Backup power supply control apparatus, system, wind turbine, and method

Abstract

The present application relates to the technical field of wind turbines, in particular to a backup power supply control apparatus, a system, a wind turbine, and a method. The apparatus comprises: a nacelle vibration detection unit, used for monitoring vibration of a wind turbine nacelle and sending a detected first vibration signal to a backup power supply start-shutdown control unit; and a backup power supply start-shutdown control unit, used for acquiring a first vibration signal, determining the vibration state of blades on a wind turbine on the basis of the first vibration signal, and sending a starting command to a backup power supply when the vibration state indicates abnormal vibration. The backup power supply start-shutdown control unit is further used for acquiring composite vibration information, determining a vibration suppression result of the wind turbine on the basis of the composite vibration information, and sending a shutdown command to the backup power supply on the basis of the vibration suppression result so as to drive the backup power supply to be shut down. Therefore, the present application solves the problems of short duration of high-power electricity supply and poor economical efficiency when facing the risk of blade flutter after erection but before grid connection.

Description

Backup power supply control device, system, wind turbine generator set and method Technical Field

[0001] The present application relates to the technical field of wind turbines, and in particular to a backup power supply control device, system, wind turbine generator set and method. Background Art

[0002] When a long-bladed wind turbine is shut down, the specific wind speed, wind direction, and rotor azimuth angle create a combination of operating conditions, which can generate cumulative vibrations on the blades. This vibration can cause the blade life to decline rapidly, posing a significant risk. This risk can generally be significantly reduced by appropriately adjusting the wind direction angle within the wind turbine nacelle or the blade pitch angle. However, this adjustment requires that the wind turbine receive a sufficiently high-power supply. However, with current technology, the backup power sources commonly used for wind turbines (including diesel generators and energy storage) can only guarantee continuous operation of the wind turbine for dozens of hours, while the time between installation and grid connection can last for several months. This means that after installation and before grid connection, the wind turbine does not receive a continuous and effective high-power supply. Summary of the Invention

[0003] In view of this, the embodiments of the present application provide a backup power supply control device, system, wind turbine generator set and method, which can effectively solve the problem in the prior art that when the wind turbine generator is faced with the risk of blade flutter after completion of hoisting and before grid connection, the high-power power supply duration is short.

[0004] In a first aspect, an embodiment of the present application provides a backup power supply control device, the device comprising:

[0005] Cabin vibration detection unit and backup power supply start-stop control unit;

[0006] The nacelle vibration detection unit is used to monitor the vibration of the wind turbine nacelle and send the first vibration signal obtained by monitoring to the backup power supply start-stop control unit;

[0007] The backup power supply start-stop control unit is used to obtain the first vibration signal, determine the vibration state of the blades on the wind turbine according to the first vibration signal, and send a start command to the backup power supply when the vibration state is abnormal vibration;

[0008] The backup power supply start-stop control unit is also used to obtain comprehensive vibration information, determine the vibration suppression result of the wind turbine based on the comprehensive vibration information, and send a shutdown command to the backup power supply when the vibration suppression result is that vibration suppression is completed to drive the backup power supply to shut down; the comprehensive vibration information includes the first vibration signal.

[0009] In some embodiments, the startup command is used to drive the backup power supply to start and supply power to the wind turbine, so that the wind turbine performs a vibration suppression action according to a vibration suppression action strategy built into the wind turbine; the vibration suppression action includes adjusting a blade pitch or a nacelle wind direction angle;

[0010] The backup power supply start-stop control unit is further configured to be communicatively connected to the wind turbine; the comprehensive vibration information includes a second vibration signal and status information obtained by monitoring the wind turbine;

[0011] When obtaining comprehensive vibration information and determining the vibration suppression result of the wind turbine according to the comprehensive vibration information, the backup power supply start-stop control unit is specifically used to:

[0012] Acquiring a first vibration signal obtained by monitoring cabin vibration from the cabin vibration detection unit;

[0013] acquiring a second vibration signal and / or the state information from the wind turbine;

[0014] The vibration suppression result is determined according to the first vibration signal, the second vibration signal, and the state information.

[0015] In some embodiments, when determining the vibration suppression result according to the first vibration signal, the second vibration signal, and the state information, the backup power supply start-stop control unit is specifically configured to:

[0016] If a first condition is met, the vibration suppression result is confirmed to be completed, otherwise, the vibration suppression is confirmed to be incomplete; wherein the first condition includes: determining that the vibration state of the blade on the wind turbine is normal vibration according to the first vibration signal, and / or determining that the vibration state of the blade on the wind turbine is normal vibration according to the second vibration signal;

[0017] Alternatively, when the first condition and the second condition are met, the vibration suppression result is confirmed to be vibration suppression completed, otherwise it is confirmed that vibration suppression is not completed; wherein, the second condition includes that the blade pitch angle of the wind turbine is within a safe range; and the status information includes the blade pitch angle.

[0018] In some embodiments, when determining the vibration state of the blades on the wind turbine, the backup power supply start-stop control unit is specifically configured to:

[0019] Performing frequency domain analysis on the first vibration signal or the second vibration signal to obtain a corresponding vibration index;

[0020] When the vibration index exceeds a set upper threshold value of the index, the vibration state is determined to be abnormal vibration;

[0021] If the vibration index is less than the set index lower limit threshold, the vibration state is determined to be normal vibration;

[0022] The upper limit threshold of the indicator and the lower limit threshold of the indicator are both set according to the model of the wind turbine.

