A 3 phase 200 MVA capacitor bank is to be switched off (disconnected) the grid that operates at 13.8kV (3-phase) at 60 Hz. The capacitor is connected in a WYE configuration, therefore the voltage across each phase is VL-N = 7.97kV. a. A restrike occurs at the zero crossing of the current. Determine the magnitude of voltage across the capacitor after the restrike. b. 0.05 mSec after the first restrike the arc extinguishes, which leaves a 1st charge trapped. Another restrike occurs again 3/8 of a cycle after the first restrike and is quickly extinguished. Identify the magnitude of voltage trapped across the capacitor after the second restrike.

A 3 phase 200 MVA capacitor bank is to be switched off (disconnected) the grid that operates at 13.8kV (3-phase) at 60 Hz. The capacitor is connected in a WYE configuration, therefore the voltage across each phase is VL-N = 7.97kV. a. A restrike occurs at the zero crossing of the current. Determine the magnitude of voltage across the capacitor after the restrike. b. 0.05 mSec after the first restrike the arc extinguishes, which leaves a 1st charge trapped. Another restrike occurs again 3/8 of a cycle after the first restrike and is quickly extinguished. Identify the magnitude of voltage trapped across the capacitor after the second restrike.

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 2.7P: Let a 100V sinusoidal source be connected to a series combination of a 3 resistor, an 8 inductor,...

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