A method and system for detecting synchronization of yaw motor of wind turbine

Abstract

The present invention provides a method and system for detecting the synchronization of the yaw motor of a wind turbine, which can monitor in real time whether the operation status of each yaw motor is normal and synchronous, adjust the process in time and repair the yaw motor with abnormal operation, so as to maintain the long-term stable operation of the yaw system. The method includes: starting the N yaw motors of the wind turbine at the same time, and the yaw motors receive electric energy to start the operation test; obtaining the yaw operation detection parameters of the N yaw motors, comparing whether the yaw operation parameters of the N yaw motors change synchronously, if not, the operation is abnormal, and the asynchronous yaw motors are marked; if they change synchronously, obtaining the electromagnetic brake voltage of the N yaw motors when they stop running, comparing whether the electromagnetic brake voltage of the N yaw motors when they stop running stops changing synchronously, if they stop synchronously, the N yaw motors of the group are all operating normally; if they stop asynchronously, the operation is abnormal, and the yaw motors that stop asynchronously are marked.

Description

Technical Field

[0001] The present invention belongs to the technical field of motor monitoring, and in particular relates to a method and system for detecting synchronization of a yaw motor of a wind turbine set. Background Art

[0002] Wind turbines (abbreviated as wind turbines) convert the acquired wind energy into mechanical energy through the rotation of the impeller, and then the generator converts the mechanical energy into electrical energy. The yaw system of a wind turbine is that when the positive direction of the wind turbine deviates from the natural wind direction by a certain angle, the wind turbine will naturally yaw to a position consistent with the natural wind direction, to ensure that the wind turbine can automatically and smoothly calibrate its direction under the condition of changing natural wind direction to maintain the maximum utilization rate of wind energy. Therefore, the yaw control system is an important part of a wind turbine.

[0003] During the operation of the yaw motor, there are problems such as overload, brake problems, yaw motor failure or motor three-phase imbalance, and short circuit faults between three-phase winding turns. The above faults will affect the stable operation of the yaw system to varying degrees, and in severe cases, cause the yaw motor to shut down. There are currently two main control methods used in the passive yaw structure of wind turbines: (1) using a yaw inverter to control the yaw motor, and the yaw inverter sends start and stop commands to the yaw motor; (2) using contactors and relays to control the yaw motor, the main control sends commands to the control module, and the control module controls the contactors and relays to control the yaw motor.

[0004] The above two control methods can realize that the yaw motor electromagnetic brake accepts the relevant commands of the main control and turns on or off, and can also realize that the yaw motor accepts the relevant commands of the main control and turns on or off, but the yaw motor load power is not measured and compared, and the action synchronization of the yaw motor electromagnetic brake is not compared. The main control device cannot perform relevant alarm or fault settings, which may easily lead to a motor load being too large but not exceeding the single motor current protection. The main control device cannot monitor and find the corresponding yaw motor with excessive load in time and take corresponding countermeasures. Some yaw motors or reducers with heavy loads are prone to failure or even damage after long-term operation, affecting the stable operation of the overall yaw system. Summary of the invention

[0005] In order to solve the problems existing in the prior art, the present invention provides a method and system for detecting the synchronization of the yaw motor of a wind turbine set, which can monitor in real time whether the operating status of each yaw motor in the wind turbine set is normal and synchronous, adjust the process in time and repair the yaw motor with abnormal operation, maintain the long-term stable operation of the yaw system while further optimizing the yaw system.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A method for detecting synchronization of a yaw motor of a wind turbine generator set comprises the following steps:

[0008] At the same time, N yaw motors of the wind turbine set are turned on, and the yaw motors receive electric energy and start running test, where N is a natural number greater than 1;

[0009] Obtaining yaw operation detection parameters of N yaw motors, wherein the yaw operation detection parameters include the electromagnetic brake voltage when the N yaw motors are started and the power when the N yaw motors are running;

[0010] Compare whether the yaw operation parameters of N yaw motors change synchronously. If they do not change synchronously, the operation is abnormal, and the asynchronous yaw motor is marked;

[0011] If they change synchronously, obtain the electromagnetic brake voltages of the N yaw motors when they stop running, and compare whether the electromagnetic brake voltages of the N yaw motors stop changing synchronously when they stop running.

