HOMER Pro 3.16
Type: |
Output Variable |
Units: |
km |
Symbol: |
Dgrid |
The break-even grid extension distance is the distance from the grid that makes the net present cost of extending the grid equal to the net present cost of the stand-alone system. Farther away from the grid, the stand-alone system is optimal. Nearer to the grid, grid extension is optimal.
HOMER calculates the break-even grid extension distance using the following equation:
where: |
|
|
|
CNPC |
= total net present cost of the stand-alone power system [$] |
|
CRF() |
|
|
i |
= real discount rate [%] |
|
Rproj |
= project lifetime [yr] |
|
Edemand |
= total annual electrical demand (primary plus deferrable) [kWh/yr] |
|
cpower |
= cost of power from the grid [$/kWh] |
|
ccap |
= capital cost of grid extension [$/km] |
|
com |
= O&M cost of grid extension [$/yr/km] |
