Of growing significance is the conversion of natural gas into electricity, on-site, through the use of direct-fired gas turbines. Most installations will best be served by applying the “modular concept”; i.e., a group of turbine-alternator modules which can be added or taken from the line to meet the variation in load profile throughout a 24-hr day. Many of these must operate on a completely automatic, unattended basis. The purpose of the paper is to outline the various automatic controls required, describe some of the major factors in the design of these controls, and to provide a better understanding of the completely automatic, modular on-site gas-turbine energy system.

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