The zero-, positive-, and negative-sequence bus impedance

Chapter , Problem 9.38

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The zero-, positive-, and negative-sequence bus impedance matrices for a three-bus three-phase power system are Zbus 0 _ j 2 6 4 0:10 0 0 0 0:20 0 0 00:10 3 7 5 per unit Zbus 1 _ Zbus 2 _ j 2 6 4 0:12 0:08 0:04 0:08 0:12 0:06 0:04 0:06 0:08 3 7 5 Determine the per-unit fault current and per-unit voltage at bus 2 for a bolted threephase fault at bus 1. The prefault voltage is 1.0 per unit.

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