Need a solu 12.4 A PBX with 200 stations has five trunks to the public network. What is theblocking probability if each station is involved in three external calls per 8-hrworking day with an average duration of 2 min per call? Assume the averagecalling rate is constant during the day (no busy hour) and blocked calls returnwith random retries. What is the offered load? What is the demand traffic?

Step 1: Step 2: Step 3: Step 4:

Answered: 12.4 A PBX with 200 stations has five…

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

Chapter5: Transmission Lines: Steady-state Operation

Section: Chapter Questions

Problem 5.14MCQ

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Question 11 Construct the Z bus by using the algorithms for below network by following the bus order of 0-1-2-3. j0. 1 ll j0.05 jo-5 j1.25 Reference None of the given [j0.565 j0.358 j0.358 j0.358 j0.425 j0.425 j0.358 j0.425 j0.425] [j0.465 j0.368 j0.368 j0.368 j0.415 j0.415 j0.368 j0.415 j0.435 ] [j0.365 j0.338 j0.338 j0.338 j0.405 j0.405 j0.338 j0.405 j0.455 ]
G. In AC OPF the locational marginal price (LMP) for different buses could be different due to (a) system loss (c) both (a) and (b) (b) binding line flow constraint (d) neither (a) nor (b) H. In DC OPF, the Lagrange multiplier of a line flow constraint (line lambda) is positive when the line flow is (a) not at any limit (b) at upper limit (c) at lower limit I. Assume the number of measurements is Nm and the number of state variables is Ng. In state estimation we usually have: (а) Nm — N, (b) Nm > N, (c) Nm < Ng (d) none above
Following figure shows the one-line diagram of a two bus system. Take bus 1 as slack bus, bus 2 as load (PQ) bus. Neglect the shunt charging admittance. Obtain the bus admittance matrixYBUs and find V₂ and 62, power flows and line losses using FDLF method. All the values are given in per unit on 100MVA base. Use a tolerance of 0.001 for power mismatch. 1 Z12= 0.12+10.16 Slack bus V₁ 1.0/0⁰ pu 2 PL2=1.0pu Q12=0.5pu
Solve numerical : Following figure shows the one-line diagram of a two bus system. Take bus 1 as slack bus, bus 2 as load (PQ) bus. Neglect the shunt charging admittance. Obtain the bus admittance matrixYBUS and find V2 and δ2, power flows and line losses by using Fast decoupled power flow method. All the values are given in per unit on 100MVA base. Use a tolerance of 0.001 for power mismatch.
400Ω A k=0.9 600Ω B k=0.8 66Ω 600Ω
1. FIGURE 52 shows the one-line diagram of a simple three-bus power system with generation at bus I. The voltage at bus l is V1 = 1.0L0° per unit. The scheduled loads on buses 2 and 3 are marked on the diagram. Line impedances are marked in per unit on a 100 MVA base. For the purpose of hand calculations, line resistances and line charging susceptances are neglected a) Using Gauss-Seidel method and initial estimates of Va 0)-1.0+)0 and V o)- ( 1.0 +j0, determine V2 and V3. Perform two iterations (b) If after several iterations the bus voltages converge to V20.90-j0.10 pu 0.95-70.05 pu determine the line flows and line losses and the slack bus real and reactive power. 2 400 MW 320 Mvar Slack 0.0125 0.05 300 MW 270 Mvar FIGURE 52
Question 5. (a) Explain the expected stylization of the autocorrelation functions for the following stochastic processes: • white noise AR(2) and MA(1) • ARMA(2,1). AFTER ARMA
I need an expert. I previously sent a request, and the expert divided the time periods equally for both areas A and B. I did not understand how and why this was done. Please explain to me with a diagram why we do this. A generation station of 3 MW supply a two regions A & B .The line losses are neglected and the load variation of these regions is as follow: Region A (Time) 11 a.m From midnight to From 5 am to From 8 a.m to From 11 a.m to Load (kw) Region B (Time) 5 a.m No-load 8 a.m 1200 800 6 p.m No-load From From From midnight to 6 a.m to 3 p.m to 7 p.m to 6 a.m 3 p.m 7 p.m Load (kw) 400 900 No-load 9 p.m 1800 From From 6 p.m to midnight 600 From 9 p.m to midnight 200 1-Plot The daily load curve of the total system.
A 120VAC_RMS, 60Hz line is connected to a Triac which produces a RMS output of 89.431 volts. Determine the firing times (milliseconds). The first time corresponds to an angle between zero and 180 degrees. the second time between 180 degrees and 360 degrees. Also determine the corresponding firing angles (degrees). This is the function of a modern dimmer switch. Hint: calculation can be simplified by considering only the first half of the sine wave. ans:4
Analyse several voltage and current situations in different loading scenarios in a simplified radial (transformer to consumption) medium-voltage power system example. There are only 2 nodes in the 35 kV line – node 0 from the 110/35 kV and node 1 with one consumer. Briefly reflect on the complexity of the calculations for known input or output voltage, as well as for fixed or voltage-dependent consumption in this simple power system model. Analyse and discuss the sensitivity of the voltage drop [in % of amplitude and the degrees of phase] with respect to the current level [in %] and to the power factor.
How do circuit breakers improve the resilience of service interactions in distributed systems?
V6

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