132 Kv S/S

1. UTTAR PRADESH POWER
TRANSMISSION
CORPORATION LIMITED
(132KV Sub Station Dasna )
VIKAS RAGHUVANSHI
(1402721916)
EN-4th year

3. CONTENT
 Description of 132KV substation DASNA
 Single line diagram of UPPCL, DASNA
(132KV)
 Main equipment at DASNA substation
132KV
 Lightning Arrester
 Capacitor Voltage transformer
 Isolator
 Circuit breaker
 Transformers
 Some important components
 References

4. DISCRIPTION OF 132KV
SUBSTATION DASNA
 The 132KVpower substation has the
capacity of (2*40 MVA+ 1*20MVA).
 It receives two 132 KV lines from
Muradnagar (circuit 1) and Gulaothi
(circuit2).
 It step down this supply to 33KV . It
gives supply to Coca cola, Mother
Dairy, Rama Hospital and other
feeder.

5.  Capacitor bank is connected to main
bus of 33KV. It is provided to improve
power factor & voltage profile.
Capacitor Bank comprises of two units
of 10 MVAR making total capacity of
20 MVAR.
 Power Bank:- 54 cell is series
connected. Each cell 2V.,300AH total
capacity=108V.

6. 132kV Substation
 It is devided into two(2) parts:-
A. Panel Section
A. Control Panel Section
B. Relay and Protection Panel Section
B. Switch Yard
A. 132kV section
B. 33kV section
C. Battery Room (Extra)

7. A. Panel Section
 It is a room which contains all types of
panels.
 It has two sections:-
 Control Panel Section
It contain panels related to controlling of
instruments. E.g.:- feeder panel, Apex panel,
etc.
 Relay And Protection Panel Section
It contains panels related to relay systems and
protection systems. E.g.:- Relay panel, line
protection panel, etc.

8. B. Switch Yard
 It is the field where components used in
controlling supply and measuring
supply(incoming and outgoing) are
placed.
 Some of these many components are:-
 C.Bs
 Isolators
 C.Ts
 P.Ts
 L.As etc.

9. MAIN EQUIPMENT AT
DASNA SUBSTATION 132KV

10. SINGLE LINE DIAGRAM

11. The line moves ahead passing through
insulators & to the circuit breakers (CB)
moving ahead to the main bus bar
line moves through Capacitive
Voltage Transformer (CVT) &
Current Transformer (CT)Capacitive
Voltage
Transformer
(CVT)
Current
Transformer
(CT)
132KV SF6 CB

12. LIGHTNING ARRESTERS

13.  A lightning arrester is a device used on
electrical power system to protect the
insulation and conductor of the system from
the damping effect of lightning.
 The lightning arresters has a high voltage
terminal and a ground terminal.
 When a lightning surge travels along the
power line to the arrester, the current from
the surge is diverted through the arrester, in
most cases to earth.

14. CAPACITOR VOLTAGE
TRANSFORMER
 A capacitor voltage transformer(CVT) or
capacitance coupled voltage
transformer(CCVT) is a transformer used in
power system to step down extra high voltage
signals and provide a low voltage signal, for
measurement or to operate a protective relay.
 In its most basic form the device consists of
three parts– two capacitors across which the
transmission line signals is splits, and one
inductive element to tune the device to the line
frequency, and a transformer to isolate and
further step down the voltage for the
instrumentation or protective relay.

15. ISOLATER
 In electrical engineering, a
disconnector, disconnect switch or
isolator switch is used to ensure that
an electrical circuit is completely de-
energized for service or maintenance.

17. STEPS OF OPERATION OF
ISOLATOR
 SEQUENCE OF STEPS FOR
ATTENDING MAINTAINANCE—
1. Open CB on no load or full load
2. Open the isolator on no load
3. Close the earth switch
EQUENCE OF STEPS FOR KEPT IN
SERVICE—
1. Open the earth switch
2. Close the isolator
3. Close the CB

18. CIRCUIT BREAKER
 A CB is an automatically operated electrical
switch designed to protect an electrical
circuit from damage caused by overcurrent or
overload or short circuit.
 Its basic function is to interrupt current flow
after protective relays detect a fault. Unlike a
fuse, which operates once and then must be
replaced, a circuit breaker can be reset (either
manually or automatically) to resume normal
operation.
 Whenever a fault occur trip coil gets energised,
the moving contact are pulled by some
mechanism and therefore the circuit is opened.

19. TYPES OF CB

20. TRANSFORMERS
POWER TRANSFORMERS
Transformer is a static machine, which
transforms the potential of alternating
current at same frequency.
It means the transformer transforms
the low voltage into high voltage and
vice versa.
It works on the principle of mutual
inductance.
When the energy is transformed to a
higher voltage ,the transformer is called
step up and if energy transformed to a
lower volt, the transformer is called step
down.

21. TWO 10MVAR CAPACITOR BANKS(20 MVAR) FOR POWER
FACTOR CORRECTION & VOLTAGE STABILITY FOR
DISTRIBUTION
Capacitor
Cells

22. SOME IMPORTANT
COMPONENTS
 EARTH SWITCH:- it is a switch normally
kept open and connected b/w earth and
conductor. If the switch is closed ,it
discharges the electric charge to ground,
available on the uncharged line.
 BUS –BAR:-when number of lines
operating at the same voltage levels
needs to be connected electrically, bus
bars are used.Bus bars are conductors
made of copper or alluminium, with very
low impedance and high current carrying
capacity.

23.  CURRENT TRANSFORMER(CT):-the lines in
the substations carry currents in the order of
thousands of amperes.The measuring
instruments are designed for low value of
currents. CT are connected in lines to supply
measuring instruments and protective relays.
 INSULATORS:- they supports the
conductor(bus bar) and confine the current to
the conductor. The most commonly used
material for manufactures of insulators is
porcelain. There are several type of insulator
(i.e. pin type, suspension type, strain type etc.)
and there used in substation will depend upon
the service requirement.

24.  POTENTIAL TRANSFORMERS(PTs):-
The lines in the substations operate at
high voltage. The measuring
instruments are designed for low
voltages. PTs are connected in lines to
supply measuring instruments and
protective relays. These transformers
make the low voltage instruments
suitable for measurement of high
voltages.

25. Important Terms
 Tripping – Power goes due to over load . It is
for the protection of components.
 Shut down – Power is cut due to
maintenance in progress. It is done
manually.
 Break down – Power goes due to any fault in
the line. When fault is removed , power is
back.
 Rosting – Power is cut deliberately on order
of higher authority due to shortage of
power.

26. REFERENCE
 Ministry of Power, Govt. of India.
 www.wikepedia.com
 http://upptcl.org/index.htm
 www.home-energy-metering.com
 www.nic.in.

27. THANKS