Topology research of deexcitation system for large generator based on soft-switching technology

DOI

10.2991/ifeesd-16.2016.191How to use a DOI?

Keywords

large generators; deexcitation; soft-switching; "parallelÿcharged, seriesÿdischarged"; nonlinear resistor.

Abstract

Theÿdamageÿofÿovervoltageÿandÿarcÿcausedÿbyÿstronglyÿpullingÿoutÿtheÿmagneticÿswitchingÿinÿtheÿtraditionalÿprocessÿofÿdeexcitationÿmakesÿtheÿdeexcitationÿproblemÿofÿtheÿlargeÿgeneratorÿbe-comeÿanÿimportantÿresearchÿsubject.ÿTheÿtechnologyÿofÿpowerÿelectronicsÿsoft-switchingÿprovidesÿa new way for the deexcitation of the large generator. In this paper, the topology of deexcitation system and its corresponding control circuit is designed, and it depend on the excitation parameters of the "Three Gorges" power plant. It propose a new way to design the non-linear resistor of energy consumption in deexcitation, or "parallelÿcharged, seriesÿdischarged", which significantly reduces the impact of voltage in deexcitation process, the deexcitation main switch is turned off when the main circuit current reduce to zero. The theoretical analysis prove that the deexcitation time is 0.51s and it's 0.4s from the simulation analysis. The results indicate that the deexcitation system with new topology can be fast, safe and reliable.

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/).

Download article (PDF)

TY  - CONF
AU  - Qinyue Tan
AU  - Jianhang Zhu
AU  - Shiying Wang
AU  - Sihang Cui
AU  - Lei Liang
PY  - 2016/05
DA  - 2016/05
TI  - Topology research of deexcitation system for large generator based on soft-switching technology
BT  - Proceedings of the 2016 International Forum on Energy, Environment and Sustainable Development
PB  - Atlantis Press
SP  - 1065
EP  - 1070
SN  - 2352-5401
UR  - https://doi.org/10.2991/ifeesd-16.2016.191
DO  - 10.2991/ifeesd-16.2016.191
ID  - Tan2016/05
ER  -