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Unified Power Flow

Controller as PowerSystem StabilizerSupervisors: Prof. J.R. Lucus

Dr.P.S.N.de Silva

Presented by: W.K.M.P.Warusapperuma

M.Sc in Electrical Engineering

Index No: 05/8403

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Project Scope - Summery

This project is formulated to study

Capability of the Unified Power Flow

Controller (UPFC) as a power system

stabilizer

As a case study Matugama, Kukule,

Horana Pseudo Island of the nationalpower system is selected.

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Project Progress Progress by July

Collected required Data from CEB

Studied the MatLab Simulink software

Studied the UPFC model in MatLab Progress by October

Developed a theoretical back ground

Created the MatLab Model of the sub-network selected.

Studied the created network with the UPFC model with differentpossible cases.

Progress by December Completed the Thesis and Draft submitted to Supervisors

Draft submitted on 28th December 2008

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Structure of the Thesis

Chapter 01: Introduction Introduction to the Project

Introduction to the stability Introduction to the FACTS devices

Chapter 02:UPFC as a Power system

stabilizer Unified Power flow controller

UPFC as a power flow controller

UPFC as a Power system stabilizer

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Structure of the Thesis Chapter 03: Case Study

Introduction

Matlab modeling UPFC model in the MatLab

UPFC as a Power system stabilizer

Chapter 04: Simulation and Results Analysis Fault created on Matugama Horana Transmission line

Fault created on Panadura - Pannipitiya Transmission line Fault created on Panadura Transmission line

Discussion

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Structure of the Thesis

Chapter 05: Conclusion Conclusions and Remarks

Recommendation for future research

Appendix

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Stability

Transient stabilityis the ability of the

power system to maintain synchronism

when subjected to a severe transient

disturbance.

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Rotor angle response to a transient

disturbance

Rot

or

ang

le

0.5 1.0 1.5 2.0 Time in seconds

Case 2

Case 3

Case 1

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UPFC

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UPFC introduce additional damping

to the system

em ppdt

dD

dt

dM !

HH

2

2

G

V

Infinity Bus

dt

dKbDbP

dt

dM

m

'' )()sin(

HH

[(

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Control Loops

Power

flow

controlloop

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Case study

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Model in Simulink

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Fault created on Matugama

Horana Transmission line

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Conclusion

UPFC provide additional damping

coefficient to the power system under

transient condition.

Therefore, it has been decided that the

UPFC can perform as a stabilizer.

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References IEEE papers

Design of decentralized Power system stabilizers for Multi-machinepower system using model reduction and fast output samplingtechniques.

A study of TCSC controller design for power system stabilityimprovement.

Damping of electromechanical modes using power system stabilizers

Stability improvement using TCSC in radial power system.

Dynamic voltage stability analysis in multi-machine power system.

Other books

Power system stabilizer Mitsubishi Long term transmission development plan CEB

Power system stability and control Prabha Kundur

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Thank you.