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石嘴山电厂扩建工程装机容量4×33MW.4台机组的DCS均采用TELEPERM-XP分散控制系统。机组给水控制系统为全程给水控制,采用电动给水泵及给水旁路调节阀相结合的方式来控制汽包水位。该汽包水位控制系统的特点是采用了虚假水位修正、增益补偿、备用泵联启时勺管跟踪以及失去给水泵的Runback和多个压力之间的大值差作为给水平台前、后的差压来做被调量,因而,该汽包水位控制系统PI调节器的参数容易整定,切换过程平滑无扰,控制系统的稳定性得以提高。
Shizuishan Power Plant Expansion Project Installed capacity 4 × 33MW.4 Units DCS are used TELEPERM-XP decentralized control system. Unit water supply control system for the entire feed water control, the use of electric feed water pump and feed water by-pass control valve to control the drum level. The characteristics of the drum level control system is the use of a false water level correction, gain compensation, standby pump coupling spoon pipe tracking and loss of the pump Runback and the pressure difference between the large difference as the water supply platform before and after the poor Therefore, the parameters of the PI regulator of the drum water level control system are easy to set, the switching process is smooth and the control system stability is improved.