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Your search keyword '"Sun, Yuanyuan"' showing total 15 results
Start Over Author "Sun, Yuanyuan" Publication Year Range Last 10 years Publisher hindawi limited
15 results on '"Sun, Yuanyuan"'

15. Unbalanced source identification at the point of evaluation in the distribution power systems.

Author

Sun, Yuanyuan, Xie, Xiangmin, and Li, Peixin

Subjects
*ELECTRIC power distribution, *ELECTRIC utilities, HEATING effects of electric currents
Abstract

Summary: Three‐phase unbalance is one of the most important power quality problems in the power system. When the system is working under unbalanced conditions, more losses and heating effects will be induced, and the system will become less stable, which is harmful to both utilities and customers. The most important thing for a seriously unbalanced system is to find out the main unbalanced source to take proper measures to mitigate the problem. In this paper, a method is proposed to indentify the main unbalanced source at the point of evaluation (POE) in the distribution power systems. Two extreme cases are analyzed in the paper by assuming that the unbalanced source to be totally from the POE upstream network or downstream network. Therefore, 2 corresponding analytical formulas are derived to reveal the relationship between the POE voltage unbalance factor (VUF) and the current unbalance factor (CUF). A method is then proposed to determine the contribution of the unbalanced source at the upstream and downstream networks based on the comparison between the derived VUFs and the actual VUF. Sensitivity analysis is implemented to show the robustness of the proposed method. The effectiveness and validity of the proposed method is illustrated by the IEEE 13‐bus test system and IEEE 37‐bus test system. It is shown that the estimation error of the proposed method is generally within 5%. [ABSTRACT FROM AUTHOR]

Published
2018
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