The Energy Best Deal campaign will see hundreds of workers from Citizens Advice Bureaux, Housing Associations, and other organisations trained up to offer advice.
The Department of Energy and Climate Change (DECC) is funding the scheme which is being rolled out nationally by Ofgem following a successful pilot.
Mrs Ruddock said: 'We must do as much as we can at this time of high energy prices to help people deal with their fuel bills- especially those who are the most vulnerable such as the elderly and those on low incomes.
'This new army of energy advisors that we are training will be on the frontline helping people find the best energy deal available and giving energy efficiency advice that will make a real difference to their bills, their homes and their carbon footprint.”
Training sessions for the workers will take place across the country over the next few months. The advisors will learn about savings that people can make through switching their energy deal, either to another supplier or to their existing supplier's cheapest offer.
They will also learn what help low-income customers can get from their energy suppliers and the government with their energy bills, as well as in insulating their homes and other energy efficiency measures.
Mrs Ruddock said: 'People will also find out about the government's Warm Front scheme which provides funding for insulation and other measures to help vulnerable households, as well as the excellent work of the Energy Saving Trust, which provides free help and information on energy efficiency.
“Energy efficiency helps save energy, save money and keep people warm, not just this winter but for years to come.'
Advice on energy efficiency is available from the Energy Saving Trust helpline on 0800 512 012 or at http://www.energysavingtrust.org.uk