Internship Report of training in 220 KV substation

1. L. D. College Of Engineering, Ahmedabad
GUJARAT TECHNOLOGY UNIVERSITY
7th Semester Industrial Training on 220 KV Substation Mitha
GETCO
MOHAMMAD SAUD PATHAN
(200280109010)
B.E.(IV Year)
Under Mentorship Of
Bhavin J Shah
DEPARTMENT OF ELECTRICAL ENGINEERING

2. TABLE OF CONTENT
 Introduction
 Single Line Diagram
 220 KV Sub-Station
 Panel Section
 Yard Section
 Battery Room
 Components of Substation
 Conclusion

3. INTRODUCTION
Gujarat Energy Transmission Corporation
(GETCO) is the company responsible for electricity
transmission and distribution within the Indian state of
Gujarat.
GETCO Mitha 220 KV substation was
established in 2003.
GETCO Mitha substation is basically
contains two substation one of 220 KV & other of
220/66 KV.

4. Single line diagram

5. 220 KV INCOMMING SECTION:
There are nine outgoing lines of 220 KV-
1. Sankhari Line 1
2. Sankhari Line 2
3. Katosan Railway
4. Santhal ONGC
5. Soja
6. Bechraji 1
7. Bechraji 2
8. Vadavi 1
9. Vadavi 2

6. • 66 KV OUTGOING SECTION:
There are ten outgoing lines of 66 KV-
1. Linch 1
2. Linch 2
3. Jotana – Linch
4. Jotana – Suraj
5. Modhera
6. Motap
7. Mudela
8. Katosan
9. Balol
10. Aasjol

7. 220 KV SUB-STATION:
IT IS DEVIDED INTO THREE PARTS:
TWO MAIN PART IS-
1. PANEL SECTION
-CONTROL PANEL
-RELAYAND PROTECTION PANEL
2. YARD SECTION
-220 KV SECTION
-66 KV SECTION
ONE OTHER
PART IS__
1.BA
TTERY ROOM

8. 220 KV Substation Panel Section
220 KV Substation Battery Room

9. PANEL SECTION
 it is a room which contains all type of panels.
 it has two sections:
 Control Panel Section:
It contain panels related to controlling of
instruments. E.g. feeder panel, X-mer
panel, etc.
 Relay and Protection Panel Section:
It contains panel related to relay system and
protection systems. E.g. relay panel, line
protection panel, etc.

10. YARD SECTION
220 KV SECTION…
• IT WORKS ON 220 KV.
•THEREARE THREE BUS BARS IN WHICH TWO
IS MAIN BUS AND OTHER ONE IS TRANFER
BUS.
•THIS LINE IS DIRECTLY FEDED TO MANY
OTHER SUBSTATIONS LIKE Vadavi, Sankhari,
Bechraji ETC.

11. 66 KV…
• IT WORKS ON 66 KV.
•THEREARE TWO BUS BARS IN WHICH ONE IS
MAIN BUS AND OTHER ONE IS TRANFER
BUS.
•220 KV VOLTAGE IS CONVERTED TO 66 KV
VOLTAGE USING FOUR TRANSFORMERS IN
WHICH ARE OF 100 MVA.
•IN OTHER WORDS IT IS 220 KV/66 KV
SUBSTATION.
•THIS LINE IS DIRECTLY FEDED TO MANY
OTHER SUBSTATIONS LIKE Linch, Modhera,
Motap ETC.

12. BA
TTERY ROOM
220 DC SUPPLY REQUIRED FOR OPERATION
OF CIRCUIT BREAKERS-
•110 BATTERIES OF 2V , 250AH{FOR
REGULER USE}
•110 BATTERIES OF 2V , 250AH{FOR
BACKUP}
DC SUPPLY REQUIRED FOR OPERATION IN
CONTROL ROOM-
•BA
TTERIES OF 2V , 250AH (EXIDE
INDUSTRIAL)

13. COMPONENTS OF SUB-STATION
•RELAY
•CIRCUIT BREAKER
•ISOLATOR
•TRANSFORMER
•CURRENT TRANSFORMER (CT)
•POTENTIALTRANFORMER (PT)
•CAPACITOR VOLTAGE TRANSFORMER (CVT)
•LIGHTENING ARRESTER( LA)
•FEEDER
•BUS-BAR
•INSULATOR
•CAPACITOR BANK
•W
A
VE TRAP

14. RELAY
Arelay is an electrically operated switch.
A relay is a sensing device which sense the abnormal
condition and then produce an alarm or open the
breaker contact.
CIRCUIT BREAKER
A circuit breaker is an automatically operated
electrical switch designed to protect an electrical
circuit from damage caused by over-current or
overload or short circuit.
ISOLATOR
Isolator is used to ensure that an electrical circuit is
completely de-energized for service or maintenance.

15. SF6 Circuit Breaker
Over Current Relay
Isolator

16. TRANSFORMER
1. 100 MVA TR1(EMCO)
2. 100 MVA TR2(EMCO)
3. 100 MVA TR3(EMCO)
4. 100 MVA TR4(NOT INSTALLED BUT UNDER PROCESS)
 66/11 KV TRANSFORMER-
1. 5 MVA(FOR SUB-STATION)
A transformer is an electrical
device that transfers electrical
energy between two or more
circuits through electromagnetic
induction.
There are five step down
transformer at substation:
220/66 KV TRANSFORMER-

17. CURRENT TRANSFORMER
It is a step up transformer which is used to measure the
current, by stepping up the voltage level.
POTENTIALTRANSFORMER
It is a step down transformer which is used to measure
the voltage, by stepping up the voltage level.
CAPACITOR VOLTAGE TRANSFORMER
A capacitor voltage transformer (CVT) is a
transformer used to step down extra high voltage
signals and provide a low voltage signal for voltage
measurement & It also forms a carrier communication
network through the transmission network.

18. Current Transformer Potential Transformer
Capacitive Voltage
Transformer

19. LIGHTENINGARRESTER
It provides low impedance path for
high frequency and high current
supply.
FEEDER
A set of conductors that originate at
a primary distribution centre and
supply power to one or more
secondary distribution centre.
BUS-BAR
An assembly of conductors for
collecting electric currents and
distributing them to outgoing
feeders.
Lighting Arrester

20. INSULATOR
A material of such low conductivity that the flow of
current through it is negligible.
CAPACITOR BANK
It is used to componsate the power factor from lagging
to leading nature.
WAVETRAP
Tripping the high frequency communication signal
sent on the line from the remote substation and
diverting them to the telecom panel in the substation
control room.

21. Insulator
Wave Trap

22. CONCLUSION
An engineer needs to have not just theoretical
but practical as well as and so every student is
supposed to undergo practical training session
3rd
after year where I have imbibed the
knowledge about transmission, distribution and
maintenance with economical issues related to
it.
At last I would like to say that practical training
taken at
broadened
220 KV substation
my knowledge and
Mitha has
widened my
thinking as a professional.

23. At last i would say……
SAVE ENERGY,SAVE FUTURE
THANK YOU..