论文部分内容阅读
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。
Based on the mechanistic mathematical model, this paper gives the state space description of the incremental observer IFO-KΔAx, and based on it. The IFO-KΔx status feedback is combined with conventional PID control. The state feedback control is used to overcome the time lag and inertia of the controlled object so as to improve the rapidity and load adaptability of the control system. The PID control is used to ensure the steady state target of the controlled object. The practice shows that the IFO-KΔx has low requirements on the mathematical model of the controlled object, especially when applied to the controlled object with large hysteresis and inertia. The designed observer has good robustness. The control scheme is applied to the control system of the boiler and the main steam temperature of the 4X300MW unit in Pingliang Power Plant and achieved excellent control effects. The control algorithm is simple and practical and is easy to popularize.