新型核电机组启停及给水系统控制策略

Control Strategy of Start/Stop and Feed Water System of New Type Nuclear Power Plant

[目的]采用研究、分析和归纳的方法,得到机组启停、给水、旁路的控制策略。[方法]参考项目经验,借鉴核电常规岛和火电机组的先进设计理念,对机组工艺系统的设备进行优化,相应优化控制策略,主要考虑“机组启停和旁路系统”和“给水系统”控制策略优化。[结果]研究机组启停控制策略2个方案;给水控制策略5个方案;旁路控制策略3个方案。[结论]“机组启停控制策略”采用方案一,控制策略较简单,较方案二耦合少,经济性较合理。“给水系统控制策略”采用方案二(母管制)控制方案合理,经济性好,系统运行安全;“旁路控制策略”采用方案一,方案一经济性好,保护控制逻辑完善。

[Introduction]By means of research,analysis and induction,the control strategies of unit start/stop,feed water and bypass are obtained.[Method]Referring to the experience of the project,referring to the advanced design concept of conventional island of nuclear power plant and thermal power unit,the equipment of thermal systems of the plant would be optimized,and the control strategy of them would be optimized accordingly.It is mainly considered to the optimization of the control strategy of "startup,shutdown and bypass system" and "feed water and high-pressure heater system" in this paper.[Result]Having 2 schemes in the control strategy of unit start-up and shutdown,having 5 schemes in the control strategy of feed water and having 3 schemes in the control strategy of bypass.[Conclusion]Scheme Ⅰ of 2 schemes of "unit start stop control strategy" has been adopted,which is simpler,less coupling than scheme Ⅱ,and more reasonable in economy.Scheme Ⅱ(header control)scheme of 5 schemes of "feed water system control strategy" has be adopted,which is reasonable,economical and safe for system operation;Scheme Ⅰ of 3 schemes of "bypass control strategy" has be adopted,which is economical and has perfect protection control logic.