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| author | priyanka | 2015-06-24 15:03:17 +0530 |
|---|---|---|
| committer | priyanka | 2015-06-24 15:03:17 +0530 |
| commit | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (patch) | |
| tree | ab291cffc65280e58ac82470ba63fbcca7805165 /1820/CH5/EX5.15/Example5_15.sce | |
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diff --git a/1820/CH5/EX5.15/Example5_15.sce b/1820/CH5/EX5.15/Example5_15.sce new file mode 100755 index 000000000..95fe702ba --- /dev/null +++ b/1820/CH5/EX5.15/Example5_15.sce @@ -0,0 +1,63 @@ +// ELECTRIC POWER TRANSMISSION SYSTEM ENGINEERING ANALYSIS AND DESIGN
+// TURAN GONEN
+// CRC PRESS
+// SECOND EDITION
+
+// CHAPTER : 5 : UNDERGROUND POWER TRANSMISSION AND GAS-INSULATED TRANSMISSION LINES
+
+// EXAMPLE : 5.15 :
+clear ; clc ; close ; // Clear the work space and console
+
+// GIVEN DATA
+L = 50 ; // length of transmission line in km
+P_l_oh = 820 ; // Power loss at peak load for overhead transmission line in kW/km
+P_l_g = 254 ; // Power loss at peak load for gas insulated transmission line in kW/km
+cost_kwh = 0.10 // cost of electric energy in $ per kWh
+lf_ann = 0.7 ; // Annual load factor
+plf_ann = 0.7 ; // Annual Power loss factor
+h_yr = 365*24 ; // Time in Hours for a year
+total_invest = 200000000 ; // Investment cost of GIL in $ ( for case (j) )
+
+// CALCULATIONS
+// For case (a)
+Power_loss_OHline = P_l_oh * L ; // Power loss of overhead line at peak load in kW
+
+// For case (b)
+Power_loss_GILline = P_l_g * L ; // Power loss of gas-insulated transmission line at peak load in kW
+
+// For case (c)
+energy_loss_OH = Power_loss_OHline * h_yr ; // Total annual energy loss of OH line at peak load in kWh/yr
+
+// For case (d)
+energy_loss_GIL = Power_loss_GILline * h_yr ; // Total annual energy loss of GIL at peak load in kWh/yr
+
+// For case (e)
+energy_ann_OH = lf_ann * energy_loss_OH ; // Average energy loss of OH line at peak load in kWh/yr
+
+// For case (f)
+energy_ann_GIL = lf_ann * energy_loss_GIL ; // Average energy loss of GIL line at peak load in kWh/yr
+
+// For case (g)
+cost_ann_OH = cost_kwh * energy_ann_OH ; // Average annual cost of losses of OH line in $ per year
+
+// For case (h)
+cost_ann_GIL = cost_kwh * energy_ann_GIL ; // Average annual cost of losses of GIL line in $ per year
+
+// For case (i)
+P_loss_ann = cost_ann_OH - cost_ann_GIL ; // Annual resultant savings of losses per yr
+
+// For case (j)
+break_period = total_invest/P_loss_ann ; // Payback period if GIL alternative period is selected
+
+// DISPLAY RESULTS
+disp("EXAMPLE : 5.15 : SOLUTION :-") ;
+printf("\n (a) Power loss of Overhead line at peak load , (Power loss)_OH_line = %d kW \n",Power_loss_OHline) ;
+printf("\n (b) Power loss of Gas-insulated transmission line , (Power loss)_GIL_line = %d kW \n",Power_loss_GILline) ;
+printf("\n (c) Total annual energy loss of Overhead transmission line at peak load = %.4e kWh/yr \n",energy_loss_OH) ;
+printf("\n (d) Total annual energy loss of Gas-insulated transmission line at peak load = %.5e kWh/yr \n",energy_loss_GIL);
+printf("\n (e) Average energy loss of Overhead transmission line = %.5e kWh/yr \n",energy_ann_OH);
+printf("\n (f) Average energy loss of Gas-insulated transmission line at peak load = %.5e kWh/yr \n",energy_ann_GIL);
+printf("\n (g) Average annual cost of losses of Overhead transmission line = $ %.5e/yr \n",cost_ann_OH);
+printf("\n (h) Average annual cost of losses of Gas-insulated transmission line = $ %.5e/yr \n",cost_ann_GIL);
+printf("\n (i) Annual resultant savings in losses using Gas-insulated transmission line = $ %.6e/yr \n",P_loss_ann);
+printf("\n (j) Breakeven period when GIL alternative is selected = %.1f years \n",break_period);
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