Chapter 5: Q3CSQ (page 306)
Which HVDC technology can independently control both active (real) power flow and reactive power flow to and from the interconnected ac system?
Therefore, Voltage source convertor based HVDC can independently control both active and reactive power.
Over 30 million students worldwide already upgrade their learning with Vaia!
All the tools & learning materials you need for study success - in one app.
Get started for free
Rated line voltage is applied to the sending end of the line in Problem 5.26. Calculate the receiving-end voltage when the receiving end is terminated by (a) an open circuit, (b) the surge impedance of the line, and (c) one-half of the surge impedance. (d) Also calculate the theoretical maximum real power that the line can deliver when rated voltage is applied to both ends of the line.
Question: The velocity of propagation of voltage and current waves along a lossless overhead line is the same as speed of light.
(a) True
(b) False
The power flow at any point on a transmission line can be calculated in terms of the ABCDparameters. By lettingand , the complex power at the receiving end can be shown to be
(a) Draw a phasor diagram corresponding to the above equation. Let it be represented by a triangle OโOA with Oโ as the origin and OA representing .
(b) By shifting the origin from Oโ to O, turn the result of part (a) into a power diagram, redrawing the phasor diagram. For a given fixed value of and a set of values for , draw the loci of point A , thereby showing the so-called receiving-end circles.
(c) From the result of part (b) for a given load with a lagging power factor angle , determine the amount of reactive power that must be supplied to the receiving end to maintain a constant receiving-end voltage if the sending-end voltage magnitude decreases from to .
The equivalent circuit is identical in structure to the nominalcircuit.
(a) True
(b) False
A , , ,three-phase uncompensated line has a positive sequence series reactance and a positive-sequence shunt admittance . Neglecting losses, calculate: (a) , (b), (c) the parameters, (d) the wavelength of the line in kilometres, and (e) the surge impedance loading in MW
What do you think about this solution?
We value your feedback to improve our textbook solutions.
