Fault resetting method, device and equipment for yaw system of wind turbine generator and medium

Abstract

The invention provides a wind turbine generator yaw system fault reset method and device, equipment and a medium. The method comprises the steps that S1, feedback information of a yaw system is obtained; s2, whether a yaw fault exists or not is judged, and if yes, the step S3 is executed; s3, applying a pulse signal to the yaw relay to try to break and reset the yaw relay, and adding 1 to an attempted count; s4, judging whether the trial counting reaches a preset value or not, if so, entering the step S5, and otherwise, returning to the step S1; and S5, an emergency shutdown instruction is sent to the yaw system. The yaw control method has the beneficial effects that if the yaw fault exists is judged by detecting the working current of the yaw motor and feeding back the positive and negative rotation directions of the yaw motor, and if the yaw fault exists, the pulse signal is applied to the yaw relay to enable the yaw relay to be separated from the bonding state, so that normal operation of the yaw system is recovered; according to the method, additional devices are not needed, the cost is low, the safety is good, and the practicability is high.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power equipment detection, and in particular to a method, device, equipment and medium for resetting a yaw system fault of a wind turbine generator set. Background Art

[0002] The yaw system is a part of the wind turbine generator set. Its function is to quickly and smoothly align the wind direction when the wind changes in vector direction so that the wind rotor can obtain maximum wind energy.

[0003] In the prior art, a relay is used to control the yaw enable by converting a small current signal from a main controller into a large current to control the normal operation of the yaw motor. As long as the design is reasonable and the redundancy is sufficient, this type of yaw system can save the manufacturing cost of the wind turbine and effectively reduce the operating and maintenance cost of the yaw system, and has certain competitive advantages.

[0004] However, as the unit's operating years increase, the yaw system bears the heavy task of frequent yaw against the wind, and the relay is very prone to fatigue failure. The failed relays mainly manifest themselves in non-action, slow action, electric shock, and damage to the coil and drive body, which can easily cause the yaw motor to burn out, the driver retaining spring to fall off, and the outer teeth of the drive small gear ring and the yaw large gear ring to break. In severe cases, it may even cause blade damage and tower collapse accidents. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a method, device, equipment and medium for resetting a yaw system of a wind turbine, which can attempt to restore the yaw system by changing the control strategy of the yaw relay when the yaw system fails to operate or malfunctions.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: a method for resetting a yaw system fault of a wind turbine generator set, comprising:

[0007] S1. Obtain feedback information from the yaw system;

[0008] S2, determine whether there is a yaw fault, if yes, proceed to step S3;

[0009] S3, applying a pulse signal to the yaw relay to try to disconnect and reset the yaw relay, and adding 1 to the attempt count;

[0010] S4, determine whether the attempt count reaches a preset value, if yes, go to step S5, otherwise go back to step S1;

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

[0012] Furthermore, in step S3, it also includes:

[0013] S301, adding the yaw relay to the regular inspection list;

[0014] S302, determine whether the preset regular detection time has been reached, if yes, proceed to step S303;

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

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

[0017] Furthermore, in step S3, it also includes:

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

[0019] S312, determining whether the preset yaw relay verification time has been reached, if yes, proceeding to step S313;

[0020] S313, applying a switching signal to the yaw relay to obtain a switching response time of the yaw relay;

[0021] S314: Determine whether the switching response time is within a preset time range, and if so, return to S312.

[0022] Furthermore, after step S5, it also includes sending relevant alarm information to notify maintenance personnel to perform maintenance in time.

[0023] Furthermore, the feedback information includes the rotation direction of the yaw motor and the operating current of the yaw motor.

