汽轮机及调节系统参数直接辨识法研究及应用

Direct Parameter Identification Method for Steam Turbine and Its Governing System

针对目前汽轮机及其调节系统传统辨识方法存在的周期长、适应性差和辨识过程冗杂等问题,提出了一种直接辨识法。该辨识方法基于"最小二乘"思想,通过数值方法求解系统仿真值与实测值之间偏差最小时所对应的非线性方程,可快速准确地获得待辨识参数值。经过实际参数辨识试验,本文提出的直接辨识法的辨识过程效率高、辨识结果准确、鲁棒性强。该辨识方法为汽轮机及其调节系统参数辨识提供了一种新型有效手段。

Since most of the traditional parameter identification methods used in the steam turbine and its governing system have the shortages of poor fitness, complicated identification process and long period, a novel identification method based on least square theory, called direct identification method, is proposed in this paper. Parameter to be identified can be obtained quickly and accurately through direct identification method if the identification process is transferred to solve nonlinear equation which represents the minimal error between simulated data and measured data. The identification results show that during identification process the proposed method has high identification efficiency, accurate identification results and robust identification process compared with the traditional parameter identification method. The proposed identification method brings a novel way for steam turbine speed governor system identification.