Trends in SCADA Technology for Public Power

William (Bill) RamboVice President, Business DevelopmentSurvalent Technology Corporationrambo@survalent.com

Mike ParkerSenior Electric System Dispatcher

Roseville Electricmparker@roseville.ca.us

Technology

We are being asked to do more…with less

Technology

Technology andthe pace of changeare relentless….

Technology

Our systems need updating

Technology

Agenda– Evolution of SCADA

– SCADA Costs

– Web Technology– City of Roseville case study

– Integration

– Q & A

SCADA Timeline

• Before SCADA– Simple Human-

Machine Interfaces provided basic equipment monitoring

– Limited information– Slow– Undependable– Messy…

• 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

• 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

• 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

BOTTOM LINE:

• Public Power Benefits tremendously!

• SCADA is not just for larger utilities

SCADACosts

Price/Performance

SCADAFeatures

SCADA Timeline

Web Technology

SCADA Trends

SCADA Trends

• Utilized to provide a secure interface to SCADA

• Provide transport for Data to and from SCADA

Web Technology

• 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

DMZ

Web-Server

Web Technology

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

• Instant, out-of-the-box SCADA web server.

• User-friendly drill-down interface to view configuration and information.

• Tabular and Graphical Displays

• 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.

Tabular Displays

• Dynamic– Station

data, hierarchical

– Alarms and operations messages

Tabular Displays

• Reports– Tagged devices– Abnormal points– Failed points– Manually set

points

– 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

City of Roseville Application

SCADA Trends

City of Roseville, California– Background– Situation– Solution– Benefits

Web Technology

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

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

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

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

Integration

SCADA Trends

• SCADA data is useful in other parts of the organization

• Examples:• Engineering Analysis• Outage Management• Metrics• Load Management• Geographical Information Systems

Integration

www.multispeak.org

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

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

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

• 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

Questions?

Thank you!