Power System Analysis and Design (MindTap Course List)
6th Edition
ISBN: 9781305632134
Author: J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Publisher: Cengage Learning
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Chapter 2, Problem 2.26P
A small manufacturing plant is located 2 km down a transmission line, which has a series reactance of
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transmission lines with the specification given in table 1. The conductors are
placed with a flat horizontal spacing of 7.25 meters. Consider that the load
connected against the line 125MW at 0.85 lagging power factor.
You are required to develop an equivalent model for a maximum 220V (RMS)
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Chapter 2 Solutions
Power System Analysis and Design (MindTap Course List)
Ch. 2 - The rms value of v(t)=Vmaxcos(t+) is given by a....Ch. 2 - If the rms phasor of a voltage is given by V=12060...Ch. 2 - If a phasor representation of a current is given...Ch. 2 - Prob. 2.4MCQCh. 2 - Prob. 2.5MCQCh. 2 - Prob. 2.6MCQCh. 2 - Prob. 2.7MCQCh. 2 - Prob. 2.8MCQCh. 2 - Prob. 2.9MCQCh. 2 - The average value of a double-frequency sinusoid,...
Ch. 2 - The power factor for an inductive circuit (R-L...Ch. 2 - The power factor for a capacitive circuit (R-C...Ch. 2 - Prob. 2.13MCQCh. 2 - The instantaneous power absorbed by the load in a...Ch. 2 - Prob. 2.15MCQCh. 2 - With generator conyention, where the current...Ch. 2 - Consider the load convention that is used for the...Ch. 2 - Prob. 2.18MCQCh. 2 - The admittance of the impedance j12 is given by...Ch. 2 - Consider Figure 2.9 of the text, Let the nodal...Ch. 2 - The three-phase source line-to-neutral voltages...Ch. 2 - In a balanced three-phase Y-connected system with...Ch. 2 - In a balanced system, the phasor sum of the...Ch. 2 - Consider a three-phase Y-connected source feeding...Ch. 2 - For a balanced- load supplied by a balanced...Ch. 2 - A balanced -load can be converted to an...Ch. 2 - When working with balanced three-phase circuits,...Ch. 2 - The total instantaneous power delivered by a...Ch. 2 - The total instantaneous power absorbed by a...Ch. 2 - Under balanced operating conditions, consider the...Ch. 2 - One advantage of balanced three-phase systems over...Ch. 2 - While the instantaneous electric power delivered...Ch. 2 - Given the complex numbers A1=630 and A2=4+j5, (a)...Ch. 2 - Convert the following instantaneous currents to...Ch. 2 - The instantaneous voltage across a circuit element...Ch. 2 - For the single-phase circuit shown in Figure...Ch. 2 - A 60Hz, single-phase source with V=27730 volts is...Ch. 2 - (a) Transform v(t)=75cos(377t15) to phasor form....Ch. 2 - Let a 100V sinusoidal source be connected to a...Ch. 2 - Consider the circuit shown in Figure 2.23 in time...Ch. 2 - For the circuit shown in Figure 2.24, compute the...Ch. 2 - For the circuit element of Problem 2.3, calculate...Ch. 2 - Prob. 2.11PCh. 2 - The voltage v(t)=359.3cos(t)volts is applied to a...Ch. 2 - Prob. 2.13PCh. 2 - A single-phase source is applied to a...Ch. 2 - Let a voltage source v(t)=4cos(t+60) be connected...Ch. 2 - A single-phase, 120V(rms),60Hz source supplies...Ch. 2 - Consider a load impedance of Z=jwL connected to a...Ch. 2 - Let a series RLC network be connected to a source...Ch. 2 - Consider a single-phase load with an applied...Ch. 2 - A circuit consists of two impedances, Z1=2030 and...Ch. 2 - An industrial plant consisting primarily of...Ch. 2 - The real power delivered by a source to two...Ch. 2 - A single-phase source has a terminal voltage...Ch. 2 - A source supplies power to the following three...Ch. 2 - Consider the series RLC circuit of Problem 2.7 and...Ch. 2 - A small manufacturing plant is located 2 km down a...Ch. 2 - An industrial load consisting of a bank of...Ch. 2 - Three loads are connected in parallel across a...Ch. 2 - Prob. 2.29PCh. 2 - Figure 2.26 shows three loads connected in...Ch. 2 - Consider two interconnected voltage sources...Ch. 2 - Prob. 2.35PCh. 2 - Prob. 2.36PCh. 2 - Prob. 2.37PCh. 2 - Prob. 2.38PCh. 2 - Prob. 2.39PCh. 2 - A balanced three-phase 240-V source supplies a...Ch. 2 - Prob. 2.41PCh. 2 - A balanced -connected impedance load with (12+j9)...Ch. 2 - A three-phase line, which has an impedance of...Ch. 2 - Two balanced three-phase loads that are connected...Ch. 2 - Two balanced Y-connected loads, one drawing 10 kW...Ch. 2 - Three identical impedances Z=3030 are connected in...Ch. 2 - Two three-phase generators supply a three-phase...Ch. 2 - Prob. 2.48PCh. 2 - Figure 2.33 gives the general -Y transformation....Ch. 2 - Consider the balanced three-phase system shown in...Ch. 2 - A three-phase line with an impedance of...Ch. 2 - A balanced three-phase load is connected to a...Ch. 2 - What is a microgrid?Ch. 2 - What are the benefits of microgrids?Ch. 2 - Prob. CCSQCh. 2 - Prob. DCSQ
