SCADA--Supervisory control & data acquisition

3,192 views

Published on

great presentation with diagrams...

Published in: Education, Business, Technology

SCADA--Supervisory control & data acquisition

  1. 1. Introduction toIntroduction to S C A D AS C A D A NIDHIN MANOHARNIDHIN MANOHAR Senior ResearchSenior Research EngineerEngineer
  2. 2. acronym foracronym for Supervisory ControlSupervisory Control AndAnd Data AcquisitionData Acquisition S C A D AS C A D A
  3. 3. Supervisory Control AndSupervisory Control And Data AcquisitionData Acquisition Computer based system that allows operators inComputer based system that allows operators in a central location to continuously monitor anda central location to continuously monitor and remotely control field equipmentremotely control field equipment
  4. 4. Supervisory Control RequirementsSupervisory Control Requirements at plants / networksat plants / networks • Centralized supervisionCentralized supervision • Leak Detection and loss preventionLeak Detection and loss prevention • Safe operationsSafe operations • Several levels of Operations hierarchySeveral levels of Operations hierarchy • Historical registers and real timeHistorical registers and real time informationinformation • Ability to maintain operations even withAbility to maintain operations even with loss of communicationloss of communication • Ease of future upgrade economicallyEase of future upgrade economically
  5. 5. OIL TERMINALOIL TERMINAL
  6. 6. PUMPING STATIONSPUMPING STATIONS
  7. 7. PRESSURE REDUCTIONPRESSURE REDUCTION STATIONSSTATIONS
  8. 8. BLOCK VALVESBLOCK VALVES
  9. 9. MARINE TERMINALMARINE TERMINAL
  10. 10. MAIN PIPELINEMAIN PIPELINE CONTROL CENTRECONTROL CENTRE
  11. 11. EMERGENCYEMERGENCY CONTROL CENTRECONTROL CENTRE
  12. 12. • Unlike DCS, traditionally SCADA isUnlike DCS, traditionally SCADA is not considered a fullnot considered a full ControlControl System,System, but often as systembut often as system focusing onfocusing on Supervisory ControlSupervisory Control and Monitoringand Monitoring.. • However, many new SCADAHowever, many new SCADA implementations include smallerimplementations include smaller DCS units.DCS units. Supervisory Control + . . . .
  13. 13. We may look at SCADA as a softwareWe may look at SCADA as a software that isthat is layeredlayered over the Dataover the Data Acquisition and Interface hardware incl.Acquisition and Interface hardware incl. Programmable Logic ControllersProgrammable Logic Controllers (PLCs), variable-speed drives, or other(PLCs), variable-speed drives, or other commercial hardware modules thatcommercial hardware modules that may be present locally or distributedmay be present locally or distributed geographically apart.geographically apart. . . . . + Data Acquisition
  14. 14. • reads data from PLCs and otherreads data from PLCs and other hardwarehardware • analyze and graphically present dataanalyze and graphically present data to the user.to the user. • reads and writes multiple sources ofreads and writes multiple sources of data, using multiple industrialdata, using multiple industrial protocols.protocols. So lets see what a SCADA is like…So lets see what a SCADA is like… . . . . + Data Acquisition
  15. 15. Benefits?Benefits? • Increased informationIncreased information for better decisionfor better decision makingmaking • Early detectionEarly detection of abnormal systemof abnormal system conditions (take corrective action beforeconditions (take corrective action before massive failure)massive failure) • Improve plant operation and reliabilityImprove plant operation and reliability • Better equipment utilizationBetter equipment utilization (squeeze(squeeze more capacity out of existing equipment)more capacity out of existing equipment) • ImproveImprove productivityproductivity • Reduce lossesReduce losses
  16. 16. Basic Features (Run Time)Basic Features (Run Time) • SC Data Acquisition Including StandardSC Data Acquisition Including Standard DriversDrivers • Alarm HandlingAlarm Handling • Data LoggingData Logging • Data Presentation (Synoptic/Trending)Data Presentation (Synoptic/Trending) • Access ControlAccess Control • RedundancyRedundancy • Network ConnectivityNetwork Connectivity • ReportsReports • Recipe HandlingRecipe Handling
  17. 17. • Master StationMaster Station – A centrally located computer that allowsA centrally located computer that allows personnel to view SCADA data andpersonnel to view SCADA data and initiate remote control actionsinitiate remote control actions • Field EquipmentField Equipment – Equipment in substations and feedersEquipment in substations and feeders for connecting the SCADA system to thefor connecting the SCADA system to the power apparatuspower apparatus • Communication EquipmentCommunication Equipment – Facilities (radios, landlines) that enableFacilities (radios, landlines) that enable the Master station to connect to SCADAthe Master station to connect to SCADA system field componentssystem field components
  18. 18. SCADA Master StationSCADA Master Station • Control centre from which multipleControl centre from which multiple remote installations are controlledremote installations are controlled and monitoredand monitored • Connected to other control centresConnected to other control centres as well.as well. • Interfaces with human throughInterfaces with human through HMI (Human-Machine Interface),HMI (Human-Machine Interface), which may be local or remote.which may be local or remote. • Connected to RTUs and/or IEDsConnected to RTUs and/or IEDs
  19. 19. RTU StationsRTU Stations • Remote Terminal UnitsRemote Terminal Units • Appear as IED to SCADA master whenAppear as IED to SCADA master when DNP used for communicationsDNP used for communications • Each RTU manages multiple actualEach RTU manages multiple actual IEDsIEDs • Attached IEDs referenced usingAttached IEDs referenced using absolute addresses by the SCADAabsolute addresses by the SCADA mastermaster
  20. 20. SCADA CommunicationsSCADA Communications • Client-server / “publish–subscribe”Client-server / “publish–subscribe” methodsmethods • Central servers collect, analyze andCentral servers collect, analyze and present data to displays and to otherpresent data to displays and to other servers.servers. • Live inputs from Remote DataLive inputs from Remote Data Acquisition / Field Terminal UnitsAcquisition / Field Terminal Units • Real-time communication is of utmostReal-time communication is of utmost importance.importance.
  21. 21. Communication ProtocolsCommunication Protocols • DNP3:DNP3: Distributed NetworkDistributed Network ProtocolProtocol based onbased on ISO/IEC 60870-ISO/IEC 60870- 5-1015-101 • FieldbusFieldbus • IEEE 802.11IEEE 802.11 • Wireless communications: CDMA,Wireless communications: CDMA, GSM, etc.GSM, etc.
  22. 22. Use ofUse of MicroSoft MethodologiesMicroSoft Methodologies • APIAPI • DDE, NetDDE,DDE, NetDDE, • COM/DCOM, ActiveXCOM/DCOM, ActiveX • OLE for Process ControlOLE for Process Control • ODBCODBC • ASCII/CSV (Configuration)ASCII/CSV (Configuration) • WebWeb

×