1. The document presents information on a 220 kV grid substation in Sitapura, Jaipur. It discusses the key components and functions of a substation, including transformers, bus bars, circuit breakers, protective relays, isolators, lightning arresters, and more. 2. The substation contains various types of transformers that step voltage up or down, including power transformers, current transformers, and potential transformers. It also has equipment for protection, isolation, switching, and measurement. 3. Control and battery rooms are included to provide DC power for signaling, remote control, and alarms in the substation.

1. Govt. Engineering College, Bikaner
A
PRESENTATION
ON
220 kV Grid Substation,Sitapura (Jaipur)
Submitted To:. Submitted By:
Mr. Vinod Kumar Yadav. Ashish Kumar Bairwa
Asst. Professor Dept. Of EE B.tech (4th yr)
GECB, Bikaner 15EEBEE711

2. SUBSTATION


A Station is a subsidiary station of an electricity generation , transmission &
disrtibution system where voltage is transmitted to high to low or the reverse
using transformer.
A substation generally have switching , protection & control equipment & one or
more transformers.
Fig.- Single line diagram

3. LIGHTING ARRESTER



Lighting Arrester is a protective
device which provides protection
against high voltage from lighting.
A Lighting Arrester has two
terminal viz a high voltage terminal
& a ground terminal.
It is used only for overhead line.

4. BUS BAR


1.
2.

A Bus Bar is a conducting bar
that caries heavy currents to supply
several electric circuits.
Bus Bar is made from ‘Cu’ & ‘Ar’.
TYPE OF BUS BAR
Main Bus Bar
Auxiliary Bus Bar
One Bus Bar is Main Bus Bar
& another is Auxikiary Bus Bar.

5. TRANSFORMER

1.
2.
3.
4.
A transformer is a static device that transfers Elecrical energy
from one Electrical circuit to another Electrical circuit by means
of a common magnetic circuit.
TRANSFORMER USED IN GSS
POWER TRNSFORMER
CURRENT TRANSFORMER
POTENTIAL TRANSFORMER
STATION TRANSFORMER

6. POWER TRANSFORMER
To step down the voltage & transfer power from one A.C.
voltage to another A.C. voltage at same frequency.

7. CURRENT TRANSFORMER


Current transformer is an
instrument transformer used
to protection & metering of
high values of current.
C.T. is used to step down
current for measurement ,
control & protection.

8. POTENTIAL TRANSFORMER


Potential transformer are instrument transformer.
P.T. is used to step down voltage for measurement, control &
protection.

9. ISOLATOR


It isolates the devices from live line. When there is a
maintenance. It operates when there is no laod.
It is also used to change bus bar line from main to reverse or
vice-versa.

10. CIRCUIT BREAKER

•
•
A circuit breaker is an automatically or manually operated electrical switch designed
to protect an electrical circuit from demage caused by overhead or short circuit.
Type of Circuit Breaker which is used in 132 KV GSS Barmer
SF6 Circuit Breaker
Vacuum Circuit Breaker

11. PROTECTIVE RELAYS


Protective relay is a sensing
device & it is designed to
detect operating conditions
on an electric circuit.
It trips the circuit breaker
when fault is detected.

12. INSULATORS
In order to avoid current leakage
to the Earth, through the
supporting structure provide
to the conductor of overhead
transmission lines, insulators
are used.

13. CAPACITOR BANK
Capacitor banks are used to
improve the quality of the
electrical supply and the
efficient operation of the
power system. Studies show
that a flat voltage profile on
the system can significantly
reduce line losses.

14. BATTERY ROOM & CONTROL ROOM
In a GSS separate dc supply
is maintained for signaling
remote position control,
alarm circuit etc.