China lists problems restricting grid development

Oct 01, 2005 02:00 AM

The director of development and planning at China's State Power Grid Corporation has identified five key problems facing any further development of the national grid.
China has recently seen all of its separate grids connected with the amount of electricity transmitted across the regions growing 86 % in the past four years.

It is this scale and speed of the growth that is the first concern for the director, Du Zhigang. From 2000 to 2004, China's installed power capacity rose annually on average by 28.4 GW and the amount of power consumed in the country increased on average by 193 GWh each year. In 2004 alone, over 50 GW of new capacity was added to the grid.
There are no signs of a dramatic downturn either, according to some predictions; China's national power consumption is expected to require at least another 33 GW of capacity annually from now until 2020.

The second problem highlighted by China's national grid company is the speed of grid development and the insufficient capacity of electricity able to be exchanged between each regional grid.
Thirdly, the country has experienced short circuit electric current due to the concentration of 500 kV power grids in some areas. By 2010, it is expected that the country will have nearly 50 kVA of 500 kV short circuit electric current.

The fourth area highlighted is that it is becoming more problematic to find suitable locations for transmission projects to run through and costs are thus increasing.
Finally, Zhigang warned that China was still behind developed countries with regard to technology and equipment.

Source: Power Engineering Magazine
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