主汽压力偏差容忍法在大型超临界火电机组协调控制系统中的应用

Application of Main Steam Pressure Deviation Tolerance Method in Coordinated Control System of Large-Scale Supercritical Thermal Power Unit

基于中电投白城电厂协调控制逻辑,介绍大型超临界火电机组的协调控制系统,重点论述主汽压力偏差容忍法在汽机主控制系统中的应用,并分别以负荷上升阶段和负荷下降阶段为例,分析主汽压力极限偏差容忍法的工作过程。应用实践证明,压力偏差容忍法对负荷变化的反应很快,能最大程度地发挥汽机主控制系统调节功率的作用;对压力偏差有最终限制底线,不会让主汽门前压力达到不能容忍的程度,具有很好的控制效果。

： Taking the coordination control logic in Baicheng power plant of china power investment corporation （CPI） as an example, this paper introduced the coordinated control system of large-scale supercritical thermal power unit, focused on the application of main steam pressure deviation tolerance method in the turbine control system, and analyzed the working process of this method in load rising stage as well as in load decreasing stage. The practical application proved that the pressure deviation tolerance method can quickly respond the load change, maximize the ability of turbine main control system in the process of power regulating. And it provides a final limit to the pressure deviation and make sure the serious pressure control will not happen, which has good control effect.