Mechanism of Occurring Over-Voltage Phenomena in Distributed Power System on Energization of Transformers

Autor:	Fukashi Ueda, Hirokazu Kameyama, Yoshiki Nakachi, Takuya Kajikawa, Tooru Amau, Hisanori Ito
Rok vydání:	2010
Předmět:	Engineering Emtp business.industry Electrical engineering Energy Engineering and Power Technology Inrush current law.invention Inductance Overvoltage law Relay Equivalent circuit Electrical and Electronic Engineering business Transformer Test data
Zdroj:	IEEJ Transactions on Power and Energy. 130:25-34
ISSN:	1348-8147 0385-4213
DOI:	10.1541/ieejpes.130.25
Popis:	This paper verifies the mechanism of occurring over voltage phenomena in the distributed power system on energizing the transformer. This over-voltage, which is observed at the actual distributed power system, with heavy inrush current is found to occur at about 0.1-0.2sec after the energizing and continue for a duration of more than 0.1[sec]. There is a concern that this over-voltage may operate the protection relay and deteriorate the insulation of apparatus. It is basically caused by the resonance between the shunt capacitors and saturated/unsaturated magnetizing inductance of transformer, system inductance. By using analytical formulation of a simple equivalent circuit, its mechanism has been verified through simulations carried out by using EMTP. Moreover, the sympathetic interaction between transformers is prolonged the duration of the over-voltage by the field test data is discussed in this paper.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::dd859963f574e1def2b73ce1346d6476 https://doi.org/10.1541/ieejpes.130.25 Zobrazit plný text záznamu