A backup power supply control device, system, wind turbine generator set and method

Abstract

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. The device includes: a cabin vibration detection unit for monitoring the vibration of the wind turbine cabin, and sending 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, and 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-stop control unit is also used to obtain 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 according to the vibration suppression result to drive the backup power supply to shut down. Therefore, the present application can effectively increase the continuous power supply time of the backup power supply to maintain the availability of the flutter suppression system.

Description

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-blade wind turbine is in a shutdown state, a specific wind speed, wind direction and rotor azimuth form a combined operating condition, under which cumulative vibration will be generated on the blades. This vibration can cause the blade life to decay rapidly, which poses a great risk. Generally, the probability of this risk can be greatly reduced by properly adjusting the wind direction angle of the wind turbine cabin or the blade angle. However, the premise for executing this adjustment action is that the wind turbine is powered by a sufficiently high power supply. However, the backup power supply commonly used for wind turbines (including diesel generators, energy storage, etc.) can only ensure that the wind turbine continues to work for dozens of hours at the current technical level, and the time between the completion of the hoisting and the grid connection can last for several months. In other words, after the wind turbine is hoisted and before it is connected to the grid, it cannot obtain continuous and effective high-power 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 increase the continuous power supply time of the backup power supply after the wind turbine generator is installed and before it is connected to the grid, so as to maintain the availability of the flutter suppression system.

[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 nacelle of the wind turbine generator, 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 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.

[0009] In some embodiments, 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;

[0010] 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;

[0011] 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:

[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 used to:

[0016] 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;

[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 used 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 index upper limit threshold, 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] 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.

[0023] In some embodiments, the device further comprises a battery, and 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 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:

[0025] 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.

[0026] In some embodiments, the backup power supply start-stop control unit is further used 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 and discharge controller added according to the battery life; the backup power supply start-stop control unit is further used to drive the backup power supply to charge the battery according to the third battery life method; the third battery life method includes:

[0029] 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.

[0030] In a second aspect, an embodiment of the present application provides a power supply system, the 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 generator according to the start command, so as to drive the wind turbine generator to perform a vibration suppression action;

[0032] The backup power supply is also used 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 control method, which is applicable to a backup power control device provided in the first aspect of the present application, and the power control method includes:

[0035] 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;

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

[0037] 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.

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

[0039] The present application detects the vibration of the cabin through the cabin vibration detection unit, and obtains a first vibration signal, determines the vibration state of the blades on the wind turbine according to the first vibration signal, and controls the start of the backup power supply when the vibration state is abnormal vibration, so as to realize the control of the backup power supply to supply power to the wind turbine, so that the wind turbine performs the vibration suppression protection action; determines the vibration suppression result of the wind turbine according to the acquired comprehensive vibration information, and sends a shutdown command to the backup power supply when the vibration suppression protection action is completed, so as to drive the backup power supply to shut down and stop providing power to the wind turbine. That is to say, the present application uses a relatively low-power battery to power the cabin vibration detection unit, and starts or stops the high-power backup power supply according to the vibration state to control the power supply to the wind turbine, thereby realizing the purpose of saving the electric energy of the backup power supply and ensuring the purpose of supplying power to the wind turbine for a long time. Therefore, the present application can effectively solve the problem of the short duration of high-power power supply obtained by the wind turbine after the completion of the hoisting and before the grid connection in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. 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 related drawings can be obtained based on these drawings without paying creative work.

[0041] Figure 1 A schematic diagram of the structure of a backup power supply control device according to an embodiment of the present application is shown;

[0042] Figure 2 A second structural schematic diagram of the backup power supply control device according to an embodiment of the present application is shown;

[0043] Figure 3 A third structural schematic diagram of the backup power supply control device according to an embodiment of the present application is shown;

[0044] Figure 4 A fourth structural schematic diagram of the backup power supply control device according to an embodiment of the present application is shown;

[0045] Figure 5 A schematic diagram of the structure of the backup power supply system according to an embodiment of the present application is shown;

[0046] Figure 6 A schematic structural diagram of a wind turbine generator set according to an embodiment of the present application is shown;

[0047] Figure 7 A schematic diagram of a flow chart of a power supply control method according to an embodiment of the present application is shown;

[0048] Figure 8 Another flow chart of a power control method according to an embodiment of the present application is shown;

[0049] Fig. 9 A structural schematic diagram of a power control software system according to an embodiment of the present application is shown.

[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 of the embodiments.

