IEEE Std 1834 pdf free download

IEEE Std 1834 pdf free download.Technology Supervision Code for Wind Turbine Rotor Systems.
7.3 Electric pitch system supervision
The following supervision items are to be implemented before installation:
Inspect pitch servo motor. The pitch angle control step shall not be more than 0.1 degrees. pitch servo motor shall change to fail-safe mode once in self failure, and when the inner hardware in the system fails, the clear failure signal shall be output. The pitch servo driver shall be able to protect pitch motors, and when electric short or open circuit failure happens, it shall be able to shut down and send the failure signal.
Inspect backup reserve power, such as secondary battery and supercapacitor, it shall be able to support full load pitch for at least three times. The power capacity, rechargeability, electric reserve, life cycle test should follow IEC 61427.
Inspect the pitching gearbox, acoustic test and vibrating test shall be implemented according to ISO 8579, and maintain the requirement.
Supervision items to be implemented every s months are as follows:
— Inspect the components in electric pitch system. All shall be clean, the sealing shall be in good condition, and the connecting cable shall be connected reliably.
Implement electrical test, including synchronization test, single blade individual pitch control, zero point, and furling calibration, etc.
— Inspect pitch control gear reducer; the oil level and noise shall be normal.
– Inspect the gear clearance between pitch control gear reducer and pitch control ring gear. The gear clearance shall comply with the technical requirement of the equipment.
Inspect the secondary battery. The surface shall be clean and free from discharging and liquid leakage. The connections of leading terminals and every cable end shall be reliable, and the vent holes shall not be blocked. The capacity uniformity should comply with the technical requirement.
Inspect the electric heater units for storage battery. The heater shall be reliably engaged and disengaged. The electric heater unit shall be enabled automatically when the ambient temperature is lower than 1 5 °C, and be disabled automatically when the ambient temperature is higher than 25 °C.
Test the super-capacitor. The super-capacitor shall verify at least two correct, complete pitch control actions when the wind turbine generator system is powered off.
— Inspect the pitch motor. Test the insulation resistance, which shall comply with the technological requirements of the equipment.
Inspect the limiting switches. The contact points shall neither be worn, scorched, nor other damages. The manual limit lever shall function well.
Inspect the pitch control slip ring. The conductivity and resistance shall comply with the technical requirement of the equipment.
Inspect the motor encoder. The rotation shall be normal, and the signal shall be correct.
Supervision items to be implemented every year are as follows:
Inspect the pitch reduction drive oil. The inspection shall follow ISO 12925-1:2018.
Inspect the toothed belt if it exists in the system. The tension of the toothed belt shall be tested and comply with the technical requirements from the equipment supplier.
IEEE Std 1834 pdf download.