Transcript Document

Trends in SCADA Technology for
Public Power
William (Bill) Rambo
Vice President, Business Development
Survalent Technology Corporation
[email protected]
Mike Parker
Senior Electric System Dispatcher
Roseville Electric
[email protected]
Technology
We are being
asked to do more…
with less
Technology
Technology and
the pace of change
are 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 HumanMachine Interfaces
provided basic
equipment monitoring
– Limited information
– Slow
– Undependable
– Messy…
SCADA Timeline
• 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
First Generation SCADA: Monolithic
• Networks
non-existent
Second
Generation SCADA: Distributed
Third
Generation
• Proprietary (expensive)
hardware
and SCADA: Networked
processors allowed for
software More powerful
•
Movement
open
system architecture
distribution of individualtoward
SCADA
system
• Limited communication
strictly
• protocols:
Windows
based
systems emerge
functions
across
multiple
scanning and controlling points withinsystems
the
Improved• the
redundancy
and
Possible
now to distribute
SCADA functionality across a
remote device
reliability
of the
system
Wide
Area Network and not just a Local Area Network
• Limited graphics
displays
Still largely
proprietary
software.
PC
• slow,
Easier
for the
user to connect
third party peripheral
• Communications were
unreliable
technology emerging
devices (such as monitors, printers, disk drives, tape
Information drives,
available
etc.)intoreal
the time
system and/or the network
•
•
1960’s
Internet Protocol (IP) for communication between the
master station and communications equipment allows for
Ethernet connectivity
Enhanced graphical displays
1990’s
SCADA Timeline
SCADA Today
• 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
BOTTOM LINE:
• Public Power Benefits tremendously!
• SCADA is not just for larger utilities
SCADA
Costs
Price/
Performance
SCADA
Features
SCADA Trends
Web Technology
SCADA Trends
Web Technology
• 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.
•
•
•
Instant, out-ofthe-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 preconfigured 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
Graphics
– 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
SCADA Trends
City of Roseville Application
Web Technology
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
SCADA Trends
Integration
Integration
• SCADA data is useful in other parts of the
organization
• Examples:
• Engineering Analysis
• Outage Management
• Metrics
• Load Management
• Geographical Information Systems
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
Re-Cap
• 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
Questions?
Thank you!