Hitachi Energy, in collaboration with the Electricity Generating Authority of Thailand, is set to launch the world's first 550 kilovolt EconiQ Retrofill project at the Nan high-voltage substation. The project will upgrade a 130-metre gas-insulated transmission line by replacing the existing sulfur hexafluoride gas with a new eco-friendly gas mixture. It is expected to eliminate approximately 800 kilograms of SF6 gas usage, reduce greenhouse gas emissions equivalent to up to 97 tonnes, and cut climate impact by more than 95 percent without replacing the system's main equipment. The project is scheduled for completion in December 2026 and is part of Hitachi Energy's global roadmap to develop SF6-free high-voltage technology, aligning with Thailand's goal of net-zero carbon emissions by 2050.
Hitachi Energy is piloting world's first 550 kV SF6-free retrofit, a breakthrough in eco-friendly high-voltage technology.
Electricity Generating Authority of ThailandPrivate▲ Positive
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EGAT is collaborating on the project, which supports its net-zero goal and enhances its grid infrastructure.
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