Combined cycle generators: integration and performance in the electric utility systems

Combined cycle technology is explained as a feasible alternative when utilities consider additional capacity requirements. An attempt is also made to provide a broad understanding of electric power systems, including interconnections, power flow, voltage and frequency requirements, which are essential to system reliability. Conclusions and recommendations are presented based on actual performance records of Chesterfield Unit 7, which began commercial operation on June 12, 1990. It is concluded that combined cycle units are economical, efficient and dependable. Their intermediate size and fuel flexibility make them attractive to utilities seeking intermediate capacity additions