[0012] If they stop synchronously, then the N yaw motors in this group are all operating normally;

[0013] If it stops asynchronously, the operation is abnormal and the yaw motor that stops asynchronously will be marked.

[0014] Preferably, the obtaining of the power of N yaw motors when in operation includes:

[0015] The voltage and current of the N yaw motors when they are running are measured, and the power of the N yaw motors when they are running is calculated based on the voltage and current.

[0016] Preferably, before comparing whether the yaw operation detection parameters of the N yaw motors change synchronously, the measured current values ​​of the N yaw motors are compared with a preset standard current value.

[0017] If it is greater than the preset standard current value, the current operation test is stopped and the yaw motor with a current value greater than the standard current value is marked;

[0018] If it is not greater than the preset standard current value, proceed to the next step.

[0019] Preferably, the method further comprises saving the yaw operation detection parameters of the yaw motor after the operation test is completed;

[0020] If the operation is normal, the yaw operation detection parameters of the yaw motor are saved;

[0021] If the operation is abnormal, save the yaw operation detection parameters of the yaw motor and draw a yaw operation detection parameter change curve.

[0022] Preferably, the control method of simultaneously turning on or off the N yaw motors of the wind turbine generator set includes:

[0023] The main control device turns on the yaw frequency converter, and the yaw frequency converter directly sends start and stop instructions to the yaw motor;

[0024] Or the main control device sends a start or stop command to the control module, and the control module controls the contactor and relay to turn on or off the yaw motor.

[0025] A yaw motor synchronization detection system for a wind turbine generator set, comprising:

[0026] The main control device is used to simultaneously start the N yaw motors of the wind turbine generator set, and the yaw motors receive power and start running tests;

[0027] Synchronous acquisition module, used to obtain the yaw operation detection parameters of N yaw motors;

[0028] The synchronous analysis module is used to compare whether the yaw operation detection parameters of the N yaw motors change synchronously or stop changing synchronously.

[0029] Preferably, the synchronous acquisition module includes:

[0030] A synchronous measurement unit is used to measure the electromagnetic brake voltage when the N-way yaw motor is started, to measure the electromagnetic brake voltage when the N-way yaw motor is stopped, and to measure the voltage and current when the N-way yaw motor is running;

[0031] The synchronous calculation unit is used to calculate the power of the N yaw motors when they are running according to the voltage and current.

[0032] Preferably, it also includes a comparison module, which is used to compare the current values ​​of the N yaw motors with a preset standard current value before comparing whether the yaw operation detection parameters of the N yaw motors change synchronously.

[0033] Preferably, it also includes a storage module for saving the yaw operation detection parameters of the yaw motor after the operation test is completed, and drawing a yaw operation detection parameter change curve diagram.

[0034] Preferably, the control device for simultaneously turning on or off N yaw motors of a wind turbine generator set comprises:

[0035] Yaw frequency converter, used to directly send start and stop instructions to the yaw motor;

[0036] Or control module, used to receive the start and stop instructions sent by the main control device, and control the contactor and relay to turn on or off the yaw motor.

[0037] Compared with the prior art, the present invention has the following beneficial effects:

[0038] The present invention provides a method for detecting the synchronization of yaw motors of a wind turbine set. By controlling to simultaneously turn on or off N yaw motors in a wind turbine set, and capturing the yaw operation detection parameters of each yaw motor when it starts running, is running, and stops running, and comparing whether the yaw operation detection parameters of each yaw motor change synchronously or stop changing synchronously, the method can monitor the operating status of the yaw motors of the wind turbine set and detect the abnormal operation of each yaw motor, mark the abnormal yaw motors in time, inspect and replace them, and ensure the stable operation of the yaw system of the wind turbine set.

[0039] Furthermore, the yaw operation detection parameters for judging the synchronization of the yaw motor of the wind turbine set in the present invention include the synchronization of the yaw motor electromagnetic brake voltage operation and stop operation, and can compare the sequence of the electromagnetic brake opening time and the yaw motor action, thereby realizing the optimization of the electromagnetic brake action of the yaw motor of the yaw system.

