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Trends in SCADA Technology for Public Power
William (Bill) RamboVice President, Business DevelopmentSurvalent Technology [email protected]
Mike ParkerSenior Electric System Dispatcher
Roseville [email protected]
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Technology
We are being asked to do more…with less
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Technology
Technology andthe pace of changeare relentless….
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Technology
Our systems need updating
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Technology
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Agenda– Evolution of SCADA
– SCADA Costs
– Web Technology– City of Roseville case study
– Integration
– Q & A
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SCADA Timeline
• Before SCADA– Simple Human-
Machine Interfaces provided basic equipment monitoring
– Limited information– Slow– Undependable– Messy…
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• Q: How long have SCADA Systems been around?
• A: SCADA systems have been used in utilities & industry in the United States since the 1960s
SCADA Timeline
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• Networks non-existent• Proprietary (expensive) hardware and
software• Limited communication protocols: strictly
scanning and controlling points within the remote device
• Limited graphics displays• Communications were slow, unreliable
SCADA Timeline
1960’s 1990’s
More powerful processors allowed for distribution of individual SCADA system functions across multiple systemsImproved the redundancy and reliability of the systemStill largely proprietary software. PC technology emergingInformation available in real time
• Movement toward open system architecture
• Windows based systems emerge
• Possible now to distribute SCADA functionality across a Wide Area Network and not just a Local Area Network
• Easier for the user to connect third party peripheral devices (such as monitors, printers, disk drives, tape drives, etc.) to the system and/or the network
• Internet Protocol (IP) for communication between the master station and communications equipment allows for Ethernet connectivity
• Enhanced graphical displays
First Generation SCADA: Monolithic
Second Generation SCADA: Distributed
Third Generation SCADA: Networked
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• Integration of standard Information Technology• OS – Linux and Windows – limited UNIX• Increased use of Intel Processors (Windows and
Linux)• IP based RTU Communications (DNP/IP)• Integration of IED’s• Cyber Security – Post 9/11• SCADA connected to the enterprise
SCADA Timeline
SCADA Today
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BOTTOM LINE:
• Public Power Benefits tremendously!
• SCADA is not just for larger utilities
SCADACosts
Price/Performance
SCADAFeatures
SCADA Timeline
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Web Technology
SCADA Trends
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SCADA Trends
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• Utilized to provide a secure interface to SCADA
• Provide transport for Data to and from SCADA
Web Technology
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• Before Web Technology• Proprietary software required• Difficult (and potentially expensive) to give
multiple users access to the system• Limited access to SCADA data• Difficult to share access outside of the
enterprise
Web Technology
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DMZ
Web-Server
Web Technology
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Powerful application to serve real-time SCADA information across the entire enterprise:• Provides secure, read only access to SCADA information via a zero-maintenance web browser client. •Eliminates multiple instances of software to manage,• Custom web pages or,• Maintenance of a separate system.
Web Technology
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• Instant, out-of-the-box SCADA web server.
• User-friendly drill-down interface to view configuration and information.
• Tabular and Graphical Displays
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• Password protection• Off-loads client
workstation data requests from SCADA master
• Common pre-configured interface for all users, no need to build custom screens
• Supports maps, alarms, operations messages, reports and graphs
• Automatically retrieves data from alternate master during fail-over condition.
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Tabular Displays
• Dynamic– Station
data, hierarchical
– Alarms and operations messages
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Tabular Displays
• Reports– Tagged devices– Abnormal points– Failed points– Manually set
points
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– Server uses GUI as SVG graphics generator
– Dynamic point updates– Dynamic trend graphs
and feeder coloring– Navigation– Automatic and manual
layer control– Leverage software
investment– Leverage your graphics
database investment
Graphics
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City of Roseville Application
SCADA Trends
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City of Roseville, California– Background– Situation– Solution– Benefits
Web Technology
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City of Roseville, California• >43,000 meters• 17 distribution substations• Population doubled in last
decade• 6-8%System load increase
every year for past decade• Peak load 315 MW• SCADA System for 15 years• 160 MW power plant coming
on-line in 2007
Web Technology
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Situation• Only way to get into SCADA was via
single modem• Feeders at capacity• No 24 hour dispatch center
– Need for access to SCADA outside of business hours
• MS Access database for tracking load information had become support nightmare
– Getting data out of SCADA was always a management issue for IT
– Database size an issue for MS Access
– Many utility personnel who need information from SCADA
• Switching Power Marketing Services– Data input from ftp site– System load data to Power Marketer
Web Technology
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Solution: Web Server • Web server• Real-time replication of
SCADA database to SQL database– Historical data archive
• Web server knows when redundant SCADA servers fail over- pulls data from primary SCADA master
• Reporting – data from historical and real-time data for load information
Web Technology
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Benefits:• Easy access to SCADA
– User ID and password– Multiple personnel can access
• Security is maintained: Web Server outside of SCADA firewall
• Data in SQL database– Scalable, open platform
• Web pages for sharing of near real-time data
– Internal utility employees– Power Marketer
• Easy import of data, using web technology back into SCADA from power provider
Web Technology
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Integration
SCADA Trends
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• SCADA data is useful in other parts of the organization
• Examples:• Engineering Analysis• Outage Management• Metrics• Load Management• Geographical Information Systems
Integration
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MultiSpeak® Project Objectives
Industry-wide open initiative sponsored by the National Rural Electric Cooperative Association (NRECA) to facilitate development of software interfaces needed by rural electric co-ops
– Developed uniform interface definitions for data exchange among commonly used software
– Developed consensus among vendors about details of the interfaces, including data dictionary, data objects, and messaging framework
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What is MultiSpeak?• Specification for data exchange interfaces• Treats software applications as “black boxes”• Does not limit vendors from developing new
features or working together to provide tighter integration than presently supported by spec
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What MultiSpeak Does
• Defines which data objects need to be exchanged between common software
• Defines structure of those data objects• Specifies message structures and messaging
architectures• Supports real time and/or file-based data
exchanges
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• SCADA Price/Performance for Public Power
• Web Technology will provide value as an enabling technology:– Interface to SCADA– Transport for data to/from SCADA
• Integration of utility systems and elimination of “silos” of data will allow utilities to increase performance
Re-Cap
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Questions?
Thank you!