A new electric power corporation can get all the products it needs by converting all its orders into immediate ones in a single click.
The command is on the corporations page.
the tab is "Orders".
then, it can contract all the power to the country and reduce the need to purchase electric power.
also then, the country can deliver power to corporations residing in the country.
A better solution is to set up wind farms.
these are very profitable and they reduce the need to purchase power on the market.