Reason Analysis for the increase of single-phase short circuit current and its suppressing measure

DOI

10.2991/icitmi-15.2015.31How to use a DOI?

Keywords

Single-phase short circuit current; Neutral grounding; Small reactance; Autotransformer

Abstract

Aiming at the issue that the single-phase short circuit current at the 220 kV bus of Chengdu 500kV substation exceeds the three-phase short current or even exceeds the breaking capacity of breaker, the reason is analyzed and the measure that main transformer neutral grounding by small reactance is put forward to reduce the single-phase short circuit. According to the planning power network of Sichuan, this paper analyzes the limiting effects of 500 kV autotransformer neutral grounding by small reactance on 220 kV single-phase short circuit current by simulation and calculation. This paper also analyzes the influence of neutral grounding by small reactance on insulation level of neutral point, and put forward a directive idea about small reactor's selection

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Y. Li
AU  - H. Zhang
AU  - G. Chen
PY  - 2015/10
DA  - 2015/10
TI  - Reason Analysis for the increase of single-phase short circuit current and its suppressing measure
BT  - Proceedings of the 4th International Conference on Information Technology and Management Innovation
PB  - Atlantis Press
SP  - 169
EP  - 173
SN  - 2352-538X
UR  - https://doi.org/10.2991/icitmi-15.2015.31
DO  - 10.2991/icitmi-15.2015.31
ID  - Li2015/10
ER  -