MONITORING AND CONTROLING OF SUBSTATION USING SCADA

MONITORING AND CONTROLING OF SUBSTATION USING SCADA

INTERNAL GUIDEMr.RavindraDBIT,Banglore-74

EXTERNAL GUIDEMr.Varaprasad Rao.ANAL,Banglore-17

Presentation By:Santosh.K (1DB09EE404)

Sanketh.M.S (1DB08EE034)Siddalingesh.G.A (1DB09EE406)

Channabasavaiah.M.S (1DB09EE400)

INTRODUCTON:

Early electrical substations required manual switching or adjustment of equipment, and manual collection of data for load, energy consumption, and abnormal events. As the complexity of distribution networks grew, it became economically high.

To overcome the above difficulties we using supervisory control and data acquisition (SCADA) for automatic monitoring and controlling of substation.

SCADA usually refers to centralized system which monitor and control entire substation. Control actions are performed automatically by PLC(programmable logic controller). While the SCADA system monitors overall performance. Using SCADA in substation detection of fault is fast, accurate in operation, compactness, simplicity in circuit.

A:Primary power lines' side B:Secondary power lines' side

1.Primary power lines 2.Ground wire 3.Overhead lines 4.Transformer for measurement of electric voltage 5.Disconnect switch 6.Circuit breaker 7.Current transformer 8.Lightning arrester 9.Main transformer 10.Control building 11.Security fence 12.Secondary power lines

SCHEMATIC DIAGRAM OF ELECTRICAL DISTRIBUTION SUBSTATION

BLOCK DIAGRAM

SCADA

MODBUS serial link

CONVERTER CONVERTER PLC

Control devices Data storage

ETHERNET

Advantages of PLCs

• Less wiring.• Wiring between devices and relay contacts are done in the PLC

program.• Easier and faster to make changes.• Trouble shooting aids make programming easier and reduce

downtime.• Reliable components make these likely to operate for years

before failure.

•- Developed to replace relays in the late 1960s

•- Costs dropped and became popular by 1980s

•- Now used in many industrial designs

PLC Origin

7

Major Components of a Common PLC

PROCESSOR

POWERSUPPLY

I MN O P D U UT L E

O M U OT DP UU LT E

PROGRAMMING DEVICE

From SENSORS

Pushbuttons,contacts,

limit switches,etc.

ToOUTPUT

Solenoids, contactors,

alarmsetc.

8

PLC

INPUTS

OUTPUTS

MOTOR

LAMPCONTACTOR

PUSHBUTTONS

CONTROL CIRCUIT FOR CONTACTOR

10

N.O

C

L2 L1

L1 L2

OUTPUT MODULEWIRING

MOTOR

CONTACTOR

O:4

0CONTACTOR

LADDER PROGRAM

L1 L2

FIELD WIRING

•SOLENOID•VALVES•LAMP•BUZZER

APPLICATIONS: •Circuit breakers and Isolators •Transformer cooling•Multiple fault detection•Switching operation•Measurement and data storage

ADVANTAGES•System is more efficient and reliable•Higher accuracy can be achieved•It reduces time delay•Monitoring and storage of data•Replacing human operators in tasks thatinvolve hard physical or dangerous work

Microprocessor based multi-functional numerical relays provide reliable solution to complex protection functions with increased Mean Time Between Failure (MTBF). These relays play a significant role in automation, protection and control of transmission equipment in substation. Numerical relays have limited control applications. Therefore, in order to operate these relays remotely, a SCADA system using MODBUS communication has been designed and developed. Numerous numbers of relays have been installed at a fully loaded substation. Different performance parameters are evaluated and circuit breaker operations have been Monitored.

CONCLUSION

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