[0023] In some embodiments, the device further comprises a battery, wherein the battery is used to supply power to the cabin vibration detection unit and the backup power supply start-stop control unit;

[0024] The backup power supply start-stop control unit is further configured to drive the backup power supply to charge the battery according to a first battery endurance method; the first battery endurance method includes:

[0025] According to the battery life, the backup power supply is set to automatically start according to a predetermined time interval, and the running time of the backup power supply after starting is set, so that the backup power supply can regularly charge the battery.

[0026] In some embodiments, the backup power supply start-stop control unit is further configured to drive the backup power supply to charge the battery according to a second battery endurance method; the second battery endurance method includes:

[0027] The battery power status is obtained, and the start command or shutdown command is sent to the backup power supply according to the power status to start or shut down the backup power supply and charge or stop charging the battery.

[0028] In some embodiments, the device further includes: a photovoltaic panel and a charge-discharge controller configured according to the battery life; the backup power supply start-stop control unit is further configured to drive the backup power supply to charge the battery according to a third battery life method; the third battery life method includes:

[0029] The charge and discharge controller is driven to store the electrical energy of the photovoltaic panel in the battery, and the photovoltaic panel is controlled to supply power to the cabin vibration detection unit and the backup power supply start and stop control unit through the charge and discharge controller; when it is confirmed that the photovoltaic panel has no electrical energy output, the battery is controlled to supply power to the cabin vibration detection unit and the backup power supply start and stop control unit through the charge and discharge controller.

[0030] In a second aspect, an embodiment of the present application provides a power supply system, comprising a backup power supply and a backup power supply control device provided in the first aspect of the present application; the backup power supply control device is used to control the start and stop of the backup power supply;

[0031] The backup power supply is used to supply power to the wind turbine according to the start-up command, so as to drive the wind turbine to perform a vibration suppression action;

[0032] The backup power supply is further configured to shut down according to the shutdown command to stop providing power to the wind turbine.

[0033] In a third aspect, an embodiment of the present application provides a wind turbine generator set, which includes a wind turbine and a power supply system provided in the second aspect of the present application; the power supply system is used to supply power to the wind turbine.

[0034] In a fourth aspect, an embodiment of the present application provides a power supply control method, which is applicable to a backup power supply control device provided in the first aspect of the present application. The power supply control method includes:

[0035] Acquire a first vibration signal obtained by a nacelle vibration detection unit by monitoring the vibration condition of the wind turbine nacelle, and determine the vibration state of the blades on the wind turbine according to the first vibration signal;

[0036] If the vibration state is abnormal vibration, sending a start command to the backup power supply;

[0037] Obtain comprehensive vibration information and determine the vibration suppression result of the wind turbine based on the comprehensive vibration information, and send a shutdown command to the backup power supply when the vibration suppression result is that vibration suppression is completed; the comprehensive vibration information includes the first vibration signal; the shutdown command is used to drive the backup power supply to shut down.

[0038] The embodiments of the present application have the following beneficial effects:

[0039] The present application uses a nacelle vibration detection unit to detect nacelle vibration and obtain a first vibration signal. Based on the first vibration signal, the vibration state of the blades on the wind turbine is determined. When the vibration state is abnormal, the backup power supply is activated to control the backup power supply to supply power to the wind turbine, allowing the wind turbine to perform vibration suppression protection. The wind turbine's vibration suppression result is determined based on the acquired comprehensive vibration information, and when the vibration suppression protection action is complete, a shutdown command is sent to the backup power supply to drive the backup power supply to shut down and stop supplying power to the wind turbine. In other words, the present application uses a relatively low-power battery to power the nacelle vibration detection unit, and activates or deactivates a high-power backup power supply based on the vibration state to control power supply to the wind turbine, thereby conserving energy from the backup power supply and ensuring continued power supply to the wind turbine. Thus, the present application effectively addresses the prior art issue of short duration of high-power power supply to wind turbines after installation and before grid connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0041] FIG1 shows a schematic structural diagram of a backup power supply control device according to an embodiment of the present application;

[0042] FIG2 shows a second structural diagram of the backup power supply control device according to an embodiment of the present application;

[0043] FIG3 shows a third structural diagram of the backup power supply control device according to an embodiment of the present application;

[0044] FIG4 shows a fourth structural diagram of the backup power supply control device according to an embodiment of the present application;

[0045] FIG5 shows a schematic structural diagram of a backup power supply system according to an embodiment of the present application;

[0046] FIG6 shows a schematic structural diagram of a wind turbine generator set according to an embodiment of the present application;

[0047] FIG7 shows a flow chart of a power supply control method according to an embodiment of the present application;

[0048] FIG8 shows another flow chart of a power supply control method according to an embodiment of the present application;

[0049] FIG9 shows a schematic structural diagram of a power control software system according to an embodiment of the present application.

[0050] Description of main component symbols:

[0051] 110-cabin vibration detection unit; 120-backup power supply start-stop control unit; 130-backup power supply; 140-battery; 150-wind turbine; 160-photovoltaic panel; 170-charge and discharge controller; 910-vibration state detection module; 920-start-stop control module; 930-vibration suppression result determination module. DETAILED DESCRIPTION

[0052] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0053] The components of the embodiments of the present application generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but rather merely represents selected embodiments of the present application. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative effort are within the scope of protection of the present application.

