1. A 800 kV transmission line has per phase con- ductor inductance of 1.0 mH/km and capaci tance of 10.5 nF/km. Find the following: (a) The line surge/characteristic impedance. (b) The ideal power transfer capability of the line. (c) Transient overvoltage generated when the line conductor is struck by lightning and a peak impulse current of 30 kA is injected. 2. A circuit breaker (CB) installed on the line in Q.1 opens when a fault occurs. What will be the peak values of the 'switching overvoltages' produced when: (a) The CB opens at the instant of current zero crossing of the power frequency fault current? (b) The CB interrupts a power frequency fault current at its instant magnitude of 10 kA? 1. (a) 308.6 (b) 2073.88 MW (c) 4.62 MV (peak) 2. (a) 2.26 MV (peak) (b) 4.35 MV (peak)

1. A 800 kV transmission line has per phase con- ductor inductance of 1.0 mH/km and capaci tance of 10.5 nF/km. Find the following: (a) The line surge/characteristic impedance. (b) The ideal power transfer capability of the line. (c) Transient overvoltage generated when the line conductor is struck by lightning and a peak impulse current of 30 kA is injected. 2. A circuit breaker (CB) installed on the line in Q.1 opens when a fault occurs. What will be the peak values of the 'switching overvoltages' produced when: (a) The CB opens at the instant of current zero crossing of the power frequency fault current? (b) The CB interrupts a power frequency fault current at its instant magnitude of 10 kA? 1. (a) 308.6 (b) 2073.88 MW (c) 4.62 MV (peak) 2. (a) 2.26 MV (peak) (b) 4.35 MV (peak)

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 2.13MCQ

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