Methods and systems for controlling turbocompressors

摘要

A method for regulating a turbocompressor to prevent surge, is described. The method comprises the following steps: providing at least one surge limit line (SLL) of turbocompressor (21); continuously determining an actual value of a corrected speed (Nc) of the turbocompressor (21); continuously determining at least a maximum admissible pressure ratio (PRmax) on the surge limit line, corresponding to the actual value of the corrected speed; continuously determining an actual pressure ratio (PR); acting upon an antisurge arrangement, if the actual pressure ratio is equal to or higher than the maximum admissible pressure ratio.