Fengsui transmission project put into operation

The Fengsui 750-Kilovolt Transmission and Transformation Project, Ningxia's first key grid hub under the 15th Five-Year Plan (2021-25), was officially commissioned near the Helan Mountains on June 5.

This project marks the second 750kV hub substation in northern Ningxia, enhancing its regional grid layout and bolstering power supply for Shizuishan's development.

Construction began in November 2024 in Huinong district, encompassing four components: the new Fengsui 750kV substation, Shahu substation bay expansion, π-section connection of Pingluo Power Plant to Fengsui, and the Fengsui-Shahu transmission line.

The project involves 150 kilometers of transmission lines, 162 towers, and two 1,500-mega volt-ampere transformers. Towering obstacles included spans across the Yellow River and soft floodplain geology, with some foundation piles reaching depths of 55 meters.

State Grid Ningxia Electric Power Supply Co implemented standardized protocols and innovative techniques to overcome challenges. BIM technology enabled detailed planning, while multilevel inspections ensured quality control. The construction included Ningxia's first dust-proof, trackless HGIS workshop, creating a controlled environment for precise equipment installation. Proprietary methods improved accuracy and efficiency in challenging tasks, such as large-diameter busbar assembly.

Fengsui's commissioning transitions Shizuishan's grid from a peripheral node to a central hub. With a dual-loop grid structure and an initial capacity of 3 gigawatt (scalable to 6 GW), it supports regional industries like polysilicon and aligns with Ningxia's renewable energy goals. The project enhances green power integration, facilitates rural vitalization, and strengthens economic growth while setting a benchmark for future grid development.