[0024] The present invention 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 to obtain feedback information of the yaw system;

[0026] The judgment module is used to judge whether there is a yaw fault and whether the attempt count reaches a preset value;

[0027] The execution module is used to send an emergency stop command to the yaw system;

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

[0029] Further, it also includes an adding module, the adding module is used to add the yaw relay to the regular inspection list and add the yaw relay to the regular verification list;

[0030] The judgment module is also used to judge whether the preset periodic detection time has been reached, whether the forced count has reached a preset value, whether the preset yaw relay verification time has been reached, and whether the switching response time is within a preset time range;

[0031] The execution module is also used to apply a forced pulse signal to the yaw relay and a switching signal to the yaw relay;

[0032] The counting module is further configured to add 1 to the forced count.

[0033] Furthermore, it also includes an alarm module, which is used to send relevant alarm information to notify maintenance personnel to perform maintenance in time.

[0034] The present invention also relates to a computer device, the computer device comprising a memory and a processor;

[0035] The memory is used to store computer programs;

[0036] The processor is used to execute the computer program and implement any one of the above-mentioned methods for resetting a yaw system fault of a wind turbine when executing the computer program.

[0037] The present invention also relates to a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the processor implements the method for resetting a yaw system fault of a wind turbine as described in any one of the above items.

[0038] The beneficial effect of the present invention is that by detecting the working current of the yaw motor and the forward and reverse direction feedback of the yaw motor, it is determined if a yaw fault exists. When a yaw fault exists, a pulse signal is applied to the yaw relay to release the yaw relay from the bonding state to restore the normal operation of the yaw system. This method does not require the addition of additional components, has low cost, good safety, and high practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The specific process of the present invention is described in detail below with reference to the accompanying drawings:

[0040] Figure 1 A schematic flow chart of a method for resetting a yaw system fault of a wind turbine provided by an embodiment of the present invention;

[0041] Figure 2 A schematic flow chart of sub-steps for detecting a yaw relay provided in an embodiment of the present invention;

[0042] Figure 3 A schematic flow chart of sub-steps for verifying a yaw relay provided by an embodiment of the present invention;

[0043] Figure 4 A schematic block diagram of a wind turbine yaw system fault reset device provided by an embodiment of the present invention;

[0044] Figure 5 A schematic block diagram of the structure of a computer device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0047] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0048] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be connected, detachably connected, or integrated; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0050] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation 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 may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0051] Example 1

[0052] See also Figures 1 to 3 This embodiment provides a method for resetting a yaw system fault of a wind turbine generator set, comprising:

[0053] S1. Obtain feedback information from the yaw system;

[0054] The yaw system is started according to the wind demand, and feedback information of the yaw system is obtained. The feedback information of the yaw system includes the rotation direction of the yaw motor and the working current of the yaw motor.

[0055] S2, determine whether there is a yaw fault, if yes, proceed to step S3;

[0056] Whether the yaw relay is faulty can be determined by the rotation direction of the yaw motor and the operating current of the yaw motor.

[0057] The rotation direction of the yaw motor can be determined by the feedback from the yaw counting sensor to determine whether the yaw motor is rotating forward or reverse. The feedback from the yaw motor speed sensor can also be used to determine whether the yaw motor responds to the yaw action. The increase or decrease in the twist cable angle of the wind turbine can also be used to determine whether the yaw motor responds to the yaw action.

[0058] The yaw relay is a relay that controls the clockwise rotation (forward rotation) or counterclockwise rotation (reverse rotation) of the wind turbine. The control of the motor forward and reverse rotation is mainly achieved by controlling an interlocking contactor to achieve left and right yaw (forward and reverse rotation of the motor). The principle of motor forward and reverse rotation is to change the phase sequence of the motor power supply (any exchange of two power supply cables can achieve forward and reverse switching). It is generally designed that the main controller sends a yaw command, and the yaw relay is energized and energized. The left closure activates the clockwise rotation contactor, allowing the motor to drive the wind turbine to rotate clockwise (forward rotation), and the right closure activates the counterclockwise rotation contactor, allowing the motor to drive the wind turbine to rotate counterclockwise (reverse rotation).

