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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According to the book the answers are
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
What is ampere circuital law?
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.
V6
Electricity Distribution Network - What are the UK power distribution network voltage levels? Why there is the need for a distribution management system in electric power distribution networks? Power System Operation and Control - State three reasons why it is important to maintain the supply frequency within statutory limits for a power system. Power System Operational Issue - Briefly discuss what are the major power quality issues, particularly in power-electronic-interfaced Microgrid systems. New Electricity Demand - Briefly explain the concept of plug-in hybrid electric vehicle technology and its challenges to the power grid. Power System Operational Issue - Briefly explain the concept of Dynamic Network Rating (DNR), and what are the major benefits for electricity distribution networks and distribution network operators (DNOs). Electricity Network Operation with High Penetration Level of Renewables Although wind power is seen as offering many countries the potential to reduce…

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