An investigation on the efficacy of classical tuning algorithm to satisfy advanced requirements: control of main steam pressure during fuel switching and load disturbances in coal fired boilers

Abstract

The direct application of classical tuning methods in determining the PID controller parameters warrants the determination of the intercept values in X-axis (designated as " L" ) and Y-axis (designated as " a " ) from the open loop step response of the output (to be controlled) with respect to input signal (to be regulated). However, for complex processes, the above procedure seemed to be cumbersome and as an alternative step the researchers usually opted for the heuristic algorithms for the determination of PID controller parameters. In this paper, the authors have identified the boiler demand signal as the input signal to be regulated to control the steam pressure of utility steam generators and derived the PID controller parameters using classical tuning algorithms. Further, it has been demonstrated that with the use of these controller parameters, the transient responses obtained during fuel switching as well as load disturbances are much better than the earlier published results.

Study on the Impact of Various Optimal Process Parameters of a 500 MW Boiler

“…An innovative method to calculate the accumulation value of the evaporator is performed [8]. The most important main steam pressure is controlled by using the novel methodology involved in the design of controller is employed for an utility boiler for both input disturbance side and output disturbance side [9]. The modified step response method is implemented in an utility boiler [10].…”

Evaluating the effect of ammonia-water dilution pressure and its density on thermodynamic performance of combined cycles by the energy-exergy analysis approach

“…In power plants, in order to achieve a convenient and improvement chemical control in a boiler of cycle system [1][2][3][4], some implementation processes are required in different parts of the boiler: pressure of dilution in the boiler [5][6] and the density of liquid [7] in the whole cycle system. This indicates that if any problem appears in any segments, whatever the conditions for the rest of the cycle system, the complete system will not work properly.…”