A method and system for adjusting the speed of a wind turbine generator

Abstract

The present application provides a method and system for regulating the speed of a wind turbine generator. Load monitoring points are set at multiple key points of the wind turbine generator. The wind turbine generator speed reference value is corrected in real time by analyzing the comprehensive load indicators of the current load and the maximum load of the multiple load monitoring points of the unit. Under the premise of ensuring that the wind energy utilization coefficient of the wind turbine operation remains unchanged for most of the time, the dangerous load value signal of the key point is sensitively responded to, thereby reducing the risk of load exceeding the limit during the operation of the wind turbine and extending the operating life of the wind turbine.

Description

Technical Field

[0001] The present application relates to the technical field of wind power generation, and in particular to a method and system for regulating the speed of a generator of a wind turbine set. Background Art

[0002] When the wind turbine generator (generally referring to the direct drive unit in the present invention, the generator is a permanent magnet generator) is running, the speed of the generator can be closed-loop regulated by adjusting the switch control signal to the machine-side converter. The specific operation is that the main control system gives the machine-side converter the corresponding generator speed signal. The speed adjustment often requires a period of adjustment time to reach a steady state. In addition, the wind turbine will place load sensors at the blades, towers, transmission shaft systems and other positions of the unit, which can detect the load value of the point in real time and feed it back to the main control system.

[0003] The generation of the speed reference value given to the generator-side converter by the existing generator speed control system has nothing to do with the load value of the wind turbine set, but depends on the optimal wind energy utilization coefficient that the current wind turbine set can achieve. At the current wind speed, a speed reference value corresponding to the optimal wind energy utilization coefficient is generated. At the same time, under the existing technical scheme, if the load value or temperature value detected by the current wind turbine set is higher than the limit value, the generator is shut down, that is, the speed reference value = 0. Although this technical scheme can ensure that the wind turbine set outputs power at the maximum wind energy utilization coefficient most of the time, it only adjusts the speed when the load is determined to be over-limit, and cannot adjust the operating status of the unit according to the real-time torque value of the current unit. It is easy to increase the unsafe factor of the unit's load over-limit and reduce the service life of the unit. Summary of the invention

[0004] The embodiment of the present invention provides a method and system for adjusting the speed of a wind turbine generator, which performs real-time correction on a reference value of the speed of the wind turbine generator by analyzing comprehensive indicators of current loads and maximum loads of multiple main load monitoring points of the unit.

[0005] In order to solve the above technical problems, this application provides the following technical solutions:

[0006] In a first aspect, the present application provides a method for adjusting the speed of a wind turbine generator, wherein the wind turbine generator includes a plurality of load monitoring points, and the method for adjusting the speed of a wind turbine generator includes:

[0007] Obtaining a load index of the generator according to the current load and the maximum load of each load monitoring point;

[0008] Obtaining a target speed of the generator according to the load index and a reference speed of the generator;

[0009] The speed of the wind turbine generator is adjusted according to the target speed.

[0010] Preferably, the wind turbine generator speed regulation method further comprises:

[0011] The target power corresponding to the target speed of the generator is checked.

[0012] Preferably, obtaining the load index of the generator according to the current load and the maximum load of each load monitoring point includes:

[0013] If the inflow wind speed of the wind turbine generator set is less than the cut-in wind speed of the wind turbine generator set, the load index is a set value;

[0014] If the inflow wind speed of the wind turbine set is greater than or equal to the cut-in wind speed of the wind turbine set and less than the rated wind speed of the wind turbine set, the load index of the generator is obtained according to the current load and the maximum load of the load monitoring point;

[0015] If the inflow wind speed of the wind turbine is greater than or equal to the rated wind speed of the wind turbine, the load index of the generator is obtained according to the current load, maximum load, the inflow wind speed and the cut-out wind speed of the wind turbine at the load monitoring point.

[0016] Preferably, if the inflow wind speed of the wind turbine set is greater than or equal to the cut-in wind speed of the wind turbine set and less than the rated wind speed of the wind turbine set, obtaining the load index of the generator according to the current load and the maximum load of the load monitoring point includes:

[0017] Calculating the ratio of the current load to the maximum load corresponding to each load monitoring point;

[0018] Taking the ratio of the current load corresponding to each load monitoring point to the maximum load as the exponent of the mathematical constant, obtaining the exponential power corresponding to each load monitoring point;

[0019] The average value of the exponential powers of all the load monitoring points is calculated, and the absolute value of the logarithmic function of the average value is calculated to obtain the load index of the generator.

