Steam turbine valve test system
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United States of America Patent
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Apr 23, 1985
Grant Date -
N/A
app pub date -
Oct 3, 1983
filing date -
Oct 3, 1983
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A valve test system for closing off certain governor valves under steam flow conditions while still maintaining a substantially constant steam flow. A plurality of valve position demand signals is calculated for the respective governor valves with the signals being fully compensated with respect to non-linear flow characteristics of the valve. A valve test signal is injected in the control arrangement prior to the calculation of the valve position demand signals and causes closures of the valves under test and a proportionate further opening of the remaining valves.
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