= For the power system shown below, all reactances are given to the same base 100MVA and 33 KV. A (L-L) fault occurs on bus 2. determine: 1. Draw positive, negative. zero and the Thevenin equivalent sequence reactances networks? 2. The fault current (actual magnitude), assume the fault occurs among-phases b, c? The phase voltages at fault point during fault? - 3. T₁ G 11:33 KV Pool ΔΥ Xn System Data: G, M1, M₂ T1, T2, T3 Line X1 j0.2 p.u. 10.1 p.u. 10.1 p.u. Line X₂ j0.2 p.u. j0. 1. p.u. j0.1 p.u. 1-3 T2 33: 11 KV Xo j0.1 p.u. j0.1 p.u. j0.3 p.u. T3. 33: II KV Ă M₁ M₂ , Xn ym yn Xn j0.05 p.u. (G, M₂)
= For the power system shown below, all reactances are given to the same base 100MVA and 33 KV. A (L-L) fault occurs on bus 2. determine: 1. Draw positive, negative. zero and the Thevenin equivalent sequence reactances networks? 2. The fault current (actual magnitude), assume the fault occurs among-phases b, c? The phase voltages at fault point during fault? - 3. T₁ G 11:33 KV Pool ΔΥ Xn System Data: G, M1, M₂ T1, T2, T3 Line X1 j0.2 p.u. 10.1 p.u. 10.1 p.u. Line X₂ j0.2 p.u. j0. 1. p.u. j0.1 p.u. 1-3 T2 33: 11 KV Xo j0.1 p.u. j0.1 p.u. j0.3 p.u. T3. 33: II KV Ă M₁ M₂ , Xn ym yn Xn j0.05 p.u. (G, M₂)
Power System Analysis and Design (MindTap Course List)
6th Edition
ISBN:9781305632134
Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Chapter9: Unsymmetrical Faults
Section: Chapter Questions
Problem 9.9P
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Step 1: Stating the given data;
VIEWStep 2: (1) Calculating thevenin's equivalent of positive sequence network
VIEWStep 3: Calculating thevenin's equivalent of negative sequence reactance
VIEWStep 4: Calculating thevenin's equivalent of zero sequence reactance
VIEWStep 5: (2) Calculating current I1
VIEWStep 6: Calculating actual value of fault current
VIEWStep 7: (3) calculating the phase voltages at fault point
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