Such projects are part of a massive government program to link the power networks in all parts of Saudi Arabia, Abdullah Al Shahri, Governor of the Electricity & Co-generation Regulatory Authority (ECRA) told the London-based Saudi Arabic daily Asharqalawsat.
Another project to link Riyadh with the western Red Sea port of Jeddah with a capacity of 3,000 MW is underway and would be finished in 2017, he added.
"It has already been approved. This line will link the central region with the north and also support the Kingdom's link with Egypt."
He also said the power project, linking Riyadh and Jizan (in the south), is still under study.
"The electricity sector in Saudi Arabia is facing many challenges including the rapid growth in domestic demand of around 8 percent, which could reach 12 percent in some areas compared with 1-2 percent in industrial nations. This growth requires massive and quick investments," he said, adding that heavy government subsidies to the power sector is one of the main reasons for the high growth in consumption.
In June, Saudi Arabia and Egypt signed an agreement to set up a common power grid with a capacity of 3,000 MW, to be completed in late 2015.
The project involves the construction of 1,250 kilometers power cables linking Medina with Cairo through Tabuk near the border with Jordan.