DECC publishes estimates for the levelised costs of electricity generation for different technologies. The most recent estimates are available in the DECC Electricity Generation Costs (December 2013) report, available at:
The above levelised costs however do not take into account all of the wider positive or negative impacts that a power station may impose on the electricity system. So far, DECC’s electricity modelling has considered these wider whole system impacts through a system wide cost-benefit analysis.
To systematise DECC’s evidence base on whole system impacts and be able to present these impacts on a technology by technology basis, DECC has commissioned external research at the end of 2014. The project has three phases. Phase 1 aims to define and estimate the current impacts on the system from each technology type. Phase 2 aims to further develop DECC’s internal modelling capability to formally deal with the evolution of the whole system impacts over time and Phase 3 aims to undertake scenario analysis to assess whole system impacts of different technologies across different states of the world. The work on the project is currently still ongoing.