协调控制系统快速响应AGC指令的设计新方法及其工程应用

自动发电控制(Automatic Generation Control,AGC)是当代电网自动控制的一项基本要求.目前参与AGC控制的火电机组存在响应速度慢等问题,使电网AGC的控制效果较差.姚孟发电有限责任公司的1号和2号300MW本生直流炉式单元机组采用了增量型状态观测器与传统PID控制相结合的协调控制方案,并采用了文章给出的AGC与CCS的接口控制逻辑,使协调控制系统中的预给煤运算等功能在AGC方式下能得以实现,从而使机组能快速响应AGC负荷指令.两台机组AGC联调试验实时趋势曲线证明了这一点.

A Novel Design Method for Rapid Response to AGC Demand of Coordinated Control System and Its Engineering Application

Automatic generation control (AGC) is an essential request of modern power system automatic control. At present, slow response to AGC load demand is a serious problem existing in thermal power units taking part in AGC, which makes the control performance of power system AGC poor. The unit one and unit two of Yaomeng Power Co., Ltd. are all once-through boiler, its boiler-turbine coordinated control system (CCS) is based on incremental state observer combined with conventional PID control, and the connection logic of CCS with AGC adopted the scheme shown in this paper. Through adopting the connection logic of CCS with AGC, the pre-add coal function can be realized in AGC mode, which assured the rapid response to AGC load demand of the power unit, and this viewpoint has been fully proved by the trend curves of AGC adjusting test of the two units.