核电站蒸汽发生器冲洗装置控制系统的开发

Development of Control System for SG Cleaning Device in Nuclear Power Plant

随着核电站运行和管理水平的提高,蒸汽发生器(SG)二次侧维护越来越受到重视。笔者开发的SG冲洗装置的主要部份是以PLC控制器和交流伺服电机核心组成的高精度运动控制系统。人-机操作界面采用现场操作站和遥控触摸屏相结合的方式,减少操作人员整体辐射水平。同时,该系统还具有事故工况下急停、泥渣收集和运行状态视频监视等功能。最后,提出了利用人工神经网络模型补偿冲洗手臂挠曲和系统运动控制中静摩擦力等造成的非线性影响,进一步提高系统控制精度。系统运行稳定、操作简单。

With the development of the operation and management technology in the nuclear power plant, people pay more attention to the maintenance of SG second-side. The SG cleaning device developed in this paper is a high-precise motion control system composed of PLC controller and AC servomotor. The human-machine interface incorporates the on-site operator station and the remote touch-sensitive screen, which reduces the total radiation for the operators. Moreover, this control system also has such functions as the emergency shutdown under fault condition, sludge collection and video monitor for operation status. Finally, this paper puts forward an artificial nerve network model, which compensates the nonlinear effects of the control system caused by the static friction resulted from the deflection of the mechanical arm and system motion. It can further improve the control precision. The operation of the control system is stable and simple.