Research on Variation of Reactive Power Capacity under DC Bias of Transformers

DOI

10.2991/ame-17.2017.6How to use a DOI?

Keywords

HVDC, DC bias, Transformer, Excitation current, Reactive power compensation capacity.

Abstract

When the high voltage direct current (HVDC) transmission lines run in monopole grounding operation or bipolar asymmetric operation, most of the DC current will flow the loop consisted of the grounding electrode and AC lines between transformers. This current increases the reactive power consumption of the transformer and threats the normal operation of the power grid. To solve this problem, this paper focuses on the increasing of excitation current when the transformer works on DC magnetic bias, and a simulation model of substation system under DC bias condition is established based on PSCAD. Quantitative analysis of the variation of the excitation current and the condition of reactive power consumption of transformers under different biasing current injection is carried out. The result shows that with the increase of the DC biasing current, the transformer excitation current distortion and reactive power loss increases sharply, which is important to the research on DC current and the reactive power consumption of the transformer under different bias current injections.

Copyright

© 2017, 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  - Ying-Fa He
AU  - Hang Zhao
AU  - Chang Liu
AU  - Xuan Zhou
AU  - Cao-Wei Wu
AU  - Zhi-Xun Wang
AU  - Ying Zheng
PY  - 2017/04
DA  - 2017/04
TI  - Research on Variation of Reactive Power Capacity under DC Bias of Transformers
BT  - Proceedings of the 3rd Annual International Conference on Advanced Material Engineering (AME 2017)
PB  - Atlantis Press
SP  - 33
EP  - 40
SN  - 2352-5401
UR  - https://doi.org/10.2991/ame-17.2017.6
DO  - 10.2991/ame-17.2017.6
ID  - He2017/04
ER  -