Dynamic simulation and analysis of synchronous motor starting via autotransformer
Synchronous motor of large oxygen compressor is one of the key equipment of iron and steel enterprises,which determines the reliability of energy medium supply of blast furnace and other important process flow.The starting failure problem of the synchronous motor of a 27 000 kW oxygen compressor was studied,which affected the oxygen supply of blast furnace production.This paper introduces the key modeling techniques of the motor dynamic starting simulation using ETAP software,including the motor equivalent model,the air compressor load model,the autotransformer model,and the autotransformer self voltage drop equivalent method,etc.The simulation results are analyzed,the corresponding starting strategy is proposed,and the corresponding relay setting is optimized.Furthermore,the starting failure problem of the air compressor motor has been resolved effectively.
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