National Grid and its regulator, Ofgem, said there was little threat of blackouts or the need for other emergency measures.
Britain's second biggest energy supplier also raised new fears about future blackouts by saying it planned to close down one of its two remaining coal-fired power stations by March next year.
For the 40% of Nigerians connected to the power grid, there are constant concerns of price hikes and frequent blackouts.
Rachel Fletcher, Ofgem's senior partner for markets, said: "The message from this seminar is that there is no increased risk of blackouts".
Between 2013 and the end of 2014, the government imposed more than 20 news blackouts on important stories, on various grounds including national security.
Anthony Nelson, who served in Sir John Major's government, said people should not listen to the scare stories put out by energy companies, who claim the plans could lead to blackouts.
Meanwhile, the risk of brief summertime blackouts could rise: hydroelectric plants often are called upon to help urban power grids deal with sudden spikes in demand.
The domestic economy is characterised by widespread corruption, mismanagement and unemployment, and many areas of the country endure blackouts on a regular basis.
She got her first professional engagement with the touring company of Hellzapoppin, where she had little to do but appear in stunning gowns in a series of comedy blackouts.
Sceptics argued that its reliance on micropower would cause more blackouts.
In Gurgaon, a suburb of Delhi popular with western firms, the traffic congestion, power failures and communications blackouts make it difficult for residents to live and work comfortably.
