine are increased, and the consequences of the vibration, the mechanical damage and the like of the turbine are caused. The yaw angle of the units in the wind power plant is optimally managed, the distribution of wind blowing to the rear row of units in space and speed is changed, and wake flow improvement can be achieved to a certain degree.
Under different inflow winds, a wake effect may exist between a front row unit and a rear row unit in a wind power plant, and under a specific wind direction scene, when the wake of the front row unit is not completely diffused, the wake of the front row unit still reaches a downstream unit, so that the load characteristic is influenced, and the power generation amount loss of the rear row unit is caused. Actively changing the yaw angle of each unit is an important way to reduce the wake effect. At present, large wind power plant active yaw control is lacked in China, and a unit control strategy is single. Therefore, before the wind direction signal enters the main controller, the wind direction signal needs to be artificially corrected according to the off-line manufactured yaw angle optimization table, so that the unit actively yaws, more wind energy is captured under the influence of wake flow, and the power generation capacity of the whole wind power plant is improved.
Disclosure of Invention
The invention aims to provide a wind power plant wake control system based on an externally-mounted controller, which can finish yaw angle correction calculation by adding the externally-mounted controller instead of an original controller under the condition of not changing the operation logic of the original controller of a wind power plant, and send a target wind direction input value obtained by calculation to the original controller, so that the original controller executes active yaw action according to the target wind direction input value, and further the influence of wake on the wind power plant is improved.
In order to achieve the above object, the present invention provides a wind farm wake control system, comprising:
the system comprises an external controller and a sector control management subsystem; the externally-hung controller is arranged in the wind turbine generator, is respectively connected with the field station sector control management subsystem and an original controller of the current wind turbine generator, and is used for receiving wake flow control instructions of the sector control management subsystem and entering an active yaw flow, wherein the active yaw flow comprises:
acquiring wind condition information borne by a current wind turbine generator;
traversing and comparing the current wind condition information of the wind turbine generator with prestored yaw angle correction table information, and determining a group corresponding to the current wind condition information to obtain an optimal yaw angle suitable for the current wind condition of the wind turbine generator;
calculating to obtain a target wind direction input value according to the optimal yaw angle and the current wind direction angle borne by the wind turbine generator; and
and sending the target wind direction input value to the original controller so that the original controller executes active yawing motion according to the target wind direction input value.
Optionally, the plug-in controller is further connected with a wind speed and direction measuring device of the current wind turbine, and the acquiring of the wind condition borne by the current wind turbine includes receiving the wind speed and the wind direction provided by the wind speed and direction measuring device.
Optionally, the anemometry of wind speed includes the anemometry information that 2 anemometers of wind speed detected and obtained, 2 anemometers of wind speed include: ultrasonic anemorumbometers and mechanical anemorumbometers.
Optionally, the wind direction information detected by the 2 anemorumbometers comprises a wind direction a and a wind direction B;
the wind direction A and the wind direction B are both the actually measured wind direction of the current wind turbine generator and participate in correction calculation to obtain a corresponding target wind direction input value A1And target wind direction input value B1(ii) a Target wind direction input value A1When the main controller participates in executing the yaw action process, the target wind direction input value B1Only for with A1For comparison.
Optionally, the plug-in controller is further configured to send the current wind condition information of the wind turbine generator to the station sector control management subsystem.
Optionally, the plug-in controller is further configured to quit the active yawing flow according to a wake flow control quit instruction sent by the field station sector control management subsystem, and execute the following operations when quitting the active yawing flow:
and acquiring the wind condition borne by the current wind turbine generator, and forwarding the wind condition borne by the current wind turbine generator to an original controller of the current wind turbine generator.
The wind power plant wake flow control system provided by the invention comprises a field station sector control management subsystem, and is used for executing the following operations:
acquiring wind condition information of corresponding wind turbine generator positions sent by each externally-mounted controller;
determining whether the wind direction of the corresponding wind turbine generator is in a stable state or not according to the wind condition information, and determining the current average wind direction DnAnd whether the wake flow control command is located in a sector management wind direction setting area omega or not and sending the wake flow control command to the plug-in controller.
