GB/T 25386.2-2021Wind turbines—Control system—Part 2: Test method (English PDF)

5.1 General inspection

Check whether the electrical design and process of the control system meet the requirements of GB/T 50054, GB 7251.1 and GB/T 20626.1, and comply with Comply with the provisions of Chapter 10 of GB/T 18451.1-2012.

5.2 Equipment safety

5.2.1 Protection circuit effectiveness test

The effectiveness test of the protection circuit shall be carried out in accordance with the method specified in 4.4 of GB/T 10233-2016.

5.2.2 Degree of protection

The protection level test should be carried out in accordance with the methods specified in Chapter 13 and Chapter 14 of GB/T 4208-2017.

5.3 Insulation test

5.3.1 Dielectric performance test

The test of dielectric properties should be carried out in accordance with the method specified in 4.5 of GB/T 10233-2016.

5.3.2 Insulation resistance test

The insulation resistance measurement should be carried out in accordance with the method specified in 4.6 of GB/T 10233-2016.

5.4 Electromagnetic compatibility test

5.4.1 Ringing wave immunity test

The ring wave immunity test should be carried out in accordance with the method specified in GB/T 17626.12.

5.4.2 Electrostatic discharge immunity test

The electrostatic discharge immunity test shall be carried out in accordance with the method specified in GB/T 17626.2.

5.4.3 Radio frequency electromagnetic field radiation immunity test

The radiated electromagnetic field immunity test should be carried out in accordance with the method specified in GB/T 17626.3.

5.4.4 Electrical fast transient pulse group immunity test

The electrical fast transient pulse group immunity test should be carried out in accordance with the method specified in GB/T 17626.4.

5.4.5 Surge immunity test

The surge immunity test should be carried out in accordance with the method specified in GB/T 17626.5.

5.4.6 Conducted disturbance immunity test induced by radio frequency field

The conducted disturbance immunity test induced by the radio frequency field shall be carried out in accordance with the method specified in GB/T 17626.6.

5.5 Mechanical performance test

5.5.1 Vibration test (sinusoidal)

Sweep at a rate of one octave per minute in accordance with the frequency range and amplitude specified in 4.7.1.1 of GB/T 25386.1-2021 Frequency, detect the resonance frequency of each axis, at each dangerous frequency point, in accordance with the frequency range specified in 4.7.1.2 of GB/T 25368.1-2021 Vibration resistance test is performed on the enclosure and amplitude, and the structural frequency of the control cabinet is determined through the frequency sweep test.

5.5.2 Impact test

The impact endurance test should be carried out in accordance with the method specified in GB/T 2423.5. The test objects include the engine room control cabinet and its supports.

5.6 Low temperature performance test

The low-temperature operation test shall be carried out in accordance with the test Ad specified in GB/T 2423.1-2008. When the test temperature is the lower limit of the working temperature and is stable After setting, the control system is energized and started to run (the product is powered on and the running time does not exceed 2h), and the continuous running time is 2h. Pass at low temperature During electrical operation, the input and output signals in the control system should be tested. At the end of the test duration, first power off the control system, and then The temperature of the test box slowly rises to within the temperature deviation range of the test standard conditions, and the temperature change in the test box should not exceed 1k/min (not more than 5min average). After the test, the control system is energized to start operation, and check whether the input and output functions of the control system are normal.

5.7 High temperature performance test

The high temperature operation test shall be carried out in accordance with Test Bd specified in GB/T 2423.2-2008. When the test temperature is the upper limit of the working temperature and is stable After setting, the control system is energized to start operation, and the continuous operation time is 2h. During high-temperature power-on operation, respond to the input and output in the control system The signal is tested. At the end of the test duration, first power off the tested system, and then slowly reduce the temperature of the test chamber to the temperature of the test standard conditions.

Within the range of degree deviation, the temperature change in the test box should not exceed 1k/min (not more than the average value of 5min). Check and control after the test Whether the input and output functions of the system are normal.

5.8 Humidity and heat performance test

5.8.1 Constant damp heat test

The constant damp heat test should be carried out in accordance with the test method specified in GB/T 2423.3. The control system is placed in the test box without packaging and no electricity Inside, in the test chamber temperature (40 ± 2) °C, relative humidity (93 ± 3)% conditions, the duration of 48h. The phase should be restored within 0.5h during recovery.

The humidity is reduced to 73%~77%, and then the temperature is adjusted to the laboratory temperature within 0.5h. After the test, the insulation resistance should not be less than 0.5Mohm, the dielectric performance should meet the requirements specified in 4.6.2 of GB/T 25386.1-2021.

