Transmission Power Lines Tutorials Tutorial n° 0: Construction of transmission power lines A Young Electrical Engineer proposes to build an electrical network with a starting voltage of 110 kV to supply a city with a power of 15 MW. He finds that his power line changes direction 8 times in its journey. The distance between the first support and the 1st change of direction is 3.5 km. Between the 2nd and the 3rd change of direction the distance is 5 km, while between the 6th and the 7th it is 4 km. The distances between the other changes of direction are 3 km. At the 4th change of direction, the line finds a branch to supply a 1.5 MVA load at station B located 6 km away. The distance between the last support and the last change of direction is 3.5 km. This line crosses a busy road three times. The distance between two supports is 250 m and the distance between tw consecutive electrical crossing supports is 150m. The definition and the diagram of the layout, canton, range, arrow of the line -

Transmission Power Lines Tutorials Tutorial n° 0: Construction of transmission power lines A Young Electrical Engineer proposes to build an electrical network with a starting voltage of 110 kV to supply a city with a power of 15 MW. He finds that his power line changes direction 8 times in its journey. The distance between the first support and the 1st change of direction is 3.5 km. Between the 2nd and the 3rd change of direction the distance is 5 km, while between the 6th and the 7th it is 4 km. The distances between the other changes of direction are 3 km. At the 4th change of direction, the line finds a branch to supply a 1.5 MVA load at station B located 6 km away. The distance between the last support and the last change of direction is 3.5 km. This line crosses a busy road three times. The distance between two supports is 250 m and the distance between tw consecutive electrical crossing supports is 150m. The definition and the diagram of the layout, canton, range, arrow of the line -

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

Chapter2: Fundamentals

Section: Chapter Questions

Problem 2.16P: A single-phase, 120V(rms),60Hz source supplies power to a series R-L circuit consisting of R=10 and...

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Let a series RLC network be connected to a source voltage V, drawing a current I. (a) In terms of the load impedance Z=ZZ, find expressions for P and Q, from complex power considerations. (b) Express p(t) in terms of P and Q, by choosing i(t)=2Icost. (c) For the case of Z=R+jL+1/jC, interpret the result of part (b) in terms of P,QL, and Qc. In particular, if 2LC=1, when the inductive and capacitive reactances cancel, comment on what happens.
A single-phase, 120V(rms),60Hz source supplies power to a series R-L circuit consisting of R=10 and L=40mH. (a) Determine the power factor of the circuit and state whether it is lagging or leading. (b) Determine the real and reactive power absorbed by the load. (c) Calculate the peak magnetic energy Wint stored in the inductor by using the expression Wint=L(Irms)2 and check whether the reactive power Q=Wint is satisfied. (Note: The instantaneous magnetic energy storage fluctuates between zero and the peak energy. This energy must be sent twice each cycle to the load from the source by means of reactive power flows.)
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1.1 We have two loads in delta and another in star in parallel, the impedances of the branches of the delta are equal and we have that RΔ=1p.u. and XΔ=0.75 p.u., while in the star we have equal values of the branches, but formed by admittances where we have the conductance in parallel GY=0.64 p.u. and inductive susceptance of BY=-j0.48 p.u. If the loads are being supplied by a positive sequence balanced three-phase source with line-to-line voltage of phases a and b of Vab=1∠ 30º, if the base values are line-to-line base voltage of 1kV and three-phase base power of 100kW. DetermineA) Line and phase voltages, line and phase currents of the load in delta, line and phase voltages of the star, line and phase currents of the star.B) Obtain separately the phasor diagram of the delta and star load with the values obtained in A), indicate on the scale that these are 1 p.u.=5cm for example.C) obtain the power triangle and the power factor separately for each load. D) Obtain the power…