Preface 

Global energy interconnection (GEI) is a globally interconnected strong and smart grid, the backbone of which is a Ultra-High Voltage (UHV) grid. GEI serves as a global platform for the extensive development, delivery and utilization of clean energy. It is "smart grid + ultra-high voltage + clean energy" in nature; smart grid is the foundation; UHV power grid is the key; clean energy is the essence. GEI development will provide a great opportunity for innovations in relevant technology & equipment; and in turn, equipment progress will accelerate the development of GEI.

Since 2017, Global Energy Interconnection Development and Cooperation Organization (GEIDCO) has widely gathered GEI related information, made comprehensive analyses and scientific appraisals on key technologies and core equipment for the construction of the global backbone grid. Having consulted over 100 experts from members of GEDCO, including China Electric Power Research Institute, NARI Group, Xuji Group, Pinggao Group, State Grid Economic and Technological Research Institute, Tsinghua University, Zhejiang University, Xi'an Jiaotong University, etc., GEDCO has accomplished the compilation of Global Energy Interconnection Technology & Equipment Innovation Outline ( 2018-2025 ). This report relates to four technical fields: UHV & new types of transmission, smart grid, clean energy, and interconnected power grid operation and control. For equipment in each technical field, the current development state; future demands and research direction are analyzed; corresponding roadmap for innovation actions is put forward. The report provides a guide and reference for research institutes, manufacturers in the power and energy sector and other parties that engage in the development of GEI.