CN114646875A - A method and system for detecting synchronization of yaw motor of wind turbine - Google Patents

Abstract

The invention provides a method and a system for detecting the synchronism of a yaw motor of a wind turbine generator, which can monitor whether the running state of each path of yaw motor is normal and synchronous in real time, adjust the process in time, maintain the yaw motor which runs abnormally, and maintain the long-term stable running of a yaw system. The method comprises the steps that N paths of yaw motors of the wind turbine generator are started simultaneously, and the yaw motors receive electric energy to start running test; acquiring yaw running detection parameters of N paths of yaw motors, comparing whether the yaw running parameters of the N paths of yaw motors change synchronously or not, if the yaw running parameters change asynchronously, the yaw motors operate abnormally, and marking the asynchronous yaw motors; if the synchronous change happens, the electromagnetic brake voltage of the N paths of yaw motors in the stopped operation is obtained, whether the electromagnetic brake voltage of the N paths of yaw motors in the stopped operation synchronously stops changing or not is compared, and if the electromagnetic brake voltage synchronously stops, the N paths of yaw motors in the group all operate normally; and if the asynchronous motor stops asynchronously, the operation is abnormal, and the yaw motor which stops asynchronously is marked.

Description

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

technical field

The invention belongs to the technical field of motor monitoring, and in particular relates to a method and a system for detecting the synchronicity of a yaw motor of a wind turbine.

Background technique

Wind turbines (referred to 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 the wind turbine is that when the positive direction of the wind turbine is offset by a certain angle from the natural wind direction, the wind turbine will naturally yaw to a position consistent with the natural wind direction, so as to ensure that the wind turbine is in the changeable natural wind direction. It can automatically and smoothly calibrate its direction to maintain the maximum availability of wind energy under conditions, so the yaw control system is an important part of the wind turbine.

During the operation of the yaw motor, there are faults such as excessive load, braking problems, failure of the yaw motor to rotate or three-phase imbalance of the motor, and short-circuit faults between turns of the three-phase windings. The above faults will affect the stable operation of the yaw system to varying degrees, and cause the yaw motor to stop in severe cases. There are two main control methods currently used in the passive yaw structure of wind turbines: (1) the yaw inverter is used to control the yaw motor, and the yaw inverter sends start and stop commands to the yaw motor; (2) the yaw motor is controlled by the yaw inverter; The contactors and relays control the yaw motor, and the main control sends commands to the control module, which controls the contactors and relays to control the yaw motor.

The above two control methods can realize that the electromagnetic brake of the yaw motor can accept the relevant commands of the main control and turn on or off, or the yaw motor can accept the relevant commands of the main control and turn on or off, but it does not load the yaw motor. The power is measured and compared, and the synchronization of the action of the electromagnetic brake of the yaw motor is not compared. The main control device cannot perform related alarm or fault settings, so it is easy to have a certain motor load that is too large but does not exceed the current protection of a single motor. The main control device cannot monitor and find out the corresponding yaw motor with heavy load in time and take corresponding countermeasures. Some yaw motors or reducers with large loads are prone to failure or even damage after long-term operation, which affects the overall yaw system. Stable operation.

SUMMARY OF THE INVENTION

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, which can monitor in real time whether the running state of each yaw motor in the wind turbine is normal and synchronized, and adjust the process in time. Repair the abnormal yaw motor, and further optimize the yaw system while maintaining the long-term stable operation of the yaw system.

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

A method for detecting synchronism of a yaw motor of a wind turbine, comprising the following steps:

At the same time, the N-way yaw motor of the wind turbine is turned on, and the yaw motor receives the electric energy and starts to run the test, where N is a natural number greater than 1;

Obtain the yaw operation detection parameters of the N-way yaw motor, wherein the yaw operation detection parameters include the electromagnetic brake voltage when the N-way yaw motor starts and the power of the N-way yaw motor when it is running;

Compare whether the yaw operation parameters of the N-way yaw motors change synchronously. If they do not change synchronously, the operation is abnormal, and the asynchronous yaw motors are marked;

If it changes synchronously, obtain the electromagnetic braking voltage of the N-way yaw motor when it stops running, and compare whether the electromagnetic braking voltage of the N-way yaw motor stops changing synchronously when it stops running.