[0020] Preferably, if the inflow wind speed of the wind turbine set is greater than or equal to the rated wind speed of the wind turbine set, the load index of the generator is obtained according to the current load, the maximum load, the inflow wind speed and the cut-out wind speed of the wind turbine set at the load monitoring point, including:

[0021] Calculating the product of the ratio of the current load to the maximum load corresponding to each load monitoring point and the ratio of the inflow wind speed to the cut-out wind speed;

[0022] Taking the product as the exponent of a mathematical constant, obtaining an exponential power corresponding to each load monitoring point;

[0023] The average value of the exponential powers of all the load monitoring points is calculated, and the absolute value of the logarithmic function of the average value is calculated to obtain the load index of the generator.

[0024] Preferably, obtaining the target speed of the generator according to the load index and the reference speed of the generator includes:

[0025] If the inflow wind speed of the wind turbine generator set is less than the cut-in wind speed of the wind turbine generator set, the reference speed is 0;

[0026] If the inflow wind speed of the wind turbine generator set is greater than or equal to the rated wind speed of the wind turbine generator set, the reference rotation speed is the rated rotation speed of the generator.

[0027] Preferably, the checking of the target power corresponding to the target speed of the generator includes:

[0028] If the target power passes the calibration, the target power is input into the generator control system;

[0029] If the target power check fails, the load index is corrected, and the target speed is updated according to the corrected load index.

[0030] In a second aspect, the present application provides a wind turbine generator speed regulating system, wherein the wind turbine generator includes a plurality of load monitoring points, and the wind turbine generator speed regulating system includes:

[0031] Load index calculation module: obtains the load index of the generator according to the current load and the maximum load of each load monitoring point;

[0032] A target speed calculation module is used to obtain a target speed of the generator according to the load index and the reference speed of the generator.

[0033] Speed ​​regulating module: regulating the speed of the wind turbine generator according to the target speed.

[0034] At the same time, the present invention also provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, and the above method is implemented when the processor executes the computer program.

[0035] At the same time, the present invention also provides a computer-readable storage medium, which stores a computer program for executing the above method.

[0036] It can be seen from the above technical scheme that the present application provides a method and system for regulating the speed of a wind turbine generator, in which load monitoring points are set at multiple main key points of the wind turbine generator, and the comprehensive load index analysis of the current load and the maximum load of multiple load monitoring points of the unit is used to perform real-time correction on the speed reference value of the wind turbine generator. On the premise of ensuring that the wind energy utilization coefficient of the wind turbine operation remains unchanged for most of the time, the system can sensitively respond to the dangerous load value signals of the key points, thereby reducing the risk of load exceeding the limit during the operation of the wind turbine and extending the operating life of the wind turbine.

[0037] In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0039] Figure 1 Schematic diagram of a flow chart of a method for adjusting the speed of a wind turbine generator in an embodiment of the present application.

[0040] Figure 2 Schematic diagram of a load index calculation process of a method for adjusting the speed of a wind turbine generator in an embodiment of the present application.

[0041] Figure 3 Schematic diagram of the structure of a wind turbine generator speed regulation system in an embodiment of the present application.

[0042] Figure 4 It is a schematic diagram of the structure of an electronic device in an embodiment of the present application. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0044] Considering that the existing technical solutions can ensure that the wind turbine generator outputs power at the maximum wind energy utilization coefficient most of the time, but it only adjusts the speed when the load is determined to be over-limit, and cannot adjust the operating status of the unit according to the current real-time torque value of the unit, the present application provides a wind turbine generator speed adjustment method, system, electronic device and computer-readable storage medium, which performs real-time correction on the wind turbine generator speed reference value by analyzing the comprehensive indicators of the current load and the maximum load of multiple main load monitoring points of the unit.

[0045] Based on the above content, the present application also provides a generator speed regulation device for implementing the wind turbine generator speed regulation method provided in one or more embodiments of the present application. The generator speed regulation device can be communicatively connected with a user client device, and the user client terminal device can be provided with multiple ones. The generator speed regulation device can specifically access the client terminal device through an application server.

[0046] Among them, the generator speed regulating device can receive the wind turbine generator speed regulating instruction from the client terminal device, and the generator speed regulating device obtains the load data, generator speed, wind speed and other related data of each load monitoring point of the wind turbine according to the wind turbine generator speed regulating instruction, and outputs the target speed of the generator according to all the load data, generator speed and wind speed data. Then, the generator speed regulating device can send the target speed of the generator to the client device for display, so that the user can obtain the target speed of the generator according to the client device and optimize the wind turbine.

[0047] It is understandable that the client device may include a smart phone, a tablet electronic device, a portable computer, a desktop computer, a personal digital assistant (PDA), etc.

[0048] In another practical application scenario, the part of adjusting the speed of the wind turbine generator can be performed in the classification processing center as described above, or all operations can be completed in the client device. The specific selection can be based on the processing capacity of the client device and the limitations of the user's usage scenario. This application is not limited to this. If all operations are completed in the client device, the client device may also include a processor for performing specific processing of adjusting the speed of the wind turbine generator.

