Electric power system is one of the most important achievements in the history of human engineering science. It is an electric power production and consumption system composed of power generation, transmission, substation, distribution and electricity consumption.It will be the nature of the primary energy into electricity through the power plant power generation, transmission, substation and distribution of electricity to the user.With the development of computer technology, communication technology and control technology, the traditional control field is undergoing an unprecedented change and is beginning to develop