HOME WORK For the simple distribution system shown in Figure below, use the probabilistic approach to find: a)the feeder reliability, by assuming that the reliabilities of the individual components are: Ral = Ra2- Ra3-Rel -Rc2 Rc3-Ra and Rbl -Rb2 Rb3 Rb. b) Calculate the unreliability of the feeder if Ra Rb 0.9900. %3D %3D %3D B/BI B/B 2 A1 A2

HOME WORK For the simple distribution system shown in Figure below, use the probabilistic approach to find: a)the feeder reliability, by assuming that the reliabilities of the individual components are: Ral = Ra2- Ra3-Rel -Rc2 Rc3-Ra and Rbl -Rb2 Rb3 Rb. b) Calculate the unreliability of the feeder if Ra Rb 0.9900. %3D %3D %3D B/BI B/B 2 A1 A2

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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Question 3. A three-phase impedance load balanced D a connected load in parallel with a balanced ? connected load made of bonding. D each arm for the load ?D = 6 + 6? and ? each arm for the connected load It is given as ?? = 2 + 2?. ? the connected load ?? = 1? is earthed through the neutral impedance. To this impedance load, the symmetrical component voltages ?0 = 10∠60°, ?1 = 100∠0° and ?2 = Unbalanced phase-to-earth voltages ??, ?? and ?? of 15∠200° volts were applied. a) Draw the zero, positive and negative sequence circuits. b) Find the complex powers imparted to each component circuit.
Electrical Engineering A 240V single phase circuit is run in conduit in 2 core 70°C PVC/PVC cable having live a) conductor of 2.5 mm (leperating is approximately 20A) and protection conductor cable (cpc) of 1.5 mm If the circuit is protected by 30 HRC fuse, with circuit length of 55 m, and Zg is 0.8 0 EVALUATE whether the initial cip.c. size provided is adequate. Given 2 core PVC/PVC bunched cable impedance is (R +R2) 26.9 m2/m and k -115.
The figure below shows the one-line diagram of a four- bus power system. The voltages, the scheduled real power and reactive powers, and the reactances of transmission lines are marked at this one line diagram (The voltages and reactances are in PU referred to 100 MW base. The active power P2 in MW is the last three digits (from right) of your registration number (i.e for the student that has a registration number 202112396, P2 =396). [10] Starting from an estimated voltage at bus 2, bus 3, and bus 4 equals V2 (0) = 1.15<0°, V3 = 1.15 < 0°, V4 1.1< 0°. 1- Specify the type of each bus and known & unknown quantities at each bus. 2- Find the elements of the second row of the admittance matrix (i.e. [Y21 Y22 Y23 Y24]). 3- Using Gauss-Siedal fınd the voltage at bus 2 after the first iteration. 4- Using Newton-Raphson, calculate: |- The value of real power (P2), at bus 2 after the first iteration. Il- The second element in the first row of the Jacobian matrix after the first iteration. 2 P2…
Do the following: Solve for the voltage across the appliance and the current through it by referring the appliance to the transformer primary. (Assign the convenience outlet voltage as the reference phasor i.e. at 0o) Draw the circuit that would solve for VL and IL. Compute all referred values and label all components. Solve for VL and IL
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A network consisting of a set of generator and load buses is to be modeled with a DC power flow, for the sake of conducting a contingency analysis. The initial flows calculated with the DC power flow give the following information: f°2-4 = - 65.3 MW and fº4-5 = 13.6 MW. The following values of LODF and PTDF factors are given: PTDF54,2-4 = -0.2609, LODF2-4,4-5 = -0.6087. Calculate the contingency flow on line 2-4 due to outage of line 4-5. Select one: O a. -75.5MW O b. None of these O c. -68.85MW O d. -73.58MW O e. 75.5MW O f. -61.75MW
Choose the right answer. 1. The symmetrical component method is …………. 2. Conditions for succesful operation of a power system ………،……….. and ………… 3. The reason we use the numerical methods in load flow analysis is ……….
For the system shown in figure, voltages V2, V3 and angles 82, 83 are calculated using Newton-Raphson method. shunt line charging admittances are neglected. All the values are given in per unit on 100MVA base. Calculate the complex power flows S12 and S32 in actual units. 1) Z12 = 0.01+ j0.02 Z3 = 0.02+ j0.04 PL G QL Slack bus V2 = 0.96L -1.67° V3 = 0.884 - 5.48° Vi=1.0/0° (estimated time to answer this question: 13 minutes)
HOME WORK For the simple distribution system shown in Figure below, use the probabilistic approach to find: a)the feeder reliability, by assuming that the reliabilities of the individual components are: Ral = Ra2 = Ra3 = Rcl =Rc2 Rc3= Ra and Rbl = Rb2 = Rb3 = Rb. b) Calculate the unreliability of the feeder if Ra = Rb = 0.9900. B/BI B/B2 AI A2 B2 CI C2 Circuit breaker Isolator A3 B3 C3 Feeder F Eng. Tamador Almomani 114 Eng. Tamador Almomani
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14/ Coupling Capacitors are used to prevent High Frequency Low Power Communication Signals leaking into the Power System Transformers. Select one: True False
Electrical Engineering a) A 240V single phase circuit is run in conduit in 2 core 70°C PVC/PVC cable having live conductor of 2.5 mm? (Ioperating is approximately 20A) and protection conductor cable (cpc) of 1.5 mm?. If the circuit is protected by 30 HRC fuse, with circuit length of 55 m, and ZE is 0.8 2. EVALUATE whether the initial c.p.c. size provided is adequate. Given 2 core PVC/PVC bunched cable impedance is (R1 + R2) = 26.9 m2/m and k = 115.