Control Method, Device and Wind Farm System for Regional Interconnection of Wind Turbine Generators

Abstract

The present disclosure provides a control method, apparatus and wind farm system for regional interconnection of wind turbine generators. The control method includes: based on the positional relationship of two or more wind turbine generators within a predetermined area in a wind farm, presetting one of the two or more wind turbine generators as a message forwarder; and performing sensor data exchange between the two or more wind turbine generators through the message forwarder for the control of the wind turbine generators. By establishing regional interconnection, the communication time between wind turbine generators is shortened, so that data between adjacent wind turbine generators can be exchanged for use in the yaw or pitch control of the wind turbine.

Description

Technical Field

[0001] The following description relates to the field of wind power generation, and specifically relates to a control method, device and wind farm system for regional interconnection of wind turbines. Background Art

[0002] With the gradual expansion of the scale of wind turbines and the increasingly perfect protection of the safety of the turbines, improving the operating performance of wind turbines (i.e., the power generation and availability of wind turbines) has received more and more attention.

[0003] The main control system is the main body of the control system of a wind turbine, and is used to implement important controls such as automatic start-up, automatic wind alignment, automatic speed regulation, automatic grid connection, automatic grid disconnection, automatic cable uncoiling, and automatic recording and monitoring, as well as fault protection functions. The three main external interfaces of the main control system are the monitoring system interface, the pitch control system interface, and the frequency conversion system (frequency converter) interface. The monitoring system interface completes the exchange of real-time data and statistical data of the wind turbine. The pitch control system interface controls the blades to achieve maximum wind energy capture and constant speed operation. The frequency conversion system (frequency converter) interface realizes the automatic adjustment of active power and reactive power.

[0004] The fault protection function of a wind turbine is crucial for the safe operation of the wind turbine. The fault protection function is divided into two types: hardware protection function and software protection function. At present, the software fault protection of wind turbines is mostly single-fault protection, that is, when a certain fault occurs in the wind turbine, the main control system immediately controls the wind turbine to retract the blades and stop, resulting in a certain downtime and power generation loss.

[0005] The current general research method for the active yaw of wind turbines is to predict the wind speed value and wind direction value, and install a GPS global positioning instrument to detect the distance between wind turbines; its implementation method is difficult to achieve accurate wind condition prediction. At present, there are mainly the following three methods for realizing wind speed prediction: a) Using weather forecasts for prediction. This method has a high degree of blindness, and the predicted wind speed value and wind direction value are inaccurate; b) Prediction of wind direction values based on big data. This method has a high degree of blindness, and big data can only predict probabilities and cannot reflect the real wind speed value and wind direction value. Moreover, big data often requires historical data of long-term operation, and the data volume and value extraction require a certain amount of space, time and technical foundation. At the same time, big data contains a large amount of historical data; c) Using high-precision anemometers such as laser anemometers, but the equipment is expensive and the detection distance is limited, and short-term wind condition prediction can be carried out, and long-distance and longer-term wind condition prediction cannot be carried out.

[0006] In addition, from the perspective of the technical route of data analysis, since there are a large number of wind measurement towers in the wind farm, if data communication is to be carried out with all the wind measurement towers, it will cause an extension of the communication cycle. If the communication cycle is too long, complex algorithm operations need to be performed on the data time values. Summary of the Invention

[0007] The present invention content is provided to introduce selected concepts in a simplified form and further describe these concepts in the following detailed implementation. The present invention content is not intended to identify the key features or essential features of the claimed subject matter, nor is it intended to assist in determining the scope of the claimed subject matter.

[0008] The present invention proposes a control method for regional interconnection of wind turbines, establishing communication connections and data interactions for adjacent or regional wind turbines in a wind farm. When the wind turbines are operating, the wind turbines monitor the wind conditions of their own turbines and the wind conditions of surrounding wind turbines, and perform redundant judgment of operating conditions. By establishing regional interconnection, the communication time between wind turbines can reach the 100 ms level, which is shorter than the SCADA (Supervisory Control and Data Acquisition) communication cycle (generally 5 - 7 seconds). With the shortening of the communication time, the data of adjacent wind turbines can be exchanged and applied to the yaw or pitch control of the wind turbines.

[0009] In one general aspect, a control method for regional interconnection of wind turbines is provided. The control method includes: based on the positional relationship of two or more wind turbines in a predetermined area of a wind farm, presetting one of the two or more wind turbines as a message forwarder; and performing sensor data exchange between the two or more wind turbines through the message forwarder for the control of the wind turbines.