[0053] The components of the embodiments of the present application generally described and shown in the drawings herein may be arranged and designed in various 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 application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

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

[0055] Unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meanings as those generally 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 meanings as the contextual meanings in the relevant technical field and will not be interpreted as having idealized meanings or overly formal meanings unless clearly defined in the various embodiments of the present application.

[0056] In conjunction with the accompanying drawings, some embodiments of the present application are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can 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 short duration and poor economy of high-power power supply when the wind turbine generator faces the risk of blade flutter after the installation is completed and before the grid is connected in the prior art.

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

[0059] Figure 1 A structural schematic diagram of a backup power supply control device of an embodiment of the present application is shown. 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 the vibration suppression action strategy built into the wind turbine. The backup power supply control device of the 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. Among them, the backup power supply 130 is any energy storage device that can respond to a start and stop command. For example, the backup power supply 130 is a diesel generator with a built-in controller, or an energy storage device based on a supercapacitor or a fuel cell with a built-in controller.

[0060] The nacelle vibration detection unit 110 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 120. The blade vibration will be transmitted to the nacelle, and the blade vibration condition can also be inferred based on the vibration frequency domain distribution of the nacelle, so the first vibration signal can be used to analyze the blade vibration.

[0061] The backup power supply start-stop control unit 120 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 when the vibration state is abnormal vibration, send a start command to the backup power supply 130. The start command is used to drive the backup power supply 130 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.

[0062] Specifically, the vibration suppression action strategy includes a yaw strategy and a pitch control strategy, that is, when the wind turbine itself vibrates, the vibration can be suppressed by adjusting the blade pitch angle or adjusting the wind direction angle of the nacelle. Generally, a vibration detection sensor is also provided on the wind turbine, and after receiving power, the vibration detection sensor also detects the vibration of the wind turbine blades.

[0063] The backup power supply start and stop control unit 120 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 130 when the vibration suppression result is that vibration suppression is completed, so as to drive the backup power supply 130 to shut down; the comprehensive vibration information includes the first vibration signal.

[0064] In one embodiment, in order to improve the accuracy of controlling the backup power supply 130, as Figure 2 As shown, the backup power supply start-stop control unit 120 is used to communicate with the wind turbine. Generally, regardless of whether there is a cabin vibration detection device, the cabin of the wind turbine is equipped with a vibration sensor, which collects the vibration of the wind turbine cabin, that is, the 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 cabin vibration detection device.

[0065] 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 120 is specifically used for:

[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 used for:

[0070] 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. The first condition includes: determining that the vibration state of the blades on the wind turbine is normal vibration according to the first vibration signal, or determining that the vibration state of the blades on the wind turbine is normal vibration according to the second vibration signal; or, the first condition includes: determining that the vibration state of the blades on the wind turbine is normal vibration according to the first vibration signal, and determining that the vibration state of the blades on the wind turbine is normal vibration according to 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 and 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 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 120 is specifically used for:

[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 used for:

[0077] When the first condition and the second condition are met, the vibration suppression result is confirmed to be completed, otherwise it is confirmed that the vibration suppression is not completed; wherein the second condition includes that the blade pitch angle of the wind turbine is within a safe range. In other embodiments, the state information also includes a nacelle wind direction angle, and the second condition includes that the nacelle wind direction angle of the wind turbine is 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 used 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 index upper limit threshold, 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 of the indicator 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, in order to improve economic efficiency, Figure 3 As shown, the device further includes a battery 140, and the battery 140 is used to power the cabin vibration detection unit 110 and the backup power supply start-stop control unit 120. For example, the battery 140 is a lead-acid battery, a lithium battery or a supercapacitor, etc. The battery 140 is electrically connected to the cabin vibration detection unit 110 and the backup power supply start-stop control unit 120, respectively.

[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 comprises:

[0086] According to the battery life of the storage 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 charge the storage battery 140 regularly.

[0087] The second battery life method comprises:

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

[0089] The third battery life method is: Figure 4As shown, the photovoltaic panel 160 and the charge and discharge controller 170 are added to the device according to the battery life of the battery 140. The photovoltaic panel 160 and the battery 140 are both connected to the charge and discharge controller 170, and the charge and discharge controller 170 is connected to the cabin vibration detection unit 110 and the backup power supply start and stop control unit 120. The photovoltaic panel 160 and the battery 140 can both provide power for the cabin vibration detection unit 110 and the backup power supply start and stop control unit 120. For example, during the day, when the photovoltaic panel 160 has sufficient power, the photovoltaic panel 160 charges the battery 140, and provides power for the cabin vibration detection unit 110 and the backup power supply start and stop control unit 120 through the charge and discharge controller 170. At night or when light energy is insufficient, the battery 140 provides power for the cabin vibration detection unit 110 and the backup power supply start and stop control unit 120 through the charge and discharge controller 170.

