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Exercise 16 Three-Phase Circuit Calculators Computing true power, or watts, in a 3 system Given: 1212,3%...
Section 2: Three phase circuit Three phase wye connected generator supplies two parallel loads through a...
Section 2: Three phase circuit Three phase wye connected generator supplies two parallel loads through a feeder. Load 1 Is an unbalanced wye connected load and load 2 is a balanced delta connected load. System data: Generator: Sg = 600 MVA; vg-11-25KV; Xg = 11896; Feeder: Z (0.08+j0.62) Ω/mile, length-8 miles Load 1: VII = 24KV, Pa =75MW Pb 75MW Pc=75MW pf_a=0.8 pf b 0.84 pf_c=0.78 Load 2: VIl-24KV; P total-225MW, pf 0.8; (all the power factor is supposed to...
1. [20 points] Choose the right answer. a) If phase current of a wye-connected three-phase system...
1. [20 points] Choose the right answer. a) If phase current of a wye-connected three-phase system is equal to Ipu, then the line current of the same system is equal to V3 pu. i. True ii. False b) A synchronous generator is supplying power to a load with unity power factor at 60 Hz. The load is suddenly disconnected (tripped). What would happen to the internal generated voltage, EA? i. Same as before ii. Increase iii. Decrease c) What is...
The three figures below show a balanced three phase Delta, its Wye equivalent and the single...
The three figures below show a balanced three phase Delta, its Wye equivalent and the single phase equivalent of the three phase Wye. All three representations have a complex load ZALD or ZYLD and a complex line impedance ZLINE Refer to these diagrams when answering questions 1-4. ZLINE Vab= 679 L 30° ZLINE ZALD ZLINE = 2+1 DELTA ZALD= 18+24j2 LINE ZLINE ZLINE ZYLD 7yun WYE WYE ZYLD ZLINE ZLINE Van Complex Load ZYLD Single Line WYE 1) In the...
2. Consider the given 3-phase circuit. Assume the load voltage, PAB = 30L30, Kms (3) Are...
2. Consider the given 3-phase circuit. Assume the load voltage, PAB = 30L30, Kms (3) Are the loads connected in Wye or Delta configuration? Explain your selection. b. a. (3) Are the sources connected in Wye or Delta configuration? Explain your selection. (5) Draw the single-phase equivalent of the given circuit. Label the line-to-neutral voltage numerically. c. d. (4) Calculate the rms line current phasor in each phase. e. (5) Calculate the rms source voltage phasor in each phase. f...
Problem #2: (40 points) The three-phase power and line- given below line ratings of the electric ...
Problem #2: (40 points) The three-phase power and line- given below line ratings of the electric power system shown are G:60 MVA, 20 kV, X = 9% Tr 50 MVA. 20/200 kV.x 1096 T2: 50 MVA, 20020 kV, X 10% M: 43.2 MVA, 18 kV, X 8% Line: 200 kV, Z 120+j200 Ti Line 00-MVA 1. Draw an impedance diagram showing all impedances in per-unit on a1 2. The motor is drawing 40 MVA, 0.8 power factor lagging at a...
Q1. Design a three-phase balanced power system where the load is connected with the power supply...
Q1. Design a three-phase balanced power system where the load is connected with the power supply through a resistive transmission line. Your design needs to meet the following criteria: 1. Phase sequence for the power supply is ACB. You can take any phase or line as reference. 2. For the power supply, the line and phase voltages are related by a factor of V3. Please do not ignore the phase shift between the line and phase voltage or current. 3....
QUESTION 1 In the circuit shown below a three-phase, three-wire, Y-connected power system is driving a...
QUESTION 1 In the circuit shown below a three-phase, three-wire, Y-connected power system is driving a A-connected load. The generator line-to-line voltages are 150 V. The impedance of each phase of the load consists of a 6- resistance and a 8-inductive reactance. Determine the magnitude of the line current IA (in A). (Enter your answer as a decimal number without the units.) 3a, 3 wire Y-winacted generator Pane e ABC B! 150 V20
Exercise 2: (7marks) um voltage three-phase line delivering St5MVA with cosp = 0.928 ogging. Teeds a...
Exercise 2: (7marks) um voltage three-phase line delivering St5MVA with cosp = 0.928 ogging. Teeds a balanced three-phase lood that consumes an active power and imposes a power factor of 0.938 lagging (Figure 2) Each line wire has resistance R=2.43 and inductance L - 11.2 MH. The effective (RMS) phase-to-phase voltage at the starting of the line is 0o = 21.0 kV The frequency of the voltage is 50 Hz. The purpose of the problem is to calculate the drop...
Fig Qshows the one-line diagram of a three-phase power system. As shown in Fig. Q3. the...
Fig Qshows the one-line diagram of a three-phase power system.
As shown in Fig. Q3. the two zones are connected by a 400 MVA,
240-kV/24-kV, Ý-A three phase transformer. The Y-A three phase
transfonmer has an equivalent series impedance of ZTH - 1.2 + j1.6n
per phase referred to the high voltage side (primary side). The
three-phase power system can be studied with per unit quantities
using base values of S-500 MVA and 240 kV in zone 1.
By using...
