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Outcome 2. Assume you need to size voltage regulators for a distribution substation transformer. A copy...
5 Three Type B step-voltage regulators are connected in wye and located 7. on the secondary bus o...
5 Three Type B step-voltage regulators are connected in wye and located 7. on the secondary bus of a 12.47kV substation. The feeder is serving an unbalanced load. A power-flow study has been run and the voltages at the substation and the load center node are 7200/0 Vsubabc 7200/-120 V 7200/120 6890.6/-1.49 6990.5/117.05 VLCabel 6825.9/-122.90 v The currents at the substation are 362.8/-27.3 ]-395.4/-154.7 A abc 329.0/98.9 The regulator potential transformer ratio is 7200-120 and the current transformer ratio is...
(30) Assume that a distribution substation, shown below, has a 4000 kVA 69/12.47 kV LTC 4)...
(30) Assume that a distribution substation, shown below, has a 4000 kVA 69/12.47 kV LTC 4) transformer feeding a three-phase four-wire 12.47 kV distribution system. The transformer has a reactance of 0.065 pu. Assume that fault impedance is 40 Q and that the maximum and minimum power generations of the system are 600 and 360 MVA, respectively. Use 1 MVA as the three-phase power base: a) Under the maximum (system) power generation conditions, determine the available three- phase, L-L, and...
(30) Assume that a distribution substation, shown below, has a 4000 kVA 69/12.47 kV LTC 4)...
(30) Assume that a distribution substation, shown below, has a 4000 kVA 69/12.47 kV LTC 4) transformer feeding a three-phase four-wire 12.47 kV distribution system. The transformer has a reactance of 0.065 pu. Assume that fault impedance is 40 Q and that the maximum and minimum power generations of the system are 600 and 360 MVA, respectively. Use 1 MVA as the three-phase power base: a) Under the maximum (system) power generation conditions, determine the available three- phase, L-L, and...
. Two choices of substation transformers with ratings of 12/16/20 MVA and 15/20/25 MVA are availa...
draw a single-line diagram for the possible choices
. Two choices of substation transformers with ratings of 12/16/20 MVA and 15/20/25 MVA are available. Transformers have Z1-8 % at their lowest MVA rating. Each transformer is allowed to be overloaded under emergencies by 30-40 % of its maximium rating . The 12.47 kV breakers have interrupting ratings of 12 kA, 16 kA or 20 kA with respective continuous rating of 800, 1200, or 2000 A . The impedance of the...
1. In order to meet an emergency, three single-phase transformers with 12.470/7.200 V are connected in...
1. In order to meet an emergency, three single-phase transformers with 12.470/7.200 V are connected in Delta-Wye to form a three-phase transformer which is fed by a 12.470 V transmission line. If the transformer supplies 60 MVA to a load, calculate: (3 marks) a. The turns ratio for each transformer b. The currents in the primary and secondary windings of the transformer c. The primary and secondary transmission line currents 2. A Wye-Delta transformer is connected to a 66 kV...
2. The local transformer shown below provides the last voltage stepdown in a power distribution system....
2. The local transformer shown below provides the last voltage stepdown in a power distribution system. A common sight on utility poles in residential areas, it is a single-phase transformer that typically has a 13.8-LV rms line to neutral on its primary coil, and a center tap secondary coil provides both 120 Vrms and 240 Vrms to service several residences. A typical example of this transformer is shown below. Find the tums ratio necessary to produce the 240-V mms secondary...
d) Consider an ideal, single-phase 2400V-240V transformer. The primary is connected to a 2200V source and...
d) Consider an ideal, single-phase 2400V-240V transformer. The
primary is connected to a 2200V source and the secondary is
connected to an impedance of 2Ω ∠36.9o , find all the values in
Table 1.
Table 1
No
Parameters
1
The secondary output current and voltage.
2
The primary input current
3
The load impedance as seen from the primary side.
4
The input and output apparent power
5
The output power factor
e) A 30MVA 33/11 kV star-delta three phase...
Q1) Two ideal voltage sources designated as machines 1 and 2 are connected as shown in...
Q1) Two ideal voltage sources designated as machines 1 and 2 are connected as shown in Figure 1. If E! = 100.200 V, E-100し300 V and Z = 0 +JS a) Determine whether each machine is generating or consuming real power and the amount b) Determine whether each machine is receiving or supplying reactive power and the amount c) Determine the P and Q absorbed by the impedance 2 #2 Figure 1: Ideal voltage sources connected through impedance Z Q2)...
solve no: 3.14 , 3.16, 3.19 please show each step and solve for beginners 120 Power...
solve no: 3.14 , 3.16, 3.19
please show each step and solve for beginners
120 Power System Analysis 3.12. A single-phase system similar to that shown in Figure 3.11 has two transformers A-B a B-C connected by a line B feeding a load at the receiving end C. The ratings and parame ter values of the components are 500 V/1.5 kV, 9.6 kVA. leakage reactance 5 % 1.2 kV/120 V, 7.2 kVA, leakage reactance 4 % series impedance (0.5 +...
