Wind turbine yaw system fault reset method, device, equipment and medium

Abstract

The application provides a wind turbine yaw system fault reset method, device, equipment and medium, comprising: S1, obtaining feedback information of the yaw system; S2, judging whether there is a yaw fault, yes, entering step S3; S3, applying a pulse signal to the yaw relay to attempt to reset the yaw relay, and adding 1 to the attempt count; S4, judging whether the attempt count reaches a preset value, yes, entering step S5, otherwise, returning to step S1; S5, sending an emergency stop command to the yaw system. The beneficial effects of the application are that by detecting the working current of the yaw motor and the positive and negative rotation direction feedback of the yaw motor, whether there is a yaw fault is judged, when there is a yaw fault, a pulse signal is applied to the yaw relay to make the yaw relay separate from the bonding state, so as to restore the normal operation of the yaw system. The method does not need to increase additional devices, has low cost, good safety and high practicability.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of wind power equipment detection, in particular to a wind turbine yaw system fault reset method, device, equipment and medium. BACKGROUND

[0002] The yaw system is a part of the wind turbine, which can quickly and smoothly align the wind direction when the wind direction changes in the vector direction, so that the wind wheel can obtain the maximum wind energy.

[0003] In the prior art, a small current signal from the main controller is used to control the large current of the yaw motor to control the enable of yaw, as long as the design is reasonable and the redundancy is sufficient, such yaw system can save the manufacturing cost of wind turbine, effectively reduce the operation and maintenance cost of yaw system, and has certain competitive advantage.

[0004] However, as the operation time of the unit increases, the yaw system bears the heavy task of frequent yawing, and the relay is prone to fatigue failure. The main manifestations of the failed relay are inaction, slow action, electric shock, coil and drive body damage, which can easily cause yaw motor burnout, drive spring shedding, drive small gear ring, and yaw large gear ring outer tooth fracture. In severe cases, it can even cause blade damage and tower collapse accidents. SUMMARY

[0005] The technical problem to be solved by the present application is to provide a wind turbine yaw system fault reset method, device, equipment and medium which can attempt to restore the yaw system by changing the control strategy of the yaw relay when the yaw system fails to act or misacts.

[0006] To solve the above technical problems, the technical scheme adopted by the present application is as follows: a wind turbine yaw system fault reset method, comprising:

[0007] S1, obtaining feedback information of the yaw system;

[0008] S2, determining whether there is a yaw fault, if yes, entering step S3;

[0009] S3, applying a pulse signal to the yaw relay to attempt to reset the yaw relay, and counting 1 for the attempt;

[0010] S4, determining whether the attempt count reaches a preset value, if yes, entering step S5, otherwise returning to step S1;

[0011] S5, sending an emergency stop command to the yaw system.

[0012] Further, in step S3, further comprising:

[0013] S301, add the yaw relay to a periodic detection list;

[0014] S302, judge whether a preset periodic detection time is reached, yes, enter step S303;

[0015] S303, apply a forced pulse signal to the yaw relay, and add 1 to a forced count;

[0016] S304, judge whether the forced count reaches a preset value, yes, return to S302, otherwise, return to S303.

[0017] Further, in step S3, further comprising:

[0018] S311, add the yaw relay to a periodic verification list;

[0019] S312, judge whether a preset yaw relay verification time is reached, yes, enter step S313;

[0020] S313, apply a switching signal to the yaw relay, and acquire a switching response time of the yaw relay;

[0021] S314, judge whether the switching response time is within a preset time range, yes, return to S312.

[0022] Further, after step S5, further comprising sending related alarm information to inform maintenance personnel to timely perform maintenance.

[0023] Further, the feedback information comprises a rotating direction of the yaw motor and a working current of the yaw motor.

[0024] The application also relates to a wind turbine yaw system fault reset device, comprising an acquisition module, a judgment module, an execution module and a counting module;

[0025] The acquisition module is used for acquiring feedback information of the yaw system;

[0026] The judgment module is used for judging whether a yaw fault exists and whether a preset value of a trial count is reached;

[0027] The execution module is used for sending an emergency shutdown instruction to the yaw system;

[0028] The counting module is used for adding 1 to the trial count.

