核动力蒸汽发生器水位动力学特性仿真与分析

利用核动力蒸汽发生器(SG)的数学模型和Mathlab的Simulink仿真工具建立了SG水位动力学特性的仿真模型。应用该仿真模型对几种典型的反应堆运行功率下SG水位动力学特性进行了仿真计算。SG水位动力学特性的仿真分析包括不同反应堆运行功率时给水流量扰动作用下的水位动力学特性仿真分析和蒸汽流量扰动作用下的水位动力学特性仿真分析。结果表明,仿真模型准确描述了给水流量扰动、蒸汽流量扰动以及反应堆功率变化对SG水位动力学特性的影响,并正确描述了SG运行中的逆动力学效应。利用该模型可以对SG水位动力学特性进行精确的分析。

Simulation and Analysis on Dynamics Characteristic for Nuclear Steam Generator Water Level Process

The simulation model of dynamics characteristic for nuclear steam generator (SG) water level process based on Matlab was built by using mathematical model of nuclear steam generator and simulation tools in Matlab/Simulink environment. The simulation computing for the dynamics characteristic of nuclear steam generator water level process was implemented by employing the simulation model. The simulation and analysis of dynamic characteristic for the SG water level process includes three aspects, which are the effects on the feed water flow rate disturbing, steam flow rate disturbing and nuclear reactor operation power changing to SG water level process dynamic characteristic. The results show that the simulation model accurately describes the effect of feedwater flow rate disturbing, steam flow rate disturbing and nuclear reactor operation power changing on the dynamics characteristic of nuclear steam generator water level process, and represents the reverse thermal-dynamic effects correctly. The simulation model can realize the precise analysis of dynamics characteristic for the nuclear steam generator water level process.