Project technology

The largest “back-to-back” flexible DC project in the world


The world’s largest “back-to-back” flexible direct current project was built in China’s Guangdong-Hong Kong-Macau Greater Bay Area on Saturday.

The project is the first of its kind to achieve a regional interconnection between power grid load centers. The project covers a new flexible DC converter station in Guangzhou and Dongguan to split the Greater Bay Area power grid into two independent “back-to-back” smart grids.

“This project is the first in the world to reasonably partition the complex structure of a power grid, and the first to use flexible direct current Technology for interconnecting partitioned networks, which can send power to each other in normal times and quickly back each other up in less than 0.1 seconds when outages occur, thus greatly improving the security and stability of power supply in the Greater Bay Area,” Rao Hong, chief technologist of China Southern Power Grid Corporation (CSG), told China Media Group.

The construction of the project, with an investment of 9.9 billion yuan (about 1.48 billion US dollars), lasted two years and led to an investment of about 8 billion yuan in the upstream and downstream industrial chains. downstream.

“Such a grid structure could avoid ‘putting all eggs in one basket’ and significantly reduce the risk of large-scale power failure caused by mutual involvement. When mutual assistance is needed, it is available through the outer ring. Meanwhile, the grid has become more flexible, which is more conducive to large-scale access to new energy,” said Ling Yizhen from the infrastructure department of Guangdong Power Grid Company under CSG.

The project will also enable the Greater Bay Area’s power grid to absorb and utilize wind, photovoltaic and other new energy on a larger scale, and will accommodate an additional six million kW of electricity. clean energy from offshore wind power and hydropower. western regions this year.

Source: This news was originally published by cgtn

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