[0040] Furthermore, in addition to capturing and recording the synchronization of the electromagnetic brake voltage of the yaw motor when it is running and when it stops running to determine whether the operation of each yaw motor is normal, the present invention also captures the real-time operating status of the yaw motor, including collecting and calculating the real-time working current and voltage of the yaw motor to obtain the real-time power of the yaw motor. By comparing the synchronization of the real-time working power of each yaw motor, it can be determined whether there is uneven load on the yaw motor in this group of wind turbines during operation, and according to the obtained data, the process can be adjusted in time to avoid damage to a yaw motor due to long-term heavy load, thereby affecting the long-term stable operation of the yaw motor of the wind turbine as a whole.

[0041] The wind turbine yaw motor synchronization detection system provided by the present invention can comprehensively monitor the initial operating state, operating state and stopped operating state of the yaw motor, that is, the detection of the entire group of yaw motors during the entire operation process. It has a wide monitoring area, comprehensive coverage, and accurate detection. It can accurately locate each abnormal yaw motor and make adjustments, thereby avoiding operating failures of the wind turbine as much as possible and ensuring its long-term stable operation.

[0042] Furthermore, after the operation test is completed, the yaw operation detection parameters are saved, and a yaw operation detection parameter change curve is drawn to facilitate subsequent fault diagnosis of the yaw motor and provide accurate data support for system optimization. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a flowchart of the steps of the synchronization detection method of the present invention;

[0044] Figure 2 It is a structural block diagram of the synchronization detection system of the present invention;

[0045] Figure 3 is a system topology diagram of an embodiment of the present invention;

[0046] Figure 4 It is a flow chart of an embodiment of the present invention.

[0047] In the figure, there are a main control device 100 , a synchronization acquisition module 110 , a synchronization analysis module 120 , a comparison module 130 , and a storage module 140 . DETAILED DESCRIPTION

[0048] The present invention is further described in detail below in conjunction with specific embodiments, which are intended to explain the present invention rather than to limit it.

[0049] like Figure 1 As shown, a method for detecting synchronization of a yaw motor of a wind turbine generator set comprises the following steps:

[0050] At the same time, N yaw motors of the wind turbine set are turned on, and the yaw motors receive electric energy and start running test, where N is a natural number greater than 1;

[0051] Obtaining yaw operation detection parameters of N yaw motors, wherein the yaw operation detection parameters include the electromagnetic brake voltage when the N yaw motors are started and the power when the N yaw motors are running;

[0052] Compare the yaw operation detection parameters of the N yaw motors to see if they change synchronously.

[0053] If there is no synchronous change, the operation is abnormal and the asynchronous yaw motor is marked;

[0054] If they change synchronously, obtain the electromagnetic brake voltages of the N yaw motors when they stop running, and compare whether the electromagnetic brake voltages of the N yaw motors stop changing synchronously when they stop running.

[0055] If they stop synchronously, then the N yaw motors in this group are all operating normally;

[0056] If it stops asynchronously, the operation is abnormal and the yaw motor that stops asynchronously will be marked.

[0057] Specifically, when yaw is started, the electromagnetic brake voltages of the N yaw motors are monitored to observe whether they change synchronously. If they do not change synchronously, the asynchronous yaw motors are marked and the digital signals are recorded. If they change synchronously, they are not recorded. During the yaw process, the current, voltage and power of the N yaw motors are monitored, and the analog data are recorded. If the data are inconsistent, the group of motors is marked as abnormal. If the data are consistent, they are not recorded. When yaw stops, the electromagnetic brake voltages of the N yaw motors are monitored to observe whether they change synchronously. If they do not change synchronously, the asynchronous yaw motors are marked and the digital signals are recorded. If they change synchronously, they are not recorded.

[0058] The present invention provides a method for detecting the synchronization of a yaw motor of a wind turbine set. The method controls N yaw motors in a wind turbine set to be turned on or off simultaneously, and captures the yaw operation detection parameters of each yaw motor when it starts to run and during operation, and compares whether the yaw operation detection parameters of each yaw motor change synchronously or stop changing synchronously. Then, the electromagnetic brake voltage when the operation is stopped can be used to monitor the operation status of the yaw motor of the entire wind turbine set, and detect the operation abnormality of each yaw motor. According to the obtained results, the yaw motor corresponding to the overload but not exceeding the current protection of a single motor is found, the yaw motor with the abnormal condition is marked in time, the operation is stopped, and the motor is inspected and replaced, and the process is adjusted to maintain the long-term stable operation of the yaw system of the wind turbine set.