Optionally, according to time period t1Average value D of downwind direction1,D2,…,DnCalculating a difference value Delta D between the average values and a reference difference value DrefIn the case of Δ D < DrefThen, it indicates the time period t1The wind direction of the unit is in a stable state;
wherein Δ D ═ Dn-Dn-1|+…+|D2-D1|。
Optionally, before the sector control management subsystem sends the wake flow control instruction to the add-on controller, the method further includes determining a current average wind direction D in a steady statenWhether the wind direction is located in a sector management wind direction setting area omega or not is judged, if yes, a wake flow control starting instruction is sent to the external-hanging controller;
and the sector management wind direction setting area omega is a wind direction area of the unit affected by wake flow.
Optionally, the station sector control management subsystem is further configured to determine the current wind direction average value DnAnd sending a wake control quit instruction to the external controller under the condition that the wake control quit instruction does not fall into the range of the sector management wind direction setting area omega.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural diagram of a wind farm wake control system provided by the present invention;
FIG. 2 is a schematic connection diagram of a wind farm wake control system provided by the present invention;
FIG. 3 is a schematic diagram of a wake flow control flow of the plug-in controller provided by the present invention.
Description of the reference numerals
Sector control management subsystem of 10 external-hanging controller 20 field station
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
Fig. 1 shows a schematic structural diagram of a wake control system of a wind farm provided by the present invention, and as shown in fig. 1, the present invention accesses an external controller 10, such as a PLC, in front of a main controller (original controller) of each unit in the wind farm on the basis of not changing a control logic algorithm in the main controller. And the wind speed and direction signals transmitted into the main controller are actively changed through the logic calculation of the externally-hung PLC, so that the expected yaw angle of each wind turbine generator is obtained, and finally, the active yaw action is realized. Firstly, an externally-hung PLC is installed in an engine room of each wind turbine in a wind power plant, and the externally-hung PLC is respectively connected with a field station sector control management subsystem and an original controller of a current wind turbine so as to communicate with the original controller of the current wind turbine and the field station sector control management subsystem, specifically, the externally-hung PLC can enter an active yawing flow according to a wake flow control starting instruction sent by the field station sector control management subsystem, and then the following active yawing flow is executed:
acquiring the wind condition borne by the current wind turbine generator;
traversing and comparing the current wind condition information of the wind turbine generator with pre-stored yaw angle correction table information, determining a group corresponding to the current wind condition information, and obtaining an optimal yaw angle suitable for the current wind condition of the wind turbine generator (wherein the yaw angle correction table comprises a plurality of groups of data, and each group of data comprises wind condition data such as wind speed and wind direction and the like and corresponding yaw angle correction amount data);
according to the optimal yaw angle and the current wind direction angle of the wind turbine generator, a target wind direction input value, namely the actual receiving value of the wind direction angle of the main controller of the wind turbine generator, is obtained through summation operation of the optimal yaw angle and the current wind direction angle; and
and sending the target wind direction input value to the original controller so that the original controller executes active yawing motion according to the target input value.
And selecting a PLC with the same type as the original wind turbine main controller, and ensuring the consistency of indexes such as data scanning speed, refreshing data frequency and the like. And reserving an original communication connection frame between the devices of the wind power plant, and transmitting data by using an original data communication interface. On the basis, data interaction is realized between the externally-hung PLC and the field station sector control management subsystem 20 in an Ethernet communication mode, and the lower computer of the wind turbine generator and the upper computer of the field station are connected with the optical fiber of the wind power plant through a switch in an Ethernet loop, so that centralized monitoring and data transmission in the wind power plant are guaranteed.
