火电机组风烟系统智能控制模块设计与应用

Design and Implementation of Intelligent Control Function Module for Air and Flue Gas System of Thermal Power Units

风烟系统是火电机组的重要组成部分。为提高火电机组智能化水平,对风烟系统智能控制的需求进行了分析,设计了智能启动、智能运行、智能停运3大功能组及多个子功能组。各(子)功能组均采用模块化设计,能适应正常运行、检修和故障等各种工况,紧急情况下手动控制优先。仿真及现场应用表明,在无人工干预的情况下,能实现整个风烟系统启动、运行、停运全过程的自动控制,炉膛压力等重要参数控制平稳,提高了火电机组安全性能,减轻了运行人员劳动强度。

The air and flue gas system is an indispensable part of thermal power units. To improve the intelligence level of the thermal power units, the requirements on the intelligent control function module for the air and flue gas system is analyzed, and the functional groups consisting of intelligent startup, operation and shutdown as well as other functional subgroups are designed. Modular design is adopted for each functional group and subgroup, which could be adapted to various operating conditions, such as normal, maintenance, or failure eonditkms. Manual control is set to be higher priority in case of an emergency. The simulation and application results show that without any manual intervention, by utilizing the intelligent control function module the entire process of startup, operation and shutdown of the air and flue gas system ean be controlled automatically and the related important parameters such as furnace pressure are also controlled smoothly. In addition, it can improve the security level of the thermal power units and relieve the labor intensity of operators.