基于现场运行数据的火电机组电功率与主汽压力耦合特性的系统模型辨识

摘要

基于现场运行数据采用最小二乘法对协调控制系统的被控对象进行模型辨识,获得具有耦合特征的二输入二输出的数学模型组,为协调控制系统的设计和解耦算法策略的研究提供了参考模型.通过Matlab仿真验证,该模型组与现场运行数据拟合精度满足要求,可以作为电功率和主汽压力耦合特性的系统模型.%Using least square method based on on-site data of the coordinated control system for model identification of the object, this paper get the coupling characteristics of two inputs and two outputs mathematical model of four groups, and these groups provided model reference for the design of the coordinated control system and decoupling algorithm research. Through Matlab simulation, the model groups and the production data fitting precision met the requirements, which could be used as the coupling characteristics of electric load with the main steam pressure system model.