In this paper, a method to calculate the slope of the ratio restraint characteristic of a transformer differential relay protection is proposed. The method allo
<正>On March 21 st 2012,two 296-meter-high towers,the highest in South America,o cially started assembling at Brazilian 500-kV Spanning-Amazon Transmission Proj
The main technic and economic indices for carbon dioxide emission reduction of Chinese electric power industry are designed systematically in this paper.Accordi
Being abundant in hydropower, coal, wind energy and solar energy etc., Northwest China is an important energy base with great potential. In recent years, along
<正>A company a liated with the State Grid announced on July 4th it would invest 61.5 billion Yuan($9.72 billion)between 2011 and 2015 to build transmission lin