核电常规岛给水除氧器水位控制系统建模与仿真

Modeling and Simulation of Tuning Adjustment on the Control System for the Water Level in the Water Feeder Deaerator of the Conventional Island

通过对核电常规岛的给水除氧器水位对象的机理建模,采用仿真分别对单冲量和三冲量的控制策略进行控制参数的整定,并对其控制品质进行分析比较。根据某工程热平衡图建立的除氧器输入输出介质关系,并通过凝结水阀门进行除氧器水位控制。针对除氧器水位控制中对象的滞后,大惯性,时变性的特性,运用串级三冲量给水控制对其进行变动负荷下的仿真研究,通过与传统的PID控制比较。

In this paper, by modeling of the mechanism of the water level object in the water level object of the conventional island of a nuclear power plant, setting of the control parameters is made by means of simulation for the single-impulse control and three impulse control strategies respectively, and the control qualities are analyzed and compared. According to the deaerator input/output media relation as established by the heat balance plan for a certain project, the water level of the deaerator is controlled through the condensation water valve. For the characteristics of the delay, large inertia, time variability of the control object, simulation studies are conducted under changing loads by means of the cascade three-element water feeding control system, comparison being made to the traditional PID control.