If the synchronization stops, the N-way yaw motors of this group are all running normally;

If it stops asynchronously, the operation is abnormal, and the yaw motor that stops asynchronously is marked.

Preferably, the obtaining the power of the N-way yaw motor when running includes,

Measure the voltage and current of the N-way yaw motor when it is running, and calculate the power of the N-way yaw motor when it is running according to the voltage and current.

Preferably, before comparing whether the yaw operation detection parameters of the N-way yaw motors change synchronously, the measured current value of the N-way yaw motor is compared with a preset standard current value,

If it is greater than the preset standard current value, stop this running test, and mark the yaw motor that is greater than the standard current value;

If it is not greater than the preset standard current value, continue to the next step.

Preferably, it also includes saving the yaw running detection parameters of the yaw motor after the running test is finished;

Among them, 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 the change curve of the yaw operation detection parameters.

Preferably, the control method for simultaneously turning on or off the N-way yaw motors of the wind turbine includes:

The main control device turns on the yaw inverter, and the yaw inverter directly sends start and stop commands to the yaw motor;

Or the main control device sends start and stop commands to the control module, and the control module controls the contactor and relay to turn on or off the yaw motor.

A wind turbine yaw motor synchronization detection system, comprising,

The main control device is used to turn on the N-way yaw motor of the wind turbine at the same time, and the yaw motor receives the electric energy and starts to run the test;

The synchronous acquisition module is used to obtain the yaw operation detection parameters of the N-way yaw motor;

The synchronization analysis module is used to compare whether the yaw running detection parameters of the N-way yaw motors change synchronously or stop changing synchronously.

Preferably, the synchronous acquisition module includes:

The synchronous measurement unit is used to measure the electromagnetic brake voltage when the N-way yaw motor starts, the electromagnetic brake voltage when the N-way yaw motor stops running, and the voltage and current when the N-way yaw motor is running;

The synchronous calculation unit is used to calculate the running power of the N-way yaw motor according to the voltage and current.

Preferably, a comparison module is also included for comparing the current value of the N-way yaw motor with a preset standard current value before comparing whether the yaw operation detection parameters of the N-way yaw motor change synchronously.

Preferably, a storage module is also included for saving the yaw operation detection parameters of the yaw motor after the running test is completed, and drawing a change curve of the yaw operation detection parameters.

Preferably, the control device for simultaneously turning on or off the N-way yaw motors of the wind turbine comprises:

Yaw inverter, used to directly send start and stop commands to the yaw motor;

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

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

The invention provides a method for detecting the synchronism of yaw motors of wind turbines. By controlling to turn on or off N-way yaw motors in the wind turbine at the same time, and capture the yaw motors of each channel when they start running, during operation and when they stop running The yaw operation detection parameters of each yaw motor are compared, and whether the yaw operation detection parameters of each yaw motor changes synchronously or stops synchronously, it can monitor the operation status of the yaw motor of the wind turbine, and detect the abnormal operation of each yaw motor. If the situation is abnormal, mark the abnormal yaw motor in time, check and replace it, and ensure the stable operation of the wind turbine yaw system.

Further, the yaw operation detection parameter for judging the synchronization of the yaw motor of the wind turbine in the present invention includes the synchronization of the electromagnetic brake voltage of the yaw motor and the synchronization when the operation is stopped, and the relationship between the opening time of the electromagnetic brake and the action of the yaw motor can be carried out. In order to achieve the optimization of the electromagnetic braking action of the yaw motor of the yaw system.

