12. For the single line diagram in Figure below, given base power of 100 MVA. Calculate the following. i. Fault current and power if a fault occurred at point P ii. Fault current and power if a fault occurred at point F G1 11 kv 132 kV T1 Transmission 132 kV Line 25 MVA X-0.15 pu 40 MVA X=0.08 pu 22 kV X= 22 0 Per phase T2 5 MVA X-0.05 pu G2 150 MVA P point F point X-0.03 pu 100 MVA 22 kV X=0.20 pu Load

12. For the single line diagram in Figure below, given base power of 100 MVA. Calculate the following. i. Fault current and power if a fault occurred at point P ii. Fault current and power if a fault occurred at point F G1 11 kv 132 kV T1 Transmission 132 kV Line 25 MVA X-0.15 pu 40 MVA X=0.08 pu 22 kV X= 22 0 Per phase T2 5 MVA X-0.05 pu G2 150 MVA P point F point X-0.03 pu 100 MVA 22 kV X=0.20 pu Load

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter7: Symmetrical Faults

Section: Chapter Questions

Problem 7.26P

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Similar questions

Describe the concept of fault current analysis in power systems and its role in protecting electrical equipment.
Contribution of fault analysis in power system netwrok?
The following figure shows the single-line diagram of a three-bus power system. Additionally, a second line with an admittance of -j20 pu is connected between the bus 2 and 3. Now, a three-phase fault occurs at bus 3. Determine the fault current and post-fault voltages of all buses in pu. Assume the pre-fault bus voltages to be 1.0 pu.
Explain the concept of fault analysis in power systems. What are the different types of faults, and how are they analyzed and mitigated?
Describe the process of fault current analysis in power systems and its significance in protecting electrical equipment from damage.
Thévenin equivalent sequence networks looking into the faulted bus of a power system are given with ?1=?0.15 , ?2=?0.15 , ?0=?0.2and ?1=1∠0°per unit. Compute the fault currents and voltages for the followingfaults occurring at the faulted bus: (a) Balanced three-phase fault (b) Single line-to-ground fault (c) Line-line fault (d) Double line-to-ground fault Which is the worst fault from the viewpoint of the fault current?
Explain the significance of fault current analysis in power system protection.
i) An equation for the fault current when a single-line-to-ground fault occurs ii) derive an equation for voltage under a single-line-to- ground fault condition.
Explain the concept of electrical grid reliability and its importance.
The single line diagram of a power system is shown in Figure Q2.1 including generator and transformer winding connection and earthing details. The parameters for this system have been calculated on a common 100 MVA base and are given in Table Q2.1. All resistances and shunt susceptances are neglected. This system experiences a single line to ground fault at a point F on line L1. The point F is at a distance d from Bus 4 along the line L1. The total length ?? of the line L1 is 50 km. Note that the location of ?? is not drawn to scale in Figure Q2.1. The fault current at the fault point F is measured to be 6.106 kA. i) Determine the zero, positive, and negative sequence Thevenin equivalent impedances as seen at the fault point F. These should be evaluated in per unit and shown as a function of d.ii) Use the sequence impedances calculated in part (i) to determine the distance d of the fault (in km) from Bus 4.
Explain the concept of fault analysis in power systems and how it helps in ensuring system reliability.
Consider the oneline diagram of a simple power system shown in Figure 9.20. System data in per-unit on a 100-MVA base are given as follows: The neutral of each generator is grounded through a current-limiting reactor of 0.08333 per unit on a 100-MVA base. All transformer neutrals are solidly grounded. The generators are operating no-load at their rated voltages and rated frequency with their ENIFs in phase. Determine the fault current for a balanced three-phase fault at bus 3 through a fault impedance ZF=0.1 per unit on a 100-MVA base. Neglect -Y phase shifts.