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A

Seminar Report

On

“Practical Training”

Taken at

220 kV G.S.S. MANSAROVAR, JAIPUR (RRVPNL)

And

Submitted in the partial fulfillment for award the degree of

Bachelor of Technology

In

Electrical Engineering

From

Rajasthan Technical University, Kota

Session 2014-2015

Submitted To Submitted by

Mr. Mukesh Kumar Jain Utkarsh Saxena (Head of Department) B.Tech. 4thyear(7thSem.) . Roll no. 11EIEEE061

Submitted to

Department of Electrical Engineering

INTERNATIONAL INSTITUTE OF MANAGEMENT ENGINEERING &

TECHNOLOGY, JAIPUR

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ACKNOWLEDGEMENT

I feel immense pleasure in conveying my heartiest thanks and deep sense of gratitude to Head of the Electrical Engineering Department of INTERNATIONAL INSTITUTE OF MANAGEMENT ENGINEERING & TECHNOLOGY, Jaipur for his efforts and for

technical as well as moral support.

Engineers and other technical and non-technical staff, for helping in understanding the various aspects and constructional detail of work and site in 220kV Grid-Sub Station, Mansarovar, Jaipur.

It may not be possible for me to acknowledge the support of all my friends, but I am thankful to all my colleagues and other trainees for their valuable ideas and support during training

period.

Utkarsh Saxena

(11EIEE061)

Electrical Engineering

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PREFACE

A rapid rise in the use of electricity is placing a very heavy responsibility on electrical undertaking to maintain their electrical network in perfect condition, young engineers is

called upon to do design, system planning and construction and maintenance of electric system before he had much experience and practice soon may be responsible for specialize operation in an ever expending industry. Theoretical knowledge gained in their college

courses need to be supplemented with practical know-how to face this professional challenge, so……..

As a part of our practical training we have to attempt the rule of Rajasthan Technical University, Kota. I look my practical training at 220 kV G.S.S. Mansarovar, Jaipur. Since my training center was of Grid Sub-station hence I have included all updated

information, to the extent possible, including general introduction and brief description of starting sub-station of 220 kV G.S.S. in this study report.

During my 30 Working days practical training, I had undertaken my training at 220 kV G.S.S. at Mansarovar, Jaipur. I had taken my first practical training at 220 kV G.S.S. Mansarovar, Jaipur.

The period of training was from 02/06/2014 TO 01/07/2014. This report dealt with the practical knowledge of general theory and technical data/detail of

equipment, which I have gained during the training period at 220 kV GSS, Mansarovar, Jaipur.

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CONTENTS

1. Introduction 02

2. Bus bars 03 3. Isolators 04

4. Insulators 4.1 Type of insulators 05

4.1.1 Pin type 05

4.1.2 Suspension type 06 4.1.3 Strain type 06

5. Protective relays 5.1 Distance relays 08 5.2 Buchholz relay 09

6. Circuit Breakers 6.1 Operating principle 10

6.2 Classification of circuit breakers 10 6.3 SF6 Circuit Breaker 10 6.4 Air Blast Circuit Breaker 12

6.5 Oil Circuit Breaker 13 6.6 Bulk Oil Circuit Breaker 14 6.7 Minimum Oil Circuit Breaker 14

7. Power Transformers 15 8. Current transformer 18

9. Potential transformer 9.1 Capacitive voltage transformer 20 9.2 Transformer oil & its testing 21

10. Lightening Arrestor. 10.1 220 kV lightening Arrestor Rating 23

11. Control Panel 24 12. Measuring Instruments 27 13. Capacitor Bank 28

14. Earthing of the system. 29 15. Ratings

15.1 Transformers 30 15.2 Circuit Breaker 30 15.3 Battery Charger 31

15.4 Current Transformer… 31 15.5 Capacitive Voltage Transformer 31

16. Power Line Carrier Communication 32 17. Corona effect 33 18. Merits and demerits 35

19. Conclusion 36

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LIST OF FIGURES

Sr No. Title Page No.

Fig.1.1 Incoming & Outgoing feeder 1

Fig.3.1 Isolator 4 Fig.4.1 Pin type insulator 5

Fig.4.2 Suspension type insulator 6 Fig. 4.3 Strain insulator 6 Fig.5.1 Relays 7

Fig.5.2 Buccholz relay 9 Fig.6.1 SF6 Circuit breaker 10

Fig.6.2 Air blast circuit breaker 12 Fig.7.1 Power Transformer 16 Fig.7.2 Radiator with fan 16

Fig.7.3 Winding and oil temperature indicator 17 Fig.7.4 Silica gel breather 17

Fig.8.1 Current transformers 18 Fig.9.1 CVT Connection 19 Fig.9.2 Capacitor voltage transformer 20

Fig.10.1 Lightning arrester 23 Fig.11.1 Control room 24 Fig.11.2 Tap changer 26

Fig.12.1 Capacitor bank 28