China's digital economy powered by Yangtze River Delta hub

The State Grid Jiaxing Power Supply Company has helped China Telecom's Yangtze River Delta National Hub Jiaxing Computing Center implement a change in operation mode at its 110-kilovolt Telecom Substation.

By adopting a dual independent supply, the center is now equipped with a "double safeguard", ensuring an uninterrupted electricity supply to support massive computing workloads.

As a key regional computing hub, the Jiaxing Computing Center hosts critical operations for leading companies such as Tencent and Alibaba. Its power reliability directly affects the digital experience of millions of users. From the planning stage, ensuring a stable power supply was a priority.

On April 28, the 110-kV Telecom Substation was successfully energized. With a one-primary, one-backup line configuration, the substation underwent more than three months of meticulous testing, ensuring all equipment reached optimal performance and laying a solid foundation for the center's large-scale data services.

"Operations at Penguin Island cannot afford a single second of downtime. Tencent also requested additional requirements for our substation," said Lu Qiliang, electrical lead for the Jiaxing Computing Center project.

In response to Tencent's stringent reliability requirements, the power company quickly assembled a dedicated service team. Unlike traditional power supply modes, the "dual independent supply" configuration requires two separate 110-kV power sources to operate independently.

Key switches, including the 110-kV and 10-kV bus tie switches within the client substation, must remain open to prevent any interaction between the two sources — eliminating the risk of cross-circuit faults. While the concept is simple, it demands extremely high standards in power-side configuration and client-side management.

To achieve this, dispatch, operations, and customer service teams coordinated closely. The dispatch team conducted power point load analyses and verified feasibility through simulation exercises. Customer managers oversaw the process, ensuring internal management protocols were updated and that all staff fully understood dual-supply operating standards.

"We not only meet the data center's needs but also align with the core requirements of their clients. This is our responsibility to the 'user's user'," said Lin Hong, a customer manager, highlighting the deeper logic behind reliable power service.

From single-source to dual independent supply, from reactive response to proactive planning, State Grid's upgraded power reliability injects essential "electric energy" into the development of the digital economy. Backed by the Telecom Substation, the Jiaxing Computing Center has successfully undertaken multiple national-level computing tasks.

The entry of major operations such as Tencent's Penguin Island and Alibaba further demonstrates the solid strength of "power protection" in supporting digital infrastructure.