Calculation of Operating Margin (OM)

Select Year to

1. Percentage share of electricity generation of low cost/must run power plants is less than 50% of total electricity generation of the exporting electricity system. Therefore simple operating margin method is used.

2. There are three options based on the data availability. Option A should be used if data is available. Option A is used

Operation Margin

Operating Margin
    2012 2013 2014 2015 2016
Emissions from Power Plants (t-CO2) 4,677,909.35 2,186,060.78 3,068,364.25 1,551,881.90 3,114,853.63
Net Electricity Generation (GWh) 6,722.15 3,259.96 4,333.46 2,276.31 4,460.64
Simple operating margin CO2 emission factor (t-CO2/MWh)
Three-year generation based weighted average 0.7035 0.6993 0.6938 0.6896 0.6987

See assumptions for calculating OM

Calculation of Build Margin (BM)


The set of power capacity additions in the electricity system that comprise 20% of the system generation (in GWh) and that have been built most recently.

Build Margin
    2012 2013 2014 2015 2016
Power Plant Emissions of power plants considered for the BM (tonnes of CO2) 2,573,387.75 1,750,265.79 1,866,221.35 3,717,903.71 4,203,018.59
Power Plant Generation of power plants considered for the BM (GWh) 3,357.53 2,433.80 2,491.54 3,693.27 4,465.70
Build margin emission factor (t-CO2/MWh) 0.7665 0.7191 0.7490 1.0067 0.9412


Calculation of Combined Margin (CM)


Combined Margin


See weighting factors for CM

Combined Margin
    2012 2013 2014 2015 2016
For solar, wind Projects 0.7192 0.7043 0.7076 0.7689 0.7593
All other Projects; 1st crediting period 0.7350 0.7092 0.7214 0.8481 0.8199
All other Projects; 2nd - 3rd crediting period 0.7508 0.7141 0.7352 0.9274 0.8806