A training report on 220 KV grid substation

1. PRESENTED BY:
Roshan lal Kumawat
DEPARTMENT OF ELECTRICAL ENGINEERING
220 KV GSS

2. 
Introduction
Definition Of sub-Station
Component Of sub-station
LightningArrestor
Current Transformer
Capacitor voltage Transformer
PLCC
Isolater
Circuit Breaker
Bus Bar
Transformer
Protective relay
Control room
Battery room
Conclusion

3. RVPNL is a company of Rajasthan State Electricity
Board(RSEB) established by government of Rajasthan. Aim of
RVPNL is to provide reliable transmission service to customers.
220 KV G.S.S., Sikar is a part of RVPNL.
.

4. INCOMING FEEDERS
220kV:-
 PGCIL 1
 PGCIL 2

5. 220KV
REENGUS- I
REENGUS- II
DHOD
132KV
LAXMANGARH
KUDAN
PIPRALI
DHOD
WATER WORKS
OUTGOING FEEDERS

6. SINGLE LINE DIAGRAM 220KV GSS, SIKAR

7. 
Sub-station is a subsidiary station of an electric generation
,transmission and distribution system where voltage is
transformed from high to low or low to high voltage using
transformers. Electric Power may flow through several sub-
station between generated plant and consumer and may be
changed in voltage in several steps.

8. 
1. Primary power lines
2. Ground wire
3. Overhead lines
 Transformer for measurement of electric voltage
1. Disconnect switch
2. Circuit breaker
3. Current Transformer
4. Lightning arrester
5. Main Transformer
6. Control building
7. Security fence
8. Secondary power lines

9. 
als
Lightning arrester is a protective
 device which provides protection
 against high voltage surges.A
 lightning arrester has two termin
 viz a high voltage terminal and
 a ground terminal.

10. 
Capacitive
voltage
transformers are
special kind of
power transformers
using capacitors to
step down the
voltage.  capacitive
 voltage
 transformer

11. 
 Wave trap
 A Line trap (high-frequency
stopper) is a maintenance-free
inductor, mounted inline on
high
voltage AC transmission
power lines to prevent the
transmission of high
frequency (40 kHz to
1000 kHz) carrier signals
of line communication to
unwanted destinations.

12. 
PLCC for exchange of data and transfer of messages between
substations, voice communication is necessary. For this purpose
high frequency carrier current is transmitted over same
transmission line on which power is transmitted. Hence this
communication is called as power line carrier communication.

13. 
maintenance.
It operates
when there
is no load. It
is also used
It isolates to change
the devices bus bar line
from live from main to line
when reserve or there is a
vise versa.
 220 KV ISOLATOR

14. 
C.T. is used to measure high
value of current. C.T.`s
secondary is connected to
relay to protect the system
against Overcurrent.
 Current
 Transformer

15. 
Circuit
breaker
two
popular
breakers
used
Today,
most
Circuit
are
in
substation
which are:
Vacuum Circuit
breaker
 & SF6
Circuit breaker.
Oil and Air
Circuit
was
earlier
blast
breaker
used in
decades.

16. 
Bus Bars are common
electrical component
through which a large
no. of feeders
operating at same
voltage have to be
connected.

17. 
The transformer is a static
apparatus, which receives
power/energy at it, one circuit
and transmits it to other circuit
without changing the
frequency and power.

18. 
1. Primary and secondary coils (circuit) or windings.
2. Core
3. Main Tank
4. Conservator
5. Breather
6. Radiator
7. Buchholz relay
8. Bushings (HT & LT) (Primary or secondary)
9. Cooling fans
10. Tap changer (on load and off load)
11. NGR (Neutral Grounding Resistance) to minimize the earth
fault current

19. 
 To step-up or step-down the
voltage and transfer power
from one a.c. voltage to
another a.c. voltage at the
same frequency.

20. Buchholz relays:-
Buchholz relays are used in most oil insulated electric
transformers where there is an expansion tank.
Buchholz relays are particularly efficient in detecting
and capturing gases that may form inside the
transformers and for instant system shut down in case
of a serious defect.
CONSERVATOR:-
The conservator provides space for the expansion of
oil.

21. BREATHER
The breather filled with silica gels are provided
to separate moisture from the aspirated air.
The silica gel turns blue when it becomes
saturate with moisture after which it needs to
be replaced.
AIR RELEASE PLUGS
These air releasing plugs are made from very
excellent quality raw material which ensure
hassle free work performance. These plugs
finds its applications in various industrial
sectors. We are able to customized these plugs
as per customer requirement with market
competitive rates.
BREATHER
AIR RELEASE PLUGS

22. RADIATORS
The radiator of transformer
accelerates the cooling rate of
transformer. Thus, it plays a vital role
in increasing loading capacity of
an electrical transformer. This is basic
function of radiator of an electrical
power.
TRANSFORMER RATING
RADIATORS

23. 
The capacitor bank provides
reactive power at grid sub-station.the
voltage problem frequently reduce
so of circulation of reactive power.

24. A protective relay isa
device that detects the
fault and initiates the
operation of the circuit
breaker to isolator the
defective element from
the rest of the system.

25. Differential Relay
Overcurrent Relay
Distance Relay
Auxiliary Relay
TYPES OF
RELAY

26. 

27. BATTERY
ROOM
A battery room is a room
in a facility used to house
batteries for backup or
uninterruptible power
system.