In the embodiment of the invention, the plug-in PLC is also connected with a wind speed and direction measuring device of the current wind turbine generator to obtain the wind speed and the wind direction of the current position of the wind turbine generator provided by the wind speed and direction measuring device, and further, the plug-in PLC determines the wind condition of the current wind turbine generator according to the wind speed and the wind direction of the current position of the wind turbine generator. The wind speed and direction information can be collected from real-time data measured by sensors such as a mechanical anemorumbometer and an ultrasonic anemorumbometer, and comprises wind speed and direction information obtained by detecting 2 anemorumbometers. The wind direction information comprises a wind direction signal A and a wind direction signal B, the wind direction signal A can be a wind direction signal provided by a mechanical anemorumbometer, and the wind direction signal B can be a wind direction signal provided by an ultrasonic anemorumbometer. The wind direction signal A and the wind direction signal B are both actual measurement wind direction signals of the current wind turbine generator and participate in correction calculation of the externally-hung controller to obtain a target wind direction input value A1And target wind direction input value B1. Target wind direction input value A1When the main controller participates in executing the yaw action process, the target wind direction input value B1For with A1Comparison was madeAnd the reliability of the wind direction signal acquired by the measuring device is ensured.
And when acquiring the wind condition borne by the current wind turbine generator, the external PLC arranged in each wind turbine generator sends the wind condition borne by the current wind turbine generator to the station sector control management subsystem, so that the station sector control management subsystem can master the wind condition borne by each wind turbine generator in real time, and further carry out corresponding wake flow control operation.
Fig. 2 shows a connection schematic diagram of the wind farm wake control system provided by the present invention, and as shown in fig. 2, the system includes a farm sector control management subsystem 20 and a plurality of wind turbine external controllers. The field station sector control management subsystem 20 is configured to acquire wind conditions of the positions of the corresponding wind turbines, which are sent by the external-hanging controllers of the connected wind turbines, determine wind direction information according to the wind conditions, and determine whether to control the corresponding wind turbines to start wake control according to the wind direction information of the positions of the wind turbines. Specifically, the station sector control and management subsystem 20 determines the wind direction of the position of the wind turbine generator set in the time period t1The current average wind direction D is obtained by filtering according to the sliding average valuenAnd if the current position is within the sector management wind direction setting area omega, sending a wake flow control starting instruction to the external controller.
Fig. 3 is a schematic view illustrating a wake flow control procedure of the plug-in controller provided by the present invention, and as shown in fig. 3, before the site sector control management subsystem 20 sends a wake flow control start instruction to the plug-in controller, the site sector control management subsystem 20 is further configured to perform the following operations:
the method comprises the steps that wind condition information of corresponding wind turbine generator positions sent by all externally-mounted controllers is collected in real time;
by setting the units in time t1The wind direction signal is subjected to the minute-level sliding average filtering operation, and t is obtained through calculation1Average value D of downwind time1,D2,…,Dn(where t is1Setting the time for the wind direction data to be 5min, collecting second-level wind direction data of the unit, calculating to obtain wind direction data under 1min, and carrying out filtering operation under 5min time scale, so that nA value of 5);
by comparing the difference Δ D between the mean values with a reference difference DrefThe magnitude relationship between them, if Δ D < DrefThen determining the unit in the time period t1The downwind direction is in a stable state;
wherein Δ D ═ Dn-Dn-1|+…+|D2-D1|。
Determining the current average wind direction D when the wind direction is in a steady statenWhether the set falls into a sector management wind direction setting region omega (omega is composed of a plurality of wind direction intervals) or not is judged, and whether the set meets wake flow control starting conditions or not under the wind direction condition of the time period is judged;
at the current average wind direction DnAnd under the condition that the wind direction falls into the set region omega of the sector management wind direction of the current wind turbine generator, triggering the operation of sending a wake flow control starting instruction to the external-hanging controller.