[0090] The fourth battery life method is to manually replace the battery 140 regularly. In addition, the backup power supply start-stop control unit can obtain the power status of the battery 140, 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] Figure 5 A schematic diagram of the structure of the power supply system of the embodiment of the present application is shown. Exemplarily, the power supply system includes: a backup power supply 130 and a backup power supply control device of the embodiment of the present application; the backup power supply control device is used 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 generator according to the start command, so as to drive the wind turbine generator to perform a vibration suppression action;

[0093] The backup power supply 130 is also used 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 options in the above embodiment are also applicable to this embodiment, so they will not be described repeatedly here.

[0095] Figure 6 A structural schematic diagram of a wind turbine generator set according to an embodiment of the present application is shown. 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 used 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 repeatedly 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] like Figure 7 As shown, the main idea of ​​the power supply control method of the embodiment of the present application includes: 1) When the backup power supply 130 is turned off, first determine whether the blade vibration is abnormal. If the blade vibration is normal, continue to monitor the blade vibration state. 2) If the blade vibration is abnormal, control the start of the backup power supply 130 to drive the wind turbine 150 to perform vibration suppression. 3) Determine whether the vibration suppression is completed. If the vibration suppression is not completed, continue to monitor the vibration suppression state. 4) If the vibration suppression is completed, drive to turn off the power supply.

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

[0100] Figure 8 Another flow chart of the power control method according to an embodiment of the present application is shown.

[0101] Exemplarily, the power control method comprises the following steps:

[0102] 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.

[0103] The cabin vibration detection unit 110 monitors the vibration of the cabin 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.

[0104] 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 performed after the wind turbine 150 is powered by the backup power supply 130. Specifically, the start command is used to drive the backup power supply 130 to start and provide electric energy to the wind turbine 150 to wake up the wind turbine 150, and the wind turbine 150 performs a vibration suppression protection action after being powered by the backup power supply 130. The vibration suppression protection action includes adjusting the wind direction angle of the nacelle or the blade angle action.

[0105] The backup power supply 130 is started according to the start command and provides power to the wind turbine 150. After being powered, the wind turbine 150 can perform a vibration suppression action according to the vibration suppression action strategy and monitor the vibration condition of the blades of the wind turbine 150. Exemplarily, a vibration detection sensor is provided on the wind turbine 150, and the vibration condition of the blades is monitored by the vibration detection sensor to obtain a second vibration signal.

[0106] S30, acquiring comprehensive vibration information and determining the vibration suppression result of the wind turbine 150 according to the comprehensive vibration information, and sending a shutdown command to the backup power supply 130 when the vibration suppression result is that the vibration suppression is completed. The comprehensive vibration information includes the first vibration signal. The shutdown command is used to drive the backup power supply 130 to shut down to stop providing power to the wind turbine 150.

[0107] The step S30 of obtaining comprehensive vibration information and determining the vibration suppression result of the wind turbine 150 includes:

[0108] S31 , obtaining a first vibration signal obtained by monitoring cabin vibration from the cabin vibration detection unit 110 .

[0109] S32, acquiring status information and a second vibration signal monitored by the wind turbine 150 from the wind turbine 150; the status information includes a blade pitch angle.

[0110] S33: Determine the vibration suppression result according to the first vibration signal, the second vibration signal and the state information.

[0111] Further, the step S33 of determining the vibration suppression result according to the first vibration signal, the second vibration signal and the vibration information includes:

[0112] 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 it is confirmed that the vibration suppression result is vibration suppression completed, otherwise it is confirmed that vibration suppression is not completed.

[0113] Alternatively, 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, and 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.

[0114] 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 or the vibration state of the blades on the wind turbine 150 is determined to be normal vibration 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 confirmed to be vibration suppression completed, otherwise it is confirmed that vibration suppression is not completed. Wherein, the blade pitch angle is within a safe range when it is 80 to 95 degrees.

[0115] Alternatively, 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, and it is determined according to 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 it is confirmed that the vibration suppression result is vibration suppression completed, otherwise it is confirmed that vibration suppression is not completed.

