Download - 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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Applications and Case Studies 2-2
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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Applications and Case Studies 2-3
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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Applications and Case Studies 2-5
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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Applications and Case Studies 2-6
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.