[0029] Further, further comprising an adding module, which is used for adding the yaw relay to a periodic detection list and adding the yaw relay to a periodic verification list;

[0030] The judging module is further configured to judge whether a preset periodic detection time is reached, judge whether a preset value of forced counting is reached, judge whether a preset yaw relay verification time is reached, and judge whether a switching response time is within a preset time range.

[0031] The executing module is further configured to apply a forced pulse signal to the yaw relay and apply a switching signal to the yaw relay.

[0032] The counting module is further configured to increase the forced counting by 1.

[0033] Further, an alarm module is further included, which is configured to send relevant alarm information to notify maintenance personnel to timely perform maintenance.

[0034] The present application also relates to a computer device, which comprises a memory and a processor.

[0035] The memory is configured to store a computer program.

[0036] The processor is configured to execute the computer program and implement the wind turbine yaw system fault reset method according to any one of the above.

[0037] The present application also relates to a computer readable storage medium, which stores a computer program, and the computer program is executed by a processor to make the processor implement the wind turbine yaw system fault reset method according to any one of the above.

[0038] The present application has the advantages that: by detecting the working current of the yaw motor and the forward and reverse rotation direction feedback of the yaw motor, if there is a yaw fault, a pulse signal is applied to the yaw relay to make the yaw relay get rid of the sticking state, so as to restore the normal operation of the yaw system, the method does not need to increase additional devices, has low cost, good safety, and high practicability. BRIEF DESCRIPTION OF DRAWINGS

[0039] The specific process of the present application will be described in detail below with reference to the drawings:

[0040] Figure 1 A schematic flowchart of a wind turbine yaw system fault reset method provided by the embodiment of the present application is shown in the figure;

[0041] Figure 2 A schematic flowchart of a sub-step of detecting the yaw relay provided by the embodiment of the present application is shown in the figure;

[0042] Figure 3 A schematic flowchart of a sub-step of verifying the yaw relay provided by the embodiment of the present application is shown in the figure;

[0043] Figure 4 A schematic block diagram of a wind turbine yaw system fault reset device is provided for an embodiment of the present application.

[0044] Figure 5 A structural schematic block diagram of a computer device is provided for an embodiment of the present application. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0046] In the description of the present application, it should be understood that the terms “center”, “longitudinal”, “transverse”, “length”, “width”, “thickness”, “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer”, “clockwise”, “counterclockwise” and the like indicate the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0047] In addition, the terms “first” and “second” are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with “first” and “second” can explicitly or implicitly include one or more features. In the description of the present application, the meaning of “a plurality of” is two or more, unless otherwise specifically limited.

[0048] In the present application, unless otherwise specifically defined and limited, the terms “mounting”, “connection”, “connection”, “fixing” and the like should be understood broadly, for example, it can be connected, or detachable, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0049] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can include that the first and second features are in direct contact, or can include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature is "on", "above" and "over" the second feature includes that the first feature is directly above and obliquely above the second feature, or only means that the first feature is higher in horizontal height than the second feature. The first feature is "under", "below" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or only means that the first feature is lower in horizontal height than the second feature.

[0050] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate different embodiments or examples described in the present specification.

[0051] Embodiment 1

[0052] Please refer to Figures 1 to 3 The present embodiment provides a yaw system fault reset method of a wind turbine generator, comprising:

[0053] S1, obtaining feedback information of the yaw system;

[0054] Starting the yaw system according to the wind demand, obtaining the feedback information of the yaw system, the feedback information of the yaw system including the rotation direction of the yaw motor and the working current of the yaw motor.

[0055] S2, judging whether there is a yaw fault, if yes, entering step S3;

[0056] Whether the yaw relay is faulty can be judged by the rotation direction of the yaw motor in combination with the working current of the yaw motor.

