Abstarct: Energy management is hugely considered in Iran and other countries recently. Power plants as electrical energy providers are themselves one of the main consumers. So power saving plans in power plants is proposed as an effective strategy in reducing fuel consumption. Replacing old flow control systems with electric drives can lead to tremendous power save due to numerous usages of pumps and fans in power generation. In this study, substitution of old flow control system in Ramin power plant forced draft fan which uses damper to control, with electric drive is discussed. For technical study of new control system, fan, drive and electromotor was simulated in MATLAB. Result show that the system has good response in tracking variations of set points. Due to high cost of purchase and installation of suitable drive for FD Fans, investment must be explainable. So Fan Save software was used to compute the payback time. Result states that utilization of electric drive in FD fan is economical. Another point of view in this research was the effect of electric drive installation on unit efficiency. To compute that, Ramin power plant was modeled in Termoflow software and effect of control system change was discussed.