Multi Model Robust PID Control of Main Steam Temperature based on Gap Metric

Abstract

In order to adapt to the current construction of smart power plants, thermal power plants put forward higher requirements for the main steam temperature control. The traditional cascade PID control scheme is difficult to achieve satisfactory control quality. In this paper, several models of the main steam temperature plant are classified according to the gap metric, and then the corresponding robust PID controller is designed for different models. The simulation results show that the multi model robust PID control based on gap metric can effectively solve the large delay and nonlinearity of the main steam temperature plant, and the control performance is better than the cascade PID control, which is worth popularizing in engineering application.