Technical analysis of 500kV oil-immersed series transformer for unified power flow controller

DOI

10.2991/ifeesm-17.2018.179How to use a DOI?

Keywords

the unified power flow controller; series transformer; over excitation; technical specification

Abstract

500kV series transformer is the key equipment in Suzhou 500kV unified power flow controller(UPFC) project, which undertakes the regulation of voltage and power between the converter and the line. Due to the special connection mode and operating condition, 500kV series transformers differ from conventional ones. First, the main insulation of the line side winding is matched with the line voltage grade, and the longitudinal insulation of the end is determined by the overvoltage level, which brings complex characteristics of the insulation level of the line side windings. Secondly, the lightning full-wave impulse test and the applied AC voltage withstand test are also different from the conventional transformers. Finally, the special working condition of series transformer causes the high requirement of anti-short circuit ability and over excitation capability. In Suzhou UPFC project, a large number of technical researches, aiming at difficult problems of the complex insulation of the windings, the special test technology, the anti-short circuit ability and the high excitation ability, have been carried out for 500kV oil-immersed series transformer. In this paper, the technic analysis of 500kV series Transformer in Suzhou UPFC project is carried out from various aspects, such as operating conditions, technical characteristics and test requirements.

Copyright

© 2018, 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  - Peng Wu
AU  - Lei Sun
AU  - Fengbo Tao
AU  - Cao Wei
AU  - Qun Li
AU  - Xiaoping Yang
PY  - 2018/02
DA  - 2018/02
TI  - Technical analysis of 500kV oil-immersed series transformer for unified power flow controller
BT  - Proceedings of the 2017 3rd International Forum on Energy, Environment Science and Materials (IFEESM 2017)
PB  - Atlantis Press
SP  - 957
EP  - 964
SN  - 2352-5401
UR  - https://doi.org/10.2991/ifeesm-17.2018.179
DO  - 10.2991/ifeesm-17.2018.179
ID  - Wu2018/02
ER  -