A Fast Method to Identify the Order of Frequency-Dependent Network Equivalents

被引：14
作者：
Hu, Yizhong [1 ]
Wu, Wenchuan [1 ]
Zhang, Boming [1 ]
机构：
[1] Tsinghua Univ, Dept Elect Engn, Beijing 100084, Peoples R China
来源：
IEEE TRANSACTIONS ON POWER SYSTEMS | 2016年 / 31卷 / 01期
基金：
美国国家科学基金会;
关键词：
Frequency-dependent network equivalents; Prony analysis; rational modeling; vector fitting; RATIONAL APPROXIMATION; DOMAIN RESPONSES; MATRIX;
D O I：
10.1109/TPWRS.2015.2395428
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Rational approximation of frequency-dependent network equivalents with vector fitting (VF) is widely used in power system analysis; however, a detailed examination of methods to determine the order of the model has not been reported. The traditional order identification method of the frequency response resonance peak is conservative, as demonstrated in this paper. We discuss the essential relationships between VF and Prony analysis (PA). A PA-based method is then proposed to identify the order of model, considering the resonance peaks. The method is computationally inexpensive, and the precision can be adjusted easily. Numerical investigations demonstrate the validity and efficiency of the method.
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页码：54 / 62
页数：9
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