Introduction to scada systems & power control centres
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Introduction to scada systems & power control centres

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Introduction to scada systems & power control centres Introduction to scada systems & power control centres Presentation Transcript

  • EDM NATIONAL & REGIONAL CONTROL CENTERS FEASIBILITY STUDY Introduction to SCADA systemsIntroduction to SCADA systems and Power Control Centresand Power Control Centres
  • EDM NATIONAL & REGIONAL CONTROL CENTERS FEASIBILITY STUDY A dAgenda  Definitions  Objectives & main features of SCADA systems  Different generations of SCADA systems  Components of Power Control Centres Components of Power Control Centres  Major requirements of Power Control Centres  Standardisation process
  • EDM NATIONAL & REGIONAL CONTROL CENTERS FEASIBILITY STUDY S i C t l A d D t A i iti (SCADA)Supervisory Control And Data Acquisition (SCADA)  Set of computerized systems communicating through ap y g g telecommunication network that allow operators from a central location to remotely monitor and control plant iequipment  Allows monitoring and control of geographically dispersedg g g p y p assets from a central location  Extensively used in electricity power grids but also in gas and Extensively used in electricity power grids but also in gas and oil industry, water utilities, railway transportation systems, buildings and factory automationg y
  • EDM NATIONAL & REGIONAL CONTROL CENTERS FEASIBILITY STUDY Monitor  Critical operational data  Events  Alarms  … Control  Generator set points  Switching devices  Device automation  … Control Centre / Master station Power stations and Substations / Remote stations Telecommunication systems  Fiber optic  Power line carrier  Microwave  Radio Leased line  …
  • EDM NATIONAL & REGIONAL CONTROL CENTERS FEASIBILITY STUDY  Power control centre S i t l d d t i iti (SCADA)– Supervisory control and data acquisition (SCADA) – Balance generation and demand – Monitor flows and observe system limits – Coordinate maintenance activities – Emergency response functions – Advanced Generation / Transmission (EMS) / Distribution (DMS)( ) ( ) applications  Power stations and substations – Feedback controls (governors, voltage regulators, …) – Protection (protective relays, circuit breakers, …)  K P i i i Key Priorities – Safety – Protect equipment from damageq p g – Reliability – Economics
  • EDM NATIONAL & REGIONAL CONTROL CENTERS FEASIBILITY STUDY  Main features of SCADA systems for power gridy p g ‒ Covers wide geographical area ‒ Predominantly open-loop control ‒ Operators play central role Event driven‒ Event driven ‒ Designed for secure data and control communication ‒ No loss of data ‒ Operators continuously aware of data quality
  • EDM NATIONAL & REGIONAL CONTROL CENTERS FEASIBILITY STUDY  Early generation of SCADA systemsy g y ‒ Facilitate central control and monitoring ‒ Hardwired system ‒ Mimic panel with switches and gauges
  • EDM NATIONAL & REGIONAL CONTROL CENTERS FEASIBILITY STUDY  First generation of computer base SCADA systemsg p y ‒ Modern SCADA systems came with introduction of computers ‒ Based on stand-alone mainframe computers ‒ Computers and software purpose-built by SCADA vendors SCADA slow and noisy communication network‒ SCADA slow and noisy communication network ‒ Proprietary protocols but efficient and reliable communication ‒ Remote station equipment with small I/O density.q p y ‒ Single vendor
  • EDM NATIONAL & REGIONAL CONTROL CENTERS FEASIBILITY STUDY  Local Area Network based SCADA systemsy ‒ Technological advances  Local Area Network (LAN) Miniaturization of electronic components and devices  Computer to computer communication Computer to computer communication ‒ Mini computers ‒ Distributed processing over LANp g ‒ Redundancy and increased reliability ‒ “Open” systems by using third-party hardware and software l i l i i l‒ Multiple communication protocols ‒ Sharing of information with other information systems
  • EDM NATIONAL & REGIONAL CONTROL CENTERS FEASIBILITY STUDY  Wide Area Network based SCADA systemsy ‒ Takes advantage of further advances in computer and communications technology ‒ Adoption of international standards Distribution of SCADA functionality across WAN‒ Distribution of SCADA functionality across WAN – More flexible architecture – Cost effective Redundancyy – Greater operational flexibility ‒ Sharing of information with various information systems
  • EDM NATIONAL & REGIONAL CONTROL CENTERS FEASIBILITY STUDY  Control centre / Master station ‒ Located centrally at the Control Center ‒ Network of computer subsystems with various functions to support the operation of the SCADA based control centersupport the operation of the SCADA based control center ‒ 3 main functional subsystems:y • Front end subsystem i & b k / db b• Main & backup / Hot standby subsystem • Human Machine Interface (HMI) subsystem
  • EDM NATIONAL & REGIONAL CONTROL CENTERS FEASIBILITY STUDY  Front end subsystemy ‒ Manages communication with the remote stations ‒ Responsible for the transmission and reception of raw data to/from the remote stationsto/from the remote stations ‒ Receives data from remote stations, pre-process them and, p p send to main computer subsystem i l f i b d‒ Receives control requests from main computer subsystem and sends to the remote stations
  • EDM NATIONAL & REGIONAL CONTROL CENTERS FEASIBILITY STUDY  Main & backup / Hot standby subsystemp y y ‒ Contains main SCADA applications & databases ‒ Database holds information of all points ‒ Processes control commands received from MMI, packages it and sends to front end subsystemy ‒ Process data received from front end subsystem and sends to bHMI subsystem
  • EDM NATIONAL & REGIONAL CONTROL CENTERS FEASIBILITY STUDY  Human Machine Interface (HMI) subsystem( ) y ‒ Allows operators to interface with SCADA system ‒ Processes operator commands and send to main & backup / hot standby subsystemhot standby subsystem ‒ Receives information from main & backup / hot standbyp y subsystem and presents it to operators visually on video display units, display walls and printers ‒ Receives alarms and alerts operators visually and in audible wayway
  • EDM NATIONAL & REGIONAL CONTROL CENTERS FEASIBILITY STUDY  Major Power Control Centre requirements Major Power Control Centre requirements ‒ Monitoring of power system real time information C i l li bl d i li d i f i• Correct, timely, reliable and time-aligned information • Available to enterprise-wide business operations • Customized and tailored to each business unit needs ‒ Control operations • Fast and reliable remote control actions • Coordinate actions over geographical dispersed and large areas • Coordinate autonomous staff in decentralized and distributed environment S t‒ Systems • Flexible • Scalable • Interoperable • Maintainable
  • EDM NATIONAL & REGIONAL CONTROL CENTERS FEASIBILITY STUDY  Data processing system major components of a Power Controlp g y j p Centre S t hit t‒ System architecture ‒ Basic software system ‒ SCADA functions ‒ EMS functions ‒ DMS functions I t f ith t IT t‒ Interfaces with corporate IT systems ‒ Interfaces with systems of external entities
  • EDM NATIONAL & REGIONAL CONTROL CENTERS FEASIBILITY STUDY  Standardisation process International standards (IEC, ISO) National standards (AFNOR, DIN, ANSI, …) Industry standards (Formalized practice)Industry standards (Formalized practice) Industry practice (Informal practice) Proprietary systems (Vendor specific)