Further, in the present invention, in addition to judging whether the operation of each yaw motor is normal by capturing and recording the synchronization of the electromagnetic brake voltage of the above-mentioned yaw motor during operation and stop operation, it also records the real-time operation status of the yaw motor. Captured, including the acquisition and calculation of 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 judged Whether there is uneven load of the yaw motor in the wind turbine, and according to the obtained data, adjust the process in time to avoid damage to a yaw motor with a large load for a long time, thus affecting the long-term stability of the overall yaw motor of the wind turbine. run.

The wind turbine yaw motor synchronization detection system provided by the present invention can monitor the initial running state, the running state and the stopped running state of the yaw motor in all aspects, that is, the detection of the whole group of yaw motors in the whole operation process, The monitoring has a wide range, comprehensive coverage, and accurate detection. It can precisely locate and adjust the abnormal yaw motor of each road, so as to avoid the operation failure of the wind turbine as much as possible and ensure its long-term stable operation.

Further, after the running test is completed, the yaw running detection parameters are saved, and the change curve of the yaw running detection parameters is drawn to facilitate subsequent fault diagnosis of the yaw motor and provide accurate data support for system optimization.

Description of drawings

Fig. 1 is the flow chart of the steps of the synchronization detection method of the present invention;

Fig. 2 is the structural block diagram of the synchronization detection system of the present invention;

3 is a system topology diagram of an embodiment of the present invention;

FIG. 4 is a flowchart of an embodiment of the present invention.

In the figure, the main control device 100 , the synchronous acquisition module 110 , the synchronous analysis module 120 , the comparison module 130 , and the storage module 140 .

Detailed ways

The present invention will be further described in detail below in conjunction with specific embodiments, which are to explain rather than limit the present invention.

As shown in Figure 1, a method for detecting the synchronization of a yaw motor of a wind turbine includes the following steps:

At the same time, the N-way yaw motor of the wind turbine is turned on, and the yaw motor receives the electric energy and starts to run the test, where N is a natural number greater than 1;

Obtain the yaw operation detection parameters of the N-way yaw motor, wherein the yaw operation detection parameters include the electromagnetic brake voltage when the N-way yaw motor starts and the power of the N-way yaw motor when it is running;

Compare whether the yaw operation detection parameters of the N-way yaw motors change synchronously,

If it does not change synchronously, the operation is abnormal, and the asynchronous yaw motor is marked;

If it changes synchronously, obtain the electromagnetic braking voltage of the N-way yaw motor when it stops running, and compare whether the electromagnetic braking voltage of the N-way yaw motor stops changing synchronously when it stops running.

If the synchronization stops, the N-way yaw motors of this group are all running normally;

If it stops asynchronously, the operation is abnormal, and the yaw motor that stops asynchronously is marked.

Specifically, when the yaw starts, monitor the electromagnetic brake voltage of the N-way yaw motor to observe whether it changes synchronously. If it does not change synchronously, mark the asynchronous yaw motor and record the digital signal. If it changes synchronously, then Do not record; during the yaw process, monitor the current, voltage and power of the N-way yaw motor, and record the analog data. If the data is inconsistent, mark the group of motors as abnormal. If the data are consistent, do not record; when the yaw stops, monitor N-way yaw motor electromagnetic braking voltage, observe whether it changes synchronously, if it does not change synchronously, mark the asynchronous yaw motor, and record the digital signal, if it changes synchronously, it will not be recorded.

The present invention provides a method for detecting the synchronism of yaw motors of wind turbines. By controlling N-way yaw motors in the wind turbine to turn on or off at the same time, and to capture the yaw of each yaw motor when it starts to run and in the process of running Operation detection parameters, compare whether the yaw operation detection parameters of each yaw motor change synchronously or stop synchronously, and then through the electromagnetic brake voltage when the operation is stopped, the overall wind turbine yaw motor operation status can be monitored, and each yaw motor can be detected. If the yaw motor runs abnormally, according to the obtained results, find out the yaw motor whose load is too large but does not exceed the current protection of a single motor, mark the abnormal yaw motor in time, stop the operation, and carry out Check and replace, adjust the process, and maintain the long-term stable operation of the wind turbine yaw system.

