1.
A
Summer Training
Presentation
on
“Operation and maintenance of EHV equipment and
Transmission system”
2013-2014
Rajdhani Engineering College Jaipur
Department of ‘Electrical Engineering
Presented by:Vikas Jangir
Electrical Engineering

2.
Introduction of a substation
 Intermediate link between
Generating station & Consumers
 Important part of T&D
 Step down high voltages
Sanganer GSS Capacity : 220 kV,132kV,33 kV

3.
220 kv GSS Sanganer
• History of GSS.
1.
2
3
4
5
Established in 1981
1981 – Heerapura 132kV was there
1998 – KTPS 220kv was added
2002 – Heerapura-I 220kv was added
2005 – Heerapura-II 220kv added
• Incoming feeders.
1 Heerapura I – 220kV
2 KTPS – 220kV
3 Heerapura II -220kV

4.
Outgoing feeders
•
132kv lines
1. Mansarovar I
2. Mansarovar –II
3. Balawala
4. Niwai
5. Sitapura
6. chaksu
• 33kv lines
• 11kv lines
1.
2.
3.
4.
5.
6.
7.
8.
1.
2.
3.
4.
Muhana Mandi
Malpura
Vatika
Phagi
Sitapura
Sanganer
Durgapura-I
Durgapura-II
Tejawala
Industrial
Pream Nagar
Muhana

5.
Single line diagram

6.
GSS

7.
Classification of substation.
• Basis of Nature of Duties
1.
Step-Up or primary Substations
2. Primary Grid Substations
3. Step-Down or Distribution Substations
• Basis of Service Rendered
1. Transformer Substations
2. Switching Substations
3. Converting Substations
•
Basis of Importance
1.
Grid Substations
2.
Town Substations

8.
Classification on the Basis of Operating Voltage
1. High Voltage Substations
2. Extra High Voltage Substations
3. Ultra High Voltage Substations
Classification on the Basis of Design
1. Indoor Type Substations
2. Outdoor Type Substations

9.
Equipment For Substation
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Lightning Arresters
Main Bus-Bars
Wave Trap
Switchgear
Power Transformer
Instruments Transformers
Capacitor voltage transformer
Isolators
Circuit Breakers
Insulators
Fuses
Protective Relays
Station Insulators
Batteries

10.
Lightning arrester
• Protective device
• Equipment use power poles and towers, power
transformers, circuit breakers, bus structures, and steel
superstructures in substations

11.
Wave trapper
• Trap signals and send it to PLCC control Room
• For information purpose

12.
Bus-bars
• Carry electrical supply
• Maximum load

13.
Switchgears
• Controlling equipment
• Protecting equipment
1. Equipment
• Air break Switches, Oil Switches,Isolators,Circuit breaker
• Earthing Switch

14.
•Air switch breaker
• Isolators

15.
Circuit breakers
• Used to Close or open
electrical circuit
• -It cab be operated manually
or automatically
Classification of C.B
1. Water circuit breaker
2. Air circuit breaker
3. Air blast circuit breaker
4. Sulphur-hexa-fluoride circuit
breaker
5. Vacuum circuit breaker

16.
Power transformer

17.
Types of Transformer
•
•
•
•
•
Power transformer
Current transformer
Potential transformer
Capacitance voltage transformer
Distribution transformer
faults in transformer
• Internal faults
• External faults

18.
Current transformer
• Measurement of electric
currents and protective relays
 Potential transformer
• Reduced high voltage in
a fixed voltage and
measurements purpose
also

19.
Faults in transformer
External faults
Internal faults
• Must be disconnected
• Not allowed to operate for
long time
• Failure of coolant
• Short circuit in windings
• Fire inside transformer
• Over heating
Protection
Protection
• Buchholz protection
• Overheating protection
• Cooling fans
• Fire protection system
• Protection against
magnetizing inrush current

20.
Cooling in transformer

21.
Fire protection system
• N2O2
• Nitrogen injection, when control panel receive indication

22.
Substation earthing
• Every instrument earthed
• Lighting arresters

23.
Control room
Protection

24.
Battery Room
• Very crucial section of GSS as batteries provide power
back up and also DC power for DC signaling of control
equipments and fire protection system