SCADA EMS.pdf
Transcript of SCADA EMS.pdf
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Blackout 101Dr. B. Don Russell
Texas A&M University
Dr. Bruce Wollenberg
University of Minnesota
Mr. John McDonald
KEMA, Inc.
Dr. Pete Sauer
University of Illinois at Urbana-Champaign
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An Electric Power System Tutorial - Part 2
Monitoring and Control of Power Systems
John McDonald
Sponsored by IEEE PES and IEEE-USA
Friday, February 6, 2004
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Overview
What is a SCADA System?
How are SCADA Systems Used? What is a Substation Integration and Automation
System?
What are the Different Sources of Information?
SCADA Alarm Processing / Filtering Capabilities
System Factory and Site Testing Power System Action Time Frames
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What is a SCADA System?
Supervisory Control and Data Acquisition (SCADA)
Supervisory Control => Remote Control of Field Devices
Data Acquisition => Monitoring of Field Conditions SCADA System Components
Master Station => System “Nerve Center” Located in
Electric Utility Energy Control Center (ECC);Dispatchers Use to Monitor and Control Power System
Field Devices => Needed Wherever There is Data to beSent to Master Station (Substations, Lines or Feeders)
Communications => Links Master Station with FieldDevices; Continuous 24 by 7 Operation
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Dispatcher Console300 MHz RISC Processor
256MB RAM, 9GB HDD,
CD-ROM, (2) 21” CRTs
Redundant SCADA System – Configuration Overview
SCADA Workstation/ServersDispatcher Consoles300 MHz RISC Processor
256MB RAM, (2) 9GB HDD,
CD-ROM, (2) 21” CRTs
Historical Data Server 300 MHz RISC Processor
512MB RAM, (2) 9GB HDD
CD-ROM
Dispatcher Consoles700 MHz Pentium III PC
128MB RAM, 9.1GB HDD
CD-ROM, (2) 21” CRTs
Remote User Stations600 MHz Pentium II PC
64MB RAM, 6GB HDD
CD-ROM, 56k Modem,
13.3” Active Color LCD
PSTN
Remote Access
Router
Laser Printer
10/100 Ethernet
Hubs
RTU Communication
Ports
Diagnostic Modem
LAN
Router
To Corporate
LAN
Port
Servers
Front-End
Processors
ICCP Node700 MHz Pentium III PC128MB RAM, 6.4GB HDD
CD-ROM, 17” CRT
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Electric Utility Energy Control Center (ECC)
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SCADA System
Master Station –
Computer Servers andCommunication
Equipment
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SCADA System Master Station –
Dispatcher Console Equipment
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One-Line (Single-Line) Diagram
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Alarm Summary Display
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Feeder Map Display
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World Coordinate Display Schematic
Diagram
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Electric Utility Substation
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Remote Terminal Unit (RTU)
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SCADA
SCADA/AGC EMS
DA DMS
Supervisory Controland Data Acquisition
SCADA/AutomaticGeneration Control
Energy ManagementSystem
Distribution AutomationSystem
Distribution Management System
How are SCADA Systems Used?
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SCADA System
Primary Functions
Data Acquisition
Remote Control
User Interface
Areas of Responsibility
Historical Data Analysis
Report Writer
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SCADA / AGC System
Primary Functions
Automatic Generation Control (AGC)
Economic Dispatch (ED) / Hydro
Allocator Interchange Transaction Scheduling
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Energy Management System
(EMS) Primary Functions
Network Configuration / TopologyProcessor
State Estimation
Contingency Analysis
Three Phase Balanced Operator
Power Flow Optimal Power Flow
Dispatcher Training Simulator
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Distribution Automation (DA)
System Primary Functions
Voltage Reduction
Load Management
Power Factor Control
Two-Way Distribution Communications Short-Term Load Forecasting
Fault Identification / Fault Isolation / Service
Restoration Interface to Intelligent Electronic Devices
(IEDs)
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Distribution Management System (DMS)
Primary Functions
Three Phase Unbalanced Operator Power
Flow
Map Series Graphics
Interface to Automated Mapping / FacilitiesManagement (AM/FM) or GeographicInformation System (GIS)
Interface To Customer Information System(CIS)
Interface to Outage Management
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Intelligent Electronic Device (IED) – the
Building Block of Substation Integration andAutomation
Any device incorporating one or moreprocessors with the capability to receive orsend data/control from or to an external
source (e.g., electronic multifunction meters,digital relays, controllers)
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What is a Substation Integration andAutomation System?