In this embodiment, the obtaining of the power of the N-way yaw motors during operation includes:

Measure the voltage and current of the N-way yaw motor when it is running, and calculate the power of the N-way yaw motor when it is running according to the voltage and current.

Wherein, the step of judging the synchronous change of the electromagnetic braking voltage of the N-way yaw motor includes:

Obtain the electromagnetic brake voltage of N-way yaw motor during operation;

Compare whether the electromagnetic brake voltage of the N-way yaw motor changes synchronously,

If it does not change synchronously, the operation is abnormal, and the asynchronous yaw motor is marked;

If it changes synchronously, turn off the N-way yaw motor at the same time, obtain the electromagnetic brake voltage of the N-way yaw motor when it stops running, and compare whether the N-way yaw motor electromagnetic brake voltage stops synchronously.

If the synchronization stops, the N-way yaw motors of this group are all running normally;

If it stops asynchronously, the operation is abnormal, and the yaw motor that stops asynchronously is marked.

The present invention compares the electromagnetic brake opening time and the action sequence of the yaw motor, so as to realize the optimization of the electromagnetic brake action of the yaw motor of the yaw system.

Wherein, the step of judging the synchronous change of N-way yaw motor power includes:

Obtain the voltage and current of the N-way yaw motor, and calculate the power of the N-way yaw motor;

Compare whether the power of the N-way yaw motor changes synchronously,

If the synchronization changes, the N-way yaw motors of this group are all running normally, and the running test is over;

If it does not change synchronously, the operation is abnormal, mark the yaw motors that are not synchronous, and stop running the group of yaw motors.

In addition to judging whether the operation of each yaw motor is normal, the present invention also captures the real-time running state of the yaw motor by capturing and recording the synchronization of the electromagnetic brake voltage of the yaw motor when it runs and stops running. , 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 judged whether there is a yaw motor in this group of wind turbines during operation. The phenomenon of uneven load, and according to the obtained data, adjust the process in time to avoid damage to a yaw motor with a large load for a long time, thus affecting the long-term stable operation of the overall yaw motor of the wind turbine.

In this embodiment, the method further includes, before comparing whether the yaw operation detection parameters of the N circuits of yaw motors change synchronously, comparing the current values of the N circuits of yaw motors with a preset standard current value,

If it is greater than the preset standard current value, stop this running test, and mark the yaw motor that is greater than the standard current value;

If it is not greater than the preset standard current value, continue to the next step.

Before the synchronization detection of the whole group of yaw motors is performed, the present invention also includes the step of pre-screening the yaw motors with obvious abnormal operation. Yaw motor with motor current protection threshold can save time and improve screening efficiency.

In this embodiment, it also includes the step of saving the yaw running detection parameters after the running test is finished;

Among them, 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 the change curve of the yaw operation detection parameters.

The present invention stores the yaw running detection parameter results of each running test, which can be used as a reference standard for subsequent tests, and draws the change trend diagram of the yaw running detection parameters for the abnormal yaw motor, and observes its appearance. The abnormal development trend should be predicted in advance and adjusted in time, and the yaw system should be further optimized according to the change results.

In this embodiment, the control method for simultaneously turning on or off the N-way yaw motors of the wind turbine includes:

The main control device turns on the yaw inverter, and the yaw inverter directly sends start and stop commands to the yaw motor;

Or the main control device sends start and stop commands to the control module, and the control module controls the contactor and relay to turn on or off the yaw motor.

As shown in Figure 2, the present invention provides a yaw motor synchronization detection system for wind turbines, including:

The main control device 100 is used to turn on the N-way yaw motors of the wind turbine at the same time, and the yaw motors receive electric energy to start the running test;

The synchronous acquisition module 110 is used to acquire the yaw operation detection parameters of the N yaw motors;

The synchronization analysis module 120 is configured to compare whether the yaw operation detection parameters of the N-way yaw motors change synchronously or stop changing synchronously.