[0116] 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:

[0117] In step S10, the first vibration signal is subjected to frequency domain analysis to obtain a vibration index.

[0118] In step S30, frequency domain analysis is performed on the first vibration signal or the second vibration signal to obtain corresponding vibration indicators.

[0119] If the vibration index exceeds the set upper index threshold, the vibration state is determined to be abnormal vibration; if the vibration index is less than the set lower index threshold, the vibration state is determined to be normal vibration; wherein, the upper index threshold and the lower index threshold are both set according to the model of the wind turbine 150, and further, the upper index threshold and the lower index threshold are set according to the blade length of the wind turbine model, and specifically, the upper index threshold and the lower index threshold are obtained according to the statistics of the wind turbine operation data.

[0120] 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 amplitude of the signal is obtained by converting 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 from the time domain to the frequency domain and performing frequency domain analysis. 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.

[0121] In one embodiment, the power control device further includes a battery 140, and the battery 140 is used to supply power to 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 battery first endurance method, and the battery first endurance method includes:

[0122] According to the battery life of the storage 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 charge the storage battery 140 regularly.

[0123] According to the current status of supply chain technology and cost feasibility, the battery life of the battery 140 without charging is several days to three months. If extreme long-term working conditions are taken into consideration, charging is required halfway. For example, if during the design selection, it is confirmed that the longest time that the battery 140 can last is about 10 days, then the backup power supply 130 is set to start regularly, such as configuring it to start automatically once every 5 days. After the backup power supply 130 starts automatically, it can charge the battery 140 and keep running for more than 2 hours before automatically shutting down to ensure that the charging is effectively completed.

[0124] The power control method of this embodiment also includes a second battery life method. The second battery life method includes:

[0125] The battery power state is obtained, and the start command or shutdown command is sent to the backup power supply 130 according to the power state, 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 state 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 is higher than a second set power threshold, the shutdown command is sent to the backup power supply 130.

[0126] The power control device also includes a photovoltaic panel 160 and a charge and discharge controller 170 that are added according to the battery life of the storage battery 140. The power control method of this embodiment also includes a third battery life method, which is: driving the charge and discharge controller 170 to store the electric 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 and stop control unit 120 through the charge and discharge controller 170; when it is confirmed that the photovoltaic panel has no power output, controlling the storage battery 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.

[0127] Specifically, the charge and discharge controller 170 is driven to store the electric energy of the photovoltaic panel 160 in the battery 140 according to the electric power 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 through the charge and discharge controller 170. For example, when the electric power state of the battery 140 is lower than the set threshold value, and the photovoltaic panel 160 is in the working state, the charge and discharge controller 170 is driven to store the electric 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 through the charge and discharge controller 170.

[0128] 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 that the longest time that the battery 140 can last is about 50 days, then the battery 140 can be replaced every 40 days, and the replaced battery 140 can be charged for the next use.

[0129] The backup power supply start-stop control unit 120 and the cabin vibration detection unit 110 may be integrated on the same hardware, or may be respectively arranged on different hardware.

[0130] The implementation software of the power control method of this embodiment may not be completely placed inside the backup power control device, and the backup power supply and the backup power control device may be packaged together to obtain an integrated backup power supply, and the implementation programs of the first battery life method and the second battery life method may be located in the integrated backup power supply. It should be understood that this is a different implementation of the same method.

[0131] In the present application, when the backup power supply 130 is turned off, the low-power battery 140 provides power for the cabin vibration monitoring unit to realize vibration detection of the wind turbine 150. Among them, the power supply and power consumption of the battery 140 are in the range of 5W to 40W. In the case of vibration of the wind turbine 150, the blade vibration can be "suppressed" by actions such as pitch or yaw of the wind turbine 150, and the power consumed by this action is in the range of 10kw to 200kW. Only after the high-power backup power supply 130 is started can it provide the wind turbine 150 with sufficient power to perform the action. In other words, the battery 140 is a low-power and low-capacity energy storage device that can support the vibration detection of the cabin vibration monitoring unit, but is not enough to supply the wind turbine 150 for operation. The backup power supply 130 is a high-power and high-capacity device that usually remains silent and only provides the necessary power for the wind turbine 150 to "suppress blade vibration" when the wind turbine 150 vibrates. Therefore, the present application can save the electric energy of the backup power supply 130, ensure that the backup power supply 130 provides the wind turbine 150 with electric energy to suppress vibration when the wind turbine 150 vibrates abnormally, and has good economic efficiency. Therefore, the present application can effectively solve the problems in the prior art that the wind turbine 150 obtains high-power power supply for a short duration and poor economic efficiency after the installation is completed and before the grid is connected.

