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TRVs and fault clearing stresses in extra‐high‐voltage radial networks
Author(s) -
Haginomori Eiichi,
Yoshimura Kenji,
Kobayashi Shunichi,
Kaneko Sadanori,
Yokota Takeshi,
Ishikawa Masayuki
Publication year - 1994
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/eej.4391140405
Subject(s) - busbar , circuit breaker , electrical engineering , electric power transmission , electric power system , voltage , transmission network , fault (geology) , transient (computer programming) , engineering , transient voltage suppressor , power (physics) , power network , high voltage , transmission system , short circuit , transmission (telecommunications) , computer science , physics , quantum mechanics , seismology , geology , operating system
To cope with the high rate of increase of power demand in the main industrialized districts in Japan, 550‐kV transmission systems covering the districts have been reinforced, with most of the main power plants connected directly to these systems. Through 550‐/300‐kV substations, the majority of power to the districts is supplied by 300‐kV systems. To limit the excess short‐circuit capacity in the 300‐kV systems, they tend to be reconstructed as so‐called radial networks. In radial networks with high short‐circuit capacity and relatively small number of transmission lines connected to the substation busbars, the rate of rise of TRV can be far higher than standard value. This paper analyzes the transient recovery voltages (TRV) in such extra‐high‐voltage radial networks in Japan, together with the relevant stresses to circuit‐breakers during fault clearings. Future system conditions have also been introduced. As the typical rate of rise of the TRV values, more than twice that of today's standard ones are probable.