In this embodiment, the synchronous acquisition module 110 includes:

The synchronous measurement unit is used to measure the electromagnetic brake voltage when the N-way yaw motor starts, the electromagnetic brake voltage when the N-way yaw motor stops running, and the voltage and current when the N-way yaw motor is running;

The synchronous calculation unit is used to calculate the running power of the N-way yaw motor according to the voltage and current.

The present invention provides a yaw motor synchronization detection system for wind turbines. The main control device 100 controls the yaw motor to start and stop running, and a synchronous acquisition module 110 is set to capture the real-time yaw operation detection parameters of N yaw motors. And set the corresponding synchronization analysis module 120 to continuously capture and record the collected real-time yaw motor state data, so as to realize the optimization of the motor current of the yaw system, the electromagnetic braking action of the yaw motor, etc., and determine whether there is a yaw motor. Uneven load phenomenon.

The wind turbine yaw motor synchronization detection system provided by the present invention can monitor the initial running state, the running state and the stopped running state of the yaw motor in all aspects, that is, the detection of the whole group of yaw motors in the whole operation process, The monitoring has a wide range, comprehensive coverage, and accurate detection. It can precisely locate and adjust the abnormal yaw motor of each road, so as to avoid the operation failure of the wind turbine as much as possible and ensure its long-term stable operation.

In this embodiment, a comparison module 130 is further included, for comparing the current value of the N-way yaw motor with the preset standard current value before comparing whether the yaw operation detection parameters of the N-way yaw motor change synchronously mark, you can quickly filter out the yaw motor with excessive load and exceeding the current protection threshold of a single motor.

In this embodiment, a storage module 140 is also included, which is used to save the yaw operation detection parameters after the running test, and draw the change curve of the yaw operation detection parameters, so as to facilitate subsequent fault diagnosis of the yaw motor and system optimization. Provide accurate data support.

In this embodiment, the control device for simultaneously turning on or off the N-way yaw motors of the wind turbine includes a yaw frequency converter, which is used to directly send start and stop commands to the yaw motors;

Or a control module, configured to receive the start and stop commands sent by the main control device 100, and control the contactor and the relay to turn on or off the yaw motor.

As shown in Figures 3 and 4, the specific implementation steps of the preferred embodiment of the present invention are as follows:

Start the oscilloscope or similar functional instrument and start recording the electromagnetic braking voltage of the motor; start the power analysis and record the working power and current of the motor, start the upper computer software and set the standard current value, and collect the electromagnetic braking voltage of the yaw motor at this time;

The main control system turns on the inverter or the contactor, the electromagnetic brake of the yaw motor is energized, the yaw motor receives the electric energy, and the oscilloscope or similar functional instrument captures the electromagnetic brake voltage;

The yaw motor starts to work after receiving the power change. The oscilloscope or similar functional 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 will send an alarm signal. If it runs synchronously, continue next step;

The power analyzer starts to run and collects current and power, compares it with the set standard current value, and marks the data of a certain yaw motor that is unqualified in red;

The power analyzer compares the power synchronization of N motors. If it is not synchronized, the alarm module will send an alarm signal. If it is running synchronously, continue to the next step;

The main control system controls the inverter or the contactor to turn off the yaw motor to stop running. The oscilloscope or similar functional 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 will issue an alarm signal. If it runs synchronously, continue to the next step;

The storage module automatically saves data;

The main control system controls the programmable logic controller to turn off the inverter or the contactor, and the synchronization detection ends. The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art who is familiar with the technical scope disclosed by the present invention can easily think of changes or substitutions. Included within the scope of protection of the present invention.

