Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/64939
Title: The behavior of single-shaft combined cycle gas turbine units at frequency drop in the connected grid
Authors: Silbermann, V.
Issue Date: 2018
Publisher: Ural Federal University
WIT Press
Уральский федеральный университет
Citation: Silbermann V. The behavior of single-shaft combined cycle gas turbine units at frequency drop in the connected grid / Viktor Silbermann // International Journal of Energy Production and Management. — 2018. — Vol. 3. Iss. 3. — P. 237-243.
Abstract: In the last 15 years many companies have developed single-shaft combined cycle gas turbine (CCGT) units having one generator, which is coupled to common single shaft of gas turbine (GT) and steam turbine (ST) via a special elaborated synchro-self-shifting (SSS) clutch. This clutch connects automatically the drive of the ST at one end of the generator to complement the drive of the GT at the other end of the generator. Such a technical solution, in comparison to previous ones, allows economizing on one generator circuit breaker (GCB) as well as the use of a two-winding transformer instead of a three-winding transformer. This scheme of single-shaft CCGT units is taking place in many countries, but cases of tripping of such units by surge protection of GT have been observed in any power plants (PP). All such trippings were accompanied by frequency drop in the high voltage (HV) grid, to which these units were connected, although these drops were within the permissible limits for the CCGT units. This paper reports the results of investigating one of these cases of tripping, discusses the possible cause of these incidents and elaborates on some measures to prevent such trippings in the future.
Keywords: CCGT UNIT
DISTURBANCES IN THE HV GRID
FREQUENCY DROP
SSS CLUTCH
STEAM TURBINE ACCELERATION
SURGE PROTECTION
WATER PUMPS’ DRIVES
URI: http://hdl.handle.net/10995/64939
RSCI ID: https://elibrary.ru/item.asp?id=36430476
ISSN: 2056-3272 (paper format)
2056-3280 (online)
DOI: 10.2495/EQ-V3-N3-237-243
Origin: International Journal of Energy Production and Management. 2018. Vol. 3. Iss. 3
Appears in Collections:International Journal of Energy Production and Management

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