摘要
明确指出了负荷动特性的分类与综合在面向实用化过程中所必须解决的3个层次问题。以基于实测响应空间的负荷动特性分类方法为基础,提出了一种负荷动特性直接综合方法:采用重心法原理确定各类负荷特性的聚类中心作为其等效实测响应样本;通过对各个聚类中心等效样本进行参数辨识以得到相应类的综合模型参数;运用判别分析法确定新实测样本的所属负荷特性类别并形成修正后的新的聚类中心等效样本;对加入新样本后的聚类中心等效样本进行参数辨识以得到相应类的修正综合模型参数。以某一变电站采集的负荷特性数据为例,验证了提出的方法简便、准确、有效。总结了考虑负荷时变性的总体测辨法建立某一综合负荷点的模型的大体步骤。
Three layers problems that must be settled in the application of the classification and synthesis for load dynamic characteristics are definitely pointed out. Based on the load dynamic characteristics classification method that uses the measured response space as the character space, a direct synthesis method for load dynamic characteristics is presented. At first, the center of gravity method is used to obtain the clustering centre of each load dynamic characteristics classification; then by identifying the clustering center, the synthetic load model of a classification is gained; at last, the distinguish analysis is used to judge the classification ascription of new load dynamic characteristics samples and then the new clustering centers including new samples are computed, and the amendatory synthetic load model of a classification is gained by identifying the new clustering center. With the load dynamic characteristics samples collected from a substation, the correctness, convenience and effectiveness of the method is proved. Finally, the basic steps of using measurement-based method to establish the model of an aggregate load considering load time-variation characteristic are summarized.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2006年第21期36-42,共7页
Proceedings of the CSEE
基金
高等学校骨干教师资助计划项目([2002]65号)
湖南省教育厅重点项目(湘教通[2001]197号)
关键词
电力负荷建模
负荷动特性综合
重心法
判别分析法
实测响应空间
electric load modeling
synthesis for load dynamic characteristics
center of gravity method
distinguish analysis
measured response space