[0059] When the yaw system is started to implement the yaw action, it is found that the actual yaw action does not match the yaw command, including when the yaw system is started, the yaw motor does not work, or yaws in the opposite direction, etc., it can be determined that there is a yaw fault.

[0060] S3, applying a pulse signal to the yaw relay to try to reset the yaw relay, and adding 1 to the attempt count;

[0061] After confirming that the possibility of the yaw relay failure is high, a pulse signal is applied to the yaw relay to try to release the bonded relay contacts. The current of the applied pulse signal can make the coil of the yaw relay generate sufficient magnetic flux to generate a bias force on the contacts through the magnetic flux, and the pulse-shaped electrical signal can make the contacts vibrate mechanically, and try to release the bond between the contacts through mechanical vibration. After the pulse signal is applied to the yaw relay for a period of time, the attempt count is increased by 1, indicating that 1 attempt to release the 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 release effect.

[0063] S4, determine whether the attempt count reaches a preset value, if yes, go to step S5, otherwise go back to step S1;

[0064] After completing one attempt to reset the yaw relay by applying a pulse signal to the yaw relay, check the attempt count. If the upper limit of the attempts has not been reached, continue to obtain feedback information from the yaw system to determine whether the yaw system has returned to normal. If it has not returned to normal, apply a pulse signal to the yaw relay again to try to reset the yaw relay. If the upper limit of the attempts has been reached, it is considered that the yaw relay cannot be reset by applying a pulse signal to the yaw relay.

[0065] S5. Send an emergency stop command to the yaw system.

[0066] Normally, the rotation feedback of the yaw motor can indicate with a high probability whether the yaw relay is sticking. Combined with the working current of the yaw motor, when there is a large current in the yaw motor, it means that the yaw motor is in normal working condition, that is, the yaw motor performs the yaw action normally, but the yaw action does not match the command. At this time, it is necessary to start a more advanced safety control command (such as disconnecting the power supply, disconnecting the fan safety chain, etc.) to avoid motor burnout, drive damage and other faults, so as to protect the yaw system. Sending an emergency stop command to the yaw system can achieve emergency shutdown of the yaw motor, effectively avoiding more serious faults.

[0067] In one embodiment, the control of the yaw relay is improved to reduce the risk of adhesion and welding between contacts. Specifically, step S3 further includes:

[0068] S301, adding the yaw relay to the regular inspection list;

[0069] When a yaw fault occurs and is resolved by applying a pulse signal to the yaw relay, it indicates that the yaw relay has a potential fault and requires regular inspection and maintenance.

[0070] S302, determine whether the preset regular detection time has been reached, if yes, proceed to step S303;

[0071] In order to avoid the yaw relay from sticking and welding again and causing yaw failure, a pulse signal can be periodically applied to the yaw relay to reduce the risk of sticking and welding between the contacts. It should be noted that "regularly" here means at regular intervals, which can be a fixed time interval, such as a fixed time every day; it can also be a period of time after the yaw action is completed. For example, after the yaw action is completed, if no yaw action is performed for more than 1 day, it is judged that the regular inspection time has arrived, and the yaw relay needs to perform regular inspection tasks.

[0072] S303, applying a forced pulse signal to the yaw relay, and adding 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 applied forced pulse signal can make the coil of the yaw relay generate sufficient magnetic flux to generate an offset force on the contacts through the magnetic flux, and the pulse-shaped electrical signal can cause the contacts to produce mechanical vibrations to reduce the risk of bonding and welding between the contacts.

[0074] After the forced pulse signal is applied to the yaw relay for a period of time, the forced count is increased by 1, indicating that one forced disconnection and closing action has been performed.

[0075] S304, determine whether the forced count reaches a preset value, if yes, return to S302, otherwise return to S303.

[0076] For the sake of safety, a single periodic inspection may execute multiple times of applying a forced pulse signal to ensure that the risk of bonding and welding between contacts is reduced. For example, a periodic inspection task needs to execute the action of applying a forced pulse signal three times. If the number of executions does not reach three times, it returns to S303 to continue execution and counting. When the action of applying a forced pulse signal has been executed three times, the current periodic inspection task is terminated.

