A new PID controller tuning system and its application to a flue gas temperature control in a gas turbine power plant

In this paper, a newly developed PID controller tuning system is presented. This system has various functions to tune PID control loops including: 1) input signals generation for system identification; 2) the model transfer function estimation; 3) PID controller parameters design using the frequency region model matching method; and 4) the designed closed-loop system validation (closed-loop simulations, analysis of frequency response, etc.). This system was applied to a flue gas temperature control system in a gas turbine power plant. The results of the experiments to the actual process show that this tuning system was effective in improving controllability and reducing the time significantly for proper tuning of control loops.