浮动核电站OTSG蒸汽压力线性自抗扰串级控制设计与验证  

Design and Verification of OTSG Steam Pressure Linear Active Disturbance Rejection Cascade Control for Floating Nuclear Power Plant

作　　者：张涛 石波 吴治江 郭伟 Zhang Tao;Shi Bo;Wu Zhijiang;Guo Wei(China Nuclear Power Technology Research Institute Co.,Ltd.,Shenzhen,Guangdong,518000,China)

机构地区：[1]中广核研究院有限公司,广东深圳518000

出　　处：《核动力工程》2024年第3期186-192,共7页Nuclear Power Engineering

摘　　要：浮动核电站的直流蒸汽发生器(OTSG)汽水容积和蓄热量较小,在存在外部扰动及负荷变化时,蒸汽压力波动较大,基于局部模型建立的单一工况水平下的比例-积分-微分(PID)控制器难以实现全工况范围内的良好控制。为此,基于系统辨识方法得到OTSG在不同工况下的传递函数模型,采用梯形隶属度函数进行加权,建立适用于OTSG蒸汽压力控制的全工况模糊模型,并将线性自抗扰控制器(LADRC)应用于OTSG的外回路,设计LADRC串级控制系统。结合频域分析方法给出OTSG稳态运行和变工况运行的LADRC工程参数调整规律,在此基础上进行参数整定,并与PID串级控制系统进行性能对比。仿真结果表明,相比PID串级控制,LADRC串级控制的响应速度更快、控制误差更小、抗干扰性和鲁棒性更强。The once-through steam generator(OTSG)of floating nuclear power plant has a small steam-water volume and heat storage capacity,and the steam pressure fluctuates greatly when there are external disturbances and load changes,so it is difficult for the PID controller based on the local model to achieve good control in the whole operating range.Therefore,based on the system identification method,the transfer function models of OTSG under different operating conditions are obtained.The trapezoidal membership function is used for weighting,and a fuzzy model under all operating conditions suitable for OTSG steam pressure control is established.The linear active disturbance rejection controller(LADRC)is applied to the outer loop of OTSG to form a cascade control system.Combined with frequency domain analysis method,the LADRC engineering parameter adjustment law of OTSG steady-state operation and variable-condition operation is given,and the parameters are adjusted on this basis,and the performance is compared with PID cascade control system.The simulation results show that compared with PID cascade control,LADRC cascade control has faster response speed,smaller control error,stronger anti-interference and robustness.

关 键 词：浮动核电站 直流蒸汽发生器(OTSG) 频域分析 线性自抗扰控制器(LADRC) 

分 类 号：TL353.13[核科学技术—核技术及应用] TM623[电气工程—电力系统及自动化]