The Fuyang Aquatic Sports Center was the birthplace of the first gold medal of the Asian Games. Now, it will host the Hangzhou Super Cup of the International Canoe Federation in 2024. The importance of a reliable power supply is self-evident.

State Grid Hangzhou Power Supply Company innovatively applies the 220 kV flexible low-frequency transmission demonstration project, implements low-voltage uninterrupted synchronous grid connection operations and ensures the power safety of the venue and surrounding areas through accurate measurements of conductor distances.

Adopting China's original and internationally leading flexible low-frequency transmission technology to achieve power complementarity in supply areas

The 220 kV flexible low-frequency transmission demonstration project in Hangzhou is situated on both sides of the Fuchun River. It is China's first 220 kV flexible low-frequency transmission project and is currently the flexible low-frequency transmission project with the highest voltage level and largest transmission capacity in the world.

The project adopts China's original and internationally leading flexible low-frequency transmission technology. Two new high-voltage and large-capacity low-frequency converter stations, Tingshan and Zhongbu, are built and connected to the Shengguang supply area and Fuyang supply area in Xiaoshan respectively, realizing interconnection and mutual support between the two supply areas.

The flexible low-frequency transmission technology reduces the transmission frequency of 50 hertz in the traditional power grid to 20 hertz, reduces line losses and cable charging reactive power and improves the transmission capacity and range of system power. Through flexible regulation of the magnitude and direction of power flow by power electronic devices, the ability of power flow mutual support between the two supply areas is improved and the mutual support of surplus and deficiency of supply area loads is achieved.

"In simple terms, it means that whichever supply area, Shengguang or Fuyang, has a high load, the other supply area can flexibly provide power to it, effectively ensuring the power supply reliability of Fuyang area during the Hangzhou Super Cup event," said the person in charge of State Grid Fuyang District Power Supply Company, Hangzhou City.