Training from 220kv GSS Sanganer, which is located on Muhana Road, Jaipur

ASummer Training Presentation

on“Operation and maintenance of EHV equipment and

Transmission system”

Presented by:-

Vikas Jangir

Electrical Engineering

2013-2014

Rajdhani Engineering College Jaipur

Department of ‘Electrical Engineering

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

220 kv GSS Sanganer• History of GSS.

1. Established in 19812 1981 – Heerapura 132kV was there3 1998 – KTPS 220kv was added4 2002 – Heerapura-I 220kv was added5 2005 – Heerapura-II 220kv added

• Incoming feeders.

1 Heerapura I – 220kV

2 KTPS – 220kV

3 Heerapura II -220kV

Outgoing feeders• 132kv lines

1. Mansarovar I 2. Mansarovar –II

3. Balawala

4. Niwai

5. Sitapura

6. chaksu

• 33kv lines

1. Muhana Mandi

2. Malpura

3. Vatika

4. Phagi

5. Sitapura

6. Sanganer

7. Durgapura-I

8. Durgapura-II

• 11kv lines

1. Tejawala

2. Industrial

3. Pream Nagar

4. Muhana

Single line diagram

GSS

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 Importance

1. Grid Substations

2. Town Substations

• Basis of Service Rendered

1. Transformer Substations

2. Switching Substations

3. Converting Substations

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

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

Lightning arrester• Protective device• Equipment use power poles and towers, power

transformers, circuit breakers, bus structures, and steel superstructures in substations

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

Bus-bars• Carry electrical supply• Maximum load

Switchgears • Controlling equipment• Protecting equipment

1. Equipment • Air break Switches, Oil Switches,Isolators,Circuit breaker• Earthing Switch

•Air switch breaker • Isolators

Circuit breakers• Used to Close or open

electrical circuit • -It cab be operated manually

or automatically

Classification of C.B1. Water circuit breaker

2. Air circuit breaker

3. Air blast circuit breaker

4. Sulphur-hexa-fluoride circuit breaker

5. Vacuum circuit breaker

Power transformer

Types of Transformer

• Power transformer• Current transformer• Potential transformer• Capacitance voltage transformer• Distribution transformer

faults in transformer• Internal faults• External faults

Current transformer • Reduced high voltage in

a fixed voltage and measurements purpose also

Potential transformer• Measurement of electric

currents and protective relays

Faults in transformerExternal faults• Must be disconnected• Not allowed to operate for

long time• Failure of coolant

Protection• Buchholz protection• Overheating protection • Cooling fans

Internal faults• Short circuit in windings• Fire inside transformer • Over heating

Protection• Fire protection system• Protection against

magnetizing inrush current

Cooling in transformer

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

Substation earthing• Every instrument earthed• Lighting arresters

Control room

Protection

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