February 11, 2015

According to an official, China is willing to share its experience in developing a long-distance power transmission technology known as ultra-high voltage (UHV) grid with other countries. China has “comprehensively mastered the core technologies of UHV transmission with independent intellectual property rights,” said Liang Xu Ming, director of executive director office of the State Grid Corporation of China (SGCC),

“We would like to share the UHV innovations with all countries to make contributions to the sustainable development of human society,” liang said at the launching ceremony of the English version of a book titled “Ultra-High Voltage AC/DC Grid”.

Liang said his company has overcome technical difficulties such as voltage control, external insulation configuration and electromagnetic environment since it decided to build UHV grip in 2004.

UHV, defined as voltage of 1,000 kilovolts or above in alternating current (AC) and 800 kilovolts or above in direct current (DC), is designed to deliver large quantities of power over long distances with less power loss than the most commonly used 500-kilovolt line.

By the end of 2014, the SGCC has built three AC and four DC projects, Liang said, adding that the transmission lines in operation and under construction have reached 15,000 kilometers in length with the transmission or conversion capacity of 150 gigavolt-amperes and have delivered over 280 terawatthours of electricity.

He also revealed that a consortium embracing the SGCC and the Brazilian Electric Power Company won a bid last year to build a 2,000 km-long UHV line transmitting hydropower from the Belo Monte Dam, the world’s third largest hydroelectric dam scheduled for completion in 2015, to Brazil’s developed regions in the south and southeast.