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Traveling Wave Visualization in
Multi-phase Power Systems
C.Y. Evrenosoğlu*, E. Akleman**, O.Ö. Özener** and A. Abur*
Texas A&M University
TexGRAPH 2005
* : Dept. of Electrical Engineering
** : Dept. of Architecture (Visualization Lab.)
Contents
• Motivation and Objectives
• Proposed Methods
• Animation Program and Transients Sculpting
• Visualization of Voltage Profile During Transients
• Conclusions and Future Work
Power Systems & Transients
• Transmission Lines : carry power from generation areas to
distribution areas (customers, industrial areas…etc)
• Faults (Lightning, line touchdown…etc) on transmission
lines creates “Transients”
Motivation and Objectives

Visualization and 3D animation of power system
electromagnetic transients
with a user friendly graphical interface
for better understanding of the entire system or an
important part of a system during a transient
Proposed Methods
A. Electromagnetic Transients Animation Program and Transients
Sculpting
•
Animation Program
•
Voltage-Line Distance-Time graphics (Transient
Sculpting)
B. Visualization of Voltage Profile During Transients
•
Triangular Representation
•
Circular Representation
•
Use of RGB Coloring (phase voltages and modal
voltages)
Contents
• Motivation and Objectives
• Proposed Methods
• Animation Program and Transients Sculpting
• Visualization of Voltage Profile During Transients
• Conclusions and Future Work
A . Electromagnetic Transients Animation Program
and Transients Sculpting
Left side is for editing the system
or for viewing the voltage-line
distance-time figure of a
transmission line during a
transient.
Right side is for viewing the
animation.
DC energization
of a line with open end-1
TRANSIENT SCULPTING
(Voltage - Line Distance – Time)
V
line
time
DC energization
of a line with open end-2
t
Line
Bewley Diagram
Contents
• Motivation and Objectives
• Proposed Methods
• Animation Program and Transients Sculpting
• Visualization of Voltage Profile During Transients
• Conclusions and Future Work
B. Visualization of Voltage Profile During
Transients
I. Triangular representation
II. Circular representation
III. Use of RGB coloring
Two bus system is studied for 1 phase to ground
and 3 phase faults, voltage data at 10 intermediate
points along the line are obtained for the studies.
I. Triangular Representation
t
Triangular Animation
|V|
|V|
Line sections
II. Circular Representation
t
Modal
Trans.
Circular Animation
|V|
|V|
Line sections
III. Use of RGB Coloring
Form a picture using the phase voltage data
along the transmission line
R = 0 – 255
G = 0 – 255
B = 0 – 255
Line
Phase Voltages – No Fault
time
Line
Phase Voltages – 1 phase-to-ground
time
Line
Phase Voltages – 3 phase-to-ground
time
Modal Voltages
This time each pixel on the picture consists of
only ground or only aerial voltages. The
ground mode information corresponds to RED
while the aerial mode information corresponds
to GREEN. In both cases remaining two color
channels are 0 for all pixels.
Line
Aerial Mode Voltage – 1 phase-to-ground
time
Line
Aerial Mode Voltage – 3 phase-to-ground
time
Conclusions and Future Work
 Software tool facilitates flexible visualization of electromagnetic
transients
 The current software is for single phase circuits.
 This work is being extended to study faults in 3 phase, more complex
power system topologies
 An electromagnetic transient program is being written to be used
within the animation software.
 RGB Coloring is very useful for both illustrating the characteristics of
traveling wave and locating the fault