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Copy of DELHI METRO RAIL COORPORATION
Transcript of Copy of DELHI METRO RAIL COORPORATION
PROJECT REPORT BY
EN 7A (1013321017)
SCADA AT DMRC
HARDWARE OF SCADA
DELHI METRO RAIL CORPORATION
Overview Of SCADA:
SCADA stands for Supervisory Control And Data Acquisition. It generally refers to an industrial
control system: a computer system monitoring and controlling a process
It lets the operator supervise the process interactively with schematic
pictures which illustrate the real process and direct the operator to make correct
The operator can perform control operations-open, close, lower, higher, etc- by
activating function keys, dialogs and windows
Process information is stored on a process database and a report database. The real-time process database stores incoming and outgoing process data signals from the circuit breakers and the transformers. Process communication from and to the base system passes through the process database.
RECEIVES 66KV FROM VARIOUS POWER GENERATING PLANTS
EVERY LINE CAN HAVE 3 TO 4 RSS
THE TRANSFORMERS FURTHER STEPS DOWN VOLTAGE TO
AUXILIARY MAIN SUPPLY
RECEIVES 33KV FROM THE RSS
USES IT FOR AUXILIARY SUB STATIONS FOR POWERING STATIONS AND STATION WORKING
TRACTION MAIN SUPPLY
RECEIVES 25KV FROM RSS
TRACTION SUBSTATION PROVIDES THE POWER FOR THE TRACTION OR THE RUNNING OF THE TRAIN
ASS BOTANICAL GARDEN
RTU pick up data from
various remote locations and send it to OCC for processing of the data.
The RTU consists of cabinets, main CPU, I/O modules, relays and terminal blocks. It collects
data from the power supply equipments such as circuit breaker, transformer, protection relay etc.
and transmits the same through the communication unit to the base system
HARDWARE MODULES FOR RTU
CENTRAL CONTROL UNIT
IT IS A 32 BIT CPU BOARD OF RTU AND ITS ESSENTIAL TASKS ARE
Managing and controlling of the I/O – boards
Reading process events from the input boards.
Writing commands to the output boards.
synchronizing the I/o boards and subsystems.
POWER SUPPLY UNIT
The power supply unit 23NG20 generates the two supply voltages (5V DC and 24 V DC) for the
DIGITAL INPUT MODULE
This card is used to collect the status of the sub-station equipments e.g. close/open status, SF6
gas status, Local/Remote status, Protection relay status etc. The binary input board 23BE21 is
used for the isolated input of up to 16 binary process signals. Allocation of an input to a processing function can be at will within the rules of configuration.
The board has sixteen light emitting diodes to indicate the signal state. The LEDs are organised
in two columns on the front plate. The LED follows directly the input.
DIGITAL OUTPUT MODULE
This card is used to execute close/open command to the circuit breakers, isolators etc. The binary output board 23BA20 can be used for the potentially isolated output of up to 16 binary signals to
ANALOG INPUT MODULE
This card is used to measure analog values such as voltage, current, frequency etc. Generally a
Transducer is provided which takes the input from CT or PT and gives the output to analog input
card in to analog data form
IT HAS THE FOLLOWING FUNCTIONS AND PROPERTIES
Potential isolation between inputs and outputs.
Controlled load balancing
PICTURES- DMRC LABS
INFORMATION - DMRC FILES