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| author | prashantsinalkar | 2017-10-10 12:27:19 +0530 |
|---|---|---|
| committer | prashantsinalkar | 2017-10-10 12:27:19 +0530 |
| commit | 7f60ea012dd2524dae921a2a35adbf7ef21f2bb6 (patch) | |
| tree | dbb9e3ddb5fc829e7c5c7e6be99b2c4ba356132c /3472/CH36/EX36.2/Example36_2.sce | |
| parent | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (diff) | |
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initial commit / add all books
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| -rw-r--r-- | 3472/CH36/EX36.2/Example36_2.sce | 34 |
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diff --git a/3472/CH36/EX36.2/Example36_2.sce b/3472/CH36/EX36.2/Example36_2.sce new file mode 100644 index 000000000..6bea3a190 --- /dev/null +++ b/3472/CH36/EX36.2/Example36_2.sce @@ -0,0 +1,34 @@ +// A Texbook on POWER SYSTEM ENGINEERING
+// A.Chakrabarti, M.L.Soni, P.V.Gupta, U.S.Bhatnagar
+// DHANPAT RAI & Co.
+// SECOND EDITION
+
+// PART III : SWITCHGEAR AND PROTECTION
+// CHAPTER 10: PROTECTION OF TRANSMISSION LINE, SHUNT INDUCTORS AND CAPACITORS
+
+// EXAMPLE : 10.2 :
+// Page number 648
+clear ; clc ; close ; // Clear the work space and console
+
+// Given data
+CT_ratio = 300.0/5 // CT ratio
+PT_ratio = 166000.0/110 // PT ratio
+Z_AB = complex(40.0,160.0) // Section AB impedance(ohm)
+Z_BC = complex(7.5,15.0) // Section BC impedance(ohm)
+kV_hv = 166.0 // HV side voltage(kV)
+kV_lv = 33.0 // LV side voltage(kV)
+MVA = 5.0 // Transformer rating(MVA)
+X_T = 6.04 // Transformer reactance(%)
+
+// Calculations
+Z_T = %i*10*X_T*kV_hv**2/(MVA*1000) // Tranformer impedance(ohm)
+Z_fault = Z_AB+Z_T // Fault impedance(ohm)
+Z_sec = Z_fault*CT_ratio/PT_ratio // Relay setting for primary protection(ohm)
+Z_BC_hv = Z_BC*(kV_hv/kV_lv)**2 // Z_BC on 166 kV base(ohm)
+Z = Z_AB+Z_T+Z_BC_hv // For backup protection of line BC(ohm)
+Z_sec_set = Z*CT_ratio/PT_ratio // Relay setting(ohm)
+
+// Results
+disp("PART III - EXAMPLE : 10.2 : SOLUTION :-")
+printf("\nImpedance seen by relay = (%.f + %.fj) ohm", real(Z_fault),imag(Z_fault))
+printf("\nRelay setting for high speed & backup protection = (%.1f + %.2fj) ohm", real(Z_sec_set),imag(Z_sec_set))
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