[0132] Fig. 9 A schematic diagram of the structure of the power control software system of the embodiment of the present application is shown. Exemplarily, the power control software system includes: a vibration state detection module 910, a start-stop control module 920 and a vibration suppression result determination module 930.

[0133] The vibration state detection module 910 is used to obtain a first vibration signal obtained by the nacelle vibration detection unit 110 by monitoring the vibration condition of the wind turbine nacelle, and determine the vibration state of the blades on the wind turbine 150 according to the first vibration signal.

[0134] The start-stop control module 920 is used to send a start command to the backup power supply 130 when the vibration state is abnormal vibration; and perform a vibration suppression action after the wind turbine 150 is powered by the backup power supply 130. That is, the start command is used to drive the backup power supply 130 to start and provide electric energy to the wind turbine 150 to wake up the wind turbine 150, and the wind turbine 150 performs a vibration suppression action after being powered; the vibration suppression action includes adjusting the cabin wind direction angle or blade angle action.

[0135] The vibration suppression result determination module 930 is used to obtain comprehensive vibration information and determine the vibration suppression result of the wind turbine 150 according to the comprehensive vibration information. The comprehensive vibration information includes the first vibration signal.

[0136] The start-stop control module 920 is also used to send a shutdown command to the backup power supply 130 when the vibration suppression result is vibration suppression completion; the shutdown command is used to drive the backup power supply 130 to shut down to stop providing power to the wind turbine 150.

[0137] It can be understood that the software system of this embodiment corresponds to the power control method of the above embodiment, and the options in the above embodiment are also applicable to this embodiment, so they will not be described repeatedly here.

[0138] 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.

[0139] Among them, the processor can be an integrated circuit chip with signal processing capabilities. The processor can be a general-purpose processor, including a central processing unit (CPU), a graphics processing unit (GPU) and 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 gates or transistor logic devices, discrete hardware components. At least one of the general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc., which can implement or execute the disclosed methods, steps and logic block diagrams in the embodiments of the present application.

[0140] The memory may be, but is not limited to, a random access memory (RAM), a read only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), etc. The memory is used to store a computer program, and the processor may execute the computer program accordingly after receiving an execution instruction.

[0141] The present application also provides a readable storage medium for storing the computer program used in the above-mentioned terminal device.

[0142] In several embodiments provided in the present 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 architecture, functions and operations of the devices, methods and computer program products according to 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 a code, and the module, a program segment or a part of a code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in an alternative implementation, the functions marked in the box can also occur in a different order from the order 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 the flow diagram, and the combination of boxes in the structure diagram and / or the flow diagram, can be implemented with a dedicated hardware-based system that performs a specified function or action, or can be implemented with a combination of dedicated hardware and computer instructions.

[0143] In addition, the functional modules or units in the various embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.

[0144] If the function is implemented in the form of a software function module and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art, and the computer software product is stored in a storage medium, including several instructions for a computer device (which can be a smart phone, a personal computer, a server, or a network device, etc.) to perform 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.

[0145] The above description is only a specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope 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-stop control unit is further used to obtain comprehensive vibration information, 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 the vibration suppression is completed, so as to drive the backup power supply to shut down; the comprehensive vibration information includes the first vibration signal; The device also includes 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 a first battery endurance method; the first battery endurance method includes: according to the battery endurance, setting the backup power supply to automatically start according to a predetermined time interval, and setting the running time of the backup power supply after starting, so that the backup power supply regularly charges the battery; 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 the built-in vibration suppression action strategy of the wind turbine; the vibration suppression action includes adjusting the blade pitch angle or the cabin wind direction angle; the backup power supply start-stop control unit is also used to communicate with the wind turbine; the comprehensive vibration information includes a 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: obtain the first vibration signal obtained by monitoring the cabin vibration from the cabin vibration detection unit; obtain the second vibration signal and / or the status information from the wind turbine; determining the vibration suppression result according to the first vibration signal, the second vibration signal and the state information; 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.

2. The backup power supply control device according to claim 1, 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.

3. The backup power supply control device according to claim 2, 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.

4. The backup power supply control device according to claim 3, 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.

5. 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 4; 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.

6. 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 5; the power supply system is used to supply power to the wind turbine.

7. A power supply control method, the method being applicable to the backup power supply control device according to any one of claims 1 to 4, 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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