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Landscape of Qingjiang Gallery,located in Yichang,Hubei,China
Customer Success Story

Geheyan hydropower plant, Qingjiang Hydropower Development Company Limited, China

Upgrading aging substation to boost efficiency and asset utilization

The Geheyan hydropower plant owned by Qingjiang Hydropower Development Company Limited, is built on the Qingjiang River, a tributary of the Yangtze River. With an installed capacity of 1.2 gigawatt (GW), the plant plays an important role in central China’s social, economic and environmental development and is contributing to country’s long-term goal of becoming carbon-neutral.

Operational since 1994, the Geheyan hydropower plant is the backbone power plant for peak load shifting and frequency regulation in central China’s power system. Its continuous and trouble-free operations is critical for stable power supply in the region.

To ensure the aging power plant continues to operate smoothly, Hitachi Energy  will modernize the ageing substation using

·       State-of-the-art, 550- kilovolt(kV) and 220kV gas-insulated switchgear (GIS)

·       Online monitoring solution for improved reliability

The equipment upgrade using latest technology will greatly enhance the reliability of the power plant and minimize power losses as well as reduce fixed asset investment.

Main data
Year of installation 2021
GIS types ELK-3 ELK-14
Rated Voltage 550kV  252 kV
Rated Current  4000A 3150A
Rated frequency 50 Hz 50 Hz
Short-circuit current 40kA for 2 seconds 31.5kA for 3 seconds

Get to know more

Watch: High-voltage service solution for key hydropower plant on the Yangtze River

Leaflet: Upgrading aging substation to boost efficiency and asset utilization