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Modeling and Simulation of a Distribution STATCOM (D-

STATCOM) for Power Quality Problems-Voltage Sag and

Swell ased on Sinusoidal Pulse !idt" Modulation

A thesis submitted in partial fulfillment of the requirement for the award of the degree

Degree in

AC#$%O& O' T$C#O%O*

in

$%$CT&+CA% , $%$CT&O+CS $+$$&+

by

agara.u (/0A1/A02/2)

MSi3arama4ris"na (/0A1/A0225)

T6o"n !esly (/0A1/A0278)

9Vamsi (/0A1/A0227)

:nder t"e $steemed uidan;e of

Srimsambasi3arao< MTe;"

(Assistant =rofessor)

De=artment of $le;tri;al , $le;troni;s $ngineering

%O*O%A +ST+T:T$ O' T$C#O%O* AD MAA$M$T

(Affiliated to 6awa"arlal e"ru Te;"nologi;al :ni3ersity< 9a4inada)

D"uli=alla->221/2

untur Distri;t< And"ra Prades"

(20/7-20/1)

%O*O%A +ST+T:T$ O' T$C#O%O* AD MAA$M$T


2/11

(Affiliated to 6awa"arlal e"ru te;"nologi;al uni3ersity< 9a4inada)

D"uli=alla->221/2

untur Distri;t< And"ra Prades"

D$PA&TM$T O' $%$CT&+CA% AD $%$CT&O+CS $+$$&+

C$&T+'+CAT$

This is to certify that the project report entitled ?Modeling and Simulation of

a Distribution STATCOM (D-STATCOM) for Power Quality Problems-Voltage

Sag and Swell ased on Sinusoidal Pulse !idt" Modulation is the bonafide work

of /)agara.u 2) MSi3arama4ris"na 7) T6o"nwesly 1) 9Vamsi submitted

to the department of Electrical And Electronics Engineering, Loyola nstitute of

Technology And !anagement, in partial fulfillment of the requirements for the award

of the degree in bachelor of technology in electrical and electronics engineering"

SriMSambasi3arao< MTe;" Prof D Slee3a &eddy< MTe;"


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#e, the students of Loyola nstitute of Technology And

!anagement, Dhulipalla, $untur District, Andhra %radesh, hereby

declare that this project work titled as &Modeling and Simulation of a

Distribution STATCOM (D-STATCOM) for Power Quality

Problems-Voltage Sag and Swell ased on Sinusoidal Pulse !idt"

Modulation being submitted to the department of $le;tri;al and

$le;troni;s $ngineeringof this nstitute, affiliated to 'awaharlal (ehru

Technological )ni*ersity, +akinada, for the award of the Degree in

achelor -f Technology in Electrical and Electronics Engineering is a

record of bonafide work done by us at %oyola +nstitute of Te;"nology

And Managementand it has not been submitted to any other institute or

uni*ersity for the award of any other degree"

*

Pro.e;t Asso;iates

/) agara.u (/0A1/A02/2)

2) MSi3arama4ris"na (/0A1/A0225)

7) T6o"nwesly (/0A1/A0278)

1) 9Vamsi (/0A1/A0227)

AC9O!%$D$M$T

3


4/11

#e are greatly indebted to my college %O*O%A +ST+T:T$ O'

T$C#O%O* AD MAA$M$T that has pro*ided us a healthy

en*ironment to dri*e me to achie*e my ambitions and goals"

#e are *ery much glad for ha*ing the support of the principal

DrS &eddy, !"Tech, %hD who inspired me with his words filled with dedication

and discipline towards work"

#e e.press our sincere thanks and gratitude to the department head,

=rofDS%$$VA &$DD*, !"Tech for his e.cellent super *ision and guidance"

#e are to e.press deep sense of gratitude to my internal guide

/ri M&, M Sambasi3arao< !"Tech for his co0operation, encouragement and timely

suggestions" am *ery grateful to my parents for their lo*ing care and moral support

during the project"

#e would like to thank all the staff members of $le;tri;al and$le;troni;s

$ngineeringfor their co0operation"

(e*ertheless, we e.press our appreciation to one and all, whose creati*e ideas

and suggestions helped us in completing this project successfully"

y

%roject Associates"

A/T1A2T

4


5/11

This project presents the systematic procedure of the modeling and

simulation of a distribution /TAT2-! 3D0/TAT2-!4 for power quality

problems, *oltage sag and swell based on the sinusoidal pulse width

modulation 3/%#!4 technique" %ower quality is an occurrence

manifested as a nonstandard *oltage, current or frequency that results in a

failure of end use equipment" The major problems dealt here is the

*oltage sag and swell" To sol*e this problems, custom power de*ice are

used" -ne of those de*ices is the distribution /TAT2-! 3D0/TAT2-!4,

which is the most efficient and effecti*e modern custom power de*ice

used in power distribution networks. D-STATCOM injects a

current into the system to correct the vota!e sa! an"

swe. The contro o# the vota!e source converter $%SC& is

"one with the he' o# S()M. The (ro'ose" D-STATCOM is

mo"ee" an" simuate" usin! MAT*A+,SM*/0 so#tware.