[0049] The above-mentioned client device may have a communication module (i.e., a communication unit), which can be connected to a remote server for communication and data transmission with the server. For example, the communication unit may send a wind turbine generator speed adjustment instruction to a server in a classification processing center so that the server performs wind turbine generator speed adjustment processing according to the wind turbine generator speed adjustment instruction. The communication unit may also receive the target speed of the generator returned by the server. The server may include a server on the task scheduling center side, and other implementation scenarios may also include a server on an intermediate platform, such as a server on a third-party server platform that has a communication link with the task scheduling center server. The server may include a single computer device, or may include a server cluster consisting of multiple servers, or a server structure of a distributed device.

[0050] The server and the client device may communicate with each other using any suitable network protocol, including network protocols that have not yet been developed on the date of filing this application. The network protocols may include, for example, TCP / IP, UDP / IP, HTTP, HTTPS, etc. Of course, the network protocols may also include, for example, RPC (Remote Procedure Call Protocol) and REST (Representational State Transfer) protocols used on top of the above protocols.

[0051] The present application provides a method, system, electronic device and computer-readable storage medium for regulating the speed of a wind turbine generator. The wind turbine generator sets load monitoring points at multiple key points. The wind turbine generator performs real-time correction on the reference value of the speed of the wind turbine generator by analyzing the comprehensive load index of the current load and the maximum load of the multiple load monitoring points of the unit. Under the premise of ensuring that the wind energy utilization coefficient of the wind turbine operation remains unchanged for most of the time, the dangerous load value signal of the key point is sensitively responded to, thereby reducing the risk of load exceeding the limit during the operation of the wind turbine and extending the operating life of the wind turbine.

[0052] The details are described through the following multiple embodiments and application examples.

[0053] In order to solve the problem that the current wind turbine generator set cannot adjust the operating state of the set according to the real-time torque value of the current set, the present application provides an embodiment of a method for adjusting the speed of a wind turbine generator set, see Figure 1 The wind turbine generator includes a plurality of load monitoring points, and the wind turbine generator speed adjustment method specifically includes the following contents:

[0054] Step 100: Obtaining a load index of the generator according to the current load and the maximum load of each load monitoring point;

[0055] Step 200: Obtaining a target speed of the generator according to the load index and a reference speed of the generator;

[0056] Step 300: adjusting the speed of the wind turbine generator according to the target speed.

[0057] It is understandable that load, also called load, refers to external forces and other factors that cause internal forces and deformations in structures or components. Or it is customary to refer to various direct effects applied to engineering structures to produce effects on engineering structures or components. The real-time load value and maximum load value of each load monitoring point are obtained, and the comprehensive load index of the generator is obtained according to the current load and maximum load of each load monitoring point. The target speed of the generator is obtained according to the load index and the reference speed of the generator, and then the generator speed is adjusted to make the generator reach a steady state.

[0058] From the above description, it can be seen that an embodiment of the present application provides a method for regulating the speed of a wind turbine generator, in which load monitoring points are set at multiple main key points of the wind turbine generator, and the comprehensive load index analysis of the current load and the maximum load of multiple load monitoring points of the unit is performed to correct the speed reference value of the wind turbine generator in real time. On the premise of ensuring that the wind energy utilization coefficient of the wind turbine operation remains unchanged for most of the time, the method sensitively responds to the dangerous load value signals of the key points, thereby reducing the risk of load exceeding the limit during the operation of the wind turbine and extending the operating life of the wind turbine.

[0059] In one embodiment of a method for adjusting the speed of a wind turbine generator provided in the present application, see Figure 1 , before step 300, it also includes the following specific contents:

[0060] Step 2001: Check the target power corresponding to the target speed of the generator.

[0061] In this embodiment, a sudden change in the output power of the generator may easily cause a generator failure, so it is necessary to ensure that the increase or decrease in the output power of the generator is within the standard range. Therefore, it is necessary to calibrate the output power of the generator when it is running at the target speed to avoid failures caused by excessive increase or decrease in the output power of the motor.

[0062] In one embodiment of a method for adjusting the speed of a wind turbine generator provided in the present application, a preferred method for determining a generator load index is provided, see Figure 2 , step 100 specifically includes the following contents:

[0063] Step 111: if the inflow wind speed of the wind turbine generator set is less than the cut-in wind speed of the wind turbine generator set, the load index is a set value;

[0064] Step 112: if the inflow wind speed of the wind turbine generator set is greater than or equal to the cut-in wind speed of the wind turbine generator set and less than the rated wind speed of the wind turbine generator set, obtaining the load index of the generator according to the current load and the maximum load of the load monitoring point;

[0065] Step 113: If the inflow wind speed of the wind turbine is greater than or equal to the rated wind speed of the wind turbine, the load index of the generator is obtained according to the current load of the load monitoring point, the maximum load, the inflow wind speed and the cut-out wind speed of the wind turbine.