[0010] In response to a sensor of one of the two or more wind turbines failing, it is possible to determine whether the sensor data of adjacent wind turbines is valid based on the positional relationship; and in response to the sensor data of the adjacent wind turbines being valid, perform sensor data exchange between the wind turbine with the fault and the adjacent wind turbines through the message forwarder to control the one wind turbine to continue operating.

[0011] The sensor data may include at least one of ambient temperature, nacelle temperature, wind speed value, wind direction value, yaw count, and yaw speed feedback.

[0012] By collecting the sensor data exchanged by the message forwarder, it is possible to process and obtain an optimized measurement of environmental parameters based on the positional relationship.

[0013] In response to the difference between the ratio of the wind speed sensed value of a wind turbine and the wind speed sensed values of the wind turbines upwind and the wind speed sensed values of the wind turbines perpendicular to the wind direction exceeding a predetermined threshold, sensor data exchange can be performed between the wind turbines perpendicular to the wind direction through the message forwarder for the control of the wind turbines.

[0014] The wind turbine set as the message forwarder can be at the position with the shortest total distance to other wind turbines within the predetermined area.

[0015] In another general aspect, a control device for regional interconnection of wind turbines, the control device includes: a controller configured to preset one of the two or more wind turbines as a message forwarder based on the positional relationship of the two or more wind turbines, and perform sensor data exchange between the two or more wind turbines through the message forwarder for the control of the wind turbines.

[0016] When a sensor of one of the two or more wind turbines fails, the controller can determine whether the sensor data of the adjacent wind turbines is valid based on the positional relationship; and in response to the sensor data of the adjacent wind turbines being valid, perform sensor data exchange between the wind turbine with the failure and the adjacent wind turbines through the message forwarder to control the one wind turbine to continue operating.

[0017] The controller can collect the sensor data exchanged by the message forwarder and process it based on the positional relationship to obtain an optimized measurement of the environmental parameters.

[0018] When the difference between the ratio of the wind speed sensed value of the wind speed sensor of a wind turbine and the wind speed sensed values of the wind turbines upwind and the wind speed sensed values of the wind turbines perpendicular to the wind direction exceeds a predetermined threshold, the controller can perform sensor data exchange between the wind turbines perpendicular to the wind direction through the message forwarder for the control of the wind turbines.

[0019] In another general aspect, a wind farm system is provided, the wind farm system includes: a plurality of wind turbines arranged in a wind farm, the plurality of wind turbines are divided into a plurality of sub - regions according to the positional relationship, and each sub - region includes at least two wind turbines; and the control device for regional interconnection of wind turbines as described above.

[0020] In another general aspect, there is provided a computer-readable storage medium storing a computer program which, when executed by a processor, implements the above-described control method for regional interconnection of wind turbine generators.

[0021] In another general aspect, there is provided a computer device, which includes: a processor; a memory storing a computer program which, when executed by the processor, implements the above-described control method for regional interconnection of wind turbine generators. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram showing the interconnection of two machines according to an embodiment of the present invention;

[0023] Figure 2 Schematic diagram showing the regional interconnection according to an embodiment of the present invention;

[0024] Figure 3 Schematic diagram showing the comparison between the message forwarder mode and the normal mode according to an embodiment of the present invention;

[0025] Figure 4 Schematic diagram showing the control method for regional interconnection of wind turbine generators according to an embodiment of the present invention;

[0026] Figure 5 Schematic diagram showing the underlying network and the upper-layer algorithm according to an embodiment of the present invention;

[0027] Figure 6 Schematic diagram showing the wake of a wind turbine generator; and

[0028] Figure 7 Schematic diagram showing the wind turbine generator affected by the wake. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] The fault protection function of a wind turbine generator is divided into two types: hardware protection function and software protection function. The hardware protection function mainly refers to the safety chain protection function. The operation of the safety chain protection system is independent of the programmable controller of the control system. Even if the programmable controller of the control system fails and the software protection function fails, it will not affect the normal operation of the safety protection system. The safety chain protection includes impeller overspeed protection, generator overspeed protection, cable twisting protection, vibration protection, programmable controller watchdog protection, nacelle emergency stop protection, and converter cabinet emergency stop protection.

[0030] The software protection function depends on the normal operation of the programmable controller. The issuance of protection instructions is implemented by the control system software. The control system monitors the operating status of the unit in real time. When one or more operating parameters exceed the set values, or the operating status of the unit exceeds the safe operating conditions, the unit will shut down. In the fault protection function of the main control system of a wind turbine generator set, it mainly includes six parts of fault factors: (1) faults of the unit itself; (2) grid faults; (3) pitch system faults; (4) converter system faults; (5) external sensor faults; (6) auxiliary actuator faults. Among them, for the fault factors of items (1), (2), (3), and (4), in principle, shielding or ignoring is not allowed to protect the safety of the unit.