[0054] Hereinafter, the terms "including", "having" and their cognates used in various embodiments of the present application are intended only to indicate specific features, numbers, steps, operations, elements, components or combinations of the aforementioned items, and should not be understood as excluding the existence of one or more other features, numbers, steps, operations, elements, components or combinations of the aforementioned items or adding the possibility of one or more features, numbers, steps, operations, elements, components or combinations of the aforementioned items. In addition, the terms "first", "second", "third" and the like are only used to distinguish descriptions and should not be understood as indicating or implying relative importance.

[0055] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by those skilled in the art to which the various embodiments of the present application belong. The terms (such as those defined in generally used dictionaries) will be interpreted as having the same meaning as in the context of the relevant technical field and will not be interpreted as having an idealized meaning or an overly formal meaning unless clearly defined in the various embodiments of the present application.

[0056] The following describes some embodiments of the present application in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0057] In the prior art, after the wind turbine generator set is installed, if it is temporarily not connected to the power grid, the wind turbine blades may flutter. The existing electrical control technology solution only adjusts the wind direction angle of the wind turbine cabin or the wind rotor pitch angle when the wind turbine is powered, in order to achieve the purpose of reducing the occurrence of flutter. However, under current technical conditions, the endurance of the backup power supply is insufficient, and it is difficult to provide long-term continuous power supply to the wind turbine. It is impossible to obtain economically feasible continuous high-power power supply in the prior art. Therefore, the present application proposes a backup power supply control device, system, wind turbine generator set and method, which can effectively solve the problems of the prior art in which the wind turbine generator faces the risk of blade flutter after the installation is completed and before it is connected to the grid, such as the short duration of high-power power supply and poor economy.

[0058] The backup power supply control device is described in detail below with reference to some specific embodiments.

[0059] FIG1 shows a schematic structural diagram of a backup power supply control device according to an embodiment of the present application. Exemplarily, the backup power supply control device is suitable for controlling the start and stop of the backup power supply. The backup power supply is used to power the wind turbine so that the wind turbine performs a vibration suppression action according to a vibration suppression action strategy built into the wind turbine. The backup power supply control device according to an embodiment of the present application includes: a cabin vibration detection unit 110 and a backup power supply start and stop control unit 120. The cabin vibration detection unit 110 and the backup power supply start and stop control unit 120 are communicatively connected. Exemplarily, the backup power supply start and stop control unit 120 is communicatively connected to the backup power supply 130 via an industrial communication bus, wireless communication, a dry node or a wet node, or Ethernet. The backup power supply 130 is any energy storage device capable of responding to start and stop commands. For example, the backup power supply 130 is a diesel generator with its own controller, or an energy storage device based on a supercapacitor or a fuel cell with its own controller.

[0060] The nacelle vibration detection unit 110 is configured to monitor the vibration of the wind turbine nacelle and transmit a first vibration signal obtained by monitoring to the backup power supply start / stop control unit 120. Blade vibration is transmitted to the nacelle, and the blade vibration condition can be inferred based on the nacelle's vibration frequency distribution. Therefore, the first vibration signal can be used to analyze blade vibration.

[0061] The backup power supply start / stop control unit 120 is configured to obtain the first vibration signal, determine the vibration state of the blades on the wind turbine based on the first vibration signal, and, if the vibration state is abnormal, send a start command to the backup power supply 130. The start command is configured to start the backup power supply 130 and supply power to the wind turbine, causing the wind turbine to perform a vibration suppression action according to a vibration suppression action strategy built into the wind turbine.

[0062] Specifically, vibration suppression strategies include yaw and pitch strategies. This means that when the wind turbine itself vibrates, it can suppress vibration by adjusting the blade pitch or the wind direction angle of the nacelle. Typically, the wind turbine is also equipped with a vibration detection sensor that, when powered, monitors the vibration of the wind turbine blades.

[0063] The backup power supply start-stop control unit 120 is also used to obtain comprehensive vibration information, determine the vibration suppression result of the wind turbine based on the comprehensive vibration information, and send a shutdown command to the backup power supply 130 when the vibration suppression result is that vibration suppression is completed to drive the backup power supply 130 to shut down; the comprehensive vibration information includes the first vibration signal.

[0064] In one embodiment, to improve the accuracy of controlling the backup power supply 130, as shown in Figure 2, the backup power supply start / stop control unit 120 is configured to be communicatively connected to the wind turbine. Generally, regardless of whether a nacelle vibration detection device is installed, the nacelle of the wind turbine is equipped with a vibration sensor that collects the vibration of the wind turbine nacelle, i.e., a second vibration signal. The comprehensive vibration information includes the second vibration signal monitored by the wind turbine and the first vibration signal collected by the nacelle vibration detection device.

[0065] When obtaining comprehensive vibration information and determining the vibration suppression result of the wind turbine according to the comprehensive vibration information, the backup power supply start-stop control unit 120 is specifically used to:

[0066] Acquiring a first vibration signal obtained by monitoring cabin vibration from the cabin vibration detection unit 110;

[0067] acquiring a second vibration signal from the wind turbine;

[0068] The vibration suppression result is determined according to the first vibration signal and the second vibration signal.

