China’s ultra high voltage transmission demonstration enters commercial operation


Beijing, China — (METERING.COM) — March 9, 2009 – The State Grid Corporation of China (SGCC) has announced that the 1,000 kV Jindongnan-Nanyang-Jingmen UHVAC demonstration project has entered commercial operation, following successful commissioning and trials.

The project, which was started at the end of 2006, is fully homegrown with the R&D, design and construction all accomplished by Chinese, according to the SGCC in a statement.

The SGCC said the project marks a major breakthrough by China in long distance, large capacity, low loss ultra high voltage (UHV) core technology and localization of power equipment. It is also of great significance for the optimization of energy resource allocations as well as for national energy security.

The project connects the North and Central China power grids and runs from the Jindongnan substation in Shanxi Province through the Nanyang switch station in Henan Province, and ends at the Jingmen substation in Hubei Province. The total length is 640 km and the transmission capacity at each end is 3,000 MVA. Shanxi in the north is abundant in coal while Hubei is abundant in hydro power, and the project will seek to allocate the power generated from these two sources in an effective way, as well as realize trans-basin power compensation and achieve peak demand adjustment.

The SGCC said that during the construction period independent innovation was a priority, with in-depth research was carried out on more than 200 key ultra high voltage technical issues. Breakthroughs were made in the areas of voltage standards, the electromagnetic environment, overvoltage and insulation coordination, reactive voltage control, and large grid operation and control, among others.

Several countries, including Russia, Japan and Italy, have experimented with ultra high voltage transmission but so far none of these use the technology commercially.

In an interview with Associated Press, the SGCC said it expects to spend up to 100 billion yuan ($14.6 billion) over the next three to four years on ultra high voltage lines to link Beijing, Shanghai and other eastern cities to the generation facilities in the north and southwest.

Cheng Mengrong, deputy director-general of SGCC’s international department, was quoted as saying that the Corporation would be pleased to share the technology with the international market, and possible customers could include India, Brazil and South Africa.