摘要
针对核电站蒸汽发生器水位被控对象非线性、时变性的特点,该文采用分别以线性自抗扰和降阶自抗扰为主控制器,比例控制器为副控制器的串级控制,加入前馈控制,对各个典型工况进行分别设计。降阶自抗扰在控制效果相同的情况下,观测器带宽减小,消除了抖振现象。针对其变工况、不确定性的特点,提出了基于隶属度函数的多模型控制策略,以实现全局控制。仿真结果表明,线性自抗扰和多模型策略的结合可实现对蒸汽发生器水位的良好的全局稳定控制,且响应速度快、抗干扰能力强。
Allow for the nonlinear and time-variable distribution characteristics of water lever controlled object for steam generator in nuclear power plants,the LADRC or RADRC is designed to work as the main controller and pro- portional controller as the auxiliary regulator in the cascaded control system. Besides,in order to overcome the influ- ence of steam flow fluctuation on the water level,a feed-forward compensation is added. An independent controller is prepared for each model under different loading conditions. In the case of consistent control effect,reduce order ESO in RADRC gets small bandwidth and eliminates the chattering phenomenon. Take into account its characteristic of variable operation condition and uncertainties,the multiple model control based on fuzzy membership function is pro- posed to achieve the good global control performance. The simulation results show that,the combination of linear ac- tive disturbance rejection control with multi-model based control can achieve better global stability control perfor- mance for water level of steam generator,which is featured by fast response ,high disturbance rejection capability.
出处
《自动化与仪表》
2017年第1期46-50,共5页
Automation & Instrumentation
基金
上海市电站自动化技术重点实验室项目(13DZ2273800)
