ultimate final scada presentation

5/21/2018 Ultimate Final SCADA Presentation

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Development & Implementation of a

SCADA System for Load Control of the

Power System Simulator (PSS)

Ahmed Fayez 199905252

Mohammed Adnan 199901444

Khalid Yousif 199900237

Salman Al katheeri 199900317


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Presentation Layout

SCADA Introduction

SCADA Hardware

RTU

PSS

Wiring SCADA Software

ISaGraF

Citect

DNP

Future Work Demonstration


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Introduction


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Introduction (What Is SCADA?)

Stands for supervisory control And data

acquisition.

SCADA systems are used in industrial

processes: steel making, power generation(conventional and nuclear) and distribution.

There Are 4 Components In the SCADA

System.


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SCADA Components

Field Instrumentation.

Sensors, devices to control.

Remote Terminal Units.

RTU Vs. PLC Communications Network.

Equipment needed to transfer data to and from different sites

Central Monitoring Station

Collecting information gathered by the remote stations togenerate the necessary action


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Disadvantages Of Relay Systems

Relays used only for on/off control. Complicated control systems

Expensive System.

System takes up much floor and space.

Control relays are power- hungry,heat

generation.

Any change in control program requires the

rewiring of relays.

For complicated control systems, it is difficult to

troubleshoot and locate the faults.


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Advantages Of SCADA systems

Easily programmed or reprogrammed

Easy maintained (self diagnostic).

Capability to do arithmetic function.

The ability to communicate with othercontroller or a master host computer.

PLCs. were able to move past simple on/off

control to more complex schemes as PIDcontrol.


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Applications Of SCADA

Almost every business in the manufacturing

sector and many in the service sector

Aerospace

Bottling and Canning

Chemicals Plants

Petroleum, Petrochemical


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Remote Terminal Unit (RTU)


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PDS eNET OVERVIEW

DIGITAL / ANALOG INPUTS

32 x Digital Inputs

9-28V DC Operation range

LED Indication (Disable Option)

Optically Isolated (1500V peak)

12 x Analog Inputs0-5V,1-5V,0-10V,0-20mA, 4-20mA

(selectable per channel)

Surge Protection


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4 x Analog Outputs

Internal / External power supply Source

0-20mA, 4-20mA

(Voltage output with external resistor)

Short circuit protected

NET OVERVIEWeRTU PDS

DIGITAL / ANALOG OUTPUTS


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RTU Scan Time


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Power System Simulator


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Power System Simulator ( PSS):

The objective of the PSS is to

simulate a real power system.

Power system should be divide

in to three sections , the

generator station, transmission

line and load ( distribution

section ).


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PSS Parts

1- Generator Stations:

The generator station contains two internal generators and athird external generator.

Separately excited synchronous generator is the type of the

machine which used in PSS. The DC motor in PSS is used as prime mover.

The DC motor in PSS is Shunt DC motor type.


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2- Transmission lines: It is represented by wires that are different in shape and

size.

The size and shape is depended on the level voltages and

the load.


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3- The loads:

As in the real power system, the PSS has three type of load:

Residential.

Commercial .

Industrial.

The difference between these come from values of :

- Load.

- Power consumption.

- Power factor for each type. Also the difference rises in the

peak load timing for each type.


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Sensors

In the industry field is now using computers to control and

motions and sequences of machines.

PLC cannot see, hear, feel or tester processes by themselves

but use industrial sensors to give industrial controllers these

capabilities. In our project the Sensors are used as feedback to PLC from

PSS to enhance the system performance.


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Sensors

There were different types of sensor that will be used like Voltage

sensor, current sensor, frequency sensor and power sensor.

Current sensor have rating of 0 5 A.

Voltage sensor has a rating of 0 - 150 V. Frequency sensor, it has a rating of 0 -100Hz.

Power sensor, it has rating of 0- 5 A and 0 150 v.

The outputs from all sensors which going to RTU were 4 20 mA. It is

used this rating to sense any problem in system .


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Wiring


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Wiring

Auxiliary Switch

Output Port Input Port

Relay1(External)

Common

12V

0V

Internal Relay

0V

Common

Transistor

Switch

12V

R1

220V Start


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0 V

From RTU Power

Supply

12 V+

0

0

+

COM 1 2 3 4 5 Com 1 2 3 4

220 V

T.BControl Circuit

A

B

C

Coil 1

Ax 1

A

B

C

Coil 2

Ax 2

ON

NOff

3Phase Motor

M

COM IN 1 IN 2 IN 3 IN 4 IN 5

RTU 12 V


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ISaGRAF


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ISaGRAF


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The Citect Interface


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The DNP


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The DNP


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Future Plans


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Future Plans

Stand by generator.

Adding generator 2 to the system.

Power factor correction.

Load scheduling.

Improving the previous SCADA program.


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Stand by generator

The whole system will be supplied by the main

supplying unit.

A simulated fault will be applied on the system.

During that generator 1 will be on a stand by mode. When the fault occur the main supplying unit will be

disconnected from the loads by using circuit breakers

and generator 1 will be supplying the whole system

instead. All of this process will be done Automatically by the

program.


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Adding generator 2

Generator 2 will be connected to the system using frequency and

current sensors.

Generator 2 will be also controlled by the program which will be

installed on the RTU.

Generator 2 will be as a back up if generator 1 didnt workproperly.


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Back Up generator


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Power factor correction

Capacitor banks are used to correct the power factor..

The value of the capacitance will depend on the value

of the load.

Capacitor banks will inject reactive power into the

system.

The reactive power will decrease the current in thecircuitreduce the losses in the transmission lines.


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Load Scheduling

There are two types of loads: Resistive load and active load.

1. The resistive load are two types:

Critical: supplying vital instruments &machines .

Non-critical: Ex: lighting gardens.

2. The active load: Simulated By a resistor and inductance in series.


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Load Scheduling

When the system suffers from overload on the

generator the program disconnect the non-critical

loads immediately.

Thus in the program all of the loads will be identifiedso that the program can do this process

Automatically.


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Improving the SCADA program

Some blocks will be added to increase the speed

of analyses process. This process will be applied

on the LADDER program.

The Graphical Interface will be enhanced. Thisprocess will be applied on Citect.


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Thanks for Listening

Now, well make a demo for our

work..

ultimate final scada presentation

Documents

advantages of scada

real power system

control relays

control program

onoff control

supervisory control

power generationconventional

power hungry