IEEE 1834-2019 pdf download – IEEE Standard for Technology Supervision Code for Wind Turbine Rotor Systems.
3. Defnitions For the purposes of this document, the following terms and definitions apply. The IEEE Standards Dictionary Online should be consulted for terms not defined in this clause. 8 aging (material): The degradation of material long term properties like stiffness and strength when it is exposed to a combination of in-service loads and environments, including heat, moisture, hydrocarbons, fatigue and static loads, etc. blade: Rotating, aerodynamically active part of the rotor. The main aerodynamic component converting wind energy to enable the rotor to rotate around its shaft. blade leading edge: The forefront part of the blade, and it is the frst part of the blade that hits the wind in normal operation. blade tip: The end point of the blade away from horizontal axis of HAWT. blade trailing edge: The rearmost part of the blade. Due to aerodynamic infuence. Separation fow and buckling are easy to occur at this part. complex terrain: Surrounding terrain that features signifcant variations in topography and terrain obstacles that may cause fow distortion. cut-in wind speed V in : Lowest wind speed at hub height at which the wind turbine starts to produce power in the case of steady wind without turbulence. cut-out wind speed V out : Highest wind speed at hub height at which the wind turbine is designed to produce power in the case of steady wind without turbulence. dc resistance: The ohmic resistance of a conductor that is directly dependent on the conductor material. downwind: The direction of the main wind vector.
4. General The wind rotor system of the wind turbine generator system (WTGS) includes blade, hub, pitch system, and yaw system. The defects of hub, blade, and other components should be tested and judged by nondestructive test, and technical repair shall be made correspondingly. The surface texture, material aging, and mechanical property deterioration of the components should be inspected, and the damage status of the materials should be evaluated. If components need test in batch, the component(s) shall have the batch number and be delivered with the corresponding test report. If the component needs testing one by one, the component shall be given a unique number and be delivered with the corresponding test report. Quality confrmation shall be done before installation, which includes two main processes: manufacture and transport. The component quality test shall be done within the factory. All the components shall be packed and transported carefully, keeping the original condition. Superfcial defect and document check shall be taken before installation. The bolts shall be fastened as per the fastening torque values (process requirements) from the supplier. After the occurrence of extreme weather or wind speed, supervision frequency of the wind rotor system shall be increased according to the real condition. Icing inspection should be carried out in the weather and areas where the blades are prone to icing. After component replacement event, the replacing component shall be taken as new component till adjustment, the technical supervision frequency should be increased compared to previous assembly. Technical supervision documents shall be established and kept thoroughly. The documents shall include all records within the supervision scope in the process of installation, repair, and technical reconstruction.