5.8.2 Alternating damp heat test

The alternating damp heat test shall be carried out in accordance with the test method 1 specified in GB/T 2423.4-2008. The control system is unpackaged and placed without electricity In the test box, the temperature of the test box changes cyclically between (25±3)°C and (55±2)°C, and the number of cycles is 2 times. After the test, the insulation resistance should be tested Not less than 0.5Mohm, the dielectric performance should meet the requirements specified in 4.6.2 of GB/T 25386.1-2021, and the measurement should be performed after the end of the recovery period.

The measurement of all parameters should be completed within 0.5h after recovery.

5.9 Mold growth test

According to the test method 1 in GB/T 2423.16-2008, the culture period is 28 days. The test sample is not packaged and not energized. test The test results should meet the requirements specified in 4.11 of GB/T 25386.1-2021.

5.10 Salt spray test

According to the severity level 2 in GB/T 2423.18-2012, it includes. 3 spray cycles, each cycle 2h, each spray cycle After that, there is a damp and heat storage period of 20h-22h. The test sample is not packaged and not energized. The test result meets GB/T 25386.1- Requirements specified in 4.12 in 2021.

5.11 Operation monitoring function test

5.11.1 Data acquisition and processing function test

When simulating key signal changes, check the correctness of the collected data through the monitoring interface to verify the data collection and processing functions of the control system. The correctness and reliability of performance.

5.11.2 Basic monitoring function test

Through the monitoring interface, check whether the control system can monitor the operating status of the unit, the external environment and the grid status in real time, and trigger the machine through simulation.

Group related faults, verify whether the control system protection meets the requirements of 5.2.2.2 in GB/T 25386.1-2021.

5.11.3 Human-computer interaction test

View the current operating status, parameters, user permissions and status of each subsystem of the unit on the human-computer interaction interface, browse fault information and Modify parameters, etc., and check whether it meets the requirements of 5.2.2.3 in GB/T 25386.1-2021.

5.11.4 Accident and failure information recording test

Simulate trigger unit accidents or failures, and check whether the control system can correctly record the corresponding information through the monitoring interface.

5.11.5 Data continuous recording function test

Simulate the triggering of the unit failure, and check whether the continuously recorded data meets the requirements of 5.2.2.5 in GB/T 25386.1-2021 through the monitoring interface Claim.

5.11.6 Data statistics function test

Check whether the statistical data meets the requirements of 5.2.2.6 in GB/T 25386.1-2021 through the monitoring interface.

5.11.7 Maintenance status test

Check whether the maintenance function meets the requirements of 5.2.2.7 in GB/T 25386.1-2021 by flipping the maintenance switch of the control cabinet.

5.12 Coordinated control test of converter

This part can use ground simulation test or field test. When using simulation test, the converter should be a real object.

Under the normal working state of the control system, observe the power-on, power-off and torque demand issued by the control system by the converter through the monitoring interface Commands such as given values, as well as information such as generator speed and generator electromagnetic torque fed back to the control system, verify whether the interface and functions are correct Often, the test results should be able to meet the requirements of 5.2.3.1 in GB/T 25386.1-2021.

5.13 Coordinated control test of pitch system

This part can use ground simulation test or field test. When using simulation test, the variable pitch system should be a real object.

In the normal working state of the control system, observe the pitch system receiving the blade position and control issued by the control system through the monitoring interface Words and other instructions, as well as the current blade actual angle and state machine feedback to the control system, check whether the interface and function are normal, test The result should be able to meet the requirements of 5.2.3.2 in GB/T 25386.1-2021.

5.14 Start grid connection test

This part can use ground simulation test or field test. When using simulation test, the converter should be a real object.

When the unit is fault-free, check whether the control system has a start-up condition detection process through the monitoring interface, and when the start-up conditions are met, press Start the units separately according to the start mode in 5.2.3.3 of GB/T 25386.1-2021, and verify whether the control system can automatically coordinate and control the pitch The distance between the system and the converter completes the grid connection of the unit and enters the power generation state. The test results should meet the requirements of GB/T 25386.1-2021. The requirements of 5.2.3.3.

5.15 Variable speed control test

This part can use ground simulation test or field test.

After the unit is connected to the grid, when the wind speed changes between the cut-in wind speed and the rated wind speed, the control system coordinates the control of the pitch system and the converter.

Through data recording and analysis, whether the wind speed-power curve or torque-speed curve is consistent with the optimal curve.

5.16 Constant power control test

This part can use ground simulation test or field test.

After the unit is connected to the grid, when the wind speed changes between the rated wind speed and the cut-out wind speed, the control system coordinates the control of the pitch system and the converter.

Through data recording and analysis, whether the output power can be maintained within ±10% of the rated power.

5.17 Shutdown process test

Field test should be used for this part.

Shutdown usually includes one or more of normal shutdown, quick shutdown and emergency shutdown.

