Recently, the 110 kV Shenzhen-Zhong Bridge Power Transmission and Transformation Project, the only 110 kV power supply project of the Shenzhen-Zhongshan Corridor, a super project undertaken by China Energy Engineering Guangdong Thermal Power, was put into operation, marking the realization of the main line "electricity connectivity" of the Shenzhen-Zhongshan Corridor. The Shenzhen-Zhongshan Corridor will be opened to traffic on schedule in 2024, and the subsequent joint commissioning of mechanical and electrical facilities and the commissioning of the entire lighting system will provide effective power guarantee.
The Shenzhen-Zhongshan Channel is a cross-sea cluster project in Guangdong Province that connects Shenzhen City, Zhongshan City and Nansha District of Guangzhou City, integrating "bridges, islands, tunnels and underwater interconnections". It has a total length of 24 kilometers, mainly 6.8 kilometers long. It consists of key structures such as a special long submarine steel-shell concrete immersed tube tunnel, the 1,666-meter main span Lingdingyang Bridge, the 580-meter main span Zhongshan Bridge, a 13-kilometer-long non-navigable bridge, east and west artificial islands, and interchanges.
In this project, the setting of key power facilities is particularly important. A new switch cabinet containing important components such as isolating switches, lightning arresters, vacuum circuit breakers and drop-out fuses was built to ensure the stable operation of the power system. At the same time, the newly built transformer, as the core equipment of the power system, provides stable power support for the entire Shenzhen-Zhongshan Channel.
This project is the first intelligent substation built on an island in Shenzhen. In this phase of the project, two new 63 MVA main transformers and a new line length of 12.13 kilometers are built. It adopts the latest intelligent substation design technology of China Southern Power Grid and is designed in accordance with high-level wind and flood prevention. Design and construction are carried out according to standards, effectively improving the power safety and stability of the Shenzhen-Zhongshan Channel.
After the project is completed and opened to traffic, the time from Zhongshan to Shenzhen will be shortened from about two hours to less than 30 minutes, which will greatly facilitate transportation in the region and also provide a solid guarantee for the power supply of the Shenzhen-Zhongshan Corridor.