Dynamic Investigation of Khorasan Petrochemical C-2102 Compressor Stability in Surge Avoidance Control Condition
In this research, the stability of Khorasan Petrochemical Feed Gas Compressor (C-2102) in surge avoidance control conditions with the aim of reducing energy consumption has been studied. Surge avoidance is one of the common methods to deal with the surge phenomenon, which prevents the onset of surge condition by preventing the flow drop in the suction side of compressor. In the present paper, by examining the operating conditions and performance curves of the compressor, three types of surge avoidance systems have been designed that maintain the compressor operating point at a safe distance to the surge line by measuring the operating speed, volume flow and suction pressure to the compressor. According to the results, in case the suction flow drops to 10% as a step function, the anti-surge control system prevents approaching the surge conditions, and in case the flow drop enters as a ramp function, the control system performs better and maintains the compressor operating point in the stable zone in the event of a 40% flow drop. According to the results, if the surge avoidance control system is activated, it will be possible to increase the suction pressure of the compressor, which will reduce the compressor power consumption by 20 percent.
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