[0077] After completion, wait for the next regular detection cycle to arrive.

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

[0079] S311, add the yaw relay to the regular verification list;

[0080] When a yaw fault has occurred and the yaw fault is resolved by applying a pulse signal to the yaw relay, it means that the yaw relay has a potential fault and needs to be verified regularly.

[0081] S312, determining whether the preset yaw relay verification time has been reached, if yes, proceeding to step S313;

[0082] In order to avoid yaw failure caused by performance degradation of the yaw relay, a switching signal may be periodically applied to the yaw relay 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 and combining the duration of the yaw relay switching action, the switching response time of the switching signal can be obtained.

[0085] S314: Determine whether the switching response time is within a preset time range, and if so, return to S312.

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

[0087] After completion, wait for the next regular detection cycle to arrive.

[0088] In one implementation, the timeliness of troubleshooting is improved to ensure that the fault can be reported and eliminated in time. Specifically, it also includes sending relevant alarm information to notify maintenance personnel to perform maintenance in time.

[0089] After confirming that a fault that cannot be eliminated has occurred, the wind turbine unit sends a yaw fault alarm message to the management platform. The platform manager arranges maintenance personnel to conduct on-site troubleshooting and repair based on the alarm message. The yaw fault alarm message may include feedback information from the yaw system and the attempt count to facilitate the platform manager to analyze and judge the fault.

[0090] From the above description, it can be seen that the beneficial effects of the present invention are: by detecting the working current of the yaw motor and the forward and reverse direction feedback of the yaw motor, it is determined if a yaw fault exists. When a yaw fault exists, a pulse signal is applied to the yaw relay to allow the yaw relay to be released from the bonding state, so as to restore the normal operation of the yaw system. This method does not require the addition of additional devices, has low cost, good safety, and high practicality.

[0091] See also Figure 4 , the present invention also relates to a fault resetting device for a yaw system of a wind turbine generator set, comprising an acquisition module, a judgment module, an execution module and a counting module;

[0092] The acquisition module is used to obtain 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 stop command to the yaw system;

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

[0096] The wind turbine starts the yaw system to align the wind direction according to the wind demand. The yaw system generates feedback information during operation. The acquisition module obtains the feedback information of the yaw system. 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 fails 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 determined by the feedback from the yaw counting sensor to determine whether the yaw motor is rotating forward or reverse. The feedback from the yaw motor speed sensor can also be used to determine whether the yaw motor responds to the yaw action. The increase or decrease in the twist cable angle of the wind turbine can also be used to determine whether the yaw motor responds to the yaw action.

[0099] The yaw relay is a relay that controls the clockwise rotation (forward rotation) or counterclockwise rotation (reverse rotation) of the wind turbine. The control of the motor forward and reverse rotation is mainly achieved by controlling an interlocking contactor to achieve left and right yaw (forward and reverse rotation of the motor). The principle of motor forward and reverse rotation is to change the phase sequence of the motor power supply (any exchange of two power supply cables can achieve forward and reverse switching). It is generally designed that the main controller sends a yaw command, and the yaw relay is energized and energized. The left closure activates the clockwise rotation contactor, allowing the motor to drive the wind turbine to rotate clockwise (forward rotation), and the right closure activates the counterclockwise rotation contactor, allowing the motor to drive the wind turbine to rotate counterclockwise (reverse rotation).

[0100] When the yaw system is started to perform the yaw action, it is found that the actual yaw action does not match the yaw command, including when the yaw system is started, the yaw motor does not work, or yaws in the opposite direction, or no yaw command is issued, but the yaw system has a yaw action, etc., which can be judged as a yaw fault.