[0057] The rotation direction of the yaw motor can judge the forward rotation or reverse rotation of the yaw motor through the feedback of the yaw counting sensor; can also judge whether the yaw motor responds to the yaw action through the feedback of the yaw motor revolution sensor; can also judge whether the yaw motor responds to the yaw action through the increase or decrease of the wind turbine cable twisting angle.

[0058] Yaw relay refers to the relay for controlling the clockwise rotation (forward rotation) of a wind turbine or the counterclockwise rotation (reverse rotation) of the wind turbine. The forward and reverse rotation of the motor is mainly achieved by controlling a contactor with interlocking to realize left and right yaw (motor forward and reverse rotation). The principle of forward and reverse rotation of the motor is to change the phase sequence of the motor power supply (any exchange of two power supply cables can realize the switching of forward and reverse rotation). Generally, the main controller sends a yaw instruction, the yaw relay is energized, the left combination makes the clockwise rotation contactor act, and the motor drives the wind turbine to rotate clockwise (forward rotation), and the right combination makes the counterclockwise rotation contactor act, and the motor drives the wind turbine to rotate counterclockwise (reverse rotation).

[0059] When the yaw system is started to implement yaw action, it is found that the actual yaw action does not conform to the yaw instruction, including that the yaw motor does not act when the yaw system is started, or the yaw is in the opposite direction, etc. It can be judged that there is a yaw fault.

[0060] S3, a pulse signal is applied to the yaw relay to attempt to reset the yaw relay, and the attempt count is increased by 1;

[0061] After confirming that the possibility of yaw relay failure is high, a pulse signal is applied to the yaw relay to attempt to remove the bonded and welded relay contacts. The current of the applied pulse signal can generate sufficient magnetic flux in the coil of the yaw relay to generate a biasing force on the contacts through the magnetic flux, and the pulse form of the electrical signal can generate mechanical vibration of the contacts, and the mechanical vibration is used to attempt to remove the bonding and welding between the contacts. After applying the pulse signal to the yaw relay for a period of time, the attempt count is increased by 1, indicating that 1 attempt removal action has been performed.

[0062] The frequency of the pulse signal can be adaptively adjusted and matched according to the specifications of the yaw relay to ensure the best removal effect.

[0063] S4, whether the attempt count reaches a preset value is judged, if yes, step S5 is entered, otherwise, step S1 is returned;

[0064] After completing the application of the pulse signal to the yaw relay to attempt to reset the yaw relay, the attempt count is checked. If the attempt count does not reach the upper limit of the attempt count, the feedback information of the yaw system is continuously obtained, it is judged whether the yaw system returns to normal, if not, the pulse signal is applied to the yaw relay again to attempt to reset the yaw relay, and if the attempt count reaches the upper limit, it is considered that the yaw relay cannot be reset by applying the pulse signal to the yaw relay.

[0065] S5, an emergency stop instruction is sent to the yaw system.

[0066] Generally, the rotation feedback of the yaw motor can probably indicate whether the yaw relay has sticking condition. In combination with the working current of the yaw motor, when the yaw motor has large current, it indicates that the yaw motor is in normal working state, i.e. the yaw motor normally performs yaw action, but the yaw action does not conform to the instruction. At this time, higher-level safety control instructions (such as disconnecting the power supply, disconnecting the fan safety chain, etc.) need to be started to avoid motor burning, drive damage and other faults, so as to achieve the purpose of protecting the yaw system. Sending an emergency stop command to the yaw system can realize the emergency stop of the yaw motor, effectively avoiding more serious faults.

[0067] In an embodiment, the control of the yaw relay is improved to reduce the risk of sticking and welding between contacts. Specifically, in step S3, the following is further included:

[0068] S301, add the yaw relay to the periodic detection list;

[0069] When a yaw fault occurs and the yaw fault is removed by applying a pulse signal to the yaw relay, it indicates that the yaw relay has hidden faults and needs to be periodically detected and maintained.