[0031] However, for the fault factors of items (5) and (6), as they are not faults of the unit itself or grid faults, the impact on the safety of the unit is relatively small. At this time, if the shutdown operation is also executed, it will cause unnecessary power generation losses to a certain extent. For example, when the anemometer fails, the unit shuts down. It takes at least 2 to 4 hours for maintenance personnel to replace the anemometer. If there is no anemometer spare part currently, this wind turbine generator set will shut down for 1 to 2 weeks, thus causing more downtime.

[0032] Preferred Embodiment of the Present Invention

[0033] The regional interconnection according to the embodiments of the present invention includes: a dual-machine interconnection function and a regional interconnection function. The dual-machine interconnection involves the status feedback and execution action conditions of a single machine itself, and the status feedback and execution action conditions of other wind turbine generator sets. The regional interconnection function involves the status feedback and execution action conditions of wind turbine generator sets within a predetermined area, and can realize functions such as starting the machine in light wind, yawing in the main wind direction, fault tolerance of anemometer and wind vane, and pre-judgment of overspeed protection.

[0034] Figure 1 The schematic diagram showing the dual-machine interconnection according to the embodiments of the present invention is referred to Figure 1 , a communication connection is established between two wind turbine generator sets, and the data exchanged includes but is not limited to the operating wind speed, wind direction, yaw angle, yaw count, ambient temperature, nacelle temperature of the wind turbine generator set, as well as various status feedback and action conditions.

[0035] Figure 2 The schematic diagram showing the regional interconnection according to the embodiments of the present invention is referred to Figure 2, according to an embodiment of the present invention, when a sensor such as an anemometer of a wind turbine generator fails, a central monitoring system, for example, a controller (not shown) can, based on the positional relationship of two or more wind turbine generators in a predetermined area of a wind farm, preset one of the wind turbine generators as a message repeater, and perform sensor data exchange between two or more wind turbine generators through the message repeater. The wind speed data measured by any wind turbine generator around this wind turbine generator can be called to provide a reference for this wind turbine generator, enabling this wind turbine generator to operate safely with a fault. For example, in response to a sensor of one of two or more wind turbine generators in a predetermined area failing, the controller can determine whether the sensor data of adjacent wind turbine generators is valid based on the positional relationship; and in response to the sensor data of adjacent wind turbine generators being valid, perform sensor data exchange between the wind turbine generator with the fault and the adjacent wind turbine generator through the message repeater to control one wind turbine generator to continue operating. The predetermined area in the wind farm can be freely divided according to the geographical location and characteristics of the wind turbine generators, and the degree of adjacency between the wind turbine generators can be preset so that the data connection between the wind turbine generators within this distance range can be effectively utilized.

[0036] Figure 2 The wind turbine generator 210 located in the predetermined area 200 is defined as a message repeater. The message repeater receives the data transmitted from other wind turbine generators and sends the data required by other wind turbine generators. The wind turbine generator set as the message repeater can be in the position with the shortest total distance from other wind turbine generators. All other wind turbine generators obtain data from the message repeater and transmit their own data to the message repeater. If the message repeater malfunctions, a standby message repeater can be used, and the standby order of the wind turbine generators in the predetermined area can be preset.

[0037] According to an embodiment of the present invention, the wind turbine generators in a predetermined area can establish communication only with the message repeater, and the communication between other wind turbine generators can establish relay communication through the message repeater. The predetermined area can be automatically set and the message repeater can be matched according to the geographical location and characteristics of the wind turbine generators.

[0038] According to an embodiment of the present invention, various operating data of a wind turbine generator set communicate with each other through a message forwarder, which can shorten the data communication time between wind turbine generator sets, and can improve the immediacy of control in terms of control. It is possible to judge the feasibility of continuous operation of a wind turbine generator set that has a non-unit fault, ensure the safety of the unit, reduce the downtime of the unit, reduce the loss of power generation, and improve the overall efficiency of the wind farm. At the same time, especially in areas with many phenomena such as wind shear in mountainous areas, abnormal changes in wind speed and wind direction can be identified in advance by detecting and comparing the wind condition data of wind turbine generator sets in the area.

[0039] In the case of not adopting the message forwarder mode, since the number of communication channels will increase significantly as the number of wind turbine generator sets increases, therefore, compared with the ordinary mode without a message forwarder, the message forwarder mode according to the embodiment of the present invention can reduce the communication channels.

