Trans-regional electricity transmission in China: Status, issues and strategies

In order to achieve the large-scale, long-distance and high-efficiency trans-regional electricity transmission, it is of significance to construct a strong and national smart grid with ultra-high voltage (UHV) transmission system as its backbone and the coordinated development of power grids at all levels, which will enhance the resources allocation capacity of grid, promote the large-scale integration into grid of renewable energy, and further mitigate the power shortage in eastern and southern China. This paper starts with the analysis of the regional grids' supply and demand situation in China, and then analyzes the development status and existing issues of China's trans-regional electricity transmission. Finally, strategies and recommendations are proposed.