[0070] S302, determine whether the preset periodic detection time is reached, yes to step S303;

[0071] In order to avoid the sticking and welding of the yaw relay again to cause yaw fault, a pulse signal can be applied to the yaw relay periodically to reduce the risk of sticking and welding between contacts. It should be noted that here periodic means every certain period of time, which can be a fixed time interval, such as a fixed time point every day; or a period of time after executing yaw action, such as after executing yaw action, if more than 1 day without executing yaw action again, it is determined that the periodic detection time is reached, and the yaw relay needs to be detected periodically.

[0072] S303, apply a forced pulse signal to the yaw relay, and add 1 to the forced count;

[0073] When the preset detection time is reached, the system applies a forced pulse signal to the yaw relay. The current of the forced pulse signal can generate sufficient magnetic flux for the coil of the yaw relay to generate a bias force on the contact through the magnetic flux. The pulse form of the electrical signal can generate mechanical vibration of the contact to reduce the risk of sticking and welding between contacts.

[0074] After applying the forced pulse signal to the yaw relay for a period of time, the forced count is added by 1, indicating that the forced disconnection action has been executed 1 time.

[0075] S304, determining whether the forced counting reaches a preset value, yes, returning to S302, otherwise returning to S303.

[0076] For safety, a single periodic detection can perform multiple forced pulse signal applications to ensure that the purpose of reducing the risk of bonding between contacts is achieved. For example, a periodic detection task needs to perform three forced pulse signal application actions, and when the number of executions does not reach three, it returns to S303 for continuous execution and counting. When three forced pulse signal application actions have been performed, the current periodic detection task is ended.

[0077] After completion, wait for the next periodic detection period to come.

[0078] In an embodiment, the control of the yaw relay is improved to reduce the risk of yaw system failure caused by the performance degradation of the yaw relay. Specifically, in step S3, it also includes:

[0079] S311, adding the yaw relay to the periodic verification list;

[0080] When a yaw failure occurs and the yaw failure is resolved by applying a pulse signal to the yaw relay, it indicates that the yaw relay has hidden faults and needs to be periodically verified.

[0081] S312, determining whether the preset yaw relay verification time is reached, yes, entering step S313;

[0082] In order to avoid the performance degradation of the yaw relay leading to yaw failure, the yaw relay can be periodically applied with a switching signal to verify whether the switching response time of the yaw relay meets the requirements.

[0083] S313, applying a switching signal to the yaw relay to obtain a switching response time;

[0084] By applying a switching signal to the yaw relay, the switching response time of the switching signal can be obtained in combination with the duration of the yaw relay switching action.

[0085] S314, determining whether the switching response time is within a preset time range, yes, returning to S312.

[0086] The switching response time is used to determine whether the yaw relay has aging phenomenon.

[0087] After completion, wait for the next periodic detection period to come.

[0088] In an embodiment, the timeliness of troubleshooting is improved to ensure that the fault can be timely reported and eliminated. Specifically, it also includes sending related alarm information to notify maintenance personnel to timely repair.

[0089] After confirming that the fault cannot be ruled out, the yaw fault alarm information is sent to the management platform from the wind turbine end, and the platform manager arranges maintenance personnel on site to troubleshoot and repair the fault through the alarm information. The yaw fault alarm information can include feedback information of the yaw system and attempt count, so as to facilitate the platform manager to judge the fault.

[0090] From the above description, the beneficial effects of the present application are that by detecting the working current of the yaw motor and the forward and reverse direction feedback of the yaw motor, if there is a yaw fault, a pulse signal is applied to the yaw relay to make the yaw relay out of the bonding state, so as to restore the normal operation of the yaw system. This method does not need to increase additional devices, has low cost, good safety and high practicability.

[0091] Please refer to Figure 4 The present application also relates to a wind turbine yaw system fault reset device, comprising an acquisition module, a judgment module, an execution module and a counting module.

[0092] The acquisition module is used to acquire the feedback information of the yaw system.

[0093] The judgment module is used to judge whether there is a yaw fault and whether the attempt count reaches a preset value.

[0094] The execution module is used to send an emergency shutdown instruction to the yaw system.