Specifically, the wake-controlled launch/exit function logic includes:
the method comprises the steps of obtaining operation data of a first-exhaust wind turbine generator, wherein the operation data comprise wind condition information of corresponding wind turbine generators, including wind speed, wind direction and the like.
According to the first-row unit in the time period t1The wind direction data is subjected to a minute-level sliding average filtering operation for a time period t1In 5min, the unit collects the wind direction signals into second-level signals, and the second-level data is preprocessed in a minute-level mode.
According to the moving average filtering method, calculating to obtain a time period t1Average value D of downwind direction1,D2,…,Dn(n is 5 in this example), which is differenced to give Δ D and is compared with a reference difference DrefAnd (6) carrying out comparison. If Δ D < DrefJudging that the wind direction borne by the unit is in a stable state in the time period and has the precondition of executing wake flow control; if Δ D>DrefIf the wind direction borne by the unit is unstable in the time period and the precondition of executing the wake flow control is not met, the wake flow control is not executed, and the updating time period t is continued1The process of (2).
Determining the current average wind direction D under the condition that the wind condition borne by the unit is stablenWhether it is within the sector management wind direction setting region omega, i.e. DnE.g. omega. If the current time is within the range, judging that the sector management condition is met, starting an active yawing process, and sending a wake flow control starting instruction to an external-hanging controller of a corresponding wind turbine generator by the field station sector control management subsystem 20; if the current is not within the range, judging that the sector management condition is not met, namely, not executing wake flow control, and enabling the wind turbine generator to still act according to the logic of the original main controller.
When in the time period t1The wake flow control is completed internally, and the time period t is updated after the unit completes the active yaw action1If the wind direction is stable and the wind direction average value D is still satisfied in the updated time periodnIf the sector management wind direction threshold range is still met, the wake flow control is continuously executed; if the threshold range setting is not met or the wind direction is unstable, the wake flow control is not executed, and a wake flow control exit instruction is sent to the corresponding plug-in controller, so that the wind turbine generator corresponding to the plug-in controller exits the active yaw process.
After the external controller receives the wake control starting instruction, the external controller 10 performs traversal comparison on the current wind condition information of the wind turbine generator and the pre-stored yaw angle correction table information, determines the grouping corresponding to the current wind condition information, and obtains the optimal yaw angle suitable for the current wind condition of the wind turbine generator.
The yaw angle correction table can be pre-made, and specifically, an optimization algorithm is adopted to determine a field-level optimal yaw angle for tabulation. Firstly, determining an optimal yaw angle according to unit historical data, a wake flow model and an optimization algorithm, making a table in a data form, and storing the table in an external PLC. The table comprises the corresponding relation between the wind conditions (wind speed and wind direction) meeting the sector management and the optimal yaw angle, the external PLC conducts interval processing on the table, reads the table and selects the optimal yaw angle to achieve wake control.
Due to the fact that actual turbulent wind conditions are complex, the data volume of wind speed and wind direction corresponding to a certain moment is huge, and the data volume needs to be sorted in an external PLC in a regionalization mode. According to the actual wind condition, the method takes the inflow wind direction as a standard to carry out interval division, the wind direction is-180 degrees, 15 degrees are set as an interval, such as 0-15 degrees, 16-30 degrees, 166-180 degrees and the like, so that the corresponding optimal yaw angle is interval, and the table searching time is saved.
The logical operations of the active yaw action include: reading the beacon according to the actually measured current wind speed and direction signal and the interval processing table to obtain the corresponding optimal yaw angle under the wind condition; and then, performing logical operation by using the optimal yaw angle and the current wind direction angle of the wind turbine generator, reversely calculating a target wind direction input value to be input to a main controller of the wind turbine generator, and transmitting the target wind direction input value and an original wind speed signal into the main controller, so that the wind turbine generator completes an active yaw action, and wake flow control based on a table look-up method is realized.
