State Grid Corporation of China
In 2003 and progressively so through the early 2000s, electrical shortages caused the government to institute rolling blackouts. The State Grid Corporation estimated there were 1 trillion yuan in losses from 2002 to 2005. The State Grid Corporation of China ran the first 1,000-kilovolt alternating current power line between Northern Shanxi and center Hubei in January 2009. In 2012 it began operation of an 800-kilovolt direct current line that sends hydropower from western Sichuan to Shanghai. It also has an alternating current loop line in the Yangtze River delta, and three longitudinal alternating current lines that bring power to Southern China from the Northern region.