[0040] Figure 3 A comparison schematic diagram of the message forwarder mode and the ordinary mode according to an embodiment of the present invention is shown. Refer to Figure 3 , when the number of wind turbine generator sets in a predetermined area is n, the message forwarder mode according to the embodiment of the present invention requires n - 1 data channels. However, the ordinary mode requires n(n - 1) / 2 data channels. Taking 33 wind turbine generator sets as an example, using the message forwarder mode, the number of communication channels is 32. While in the ordinary mode without a message forwarder, the number of communication channels can reach 528.

[0041] The control difference between the message forwarder mode and the ordinary mode is that for data with relatively frequent changes such as wind speed and wind direction, the shorter the communication cycle, the higher the immediacy of control. When a sensor of a certain wind turbine generator set is abnormal, the data collected by another wind turbine generator set can be directly used for replacement. Since the specific topological structure has been determined in advance according to the positions of the wind turbine generator sets, the predetermined message forwarder can directly determine the target sensor data for replacement without the need for the central monitoring system to sort and match the numbers of the wind turbine generator sets.

[0042] The interactive data of the present invention and the applicable control strategy reference table 1. In the same wind farm, the operation data of adjacent wind turbines (such as wind speed, wind direction, ambient temperature, etc.) are relatively close. However, if relayed by the existing SCADA central monitoring system, it takes 5 to 7 seconds for the data to be transmitted from one wind turbine to the SCADA, and another 5 to 7 seconds for the data to be transmitted from the SCADA to another wind turbine. The delay and lag of data transmission cannot be directly used for the control of wind turbines. In addition, corresponding data matching and timing matching are required, and corresponding data processing and algorithm applications are carried out in the SCADA. According to the embodiments of the present invention, the data of the wind turbines in the region can be directly referenced without the need to perform relevant data processing and algorithm development in the SCADA, which can shorten the development cycle of functions. For example, when it is determined that the sensor data is valid based on the positional relationship and data type, the ambient temperature data, 3-second average wind speed, and wind direction angle, etc. can be exchanged between the faulty wind turbine and the adjacent wind turbines through the message forwarder.

[0043] Table 1

[0044]

[0045] Figure 4 A schematic diagram showing a control method for regional interconnection of wind turbines according to an embodiment of the present invention. Refer to Figure 4 , in step 410, based on the positional relationship of two or more wind turbines in a predetermined area in the wind farm, one of the two or more wind turbines is preset as a message forwarder. In step 420, sensor data is exchanged between the two or more wind turbines through the message forwarder for the control of the wind turbines.

[0046] The communication methods of two or more wind turbines in the predetermined area are as Figure 5 shown, Figure 5 A schematic diagram showing the underlying network and upper-layer algorithm for regional interconnection of wind turbines according to an embodiment of the present invention. In Figure 5 , the IP address of each wind turbine, the state machine of each wind turbine, the fault number, the command for each wind turbine to execute its own decision, the priority, the progress of the action, and the communication methods involved in the state protocol structure mode include but are not limited to Prifibus-DP, CanOpen, Internet, and EtherCAT, etc. The variable configuration table of the underlying network is a set of variable tables required by the algorithm. Each algorithm has a private configuration table that records the variables required by the algorithm, and the algorithm configuration table will enable the enable flag of the underlying network variable configuration table. Thus, the variables required in the network are selected.

[0047] According to an embodiment of the present invention, when the ambient temperature of a wind turbine generator is high, low, or the measured value of the ambient temperature is missing, the message forwarder compares the ambient temperature information of adjacent wind turbine generators in a predetermined area to determine whether the wind turbine generator can continue to generate electricity. The adjacency degree of each wind turbine generator can be preset in a priority order based on the positional relationship. If the ambient temperature measured by the adjacent wind turbine generators in the area is within the normal range, the message converter sends the ambient temperature data measured by the adjacent wind turbine generators to the controller of the wind turbine generator. The controller receives the ambient temperature data and continues to control the faulty wind turbine generator to generate electricity. If the ambient temperature measured by the adjacent wind turbine generators in the area is too high or too low and reaches the alarm threshold range, the wind turbine generator performs the shutdown operation of the faulty wind turbine generator according to the judgment of its own controller.

