汽包锅炉的一种非线性串级控制设计  

A Nonlinear Cascade Control Design for Drum Boiler

作　　者：卓旭升[1] 周怀春[2] 杨帆[1] 秦实宏[1] 

机构地区：[1]武汉工程大学电气信息学院,湖北武汉430073 [2]华中科技大学煤燃烧国家重点实验室,湖北武汉430074

出　　处：《控制工程》2010年第S1期22-24,34,共4页Control Engineering of China

基　　金：国家自然科学基金资助项目(50636010)

摘　　要：电厂锅炉的非线性和大延迟时间常数等是影响其控制品质主要因素。针对这些问题,提出一种非线性串级控制设计方案,一方面采用非线性补偿能够抵消锅炉的非线性的影响,另一方面采用串级控制能够提高锅炉的动态响应速度。在控制设计中,选择锅炉汽包压力为副控制对象、主蒸汽压力为主控制对象构成串级控制系统。仿真研究表明,在大范围变负荷运行条件下,所设计的机组控制系统具有良好的控制品质并能够有效地提高锅炉的响应速度。Nonlinearity and large delay time constant being two major factors can downgrade the control quality of the coal-fired boiler in power plant.Aiming to the issues,a nonlinear cascade control scheme is put forward to neutralizins the nonlinearities of boiler turbine unit by using nonlinear compensator,and to speeding up the command response of boiler by constructing a boiler cascade control system.In the control design,drum pressure is regarded as the object of secondary control loop,and steam pressure is regarded as the object of primary control loop.Simulation results show that the designed coordinate control system exhibits satisfy control quality and can improve the command response speed of boiler effectively while operated over a wide range.

关 键 词：非线性串级控制 汽包锅炉 燃煤发电机组 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]