Model based bump-less transfer between passive and active mode operation of three-way check valve for liquid fuel delivery in gas turbine systems
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United States of America Patent
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Oct 15, 2019
Grant Date -
Jan 18, 2018
app pub date -
Jul 14, 2016
filing date -
Jul 14, 2016
priority date (Note) -
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status (Latency Note)
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Abstract
A method using an inverse three-way valve model with feed-forward fuel flow control is provided for controlling liquid fuel flow in a turbine power generation system to achieve a bump-less driven watts (dwatt) power output during fuel mode transitions between passive mode and active mode operations of a three-way check valve that delivers liquid fuel to the turbine combustor nozzles. The method utilizes an inverse fluid flow model for a three-way check valve which is based upon a valve position surrogate for the three-way check valve to develop a calculated estimate of a fuel spike/dwatt oscillation likely to occur during mode transitions of the three-way check valve and to produce a feed-forward control used to modulate a fuel path bypass valve within the turbine fuel supply circulation system that provides the liquid fuel to the three-way valve during transfers of valve operation between passive and active mode operations.
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