Power System Equipment
(Transformers, Breakers)
IED Implementation
IED Integration
Substation Automation Applications
Utility Enterprise
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Substation Integration and
Automation Systems
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Substation User Interface
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TelCo SystemTelCo SystemLAN/WANLAN/WAN
Web Pages with:Web Pages with:
ooRealReal--time valuestime values
ooRelay settingsRelay settings
ooFault recordsFault records
DFR recordsDFR records
Custom filesCustom files
Fault/OscillographyFault/Oscillography
data filesdata files
Web Browser Web Browser
RealReal--timetime
SCADASCADA
RealReal--timetime
data & controlsdata & controls
44--wire lease linewire lease lineFrame relayFrame relay
ORACLE RdBORACLE RdB
Web server Web server
DNP3.0DNP3.0
All WANAll WAN
communications arecommunications are
via secure TCP/IPvia secure TCP/IP
RelaysRelays
MB+MB+Router Router
RTURTU
RealReal--time SCADAtime SCADA
data and controlsdata and controls
(any IED’s data)(any IED’s data)
Fault records, summariesFault records, summaries
and waveform data fromand waveform data from
relays (and settings)relays (and settings)
Web pages with AppletWeb pages with Applet
and Servlet (Java)and Servlet (Java)
software for updatessoftware for updates
What are the iff r nt
Sources of Information?
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SCADA Alarm Processing /
Filtering Capabilities
Knowledge-Based Alarm Suppression
Direct Linkages (can use pseudo statuspoints)
Indirect Linkages Area of Responsibility
Use for each alarm window and each
printer Use to route alarms to proper
windows/dispatchers and/or printers
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SCADA Alarm Processing /
Filtering Capabilities (continued)
Priority
Each point has a priority level
Every alarm window has an assignablealarm priority level
By increasing the alarm priority level of an
alarm window, lower priority alarms aresuppressed from the alarm window
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SCADA Alarm Processing / Filtering
Capabilities (continued)
Timed Alarm Suppression Each data point may be assigned a
transient filter
Used to suppress an alarm until it has
remained in the alarm state for the length
of time specified with the transient filter
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SCADA Alarm Processing /
Filtering Capabilities (continued)
Momentary Alarm Change Detect
Tracks rapid multiple state changes that
are recorded by the RTU Operations counter to track device
operations for maintenance reporting
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SCADA Alarm Processing / Filtering
Capabilities (continued) Alarm Acknowledge / Delete
Separate acknowledge and deleteactions
Alarm automatically deleted upon
acknowledgment if alarm has returned tonormal
On acknowledgment alarm will be
deleted from alarm list Alarm is deleted after a specified time
delay following acknowledgment of alarm
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SCADA Alarm Processing / Filtering
Capabilities (continued)
Historical Events File All events, including alarms, stored in a
daily file
Can be sorted and used to create reports
S t F t T ti
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System Factory Testing
S t Sit T ti
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System Site Testing
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Power System Action Time Frames
0.1 1 10 100 1000 10000
Time - Seconds
transient stability long-term stability
generator/excitationdynamics
LTCs & dist.
voltage reg.
excitation limiting
line/transformer overload
SVC, DC
mech.
switched cap’s
system operator
under-voltage
load shedding
relaying, incl. under-frequencyload shedding
SCADA
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