[0069] When determining the vibration suppression result according to the first vibration signal and the second vibration signal, the backup power supply start-stop control unit 120 is specifically configured to:

[0070] If a first condition is met, the vibration suppression result is confirmed as complete; otherwise, the vibration suppression is confirmed as incomplete. The first condition includes: determining that the vibration state of the wind turbine blades is normal based on the first vibration signal, or determining that the vibration state of the wind turbine blades is normal based on the second vibration signal; or, the first condition includes: determining that the vibration state of the wind turbine blades is normal based on the first vibration signal, and determining that the vibration state of the wind turbine blades is normal based on the second vibration signal.

[0071] In one embodiment, in order to improve the accuracy of controlling the backup power supply 130, the backup power supply start-stop control unit 120 is used to communicate with the wind turbine, and the comprehensive vibration information includes the second vibration signal and status information obtained by monitoring the wind turbine, and the status information includes blade angle information.

[0072] When obtaining comprehensive vibration information and determining the vibration suppression result of the wind turbine according to the comprehensive vibration information, the backup power supply start-stop control unit 120 is specifically used to:

[0073] Acquiring a first vibration signal obtained by monitoring cabin vibration from the cabin vibration detection unit 110;

[0074] acquiring a second vibration signal and the state information from the wind turbine;

[0075] The vibration suppression result is determined according to the first vibration signal, the second vibration signal, and the state information.

[0076] When determining the vibration suppression result according to the first vibration signal, the second vibration signal and the state information, the backup power supply start-stop control unit 120 is specifically configured to:

[0077] If both the first condition and the second condition are satisfied, the vibration suppression result is confirmed as complete; otherwise, the vibration suppression is confirmed as incomplete; wherein the second condition includes the blade pitch angle of the wind turbine being within a safe range. In other embodiments, the status information further includes a nacelle wind direction angle, and the second condition includes the nacelle wind direction angle of the wind turbine being within a safe range.

[0078] When determining the vibration state of the blades on the wind turbine, the backup power supply start-stop control unit 120 is specifically configured to:

[0079] Performing frequency domain analysis on the first vibration signal or the second vibration signal to obtain a corresponding vibration index;

[0080] When the vibration index exceeds a set upper threshold value of the index, the vibration state is determined to be abnormal vibration;

[0081] If the vibration index is less than the set index lower limit threshold, the vibration state is determined to be normal vibration;

[0082] The upper limit threshold and the lower limit threshold of the indicator are both set according to the model of the wind turbine. For example, when the vibration indicator adopts acceleration, some typical upper limit thresholds of acceleration are between 0.02 and 0.12 m / s^2.

[0083] In one embodiment, to improve economic efficiency, as shown in FIG3 , the device further includes a battery 140 for powering the cabin vibration detection unit 110 and the backup power supply start / stop control unit 120. For example, battery 140 may be a lead-acid battery, a lithium battery, or a supercapacitor. Battery 140 is electrically connected to each of the cabin vibration detection unit 110 and the backup power supply start / stop control unit 120.

[0084] The backup power supply start-stop control unit 120 is also used to drive the backup power supply 130 to charge the battery 140 according to the first battery life method, the second battery life method, the third battery life method or the fourth battery life method; or, use at least two of the above battery life methods to charge the battery 140.

[0085] The first battery life method includes:

[0086] According to the battery life of the battery 140, the backup power supply 130 is set to automatically start at a predetermined time interval, and the running time of the backup power supply 130 after starting is set, so that the backup power supply 130 can regularly charge the battery 140.

[0087] The second battery life method includes:

[0088] Obtain the battery power status, and send the start command or shutdown command to the backup power supply 130 according to the power status to start the backup power supply 130 to charge the battery 140, or shut down the backup power supply 130 to stop charging the battery 140.

[0089] The third battery life extension method is as shown in Figure 4 , adding a photovoltaic panel 160 and a charge-discharge controller 170 to the device based on the battery 140's lifespan. Both the photovoltaic panel 160 and the battery 140 are connected to the charge-discharge controller 170, which is in turn connected to the cabin vibration detection unit 110 and the backup power supply start-stop control unit 120. Both the photovoltaic panel 160 and the battery 140 can provide power to the cabin vibration detection unit 110 and the backup power supply start-stop control unit 120. For example, during the day, when the photovoltaic panel 160 has sufficient power, it charges the battery 140 and provides power to the cabin vibration detection unit 110 and the backup power supply start-stop control unit 120 through the charge-discharge controller 170. At night or when sunlight is insufficient, the battery 140 provides power to the cabin vibration detection unit 110 and the backup power supply start-stop control unit 120 through the charge-discharge controller 170.

[0090] The fourth battery life extension method is to manually and regularly replace the battery 140. In addition, the backup power supply start-stop control unit can obtain the battery 140 power status and send a warning message to the mobile terminal when the power status is lower than a set threshold to prompt the replacement of the battery 140.

[0091] FIG5 shows a schematic diagram of a power supply system according to an embodiment of the present application. Exemplarily, the power supply system includes: a backup power supply 130 and a backup power supply control device according to an embodiment of the present application; the backup power supply control device is configured to control the start and stop of the backup power supply 130;

[0092] The backup power supply 130 is used to supply power to the wind turbine according to the start command, so as to drive the wind turbine to perform vibration suppression action;

[0093] The backup power supply 130 is further configured to shut down according to the shutdown command to stop providing power to the wind turbine.

[0094] It can be understood that the power supply system of this embodiment corresponds to the backup power supply control device of the above embodiment, and the optional items in the above embodiment are also applicable to this embodiment, so they will not be described again here.

