Title: Delayed ramping in the primary control system or local maintenance controller of a gas turbine implemented electrical power plant

Abstract: A predetermined time delay of speed setpoint ramping of a gas turbine is imposed at ignition in its primary control system or local maintenance controller in order to compensate for the fixed energy input at ignition which might otherwise greatly increase the possibility of flameout. The imposed time delay results in the increase of an initial turbine speed tracking mode time period for the duration of the time delay. During the time delay period, fuel flow is maintained at a fixed fuel valve setting and pressure. At the termination of the time delay period, ramping of a speed setpoint at a selected rate is begun and the turbine speed is thereby increased towards synchronization speed whereat synchronization is effected.

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Inventors: Burrows, Leonard H. (Gibsonia, PA, US)

Application Number: 551201
Filing Date: 1975-02-19
Publication_date: 1977-03-01
Assignee: Westinghouse Electric Corporation (Pittsburgh, PA)
Primary Class(es): 60/773 60/39.281, 700/289
Other Classes:
US Patent Ref:

3382671	May, 1968	Ehni	60/39.
3421317	Jan, 1969	Bedford	60/39.
3422619	Jan, 1969	Hendricks	60/39.
3469395	Sep, 1969	Spitsbergen	60/39.
3520133	Jul, 1970	Loft	60/39.
3691759	Sep, 1972	Scheerer	60/39.
3729929	May, 1973	Kiscaden	60/39.
3834361	Sep, 1974	Keely	60/39.

Other Refs:
Primary Examiner: Gordon, Clarence R.
Assistant Examiner:
Attorney: Possessky; E. F.