[0095] The counting module is used to add 1 to the attempt count.

[0096] The wind turbine starts the yaw system for wind direction alignment according to the wind demand, the feedback information of the yaw system is generated during the operation of the yaw system, the acquisition module acquires the feedback information of the yaw system, and the feedback information of the yaw system includes the rotation direction of the yaw motor and the working current of the yaw motor.

[0097] The judgment module can judge whether the yaw relay has a fault by combining the rotation direction of the yaw motor with the working current of the yaw motor.

[0098] The rotation direction of the yaw motor can be judged by the feedback of the yaw counting sensor to judge whether the yaw motor is forward or reverse; the feedback of the yaw motor revolution sensor can also be used to judge whether the yaw motor responds to the yaw action; the increase or decrease of the wind turbine cable twisting angle can also be used to judge whether the yaw motor responds to the yaw action.

[0099] Yaw relay refers to the relay for controlling the clockwise rotation (forward rotation) of a wind turbine or the counterclockwise rotation (reverse rotation) of the wind turbine. The forward and reverse rotation of the motor is mainly achieved by controlling a contactor with interlocking to realize left and right yaw (motor forward and reverse rotation). The principle of forward and reverse rotation of the motor is to change the power supply phase sequence of the motor (arbitrary exchange of two power supply cables can realize the switching of forward and reverse rotation). Generally, the main controller sends a yaw command, the yaw relay is powered and attracted, the left combination makes the clockwise rotation contactor act, and the motor drives the wind turbine to rotate clockwise (forward rotation). The right combination makes the counterclockwise rotation contactor act, and the motor drives the wind turbine to rotate counterclockwise (reverse rotation).

[0100] When starting the yaw system to implement yaw action, it is found that the actual yaw action does not conform to the yaw command, including that the yaw motor does not act when starting the yaw system, or the yaw motor acts in the opposite direction, or the yaw system acts without issuing a yaw command, etc. All of these can be judged as yaw faults.

[0101] After confirming that the yaw relay is more likely to be faulty, the execution module applies a pulse signal to the yaw relay to attempt to remove the bonded and welded relay contacts. The current of the applied pulse signal can generate sufficient magnetic flux in the coil of the yaw relay to generate a biasing force on the contacts through the magnetic flux, and the pulse form of the electrical signal can generate mechanical vibration of the contacts to attempt to remove the bonding and welding between the contacts. After applying the pulse signal to the yaw relay for a period of time, the attempt count is incremented by 1, indicating that the attempt to remove has been performed once.

[0102] The frequency of the pulse signal can be adaptively adjusted and matched according to the specifications of the yaw relay to ensure the best removal effect.

[0103] After completing the application of the pulse signal to the yaw relay to attempt to reset the yaw relay, the related information of the attempt count is obtained. If the upper limit of the number of attempts has not been reached, the feedback information of the yaw system is continuously obtained by the acquisition module, the judgment module judges whether the yaw system has returned to normal through the re-acquired feedback information of the yaw system, and if the yaw system has not returned to normal, the execution module applies the pulse signal to the yaw relay again to attempt to reset the yaw relay. If the upper limit of the number of attempts is reached, it is considered that the yaw relay cannot be reset by applying the pulse signal to the yaw relay.

[0104] Generally, the rotation feedback of the yaw motor can probably indicate whether the yaw relay is stuck, and the working current of the yaw motor can indicate whether the yaw motor is in a normal working state. When the yaw motor has a large current, a higher level of safety control instruction (for example, disconnecting the power supply or the fan safety chain) needs to be started to avoid the yaw motor burning out or the drive being damaged, thereby protecting the yaw system. The yaw system sends an emergency stop command to achieve the emergency stop of the yaw motor, thereby effectively avoiding more serious faults.

[0105] In an embodiment, the system is improved to ensure stable and reliable operation of the system. Specifically, an adding module is added to add the yaw relay to a periodic detection list and add the yaw relay to a periodic verification list.