[0095] FIG6 shows a schematic structural diagram of a wind turbine generator set according to an embodiment of the present application. Exemplarily, the wind turbine generator set includes a wind turbine 150 and a power supply system according to an embodiment of the present application; the power supply system is configured to supply power to the wind turbine 150.

[0096] It can be understood that the wind turbine generator set of this embodiment corresponds to the power supply system of the above embodiment, and the options in the above embodiment are also applicable to this embodiment, so they will not be described again here.

[0097] The power control method of the embodiment of the present application is applicable to a backup power start / stop control unit 120 in a backup power control device.

[0098] As shown in Figure 7, the main principles of the power supply control method of the embodiment of the present application include: 1) With backup power supply 130 off, first determine whether blade vibration is abnormal. If blade vibration is normal, continue monitoring the blade vibration status. 2) If blade vibration is abnormal, activate backup power supply 130 to drive wind turbine 150 to perform vibration suppression. 3) Determine whether vibration suppression is complete. If vibration suppression is not complete, continue monitoring the vibration suppression status. 4) If vibration suppression is complete, drive the power supply off.

[0099] The power control method is described in detail below with reference to some specific embodiments.

[0100] FIG8 shows another flow chart of a power control method according to an embodiment of the present application. Exemplarily, the power control method includes the following steps:

[0101] S10 , obtaining a first vibration signal obtained by the nacelle vibration detection unit 110 by monitoring the vibration condition of the wind turbine nacelle, and determining the vibration state of the blades on the wind turbine 150 according to the first vibration signal.

[0102] The nacelle vibration detection unit 110 monitors the vibration of the nacelle in real time, obtains a first vibration signal, and sends the first vibration signal to the backup power supply start / stop control unit 120. The vibration state of the blades on the wind turbine 150 includes abnormal vibration and normal vibration.

[0103] S20: If the vibration state is abnormal vibration, a start command is sent to the backup power supply 130, and a vibration suppression protection action is executed after the wind turbine 150 receives power from the backup power supply 130. Specifically, the start command is used to drive the backup power supply 130 to start and provide power to the wind turbine 150, thereby waking up the wind turbine 150. After receiving power from the backup power supply 130, the wind turbine 150 executes the vibration suppression protection action. The vibration suppression protection action includes adjusting the wind direction angle of the nacelle or the blade pitch angle.

[0104] The backup power supply 130 starts up according to the startup command and provides power to the wind turbine 150. After receiving power, the wind turbine 150 can perform vibration suppression according to the vibration suppression strategy and monitor the vibration status of the blades of the wind turbine 150. Exemplarily, the wind turbine 150 is equipped with a vibration detection sensor, which monitors the vibration status of the blades and obtains a second vibration signal.

[0105] S30: Obtain comprehensive vibration information, determine a vibration suppression result for the wind turbine 150 based on the comprehensive vibration information, and send a shutdown command to the backup power supply 130 when the vibration suppression result indicates that vibration suppression is complete. The comprehensive vibration information includes the first vibration signal. The shutdown command is used to shut down the backup power supply 130, thereby stopping the supply of power to the wind turbine 150.

[0106] The step S30 of obtaining comprehensive vibration information and determining the vibration suppression result of the wind turbine 150 includes:

[0107] S31 , obtaining a first vibration signal obtained by monitoring cabin vibration from the cabin vibration detection unit 110 .

[0108] S32 , obtaining status information and a second vibration signal monitored by the wind turbine 150 from the wind turbine 150 ; the status information includes blade pitch angles.

[0109] S33: Determine the vibration suppression result according to the first vibration signal, the second vibration signal, and the state information.

[0110] Furthermore, determining the vibration suppression result according to the first vibration signal, the second vibration signal, and the vibration information in step S33 includes:

[0111] If it is determined according to the first vibration signal that the vibration state of the blades on the wind turbine 150 is normal vibration, or if it is determined according to the second vibration signal that the vibration state of the blades on the wind turbine 150 is normal vibration, then the vibration suppression result is confirmed to be vibration suppression completed; otherwise, it is confirmed that vibration suppression is not completed.

[0112] Alternatively, if the vibration state of the blades on the wind turbine 150 is determined to be normal vibration according to the first vibration signal, and if the vibration state of the blades on the wind turbine 150 is determined to be normal vibration according to the second vibration signal, then the vibration suppression result is confirmed to be vibration suppression completed, otherwise it is confirmed that vibration suppression is not completed.

[0113] Alternatively, if the vibration state of the blades of the wind turbine 150 is determined to be normal according to the first vibration signal or the vibration state of the blades of the wind turbine 150 is determined to be normal according to the second vibration signal, and the blade pitch angle of the wind turbine 150 is within a safe range, then the vibration suppression result is determined to be complete; otherwise, the vibration suppression result is determined to be incomplete. Specifically, a blade pitch angle of 80 to 95 degrees is considered to be within the safe range.

[0114] Alternatively, if it is determined based on the first vibration signal that the vibration state of the blades on the wind turbine 150 is normal vibration, and based on the second vibration signal that the vibration state of the blades on the wind turbine 150 is normal vibration, and the blade angle of the wind turbine 150 is within a safe range, then the vibration suppression result is confirmed to be vibration suppression completed; otherwise, it is confirmed that vibration suppression is not completed.