[0101] After confirming that the possibility of the yaw relay failure is high, the execution module applies a pulse signal to the yaw relay to try to release the bonded and welded relay contacts. The current of the applied pulse signal can make the coil of the yaw relay generate sufficient magnetic flux to generate a bias force on the contacts through the magnetic flux, and the pulse-shaped electrical signal can make the contacts vibrate mechanically, and try to release the bonded and welded contacts through mechanical vibration. After the pulse signal is applied to the yaw relay for a period of time, the attempt count is increased by 1, indicating that one attempt to release the action has been performed.

[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 release effect.

[0103] After completing one pulse signal application to the yaw relay in an attempt to reset the yaw relay, relevant information of the attempt count is obtained. If the upper limit of the number of attempts is not reached, the feedback information of the yaw system continues to be obtained through the acquisition module. The judgment module determines whether the yaw system has returned to normal through the re-acquired feedback information of the yaw system. If it still has not returned to normal, the execution module applies a pulse signal to the yaw relay again to try 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 a pulse signal to the yaw relay.

[0104] Normally, the rotation feedback of the yaw motor can indicate with a high probability whether the yaw relay is sticking. Combined with the working current of the yaw motor, when there is a large current in the yaw motor, it means that the yaw motor is in normal working condition. At this time, it is necessary to start more advanced safety control instructions (such as disconnecting the power supply, disconnecting the fan safety chain, etc.) to avoid yaw motor burning, drive damage and other faults, so as to protect the yaw system. Sending an emergency stop command to the yaw system can achieve emergency shutdown of the yaw motor, thereby effectively avoiding more serious faults.

[0105] In one embodiment, the system is improved to ensure stable and reliable operation of the system. Specifically, it also includes an adding module, which is used to add the yaw relay to the regular inspection list and the yaw relay to the regular verification list;

[0106] The judgment module is also used to judge whether the preset periodic detection time has been reached, whether the forced count has reached a preset value, whether the preset yaw relay verification time has been reached, and whether the switching response time is within a preset time range;

[0107] The execution module is also used to apply a forced pulse signal to the yaw relay and a switching signal to the yaw relay;

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

[0109] In this embodiment, when a yaw fault occurs and the yaw fault is resolved by applying a pulse signal to the yaw relay, it means that the yaw relay has a potential fault and needs to be regularly inspected and maintained.

[0110] In order to prevent the yaw relay from being stuck and welded again, which may cause a yaw failure, a pulse signal may be periodically applied to the yaw relay through the execution module to reduce the risk of sticking and welding between the contacts.

[0111] When the preset detection time is reached, the system's execution module applies a forced pulse signal to the yaw relay. The current of the applied forced pulse signal can make the coil of the yaw relay generate sufficient magnetic flux to generate an offset force on the contacts through the magnetic flux, and the pulse-shaped electrical signal can cause the contacts to generate mechanical vibrations to reduce the risk of bonding and welding between the contacts.

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

[0113] For the sake of safety, a single periodic test may be performed by applying a forced pulse signal multiple times to ensure that the risk of bonding and welding between contacts is reduced.

[0114] After completion, wait for the next regular detection cycle to arrive.

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

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

[0117] The switching response time is used to determine whether the yaw relay has aged.

[0118] Once completed, wait for the next regular verification cycle to arrive.

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

[0120] After confirming that a fault that cannot be eliminated has occurred, the wind turbine unit sends a yaw fault alarm message to the management platform. The platform manager arranges maintenance personnel to conduct on-site troubleshooting and repair based on the alarm message. The yaw fault alarm message may include feedback information from the yaw system and the attempt count to facilitate the platform manager to analyze and judge the fault.

[0121] The above-mentioned device can be implemented in the form of a computer program. Figure 5 Runs on the computer device shown.

[0122] See also Figure 5 , Figure 5 It is a schematic block diagram of the structure of a computer device provided in an embodiment of the present application.

[0123] See also Figure 5 The computer device includes a processor and a memory connected via a system bus, wherein the memory may include a non-volatile storage medium and an internal memory.

