HW2Sol

# HW2Sol - EEL 3216 Introduction to Power Systems Homework 2...

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EEL 3216 Introduction to Power Systems Homework # 2 SOLUTIONS 1. A three phase wye-connected un balanced load is supplied by a balanced three-phase delta connected source. The source voltages and load impedances are: V ab = 13.2 kV ± 90° I an = 19.42 A ± -33.1° V bc = 13.2 kV ± 210° I bn = 16.34 A ± 189.3° V ca = 13.2 kV ± 330° a) Find the impedances Z an , Z bn , and Z cn . b) Calculate the active, reactive, and apparent power delivered by the source. c) Draw the phasor diagram of all voltages and currents I n = 0. ( there is no return path to complete the current loop ) q ± \$ q ± \$ ² q ³ ± \$ ³ ² ³ ² ² 90 25 . 13 ) 3 . 189 34 . 16 1 . 33 42 . 19 ( ) ( c c b a c c b a n I I I I I I I I I q ³ ± : q ± : q ± : q ² q ± q ± q ± q ± q ² ± 90 73 . 573 7 . 50 3 . 466 1 . 153 4 . 392 1 . 33 120 42 . 19 62 . 7 0 62 . 7 240 62 . 7 120 62 . 7 30 3 cn bn an an an cn bn ab an Z Z A KV I V Z KV V KV V KV V V Power delivered: 2 2 2 * * * cn cn bn bn an an cn cn bn bn an an

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## This note was uploaded on 02/01/2012 for the course EEL 3216 taught by Professor Brooks during the Spring '08 term at FSU.

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HW2Sol - EEL 3216 Introduction to Power Systems Homework 2...

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