摘要
单元机组被控对象本是非线性系统,本文在机理性数学模型的基础上,给出了其增量式观测器IFO-KΔAx的状态空间描述,并将基于。IFO-KΔx的状态反馈与常规PID控制相结合。采用状态反馈控制克服受控对象的时滞与惯性,提高控制系统的快速性和负荷适应能力,应用PID控制来保证受控对象的稳态指标。实践表明:IFO-KΔx对受控对象的数学模型要求不高,特别是应用于迟滞和惯性较大的受控对象时,所设计的观测器具有很好的鲁棒性。该控制方案应用于平凉电厂4X300MW单元机组的机炉协调及主汽温等控制系统中取得了优良的控制效果,其控制算法简单实用,且便于推广。
Unit generator controlled object is non-linear system. Based on the mechanism mathematical model of the unit plant, a type of incremental mode observer TFO-KΔx was described by state space in this paper. Subsequently, a new control method has been proposed that state feedback based on IFO-KΔx be combined with conventional PID control. The great inertia and time lag can be overcome and load adaptive ability can be improved by using state feedback control, and steady index was assured by using PID control. The practice shows that the IFO-KΔx has no tighter requirement to mathematical model of controlled object. The observer designed has strong steady robustness especially when it is be used in object which characteristic has great inertia and time lag. The control scheme was applied in 4X300MW unit generators of Ping Liang Power Plant. The excellent control result was acquired in boiler-turbine coordinate control and main steam temperature control systems. This control algorithm is briefness, practicality and easy to spread.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2004年第12期233-237,共5页
Proceedings of the CSEE
关键词
观测器
状态反馈控制
对象
PID控制
增量
鲁棒性
非线性系统
受控
惯性
函数
Thermal power engineering
Power plant automation
Non-linear
State observer
State feedback
Turbine-boiler coordinated control
AGC
