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4.2
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need help on equation 4.4 only!
4.2 (a) For the system shown in Figure 4.20,...
For the radial distribution system shown in the figure below, the impedances of the two line sect...
For the radial distribution system shown in the figure below,
the impedances of the two line sections and the equivalent
generator are given in pu. Consider symmetrical faults only
(three-phase, positive sequence) and assume that the relay at bus A
is set to pickup for a fault at bus C. The relay at bus B is set to
pickup at one half of that value.
2) Assume there is a DER installed at bus C whose fault current
contribution is...
it is from the book "power system relaying" by Stanley horowitz, 4th edition 2.10 Consider the...
it is from the book "power system relaying" by Stanley horowitz,
4th edition
2.10 Consider the power system shown in Figure 2.27. The nu impedances of the two line sections and the perete ure shown in the figure. Concentrating on three-phase faults only, assume that the relay bus A is set to pick up for hus C Assuming that the pickup setting is equal to the third of the wall current what is the pickup setting of this relay? If...
Consider the system shown in the single-line diagram of Figure 3. All reactances are shown in...
Consider the system shown in the single-line diagram of Figure 3. All reactances are shown in per unit to the same base. Assume that the voltage at both sources is 1 p.u. a- Find the fault current due to a bolted- three-phase short circuit at bus 3. [10 points] b- Find the fault current supplied by each generator and the voltage at each of the buses 1 and 2 under fault conditions. [10 points] 0.1 p.u 0.06 ?.u. 0.25 p.11....
The reactance data for the power system shown in figure 10.30 in per unit on a...
The reactance data for the power system shown in figure 10.30 in
per unit on a common base is as follows:
*************Remember calculations are needed at bus 2
****************
10.15. The reactance data for the power system shown in Figure 10.30 in per unit on a common base is as follows Item X1 G1 0.10 0.10 0.05 G2 0.10 0.10 0.05 T, 0.25 0.25 0.25 T 0.25 0.25 0.25 Line 1-2 0.30 0.30 0.50 Ti 1 3 2 FIGURE 10.30...
The one-line diagram of a simple power system is shown in Figure 1. The neutral of...
The one-line diagram of a simple power system is shown in Figure 1. The neutral of each generator is grounded through a current-limiting reactor of 0.25/3 per unit on a 100-MVA base. The system data expressed in per unit on a common 100-MVA base is tabulated below. The generators are running on no-load at their rated voltage and rated frequency with their emfs in phase. Determine the fault current for the following faults giving Zo = 0.35, Z = 0.22...
Consider the system Shown in the single-line diagram of Figure (3). All reactance are shown in per unit to the same base. Assume that the voltage at both sources is 1 p.u.
Consider the system shown in the single-line diagram of Figure (3). All reactances are shown in per unit to the same base. Assume that the voltage at both sources is \(1 \mathrm{p}\).u.
a- Find the fault current due to a bolted- three-phase short circuit at bus \(3 .[10\) points \(]\)
b- Find the fault current supplied by each generator and the voltage at each of the buses 1 and 2 under fault conditions. \([10\) points \(]\)
Consider the system shown in the single-line diagram of Figure 3. All reactances are shown in...
Consider the system shown in the single-line diagram of Figure 3. All reactances are shown in per unit to the same base. Assume that the voltage at both sources is 1 p.u. c- Find the fault current due to a bolted-three-phase short circuit in the middle of line 1- 3. [5 points d- Find the voltages at buses 1 and 2 under the fault conditions of part c above [5 points] 0.225 pu. 0.035 pu. 0.2p.u ? 0.15 p.u. 0.215...
The one-line diagram of a three-bus power system is shown in Figure 4. All impedances are...
The one-line diagram of a three-bus power system is shown in
Figure 4. All impedances are
expressed in per unit on a common MVA base. All resistances and
shunt capacitances are
neglected. Information on each component in this system is given
below:
• Each generator is represented by an emf
behind the sub-transient reactance of j0.045
and their neutrals are connected to the
ground.
• Line 1-2 has reactance of j0.88
• Line 2-3 has reactance of j0.65
• Line...
+10 V 4.3 Determine the voltage at points Vc V, and VcE in the circuit shown in Figure P4.3 when ...