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

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

[0126] It should be understood that the processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. Among them, the general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc.

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

[0128] S1. Obtain feedback information from the yaw system;

[0129] The yaw system is started according to the wind demand, and feedback information of the yaw system is obtained. The feedback information of the yaw system includes the rotation direction of the yaw motor and the working current of the yaw motor.

[0130] S2, determine whether there is a yaw fault, if yes, proceed to step S3;

[0131] Whether the yaw relay is faulty can be determined by the rotation direction of the yaw motor and the operating current of the yaw motor.

[0132] S3, applying a pulse signal to the yaw relay to try to disconnect and reset the yaw relay, and adding 1 to the attempt count;

[0133] After confirming that the possibility of yaw relay failure is high, a pulse signal is applied to the yaw relay to try to release the bonded relay contacts. The attempt count is increased by 1, indicating that one attempt to release has been performed.

[0134] S4, determine whether the attempt count reaches a preset value, if yes, go to step S5, otherwise go back to step S1;

[0135] After completing one attempt to reset the yaw relay by applying a pulse signal to the yaw relay, check the attempt count. If the upper limit of the attempts has not been reached, continue to obtain feedback information from the yaw system to determine whether the yaw system has returned to normal. If it has not returned to normal, apply a pulse signal to the yaw relay again to try to reset the yaw relay. If the upper limit of the attempts has been reached, it is considered that the yaw relay cannot be reset by applying a pulse signal to the yaw relay.

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

[0137] When pulse signals are applied to the yaw relay multiple times in an 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 when the yaw motor has a large current. In this case, more advanced safety control instructions need to be activated to avoid motor burnout, drive damage and other faults to protect the yaw system.

[0138] In one embodiment, step S3 further includes:

[0139] S301, adding the yaw relay to the regular inspection list;

[0140] S302, determine whether the preset regular detection time has been reached, if yes, proceed to step S303;

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

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

[0143] When a yaw fault occurs and the yaw fault is resolved by applying a pulse signal to the yaw relay, it means that the yaw relay has a potential fault and needs to be regularly inspected and maintained. Specifically, pulse signals are regularly applied to the yaw relay to reduce the risk of adhesion and welding between contacts. To be on the safe side, a single regular inspection can be performed to apply forced pulse signals multiple times to ensure that the risk of adhesion and welding between contacts is reduced.

[0144] In one embodiment, step S3 further includes:

[0145] S311, add the yaw relay to the regular verification list;

[0146] S312, determining whether the preset yaw relay verification time has been reached, if yes, proceeding 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: Determine whether the switching response time is within a preset time range, and if so, return to S312.

[0149] When a yaw fault occurs and the yaw fault is resolved by applying a pulse signal to the yaw relay, it means that the yaw relay has a potential fault and needs to be regularly inspected. Specifically, a switching signal is regularly applied to the yaw relay to verify whether the switching response time of the yaw relay meets the requirements. By applying a switching signal to the yaw relay and combining the duration of the yaw relay switching action, the switching response time of the switching signal can be obtained. The switching response time can be used to determine whether the yaw relay is aging.

[0150] In one embodiment, after step S5, the process further includes sending relevant alarm information to notify maintenance personnel to perform maintenance in a timely manner.

[0151] After confirming that a fault that cannot be eliminated has occurred, the wind turbine unit sends a yaw fault alarm message to the management platform. The platform manager arranges maintenance personnel to conduct on-site troubleshooting and repair based on the alarm message. The yaw fault alarm message may include feedback information from the yaw system and the 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 operating current of the yaw motor.

[0153] Under normal circumstances, the rotation feedback of the yaw motor can indicate with a high probability whether the yaw relay is sticking. Combined with the working current of the yaw motor, when there is a large current in the yaw motor, it means that the yaw motor is in normal working condition, and it is necessary to start more advanced safety control instructions (such as disconnecting the power supply, disconnecting the fan safety chain, etc.) to avoid motor burning, drive damage and other faults, so as to protect the yaw system.

