Asia | October 14, 2025

Hitachi Energy secures first 1100 kV GIS order in China

The project strengthens four-province AC backbone to boost power transfers and grid resilience across Central China.

 

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China, Xiamen: Hitachi Energy has received its first order for 1100 kV gas-insulated switchgear (GIS) in China, marking a major step into the country’s ultra-high-voltage (UHV) transmission market.

The GIS will be installed at the 1000 kV Nanchang UHV substation in Jiangxi Province, as part of an expansion supporting the Central China AC backbone that connects Henan, Hubei, Hunan, and Jiangxi. The project will enhance cross-provincial power transfers, grid stability, and renewable energy integration.

Commissioned in 2021, the Nanchang substation is the first of its kind in Jiangxi and a key node in China’s double-looped 1000 kV UHV grid. The expansion aims to increase the grid’s interconnection capacity, improve clean-power utilisation, and contain short-circuit current levels across the region.

Hitachi Energy’s 1100 kV GIS is engineered for high endurance, compact design, and insulation coordination, meeting the stringent performance demands of China’s UHV systems. Manufacturing will take place at the company’s high-voltage switchgear facility in Xiamen, China.

James Zhao, Executive Vice President and Region Head of Greater China at Hitachi Energy, said: “China’s systematic deployment in the UHV grid sector has laid a solid foundation for renewable energy development and secure power supply. We are honored to support the expansion of Nanchang 1000 kV UHV substation – a major milestone for Hitachi Energy’s GIS technology in the world’s highest-voltage networks.”

“This installation demonstrates the strength of our technology, enhances grid efficiency, and supports China’s transition to widespread electrification,” added Markus Heimbach, Managing Director of High Voltage Products, Hitachi Energy.

Source: Hitachi Energy