Shaft Speed Control of the Gas Turbine Based on Active Disturbance Rejection Control

摘要

As a clean energy engine, the gas turbine has many challenges in its shaft speed control such as strong nonlinearity and various external disturbances. However, conventional controllers such as proportional-integral-derivative (PID) controllers are not able to obtain satisfactory performance in disturbance rejection when the operating point is changing. To handle with the strong nonlinearity and reject possible disturbances more effectively, the linear active disturbance rejection controller (LADRC) is applied to the shaft speed control system of the gas turbine based on an experimental tuning procedure. Moreover, Skogestad Internal Model Control-PID (SIMC-PID) and fractional order PID (FOPID) are chosen as comparative controllers. Eventually, Monte Carlo trials are carried out and maximum sensitivities are calculated in order to test the robustness of controllers. Simulation results illustrate the advantages of LADRC in both reference tracking and rejections of different disturbances.