Surge control in centrifugal compressor using dynamic controllers

Abstract

Compressors are of particular importance due to their widespread use in various industries for compression and gas transfer. The centrifugal compressor increases the gas pressure and temperature by increasing the kinetic energy using rotating blades. Controlling the compressor's surge phenomenon is very important because it happens very quickly and will cause damage to the compressor, electric motor drive, and the production process. This phenomenon is defined as an instability during compressor workflow and usually occurs in centrifugal compressors. Controlling the surge phenomenon is causing of the expansion the operational range of the compressor operation. In this paper, the third-order Moore–Greitzer’s dynamic model and the active control method are presented based on the back stepping and dynamic surface for controlling the surge phenomenon. The simulation results show that the controllers designed in both ways have the ability to control the compressor in the surge mode. Among the prominent innovations of the article, we can point out a structure for evaluating the back-stage controller in the case of constant increase in the centrifugal compressor and the dynamic level controller in the case of the constant increase in the centrifugal compressor. In Dynamic surface control system indicate that the scaled annulus-averaged flow is stable in 1 s and high accuracy is maintained.