Transducer out of range protection for a steam turbine generator

Details Transducer out of range protection for a steam turbine generator Transducer out of range protection for a steam turbine generator

1973-12-21

1977-10-11

Ostrager, Allen M.

Prime-mover dynamo plants

Turbogenerators

290 40R, 60663, 60679, F01K 1302

Patent

active

040537862

ABSTRACT:
Unnecessary fast valving action for load loss protection in a steam turbine generator system induced by partial transducer failure is minimized by the disclosedmethods and apparatus. Upon the occurrence of a mismatch between reheat pressure and electrical output, the interceptor valve is closed momentarily to interrupt the flow of steam to the low-pressure turbine and prevent overspeed. The valve cannot be closed again for a predetermined interval. If the mismatch is not corrected by the one fast valving action, a transducer has failed and further closing of the interceptor valve, except for a full load loss, is precluded until corrective action is taken. The faulty transducer is singled-out by comparing one of the transducer signals with the impulse pressure which is also an indication of the actual operating level of the turbine.

REFERENCES:
patent: 3097490 (1963-07-01), Callan et al.
patent: 3511051 (1970-05-01), Mitchell

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