Study on AGC Control System Optimization of Ultra Supercritical Unit

In order to solve the control problem such as the main steam temperature and other parameters ragulation of a 600MW supercritical unit fluctuation in AGC control mode, which results in the limitation of AGC load changing rate and frequent overtemperature of main steam temperature, Through analysis and research of the control strategy and regulation data of the unit, it is found that there are inappropriate defects and hidden perils in the control strategy of the unit. According to the actual equipment situation of the unit, we put forward some strategy of optimization control logic such as coal-water decoupling, dynamic parameter compensation and fuel advance instruction adaption and implemented, then the AGC control performance has been greatly improved, the quality indexes of all main parameters of the unit have reached excellent level, and the economic and safety effects on the unit are significant. This paper introduces this project from the aspects of strategy analysis, causes of problems, strategy optimization and so on, which has reference significance for the optimization of similar units.