EHV/UHV Case Library
Case Library

EHV/UHV Case Library

Real-world performance data from EHV and UHV projects worldwide — from ±800kV HVDC converter stations to 1000kV AC transmission lines, with up to 18 years of documented field service.

±1100kVHighest Voltage
18 YrsLongest Tracked
0Quality Failures
100+Countries Served

EHV/UHV Case Studies

Discover how SHEMAR's advanced insulation solutions have been successfully implemented in high-voltage and ultra-high-voltage projects worldwide

750 kV

750 kV Full-Composite Substation External Insulation Solution

The 750 kV Shazhou Substation serves as the hub for the second 750 kV transmission connecting Xinjiang with the Northwest main grid. Located in Dunhuang, China, the site sits on a Gobi desert terrain.

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1000 kV

1000 kV Substation External Insulation Solution

The 1000 kV Ganzi Substation, situated on the western Sichuan Plateau above 11,483 feet, is among the world's highest ultra-high voltage AC substations.

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±800 kV

±800 kV Converter Station External Insulation Solution

The Xiangjiaba ±800 kV Converter Station is located in China's Yunnan Province. The project employs ±800kV ultra high voltage direct current technology.

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±800 kV

±800 kV Busbar Post External Insulation Solution

Commissioned in 2009, the Yunnan-Guangdong ±800 kV UHV DC Transmission Project is the world's first of its kind and a major milestone in China's power grid development.

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High-Altitude

High-Altitude & Strong UV Composite External Insulation Power Transmission Solution

Qinghai-Tibet ±400kV DC Project: The highest-altitude large-scale DC transmission project ever built, reaching 17,140 feet above sea level with 87% of the line above 13,123 feet.

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±800 kV

±800 kV Transmission Line External Insulation Solution

Comprehensive composite insulator solution for ±800kV UHVDC transmission lines, featuring optimized creepage distance, superior pollution resistance, and long-term reliability in harsh environments.

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