Abstract: The domestic discussion on the Global Energy Internet basically focuses on physical interconnection of the power grid and the technology, ignoring the importance of system construction and coordination related to grid interconnection. The practice of European grid from physical interconnection to integrated market shows that the system construction, coordination and unification of the interconnection of grids is an important prerequisite for realizing the optimal allocation of all resources and low-carbon transformation within the interconnection grid. These institutional demands include at least three aspects, namely, the construction of transnational grid lines and transnational legal agreements related to the operation of transnational grids, the relevant systems of market integration, and the coordination and unification of regulatory standards and systems. However, there exists such a problem as paying a one-sided emphasis on power investment, but the construction of related systems being seriously lagging behind in China’s multinational power cooperation. Therefore, it is urgently necessary for China to change its one-sided pursuit of investment in the construction of transnational network lines, instead, focus on market-oriented reforms and regulatory systems, and recognize the importance and urgency of China’s current power system reform from the perspective of efficiency improvement of grid transnational systems and energy transition.

Key words: grid interconnection; European experience; China’s problem; system construction