The influence of temperature on the differential current protection of EHV shunt capacitor bridges

DOI

10.2991/asei-15.2015.226How to use a DOI?

Keywords

temperature, fuse, double bridge differential current protection, shunt capacitor, setting calculation

Abstract

The shunt capacitor is a very important part of the EHV (Extra High Voltage) transmission system in China. Shunt capacitors can compensate reactive power and improve the power quality. It plays an important role in the regulations of voltages and power factors. At the same time, high repairing rates are always found in the outlet terminal shunt capacitors in each EHV station. Therefore, the protection scheme for EHV shunt capacitor is widely used: a single capacitor fuse protection acts as the primary protection, and the double bridge differential current protection acts as the backup protection. However, most of the existing research is based on the analysis of different fault conditions. The discussions on external factors, such as temperature, are limited. This paper studies the influences from temperature variations on the double bridge differential current protection of shunt capacitors. The influences are demonstrated by theoretical calculations as well as simulations.

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  - Yang Liu
AU  - Ziqi Wang
AU  - Yong Ma
AU  - Tianxi Xie
AU  - Zhicheng Zhou
AU  - Guang Chen
PY  - 2015/05
DA  - 2015/05
TI  - The influence of temperature on the differential current protection of EHV shunt capacitor bridges
BT  - Proceedings of the 2015 International conference on Applied Science and Engineering Innovation
PB  - Atlantis Press
SP  - 1141
EP  - 1147
SN  - 2352-5401
UR  - https://doi.org/10.2991/asei-15.2015.226
DO  - 10.2991/asei-15.2015.226
ID  - Liu2015/05
ER  -