rmine the phase current.

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 2.14P: A single-phase source is applied to a two-terminal, passive circuit with equivalent impedance...
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Exercise 6
• If the system in Example 8 has line transmission with impedance 10
+j120, determine the phase current.
for intnenal cimdarion anlye 2021
77
Transcribed Image Text:Exercise 6 • If the system in Example 8 has line transmission with impedance 10 +j120, determine the phase current. for intnenal cimdarion anlye 2021 77
EXAMPLE 8 : balanced A-Y system
A balanced abc-sequence delta-connected source Vine = 210 V. Is connected
to a Y-connected balanced load 40+ j25 O per phase.
1. Calculate the phase currents and use Vah as reference.
2. Draw the phasor diagram
Scanned with CamScanner
Solution
The load impedance is
Z, - 40 + 25 = 47.17/32 1
and the source voltage is
V- 210/0 v
When the A-connected source is transformed to a Y-connected source,
-30 = 121.2/-30° V
The line curTrents are
V 121.2/-30
47.12/32
1, - L/-120 - 257/-178 A
L-L/120 = 257/58 A
257/-62'A
+hich are the same as the plh.e currents
Transcribed Image Text:EXAMPLE 8 : balanced A-Y system A balanced abc-sequence delta-connected source Vine = 210 V. Is connected to a Y-connected balanced load 40+ j25 O per phase. 1. Calculate the phase currents and use Vah as reference. 2. Draw the phasor diagram Scanned with CamScanner Solution The load impedance is Z, - 40 + 25 = 47.17/32 1 and the source voltage is V- 210/0 v When the A-connected source is transformed to a Y-connected source, -30 = 121.2/-30° V The line curTrents are V 121.2/-30 47.12/32 1, - L/-120 - 257/-178 A L-L/120 = 257/58 A 257/-62'A +hich are the same as the plh.e currents
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