[0106] The judgment module is further configured to judge whether a preset periodic detection time is reached, judge whether a forced count reaches a preset value, judge whether a preset yaw relay verification time is reached, and judge whether a switching response time is within a preset time range.

[0107] The execution module is further configured to apply a forced pulse signal to the yaw relay and apply a switching signal to the yaw relay.

[0108] The count module is further configured to add 1 to the forced count.

[0109] In the embodiment, when an over-yaw fault occurs and the over-yaw fault is resolved by applying a pulse signal to the yaw relay, it indicates that the yaw relay has a hidden fault and needs to be periodically detected and maintained.

[0110] To avoid the yaw relay from being stuck again and causing a yaw fault, the execution module can periodically apply a pulse signal to the yaw relay to reduce the risk of the contacts being stuck together.

[0111] When the preset detection time is reached, the execution module of the system applies a forced pulse signal to the yaw relay. The current of the forced pulse signal can generate sufficient magnetic flux for the coil of the yaw relay to generate a biasing force on the contacts through the magnetic flux, and the pulse form of the electrical signal can generate mechanical vibration of the contacts to reduce the risk of the contacts being stuck together.

[0112] After the execution module applies the forced pulse signal to the yaw relay for a period of time, the forced count is added by 1, indicating that the forced disconnection action has been performed once.

[0113] For safety, the periodic detection can be performed multiple times to apply the forced pulse signal to ensure that the risk of the contacts being stuck together is reduced.

[0114] After completion, wait for the arrival of the next periodic detection period.

[0115] Similarly, in order to avoid yaw relay performance degradation leading to yaw failure, the yaw relay can be periodically applied with a switching signal to verify whether the yaw relay switching response time meets the requirements.

[0116] By executing the module to apply the switching signal to the yaw relay, in combination with the duration of the yaw relay switching action, the switching response time of the switching signal can be obtained.

[0117] The yaw relay aging phenomenon is determined by the switching response time.

[0118] After completion, wait for the arrival of the next periodic verification period.

[0119] In an embodiment, the detection device is improved to ensure that the fault can be reported and eliminated in time. Specifically, it further includes an alarm module for sending relevant alarm information to notify maintenance personnel to perform maintenance in time.

[0120] After confirming that the fault cannot be eliminated, the wind turbine end sends yaw failure alarm information to the management platform, and the platform manager arranges maintenance personnel to perform fault troubleshooting and maintenance on site through the alarm information. The yaw failure alarm information can include feedback information of the yaw system and attempt count to facilitate the platform manager to analyze and judge the fault.

[0121] The above device can be implemented in the form of a computer program, which can run on a computer device as shown in Figure 5 .

[0122] Please refer to Figure 5 , Figure 5 is a structural schematic block diagram of a computer device provided by the embodiment of the present application.

[0123] Please refer to Figure 5 , the computer device includes a processor and a memory connected through a system bus, wherein the memory can include a non-volatile storage medium and an internal memory.

[0124] The processor is used to provide calculation and control capabilities to support the operation of the entire computer device.

[0125] The internal memory provides an environment for the running of the computer program in the non-volatile storage medium, and the computer program executed by the processor can make the processor execute any one of the wind turbine yaw system fault reset methods.

[0126] It should be appreciated that the processor can be a central processing unit (CPU), the processor can also be other general-purpose processors, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, etc. Among them, the general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc.

[0127] In one embodiment, the processor is configured to run a computer program stored in the memory to implement the following steps:

[0128] S1, obtaining feedback information of the yaw system;

[0129] Starting the yaw system according to the wind demand, obtaining the feedback information of the yaw system, the feedback information of the yaw system including the rotation direction of the yaw motor and the working current of the yaw motor.

[0130] S2, judging whether there is a yaw fault, if yes, entering step S3;

[0131] The rotation direction of the yaw motor combined with the working current of the yaw motor can be used to judge whether the yaw relay is faulty.

[0132] S3, applying a pulse signal to the yaw relay to attempt to reset the yaw relay, and increasing the attempt count by 1;

[0133] After confirming that the yaw relay is highly likely to be faulty, a pulse signal is applied to the yaw relay to attempt to remove the bonded relay contacts. The attempt count is increased by 1, indicating that 1 attempt removal action has been performed.