Claims (10)

1. A method for detecting the synchronicity of a yaw motor of a wind turbine, comprising the following steps: At the same time, the N-way yaw motor of the wind turbine is turned on, and the yaw motor receives the electric energy and starts to run the test, where N is a natural number greater than 1; Obtain the yaw operation detection parameters of the N-way yaw motor, wherein the yaw operation detection parameters include the electromagnetic brake voltage when the N-way yaw motor starts and the power of the N-way yaw motor when it is running; Compare whether the yaw operation parameters of the N-way yaw motors change synchronously. If they do not change synchronously, the operation is abnormal, and the asynchronous yaw motors are marked; If it changes synchronously, obtain the electromagnetic braking voltage of the N-way yaw motor when it stops running, and compare whether the electromagnetic braking voltage of the N-way yaw motor stops changing synchronously when it stops running. If the synchronization stops, the N-way yaw motors of this group are all running normally; If it stops asynchronously, the operation is abnormal, and the yaw motor that stops asynchronously is marked. 2 . The method for detecting synchronization of yaw motors of wind turbines according to claim 1 , wherein the obtaining the power of N-way yaw motors during operation comprises: 2 . Measure the voltage and current of the N-way yaw motor when it is running, and calculate the power of the N-way yaw motor when it is running according to the voltage and current. 3. A method for detecting synchronicity of yaw motors of wind turbines according to claim 2, wherein, before comparing whether the yaw operation detection parameters of N-way yaw motors change synchronously, the measured N-way yaw motor The current value of the aircraft motor is compared with the preset standard current value, If it is greater than the preset standard current value, stop this running test, and mark the yaw motor that is greater than the standard current value; If it is not greater than the preset standard current value, continue to the next step. 4. The method for detecting the synchronicity of a yaw motor of a wind turbine according to any one of claims 1, further comprising saving the yaw operation detection parameters of the yaw motor after the running test is finished; Among them, 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 the change curve of the yaw operation detection parameters. 5 . The method for detecting synchronization of yaw motors of wind turbines according to claim 1 , wherein the control method for simultaneously turning on or off the N-way yaw motors of the wind turbines comprises: 6 . The main control device turns on the yaw inverter, and the yaw inverter directly sends start and stop commands to the yaw motor; Or the main control device sends start and stop commands to the control module, and the control module controls the contactor and relay to turn on or off the yaw motor. 6. A wind turbine yaw motor synchronization detection system, characterized in that, comprising: The main control device (100) is used to simultaneously turn on the N-way yaw motors of the wind turbine, and the yaw motors receive electric energy to start the running test; a synchronous acquisition module (110) for acquiring yaw operation detection parameters of N-way yaw motors; A synchronization analysis module (120), configured to compare whether the yaw operation detection parameters of the N-way yaw motors change synchronously or stop changing synchronously. 7 . The system for detecting synchronicity of yaw motors of wind turbines according to claim 6 , wherein the synchronous acquisition module ( 110 ) comprises: 7 . The synchronous measurement unit is used to measure the electromagnetic brake voltage when the N-way yaw motor starts, the electromagnetic brake voltage when the N-way yaw motor stops running, and the voltage and current when the N-way yaw motor is running; The synchronous calculation unit is used to calculate the running power of the N-way yaw motor according to the voltage and current. 8 . The yaw motor synchronization detection system of a wind turbine according to claim 7 , further comprising a comparison module (130) for comparing whether the yaw operation detection parameters of the N-way yaw motors are synchronized. 9 . Before changing, compare the current value of the N-way yaw motor with the preset standard current value. 9 . The yaw motor synchronization detection system for a wind turbine according to claim 6 , further comprising a storage module (140) for storing the yaw motor yaw motor after the running test is completed. 10 . The yaw operation detection parameters are drawn, and the yaw operation detection parameter change curve is drawn. 10 . The yaw motor synchronization detection system of a wind turbine according to claim 6 , wherein the control device for simultaneously turning on or off the N-way yaw motors of the wind turbine comprises: 10 . Yaw inverter, used to directly send start and stop commands to the yaw motor; Or a control module, used to receive the start and stop commands sent by the main control device, and control the contactor and relay to turn on or off the yaw motor.

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