TNSP environmental variables Our shortlist of environmental variables is based on the shortlist recommended by Economic Insights. We have also included one additional terrain factor that accounts for difficult terrain. Table A.11 TNSP environmental variables shortlist Variable Definition Source Weather factors Number of extreme heat days (average temperature Extreme heat days BoM above 25°C) Number of extreme cold days (average temperature Extreme cold days BoM below 12°C) Extreme wind days Number of days with peak wind gusts over 90 km/hour BoM Average recorded wind speeds for a representative Average wind speed BoM sample of weather stations Terrain factors Number of days with over 50 per cent of service area Bushfire risk BoM and FAs subject to severe or higher bushfire danger rating Percentage of route-line length classified as short rural Rural proportion RIN or long rural Percentage of route-line length requiring active Vegetation growth and encroachment TNSPs vegetation management by the TNSP Proportion of network that does not have standard Standard vehicle access TNSPs vehicle access Altitude Percentage of circuit line length above 600 metres TNSPs Network characteristics Line length Route length of lines IDR Proportion of energy dispatch from non-thermal Variability of dispatch TNSPs generators Greatest distance from node having at least 30 per cent Concentrated load distance TNSPs of generation capacity to node.
TNSP environmental variables Our shortlist of environmental variables is based on the shortlist recommended by Economic Insights. We have also included one additional terrain factor that accounts for difficult terrain. Table A.11 TNSP environmental variables shortlist Variable Definition Source Weather factors Extreme heat days Number of extreme heat days (average temperature above 25°C) BoM Extreme cold days Number of extreme cold days (average temperature below 12°C) BoM Extreme wind days Number of days with peak wind gusts over 90 km/hour BoM Average wind speed Average recorded wind speeds for a representative sample of weather stations BoM Terrain factors Bushfire risk Number of days with over 50 per cent of service area subject to severe or higher bushfire danger rating BoM and FAs Rural proportion Percentage of route-line length classified as short rural or long rural RIN Vegetation growth and encroachment Percentage of route-line length requiring active vegetation management by the TNSP TNSPs Standard vehicle access Proportion of network that does not have standard vehicle access TNSPs Altitude Percentage of circuit line length above 600 metres TNSPs Network characteristics Line length Route length of lines IDR Variability of dispatch Proportion of energy dispatch from non-thermal generators TNSPs Concentrated load distance Greatest distance from node having at least 30 per cent of generation capacity to node. TNSPs
AER%20Explanatory%20statement%20-%20draft%20expenditure%20forecast%20assessment%20guideline%20-%20August%202013.DOCX