[0066] In this embodiment, the rotation speed of the generator is different under different working conditions. Therefore, it is necessary to judge the working condition of the generator according to the inflow wind speed of the generator, and obtain the current inflow wind speed, cut-in wind speed and rated wind speed of the generator. The inflow wind speed is the wind speed received by the impeller of the current wind turbine generator. The cut-in wind speed is the lowest wind speed at which the wind turbine generator can generate electricity. It will automatically shut down below this wind speed. The rated wind speed is the wind speed generated when the generator works normally under the matching power belt and runs at the best efficiency. If the inflow wind speed of the wind turbine is less than the cut-in wind speed of the wind turbine, the wind turbine engine will shut down at this time. At this time, the generator reference speed The value is 0, and the load index is π; if the inflow wind speed of the wind turbine set is greater than or equal to the cut-in wind speed of the wind turbine set and less than the rated wind speed of the wind turbine set, the generator is operating normally at this time, and the load index of the generator is obtained according to the current load and the maximum load of the load monitoring point; if the inflow wind speed of the wind turbine set is greater than or equal to the rated wind speed of the wind turbine set, the load index of the generator is obtained according to the current load, the maximum load, the inflow wind speed and the cut-out wind speed of the wind turbine set at the load monitoring point. The cut-out wind speed is the maximum wind speed of the wind turbine set for grid-connected power generation. If it exceeds this speed, the wind turbine set will be cut out of the grid, that is, the wind turbine will shut down and stop generating electricity.

[0067] From the above description, it can be seen that a method for regulating the speed of a wind turbine generator provided in an embodiment of the present application judges the operating condition of the wind turbine generator, analyzes the load index of the generator according to different working states of the generator, and can sensitively respond to dangerous load value signals at key points, thereby reducing the risk of overload during operation of the wind turbine and extending the operating life of the wind turbine.

[0068] In one embodiment of a method for adjusting the speed of a wind turbine generator provided in the present application, a preferred method for calculating a load index during normal operation of the generator is provided, wherein if the inflow wind speed of the wind turbine is greater than or equal to the cut-in wind speed of the wind turbine and less than the rated wind speed of the wind turbine, the load index of the generator is obtained according to the current load and the maximum load of the load monitoring point, including:

[0069] Calculating the ratio of the current load to the maximum load corresponding to each load monitoring point;

[0070] Taking the ratio of the current load corresponding to each load monitoring point to the maximum load as the exponent of the mathematical constant, obtaining the exponential power corresponding to each load monitoring point;

[0071] The average value of the exponential powers of all the load monitoring points is calculated, and the absolute value of the logarithmic function of the average value is calculated to obtain the load index of the generator.

[0072] In this embodiment, the above steps can be summarized as follows:

[0073]

[0074] The ratio of the current load to the maximum load corresponding to each load monitoring point is calculated as T1 / T1 max 、T2 / T2 max , TN / TN max And so on.

[0075] In this embodiment, the ratio of the current load corresponding to each load monitoring point to the maximum load is used as the exponent of the mathematical constant to obtain the exponential power corresponding to each load monitoring point, specifically:

[0076] In this embodiment, the average value of the exponential powers of all the load monitoring points is calculated, and the absolute value of the logarithmic function of the average value is calculated to obtain the load index of the generator, that is, the above-mentioned S.

[0077] In one embodiment of a method for adjusting the speed of a wind turbine generator provided in the present application, a preferred method for calculating a load index when the inflow wind speed is greater than the cut-out wind speed is provided, wherein if the inflow wind speed of the wind turbine is greater than or equal to the rated wind speed of the wind turbine, the load index of the generator is obtained according to the current load of the load monitoring point, the maximum load, the inflow wind speed and the cut-out wind speed of the wind turbine, including:

[0078] Calculating the product of the ratio of the current load to the maximum load corresponding to each load monitoring point and the ratio of the inflow wind speed to the cut-out wind speed;

[0079] Taking the product as the exponent of a mathematical constant, obtaining an exponential power corresponding to each load monitoring point;

[0080] The average value of the exponential powers of all the load monitoring points is calculated, and the absolute value of the logarithmic function of the average value is calculated to obtain the load index of the generator.

[0081] In this embodiment, the above steps can be summarized as follows:

[0082]

[0083] The ratio of the current load to the maximum load corresponding to each load monitoring point is calculated as T1 / T1 max 、T2 / T2 max , TN / TN max By analogy, the ratio of the inflow wind speed to the cut-out wind speed is specifically vwind / vout; the product of the ratio of the current load to the maximum load corresponding to each load monitoring point and the ratio of the inflow wind speed to the cut-out wind speed is calculated, specifically: And so on.

