The increasing complexity of the modern power grid highlights the need for advanced modeling and control techniques for effective control of turbogenerators. This paper presents the design of a Continually Online Trained (COT) Artificial Neural Network (ANN) based controller for a turbogenerator connected to the infinite bus through a transmission line. Two COT ANNs are used for the implementation; one ANN, the neuroidentifter, to identify the complex nonlinear dynamics of the power system and the other ANN, the neurocontroller, to control the turbogenerator. The neurocontroller replaces the conventional automatic voltage regulator (AVR) and turbine governor. Simulation and practical implementation results are presented to show that COT neurocontrollers can control turbogenerators under steady state as well as transient conditions.