[0115] In one embodiment, determining the vibration state of the blades on the wind turbine 150 according to the first vibration signal or the second vibration signal includes:

[0116] In step S10, the first vibration signal is subjected to frequency domain analysis to obtain a vibration index.

[0117] In step S30, frequency domain analysis is performed on the first vibration signal or the second vibration signal to obtain corresponding vibration indicators.

[0118] If the vibration index exceeds the set upper limit threshold of the index, the vibration state is determined to be abnormal vibration; if the vibration index is less than the set lower limit threshold of the index, the vibration state is determined to be normal vibration; wherein, the upper limit threshold of the index and the lower limit threshold of the index are both set according to the model of the wind turbine 150, and further, the upper limit threshold of the index and the lower limit threshold of the index are set according to the blade length of the wind turbine model, and specifically the upper limit threshold of the index and the lower limit threshold of the index are obtained based on the statistics of the wind turbine operation data.

[0119] The above-mentioned vibration index can be the acceleration of vibration or the displacement amplitude of vibration, which is not limited here. Preferably, the above-mentioned vibration index is the acceleration of vibration, and the corresponding upper limit threshold of the index and the lower limit threshold of the index are also acceleration values. Specifically, the first vibration signal obtained by the cabin vibration detection unit 110 and the second vibration signal obtained by the sensor on the wind turbine 150 are converted from the time domain to the frequency domain and subjected to frequency domain analysis to obtain the amplitude of the signal. For example, the blade vibration frequency band is (0.3Hz, 2.0Hz), and the upper limit threshold of the index is set to 0.05 and the lower limit threshold of the index is set to 0.005 according to a certain model of the wind turbine 150. If the acceleration vibration index of the first vibration signal or the second vibration signal obtained in the blade frequency band is greater than the upper limit threshold of the index, the vibration state is determined to be abnormal vibration; if the acceleration vibration index obtained is less than the lower limit threshold of the index, the vibration state is determined to be normal vibration.

[0120] In one embodiment, the power control device further includes a battery 140, which is used to power the cabin vibration detection unit 110 and the backup power start / stop control unit 120. The power control method of this embodiment also includes a first battery endurance method, which includes:

[0121] According to the battery life of the battery 140 , the backup power supply 130 is set to automatically start at a predetermined time interval, and the operating time of the backup power supply 130 after starting is set, so that the backup power supply 130 can regularly charge the battery 140 .

[0122] Based on the current supply chain technology status and cost feasibility, the battery 140 can last for several days to three months without charging. If extreme long-term operation is taken into account, charging is required midway. For example, if during the design selection process, it is determined that the maximum time the battery 140 can last is about 10 days, then the backup power supply 130 can be set to start regularly, for example, once every 5 days. After the backup power supply 130 starts, it can charge the battery 140 and keep running for more than 2 hours before automatically shutting down to ensure that charging is effectively completed.

[0123] The power control method of this embodiment also includes a second battery life method. The second battery life method includes:

[0124] The battery power status is obtained, and the start command or shutdown command is sent to the backup power supply 130 based on the power status, so as to start the backup power supply 130 to charge the battery 140 or shut down the backup power supply 130 to stop charging the battery 140. For example, when the power status of the battery 140 is lower than a first set power threshold, the start command is sent to the backup power supply 130, and when the power status of the battery 140 is higher than a second set power threshold, the shutdown command is sent to the backup power supply 130.

[0125] The power control device also includes a photovoltaic panel 160 and a charge-discharge controller 170, which are added based on the battery life of the storage battery 140. The power control method of this embodiment also includes a third battery life method, which is as follows: driving the charge-discharge controller 170 to store the electrical energy of the photovoltaic panel 160 in the storage battery 140, and controlling the photovoltaic panel 160 to supply power to the cabin vibration detection unit 110 and the backup power supply start-stop control unit 120 via the charge-discharge controller 170; and when it is confirmed that the photovoltaic panel has no electrical energy output, controlling the storage battery to supply power to the cabin vibration detection unit and the backup power supply start-stop control unit via the charge-discharge controller.

[0126] Specifically, the charge-discharge controller 170 is driven to store the electrical energy of the photovoltaic panel 160 in the battery 140 based on the charge level of the battery 140, and the photovoltaic panel 160 is controlled to supply power to the cabin vibration detection unit 110 and the backup power supply start-stop control unit 120 via the charge-discharge controller 170. For example, when the charge level of the battery 140 is lower than a set threshold and the photovoltaic panel 160 is in an operating state, the charge-discharge controller 170 is driven to store the electrical energy of the photovoltaic panel 160 in the battery 140, and the photovoltaic panel 160 is controlled to supply power to the cabin vibration detection unit 110 and the backup power supply start-stop control unit 120 via the charge-discharge controller 170.

[0127] The power control method of this embodiment also includes a fourth battery life method, namely, manual replacement. Specifically, if it is determined during the design process that the maximum battery life of the battery 140 is approximately 50 days, the battery 140 can be replaced every 40 days, and the replaced battery 140 can be charged for the next use.

[0128] The backup power supply start / stop control unit 120 and the cabin vibration detection unit 110 may be integrated into the same hardware, or may be respectively provided on different hardware.

[0129] The software implementing the power control method of this embodiment may not be completely housed within the backup power supply control device. Alternatively, the backup power supply and the backup power supply control device may be packaged together to form an integrated backup power supply, and the implementation programs for the first and second battery life methods may be located within the integrated backup power supply. It should be understood that these are different implementations of the same method.