[0048] According to an embodiment of the present invention, when the nacelle temperature of a wind turbine generator is low, high, or the nacelle temperature is missing, the message forwarder can compare the nacelle temperature information of adjacent wind turbine generators in the area to determine whether the wind turbine generator can continue to generate electricity. The adjacency degree of the wind turbine generators can be preset in a priority order based on the positional relationship. If the nacelle temperature measured by the adjacent wind turbine generators in the area is within the normal range, the message forwarder sends the nacelle temperature data measured by the adjacent wind turbine generators to the controller of the wind turbine generator. The controller can receive the nacelle temperature data and control the wind turbine generator with a sensor fault to continue generating electricity. If the nacelle temperature measured by the adjacent wind turbine generators in the area is close to the alarm threshold range of too high or too low temperature, the wind turbine generator performs the shutdown operation of the faulty wind turbine generator according to the judgment of its own controller. Optionally, since the measured values of the nacelle temperature and the ambient temperature generally maintain a fixed difference, the ambient temperature information can also be used to eliminate the fixed difference to determine the nacelle temperature information.

[0049] According to an embodiment of the present invention, when a wind speed sensor of a wind turbine generator fails, the message forwarder compares the wind speed information of adjacent wind turbine generators in the area. If the wind speed information measured by the adjacent wind turbine generators in the area is within the normal range, the message forwarder sends the wind speed information to the faulty wind turbine generator. The wind turbine generator with a failed wind speed sensor continues to generate electricity or performs shutdown control based on the wind speed data sent by the message forwarder. If the wind speed value measured by the adjacent wind turbine generators in the area is too high or too low and exceeds the fault alarm value, the wind turbine generator performs the shutdown operation of the faulty wind turbine generator according to the judgment of its own controller.

[0050] According to an embodiment of the present invention, when a wind vane fault occurs in a wind turbine generator set, the message repeater compares the absolute yaw position information of adjacent wind turbine generator sets in the area. If the absolute yaw position information measured by the adjacent wind turbine generator sets in the area is within the normal range, the message repeater sends the absolute yaw position information measured by the adjacent wind turbine generator sets to the controller of this wind turbine generator set. The controller can receive this data and control the wind turbine generator set with the wind vane fault to continue generating electricity according to the absolute yaw position information sent by the message repeater, avoiding a fault shutdown. The absolute yaw position information refers to the angle value by which the nacelle of the wind turbine generator set deviates from a predetermined 0-degree direction (such as the due north direction). If the absolute yaw position information measured by the adjacent wind turbine generator sets in the area exceeds the fault alarm value, this wind turbine generator set performs a shutdown operation of the faulty wind turbine generator set according to the judgment of its own controller.

[0051] According to an embodiment of the present invention, when a yaw count sensor fault occurs in a wind turbine generator set, the message repeater compares the yaw count information of adjacent wind turbine generator sets in the area. If the yaw count information measured by the adjacent wind turbine generator sets in the area is within the normal range, the message repeater sends the yaw count information measured by the adjacent wind turbine generator sets to the controller of this wind turbine generator set. The controller receives this yaw count information and controls the faulty generator set to operate normally. Here, the yaw count information can be the accumulated yaw angle value of the wind turbine generator set.

[0052] Specifically, if the yaw count information measured by the adjacent wind turbine generator sets in the area is within the normal range, the wind turbine generator set with the sensor fault continues to generate electricity according to the current yaw count information of the adjacent wind turbine generator obtained through the message repeater, and can estimate the accumulated time that the faulty wind turbine generator set can continue to yaw according to this yaw count information to monitor the status of the cable twisting switch in real time and prevent cable twisting. For example, the yaw angle of the current faulty wind turbine generator set is 400 degrees (i.e., the yaw count information obtained from the message repeater), and the yaw cable untwisting angle is 660 degrees (i.e., the maximum angle value allowed for the yaw of the wind turbine generator set. Cable twisting occurs after exceeding this value). If the current yaw speed is 3 degrees per second, the accumulated time that the current faulty wind turbine generator set can continue to yaw can be calculated as (660 - 400) / 3 = 86.6 seconds, that is, the time for the faulty wind turbine generator set to rotate from the current yaw angle value of 400 degrees to the maximum angle of 660 degrees is at most 86.6 seconds. Cable twisting will occur after exceeding 86.6 seconds. Therefore, the controller will control the unit to shut down at this time and notify the operation and maintenance personnel to perform operation and maintenance on the unit.

