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超临界水堆(SCWR)是第四代核能系统推荐堆型中惟一的水堆,其蒸汽温度受反应堆功率影响强烈,且动态具有较强的非线性,仅采用传统的比例+积分(PI)控制方法难以达到控制效果。以Canadian SCWR为研究对象,利用移动边界方法建立蒸汽温度的动态模型。基于该动态模型设计了具有前馈和反馈的混合控制系统;反馈控制采用模糊自适应PI控制。瞬态仿真分析结果表明:前馈控制能减小功率变化时蒸汽温度的波动;模糊自适应PI控制能在线调整控制参数以改善控制性能,使蒸汽温度较快达到稳定,控制效果远比传统的PI控制更好,满足超临界水堆控制的要求。
The supercritical water reactor (SCWR) is the only water reactor of the fourth generation of nuclear power system recommended reactor. The steam temperature is strongly influenced by the reactor power and has a strong dynamic nonlinearity. Only the traditional proportional + integral (PI) Control method is difficult to achieve the control effect. Taking Canadian SCWR as the research object, a dynamic model of steam temperature was established by using the moving boundary method. Based on the dynamic model, a hybrid control system with feedforward and feedback is designed. The feedback control adopts fuzzy adaptive PI control. The transient simulation results show that the feedforward control can reduce the fluctuation of steam temperature when the power is changed. The fuzzy adaptive PI control can adjust the control parameters online to improve the control performance and make the steam temperature reach a stable level quickly. The control effect is much better than the traditional PI control is better, to meet the requirements of supercritical water reactor control.