A combined cycle power plant CCPP (10) includes one turbomachine (12, 12') and heat recovery steam generator HRSG (14, 14') that is shutdown (or offline) and a second turbomachine (12, 12') and heat recovery steam generator HRSG (14, 14') that is online. T...

The purpose of the present invention is to provide a rotation speed detection device (12) which achieves improved detection accuracy regardless of a compressor (9) and the operating state of the compressor (9), and enables the prevention of the breakage of...

The system (301) for mitigating an overspeeding condition of a turbine engine (113) can include a sensor (303) for measuring an actual speed (Ng) of a gas generator turbine (127) of the turbine engine and a processor (305) for deriving a delta (407), the d...

An air turbine start system is provided that includes an air turbine starter, a starter air valve, a turbine speed sensor, and a circuit. The starter air valve is movable between an open position, in which the pressurized air may flow into the air turbine ...

An APU (10) has a gas turbine engine (28) and a starter generator (26) to be selectively driven by the gas turbine engine. A sensor (34) senses windmilling of components associated with the starter generator. A lock feature limits rotation within the start...