System and method for modular control of a multi-fuel low emissions turbogenerator
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United States of America Patent
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app pub date -
Apr 29, 2002
filing date -
Dec 1, 1999
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Abandoned
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Abstract
A system and method for modular control of a multi-fuel turbogenerator include separate controllers for controlling fuel supplied to the combustor and power output from the generator. The power controller generates a fuel command based on the required turbine exhaust temperature, where the fuel command is independent of the particular fuel being used. Fuels may include natural gas, diesel, propane, waste gas, or gasoline, for example. The power controller communicates the fuel command and the airflow or calculated air/fuel ratio to the fuel controller which selects an appropriate mode of operation for the injectors. Injector operating modes include one or more pilot modes where fuel is not mixed with air prior to combustion, and one or more premix modes where fuel is highly mixed with air prior to combustion. The fuel controller implements closed-loop feedback control of a fuel metering device and controls the fuel injectors in the appropriate operating mode based on the fuel command, the energy content of the fuel being used, and the air/fuel ratio.
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