Analyze power system as shown in Fig. 3 subject to (a) Line to Line bolted fault (b) Double Line to Ground Bolted Fault occurred at bus 3. Compare values of symmetrical and unsymmetrical fault currents under (a) Line to Line Bolted Fault (b) Double Line to Ground Bolted Fault. Pre-fault voltages can be assumed as 1+ 0j = 1< 0° per unit. Transformers T1 and T2 have 345 Y / 20 A KV Transformation Ratio. (1) 4 Power Plant – II Power Plant – I 3 to Generator Generator Transmission Line 1 Transformer 1 Transformer 2 Fig.3: Single Line Diagram for Faults at Bus 3. Positive, Negative and Zero sequence Z-buses are given as: [jo.19 [j0.1437 jo.1211 j0.0789 j0.0563] jo.1211 jo.1696 j0.1104 jo.0789 j0.08 jo.08 j0.08 jo.58 z(2) jo.0789 j0.1104 j0.1696 j0.1211 Ljo.0563 jo.0789 j0.01211 j0.1437] (0)- Zbus z = Zbus j0.19]
Analyze power system as shown in Fig. 3 subject to (a) Line to Line bolted fault (b) Double Line to Ground Bolted Fault occurred at bus 3. Compare values of symmetrical and unsymmetrical fault currents under (a) Line to Line Bolted Fault (b) Double Line to Ground Bolted Fault. Pre-fault voltages can be assumed as 1+ 0j = 1< 0° per unit. Transformers T1 and T2 have 345 Y / 20 A KV Transformation Ratio. (1) 4 Power Plant – II Power Plant – I 3 to Generator Generator Transmission Line 1 Transformer 1 Transformer 2 Fig.3: Single Line Diagram for Faults at Bus 3. Positive, Negative and Zero sequence Z-buses are given as: [jo.19 [j0.1437 jo.1211 j0.0789 j0.0563] jo.1211 jo.1696 j0.1104 jo.0789 j0.08 jo.08 j0.08 jo.58 z(2) jo.0789 j0.1104 j0.1696 j0.1211 Ljo.0563 jo.0789 j0.01211 j0.1437] (0)- Zbus z = Zbus j0.19]
Introductory Circuit Analysis (13th Edition)
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Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
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![Analyze power system as shown in Fig. 3 subject to (a) Line to Line bolted fault (b) Double Line to Ground
Bolted Fault occurred at bus 3. Compare values of symmetrical and unsymmetrical fault currents under
(a) Line to Line Bolted Fault (b) Double Line to Ground Bolted Fault. Pre-fault voltages can be assumed
as 1+ 0j = 1 < 0° per unit. Transformers T1 and T2 have 345 Y / 20 A KV Transformation Ratio.
Power Plant -I
4)
Power Plant – II
(2
Generator
Generator
Transmission Line
Transformer 1
Transformer 2
Fig.3: Single Line Diagram for Faults at Bus 3.
Positive, Negative and Zero sequence Z-buses are given as:
rj0.19
j0.08 jo.08
jo.08 jo.58
[j0.1437 jo.1211
j0.1211 j0.1696
jo.0789 jo.1104 jo.1696
jo.0789
j0.1104
j0.05631
j0.0789
jo.1211
z0)
bus
z9 = Zbus
=
'bus
j0.19]
Ljo.o563 jo.0789 j0.01211 j0.1437]](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F52ab008e-597d-4650-90d2-43390dd4e876%2F8d3cb675-bbf4-46c3-9bef-17c0e739f393%2F5o6ydq8_processed.png&w=3840&q=75)
Transcribed Image Text:Analyze power system as shown in Fig. 3 subject to (a) Line to Line bolted fault (b) Double Line to Ground
Bolted Fault occurred at bus 3. Compare values of symmetrical and unsymmetrical fault currents under
(a) Line to Line Bolted Fault (b) Double Line to Ground Bolted Fault. Pre-fault voltages can be assumed
as 1+ 0j = 1 < 0° per unit. Transformers T1 and T2 have 345 Y / 20 A KV Transformation Ratio.
Power Plant -I
4)
Power Plant – II
(2
Generator
Generator
Transmission Line
Transformer 1
Transformer 2
Fig.3: Single Line Diagram for Faults at Bus 3.
Positive, Negative and Zero sequence Z-buses are given as:
rj0.19
j0.08 jo.08
jo.08 jo.58
[j0.1437 jo.1211
j0.1211 j0.1696
jo.0789 jo.1104 jo.1696
jo.0789
j0.1104
j0.05631
j0.0789
jo.1211
z0)
bus
z9 = Zbus
=
'bus
j0.19]
Ljo.o563 jo.0789 j0.01211 j0.1437]
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