Jinji 750 kV power transmission and substation officially put into operation, smoothing the new energy delivery channel in eastern Ningxia

China News Service, Yinchuan, November 12 (Reporter Yu Jing) On November 12, as the 750-kilovolt Jizhou Line II, Jimiao Line I and the No. 1 main transformer were put into operation in sequence, the Jinji 750-kilovolt transmission and substation, which covers an area and has the largest equipment volume in Ningxia, was successfully put into operation. A new ultra-high-voltage grid hub was added to the Gobi, opening up a new channel for new energy consumption and green power transmission in eastern Ningxia.

Jinji 750 kV transmission substation covers an area of ​​277 acres. In this phase, two new main transformers are built, with a single capacity of 2100 MVA. It is planned to have 8 750 kV outgoing lines and 11 330 kV outgoing lines. The project started in October 2025 and took 13 months to complete and put into production. The Yinliang busbars, large main transformers, and high-voltage structures in the station are laid out in an orderly manner. Real-time load data in the main control room is dynamically beating, and operation and maintenance personnel are continuously on duty for inspections to ensure the smooth operation of the equipment.

In recent years, Ningxia's new energy installed capacity has continued to grow, and energy storage and green power projects have accelerated. The original 750 kV grid collection pressure has increased, and the transfer load of Lingzhou converter station has become saturated. After the Jinji Power Station is put into operation, it will rely on multiple transmission channels from Jinji to Lingzhou, Yinchuan East, and Miaoling to strengthen Ningxia's "three-dimensional double-ring network backbone grid", effectively divert the pressure of the Lingzhou converter station, simultaneously improve the grid connection of the Yongli Power Plant and the access conditions for regional new energy and energy storage projects, and enhance the power grid resource allocation capability.

The relevant person in charge of State Grid Ningxia Electric Power said that during the project acceptance phase, State Grid Ningxia Electric Power sorted out a list of high-frequency problems and major hidden dangers in similar projects and carried out key inspections. In the typical interval acceptance phase alone, 761 defects were discovered and rectified and eliminated one by one, and common hidden dangers were resolved in batches to ensure high-quality operation of the project.

The completion and commissioning of this ultra-high-voltage hub rooted in the Gobi will further activate the advantages of wind and solar resources in eastern Ningxia, expand the space for green power consumption and delivery, and provide strong grid support for Ningxia to accelerate the construction of new power systems and promote green energy transformation.