Volume 52, Issue 3 pp. 1518-1530
ORIGINAL PAPER

Cut-set matrix methods for frequency response analysis curves of lumped parameter equivalent circuit model of three-winding power transformer

Song Wang

Corresponding Author

Song Wang

Department of Power and Electrical Engineering, Northwest A&F University, Xianyang, Shaanxi, China

Correspondence

Song Wang, Department of Power and Electrical Engineering, Northwest A&F University, Xianyang, Shaanxi, China.

Email: [email protected]

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Wei Wang

Wei Wang

Department of Power and Electrical Engineering, Northwest A&F University, Xianyang, Shaanxi, China

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Fei Xie

Fei Xie

Department of Power and Electrical Engineering, Northwest A&F University, Xianyang, Shaanxi, China

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Shengxuan Qiu

Shengxuan Qiu

Department of Power and Electrical Engineering, Northwest A&F University, Xianyang, Shaanxi, China

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Fengye Yang

Fengye Yang

Department of Power and Electrical Engineering, Northwest A&F University, Xianyang, Shaanxi, China

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First published: 13 October 2023

Summary

To accurately and efficiently calculate the frequency response of the lumped parameter equivalent circuit model (LPECM) of a transformer winding is the basis for studying the simulation method of the frequency response analysis (FRA). In this paper, two different cut-set matrix (CSM) methods, including fundamental cut-set (FCS) and independent cut-set (ICS) matrix methods, are proposed to calculate the FRA curves of the LPECM of a three-winding power transformer. First, based on graph theory and electrical circuit laws, the basic CSM equation is deduced. Second, four different FCS matrix selection methods of the LPECM are introduced and the best FCS matrix is determined by deeply analyzing their characteristics. Then, an ICS matrix method is proposed to obtain the ICS of the LPECM. Furthermore, FCS and ICS are taken into the CSM equation to calculate the FRA results of the LPECM, respectively. Finally, the accuracy of the proposed methods is validated by Multisim software and the performance of these two methods is compared with node voltage matrix (NVM) method by analyzing the calculation time. The results show that FCS and ICS matrix methods both can be used to accurately obtain the FRA results of the LPECM of the three-winding power transformer, but ICS is more simple than FCS matrix method due to avoiding the procedure for the selection of the tree. In addition, since ICS matrix method has the shortest running time among these methods, it can be used to improve the calculation efficiency of the FRA curves of the LPECM of a three-winding power transformer.

DATA AVAILABILITY STATEMENT

Data sharing is not applicable to this article as no datasets were generated or analyzed during the current study.

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