The Simulation Research in Active Grounding Protection of the Small Current Grounding System Based on Active Protection

DOI

10.2991/ameii-16.2016.147How to use a DOI?

Keywords

Small Current Grounding System, Active Protection, PSCAD, Wavelet Transform. Fault Location, Line Selection

Abstract

The small current grounding system has many problems: low ability of extinguishing arc grounding and personal sense of electric system, none security and protection ability to indirect grounding overvoltage, equipment internal fault grounding. Especially with the rapid development of urban distribution network construction, the cable line users increasing, causing the system of single-phase grounding capacitive current keeps increasing, which caused a single-phase earth fault in power grid and rapid expansion of the accident. Firstly, the small current grounding system is briefly introduced in this paper. Then according to the research on the change of steady state and transient state, line selection methods are designed for different electric parameters. Active protection method for single-phase grounding fault happens in small current grounding system is put forward. This method selects the fault line according to the difference of high frequency component amplitude of zero sequence current before and after the fault and polarity of zero sequence current after the bus initiatively grounds. Finally in order to prove the validity and effectiveness of the proposed method, simulation model is built in PSCAD/EMTDC with the overhead line using the Bergeron model. The output current of different lines is then decomposed by the wavelet transform.

Copyright

© 2016, 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  - Jingjin Cao
AU  - TianZheng Wang
AU  - Hua Yu
PY  - 2016/04
DA  - 2016/04
TI  - The Simulation Research in Active Grounding Protection of the Small Current Grounding System Based on Active Protection
BT  - Proceedings of the 2nd International Conference on Advances in Mechanical Engineering and Industrial Informatics (AMEII 2016)
PB  - Atlantis Press
SP  - 751
EP  - 754
SN  - 2352-5401
UR  - https://doi.org/10.2991/ameii-16.2016.147
DO  - 10.2991/ameii-16.2016.147
ID  - Cao2016/04
ER  -