Power System Analysis and Design (MindTap Course List)
6th Edition
ISBN: 9781305632134
Author: J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Publisher: Cengage Learning
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 9, Problem 9.34P
At the general three-phase bus shown in Figure 9.7(a) of the text, consider a simultaneous single line-to-ground fault on phase a and line-to-line fault between phases b and c, with no fault impedances. Obtain the sequence-network interconnection satisfying the current and voltage constraints.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
I need the answer as soon as possible
sequence networks are to be connected
fault terminals through the impedance
components of the fault current are
at the
the sequence
Fill in the blanks.
For a line-to-line fault with a fault impedance ZF, the positive and
negative sequence networks are to be connected
at the fault terminals through the impedance
; the positive and negative sequence components of the fault
current are
and the
zero-sequence current is
Fill in the blanks.
For a double-line-to-ground fault with a fault impedance ZF, the
sequence networks are to be connected
fault terminals; additionally,
with the zero-sequence network. Fill in the blanks.
at the
is to be included in series
Quiq plz
Chapter 9 Solutions
Power System Analysis and Design (MindTap Course List)
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, electrical-engineering and related others by exploring similar questions and additional content below.Similar questions
- For the system of Problem 9.13, compute the fault current for the following faults at bus 3: (a) a single line-to-ground fault through a fault impedance ZF=j0.1 per unit, (b) a line-to-line fault through a fault impedance ZF=j0.1 per unit, (c) a double line-to-ground fault through a common fault impedance to ground ZF=j0.1 per unit.arrow_forwardConsider 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 b- Find the fault current supplied by each generator and the voltage at each of the buses 1 and 2 under fault conditions 0.06 p.u. 0.2 p.u. 0.04 p.u. 0.25 p.u. 0.2 p.u. 0.2 p.. 0.2 p.u. 0.06 p.u. 0.25 p.u. Figure (3) Single-line diagram ele ver ele 888 ele 0.06 p.u. 0.25 p.u.arrow_forwardb) A fault occurs at bus 4 of the network shown in Figure Q3. Pre-fault nodal voltages throughout the network are of 1 + j0 p.u, and the impedance of the electric arc is neglected (Zf = 0 + j0 p.u.). The positive, negative and zero sequence impedance parameters of the generator, transmission lines and transformer are given in Figure Q3. (i) Determine the positive sequence fault current for the case when a three-phase-to-ground fault occurs at bus 4 of the network (ii) Determine the short-circuit fault current for the case when a one-phase- to-ground fault occurs at bus 4. Recall that phasors can be expressed in terms of their symmetrical components as shown in the picture attached. where F stands for any three-phase quantity (e.g., current, voltage) (iii) Determine the short-circuit fault current for the case when a phase-to-phase fault occurs at bus 4 ReplyForwardarrow_forward
- Please solve Q1(B) ONLY. Q1(A) is for reference.arrow_forwardSolve it fast fast plzarrow_forward3.On a double line-to-ground faultImmersive reader A) The short-circuit currents in the faulted phases are equal. B) The voltages at the fault point on the faulted phases are zero. C) The phase not involved in the fault has a zero voltage at the fault point. D) There are no circulating currents through the neutrals to ground. E) N. A.arrow_forward
- Figure shows a sample power system network and Zpus Matrix elements. For a solid three phase fault take place at bus 3. Determine a) Fault current (b) V1 , V21 and Var (c) Post fault current in lines 1-2 and 1-3. The line from bus 1-2 impedance =j1.2p.u The line from bus 2-3 impedance =j0.16p.u The line from bus 3-1 impedance =j1.37p.u The Zbus matrix element values are Zbus Matrix Z13 = 0.4; Zbus Matrix Z23 =1.01; Zbus Matrix Z33 =1.55; Fault Post fault voltage at bus 1 (V1) in p.u Post fault voltage at bus 2 (V21 ) in p.u Post fault voltage at bus 3 (V31 ) in p.u Post fault current( I12) in line between 1-2 in p.u Post fault current (I13) in line between 1-3 in p.uarrow_forwardQ2/The positive-sequence reactances for the power system shown in Figure are in per unit on a common MVA base. Resistances are neglected and the negative-sequence impedances are assumed to be the same as the positive-sequence impedances. A bolted line-to-line fault occurs between phases b and c at bus 2. Before the fault occurrence, all bus voltages are 1.0 per unit. Obtain the positive sequence bus impedance matrix. Find the fault current, the three-phase bus voltages during fault, and the line currents in each phase. T₁ 1 0.15 उह 3 X=j0.05 G₁ j0.6 j0.3 2 T2 j0.05 X=j0.05 G₂arrow_forwardProblem 5 Thevenin equivalent sequence networks looking into the faulted bus of a power system are given with Z1 = j0.15, Z2 = j0.15, ZO = j0.2, and El =1L0 per unit. Compute the fault currents and voltages for the following faults 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?arrow_forward
- Problem 5: Thevenin equivalent sequence networks looking into the faulted bus of a power system are given with Z1 = j0.15, Z2 = j0.15, Z0 = j0.2, and El = 1L 0° per unit. Compute the fault currents and voltages for the following bolted faults 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?arrow_forwardThe 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.arrow_forwardQ.3 When a line-to-ground fault occurs, the current in faulted phase 'a' is 100A. The zero-sequence current in phase 'c' isarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Power System Analysis and Design (MindTap Course ...Electrical EngineeringISBN:9781305632134Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. SarmaPublisher:Cengage Learning
Power System Analysis and Design (MindTap Course ...
Electrical Engineering
ISBN:9781305632134
Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Publisher:Cengage Learning
Fault Analysis in Power Systems part 1a; Author: GeneralPAC: Power System Tutorials;https://www.youtube.com/watch?v=g8itg4MOjok;License: Standard youtube license