[0084] In this embodiment, the product is used as the exponent of a mathematical constant to obtain the exponential power corresponding to each load monitoring point, specifically:

[0085] In this embodiment, the average value of the exponential powers of all the load monitoring points is calculated, and the absolute value of the logarithmic function of the average value is calculated to obtain the load index of the generator, that is, the above-mentioned S.

[0086] In some specific implementations, obtaining the target speed of the generator according to the load index and the reference speed of the generator includes:

[0087] If the inflow wind speed of the wind turbine generator set is less than the cut-in wind speed of the wind turbine generator set, the reference speed is 0;

[0088] If the inflow wind speed of the wind turbine generator set is greater than or equal to the rated wind speed of the wind turbine generator set, the reference rotation speed is the rated rotation speed of the generator.

[0089] In one embodiment of a method for regulating the speed of a wind turbine generator provided in the present application, a preferred method for verifying a target speed of a generator is provided, wherein verifying a target power corresponding to the target speed of the generator includes:

[0090] If the target power passes the calibration, the target power is input into the generator control system;

[0091] If the target power check fails, the load index is corrected, and the target speed is updated according to the corrected load index.

[0092] In this embodiment, the output power of the generator at the target speed is obtained according to the speed-power curve of the generator to determine whether the difference between the power corresponding to the reference speed value generated at this time and the current power value of the generator is within a set range. If it is within the set range, the target wind speed is input into the generator control system to adjust the generator wind speed. If it is not within the set range, the generator load index is corrected, and a new generator target wind speed is recalculated according to the corrected load index, and then the generator speed is readjusted.

[0093] The following is a detailed description of a method for adjusting the speed of a wind turbine generator provided in an embodiment of the present application in conjunction with a specific embodiment:

[0094] Step (1): Input the real-time load T1~TN and the maximum load limit T1max~TNmax of the N load monitoring points of the unit

[0095] Step (2): Input the current inflow wind speed vwind, the current power value P0, and the current reference speed value of the generator w0.

[0096] Step (3): Determine the operating condition based on the current inflow wind speed. When the inflow wind speed is less than the unit cut-in wind speed, proceed to step (3a); when the inflow wind speed is greater than or equal to the cut-in wind speed and less than the rated wind speed, proceed to step (3b); when the inflow wind speed is greater than or equal to the rated wind speed, proceed to step (3c)

[0097] Step (3a) At this time, w0=0. S=π

[0098] Step (3b)

[0099]

[0100] Step (3c) Now w0 = w e , where w e is the rated speed of the generator.

[0101]

[0102] Where, vout is the cut-out wind speed of the fan.

[0103] Step (4) Correct the reference speed value of the generator at this time according to the calculated maximum load comprehensive index

[0104]

[0105] Step (5) determines whether the power P corresponding to the reference speed value generated at this time is less than or equal to 0.95P0 according to the speed-power curve of the generator. If yes, proceed to step (6); if not, proceed to step (7).

[0106] Step (6) Correct the maximum load comprehensive index

[0107] S=S×e 0.95×P0-P

[0108] And restore the reference speed value of the generator to w0, and return to step (4)

[0109] Step (7) is completed. The reference speed value of the generator at this time is output to the machine-side converter control system.

[0110] From the above description, it can be seen that the present application provides a method for regulating the speed of a wind turbine generator, in which load monitoring points are set at multiple main key points of the wind turbine generator, and the comprehensive load index analysis of the current load and the maximum load of multiple load monitoring points of the unit is performed to correct the speed reference value of the wind turbine generator in real time. On the premise of ensuring that the wind energy utilization coefficient of the wind turbine operation remains unchanged for most of the time, the method can sensitively respond to the dangerous load value signals of the key points, thereby reducing the risk of load exceeding the limit during the operation of the wind turbine and extending the operating life of the wind turbine.

[0111] In the second aspect, in order to solve the problem that the current wind turbine cannot adjust the operating state of the unit according to the real-time torque value of the current unit, the present application provides an embodiment of a wind turbine generator speed regulation system, see Figure 3 The wind turbine generator includes a plurality of load monitoring points, and the wind turbine generator speed regulating system includes:

[0112] Load index calculation module 01: obtain the load index of the generator according to the current load and maximum load of each load monitoring point;

[0113] Target speed calculation module 02: obtains the target speed of the generator according to the load index and the reference speed of the generator;

[0114] The speed regulating module 03 regulates the speed of the generator of the wind turbine according to the target speed.

[0115] In this embodiment, the wind turbine generator includes multiple load monitoring points. The load index calculation module 01 obtains relevant data such as the current load, maximum load, inflow wind speed, current power value of the generator and reference speed of each load monitoring point. The load index calculation module 01 determines the current operating condition of the wind turbine according to the inflow wind speed, calculates the load index of the generator according to different working conditions of the wind turbine, and transmits the generator load index to the target speed calculation module 02. The target speed calculation module 02 obtains the generator target speed according to the generator load index and the reference speed. The target speed calculation module 02 transmits the generator target speed to the speed adjustment module 03, and the speed adjustment module 03 adjusts the wind turbine according to the generator target speed.

