China laid foundation for
the experimental project of Ultra High Voltage (UHV) grids in the
north, launching the country's first move to transmit power for a
long distance through 1,000-kilovolt alternating grids.
At the breaking ground ceremony held in Changzhi city
of North China's Shanxi Province on Saturday, Liu Zhenya,
general manager of the State Grid Corporation, operator of the
project, said that developing UHV grids is good for China to
distribute its natural resources in a more proper way.
The project, wandering for 653.8 kilometers and
running across China's Yellow River and the Hanjiang River, will
transmit power produced in Shanxi Province, China's largest coal
base to Nanyang city of Central China's Henan Province and then to Jingmen city of
Central China's Hubei Province.
With a planned investment of 5.7 billion yuan (US$713
million), the grid is designed to have a rated voltage of 1,000-kv,
a maximum operational voltage of 1,100 kv and a transmission power
of 5 million kw.
Over two-thirds of China's water resources are
distributed in West China's Sichuan and Yunnan provinces and the Tibet Autonomous Region, and over two-thirds
of the coal resources are found in North China's Shanxi and Shaanxi provinces and the Inner Mongolian Autonomous Region.
East and South China have the lowest reserves of
energy and other natural resources. But as they boast the most
rapid economic growth, they have the highest demand for
Harboring alternating current at 1,000 kv or direct
current at 800 kv, the UHV grids make the transmission of enough
power over a long distance possible.
However, having no successful cases so far in the
world, there have been heated discussions on whether to develop UHV
Japan and Russia have both
built 1,000-kv alternating power grids, but only for short-distance
The Chinese government finally gave admission to the
experimental project to encourage the exploration for a way to feed
the demand of energy-thirsty East and Central China by transmitting
power from energy-rich West and North China.
Liu Zhaoshao, Chief Economist of the State Grid, told
Xinhua earlier that if successful, the State Grid is also planning
to build more UHV grids transmitting power from big coal-fired
power or hydropower generators to electricity-thirsty regions from
2006 to 2010. They aim to construct a power grid which covers North
and East China by 2020.
(Xinhua News Agency August 21, 2006)