application&case studies of scada

8/7/2019 Application&Case Studies of SCADA

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Applications and Case Studies 2-1

ApplicationsApplications

and Case Studiesand Case Studies

Department of Engineering Physics

Institut Teknologi Bandung

November2000


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General Functions of SCADAGeneral Functions of SCADA

SystemSystem To reduce power cost.

To reduce staffing.

To reduce future capital requirements.

To improve level of service

To avoid environmental incidents.

To comply with the regulator requirements.

It may not be possible to run the business without

SCADA.

To obtain a competitive edge.

To replace an existing aging system.


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SCADA Performance IndicatorsSCADA Performance Indicators

Immediate alarm of lost production.

Problem localization to minimize time to repair.

Remote alarm to avoid equipment damage and lost

production.

Automatic shutdown on detection of serious problem.

Identification of field operational problems.

Optimization of production.


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SCADA & Corporate IT IntegrationSCADA & Corporate IT Integration


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Changing Attitudes to SuccessfulChanging Attitudes to Successful

Oil/Gas Field AutomationOil/Gas Field Automation

Acceptance of automation by field operations

personnel is essential to its success!

Remotely monitors the performance of oil/gas wells. Making it possible to remotely control the flow of

oil/gas at each well.

Substantially reduces the number of necessary

operator visits to the well sites. Changes the operator roles.

Safety and protection of the personnel & environment

are improved.


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Oil/Gas Field AutomationOil/Gas Field Automation

Improving the flow balance for the field.

Automating well-test procedure increases production limits.

Production control suitable for the spot market.

Consistent oil/gas delivery.

Field operators are responsible for50%

more sites. Saves operators from unnecessary travel to sites.

Reducing their costs for road clearing and maintenance.

Increases billing accuracy and reduces the billing cycle.

Enable to analyze well performance for maintenance scheduling

and for resource reserve analysis.


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Application Areas of SCADAApplication Areas of SCADA

SystemSystem

Well-head control, custody transfer, automatic well-

testing.

Production monitoring and control, gatheringfacilities, enhanced oil recovery.

Tank farm/terminals tanker loading/unloading,

fire/gas protection, alarms/shutdown/interlocking, etc.

Pipeline pump or compressor control, surge control,alarm and shutdown protection, metering, etc.


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Gas Lift System RelatedGas Lift System Related

InformationInformationOil volumes produced

Oil volumes inventory

Gas compressor statusAlarm summary (active)

Analog data summary

Well head status, pressure, oil/gas flow rate


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Sucker Rod Pump DataSucker Rod Pump Data

AcquisitionAcquisitionAlarm Pump on/off

Power failure

RTU batteryvoltage low

Well-head pressure

Vibration

Analog Signal

Rod load

Motor current

Well-head pressure

Beam-position

Vibration level


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WellWell--head Monitoring and Controlhead Monitoring and Control

Well-head pressure.

Well-head temperature.

Well-head valve position.

Well throttling control.

Hydraulic Emergency Shut Down System.

Remote stop control.


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1.Inlet gas lift pressure

2.Gas lift injection differential pressure

3.Casinghead pressure

4.Casinghead temperature

5.Tubing-head pressure

6.Tubing-head Temperature

7.Nozzle outlet differential pressure

8.Well outlet discharge pressure.

Process Variables forWellProcess Variables forWell--HeadHead

ManagementManagement


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Leak Detection of Liquid PipelineLeak Detection of Liquid Pipeline

Rate of change of pressure.

Rate of change of flow.

Static volume balance.

Transient modeling system.

Visual (Line walking, aerial surveillance, etc.)


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Leak Detection ofGas PipelineLeak Detection ofGas Pipeline

Pressure drop detectors at block valves.

Rate of change of pressure at block valves.

Mass/volume balance.

Transient modeling system.

Acoustic.

Portable gas detectors, buried detector.


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Integration Improvement ofIntegration Improvement of

Flow ComputerFlow Computer SCADA SystemSCADA System

Makes a cost effective larger SCADA System.

Applicable communication protocols: Modbus or

Fieldbus. OPC client/server may be the effective standard

interface.

Expensive, specialized host software packages will

no longer be required to retrieve and display flow

computer data.

Material/energy flow balance can be monitored

easily.


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TANK FARM SYSTEMTANK FARM SYSTEM


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Continuous Protection Against Catastrophic Failure.

Early Detection of Machine Abnormalities.

Accurate Diagnosis of Problem.

Assessment of Level of Severity.

Accurate Prediction of Future Machine Condition

Versus Time (including time to failure).

Generation of Feedback Information for Control ofMachine Operational Characteristics.

EQUIPMENT MONITORINGEQUIPMENT MONITORING

SYSTEMSYSTEMFunctions:

Equipment health monitoring and failure prediction has

been a key technology area for over15 years.


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SAFETY INSTRUMENTEDSAFETY INSTRUMENTED

SYSTEMSSYSTEMSA failure of some part of automation system may

cause injury to:

- member of public

- member of worker- equipment

- environment

All process should be equipped with a safety

instrumented system.


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Design Philosophy of SafetyDesign Philosophy of Safety

SystemsSystemsSHOULD BE ABLE TO OVERRIDE NORMAL

CONTROL SYSTEM.

SHOULD NOT SHARE COMPONENTS WITHNORMAL CONTROLS.

SHOULD BE AS SIMPLE AS POSSIBLE.


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RTU #1RTU #2

S

LS

203

LS

203

LY

202

TU #2

t

i

TU #1

LC

202

Very complex safety system


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S

LS

203

RTU

S

R

I LET

SCRUBBER

I S

SCADA system with local loop override


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FROM RTU

S

PSL

208

S

R

I S

FT

R

SCADA system with local shutdown


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PIPELINE PROTECTION SYSTEMPIPELINE PROTECTION SYSTEM


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Valve with Satellite CommunicationValve with Satellite Communication

Interface for Pipeline Safety SystemInterface for Pipeline Safety System


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Well DetailsWell Details


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Well Production RevenueWell Production Revenue


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INTEGRATED SAFETY SYSTEMINTEGRATED SAFETY SYSTEM


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GAS PLANT SCADA SYSTEMGAS PLANT SCADA SYSTEM


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SCADA System dependent AREASSCADA System dependent AREAS

(Corporate Resource Planning)(Corporate Resource Planning)

Business Environment

Inventory Management

Process Modeling Analysis, Control and Measurements

Planning


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Corporate Resource PlanningCorporate Resource Planning


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Benefits of CRPBenefits of CRP

Increases Availability

Increases Productivity

Proactive Monitoring & Control

Continuous Process Improvement

Business Performance Monitoring & Control


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Future IssuesFuture Issues

Open, non-proprietary systems are expected toprevail for remote monitoring and control.

The software should facilitate communications with

all types of field equipment as well as other computer

systems within the company. A standard communication protocol is required to

support the standard configuration of future

automation system (Fieldbus protocol).

Web browser will be one user interface tools.

Field Office data integration becomes a crucial

need.


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Trends in SCADA and InternetTrends in SCADA and Internet

By 2001, projections show the Internet to have over200 million hosts and 2 billion people interconnected.

More industries are executing more financialtransactions, online banking, and sharing vastamounts of information.

More companies are developing a number ofsoftware that can exploit the interconnectedness ofthe Internet.

MMI allows a user the ability to connect to a SCADA

system from a remote site to control a process. IT managers and system analysts should have a

greater understanding on potential misuses of thiscommunication medium.

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