压水堆功率调节系统动态特性仿真研究

Simulation of Dynamic Characteristics of Power Regulation System of PWR

采用SIMULINK仿真平台,建立压水堆功率调节系统的仿真模型,对其进行时域分析,分析其单位阶跃响应,验证系统的性能指标是否满足要求。同时在同一功率定值下引入阶跃和斜坡反应性扰动,采用PID控制方案研究功率控制系统的动态特性和控制效果,并对传递函数进行优化。通过计算反应性扰动下的堆功率响应,了解系统的稳定特性、调节品质和系统各环节参数对系统的影响,为功率调节系统性能改进提供了参考。系统仿真分析表明:k=0.6时调节系统不仅能很好地克服反应性扰动,又具有良好的随动特性。

Based on the simulation platform SIMULINK, a simulation model of Power Regulation System of nuclear power Reactor is built up, and by analyzing the step response, the performance of system is checked on. Under the same fixed power, step disturbance and slope disturbance of reaction are introduced into semi object - based modeling and simulation, and the influence of rod operating area and the characteristic of power regulation system are studied by using PID control, and the transfer function is optimized. By computing the power response, the system stability, regulating quality and the effect of all parts on the whole system can be obtained, thus providing a reference for the improvement of system. System simulation indicates that when k is 0.6, the close loop system not only is capable of overcoming the reactivity diturbance, but also has good fixed value follow up characteristic.