In the late 1990s the electrical power industry is going through a rapid period of change. The opening of the transmission systems to competition among generators and the splitting of vertically integrated utilities have changed the structure of the industry. The widespread blackout in northeastern North America in 1965 provided a great impetus for cooperation among utilities. With the advent of competition this has been replaced by the need for confidentiality. In this course we examine some of the implications for transmission system control brought about by these changes.