[0116] From the above description, it can be seen that in a wind turbine generator speed regulation system provided in an embodiment of the present application, load monitoring points are set at multiple main key points of the wind turbine generator. The wind turbine generator speed reference value is corrected in real time by analyzing the comprehensive load indicators of the current load and the maximum load of multiple load monitoring points of the unit. On the premise of ensuring that the wind energy utilization coefficient of the wind turbine operation remains unchanged for most of the time, it responds sensitively to the dangerous load value signals of the key points, thereby reducing the risk of load exceeding the limit during the operation of the wind turbine and extending the operating life of the wind turbine.

[0117] In some specific implementations, the wind turbine generator speed regulation system further includes a target wind speed verification module for verifying the target power corresponding to the target speed of the generator.

[0118] The target wind speed verification module obtains the output power of the generator at the target speed according to the speed-power curve of the generator, and determines whether the difference between the power corresponding to the reference speed value generated at this time and the current power value of the generator is within the set range. If it is within the set range, the target wind speed is input into the generator control system to adjust the generator wind speed. If it is not within the set range, the generator load index is corrected, and a new generator target wind speed is recalculated according to the corrected load index, and then the generator speed is readjusted.

[0119] The following is a detailed description of a wind turbine generator speed control system provided by the present application in conjunction with a specific embodiment:

[0120] Step (1): Input the real-time load T1~TN and the maximum load limit T1max~TNmax of the N load monitoring points of the unit

[0121] Step (2): Input the current inflow wind speed vwind, the current power value P0, and the current reference speed value of the generator w0.

[0122] Step (3): Determine the operating condition based on the current inflow wind speed. When the inflow wind speed is less than the unit cut-in wind speed, proceed to step (3a); when the inflow wind speed is greater than or equal to the cut-in wind speed and less than the rated wind speed, proceed to step (3b); when the inflow wind speed is greater than or equal to the rated wind speed, proceed to step (3c)

[0123] Step (3a) At this time, w0=0. S=π

[0124] Step (3b)

[0125]

[0126] Step (3c) Now w0 = w e , where w e is the rated speed of the generator.

[0127]

[0128] Where, vout is the cut-out wind speed of the fan.

[0129] Step (4) Correct the reference speed value of the generator at this time according to the calculated maximum load comprehensive index

[0130]

[0131] Step (5) determines whether the power P corresponding to the reference speed value generated at this time is less than or equal to 0.95P0 according to the speed-power curve of the generator. If yes, proceed to step (6); if not, proceed to step (7).

[0132] Step (6) Correct the maximum load comprehensive index

[0133] S=S×e 0.95×P0-P

[0134] And restore the reference speed value of the generator to w0, and return to step (4)

[0135] Step (7) is completed. The reference speed value of the generator at this time is output to the machine-side converter control system.

[0136] From the hardware level, in order to solve the problem that the current wind turbine cannot adjust the operating state of the unit according to the real-time torque value of the current unit, the present application provides an embodiment of an electronic device of all or part of the contents of the wind turbine generator speed adjustment method, and the electronic device specifically includes the following contents:

[0137] Figure 4 FIG. 9 is a schematic block diagram of the system structure of the electronic device 9600 according to an embodiment of the present application. Figure 4As shown, the electronic device 9600 may include a central processor 9100 and a memory 9140; the memory 9140 is coupled to the central processor 9100. It is worth noting that Figure 4 is exemplary; other types of structures may also be used to supplement or replace this structure to implement telecommunication functions or other functions.

[0138] In one embodiment, the wind turbine generator speed regulation function may be integrated into a central processing unit. The central processing unit may be configured to perform the following control:

[0139] Step 100: Obtaining a load index of the generator according to the current load and the maximum load of each load monitoring point;

[0140] Step 200: Obtaining a target speed of the generator according to the load index and a reference speed of the generator;

[0141] Step 300: adjusting the speed of the wind turbine generator according to the target speed.

[0142] It is understandable that load, also called load, refers to external forces and other factors that cause internal forces and deformations in structures or components. Or it is customary to refer to various direct effects applied to engineering structures to produce effects on engineering structures or components. The real-time load value and maximum load value of each load monitoring point are obtained, and the comprehensive load index of the generator is obtained according to the current load and maximum load of each load monitoring point. The target speed of the generator is obtained according to the load index and the reference speed of the generator, and then the generator speed is adjusted to make the generator reach a steady state.

