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

Right side is for viewing the animation.

Left side is for editing the system or for viewing the voltage-line distance-time figure of a transmission line during a transient.

DC energization of a line with open end-1

linetime

V

TRANSIENT SCULPTING(Voltage - Line Distance – Time)

DC energization of a line with open end-2

Bewley Diagram

Line

t

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

Line sections|V|

|V|

II. Circular Representation

Modal

Trans.

t

Circular Animation

Line sections|V|

|V|

III. Use of RGB ColoringForm a picture using the phase voltage data along the transmission line

R = 0 – 255

G = 0 – 255

B = 0 – 255

Phase Voltages – No FaultL

ine

time

Phase Voltages – 1 phase-to-groundL

ine

time

Phase Voltages – 3 phase-to-groundL

ine

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.

Aerial Mode Voltage – 1 phase-to-groundL

ine

time

Aerial Mode Voltage – 3 phase-to-groundL

ine

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