[0130] In this application, when the backup power supply 130 is shut down, the low-power battery 140 provides power to the nacelle vibration monitoring unit, enabling vibration detection of the wind turbine 150. The power supplied and consumed by the battery 140 is in the range of 5W to 40W. If the wind turbine 150 vibrates, blade vibration can be suppressed by manipulating the wind turbine 150 such as pitch or yaw. This action consumes power in the range of 10kW to 200kW. Only after the high-power backup power supply 130 is activated can the wind turbine 150 be provided with sufficient power to perform this action. In other words, the battery 140 is a low-power, low-capacity energy storage device that can support vibration detection by the nacelle vibration monitoring unit, but is insufficient to power the wind turbine 150. The backup power supply 130, on the other hand, is a high-power, high-capacity device that remains silent at all times and only provides the necessary power for suppressing blade vibration when the wind turbine 150 vibrates. Thus, the present application can save energy from backup power supply 130, ensuring that backup power supply 130 can provide vibration-suppressing energy to wind turbine 150 when abnormal vibration occurs, while also being economical. Thus, the present application can effectively address the prior art issues of short duration and poor economic efficiency of high-power supply to wind turbine 150 after installation and before grid connection.

[0131] 9 shows a schematic diagram of the structure of a power supply control software system according to an embodiment of the present application. Exemplarily, the power supply control software system includes: a vibration state detection module 910 , a start / stop control module 920 , and a vibration suppression result determination module 930 .

[0132] The vibration state detection module 910 is configured to obtain a first vibration signal obtained by the nacelle vibration detection unit 110 by monitoring the vibration of the wind turbine nacelle, and determine the vibration state of the blades on the wind turbine 150 based on the first vibration signal.

[0133] The start-stop control module 920 is configured to send a start command to the backup power supply 130 when the vibration state is abnormal; and to perform vibration suppression after the wind turbine 150 receives power from the backup power supply 130. Specifically, the start command is configured to start the backup power supply 130 and provide power to the wind turbine 150, thereby waking the wind turbine 150. After receiving power, the wind turbine 150 performs vibration suppression, which includes adjusting the wind direction angle of the nacelle or the blade pitch angle.

[0134] The vibration suppression result determination module 930 is configured to obtain comprehensive vibration information and determine, based on the comprehensive vibration information, a vibration suppression result of the wind turbine 150. The comprehensive vibration information includes the first vibration signal.

[0135] The start-stop control module 920 is further configured to send a shutdown command to the backup power supply 130 when the vibration suppression result indicates that vibration suppression is completed; the shutdown command is configured to drive the backup power supply 130 to shut down, so as to stop supplying power to the wind turbine 150 .

[0136] It can be understood that the software system of this embodiment corresponds to the power control method of the above embodiment, and the optional items in the above embodiment are also applicable to this embodiment, so they will not be described again here.

[0137] The present application also provides a terminal device. Exemplarily, the terminal device includes a processor and a memory, wherein the memory stores a computer program, and the processor runs the computer program to enable the terminal device to execute the functions of the various modules in the above-mentioned power control method or the above-mentioned power control device.

[0138] The processor can be an integrated circuit chip with signal processing capabilities. The processor can be a general-purpose processor, including at least one of a central processing unit (CPU), a graphics processing unit (GPU), a network processor (NP), a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. The general-purpose processor can be a microprocessor or any conventional processor, etc., and can implement or execute the various methods, steps, and logic block diagrams disclosed in the embodiments of this application.

[0139] The memory may be, but is not limited to, random access memory (RAM), read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), and electrically erasable programmable read-only memory (EEPROM). The memory is used to store computer programs, and the processor can execute the computer programs accordingly after receiving an execution instruction.

[0140] The present application also provides a readable storage medium for storing the computer program used in the above-mentioned terminal device.

[0141] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can also be implemented in other ways. The device embodiments described above are merely schematic. For example, the flowcharts and structure diagrams in the accompanying drawings show the possible architectures, functions and operations of the devices, methods and computer program products according to the multiple embodiments of the present application. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of the code, and the module, program segment or a part of the code contains one or more executable instructions for implementing the specified logical functions. It should also be noted that in an alternative implementation, the functions marked in the box can also occur in an order different from that marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the structure diagram and / or flowchart, and the combination of boxes in the structure diagram and / or flowchart, can be implemented using a dedicated hardware-based system that performs the specified function or action, or can be implemented using a combination of dedicated hardware and computer instructions.

[0142] In addition, the functional modules or units in the various embodiments of the present application can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0143] If the functions are implemented in the form of software function modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a number of instructions for enabling a computer device (which can be a smart phone, personal computer, server, or network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0144] The above is only a specific implementation method of the present application, but the scope of protection of the present application is not limited thereto. Any technician familiar with this technical field can easily think of changes or replacements within the technical scope disclosed in this application, which should be covered by the scope of protection of the present application.

Claims

1. A backup power supply control device, characterized in that: The device comprises: Cabin vibration detection unit and backup power supply start-stop control unit; The nacelle vibration detection unit is used to monitor the vibration of the nacelle of the wind turbine generator, and send the first vibration signal obtained by monitoring to the backup power supply start-stop control unit; The backup power supply start-stop control unit is used to obtain the first vibration signal, determine the vibration state of the blades on the wind turbine according to the first vibration signal, and send a start command to the backup power supply when the vibration state is abnormal vibration; The backup power supply start and stop control unit is also used to obtain comprehensive vibration information, and determine the vibration suppression result of the wind turbine based on the comprehensive vibration information, and send a shutdown command to the backup power supply when the vibration suppression result is that vibration suppression is completed to drive the backup power supply to shut down; the comprehensive vibration information includes the first vibration signal.