[0143] From the above description, it can be seen that an electronic device provided by an embodiment of the present application sets load monitoring points at multiple main key points of a wind turbine generator. By analyzing the comprehensive load indicators of the current load and the maximum load of multiple load monitoring points of the unit, the speed reference value of the wind turbine generator is corrected in real time. On the premise of ensuring that the wind energy utilization coefficient of the wind turbine operation remains unchanged for most of the time, it responds sensitively to the dangerous load value signals of the key points, thereby reducing the risk of load exceeding the limit during the operation of the wind turbine and extending the operating life of the wind turbine.

[0144] In another embodiment, the wind turbine generator speed regulating device can be configured separately from the central processor 9100. For example, the wind turbine generator speed regulating device can be configured as a chip connected to the central processor 9100, and the wind turbine generator speed regulating function can be realized through the control of the central processor.

[0145] like Figure 4As shown, the electronic device 9600 may also include: a communication module 9110, an input unit 9120, an audio processor 9130, a display 9160, and a power supply 9170. It is worth noting that the electronic device 9600 does not necessarily have to include Figure 4 In addition, the electronic device 9600 may also include Figure 4 For components not shown, reference may be made to the prior art.

[0146] like Figure 4 As shown, the central processing unit 9100 is sometimes also referred to as a controller or an operation control, and may include a microprocessor or other processor device and / or logic device. The central processing unit 9100 receives input and controls the operation of various components of the electronic device 9600.

[0147] The memory 9140 may be, for example, one or more of a cache, a flash memory, a hard drive, a removable medium, a volatile memory, a non-volatile memory or other suitable devices. The above-mentioned information related to the failure may be stored, and a program for executing the relevant information may also be stored. The CPU 9100 may execute the program stored in the memory 9140 to implement information storage or processing, etc.

[0148] The input unit 9120 provides input to the central processing unit 9100. The input unit 9120 is, for example, a key or a touch input device. The power supply 9170 is used to provide power to the electronic device 9600. The display 9160 is used to display display objects such as images and texts. The display may be, for example, an LCD display, but is not limited thereto.

[0149] The memory 9140 may be a solid-state memory, such as a read-only memory (ROM), a random access memory (RAM), a SIM card, etc. It may also be a memory that saves information even when the power is off, can be selectively erased, and is provided with more data, examples of which are sometimes referred to as EPROMs, etc. The memory 9140 may also be some other type of device. The memory 9140 includes a buffer memory 9141 (sometimes referred to as a buffer). The memory 9140 may include an application / function storage unit 9142, which is used to store application programs and function programs or processes for executing the operation of the electronic device 9600 through the central processor 9100.

[0150] The memory 9140 may also include a data storage unit 9143 for storing data, such as contacts, digital data, pictures, sounds, and / or any other data used by the electronic device. The driver storage unit 9144 of the memory 9140 may include various drivers for communication functions of the electronic device and / or for executing other functions of the electronic device (such as messaging applications, address book applications, etc.).

[0151] The communication module 9110 is a transmitter / receiver 9110 that sends and receives signals via an antenna 9111. The communication module (transmitter / receiver) 9110 is coupled to the central processor 9100 to provide input signals and receive output signals, which may be the same as the case of a conventional mobile communication terminal.

[0152] Based on different communication technologies, multiple communication modules 9110 may be provided in the same electronic device, such as a cellular network module, a Bluetooth module and / or a wireless LAN module, etc. The communication module (transmitter / receiver) 9110 is also coupled to a speaker 9131 and a microphone 9132 via an audio processor 9130 to provide an audio output via the speaker 9131 and receive an audio input from the microphone 9132, thereby realizing a common telecommunication function. The audio processor 9130 may include any suitable buffer, decoder, amplifier, etc. In addition, the audio processor 9130 is also coupled to the central processor 9100, so that recording can be performed on the local machine through the microphone 9132, and the sound stored on the local machine can be played through the speaker 9131.

[0153] The embodiments of the present application also provide a computer-readable storage medium capable of implementing all the steps in the method for adjusting the speed of a wind turbine generator in the above embodiment. The computer-readable storage medium stores a computer program. When the computer program is executed by a processor, all the steps in the method for adjusting the speed of a wind turbine generator in the above embodiment are implemented. For example, when the processor executes the computer program, the following steps are implemented:

[0154] Step 100: Obtaining a load index of the generator according to the current load and the maximum load of each load monitoring point;

[0155] Step 200: Obtaining a target speed of the generator according to the load index and a reference speed of the generator;

[0156] Step 300: adjusting the speed of the wind turbine generator according to the target speed.

[0157] It is understandable that load, also called load, refers to external forces and other factors that cause internal forces and deformations in structures or components. Or it is customary to refer to various direct effects applied to engineering structures to produce effects on engineering structures or components. The real-time load value and maximum load value of each load monitoring point are obtained, and the comprehensive load index of the generator is obtained according to the current load and maximum load of each load monitoring point. The target speed of the generator is obtained according to the load index and the reference speed of the generator, and then the generator speed is adjusted to make the generator reach a steady state.

