General Electric Company

Omprakash Pobbati

Sunil Unnikrishnan

Karl Dean Minto

Pradeep Kumar Vavilala

James Frederick Den Outer

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.

Model based bump-less transfer between passive and active mode operation of three-way check valve for liquid fuel delivery in gas turbine systems

In an embodiment, a control system includes a processor. The processor is configured to receive signals from one or more sensors disposed in a gas turbine system, wherein the gas turbine system comprises a shaft mechanically coupled to an electric generator. The processor is further configured to predict a derived mechanical power for the shaft based on the signals. The processor is additionally configured to derive a power adjustment by executing at least one model. The processor is also configured to derive a corrected mechanical power by applying the power adjustment to the derived mechanical power; and to control the gas turbine system based on the corrected mechanical power.

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Hyderabad Telangana, India

Omprakash Pobbati