The 100 k m , 230 k V , 60 H z 100

Question:

The 100km,230kV,60Hz, three-phase line in Problems 4.18 and 4.39 delivers 300MVA at 218kV to the receiving end at full load. Using the nominal π circuit, calculate the ABCD parameters, sending-end voltage, and percent voltage regulation when the receiving-end power factor is

(a) 0.9 lagging,

(b) unity, 

(c) 0.9 leading. Assume a 50C conductor temperature to determine the resistance of this line.

Problem 4.18

A 230kV,60Hz, three-phase completely transposed overhead line has one ACSR 954kcmil conductor per phase and flat horizontal phase spacing, with 7 m between adjacent conductors. Determine the inductance in H/m and the inductive reactance in Ω/km.

Problem 4.39

Calculate the capacitance-to-neutral in F/m and the admittance-to-neutral in S/km for the three-phase line in Problem 4.18. Also calculate the linecharging current in kA/ phase if the line is 110 km in length and is operated at 230kV. Neglect the effect of the earth plane.

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Related Book For  book-img-for-question

Power System Analysis And Design

ISBN: 9781305632134

6th Edition

Authors: J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

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