[0053] However, the present invention is not limited thereto. If the yaw count information measured by adjacent wind turbines in the area is within the normal range, the wind turbine with a sensor failure can obtain the yaw count information of adjacent wind turbines in real time through a message repeater, and directly determine whether the faulty wind turbine has reached the maximum angle value allowed for yaw according to the real-time obtained yaw count information, thereby preventing cable torsion. For example, when adjacent wind turbines are operating normally, their yaw count information is updated in real time as follows: 400 degrees, 420 degrees, 430 degrees... and so on. Then, the faulty wind turbine can obtain the updated data of adjacent wind turbines in real time through the message repeater, that is, 400 degrees, 420 degrees, 430 degrees... and so on, to perform real-time yaw control on the faulty wind turbine. When the obtained yaw angle value reaches 660 degrees (i.e., the maximum angle value allowed for yaw of the wind turbine, and cable torsion will occur after exceeding this value), the controller controls the unit to stop and notifies the operation and maintenance personnel to perform operation and maintenance on the unit.

[0054] According to an embodiment of the present invention, when a yaw speed feedback loss fault (yaw motor feedback signal loss) occurs in a wind turbine, the yaw speed value of an adjacent wind turbine obtained by the wind turbine through a message repeater. If the yaw speed feedback information measured by adjacent wind turbines in the area is within the normal range, the message repeater sends the measured yaw speed feedback information of the adjacent wind turbines to the controller of the wind turbine, and the controller controls the yaw speed and continues to generate electricity. For example, if the normal yaw speed of the unit is 3 degrees per second and the actual yaw speed is less than the threshold value (2.5 degrees per second), it is considered that there is a yaw speed feedback fault. At this time, it can be judged whether the yaw motor is operating normally according to the internal power generation efficiency or the working current of the yaw motor of this wind turbine. If the yaw motor is working normally, the wind turbine can continue to operate without stopping according to the yaw speed feedback of the adjacent wind turbine obtained through the message repeater. If the yaw motor is not working properly, the wind turbine performs a shutdown operation of the faulty wind turbine according to the judgment of its own controller.

[0055] The data of adjacent wind turbines in the above embodiment can be judged for validity. Preferably, the sensor data of a wind turbine closest in position can be selected according to a preset order. When the data of the closest wind turbine is valid, the data can be transmitted to the wind turbine with a sensor failure through a message repeater to control its continued operation. When the data of the closest wind turbine fails, it can be selected downward according to the position order or the faulty wind turbine can be notified to perform a shutdown operation. However, the present invention is not limited thereto, and the data of multiple wind turbines according to a preset order can also be referred to for comprehensive judgment as long as the technical effects of this solution can be achieved.

[0056] An embodiment of the present invention further provides a control device for regional interconnection of wind turbine generators. The controller included in the control device is configured to: based on the positional relationship of two or more wind turbine generators within a predetermined area in a wind farm, preset one of the two or more wind turbine generators as a message forwarder; perform sensor data exchange between the two or more wind turbine generators through the message forwarder for the control of the wind turbine generators. The controller can also, in response to a sensor of one of the two or more wind turbine generators failing, determine whether the sensor data of adjacent wind turbine generators is valid based on the positional relationship; and in response to the sensor data of adjacent wind turbine generators being valid, perform sensor data exchange between the faulty wind turbine generator and the adjacent wind turbine generator through the message forwarder to control one wind turbine generator to continue operating. The controller can also collect the sensor data exchanged by the message forwarder and process it based on the positional relationship to obtain an optimized measurement of environmental parameters. The controller can also, in response to the difference between the wind speed sensing value of the wind speed sensor of a wind turbine generator and the ratios of the wind speed sensing values of the wind turbine generators upwind and perpendicular to the wind direction exceeding a predetermined threshold, perform sensor data exchange between the wind turbine generators perpendicular to the wind direction through the message forwarder for the control of the wind turbine generators.

[0057] Figure 6 Schematic diagram showing the wake of a wind turbine generator. Figure 7 Schematic diagram showing a wind turbine generator affected by the wake.

[0058] According to an embodiment of the present invention, the message forwarder collects the exchangeable sensor data of the wind turbine generators within a predetermined area and obtains an optimized measurement of environmental parameters (such as wind speed, temperature, etc.) based on the positional relationship. The combined use of the sensor data of the wind turbine generators within the predetermined area can model the data based on the positional relationship to obtain a big data model based on the position field, so as to eliminate the abnormal mutation or deviation error range of the measurement values caused by the environmental parameter measurement limited to a specific position.

[0059] For example, based on the coordinate position and relative position relationship of the wind turbine generator sets, an air fluid field model of the wind condition environment can be established. By processing the data model (such as mean calculation and variance calculation, etc.), the wind condition measurement values can be made more accurate. For example, the adverse impact on the fan control caused by the instantaneous change of the wind speed or wind direction exceeding the control limit in a very small area of the wind field can be eliminated, and the control instructions can be optimized. In response to the difference between the ratio of the wind speed sensing value of the wind speed sensor of the wind turbine generator set and the wind speed sensing value of the wind turbine generator set in the upwind direction and the wind speed sensing value of the wind turbine generator set perpendicular to the wind direction exceeding a predetermined threshold, sensor data exchange is performed between the wind turbine generator sets perpendicular to the wind direction through a message forwarder for the control of the wind turbine generator set.