2. The backup power supply control device according to claim 1, characterized in that: The start command is used to drive the backup power supply to start and supply power to the wind turbine, so that the wind turbine performs a vibration suppression action according to a vibration suppression action strategy built into the wind turbine; the vibration suppression action includes adjusting a blade angle or a nacelle wind direction angle; The backup power supply start-stop control unit is also used for communication connection with the wind turbine; the comprehensive vibration information includes the second vibration signal and status information obtained by monitoring the wind turbine; When obtaining the comprehensive vibration information and determining the vibration suppression result of the wind turbine according to the comprehensive vibration information, the backup power supply start-stop control unit is specifically used to: Acquiring a first vibration signal obtained by monitoring cabin vibration from the cabin vibration detection unit; Acquiring a second vibration signal and / or the state information from the wind turbine; The vibration suppression result is determined according to the first vibration signal, the second vibration signal, and the state information.

3. The backup power supply control device according to claim 2, characterized in that: When determining the vibration suppression result according to the first vibration signal, the second vibration signal and the state information, the backup power supply start-stop control unit is specifically used for: When the first condition is met, the vibration suppression result is confirmed to be completed, otherwise it is confirmed that the vibration suppression is not completed; wherein the first condition includes: determining that the vibration state of the blade on the wind turbine is normal vibration according to the first vibration signal, and / or determining that the vibration state of the blade on the wind turbine is normal vibration according to the second vibration signal; Alternatively, when the first condition and the second condition are met, the vibration suppression result is confirmed to be vibration suppression completed, otherwise it is confirmed that vibration suppression is not completed; wherein, the second condition includes that the blade pitch angle of the wind turbine is within a safe range; and the status information includes the blade pitch angle.

4. The backup power supply control device according to claim 3, characterized in that: When determining the vibration state of the blades on the wind turbine, the backup power supply start-stop control unit is specifically used to: Performing frequency domain analysis on the first vibration signal or the second vibration signal to obtain a corresponding vibration index; When the vibration index exceeds a set index upper limit threshold, the vibration state is determined to be abnormal vibration; If the vibration index is less than the set index lower limit threshold, the vibration state is determined to be normal vibration; Wherein, the upper limit threshold of the indicator and the lower limit threshold of the indicator are both set according to the model of the wind turbine.

5. The backup power supply control device according to claim 1, characterized in that: The device further comprises a battery, which is used to supply power to the cabin vibration detection unit and the backup power supply start-stop control unit; The backup power supply start-stop control unit is also used to drive the backup power supply to charge the battery according to the first battery endurance method; the first battery endurance method includes: According to the battery life, the backup power supply is set to automatically start at a predetermined time interval, and the running time of the backup power supply after starting is set, so that the backup power supply can charge the battery regularly.

6. The backup power supply control device according to claim 5, characterized in that: The backup power supply start-stop control unit is also used to drive the backup power supply to charge the battery according to the second battery endurance method; the second battery endurance method includes: The battery power status is obtained, and the start command or shutdown command is sent to the backup power supply according to the power status to start or shut down the backup power supply and charge or stop charging the battery.

7. The backup power supply control device according to claim 5 or 6, characterized in that: The device further includes: a photovoltaic panel and a charge and discharge controller added according to the battery life; the backup power supply start-stop control unit is also used to drive the backup power supply to charge the battery according to the third battery life method; the third battery life method includes: The charge and discharge controller is driven to store the electric energy of the photovoltaic panel into the battery, and the photovoltaic panel is controlled to supply power to the cabin vibration detection unit and the backup power supply start and stop control unit through the charge and discharge controller; when it is confirmed that the photovoltaic panel has no electric energy output, the battery is controlled to supply power to the cabin vibration detection unit and the backup power supply start and stop control unit through the charge and discharge controller.

8. A power supply system, characterized in that: The power supply system comprises a backup power supply and a backup power supply control device according to any one of claims 1 to 7; the backup power supply control device is used to control the start and stop of the backup power supply; The backup power supply is used to supply power to the wind turbine generator according to the start command, so as to drive the wind turbine generator to perform a vibration suppression action; The backup power supply is also used to shut down according to the shutdown command to stop providing power to the wind turbine.

9. A wind turbine generator set, characterized in that: The wind turbine generator set comprises a wind turbine and the power supply system according to claim 8; the power supply system is used to supply power to the wind turbine.

10. A power supply control method, the method being applicable to the backup power supply control device according to any one of claims 1 to 7, characterized in that: The power control method comprises: Acquire a first vibration signal obtained by a nacelle vibration detection unit by monitoring the vibration condition of the nacelle of the wind turbine generator, and determine the vibration state of the blades on the wind turbine generator according to the first vibration signal; If the vibration state is abnormal vibration, sending a start command to the backup power supply; Acquire comprehensive vibration information and determine the vibration suppression result of the wind turbine according to the comprehensive vibration information, and send a shutdown command to the backup power supply when the vibration suppression result is that vibration suppression is completed; the comprehensive vibration information includes the first vibration signal; the shutdown command is used to drive the backup power supply to shut down.

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