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- The load flow data for the sample power system are given below. The voltage magnitude at bus 2 is to be maintained at 1.04 p.u.Determine the set of load flow equations at the end of first iteration by using N-R method. Impedance for sample system Bus Code Impedances line charging admittance 1-2 0.08 + j0.24 0.0 1-3 0.02 + j0.06 0.0 2-3 0.06 + j0.18 0.0 Schedule of generation and loads: Bus Code Assured Voltages Generation Load…arrow_forwardThe figure shows a 500-kV (line-to-line voltage) transmission line linking two systems. The theoretical maximum power that can be transferred from System A to System B is 5,000 MW, which occurs when the power angle 8 = 90°. The line current is then proportional to (VA - VB) The reactive power losses (Mvar) in the transmission line during this transfer would be most nearly: Wond O A. 1,667 O B.. 3,333 O C. 5,000 O D. 10,000 Know EQUIVALENT SYSTEM A VA= 500 28 KV m XL = 50 Ω EQUIVALENT SYSTEM B VB = 500 40⁰ kV Oarrow_forwardParagraph Styles The power factor must be close to in the transmission lines will be reduced To insure that losses D(Ctrl) -arrow_forward
- 1) A 60-Hz, ...-km, three-phase overhead transmission line has a series impedance z = 0.8431L79.04 ohm/km and a shunt admittance y = 5.105 × 106 L90 S/km. The load at the receiving end is 125 MW at unity power factor and at 215 KVLL. Determine the voltage, current, real and reactive power at the sending end and the percent voltage regulation of the line for nominal pi network. (Please determine the length of the transmission line within the specified limits: 150-220 km. By considering the length value you determined yourself, solve the question.)arrow_forwardComplete the sentence The power factor must be close to ……………. To insure that losses in the transmission lines will be reducedarrow_forwardN-Rarrow_forward
- A surge of 100 kV travels along an overhead line towards its junction with a cable. The surge impedance for the overhead line and cable are 400 ohms and 50 ohms respectively. The magnitude of the surge transmitted through the cable is ?arrow_forwardThe steady-state voltage drop between the load and the sending end of the line seen in (Figure 1) is excessive Suppose that V-4950/0° V (rms). A capacitor is placed in parallel with the 192 kVA load and is adjusted until the steady-state voltage at the sending end of the line has the same magnitude as the voltage at the load end, that is, 4950 V (rms). The 192 kVA load is operating at a power factor of 0.8 lag. Part A Calculate the size of the capacitor in microfarads if the circuit is operating at 60 Hz. In selecting the capacitance, use the value that results in the lowest possible power loss in the line. Express your answer in microfarads to three significant figures. ▸ View Available Hint(s) Figure 1 of 1 202 1100 192 kVA 0.8 lag ΜΕ ΑΣΦ. 11 vec C= 22.8 Submit Previous Answers Incorrect; Try Again; 5 attempts remaining Provide Feedback ? Farrow_forwardHigh voltage engineering subjectarrow_forward
- Tam responsible for any violations with regard to this. A load of 135 MW at a power factor of 0.65 lagging can be delivered by a 3-phase transmission line. The voltage at the receiving end is to be maintained at 54 kV and the loss in the of transmission is 6 % of the power delivered. (Consider the line to be a short transmission line) Find ion Single phase Power delivered Per phase voltage snt fleiarrow_forwardCalculate the capacitance of a single phase 50 Hz overhead line 40 km long consisting of two parallel wires each 5 mm in diameter, 1.5 metres apart, taking the effect of ground into consideration. The height of the conductors above ground is 7 metres. Derive any formula used. [A.P.S. Univ. Electric Power Generation, Transmission and Distribution 1978) [Ans. 0.174 pF] Aarrow_forwardA 220 kV, three phase transmission line is 50 km long. The resistance per phase is r 2 per km and the inductance per phase is L mH per km. The shunt capacitance is negligible. If the line supplies a three-phase load of 229 MVA at 0.8 power factor lagging at 220 kV with an efficiency of 97.13% and a voltage regulation of 4.7581%. Use the short line model to find the line resistance and inductance of the line.arrow_forward
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