[0154] A computer-readable storage medium is also provided in an embodiment of the present application, wherein the computer-readable storage medium stores a computer program, wherein the computer program includes program instructions, and the processor executes the program instructions to implement any one of the wind turbine yaw system fault resetting methods provided in the embodiments of the present application.

[0155] For example, the program is loaded by the processor and may execute the following steps:

[0156] S1. Obtain feedback information from the yaw system;

[0157] S2, determine whether there is a yaw fault, if yes, proceed to step S3;

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

[0159] S4, determine whether the attempt count reaches a preset value, if yes, go to step S5, otherwise go back to step S1;

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

[0161] The computer-readable storage medium may be an internal storage unit of the computer device described in the above embodiments, such as a hard disk or memory of the computer device. The computer-readable storage medium may also be an external storage device of the computer device, such as a plug-in hard disk, a smart memory card (SmartMedia Card, SMC), a secure digital card (Secure Digital Card, SD Card), a flash card (Flash Card), etc. equipped on the computer device.

[0162] Furthermore, the computer-readable storage medium may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function, etc.; the data storage area may 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 implementation modes can be freely combined and superimposed without conflict.

[0164] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A method for resetting a yaw system fault of a wind turbine generator system, comprising: S1. Obtain feedback information from the yaw system; S2, determine whether there is a yaw fault, if yes, proceed to step S3; S3, applying a pulse signal to the yaw relay to try to disconnect and reset the yaw relay, and adding 1 to the attempt count; S4, determine whether the attempt count reaches a preset value, if yes, go to step S5, otherwise go back to step S1; S5. Send an emergency stop command to the yaw system.

2. The method according to claim 1, characterized in that In step S3, it also includes: S301, adding the yaw relay to the regular inspection list; S302, determine whether the preset regular detection time has been reached, if yes, proceed to step S303; S303, applying a forced pulse signal to the yaw relay, and adding 1 to the forced count; S304, determine whether the forced count reaches a preset value, if yes, return to S302, otherwise return to S303.

3. The method according to claim 1, characterized in that In step S3, it also includes: S311, add the yaw relay to the regular verification list; S312, determining whether the preset yaw relay verification time has been reached, if yes, proceeding to step S313; S313, applying a switching signal to the yaw relay to obtain a switching response time of the yaw relay; S314: Determine whether the switching response time is within a preset time range, and if so, return to S312.

4. The method according to claim 1, characterized in that: After step S5, the process also includes sending relevant alarm information to notify maintenance personnel to perform maintenance in a timely manner.

5. 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.

6. A wind turbine yaw system fault reset device, characterized in that: It includes an acquisition module, a judgment module, an execution module and a counting module; The acquisition module is used to obtain feedback information of the yaw system; The judgment module is used to judge whether there is a yaw fault and whether the attempt count reaches a preset value; The execution module is used to send an emergency stop command to the yaw system; The counting module is used for adding 1 to the attempt count.

7. The device according to claim 6, characterized in that: Also included is an adding module, the adding module is used to add the yaw relay to a regular inspection list and add the yaw relay to a regular verification list; The judgment module is also used to judge whether the preset periodic detection time has been reached, whether the forced count has reached a preset value, whether the preset yaw relay verification time has been reached, and whether the switching response time is within a preset time range; The execution module is also used to apply a forced pulse signal to the yaw relay and a switching signal to the yaw relay; The counting module is further configured to add 1 to the forced count.

8. The device according to claim 6, characterized in that: It also includes an alarm module, which is used to send relevant alarm information to notify maintenance personnel to perform maintenance in time.

9. 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 used to execute the computer program and implement the wind turbine yaw system fault reset method according to any one of claims 1 to 5 when executing the computer program.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the processor implements the method for resetting a yaw system fault of a wind turbine set according to any one of claims 1 to 5.

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