A three phase, four-bus system is shown at figure 1. The transmission line per unit impedances are as follows: LINE Rating (MVA) VOLTAGE (KV) IMPEDANCE (pu) 1-2 100 110 0.08+j0.4 1-3 100 110 0.08+j0.4 2-3 100 110 0.03+j0.3 2-4 100 110 0.01+j0.1 3-4 100 110 0.01+j0.1 The load takes 10MVA at 0.8 power factor lagging at 100kV. If the pre fault voltage at bus 4 is 100kV, determine (a) the fault current supplied by the generator G2 in Amperes; (b) symmetrical fault at bus 4 in Amperes; (c) Short circuit MVA at bus 4. G2 8MVA 110kV 3%R 10%X 5MVA 110kV G1 5%R 15%X BUS1 BUS3 BUS2 G3 10MVA 110kV 3%R 20%X BUS4 LOAD 10MVA @100KV 0.8 power factor lagging

A three phase, four-bus system is shown at figure 1. The transmission line per unit impedances are as follows: LINE Rating (MVA) VOLTAGE (KV) IMPEDANCE (pu) 1-2 100 110 0.08+j0.4 1-3 100 110 0.08+j0.4 2-3 100 110 0.03+j0.3 2-4 100 110 0.01+j0.1 3-4 100 110 0.01+j0.1 The load takes 10MVA at 0.8 power factor lagging at 100kV. If the pre fault voltage at bus 4 is 100kV, determine (a) the fault current supplied by the generator G2 in Amperes; (b) symmetrical fault at bus 4 in Amperes; (c) Short circuit MVA at bus 4. G2 8MVA 110kV 3%R 10%X 5MVA 110kV G1 5%R 15%X BUS1 BUS3 BUS2 G3 10MVA 110kV 3%R 20%X BUS4 LOAD 10MVA @100KV 0.8 power factor lagging

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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