Please Explain how to do 4.4
+10 V 4.3 Determine the voltage at points Vc V, and VcE in the circuit shown in Figure P4.3 when VBE -0.7V and B- 100. 2kS2 V, 4.4 If the resistance, RB, is made zero in Problem 4.3, what effect does this change have on the circuit operation? 1k2 -10 V Figure P4.3
+10 V 4.3 Determine the voltage at points Vc V, and VcE in the circuit shown in Figure P4.3 when VBE...
A power system network is shown in Figure 1
A power system network is shown in Figure 1. All impedances, except the loads at buses 3 and 4, are expressed in per unit on 100 MVA, 154 kV bases. The loads at buses 3 and 4 are expressed in MW and MVAr. a) Assuming a voltage magnitude of 1.0 per unit at buses 3 and 4, convert the loads to per unit impedances b) Convert network impedances to admittances and obtain the bus admittance matrix
For the radial distribution system shown in the figure below,
the impedances of the two line sections and the equivalent
generator are given in pu. Consider symmetrical faults only
(three-phase, positive sequence) and assume that the relay at bus A
is set to pickup for a fault at bus C. The relay at bus B is set to
pickup at one half of that value.
2) Assume there is a DER installed at bus C whose fault current
contribution is...
it is from the book "power system relaying" by Stanley horowitz,
4th edition
2.10 Consider the power system shown in Figure 2.27. The nu impedances of the two line sections and the perete ure shown in the figure. Concentrating on three-phase faults only, assume that the relay bus A is set to pick up for hus C Assuming that the pickup setting is equal to the third of the wall current what is the pickup setting of this relay? If...
Consider the system shown in the single-line diagram of Figure 3. All reactances are shown in per unit to the same base. Assume that the voltage at both sources is 1 p.u. a- Find the fault current due to a bolted- three-phase short circuit at bus 3. [10 points] b- Find the fault current supplied by each generator and the voltage at each of the buses 1 and 2 under fault conditions. [10 points] 0.1 p.u 0.06 ?.u. 0.25 p.11....
The reactance data for the power system shown in figure 10.30 in
per unit on a common base is as follows:
*************Remember calculations are needed at bus 2
****************
10.15. The reactance data for the power system shown in Figure 10.30 in per unit on a common base is as follows Item X1 G1 0.10 0.10 0.05 G2 0.10 0.10 0.05 T, 0.25 0.25 0.25 T 0.25 0.25 0.25 Line 1-2 0.30 0.30 0.50 Ti 1 3 2 FIGURE 10.30...
The one-line diagram of a simple power system is shown in Figure 1. The neutral of each generator is grounded through a current-limiting reactor of 0.25/3 per unit on a 100-MVA base. The system data expressed in per unit on a common 100-MVA base is tabulated below. The generators are running on no-load at their rated voltage and rated frequency with their emfs in phase. Determine the fault current for the following faults giving Zo = 0.35, Z = 0.22...
Consider the system shown in the single-line diagram of Figure 3. All reactances are shown in per unit to the same base. Assume that the voltage at both sources is 1 p.u. c- Find the fault current due to a bolted-three-phase short circuit in the middle of line 1- 3. [5 points d- Find the voltages at buses 1 and 2 under the fault conditions of part c above [5 points] 0.225 pu. 0.035 pu. 0.2p.u ? 0.15 p.u. 0.215...
The one-line diagram of a three-bus power system is shown in
Figure 4. All impedances are
expressed in per unit on a common MVA base. All resistances and
shunt capacitances are
neglected. Information on each component in this system is given
below:
• Each generator is represented by an emf
behind the sub-transient reactance of j0.045
and their neutrals are connected to the
ground.
• Line 1-2 has reactance of j0.88
• Line 2-3 has reactance of j0.65
• Line...
Please Explain how to do 4.4
+10 V 4.3 Determine the voltage at points Vc V, and VcE in the circuit shown in Figure P4.3 when VBE -0.7V and B- 100. 2kS2 V, 4.4 If the resistance, RB, is made zero in Problem 4.3, what effect does this change have on the circuit operation? 1k2 -10 V Figure P4.3
+10 V 4.3 Determine the voltage at points Vc V, and VcE in the circuit shown in Figure P4.3 when VBE...
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