IEEE 1834-2019 pdf free.IEEE Standard for Technology Supervision Code for Wind Turbine Rotor Systems.
In the adjustment process. the insallation angle ofthc blades shall be inspected, and verified that ills within the range from the supplier. The installation angles of blades of wind-turbine generator system shall be consistent.
Blade supervision items to be implemented every year are as follows:
Inspect (he blade rotating noise emission, there should not be any abnormal noise or whistling, etc.
Inspect the surface of blade. There should not be stains, corrosion, air bubbles, crystallization, or trace of lightning strike. etc.
Inspect the surface of blade There shall not be chaps, injuries, voids, or peeling on the surface of blades. Mark all cracks and damages. etc.
Inspect inside the blade. It should be dry, the drain holes shall not be blocked, the inner surface and the web shall not be deformed, peeling, or Contain foreign objects.
Inspect the lightning receiver on the tip and in the middle of the blade. It should be in good condition and should not be deformed or blackened. The blade body should not be blackened, cracked, deformed. or debonding. The connecting cables of lightning receiver shall net be loose or separated from the component.
Inspect the action of lightning record. Record the peak current if any action.
Inspect the dc resistance between lighting receiver and blade root flange. It is necessary to test three times for each position and take the average. The resistance value shall not be larger than 0.O5i
Once internal defixts in blades are found visually, non-destructive testing should be taken to inspect the blades. the testing method suggested are ultrasonic flaw detection, infrared imaging. etc.
When the WT(IS has operate for over three years, then the following supervision should be implemented every two years:
(‘lean the stain on the blades.
Inspect whether ihe blade surface is cracked, the blade trailing edge is split, the blade tip is worn, or the leading edge is worn, and repair if so.
6. Hub supervision
Before delivery, the manufacturer shall provide the ex-factory inspection certificate, acceptance record sheet, material spectral analysis report. non-destructive inspection report, finite element analysis report, mechanical performance report, dimensional inspection report, and other documents of the hub. The data of hub detection shall meet the requirements of ISO 4992. and ultrasonic non-destructive tests should follow EN I 26O-3:2O 12.
Before the bolt installation, quality reports including compliance certificates, acceptance record sheets, and inspection reports, etc., shall he inspected. The results should meet the requirements of EN 14399:2005.
Atler the WTGS is put into operation for one month or 500 h (adopting the first reach time), the preload torque value shall be inspected. Verify that the preload torque value of connecting bolts between blades and hub comply with the requirements of the product supplier.
When the WTGS is put into operation for three months, all the connecting bolts torque of each part shall be flistened.
Supervision items to be implcmcntcd every six months arc as follows:
Inspecting hub and hub cover. The surtice shall be clean, free from cracks, no peeling ut antiseptic paint, and scalings in good condition. The hub nose shall connect well and be in the normal position.
Random quality inspection of bolt torque. Sampling rate shall be over 10% and the pass rate shall be 100%. If any bolt preload torque does not meet the value set by the equipment supplier, all bolts shall be inspected, lithe failure rate from all inspected bolts is equal or more than 30%, non-destructive test should be implemented on bolts connecting hub and blade, hub and main shalt, and replace those in risk.
Afler operating over four years. a fatigue test shall be implemented on the connecting bolts between the hub and blades, and between the hub and the main shall every three years. A non-destructive test should be implemented on the pitch bearings. The bolt tests shall be earned out in accordance with EN 14399:2005 and ultrasonic non-destructive tests should be carried out in accordance with ISO 4992-1:2006. The sampling rate at the same position of each WTGS shall not be lower than 2%, and the passing rate shall be 100%. Ii any problem is found, all bolts at the same position of each WTGS shall be replaced.
7. Pitch system supervision
7.1 General supervision items on pitch system
Pitch system can be classified to hydraulic pitch system and electric pitch system based on the control principles.
The following supervision items shall be implemented before installation:
The ring gear and gear shall pass the type acceptance test, including clearance test, loading lest, transmission efficient Lest, temperature rise test, vibration test, noise test, fatigue test. etc. The result should meet the requirements oilSO I 32X-l :2013 and ISO l32X-2: 1997.
Electric motor shall pass the type acceptance lest, including electrical lest. The machine shall be graded according to IEC 60034-1:2017, and the efficiency shall be test according to IEC 60034-2-1:20 14.IEEE 1834 pdf download.