As shown in the one-line diagram of a simple power system containing a single 480V generator and three loads
As shown in the one-line diagram of a simple power system containing a single 480V generator and three loads. Assume the transmission line is lossless. If Load 1 is Y connected, Load 2 and Load 3 are Δ connected, find out load per phase impedance, and sketch the per phase equivalent circuit.
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As shown in the one-line diagram of a simple power system containing a single 480V generator and three loads
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...
the single-line diagram of a three-phase power system is shown in figure 9.17. equipment ratings are...
the single-line diagram of a three-phase power system is shown in figure 9.17. equipment ratings are given as follows: The inductor connected to Generator 3 neutral has a reactance of 0.05 per unit using generator 3 ratings as a base. Draw the zero-, positive-, and negative-sequence reactance diagrams using a 1000-MVA, 765-kV base in the zone of line 1-2. Neglect the Δ—Y. transformer phase shifts.
(POWER SYSTEM ANALYSIS) Load + Load Figure 1. One line diagram of a three bus power...
(POWER SYSTEM ANALYSIS) Load + Load Figure 1. One line diagram of a three bus power transmission system. In Figure 1, the power flows in the transmission lines are to be found. In this system, 100 MVA and 154 kV are the base values. The generator bus, which is shown as Bus 1, is considered to be an infinite bus and the voltage magnitude and the angle are 1 and 0°, respectively. The voltages of Bus 2 and Bus 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...
Fig. Q3 shows the one-line diagram of a three-phase power system. As shown in Fig. 23,...
Fig. Q3 shows the one-line diagram of a three-phase power system. As shown in Fig. 23, the two zones are connected by a 400 MVA, 240-kV/24-kV, Y-A three phase transformer. The Y-three phase transformer has an equivalent series impedance of 2T - 1.2 + |1.6 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 So=500 MVA and 240 kV in zone 1. 2 -1.61253.15" Line...
1) Figure- generator is producing a line voltage of 480 V, and the line impedance is...
1) Figure- generator is producing a line voltage of 480 V, and the line impedance is 0.09 + j0.16 . Load 1 is Y connected, with a phase impedance of 2.5236.87° 0 and load 2 is A connected, with a phase impedance of 54-20° n. shows a three-phase power system with two loads. The A-connected 2 0.09 j0.16 n w Vca= 4802-240° V + Vab = 48020 V Vhc = 480-120° V 0.09 j0.16 0.09 j0.16 Load 1 Load 2...
Figure 2 shows a one-line diagram of a small 440-V industrial distribution system. The power system...
Figure 2 shows a one-line diagram of a small 440-V industrial distribution system. The power system supplies a constant line voltage of 440-V, and the impedance of the distribution lines is negligible. Load is a Δ-connected load with a phase impedance of 20L45°Ω, and load 2 is a Y-connected load with a phase impedance of 101-200Ω (a) Find the overall power factor of the distribution system (b) Find the total line current supplied to the distribution systenm Bus A LoadDelta...
A single line diagram of a power system is shown in Fig. 2. The system data with equipment ratings and assumed sequence reactances are given the following table. The neutrals of the generator and A-Y...
A single line diagram of a power system is shown in Fig. 2. The system data with equipment ratings and assumed sequence reactances are given the following table. The neutrals of the generator and A-Y transformers are solidly grounded. The motor neutral is grounded through a reactance Xn 0.05 per unit on the motor base. Assume that Pre-fault voltage is takin as VF-1.0 ,0° per unit and Pre- fault load current and Δ-Y transformer phase shift are neglected In the...
Problem 2:Three phase droult (42 pts) A three-phase wye connected generator ﹃plies two paral el loads...
Problem 2:Three phase droult (42 pts) A three-phase wye connected generator ﹃plies two paral el loads through a feeder. tad is matalaeeday connected load and load 2 is a balanced delta connected loed. System data: Generator: Rating S-5oo MVA; Line Voltage: Veu-25KV; Feeder impedance: 7-(0.08 jo 62) O/mile, length-8 miles Generator reactance Xe- 1108: P.-75MW pf c-o.78 (all the power factors are lagging) (a) Draw the one-line diagram and a three-phase equivalent circuit (8pts) (b) Calculate the generator and feeder...
