Clwyd South MP Susan Elan Jones has given her full support to a Labour Party commitment to freeze gas and electricity bills until 2017.
The policy will become law if Labour wins the next general election.
At the Labour Party Conference by Labour leader Ed Miliband unveiled wide-ranging plans to overhaul the energy market and scrap regulatory body Ofgem, replacing it with a watchdog that compels companies to pass on wholesale price reductions to homes and businesses.
Ms Jones said: "This is such a sensible proposal that will really help ordinary people.
"We all know how much gas and electricity bills have gone up. This has been especially true in the last year after our so-called 'spring', which saw the worst snow in our area since the 1960s.
"The cost of gas and electricity in our country is a scandal. Since David Cameron become Prime Minister, gas and electricity bills have shot up by £300. This just isn't right at a time the energy companies are making such huge profits.
"Gas and electricity are not luxury items. It is high time we had a government who was prepared to tackle how the energy companies treat their customers. If Britain elects a Labour Government in 2015, we will have a government that is committed to doing so."