[0134] S4, judging whether the attempt count reaches a preset value, if yes, entering step S5, otherwise returning to step S1;

[0135] After completing the application of the pulse signal to the yaw relay to attempt to reset the yaw relay, the attempt count is checked. If the attempt count does not reach the upper limit of the attempt number, the feedback information of the yaw system is continuously obtained, and it is judged whether the yaw system returns to normal. If the yaw system does not return to normal, the pulse signal is applied to the yaw relay again to attempt to reset the yaw relay. If the attempt count reaches the upper limit, it is considered that the yaw relay cannot be reset by applying the pulse signal to the yaw relay.

[0136] S5, sending an emergency stop command to the yaw system.

[0137] When the yaw relay is applied with a pulse signal multiple times to attempt to reset the yaw relay, the yaw system still does not return to normal, and the operating current of the yaw motor is large, a higher-level safety control instruction needs to be started to avoid motor burnout, drive damage and other faults, so as to protect the yaw system.

[0138] In an embodiment, in step S3, further comprising:

[0139] S301, adding the yaw relay to a periodic detection list;

[0140] S302, determining whether the preset periodic detection time is reached, yes to step S303;

[0141] S303, applying a forced pulse signal to the yaw relay, and adding 1 to the forced count;

[0142] S304, determining whether the forced count reaches a preset value, yes to S302, otherwise to S303.

[0143] When a yaw fault occurs and is resolved by applying a pulse signal to the yaw relay, it indicates that the yaw relay has hidden faults and needs to be periodically detected and maintained. Specifically, a pulse signal is applied to the yaw relay periodically to reduce the risk of adhesion and welding between contacts. For safety, a single periodic detection can perform multiple forced pulse signals to ensure that the purpose of reducing the risk of adhesion and welding between contacts is achieved.

[0144] In an embodiment, in step S3, further comprising:

[0145] S311, adding the yaw relay to a periodic verification list;

[0146] S312, determining whether the preset yaw relay verification time is reached, yes to step S313;

[0147] S313, applying a switching signal to the yaw relay to obtain a switching response time of the yaw relay;

[0148] S314, determining whether the switching response time is within a preset time range, yes to S312.

[0149] When the yawing fault occurs and the yawing fault is removed by applying the pulse signal to the yaw relay, it indicates that the yaw relay has hidden faults and needs to be detected regularly. Specifically, the switching signal is applied to the yaw relay regularly to verify whether the switching response time of the yaw relay meets the requirements. The switching response time of the switching signal can be obtained by applying the switching signal to the yaw relay in combination with the time length of the switching action of the yaw relay. The aging phenomenon of the yaw relay is determined by the switching response time.

[0150] In one embodiment, after step S5, it further includes sending relevant alarm information to inform the maintenance personnel to perform maintenance in time.

[0151] After confirming that the fault cannot be eliminated, the wind turbine end sends yawing fault alarm information to the management platform, and the platform manager arranges maintenance personnel to perform fault troubleshooting and maintenance on site through the alarm information. The yawing fault alarm information can include feedback information of the yawing system and attempt count to facilitate the platform manager to analyze and judge the fault.

[0152] In one embodiment, the feedback information includes the rotation direction of the yaw motor and the working current of the yaw motor.

[0153] Generally, the rotation feedback of the yaw motor can indicate whether the yaw relay has sticking condition with high probability. In combination with the working current of the yaw motor, it is indicated that the yaw motor is in normal working state in the case of large current of the yaw motor, and higher-level safety control instructions (such as measures of disconnecting power supply and disconnecting safety chain of the wind turbine) need to be started to avoid faults such as motor burning and drive damage, so as to achieve the purpose of protecting the yawing system.

[0154] The embodiment of the application also provides a computer readable storage medium, which stores a computer program, the computer program includes program instructions, and the processor executes the program instructions to implement any one of the yawing system fault reset methods of the wind turbine provided by the embodiments of the application.

