Abstract:Load forecasting is very important to the power system. It is the basis of power system planning and scheduling, and also the security, stability and economic operation of power system. The precise load forecasting of electric power system is always the pursuit of the goal, a new method of algorithm, applied to a variety of modern load forecasting, different forecasting methods due to their own characteristics suitable for load forecasting are not the same, it is necessary for different methods in load forecasting . The paper discusses the domestic and foreign research situation of load forecasting, analyzes several traditional methods of power system load forecasting and modern intelligent methods, and summarizes the advantages and disadvantages of various forecasting methods. The power system has a certain reference value in selecting the load forecasting method. Finally, several specific load forecasting scenarios under smart grid are introduced. From these perspectives, load forecasting problems can be seen, and load forecasting methods suitable for these scenarios can be drawn, and the future development of load forecasting is also forecasted.