60 DAYS TRAINING PRESENTATION ON 400 KV GSS RAISER

1. A
PRESENTATION OF
PRACTICAL TRAINING
ON
“400kv GSS RAISER”
Submitted To :-
Surendra Singh Tanwar
(Head Of E.E. Deptt.)
Submitted By :-
Yatendra Parashar
EE(II Shift)

2. CONTENTS
• CIRTIFICATE
• GENERAL DISCUSSION ON SUB STATIONS
• INTRODUCTION OF 400 KV GSS
• SINGLE LINE DIAGRAM
• EQUIPMENTS USED IN SUBSTATION

3. CIRTIFICATE

4. GENERAL DISCUSSION
Substation:- A station is a subsidiary station of an electricity
generation, transmission, & distribution system where voltage is
transformed to high to low or the reverse using transformers.
A substation generally have switching, protection, & control equipment &
one or more transformers.
Types:-
(a) Transmission substation
(b) Distribution substation
Transmission substation connects two or more transmission lines.
Distribution substation transfers power from transmission system to
the distribution system of an area.

5. INTRODUCTION OF GSS
TWO YARDS
I. 400 KV
II. 220 KV
1 . 4 0 0 K V
BHADLA
SIKAR
MERTA
DEEDWANA
 3 INCOMING LINE FROM SURATGARH
 OUTGOING FEEDERS:-
2. 220 KV
GAJNER
BIKANER
NOKHA
DUNGARHGARH

6. Single Line Diagram

7. EQUIPMENT USED IN SUBSTATION
• POWER TRANSFORMER
• LIGHTNING ARRESTOR
• INSTRUMENT TRANSFORMER
• CAPACITIVE VOLTAGE TRANSFORMER
• CIRCUIT BREAKER
• RELAY
• INSULATOR
• ISOLATOR
• POWER LINE CARRIER COMMUNICATION(PLCC)

8. POWER TRANSFORMER
Power transformers are used in transmission network of
higher voltages for step-up and step down.

9. LIGHTNING ARRESTOR
.
It discharge the over voltage surges to earth
and protect the equipment insulation from
switching surges and lightning surges.
It located at the starting of the substation as
seen from incoming transmission lines and is
the first equipment of the substation.

10. INSTRUMENT TRANSFORMER
• The lines in Sub-Station operates at high voltage & current of
thousands ampere. The measuring device are constructed to measure
low voltage & current. These are the small transformers used for the
supply low value of current & voltage to the measuring instruments.
There are two type of Instrument Transformer:-
1. Current transformer (CT)
2. Voltage transformer (PT)

11. Current transformer (CT)
• CT is a type of instrument transformer that is
used in power system for measurement, detection,
protection of the system.
•When current in a circuit is too high to apply
directly measuring instruments, a CT produces a
reduced current accurately proportional to the
current in the circuit, which can be conveniently
connected to measuring and recording instruments.

12. POTENTIAL TRANSFORMER
• It step down the voltage to
something that meters can handle.
• Potential transformers are instrument
transformers. They have a large
number of primary turns and a few
number of secondary turns.

13. CAPACITOR VOLTAGE TRANSFORMER
A capacitor voltage transformer (CVT),
or capacitance coupled voltage
transformer (CCVT) is a transformer used
in power systems to step down extra high
voltage signals and provide a low
voltage signal, for measurement or to operate a
protective relay.

14. • A circuit breaker is a switch which work is to
make or break a circuit manually or automatically
under abnormal condition.
• It designed to protect an electrical circuit from
damage caused by overload or short circuit.
• Its basic function is to detect a fault condition and
discontinue the electric flow.

15. Types of circuit breaker
Based on the medium used
A) Air Blast Circuit Breaker
B) SF6 Circuit Breaker
C) Vacuum Circuit Breaker
D) Minimum Oil Circuit Breaker

16. RELAYS
Relay are switches that open and close circuits electromechanically. They control
one electrical circuit by opening and closing contacts in another circuit.
Types of relay :-
1.Over voltage relays
2.Over current relays
3.I.D.M.T. fault relay
4.Earth fault relay
5.Buchholz ’s relay
6.Differential relay
Buchholz ’s relay

17. Insulators
An insulator also called a dielectric, is a material that resists the flow of electric
current.
Insulators are used in electrical equipment to support and separate
electrical conductors without allowing current through themselves.
Types of insulators:-
1. Pin type
2. Suspension type
3. Strain type
4. Shackle type
5. Stay type

18. .
PIN TYPE SUSPENSION TYPE STRAIN TYPE
SHACKLE TYPE STAY TYPE

19. Isolator
• Whenever there is a fault in any transmission line it is necessary to
disconnect it from the unit for repair work, on which work can be done.
• Isolator is used to disconnect the faulty part form the unit & for safety
purpose.

20. PLCC & Wave Trap
• Power line communication carries
data on conductor that is also used
simultaneously for AC electric
power transmission or electric power
distribution to consumers.
• Wave trap is a device used in the
substation at the incoming lines.
Wave trap is also called as line trap.
The wave traps extracts the high
frequency information from the
power lines and route it to the
telecomm panels.

21. Thank You