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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/CH27/EX27.7 | |
| parent | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (diff) | |
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initial commit / add all books
Diffstat (limited to '3472/CH27/EX27.7')
| -rw-r--r-- | 3472/CH27/EX27.7/Example27_7.sce | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/3472/CH27/EX27.7/Example27_7.sce b/3472/CH27/EX27.7/Example27_7.sce new file mode 100644 index 000000000..a61e5ba94 --- /dev/null +++ b/3472/CH27/EX27.7/Example27_7.sce @@ -0,0 +1,38 @@ +// 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 1: SYMMETRICAL SHORT CIRCUIT CAPACITY CALCULATIONS
+
+// EXAMPLE : 1.7 :
+// Page number 471-472
+clear ; clc ; close ; // Clear the work space and console
+
+// Given data
+MVA_G1 = 50.0 // Generator rating(MVA)
+kV_G1 = 15.0 // Voltage rating of generator(kV)
+X_G1 = 0.2 // Reactance of generator(p.u)
+MVA_G2 = 25.0 // Generator rating(MVA)
+kV_G2 = 15.0 // Voltage rating of generator(kV)
+X_G2 = 0.2 // Reactance of generator(p.u)
+kV_T = 66.0 // Voltage rating of transformer(kV)
+X_T = 0.1 // Reactance of transformer(p.u)
+kV_fault = 66.0 // Voltage at fault occurence(kV)
+kv_base = 69.0 // Base voltage(kV)
+MVA_base = 100.0 // Base MVA
+
+// Calculations
+X_d_G1 = X_G1*MVA_base/MVA_G1 // Sub-transient reactance referred to 100 MVA(p.u)
+E_G1 = kV_fault/kv_base // Voltage(p.u)
+X_d_G2 = X_G2*MVA_base/MVA_G2 // Sub-transient reactance referred to 100 MVA(p.u)
+E_G2 = kV_fault/kv_base // Voltage(p.u)
+X_net = X_d_G1*X_d_G2/(X_d_G1+X_d_G2) // Net sub-transient reactance(p.u)
+E_g = (E_G1+E_G2)/2 // Net voltage(p.u). NOTE: Not sure how this comes
+I_fault = E_g/(%i*(X_net+X_T)) // Sub-transient fault current(p.u)
+
+// Results
+disp("PART III - EXAMPLE : 1.7 : SOLUTION :-")
+printf("\nSub-transient fault current = %.3fj p.u \n", imag(I_fault))
+printf("\nNOTE: Changes in the obtained answer from that of textbook is due to more precision here")
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