About xinjiang poplar river wind fan engine room fire situation

About xinjiang poplar river bulletin 2019 - wind fan engine room is on fire 06 - 24 a, accident after 2018 when 04 09 August 8 points, poplar river average temperature is 34 ℃, wind environment to the 17 m/s average wind speed, full load of 72 mw, found B8 - the duty personnel on duty 311 fans' gear oil low pressure failure alarm downtime, and zero load, and then to the B8 - Confirmed 311 fan alarm monitor background. 04 22 points, B8 - 311 fans at ambient temperature PT100 fault, engine room temperature PT100, impeller rapid switch, such as fault, monitoring the background pop-up and voice alarm, the personnel on duty in 46 points view B8-7 311 fan fault stack, they found the fault message. 07 when 50 points, to repair the monitor fan failure notice, 10 20 points in the maintenance personnel to the scene found B8 - 311 wind engine hood has been burned, disconnect B8 - immediately 311 cases of low voltage side circuit breaker, and operations, head of the report. 10 55 points, when the terminal head B8 - such as arrived Fan 311 view, confirm the cabin burned, section and the tower drum blade root burns. Second, the cause of the accident by the analysis of the cause is: the fan main shaft bearing in the process of operation failure occurs, the inertia of the unit and sustained fan continues to run under the action of external wind speed, bearing inner and outer ring with roller and cage friction produced by high temperature lubricating grease was lit, in areas such as the fire spread to the gear box, generator, gear box, generator, etc. Due to the 750 kw the aircraft wind generating set design, production years earlier ( The first unit in September 2003) Spindle system, no effective monitoring measures such as temperature, vibration; This type of spindle system is maintenance free product, and the missile d etection, inspection check only the filling oil, unable to open the front and back end cover internal operation, check the main bearing wear condition, such as the main bearing failure after fans continue to further expand turn eventually led to the event. Three, exposed the problem ( A) 'To prevent power production accident of 25 important requirements to prevent wind turbine are calling for the fire accident does not reach the designated position, not to fan the cabin fire alarm and fire fighting equipment, failed to discover and control the fire in the first time, lead to fire expanding; （ 2) Hidden perils in risk classification control and governance in solid enough, insufficient understanding of the possible causes of the fan is on fire risk, analysis does not reach the designated position, failed to fan out of main bearing failure of the safe hidden trouble, lead to hidden trouble failed to get effective governance, leading to the fire; （ 3) Fan missile d etection maintenance work does not reach the designated position, not the screen presence of axial fan spindle channeling, fan main bearing overflow oil grinding grain, iron filings, gear box elastic deformation, the phenomenon such as sinking, fan main bearing wear and so on into the missile d etection range; （ 4) The fan operation, state and fault recording data monitoring, analysis does not reach the designated position, not the first time found that the fan running condition is unusual, lead to accidents. Four, job requirements ( A) To extrapolate, strengthen the equipment operational management, strengthening technical analysis work, corresponding technical measures are taken, avoid similar accident; （ 2) Strictly carry out the job of production safety responsibility at all levels, strictly implement the prevent power production accident of 25 important requirements to prevent the wind generating set on fire accident, improve the fan fire alarm and fire extinguishing measures as soon as possible; （ 3) Solid risk grading control and hidden governance, full screen with type fan, eliminate safety hidden danger in time, to ensure the safe and stable operation of the same type fan. （ 4) Strengthen the equipment maintenance management, improve the fan missile d etection standard, perfecting the missile d etection, prevent the fan running in spite of illness. Focus on strengthening the fan cable joint bearing, generators and other important parts of the check; （ 5) Strengthen the wind field operation management, improve the monitoring level of important data, analyzing the alarm to strengthen, to real-time monitoring of key fan, fan running condition is unusual, can ensure that the first time found in a timely manner to eliminate equipment defects, guarantee the fan long-term health. Pictures are as follows: ( Source: the electric power production safety)