12. For a three-phase balanced system, a generator serves a remote load through two parallel tran...
12. For a three-phase balanced system, a generator serves a remote load through two parallel transmission lines with 4 transformers. The system parameters are as follows: Generator: T1: (A-Y, with Y side voltage leading) T2: (A-Y, with Y side voltage leading) T3: (A-Y, with Y side voltage leading) T4: (A-Y, with Y side voltage leading) Line-1 Line-2 Load 100MVA, 21kV, x-0.15pu 120MVA, 20Д/165Y kV, x-O.12pu 80MVA, 20A/1 10Y kV, x-O.1pu 120MVA, 165A/33Y kV, x-0.12pu 80MVA, 11ОД/33Y kV, x-O.1pu 30+j100 O...
Section 2: Three phase circuit Three phase wye connected generator supplies two parallel loads through a feeder. Load 1 Is an unbalanced wye connected load and load 2 is a balanced delta connected load. System data: Generator: Sg = 600 MVA; vg-11-25KV; Xg = 11896; Feeder: Z (0.08+j0.62) Ω/mile, length-8 miles Load 1: VII = 24KV, Pa =75MW Pb 75MW Pc=75MW pf_a=0.8 pf b 0.84 pf_c=0.78 Load 2: VIl-24KV; P total-225MW, pf 0.8; (all the power factor is supposed to...
1. [20 points] Choose the right answer. a) If phase current of a wye-connected three-phase system is equal to Ipu, then the line current of the same system is equal to V3 pu. i. True ii. False b) A synchronous generator is supplying power to a load with unity power factor at 60 Hz. The load is suddenly disconnected (tripped). What would happen to the internal generated voltage, EA? i. Same as before ii. Increase iii. Decrease c) What is...
The three figures below show a balanced three phase Delta, its Wye equivalent and the single phase equivalent of the three phase Wye. All three representations have a complex load ZALD or ZYLD and a complex line impedance ZLINE Refer to these diagrams when answering questions 1-4. ZLINE Vab= 679 L 30° ZLINE ZALD ZLINE = 2+1 DELTA ZALD= 18+24j2 LINE ZLINE ZLINE ZYLD 7yun WYE WYE ZYLD ZLINE ZLINE Van Complex Load ZYLD Single Line WYE 1) In the...
2. Consider the given 3-phase circuit. Assume the load voltage, PAB = 30L30, Kms (3) Are the loads connected in Wye or Delta configuration? Explain your selection. b. a. (3) Are the sources connected in Wye or Delta configuration? Explain your selection. (5) Draw the single-phase equivalent of the given circuit. Label the line-to-neutral voltage numerically. c. d. (4) Calculate the rms line current phasor in each phase. e. (5) Calculate the rms source voltage phasor in each phase. f...
Problem #2: (40 points) The three-phase power and line- given below line ratings of the electric power system shown are G:60 MVA, 20 kV, X = 9% Tr 50 MVA. 20/200 kV.x 1096 T2: 50 MVA, 20020 kV, X 10% M: 43.2 MVA, 18 kV, X 8% Line: 200 kV, Z 120+j200 Ti Line 00-MVA 1. Draw an impedance diagram showing all impedances in per-unit on a1 2. The motor is drawing 40 MVA, 0.8 power factor lagging at a...
Q1. Design a three-phase balanced power system where the load is connected with the power supply through a resistive transmission line. Your design needs to meet the following criteria: 1. Phase sequence for the power supply is ACB. You can take any phase or line as reference. 2. For the power supply, the line and phase voltages are related by a factor of V3. Please do not ignore the phase shift between the line and phase voltage or current. 3....
QUESTION 1 In the circuit shown below a three-phase, three-wire, Y-connected power system is driving a A-connected load. The generator line-to-line voltages are 150 V. The impedance of each phase of the load consists of a 6- resistance and a 8-inductive reactance. Determine the magnitude of the line current IA (in A). (Enter your answer as a decimal number without the units.) 3a, 3 wire Y-winacted generator Pane e ABC B! 150 V20
Exercise 2: (7marks) um voltage three-phase line delivering St5MVA with cosp = 0.928 ogging. Teeds a balanced three-phase lood that consumes an active power and imposes a power factor of 0.938 lagging (Figure 2) Each line wire has resistance R=2.43 and inductance L - 11.2 MH. The effective (RMS) phase-to-phase voltage at the starting of the line is 0o = 21.0 kV The frequency of the voltage is 50 Hz. The purpose of the problem is to calculate the drop...
Fig Qshows the one-line diagram of a three-phase power system.
As shown in Fig. Q3. the two zones are connected by a 400 MVA,
240-kV/24-kV, Ý-A three phase transformer. The Y-A three phase
transfonmer has an equivalent series impedance of ZTH - 1.2 + j1.6n
per phase referred to the high voltage side (primary side). The
three-phase power system can be studied with per unit quantities
using base values of S-500 MVA and 240 kV in zone 1.
By using...
12. For a three-phase balanced system, a generator serves a remote load through two parallel transmission lines with 4 transformers. The system parameters are as follows: Generator: T1: (A-Y, with Y side voltage leading) T2: (A-Y, with Y side voltage leading) T3: (A-Y, with Y side voltage leading) T4: (A-Y, with Y side voltage leading) Line-1 Line-2 Load 100MVA, 21kV, x-0.15pu 120MVA, 20Д/165Y kV, x-O.12pu 80MVA, 20A/1 10Y kV, x-O.1pu 120MVA, 165A/33Y kV, x-0.12pu 80MVA, 11ОД/33Y kV, x-O.1pu 30+j100 O...
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