Can you help me solve this problem and show the steps? The local transformer shown below...
Can you help me solve this problem and show the steps?
The local transformer shown below provides the last voltage stepdown in a power distribution system. A common sight on utility poles in residential areas, it is a single-phase transformer that typically has a 13.8-kV rms line to neutral on its primary coil, and a center tap secondary coil provides both 120 V rms and 240 V rms to service several residences. A typical example of this transformer is shown...
5 Three Type B step-voltage regulators are connected in wye and located 7. on the secondary bus of a 12.47kV substation. The feeder is serving an unbalanced load. A power-flow study has been run and the voltages at the substation and the load center node are 7200/0 Vsubabc 7200/-120 V 7200/120 6890.6/-1.49 6990.5/117.05 VLCabel 6825.9/-122.90 v The currents at the substation are 362.8/-27.3 ]-395.4/-154.7 A abc 329.0/98.9 The regulator potential transformer ratio is 7200-120 and the current transformer ratio is...
(30) Assume that a distribution substation, shown below, has a 4000 kVA 69/12.47 kV LTC 4) transformer feeding a three-phase four-wire 12.47 kV distribution system. The transformer has a reactance of 0.065 pu. Assume that fault impedance is 40 Q and that the maximum and minimum power generations of the system are 600 and 360 MVA, respectively. Use 1 MVA as the three-phase power base: a) Under the maximum (system) power generation conditions, determine the available three- phase, L-L, and...
(30) Assume that a distribution substation, shown below, has a 4000 kVA 69/12.47 kV LTC 4) transformer feeding a three-phase four-wire 12.47 kV distribution system. The transformer has a reactance of 0.065 pu. Assume that fault impedance is 40 Q and that the maximum and minimum power generations of the system are 600 and 360 MVA, respectively. Use 1 MVA as the three-phase power base: a) Under the maximum (system) power generation conditions, determine the available three- phase, L-L, and...
draw a single-line diagram for the possible choices
. Two choices of substation transformers with ratings of 12/16/20 MVA and 15/20/25 MVA are available. Transformers have Z1-8 % at their lowest MVA rating. Each transformer is allowed to be overloaded under emergencies by 30-40 % of its maximium rating . The 12.47 kV breakers have interrupting ratings of 12 kA, 16 kA or 20 kA with respective continuous rating of 800, 1200, or 2000 A . The impedance of the...
1. In order to meet an emergency, three single-phase transformers with 12.470/7.200 V are connected in Delta-Wye to form a three-phase transformer which is fed by a 12.470 V transmission line. If the transformer supplies 60 MVA to a load, calculate: (3 marks) a. The turns ratio for each transformer b. The currents in the primary and secondary windings of the transformer c. The primary and secondary transmission line currents 2. A Wye-Delta transformer is connected to a 66 kV...
2. The local transformer shown below provides the last voltage stepdown in a power distribution system. A common sight on utility poles in residential areas, it is a single-phase transformer that typically has a 13.8-LV rms line to neutral on its primary coil, and a center tap secondary coil provides both 120 Vrms and 240 Vrms to service several residences. A typical example of this transformer is shown below. Find the tums ratio necessary to produce the 240-V mms secondary...
d) Consider an ideal, single-phase 2400V-240V transformer. The
primary is connected to a 2200V source and the secondary is
connected to an impedance of 2Ω ∠36.9o , find all the values in
Table 1.
Table 1
No
Parameters
1
The secondary output current and voltage.
2
The primary input current
3
The load impedance as seen from the primary side.
4
The input and output apparent power
5
The output power factor
e) A 30MVA 33/11 kV star-delta three phase...
Q1) Two ideal voltage sources designated as machines 1 and 2 are connected as shown in Figure 1. If E! = 100.200 V, E-100し300 V and Z = 0 +JS a) Determine whether each machine is generating or consuming real power and the amount b) Determine whether each machine is receiving or supplying reactive power and the amount c) Determine the P and Q absorbed by the impedance 2 #2 Figure 1: Ideal voltage sources connected through impedance Z Q2)...
solve no: 3.14 , 3.16, 3.19
please show each step and solve for beginners
120 Power System Analysis 3.12. A single-phase system similar to that shown in Figure 3.11 has two transformers A-B a B-C connected by a line B feeding a load at the receiving end C. The ratings and parame ter values of the components are 500 V/1.5 kV, 9.6 kVA. leakage reactance 5 % 1.2 kV/120 V, 7.2 kVA, leakage reactance 4 % series impedance (0.5 +...
Can you help me solve this problem and show the steps?
The local transformer shown below provides the last voltage stepdown in a power distribution system. A common sight on utility poles in residential areas, it is a single-phase transformer that typically has a 13.8-kV rms line to neutral on its primary coil, and a center tap secondary coil provides both 120 V rms and 240 V rms to service several residences. A typical example of this transformer is shown...
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