Henan Power Transmission and Transformation Construction Co., Ltd. Advances Expansion of Lhasa ±400 kV Converter Station

Lhasa ±400 kV Converter Station

In mid-March, at an altitude of 3,850 meters on the Tibetan plateau in Linzhou County, more than 100 power grid workers from Henan intensified their efforts to install electrical equipment for the expansion of the Lhasa ±400kV Converter Station.

The Lhasa ±400 kV Converter Station, serving as the receiving terminal of the Qinghai-Tibet DC Grid Project, plays a vital role in transmitting electricity to Tibet during dry seasons and exporting Tibet’s surplus electricity during wet seasons. The project began operations in 2012. The ongoing expansion involves the addition of two 12-pulse converter valve groups and seven converter transformers, which will double the rated current from 750 to 1,500 amperes and increase the transmission capacity from 600 megawatts to 1,200 megawatts.

Workers install valve hall equipment

“This is our first time constructing a substation in a high-altitude area and also our first engagement with 12-pulse converter valve groups,” said project manager Huang Wenyi. “We must overcome the harsh natural environment while also tackling the technical challenges, which present both challenges and opportunities for us.”

Construction teams braved the harsh conditions of high altitude, extreme cold, and oxygen deprivation, tirelessly working on the plateau to advance power grid technology and ensure the project proceed smoothly.

Workers conduct a pre-installation inspection of the converter equipment