6. An alternative method - marginal CO 2 rates The CO 2 actually saved due to a change in electricity demand is related to which power stations actually respond to that change.
11. GB Electricity Marginal Emissions 2002 to 2009 inclusive Source: Hawkes, A.D. (2010) Estimating Marginal Emissions Rates in National Electricity Systems. Energy Policy 38(10) 5977-5987. doi:10.1016/j.enpol.2010.05.053 Change in System Load (GWh/h) Change in System CO 2 Rate (ktCO 2 /h) Linear Fit: y = 0.69 x
12. Stats of the MEF Change in System Load (GWh/h) GB System Load (GW) Change in System Load (GWh/h) Change in System CO 2 Rate (ktCO 2 /h) Marginal Emissions Factor (kgCO 2 /kWh) Number of Observations Probability of System Load y = 0.69 x
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Editor's Notes
This talk is inspired by the fact that many economists hold the view that if one analyses the economics of the marginal system, they might end up with the right answer. But if one were to analyse the economics of the average system, they will definitely get the wrong answer.