The sector management control subsystem monitors and analyzes wind speed and wind direction data, judges wind conditions (inflow wind direction and wind speed) of the first-row units and issues wake flow control starting/exiting instructions to complete active/passive yaw actions. When the wind condition meets the condition and is in a wake flow control starting mode, the actual wind speed and direction signals are transmitted to the external PLC, the analog signals are converted into digital signals in the external PLC and are subjected to correction logical operation, the corrected wind speed and direction signals are transmitted to the main controller of the unit through the Ethernet by utilizing a TCP/IP protocol, and finally the main controller transmits yaw instructions to the yaw executing mechanism through the original control logical setting to realize active yaw action.
And when the wind condition does not meet the condition, namely the external-hanging controller is in the wake flow control stop mode, the control flow is consistent with the original flow. The external PLC receives the actual wind speed and direction signals, does not perform correction calculation inside, directly transmits analog quantity to the main unit controller through the analog quantity output module to perform logic operation, and finally realizes passive yaw through the yaw executing mechanism. The yawing action is determined by the actual wind speed and the actual wind direction acting on the wind turbine generator at present, and external intervention optimization operation is not included.
The protection logic of the wind turbine generator comprises the following steps:
each unit cabin is provided with an ultrasonic anemorumbometer and a mechanical anemorumbometer. Under the condition that an external controller is not additionally arranged, a wind direction signal A and a wind direction signal B are transmitted to the main controller, wherein only the wind direction signal A is subjected to logic operation, and the wind direction signal B is used for being compared with the wind direction signal A to judge whether the anemorumbometer normally works. For example, when the wind speed is greater than 9m/s, the deviation between the wind direction signal A and the wind direction signal B is greater than 40 degrees; or when the wind speed is less than 9m/s, the deviation between the wind direction signal A and the wind direction signal B is more than 30 degrees, which indicates that the wind vane signal is inaccurate or the wind vane is damaged accidentally. At this time, the wind turbine is stopped for safety reasons.
The external hanging controller is additionally arranged, after the wind direction signal A and the wind direction signal B are transmitted to the external hanging controller, when the external hanging controller fails, both the wind direction signal A and the wind direction signal B cannot be transmitted to the main controller, and the main controller judges that the wind direction signals A and B are interrupted and takes a stopping measure. If the external controller is normal, the condition is similar to the condition that two signals are directly connected to the main controller, when the difference value of the two signals exceeds the set value of the wind turbine generator, the anemoscope is indicated to have problems, and a shutdown measure is taken.
When the logic operation of the plug-in controller is wrong, an error signal is transmitted to the main controller, and the active yaw control instruction is wrong. Because the control logic of the original yaw system of the wind turbine generator is not changed, the cable untwisting function of the wind turbine generator can still play a role, the wind turbine generator can be untwisted when necessary, and the wind turbine generator can be stopped emergently when serious.
The invention researches the realization of the wake flow control technology of the wind power plant, adds an external-hanging controller 10 in the wind power plant, realizes the communication connection between a unit level and a station level, realizes the active yaw action by artificially correcting a wind direction signal aiming at the wind speed and the wind direction borne by a single unit, and finishes the wake flow control. The method has the advantages that the performance difference between different units of a wind field and under different wind conditions of the same unit can be comprehensively considered, the active yawing action of the multiple units is considered from the aspect of hardware implementation, and the wake flow cooperative control of the wind power plant is realized.
In field application, the optimized yaw signal from the wind field level to the unit level is transmitted to each external-hanging controller 10 and acts on each unit, so that each unit can realize rapid, stable and accurate tracking when executing active yaw action, and the yaw control quality of the unit is optimized and improved.
As shown in fig. 3, in the wake flow control flow diagram of the plug-in controller, when the wind farm wake flow control device is in the self-control state, the plug-in controller 10 (plug-in PLC) respectively forwards the acquired wind conditions borne by the current wind turbine to the original wind turbine controller and the farm sector control management subsystem 20. And entering an active yaw process when receiving a wake control starting instruction sent by the station sector control management subsystem 20, controlling the current wind turbine generator to perform the active yaw operation, and exiting the active yaw process when receiving a wake control exiting instruction.
