SUMMER PRACTICAL TRAINING REPORTAT

400kV GRID SUB-STATION(HEERAPURA, JAIPUR)

SUBMITTED TO:-DEPARTMENT OF ELECTRICAL ENGINEERINGJECRC, JAIPUR

SUBMITTED BY:-PUNEET MANGHANI13EJCEE080BATCH: B-1

400kV GRID SUB-STATIONSESSION 2016

ABOUT 400kV GSS

EASTABLISHED: 19 July 2000 by Govt. of Raj.

CAPACITY: 250 MVA

INTRODUCTION

Electric power is generated, transmitted and distributed in the form of AC. The electric power produced at the power station is delivered to the consumers through a large network of transmission and distribution.

SUBSTATION

Main tasks of sub-station

Fault analysis Voltage control Controlling the exchange of energy Protection of transmission system Reliable supply

ABSTRACT

400 kV INCOMING FEEDERS BASSI- 1 BASSI- 2 MERTA HINDOUN CITY 200 kV OUTGOING FEEDERS SANGANER SEZ PHULERA KTPS

CONTENTS Bus bars Isolators Insulators Circuit breakers Power transformers Control room Potential and current transformers Relays Lightning arrestors Battery room

BUS BARS• An electrical

conductor that makes a common connection between several circuits

Single main transfer scheme

Single bus bar scheme

Double main bus bar scheme

ISOLATORS

• Isolators is a mechanical switch which isolates a part of circuit from system when required.

• Types: i)Double break isolators ii)Single break isolators iii)Pantograph type isolators

INSULATORS• It provides insulation between the conductors

and support and thus prevent any leakage current from conductor to earth.

• Purpose: i)Support ii)Break the current

• Types: i)Pin type insulators ii)Suspension type insulators iii)Strain type insulators

CIRCUIT BREAKER

The main function of circuit breaker: i) It carries current continuously

without heatingii) Opens or close the circuit

when required.iii)It protects the circuit in case

of any fault.

Types of circuit breaker:

Vacuum circuit breaker SF6 circuit breaker Oil circuit breaker Air circuit breaker

Difference between Isolator and Circuit Breaker Isolator is an off-load device while circuit

breaker is an on- load device. Isolator is a switch which is operated manually,

separates the circuit from the power main and discharges the trapped charges in the circuit.

Circuit breaker operates automatically, triggered by electromechanical mechanism inside and are a safety feature for abnormal and voltage in the circuit

POWER TRANSFORMER Transformers are used to transform voltage from one circuit to

another without changing the frequency.

Types of power transformer:

Step up transformer and step down transformer

Single phase transformer and three phase transformer

Electrical power transformer, distribution transformer an instrument transformer

Two winding transformer and auto transformer Outdoor transformer and indoor transformer

LIGHTNING ARRESTER A lightning arrester is a device used on electrical power

systems and telecommunications systems to protect the insulation and conductors of the system from the damaging effects of lightning. The typical lightning arrester has a high-voltage terminal and a ground terminal.

RELAYS

A relay is an electrically operated switch which senses abnormal conditions of electrical circuit and closes its contacts. Many relays use an electromagnet to mechanically operate a switch

CONTROL ROOM

BATTERY ROOMA battery room is a room in a facility used to house batteries for backup or uninterruptible power systems.

CONCLUSION

During my two months summer training I got the knowledge about transmission and distribution of the electrical power, about the equipment used, their arrangement and their working.

THANK YOU