When the wind speed changes between the cut-in wind speed and the rated wind speed, various types of shutdown behaviors designed by the unit are triggered, and the unit is detected and recorded The dynamic process of wind speed, generator speed, pitch angle, grid-connected point voltage, current, active power and operating state machine, the sampling period is not greater than 0.1s, the recording time meets the requirements of the corresponding technical specifications, and the test results should meet the requirements of 5.2.3.5 in GB/T 25386.1-2021.

5.18 Yaw control test

5.18.1 Manual yaw control test

Operate the left yaw and right yaw function keys to execute the yaw action, and verify whether the yaw direction is consistent with the required direction.

5.18.2 Automatic yaw control test

When the yaw system, anemometer and wind direction indicator are all fault-free, when the wind speed is greater than the minimum wind speed required for yaw start, manually Yaw, so that the wind deviation meets the requirements of automatic yaw and stop manual yaw. At this time, the crew should perform automatic yaw and check the automatic yaw direction and Whether the wind accuracy meets the requirements.

5.18.3 Yaw priority test

In the cabin yaw state, operate the tower base yaw function key and the remote yaw function key respectively, and the crew should only perform the cabin yaw operation;

In the tower bottom yaw state, operate the remote yaw function key, and the crew should only perform the tower bottom yaw operation; in the tower bottom yaw state, operate the cabin yaw power Yes, the crew should only perform cabin yaw operations. During the automatic yaw process, operate the cabin yaw function key, the tower base yaw function key or the far The control system should stop the automatic yaw action and execute the corresponding manual yaw action.

5.19 Unmooring control test

This part can use ground simulation test or field test.

When the yaw is fault-free and the wind speed is greater than the minimum wind speed required for yaw start, manual yaw is used to make the twisting angle greater than the automatic untwisting angle Stop manual yaw and switch to automatic yaw state. At this time, the crew should perform automatic unmowing and analyze whether the twisting angle is correct after unmowing is completed. Combined unit design requirements.

5.20 Offshore crew control test

5.20.1 Redundant function test

According to the design description of the unit, in the power generation operation state of the unit, the module that declares the redundancy function for the unit, artificially triggers the redundancy Function, observe whether the performance of the unit conforms to the design specification, whether the redundant function can be automatically activated, and whether the redundant equipment abnormal warning message is reported.

5.20.2 Remote fault diagnosis test

According to the design description of the unit, when the unit is in the power generation operation state, the number of targeted faults is artificially created through the remote system observation.

According to whether it can meet the requirements of accurately locating the fault location, determining the fault status of the unit, and determining the feasibility of resetting.

5.20.3 Remote control function and permission test

According to the design instructions of the unit, in the power generation operation state of the unit, it is tested whether different permissions can only perform remote control functions of the corresponding permissions.

Yes, test whether the response of various remote control functions meets the design requirements.

5.20.4 Remote safety chain reset test

According to the design instructions of the unit, under different levels of remote control authority, test whether the safety chain fault reset function meets the requirements The requirements of 5.2.3.8 in GB/T 25386.1-2021.

5.21 Distributed unit control test

The simulation platform can be used for testing, or on-site testing can be used.

When the unit is in the power generation state, it encounters unplanned islands, and observe whether the wind turbine can quickly identify the islands and carry out effective protection Action, unplanned islanding protection function test method can be in accordance with 6.8.2 of NB/T 33011-2014.

Detect and record the dynamic process of unit wind speed, generator speed, grid-connected point voltage, current, frequency, phase and operating state machine, sampling cycle The period is not more than 0.1s, including 10s before islanding to 30s after islanding, analyze whether the results meet the design requirements.

When the unit is in the power generation state, the droop curve relationship of the unit's active power-frequency and reactive power-voltage can be changed remotely to make the unit In the operating mode of tracking this curve, observe the active power sum of the unit in pursuit of frequency and voltage dynamic stability before and after changing the parameters.

Reactive power situation. Detect and record wind speed, generator speed, active power, reactive power, grid frequency, grid-connected point voltage, and the sampling period is not More than 0.1s, can collect 5 continuous 5min data fragments under different wind speed conditions, and analyze whether the results meet the design requirements. except In addition to changing the setting parameters in the remote mode, perform another test with the local setting of the curve relationship. During the ground simulation test, the electricity can be changed artificially. Network frequency and voltage are observed.

When the unit is in the power generation state, the limit value of the current change slope of the unit can be changed remotely, so that the unit can track the slope.

Formula, observe before and after changing the parameters, the unit's active and reactive power under the pursuit of the slope of current change. Detect and record wind speed, Motor speed, active power, reactive power, grid frequency, grid-connected point voltage, the sampling period is not more than 0.1s, can be collected under different wind speed conditions