Predictive Control and Application of Performance Optimization For 600 MW Supercritical Unit

For the indicators of the variable load rate and load regulation accuracy of Jiangsu Guoxin Yangzhou Power Generation Co.Ltd.#3、#4 600 MW supercritical units failing to meet the operational requirements of Jiangsu Power Grid,a predictive control strategy for boiler heat load is proposed,which is using the predictive control technology and based on the dynamic mathematical model of coordinating the controlled process of in multiple load point set.The rate of units changing load is improved by adjusting the speed of boiler load instruction.The load accuracy compensation control technology based on the fuzzy rules is used to modify the turbine load instruction,the load deviation of unit is removed quickly and the accuracy of unit' s load is improved effectively.Practical application shows that the unit load regulation quality is improved by the new optimal control strategy,which meets the needs of power grid running.And the stability of the unit's operation is improved by reducing the fluctuations of the main operating parameters,such as the main steam pressure,main steam temperature and so on.