Abstract: Power systems owners are being confronted with complex operating processes brought on by deregulation. In order to complete in today`s electrical power market place and meet these complex operating conditions, power system owners have begun to retrofit their turbo generator control with modern digital control platforms. Because these modern control platforms provide better control of the power system, the flexibility to meet the demands of the market can be obtained. The control system design is critical to optimize availability and reliability. This study presents examples of generator control system design and integration and offers recommendations for a successful control upgrade. A real time power system simulator in Matlab/Simulink has been used for testing.