Mechanism Based On The Analysis Of Dynamic Characteristics Of Reheat Steam Temperature Control System State Variables

Large delay and strong inertia for thermal object, conventional PID control often can not obtain satisfactory results, especially the thermal power plant reheat steam temperature of this large delay, strong inertia and dynamic changes with the working parameters of steam temperature controlled object,and reheater outlet steam temperature control of large thermal power generating units to become an indispensable item.Based on reheater thermal parameters and structural parameters,analyzed and calculated of the gas damper thermostat mode of the dynamic characteristics of reheat steam temperature,in modern control theory "ITAE performance criteria" to carry out state feedback pole placement and observer theory is applied with high inertia of the reheat steam temperature control system to enhance the rapid response of the dynamic system and anti-jamming capability, so that improving the adaptability of the system.Thermal power of a 600WM adjustable gas damper dynamic characteristics of reheat steam temperature with observer state variable feedback - feed forward PI combined with simulation methods based on Matlab / Simulink,and validate the effectiveness and superiority.