The variable cost function of the TCt (0.0007x2 + 12.483x) is obtained
using regression analysis by calculating for different distance
options. The function’s R2 value is obtained as 1 which can be accepted
reasonable. Here, x is the transmission line length as meter.
In other words, it is the distance from the network where the hybrid
system is installed. Since, the cost function is nonlinear, when the
distance from the transmission line of the location increases, then
the extension cost of the transmission line increases as polynomial.
TC ¼ 0:0007x2 þ 12:483x þ 8011:64 þ ð0:1ð0:0007x2 þ 12:483x
þ8011:64ÞÞ þ 40900 5000Þ ð13Þ
In Eq. (13), 8011.64 is the fixed cost of the extension of the transmission
line which is calculated from the Table 7 of the fixed cost
column. The economical life of the extended transmission line is
considered as 40 years. And, the estimated annual maintenance cost
is assumed as 10% of the initial investment cost of the transmission
line which is ‘‘0.1 * (0.0007x2 + 12.483x + 8011.64)” part in Eq. (13).
In addition, expected annual electricity consumption costs are $900
per year. And the total salvage value for grid connected system is
expected as $5000.
The variable cost function of the TCt (0.0007x2 + 12.483x) is obtainedusing regression analysis by calculating for different distanceoptions. The function’s R2 value is obtained as 1 which can be acceptedreasonable. Here, x is the transmission line length as meter.In other words, it is the distance from the network where the hybridsystem is installed. Since, the cost function is nonlinear, when thedistance from the transmission line of the location increases, thenthe extension cost of the transmission line increases as polynomial.TC ¼ 0:0007x2 þ 12:483x þ 8011:64 þ ð0:1ð0:0007x2 þ 12:483xþ8011:64ÞÞ þ 40900 5000Þ ð13ÞIn Eq. (13), 8011.64 is the fixed cost of the extension of the transmissionline which is calculated from the Table 7 of the fixed costcolumn. The economical life of the extended transmission line isconsidered as 40 years. And, the estimated annual maintenance costis assumed as 10% of the initial investment cost of the transmissionline which is ‘‘0.1 * (0.0007x2 + 12.483x + 8011.64)” part in Eq. (13).In addition, expected annual electricity consumption costs are $900per year. And the total salvage value for grid connected system isexpected as $5000.
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