Abstract:With the global climate change and the increasingly serious environmental problems, it has become an important task to build a new power system with new energy as the main body to achieve sustainable development. This paper compares the development forecasts of typical scenarios of new power system by State Grid Energy Institute, China Electric Power Research Institute, China Institute of Engineering and North China Electric Power University, and draws the conclusion that the proportion of new energy will further increase. The key technologies and challenges involved in the new power system are deeply discussed, and the specific technical solutions are given. Through the detailed analysis of renewable energy grid connection, intelligent control system and energy storage technology, the development status and trend are clarified, and the corresponding development strategies and suggestions are put forward in view of the challenges faced. By analyzing the intermittence and instability of renewable energy, the cost and benefit of energy transformation, the flexibility and reliability of power system, and the support of policies and regulations, the development strategies and suggestions of new power system are given, aiming at providing useful reference for the further development of new power system.