[0059] In this embodiment, obtaining the power of N yaw motors when they are running includes:

[0060] The voltage and current of the N yaw motors when they are running are measured, and the power of the N yaw motors when they are running is calculated based on the voltage and current.

[0061] The steps for determining the synchronous change of the electromagnetic brake voltages of N yaw motors include:

[0062] Get the electromagnetic brake voltage of N yaw motors during operation;

[0063] Compare the electromagnetic brake voltages of the N yaw motors to see if they change synchronously.

[0064] If there is no synchronous change, the operation is abnormal and the asynchronous yaw motor is marked;

[0065] If they change synchronously, turn off the N yaw motors at the same time, obtain the electromagnetic brake voltages of the N yaw motors when they stop running, and compare whether the electromagnetic brake voltages of the N yaw motors stop synchronously.

[0066] If they stop synchronously, then the N yaw motors in this group are all operating normally;

[0067] If it stops asynchronously, the operation is abnormal and the yaw motor that stops asynchronously will be marked.

[0068] The present invention compares the sequence of the electromagnetic brake opening time and the yaw motor action, thereby optimizing the electromagnetic brake action of the yaw motor of the yaw system.

[0069] The step of judging the synchronous change of the power of N yaw motors includes:

[0070] Obtain the voltage and current of N yaw motors, and calculate the power of N yaw motors;

[0071] Compare whether the power of N yaw motors changes synchronously.

[0072] If they change synchronously, the N yaw motors in this group are all operating normally, and the operation test is completed;

[0073] If there is an asynchronous change, the operation is abnormal, the asynchronous yaw motor is marked, and the operation of this group of yaw motors is stopped.

[0074] In addition to capturing and recording the synchronization of the electromagnetic brake voltage of the yaw motor when it is running and when it stops running to determine whether the operation of each yaw motor is normal, the present invention also captures the real-time operating status of the yaw motor, including the collection of the real-time working current, voltage and power of the yaw motor. By comparing the synchronization of the real-time working power of each yaw motor, it can be determined whether there is uneven load on the yaw motor in this group of wind turbines during operation, and according to the obtained data, the process is adjusted in time to avoid damage to a yaw motor due to long-term heavy load, thereby affecting the long-term stable operation of the overall yaw motor of the wind turbine.

[0075] In this embodiment, before comparing whether the yaw operation detection parameters of the N yaw motors change synchronously, the current values ​​of the N yaw motors are compared with a preset standard current value.

[0076] If it is greater than the preset standard current value, the current operation test is stopped and the yaw motor with a current value greater than the standard current value is marked;

[0077] If it is not greater than the preset standard current value, proceed to the next step.

[0078] Before performing synchronization detection on the entire set of yaw motors, the present invention also includes a step of pre-screening yaw motors that have obvious operating abnormalities. By comparing with standard current values, yaw motors with excessive loads that exceed the current protection threshold of a single motor are preferably screened out, which can save time and improve screening efficiency.

[0079] In this embodiment, the step of saving the yaw operation detection parameters after the operation test is completed is also included;

[0080] If the operation is normal, the yaw operation detection parameters of the yaw motor are saved;

[0081] If the operation is abnormal, save the yaw operation detection parameters of the yaw motor and draw a yaw operation detection parameter change curve.

[0082] The present invention stores the yaw operation detection parameter results of each operation test, which can be used as a reference standard for subsequent tests, and draws a change trend diagram of the yaw operation detection parameters of the abnormal yaw motor, observes the development trend of the abnormality, makes a prediction in advance, and makes timely adjustments, and further optimizes the yaw system according to the change results.

[0083] In this embodiment, the control method of simultaneously turning on or off the N yaw motors of the wind turbine generator set includes:

[0084] The main control device turns on the yaw frequency converter, and the yaw frequency converter directly sends start and stop instructions to the yaw motor;

[0085] Or the main control device sends a start or stop command to the control module, and the control module controls the contactor and relay to turn on or off the yaw motor.

