tag:blogger.com,1999:blog-19508699.post8948017478078606693..comments2024-03-13T18:55:49.391+00:00Comments on Energy Balance: British-Norwegian Power Link.Professor Chris Rhodeshttp://www.blogger.com/profile/12060542089215379056noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-19508699.post-30840551280871939422009-10-08T08:31:38.808+01:002009-10-08T08:31:38.808+01:00This is taken from wikipedia Power losses:
Transm...This is taken from wikipedia Power losses:<br /><br />Transmitting electricity at high voltage reduces the fraction of energy lost to resistance. For a given amount of power, a higher voltage reduces the current and thus the resistive losses in the conductor. For example, raising the voltage by a factor of 10 reduces the current by a corresponding factor of 10 and therefore the I^2R\,\! losses by a factor of 100, provided the same sized conductors are used in both cases. Even if the conductor size (cross-sectional area) is reduced x10 to match the lower current the I^2R\,\! losses are still reduced x10. Long distance transmission is typically done with overhead lines at voltages of 115 to 1,200 kV. At extremely high voltages, more than 2,000 kV between conductor and ground, corona discharge losses are so large that they can offset the lower resistance loss in the line conductors.<br /><br />Transmission and distribution losses in the USA were estimated at 7.2% in 1995 [14]<br /><br />As of 1980, the longest cost-effective distance for electricity was 7,000 km (4,000 miles), although all present transmission lines are considerably shorter.[2]"<br /><br />So that's about the loss over the US grid. As I understand it, the UK national grid loses about the same amount i.e. 7%.<br /><br />Regards,<br /><br />Chris.Professor Chris Rhodeshttps://www.blogger.com/profile/12060542089215379056noreply@blogger.comtag:blogger.com,1999:blog-19508699.post-38869506153090786282009-10-07T20:45:17.566+01:002009-10-07T20:45:17.566+01:00How does the electrical industry account for PD lo...How does the electrical industry account for PD losses in power supplied over long distances? Is there an industry standard under which over a certain distance a scheme would become deemed un-economic?Anonymousnoreply@blogger.com