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蒸汽发生器(Steam Generator,SG)是压水堆核电厂一回路、二回路的枢纽设备,它用来将反应堆产生的热量传递给蒸汽发生器二次侧,并防止一回路的放射性物质外泄,蒸汽发生器水位控制的好坏将直接影响核电厂的安全性和经济性。为了进一步提高SG水位的动态控制性能,在分析给水流量与蒸汽流量对SG水位产生影响基础上,把该水位控制系统看作了一个两入一出的非方系统,之后使用广义预测控制设计此非方系统的控制器。为方便工程应用,把计算得出的广义预测控制器进一步降阶为PID形式分别在典型和非典型两种工况下进行了仿真研究,结果表明,与常规的PID控制系统输出相比,该控制策略能够实时快速的跟踪期望输出,具有更强的抗干扰能力,并且易于工程实现。
Steam generator (Steam Generator, SG) is the first and second loop hub of PWR nuclear power plant. It is used to transfer the heat generated by the reactor to the secondary side of the steam generator and prevent the leakage of the radioactive material from the primary circuit Steam generator water level control will directly affect the safety and economy of nuclear power plants. In order to further improve the dynamic control performance of SG water level, based on the analysis of the effect of feed water flow and steam flow on SG water level, the water level control system is regarded as a two-in-one non-square system, and then the generalized predictive control design Non-square system controller. In order to facilitate the application of the project, the generalized predictive controller is further reduced to the PID form, which is simulated under typical and non-typical conditions respectively. The results show that compared with the conventional PID control system, The control strategy can track the expected output in real time and quickly, with stronger anti-interference ability and easy to implement.