Tuesday, May 17, 2011

Japan has a divided electricity grid


The ability of power companies in western Japan to sell excess power to Tepco is hampered because the country is divided by grids that use different frequencies. Companies including Tepco and Tohoku Electric Power Co. transmit power to the eastern grid at a frequency of 50 hertz (cycles per second), while the rest of Japan uses 60 hertz.

Wow!  That's like dividing the country into left and right hand steering!  I just found this very interesting.


Harbles said...

Some history;
" It’s a historical accident from the 19th century, when Tokyo’s electrical entrepreneurs installed 50-Hz generators mainly from Germany, while their counterparts in Osaka selected 60-Hz equipment from the United States. " From an interesting detailed article from IEEE. so vested interests make standardizing difficult.

They have some older HVDC stations that can convert frequencies. I wonder what a reasonable capacity would be? Looks like something to add to the build it list.

Harold Asmis said...

Life must be interesting right at the borders.