Virtual sensor systems and methods for estimation of steam turbine sectional efficiencies
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United States of America Patent
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Nov 24, 2015
Grant Date -
Dec 20, 2012
app pub date -
Jun 20, 2011
filing date -
Jun 20, 2011
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Abstract
Systems and methods of estimating an efficiency of a section of a steam turbine are disclosed. The systems and methods include determining a set of measurement data obtained directly from a set of sensors on the steam turbine, determining a set of derived data relating to measurements that cannot be obtained directly from the set of sensors, and estimating the efficiency of the section using the set of measurement data and the set of derived data. The systems and methods disclosed use physics-based models combined with nonlinear filtering techniques to estimate steam turbines' efficiencies when physical sensors are not available. These models capture the behavior of different components of the power plant, including all steam turbine sections, admission and crossover pipes, flow junctions, admission and control valves.
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