Abstract: The apparatus of the present invention is designed for use with a source of natural gas which is substandard in that its BTU content is inconstant. The apparatus includes a fuel powered turbine engine having an air compressor section, a combustion section and a power turbine section which is connected to drive an electric generator which in turn is adapted for connection to the infinite bus of the local electric power distribution system for cogeneration of electric power. This is accomplished by an electronic circuit which senses the compressor inlet temperature (CIT) and the turbine inlet temperature (TIT) and automatically feeds the available substandard gas to the turbine engine in a manner maintaining a constant energy flow.

Abstract: Apparatus and method for setting, controlling, and maintaining a given turbine inlet temperature in a gas-driven turbine and AC generator driven thereby having the generator output connected to a fixed frequency AC infinite bus. The method comprises providing electric signals proportional to generator rotational speed, turbine inlet temperature, and generator output power respectively. These three signals are processed and combined with two independent reference electric signals, representing preset desired values of rotational speed and turbine inlet temperature, to provide an output which, when applied to an electrically actuated fuel flow control means, will maintain a constant given turbine inlet temperature.