[0086] like Figure 2 As shown, the present invention provides a yaw motor synchronization detection system for a wind turbine generator set, comprising:

[0087] The main control device 100 is used to simultaneously start the N yaw motors of the wind turbine generator set, and the yaw motors receive electric energy to start the running test;

[0088] A synchronous acquisition module 110 is used to obtain yaw operation detection parameters of N yaw motors;

[0089] The synchronization analysis module 120 is used to compare whether the yaw operation detection parameters of the N yaw motors change synchronously or stop changing synchronously.

[0090] In this embodiment, the synchronous acquisition module 110 includes:

[0091] A synchronous measurement unit is used to measure the electromagnetic brake voltage when the N-way yaw motor is started, to measure the electromagnetic brake voltage when the N-way yaw motor is stopped, and to measure the voltage and current when the N-way yaw motor is running;

[0092] The synchronous calculation unit is used to calculate the power of the N yaw motors when they are running according to the voltage and current.

[0093] The present invention provides a yaw motor synchronization detection system for a wind turbine. The yaw motor is controlled to start and stop running by a main control device 100. A synchronization acquisition module 110 is provided to capture real-time yaw operation detection parameters of N yaw motors and a corresponding synchronization analysis module 120 is provided to continuously capture and record the collected real-time yaw motor status data, thereby optimizing the motor current of the yaw system, the electromagnetic brake action of the yaw motor, etc., and determining whether there is an uneven load phenomenon in the yaw motor.

[0094] The wind turbine yaw motor synchronization detection system provided by the present invention can comprehensively monitor the initial operating state, operating state and stopped operating state of the yaw motor, that is, the detection of the entire group of yaw motors during the entire operation process. It has a wide monitoring area, comprehensive coverage, and accurate detection. It can accurately locate each abnormal yaw motor and make adjustments, thereby avoiding operating failures of the wind turbine as much as possible and ensuring its long-term stable operation.

[0095] In this embodiment, a comparison module 130 is also included, which is used to compare and mark the current values ​​of the N yaw motors with preset standard current values ​​before comparing whether the yaw operation detection parameters of the N yaw motors change synchronously. The yaw motors with excessive loads that exceed the current protection threshold of a single motor can be quickly screened out.

[0096] In this embodiment, a storage module 140 is also included, which is used to save the yaw operation detection parameters after the operation test is completed, and to draw a yaw operation detection parameter change curve diagram to facilitate subsequent fault diagnosis of the yaw motor and provide accurate data support for system optimization.

[0097] In this embodiment, the control device for simultaneously starting or shutting down the N yaw motors of the wind turbine generator set includes a yaw frequency converter for directly sending start and stop instructions to the yaw motor;

[0098] Or a control module, which is used to receive the start and stop instructions sent by the main control device 100, and control the contactor and relay to turn on or off the yaw motor.

[0099] like Figure 3 and 4 As shown, the specific implementation steps of the preferred embodiment of the present invention are as follows:

[0100] Start the oscilloscope or similar instrument and begin to record the motor electromagnetic brake voltage; start the power analysis and record the motor working power and current, start the host computer software and set the standard current value, and then collect the yaw motor electromagnetic brake voltage;

[0101] The main control system turns on the frequency converter or contactor, the yaw motor electromagnetic brake is powered, the yaw motor receives electrical energy, and an oscilloscope or similar instrument captures the electromagnetic brake voltage;

[0102] The yaw motor receives the change of electric energy and starts to work. An oscilloscope or similar instrument captures the change of the electromagnetic brake voltage of the yaw motor and compares whether the electromagnetic brakes of the N motors are synchronized. If not, the alarm module sends an alarm signal. If they are synchronized, proceed to the next step.

[0103] The power analyzer starts to run and collect current and power, compares them with the set standard current values, and marks the data of a certain yaw motor that fails the standard in red;

[0104] The power analyzer compares the power synchronization of N motors. If they are not synchronized, the alarm module sends an alarm signal. If they are synchronized, it proceeds to the next step.

[0105] The main control system controls the frequency converter or contactor to turn off the yaw motor and stop it. The oscilloscope or similar instrument captures the voltage change of the yaw motor and compares whether the electromagnetic brakes of the N motors stop synchronously. If not, the alarm module sends an alarm signal. If they are running synchronously, proceed to the next step.