The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (10)
1. A wind farm wake control system, characterized in that the system comprises:
the system comprises an external controller and a sector control management subsystem;
the externally-hung controller is arranged in the wind turbine generator, is respectively connected with the field station sector control management subsystem and an original controller of the current wind turbine generator, and is used for receiving wake flow control instructions of the sector control management subsystem and entering an active yaw flow, wherein the active yaw flow comprises:
acquiring wind condition information borne by a current wind turbine generator;
traversing and comparing the current wind condition information of the wind turbine generator with prestored yaw angle correction table information, and determining a group corresponding to the current wind condition information to obtain an optimal yaw angle suitable for the current wind condition of the wind turbine generator;
calculating to obtain a target wind direction input value according to the optimal yaw angle and the current wind direction angle borne by the wind turbine generator; and
and sending the target wind direction input value to the original controller so that the original controller executes active yawing motion according to the target wind direction input value.
2. The system according to claim 1, wherein the plug-in controller is further connected with a wind speed and direction measuring device of the current wind turbine, and the acquiring of the wind condition of the current wind turbine comprises receiving the wind speed and the wind direction provided by the wind speed and direction measuring device.
3. The system of claim 2, wherein the anemometry comprises anemometry information detected by 2 anemometers, and the 2 anemometers comprise: ultrasonic anemorumbometers and mechanical anemorumbometers.
4. The system according to claim 3, wherein the wind direction information detected by the 2 anemorumbometers comprises a wind direction A and a wind direction B;
the wind direction A and the wind direction B are both the actually measured wind direction of the current wind turbine generator and participate in correction calculation to obtain a corresponding target wind direction input value A1And target wind direction input value B1(ii) a Target wind direction input value A1When the main controller participates in executing the yaw action process, the target wind direction input value B1Only for with A1For comparison.
5. The system according to claim 1, wherein the plug-in controller is further configured to send information on wind conditions experienced by the current wind turbine to the site sector control management subsystem.
6. The system according to claim 1, wherein the strap-on controller is further configured to exit the active yawing flow according to a wake control exit command sent by the station sector control management subsystem, and if the active yawing flow exits, perform the following operations:
and acquiring the wind condition borne by the current wind turbine generator, and forwarding the wind condition borne by the current wind turbine generator to an original controller of the current wind turbine generator.
7. The system of claim 1, wherein the site sector control management subsystem is configured to:
acquiring wind condition information of corresponding wind turbine generator positions sent by each externally-mounted controller;
determining whether the wind direction of the corresponding wind turbine generator is in a stable state or not according to the wind condition information, and determining the current average wind direction DnAnd whether the wake flow control command is located in a sector management wind direction setting area omega or not and sending the wake flow control command to the plug-in controller.
8. The field level sector control management subsystem of claim 7, wherein t is a function of time period t1Average value D of downwind direction1，D2，...，DnCalculating a difference value Delta D between the average values and a reference difference value DrefIn the case of Δ D < DrefThen, it indicates the time period t1The wind direction of the unit is in a stable state;
wherein Δ D ═ Dn-Dn-1|+…+|D2-D1|。
9. The field level sector control management subsystem of claim 8, wherein prior to the sector control management subsystem sending a wake control instruction to the onhook controller, the method further comprises:
determining the current average wind direction D in a steady statenWhether the wind direction is located in a sector management wind direction setting area omega or not is judged, if yes, a wake flow control starting instruction is sent to the external-hanging controller;
and the sector management wind direction setting area omega is a wind direction area of the unit affected by wake flow.
10. The system of claim 9, wherein the site sector control management subsystem is further configured to average D at the current wind directionnAnd sending a wake control quit instruction to the external controller under the condition that the wake control quit instruction does not fall into the range of the sector management wind direction setting area omega.
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