Comparison of Different Transformer Models and Their Influences on Power Flow of Three-Phase Distribution System

doi:10.11930/j.issn.1004-9649.2014.6.49.5

Abstract

Abstract: The establishment of the detailed three-phase transformer model is critical to distribution network analysis. Based on the established model, the interphase magnetic coupling and magnetizing branches influence on the transformer model are analyzed, and estimations of zero-sequence parameters and excitation branch parameters are discussed. Then, based on the IEEE 4-bus distribution test system, the detailed analysis of the power flow calculation is given, which includes the influences of the inter-phase magnetic coupling and magnetizing branches. The results of the test cases show that the interphase magnetic coupling has great impact on the results of three-phase power flow and the excitation loss should not be neglected.

Key words: distribution system, transformer models, magnetizing branches, power flow calculation

CLC Number:

TM411+.2

GAO Ya-jing, MIAO Hong-jia, WU Wen-chuan, JU Yun-tao, LI Fei. Comparison of Different Transformer Models and Their Influences on Power Flow of Three-Phase Distribution System[J]. Electric Power, 2014, 47(6): 49-54.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.2014.6.49.5

https://www.electricpower.com.cn/EN/Y2014/V47/I6/49

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