Three-Phase Unbalanced Linear Power Flow Calculation Based on Voltage Magnitude Logarithmic Transformation

doi:10.11930/j.issn.1004-9649.202101019

Abstract

Abstract: The linear power flow calculation method can provide better robustness and higher efficiency for active distribution network analysis and operation regulation. In this paper, a new three-phase unbalanced linear power flow calculation method is proposed. The voltage magnitude of the three-phase power flow equation is transformed into logarithmic form under polar coordinates. And then a reasonable linear approximation is formed according to the actual characteristics of the three-phase distribution network. The proposed method avoids iterating and can directly calculate the three-phase unbalanced power flow of the radial and weak-loop distribution networks as well as the distribution networks containing PV nodes.The proposed method is tested and compared through an IEEE33 three-phase unbalanced example, and its effectiveness has been verified.

Key words: linear power flow, three-phase unbalanced, distribution network, voltage magnitude logarithmic transformation

LI Hongwei, PAN Li, HAN Lu, GE Mingrui. Three-Phase Unbalanced Linear Power Flow Calculation Based on Voltage Magnitude Logarithmic Transformation[J]. Electric Power, 2022, 55(5): 143-148.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.202101019

https://www.electricpower.com.cn/EN/Y2022/V55/I5/143

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