Research and Application of AGC Real-time Optimization Control System Based on Modern Control Technology

Considering the practical problems in 600 MW supercritical power units of Huaneng Taichang Power Plant,such as low load changing rate,large fluctuation of the key parameters and low adaption capability to the coal type change,the advanced AGC control solution scheme of the modern thermal power unit is proposed and the AGC real-time optimal control device INFIT is developed through organic integration of predictive control technology,neural network technology and adaptive control technology.The practical application shows that the INFIT can successfully raise the AGC load changing rate up to more than 2.0%/min even in the coal changing condition;besides,the fluctuation of the key parameters is decreased efficiently,including the main steam pressure,multistage steam temperature,coal feed quantity and water feed quantity,which ensure the safe,stable and efficient operation of the large thermal power unit.