摘要
In 2005, the State Grid Corporation of China （SG） realized three historical breakthroughs： its fixed assets investment exceeded 100 billion Yuan; scale of starting construction of 220 kV and above transmission lines was in excess of 20,000 km; and newly-added transmission line at 220-kV and above voltage was nearly 20,000 kin. Moreover, pre-engineering work including a UHV experiment and a demonstration project made important phasic progresses.