[0060] Referring to Figure 6 , when the installation position of the anemometer is in the near wake area, the measured value of the wind speed V inside the air duct is affected by the wake, resulting in inaccurate measured values. Referring to Figure 7 , the message forwarder can collect and monitor the wind direction of each wind turbine generator set. As Figure 7As shown in the figure, since there is a wind turbine 502 on the upwind side of the wind turbine 503, and there is no wind turbine on the upwind side of the wind turbine 504. Therefore, the wind turbine 503 will be affected by the wake of the wind turbine 502, while the wind turbine 504 is not affected by the wake. Considering that the connection line between the wind turbine 503 and the wind turbine 504 is nearly perpendicular to the wind direction, the theoretical wind speed values measured by the wind turbine 503 and the wind turbine 504 should be quite similar. For example, the wind speed value measured by the wind turbine 502 is V502, the wind speed value measured by the wind turbine 503 is V503, and the wind speed value measured by the wind turbine 504 is V504. Due to the influence of the wake, the measured value V503 decreases to a certain extent compared with V502, and the ratio of V503 to V502 is a = V503 / V502; while V504 is not affected by the wake of the front wind turbine, so the ratio of V504 to V502 is: b = V504 / V502. When b > a, it can be determined that the data acquisition of V503 is affected by the wake. Since the wind speed value measured by V504 is closer to the true wind speed value, the message repeater monitors the wind speed values of the wind turbine 504 and the wind turbine 503, and judges the value of b / a. When the value is stable, for example, it can be calculated whether the change rate of the value of b / a at different times remains consistent (the values are the same or within the set value range), that is, according to the value of b / a at time T1 and the value of b / a at time T2, calculate the change rate, and so on, to compare whether the change rates at different times remain consistent. If they remain consistent, the wind turbine 503 can use its own wind speed value for pitch control and operating state detection; when the value of b / a fluctuates abnormally (that is, the change rates of the value of b / a at different times are different, that is, the values are not the same or not within the set value range), it can be considered that the wind speed has mutated. At this time, the wind turbine 503 calls the data of the wind turbine 504 for pitch control. It should be noted that the method of judging the value of b / a is not limited to this.

[0061] According to an exemplary embodiment of the present invention, there is also provided a wind farm system, the wind farm system including: a plurality of wind turbines provided in the wind farm, the plurality of wind turbines being divided into a plurality of sub-regions according to the positional relationship, each sub-region including at least two wind turbines; and a control device for interconnection of the wind turbine regions as described above.

[0062] According to an exemplary embodiment of the present invention, there is also provided a computer-readable storage medium storing a computer program. The computer-readable storage medium stores a computer program that, when executed by a processor, causes the processor to execute the control method for regional interconnection of wind turbine generators according to the present invention. The computer-readable storage medium is any data storage device capable of storing data read out by a computer system. Examples of the computer-readable recording medium include: read-only memory, random access memory, compact disc read-only memory, magnetic tape, floppy disk, optical data storage device, and carrier waves (such as data transmission via the Internet through wired or wireless transmission paths).

[0063] According to an exemplary embodiment of the present invention, there is also provided a computer device. The computer device includes a processor and a memory. The memory is used to store a computer program. The computer program, when executed by the processor, causes the processor to execute the computer program of the control method for regional interconnection of wind turbine generators according to the present invention.

[0064] According to an exemplary embodiment of the present invention, by establishing regional interconnection, the communication time between wind turbine generators is shortened, so that data between adjacent wind turbine generators can be exchanged and applied to the yaw or pitch control of the wind turbine.

[0065] The specific embodiments of the present invention have been described in detail above. Although some embodiments have been shown and described, those skilled in the art should understand that different embodiments can be implemented in combination, and these embodiments can be modified and varied without departing from the principles and spirit of the present invention defined by the claims and their equivalents. These modifications and variations should also be within the protection scope of the claims of the present invention.

Claims

1. A control method for regional interconnection of a wind power generation unit, characterized in that, The control method includes: Based on the positional relationship of two or more wind turbines within a predetermined area in a wind farm, preset one of the two or more wind turbines as a message repeater; Perform sensor data exchange between the two or more wind turbines through the message repeater for the control of the wind turbines; When a yaw speed feedback loss fault occurs, based on the yaw motor working current, determine that the yaw motor is working normally and the yaw speed feedback information measured by adjacent wind turbines in the area is within the normal range, and continue to operate without shutting down using the yaw speed feedback of the adjacent wind turbines obtained through the message repeater.

