Transmission & Distribution Technology
where the centres of power consumption are often far from power sources.
Also in China, the world’s first 660kV direct
current power transmission system has begun to supply energy from the country’s northwest Ningxia Hui autonomous region to the eastern Shandong province. Te US$1.58billion (€1.13billion) project is part of
China’s west-east power transmission programme. Te cable system has a current-carrying capacity of 4millionkW of electricity travelling over a distance of 1333km through five provinces and regions. To generate the same amount of electricity, about 13million tonnes of coals would be needed along with 650 000 20tonne delivery trucks. China’s coal resources are mainly based in the west
and north, which are economically underdeveloped compared with the east. Te west-east power transmission programme started in 2000. Te country’s State Grid Corporation plans to build six cable systems, including three west-east facilities and three north-south systems, between 2011 and 2015.
US integration Prairie Wind Transmission, a joint venture between Westar Energy and Electric Transmission America, has filed a siting permit application with the Kansas Corporation Commission (KCC) to request permission to build a new, double circuit 345 kV transmission line. Te proposed line would go from Westar Energy’s Wichita 345 kV substation, about one mile northeast of Colwich, to a new substation just east of Medicine Lodge, Kansas, and then south to the Kansas-Oklahoma border. Oklahoma Gas and Electric (OGE) will continue the line from the Kansas- Oklahoma border to its Woodward substation, about ten miles south of Woodward, Oklahoma. Te project is part of the Y-Plan that the Southwest
Power Pool approved last year. Tis high-capacity transmission line will improve the regional electric grid by better integrating the east and west regions and facilitating the addition of renewable generation to the electric grid. Late last year and early this year, Prairie Wind
Transmission conducted six open houses to exchange information with landowners near several routes being considered for the transmission line. About 294 completed questionnaires were received from landowners and area residents who attended open houses or contacted Prairie Wind Transmission regarding the line. With the KCC’s approval expected in late June
2011, Prairie Wind transmission will begin working with landowners to acquire easements in the July- August 2011 time frame. Once easements have been acquired, construction is estimated to begin in the summer of 2012. Te company anticipates the project will be complete at the end of 2014. Prairie Wind currently estimates that it will cost about US$225 million (€161million). ●
Circle 17 or ✔ at
www.engineerlive.com/ipe
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