[0106] The storage module automatically saves data;

[0107] The main control system controls the programmable logic controller to turn off the inverter or contactor, and the synchronization detection ends. The above is only a specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or replacements within the technical scope disclosed by the present invention, which should be covered within the protection scope of the present invention.

Claims

1. A method for detecting the synchronization of a yaw motor of a wind turbine, characterized in that: The following steps are involved: At the same time, N yaw motors of the wind turbine set are turned on, and the yaw motors receive electric energy and start running test, where N is a natural number greater than 1; Obtaining yaw operation detection parameters of N yaw motors, wherein the yaw operation detection parameters include the electromagnetic brake voltage when the N yaw motors are started and the power when the N yaw motors are running; Compare whether the yaw operation parameters of N yaw motors change synchronously. If they do not change synchronously, the operation is abnormal, and the asynchronous yaw motor is marked; If they change synchronously, obtain the electromagnetic brake voltages of the N yaw motors when they stop running, and compare whether the electromagnetic brake voltages of the N yaw motors stop changing synchronously when they stop running. If they stop synchronously, then the N yaw motors in this group are all operating normally; If it stops asynchronously, the operation is abnormal, and the yaw motor that stops asynchronously is marked; The method of obtaining the power of N yaw motors when they are in operation includes: Measure the voltage and current of N yaw motors when they are running, and calculate the power of N yaw motors when they are running according to the voltage and current; The control method of simultaneously turning on or off the N yaw motors of the wind turbine generator set includes: The main control device turns on the yaw frequency converter, and the yaw frequency converter directly sends start and stop instructions to the yaw motor; Or the main control device sends a start or stop command to the control module, and the control module controls the contactor and relay to turn on or off the yaw motor.

2. A method for detecting synchronization of a yaw motor of a wind turbine according to claim 1, characterized in that: Before comparing whether the yaw operation detection parameters of the N-way yaw motors change synchronously, the measured current values ​​of the N-way yaw motors are compared with the preset standard current values. If it is greater than the preset standard current value, the current operation test is stopped and the yaw motor with a current value greater than the standard current value is marked; If it is not greater than the preset standard current value, proceed to the next step.

3. A method for detecting synchronization of yaw motors of wind turbines according to any one of claim 1, characterized in that: It also includes saving the yaw operation detection parameters of the yaw motor after the operation test is completed; If the operation is normal, the yaw operation detection parameters of the yaw motor are saved; If the operation is abnormal, save the yaw operation detection parameters of the yaw motor and draw a yaw operation detection parameter change curve.

4. A wind turbine yaw motor synchronization detection system, characterized in that: include, A main control device (100) is used to simultaneously start N yaw motors of the wind turbine generator set, and the yaw motors receive electric energy and start running tests; A synchronous acquisition module (110) is used to obtain yaw operation detection parameters of N yaw motors; A synchronization analysis module (120) is used to compare whether the yaw operation detection parameters of the N yaw motors change synchronously or stop changing synchronously; The synchronous acquisition module (110) comprises: A synchronous measurement unit is used to measure the electromagnetic brake voltage when the N-way yaw motor is started, to measure the electromagnetic brake voltage when the N-way yaw motor is stopped, and to measure the voltage and current when the N-way yaw motor is running; A synchronous calculation unit, used for calculating the power of N yaw motors when they are running according to the voltage and current; The control device for simultaneously turning on or off the N yaw motors of the wind turbine generator set comprises: Yaw frequency converter, used to directly send start and stop instructions to the yaw motor; Or control module, used to receive the start and stop instructions sent by the main control device, and control the contactor and relay to turn on or off the yaw motor.

5. A wind turbine yaw motor synchronization detection system according to claim 4, characterized in that: It also includes a comparison module (130) for comparing the current values ​​of the N yaw motors with a preset standard current value before comparing whether the yaw operation detection parameters of the N yaw motors change synchronously.

6. A wind turbine yaw motor synchronization detection system according to any one of claim 4, characterized in that: It also includes a storage module (140) for storing the yaw operation detection parameters of the yaw motor after the operation test is completed, and drawing a yaw operation detection parameter change curve diagram.

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