2. The control method according to claim 1, wherein When the nacelle temperature sensor fails, the message repeater compares the nacelle temperature information of adjacent wind turbines in the area. Based on the nacelle temperature measured by adjacent wind turbines in the area being within the normal range, determine the nacelle temperature information using the nacelle temperature data of the adjacent wind turbines obtained through the message repeater or using the ambient temperature information and a fixed difference.

3. The control method according to claim 1, wherein, When the anemometer fails, based on the wind speed information measured by adjacent wind turbines in the area being within the normal range, obtain the wind speed information of the adjacent wind turbines through the message repeater; When the wind vane fails, based on the yaw absolute position information measured by adjacent wind turbines in the area being within the normal range, obtain the yaw absolute position information of the adjacent wind turbines through the message repeater.

4. The control method according to claim 1, characterized in that, When the yaw count sensor fails, based on the yaw count information measured by adjacent wind turbines in the area being within the normal range, obtain the yaw count information of the adjacent wind turbines through the message repeater, and estimate the cumulative time for the faulty wind turbine to continue yawing based on this yaw count information to prevent cable twisting.

5. The control method according to claim 1, wherein In response to the difference between the wind speed sensed value of a wind turbine and the ratios of the wind speed sensed values of the wind turbines upwind and perpendicular to the wind direction exceeding a predetermined threshold, perform sensor data exchange between the wind turbines perpendicular to the wind direction through the message repeater for the control of the wind turbines.

6. The control method according to claim 1, wherein The wind turbine set as the message repeater is at the position with the shortest total distance to other wind turbines within the predetermined area.

7. A control device for regional interconnection of a wind power generation unit, characterized in that, The control device includes: A controller configured to: Based on the positional relationship of two or more wind turbines, preset one of the two or more wind turbines as a message repeater and perform sensor data exchange between the two or more wind turbines through the message repeater for the control of the wind turbines; When a yaw speed feedback loss fault occurs, based on the yaw motor working current, determine that the yaw motor is working normally and the yaw speed feedback information measured by adjacent wind turbines in the area is within the normal range, and continue to operate without shutting down using the yaw speed feedback of the adjacent wind turbines obtained through the message repeater.

8. The control device according to claim 7, characterized in that, When the nacelle temperature sensor fails, the controller compares the nacelle temperature information of adjacent wind turbines in the area through the message repeater. Based on the fact that the nacelle temperatures measured by adjacent wind turbines in the area are within the normal range, the controller determines the nacelle temperature information by using the nacelle temperature data of adjacent wind turbines obtained through the message repeater or by using the ambient temperature information and a fixed difference.

9. The control device according to claim 7, characterized in that, When the anemometer fails, the controller obtains the wind speed information of adjacent wind turbines through the message repeater based on the fact that the wind speed information measured by adjacent wind turbines in the area is within the normal range. When the wind vane fails, the controller obtains the absolute yaw position information of adjacent wind turbines through the message repeater based on the fact that the absolute yaw position information measured by adjacent wind turbines in the area is within the normal range.

10. The control device according to claim 7, characterized in that, When the yaw count sensor fails, the controller obtains the yaw count information of adjacent wind turbines through the message repeater based on the fact that the yaw count information measured by adjacent wind turbines in the area is within the normal range, and estimates the cumulative time for the faulty wind turbine to continue yawing according to the yaw count information to prevent cable twisting.

11. The control device according to claim 7, characterized in that, In response to the difference between the wind speed sensing value of the wind speed sensor of the wind turbine and the ratios of the wind speed sensing values of the wind turbines on the upwind side and the wind turbines in the direction perpendicular to the wind direction exceeding a predetermined threshold, the controller exchanges sensor data between the wind turbines in the direction perpendicular to the wind direction through the message repeater for the control of the wind turbine.

12. A wind farm system, characterized in that, The wind farm system includes: A plurality of wind turbines arranged in the wind farm, and the plurality of wind turbines are divided into a plurality of sub-areas according to the positional relationship, and each sub-area includes at least two wind turbines; The control device for interconnection of wind turbine areas as described in any one of claims 7-11.

13. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the control method for interconnection of wind turbine areas as described in any one of claims 1 to 6.

14. A computer device, characterized in that, The computer device includes: A processor; A memory storing a computer program, and when the computer program is executed by the processor, it implements the control method for interconnection of wind turbine areas as described in any one of claims 1 to 6.

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