China's state-owned electrical power enterprises administered by the central government will invest up to 400 billion yuan (63.2 billion U.S. dollars) over the next decade in Tibet and bid to give all residents in the area area access to electricity by 2015, the National Energy Administration (NEA) announced on Friday.

"Centrally administered state-owned companies should do more to help regions that remain without electricity coverage in Tibet," NEA vice chief Liu Qi said at a meeting held in Beijing.

Eleven major state-owned companies, including the State Grid and the China Huaneng Group, agreed at the meeting to provide 900 million yuan of capital assistance to Tibet during the 2011-2015 period to help with its electricity issue.

As of the end of 2011, around 500,000 people, or one fifth of the total population of Tibet, had no access to electricity.