HYBRID GAS TURBINE POWER GENERATION SYSTEM
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United States of America Patent
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Mar 2, 2016
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Mar 6, 2015
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Some embodiments are directed to a method of modulating power output of a hybrid gas turbine power plant, including a conventional (GT) gas turbine, via a fluid connection(s) allowing air injection or extraction, further including a compressed air energy storage system (CAES). Power is increased or decreased by selectively reconfiguring the GT compressor to reduce or increase its mass flow rate whilst simultaneously selectively adjusting how much air to transfer as a compensatory mass flow between the CAES and GT systems, via the fluid connection(s), temporarily minimizing any change in mass flow rate and hence operating conditions in the combustor, thereby providing improved frequency response mode wherein power is modulated to meet grid fluctuations in under ten seconds. Use of an adiabatic CAES system with a direct TES can return heat immediately and damp pressure fluctuations, and rapid bleed rates may be achieved temporarily by venting to atmosphere.
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