CONTENTS

C#APT$& AM$PAGE NO

2ertificate ii

1


6/11

Declaration ii

Acknowledgments v

Abstract %

2ontents vi-viii

list of figures i-

list of tables i

/+T&OD:CT+O 01

5"5 introduction 01

5"6 aim of the project 02

5"7 objecti*es of the project 02

5"8 significance of work 02

5"9 organi:ation of project 02

2 PO!$& Q:A%+T* 03

6"5 problems of power quality 03

6"5"5" transients 01 6"5"6" interruptions 01

6"5"7" sag;under *oltage 0>

6"5"8" swell;o*er*oltage 0>

6"5"9" harmonic distortion 0@

6"5"

1 M$T#ODO%O*/@

8"5 flowchart for the methodology /@

>%OC9S :S$D 'O& S+M:%AT+O /

9"5 three phase source /

9"6 scope /5

9"7 three phase transformer windings /8

9"8 measurement 20

9"9 faults 22

9"< discrete three phase sequence analyser 2>

9"= timer 2@9"> pi controller 2


7/11

9"?uni*ersal bridge 2

9"5@ L2L passi*e filter 70

9"55control circuit 7/

9"56pwm generator 7/

9"57three phase 1L2 branch 72

9"58terminator 779"59transformer 71

9"5


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%+ST O' '+:&$S

S no 'igure ame 'ig no Page no

6 Transients 2.6 4 2 nterruptions 2.2 4 3 /ag;)nder oltage 2.3 1 4 /well;-*er oltage 2.4 1 1 Barmonic Distortion 2.1 oltage /pike 2. 5 (oise 2.5 5 7 /chematic Diagram -f D0/TAT2-! 3.6 62

8 oltage /ource 2on*erter 3.2 63 69 lock Diagram -f 2ontroller /ystem 3.3 64 66 Energy /torage 2ircuit 3.4 64 62 L"2"L %assi*e Cilter 3.1 61 63 Clow 2hart -f !ethodology 4.6 6 64 Three %hase /ource 1.6 65 61 /cope 1.2 67 6 Three %hase Transformer #indings 1.3 68 65 !easurements 1.4 29 67 Caults 1.1 22 68 Discrete Three %hase /equence Analy:er 1. 21 29 Timer 1.5 2 26 %i 2ontroller 1.7 25 22 )ni*ersal ridge 1.8 25 23 L"2"L %assi*e Cilter 1.69 39 24 2ontrol 2ircuit 1.66 36 21 %"#"! $enerator 1.62 36 2 Three %hase 1L2 ranch 1.63 32 25 Terminator 1.64 33 27 Transformer 1.61 34 28 reakers 1.6 34

39 Three %hase reaker 1.6.6 35 36 2onnection %ort 1.65 38 32 !odel Cor #ithout D0/TAT2-! L2L %assi*e

Cilter

.6 49

33 !odel Cor #ithout D0/TAT2-! #ith L2L %assi*e

Cilter

.2 46

34 !odel Cor #ith D0/TAT2-! #ith L2L %assi*e

Cilter

.3 42

31 T%$ Cault 5.2.6 44

3 DL$ Cault 5.2.2 44 35 /L$ Cault 5.2.3 41

7


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37 LL Cault 5.2.4 41 38 Barmonic /pectrum Cor DL$ Cault 5.4.6 45 49 Barmonic /pectrum Cor LL Cault 5.4.2 45 46 Barmonic /pectrum Cor /L$ Cault 5.4.3 47

42 Barmonic /pectrum Cor T%$ Cault 5.4.4 47

%ist of Tables

/"(o Table (ame %age (o

5 7"5 list and *alue of parameters use in simulation 59

6 ="5" 1esults of *oltage sags for different types of fault" 87

7 ="6 with insertion of d0/TAT2-! 87

8 ="7 results of current harmonic without L2L passi*e

filter

8 E/%A2+ Eigen /ystem %ackage5? )%/ )ninnterruptible %ower /upply

6@ ! !odulation nde.

65 TBD Total Barmonic Distortion

66 !-/CET !etal -.ide /emiconductor Cield Effect

Transistor

66

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