基于EE模型的励磁系统参数时域辨识法  

A METHOD OF TIME DOMAIN IDENTIFICATION BASED ON EE MODEL FOR THE EXCITATION SYSTEM PARAMETERS

作　　者：王良 沈善德[1] 朱守真[1] 周逢权 

机构地区：[1]清华大学电机系,北京市100084 [2]北京许继电气有限公司,北京市100085

出　　处：《电力系统自动化》2002年第8期25-28,37,共5页Automation of Electric Power Systems

摘　　要：提出一种基于 EE(方程误差 )模型的时域辨识算法 ,通过对离散采样数据的多重积分 ( PLPF法 )估计模型参数值 ,直接求取待辨识系统微分方程的系数 ;再根据微分方程的系数 ,由待定系数法得到一个非线性方程组 ,然后用牛顿迭代法求解得出传递函数的模块环节实际参数。该方法的优点在于根据输入输出采样数据直接在时域上进行参数辨识 ,方法简便 ,较好地解决了由传递函数多项式 a,b系数转化为传递函数框图环节参数的实际需求。A new method for identifying the excitation system parameters of large synchronous generators has been presented. This method,based on EE model,is a tim e domain identification method.Applying multiple integral to discrete sample data, we can get the param eters of the differential equation of the identified system.Newton iteration method is introduced to resolve m odel parameters.According to input and output data,this m ethod identifies parameter in time dom ain directly. Moreover,it has solved the questions that transform the transfer- function coefficient into the traditional m odel param eters. In particular,this m ethod has been applied successfully in a 2 0 0 MW generator.Field tests show thatthis method is reliable.

关 键 词：励磁系统 参数辨识 传递函数 非线性牛顿法 多重积分法 EE模型 时域辨识法 数学模型 电力系统 暂态稳定 

分 类 号：TM711[电气工程—电力系统及自动化]