Fault Analysis and Treatment Measures of the Low-pressure Air Compressor in Geheyan Hydropower Station
The low-pressure air system in Geheyan Hydropower Station cannot fulfill the demand during the A-level ma-intenance.Several solution schemes are proposed.The judgement time for the air compression failure of the 1#and 2#air compressors is extended to 6 minutes,so that the air compression can be completed within the judgment time.In re-sponse to the high air consumption and long operation time in the maintenance,self-provided air compressors and low-pressure air tanks are prepared to ensure the safe operation of the power plant equipment.In response to the continuous and large amount air consumption during the repair of the runner cracks,the compression air usage time at each time is controlled within 7 to 8 minutes after a communication with the manufacture,and 2 minutes pause is conducted before the air usage continues.Practical operation of the low-pressure air system for more than a month shows that the proposed measures can meet the compression air demand of maintenance and the unit braking requirement.
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