SUMMER PRACTICAL TRAINING REPORT AT 400 KV GRID SUB-STATION (HEERAPURA.JAIPUR)

SUBMITTED TO:- SUBMITTED BY:-DEPARTMENT OF SURESH KUMAR CHOUDHARYELECTRICAL ENGINEERING 2012UEE1549MNIT,JAIPUR BATCH E-4

400 KV GRID SUB-STATION SESSION-2015

Introduction of venue

ESTABLISHED On 19 july 2000 by govt. Of

raj.

CAPACITY 250MVA

STAFF

IntroductionElectric 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.

So…..

What is a electric sub-station ?

Substation

Main tasks of sub-stations

Protection of transmission system. Controlling the Exchange of Energy. Voltage Control Fault analysis  Reliable supply

ABSTRACT 400kV INCOMING FEEDERS BASSI-I BASSI-II MERTA HINDOUN 220kV OUTGOING FEEDERS SANGANER SEZ PHULERA KTPS

contentsBus barsIsolatorsInsulatorsCircuit breakersPower transformersControl roomPotential and current transformersRelaysLightening arrestersBattery room

Bus bars• An electrical

conductor that makes a common connection between several circuits.

• Single Bus Bar scheme

• Single main transfer scheme

• Double main bus bar scheme

Isolators• Isolator is a mechanical

switch which isolates a part of circuit from system as when required.

1)Double Break Isolator

2)Single Break Isolator

3)Pantograph type Isolator.

InsulatorsIt provide insulation between line conductors and supports and thus prevent any leakage current from conductor to earth.

PURPOSE• SUPPORT• BREAK THE CURRENT

MATERIAL

TYPE OF INSULATOR

1. Pin Insulator2. Suspension Insulator3. Strain Insulator

Circuit breaker

THE MAIN FUNCTION OF CIRCUIT BREAKER

1.It carries current continuously without heating

2.Opens or close the circuit when required.

3.It protects the circuit in case of any fault.

Types of circuit breakers

Vacuum circuit breaker

SF6 circuit breaker

Air circuit breaker

Oil circuit breaker

What is the difference between Isolator and Circuit Breaker?

Isolator is an off-load device while, circuit breaker is an on-load device.

Isolator is a switch operated manually, which separate the circuit from the power main and discharges the trapped charges in the circuit.

Circuit breakers operate automatically, triggered by electromechanical mechanism inside and are a safety feature for abnormal loads and voltages in the circuit.

Power transformers● TRANSFORMERS ARE USED

TO VOLTAGE CONTROL AT CONSTANT FREQUENCY.

MAIN PARTS OF TRANSFORMER

CAPACITY

PROTECTION

Types of power transformers

Step Up Transformer & Step Down Transformer Three Phase Transformer & Single Phase

Transformer Electric Power Transformer, Distribution

Transformer & Instrument Transformer Two Winding Transformer & Auto Transformer Outdoor Transformer & Indoor Transformer

C. T. & P.T. CT

oSTEPING DOWN CURRENT FOR MEASURMENT

PToSTEPING DOWN

VOLTAGE FOR PURPOSE OF PROTECTION

Control room

LIGHTNING ARRESTER

●A DEVICE WHICH PROTECTS EQUIPMENT FROM OVER VOLTAGE IN THE BASIS OF THAT WHICH THEY ARE DESIGNED

Relays

A relay is automatic device which senses an abnormal condition of electrical circuit and closes its contacts.

FUNCTION OF RELAY• Relays are switches that open and close circuits

electromechanically or electronically. Relays control one electrical circuit by opening and closing contacts in another circuit

Battery RoomA battery room is a room in a facility used to house batteries  for backup or uninterruptible power systems

CONCLUSION

During these eight weeks of work there I developed my team work, analytical thinking and various important information about electric power system. The main objective of this whole training program is to provide an opportunity to identify, observe and practice how engineering is applicable in the real industry.

THANK YOU

ANY QUERIES