[0158] From the above description, it can be seen that a computer-readable medium is provided in an embodiment of the present application, and load monitoring points are set at multiple main key points of the wind turbine generator. The wind turbine generator speed reference value is corrected in real time by analyzing the comprehensive load indicators of the current load and the maximum load of multiple load monitoring points of the unit. On the premise of ensuring that the wind energy utilization coefficient of the wind turbine operation remains unchanged for most of the time, the dangerous load value signal of the key point is sensitively responded to, thereby reducing the risk of load exceeding the limit during the operation of the wind turbine and extending the operating life of the wind turbine.

[0159] It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as methods, devices, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0160] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (apparatus), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0161] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0162] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0163] The present invention uses specific embodiments to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A method for adjusting the speed of a wind turbine generator, characterized in that: The wind turbine generator comprises a plurality of load monitoring points, and the wind turbine generator speed adjustment method comprises: Obtaining a load index of the generator according to the current load and the maximum load of each load monitoring point; Obtaining a target speed of the generator according to the load index and a reference speed of the generator; adjusting the speed of the wind turbine generator according to the target speed; The step of obtaining the load index of the generator according to the current load and the maximum load of each load monitoring point includes: If the inflow wind speed of the wind turbine generator set is less than the cut-in wind speed of the wind turbine generator set, the load index is a set value; If the inflow wind speed of the wind turbine set is greater than or equal to the cut-in wind speed of the wind turbine set and less than the rated wind speed of the wind turbine set, then obtaining the load index of the generator according to the current load and the maximum load of the load monitoring point; If the inflow wind speed of the wind turbine set is greater than or equal to the rated wind speed of the wind turbine set, the load index of the generator is obtained according to the current load of the load monitoring point, the maximum load, the inflow wind speed and the cut-out wind speed of the wind turbine set; If the inflow wind speed of the wind turbine set is greater than or equal to the cut-in wind speed of the wind turbine set and less than the rated wind speed of the wind turbine set, the load index of the generator is obtained according to the current load and the maximum load of the load monitoring point, including: Calculating the ratio of the current load to the maximum load corresponding to each load monitoring point; Taking the ratio of the current load corresponding to each load monitoring point to the maximum load as the exponent of the mathematical constant, obtaining the exponential power corresponding to each load monitoring point; Calculating an average value of the exponential powers of all the load monitoring points, and calculating an absolute value of a logarithmic function of the average value to obtain a load index of the generator; If the inflow wind speed of the wind turbine set is greater than or equal to the rated wind speed of the wind turbine set, the load index of the generator is obtained according to the current load of the load monitoring point, the maximum load, the inflow wind speed and the cut-out wind speed of the wind turbine set, including: Calculating the product of the ratio of the current load to the maximum load corresponding to each load monitoring point and the ratio of the inflow wind speed to the cut-out wind speed; Taking the product as the exponent of a mathematical constant, obtaining an exponential power corresponding to each load monitoring point; The average value of the exponential powers of all the load monitoring points is calculated, and the absolute value of the logarithmic function of the average value is calculated to obtain the load index of the generator.

2. The method for adjusting the speed of a wind turbine generator according to claim 1, characterized in that: The wind turbine generator speed regulation method further comprises: The target power corresponding to the target speed of the generator is checked.

3. The method for adjusting the speed of a wind turbine generator according to claim 1, characterized in that: The obtaining the target speed of the generator according to the load index and the reference speed of the generator includes: If the inflow wind speed of the wind turbine generator set is less than the cut-in wind speed of the wind turbine generator set, the reference speed is 0; If the inflow wind speed of the wind turbine generator set is greater than or equal to the rated wind speed of the wind turbine generator set, the reference rotation speed is the rated rotation speed of the generator.

4. The method for adjusting the speed of a wind turbine generator according to claim 2, characterized in that: The checking of the target power corresponding to the target speed of the generator includes: If the target power passes the calibration, the target power is input into the generator control system; If the target power check fails, the load index is corrected, and the target speed is updated according to the corrected load index.

5. A wind turbine generator speed regulation system, characterized in that: Based on the wind turbine generator speed regulation method according to any one of claims 1 to 4; the wind turbine generator comprises a plurality of load monitoring points, and the wind turbine generator speed regulation system comprises: Load index calculation module: obtains the load index of the generator according to the current load and the maximum load of each load monitoring point; A target speed calculation module is used to obtain a target speed of the generator according to the load index and the reference speed of the generator. Speed ​​regulating module: regulating the speed of the wind turbine generator according to the target speed.

6. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the program, the wind turbine generator speed regulation method according to any one of claims 1 to 4 is implemented.

7. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method for adjusting the speed of a wind turbine generator set according to any one of claims 1 to 4 is implemented.

Images