[0155] For example, the program is loaded by the processor and the following steps can be executed:

[0156] S1, obtaining feedback information of a yawing system;

[0157] S2, judging whether there is a yawing fault, and if yes, entering step S3;

[0158] S3, applying a pulse signal to a yaw relay to attempt to reset the yaw relay, and adding 1 to an attempt count;

[0159] S4, judging whether the attempt count reaches a preset value, and if yes, entering step S5, otherwise returning to step S1;

[0160] S5, sending an emergency stop command to the yaw system.

[0161] The computer readable storage medium can be an internal storage unit of the computer device, for example, a hard disk or a memory of the computer device. The computer readable storage medium can also be an external storage device of the computer device, for example, a plug-in hard disk, a smart media card (SMC), a secure digital card (SD Card), a flash card, etc.

[0162] Further, the computer readable storage medium can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system, at least one application required by a function, etc., and the data storage area can store data created according to the use of the blockchain node, etc.

[0163] It is easy for those skilled in the art to understand that the above-mentioned embodiments can be freely combined and superimposed without conflict.

[0164] The above is only an embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation, or direct or indirect application in other related technical fields, which is based on the content of the specification and drawings, is also included in the patent protection scope of the present application.

Claims

1. A method for resetting a fault in the yaw system of a wind turbine, comprising: S1. Obtain feedback information from the yaw system; S2. Determine if there is a yaw fault. If yes, proceed to step S3. S3. Apply a pulse signal to the yaw relay to attempt to disconnect and reset the yaw relay, and increment the attempt count by 1. S4. Determine whether the attempt count has reached the preset value. If yes, proceed to step S5; otherwise, return to step S1. S5. Send an emergency stop command to the yaw system; Step S3 further includes: S301. Add the yaw relay to the periodic inspection list; S302. Determine whether the preset periodic inspection time has been reached. If yes, proceed to step S303. S303. Apply a forced pulse signal to the yaw relay to increment the forced counter by 1. S304. Determine whether the forced count has reached the preset value. If yes, return to S302; otherwise, return to S303. Step S3 further includes: S311. Add the yaw relay to the periodic verification list; S312. Determine whether the preset yaw relay verification time has been reached. If yes, proceed to step S313. S313. Apply a switching signal to the yaw relay and obtain the switching response time of the yaw relay; S314. Determine whether the switching response time is within the preset time range. If yes, return to S312.

2. The method according to claim 1, characterized in that: After step S5, relevant alarm information is also sent to notify maintenance personnel to carry out maintenance in a timely manner.

3. The method according to claim 1, characterized in that: The feedback information includes the rotation direction of the yaw motor and the operating current of the yaw motor.

4. A fault reset device for a wind turbine yaw system, characterized in that: It includes an acquisition module, a judgment module, an execution module, a counting module, and an addition module; The acquisition module is used to acquire feedback information from the yaw system; The judgment module is used to determine whether there is a yaw fault and whether the attempt count has reached a preset value. Determine whether the preset periodic detection time has been reached, whether the forced count has reached the preset value, whether the preset yaw relay verification time has been reached, and whether the switching response time is within the preset time range; The adding module is used to add yaw relays to the periodic inspection list and to the periodic verification list; The execution module is used to send an emergency stop command to the yaw system; apply a forced pulse signal to the yaw relay; and apply a switching signal to the yaw relay. The counting module is used to increment the attempt count by 1 and the forced count by 1.

5. The apparatus according to claim 4, characterized in that: It also includes an alarm module, which is used to send relevant alarm information to notify maintenance personnel to carry out maintenance in a timely manner.

6. A computer device, characterized in that, The computer device includes a memory and a processor; the memory is used to store computer programs. The processor is configured to execute the computer program and, in executing the computer program, implement the wind turbine yaw system fault reset method as described in any one of claims 1 to 3.

7. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, causes the processor to implement the wind turbine yaw system fault reset method as described in any one of claims 1 to 3.

Images