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EE544 Distribution 1

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EE544 Distribution 1. Distribution Feeder Analysis ... C3 b' 13800 kV. 287 KVA 0.0.87 pf lag. 221 KVA 0.9 pf lag. 732 KVA 0.82 pf lag. 618 KVA 0.874 pf lag ... – PowerPoint PPT presentation

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Title: EE544 Distribution 1


1
EE544 Distribution 1
  • Distribution Feeder Analysis

2
Feeder Analysis
  • Explore modeling and performance of a feeder
    Section with various Assumptions
  • How to look at performance
  • Voltage drop
  • Unbalance
  • Distribution Power Flow
  • Analysis of a complete feeder

3
Feeder Analysis
  • Examples will use following Data

Series impedance
Sequence Matrix assuming transposition ( Not
used in this lecture)
Shunt Capacitive Admittance ( Not used in this
lecture)
4
Feeder Analysis
  • Examples will use following Data

Series impedance
Series impedance
5
Feeder Analysis
287 KVA 0.0.87 pf lag
5
C3 b
1 mi
Sub
C1 5000 C1 5000
2
3
1
C3 a
618 KVA 0.874 pf lag
13800 kV
732 KVA 0.82 pf lag
1 mi
Source impedance j0.005 pu
4
221 KVA 0.9 pf lag
6
Feeder Analysis System Admittance Matrix
YOH12 YS
-YOH12
YOH12 YOH23 Yugb25 Yuga24
-YOH12
-Yuga24
-YOH12
-Yugb25
YOH23
-YOH12
Yuga24
-Yuga24
Yugb25
-Yugb25
7
Feeder Analysis System Admittance Matrix
8
Feeder Analysis System Admittance Matrix
1/
1/
1/
1/
-1
Zs
9
Feeder Analysis
VSa/Zs VSb/Zs VSc/Zs -(S2a/V2a).
-(S2b/V2b) I -(S2c/V2c) -(S3a/V3c).
-(S3b/V3a) -(S3c/V3b).
-(S4a/V4a) -(S4a/V4b).
-(S4c/V4c) -(S5a/V5a).
-(S5b/V5b) -(S5c/V5c)
V Z I
10
Feeder Analysis
VSa/Zs VSb/Zs VSc/Zs -(S2a/V2a).
-(S2b/V2b) I -(S2c/V2c) -(S3a/V3a).
-(S3b/V3b) -(S3c/V3c).
-(S4a/V4a) 0 0 0.
-(S5b/V5b) 0
V Z I
deg
V
11
Feeder Analysis
Current and power in branch 2-3
12
Feeder Analysis
At source
13
Feeder Analysis - Ladder
14
Feeder Analysis - Ladder
15
Feeder Analysis - Ladder
Close enough
16
Feeder Analysis - Ladder
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