Figure 1 shows a single-line diagram of a three phase, 60-Hz, synchronous generator, connected th...
Figure 1 shows a single-line diagram of a three phase, 60-Hz, synchronous generator, connected through a transformer and parallel transmission lines to an infinite bus. All reactances are given in per unit on a common system base. In steady state, the infinite bus receives 1.0 per unit real power at 0.95 power factor lagging. The generator in Figure 1 is initially operating in steady state, when circuit breaker B12 inadvertently opens. Use the equal area criterion to calculate the maximum...
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...
the single-line diagram of a three-phase power system is shown in figure 9.17. equipment ratings are given as follows: The inductor connected to Generator 3 neutral has a reactance of 0.05 per unit using generator 3 ratings as a base. Draw the zero-, positive-, and negative-sequence reactance diagrams using a 1000-MVA, 765-kV base in the zone of line 1-2. Neglect the Δ—Y. transformer phase shifts.
(POWER SYSTEM ANALYSIS) Load + Load Figure 1. One line diagram of a three bus power transmission system. In Figure 1, the power flows in the transmission lines are to be found. In this system, 100 MVA and 154 kV are the base values. The generator bus, which is shown as Bus 1, is considered to be an infinite bus and the voltage magnitude and the angle are 1 and 0°, respectively. The voltages of Bus 2 and Bus 3...
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...
Fig. Q3 shows the one-line diagram of a three-phase power system. As shown in Fig. 23, the two zones are connected by a 400 MVA, 240-kV/24-kV, Y-A three phase transformer. The Y-three phase transformer has an equivalent series impedance of 2T - 1.2 + |1.6 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 So=500 MVA and 240 kV in zone 1. 2 -1.61253.15" Line...
1) Figure- generator is producing a line voltage of 480 V, and the line impedance is 0.09 + j0.16 . Load 1 is Y connected, with a phase impedance of 2.5236.87° 0 and load 2 is A connected, with a phase impedance of 54-20° n. shows a three-phase power system with two loads. The A-connected 2 0.09 j0.16 n w Vca= 4802-240° V + Vab = 48020 V Vhc = 480-120° V 0.09 j0.16 0.09 j0.16 Load 1 Load 2...
Figure 2 shows a one-line diagram of a small 440-V industrial distribution system. The power system supplies a constant line voltage of 440-V, and the impedance of the distribution lines is negligible. Load is a Δ-connected load with a phase impedance of 20L45°Ω, and load 2 is a Y-connected load with a phase impedance of 101-200Ω (a) Find the overall power factor of the distribution system (b) Find the total line current supplied to the distribution systenm Bus A LoadDelta...
A single line diagram of a power system is shown in Fig. 2. The system data with equipment ratings and assumed sequence reactances are given the following table. The neutrals of the generator and A-Y transformers are solidly grounded. The motor neutral is grounded through a reactance Xn 0.05 per unit on the motor base. Assume that Pre-fault voltage is takin as VF-1.0 ,0° per unit and Pre- fault load current and Δ-Y transformer phase shift are neglected In the...
Problem 2:Three phase droult (42 pts) A three-phase wye connected generator ﹃plies two paral el loads through a feeder. tad is matalaeeday connected load and load 2 is a balanced delta connected loed. System data: Generator: Rating S-5oo MVA; Line Voltage: Veu-25KV; Feeder impedance: 7-(0.08 jo 62) O/mile, length-8 miles Generator reactance Xe- 1108: P.-75MW pf c-o.78 (all the power factors are lagging) (a) Draw the one-line diagram and a three-phase equivalent circuit (8pts) (b) Calculate the generator and feeder...
Figure 1 shows a single-line diagram of a three phase, 60-Hz, synchronous generator, connected through a transformer and parallel transmission lines to an infinite bus. All reactances are given in per unit on a common system base. In steady state, the infinite bus receives 1.0 per unit real power at 0.95 power factor lagging. The generator in Figure 1 is initially operating in steady state, when circuit breaker B12 inadvertently opens. Use the equal area criterion to calculate the maximum...
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