Member Login
Search
Past & Future Posts
Sponsored Communities
Cool stuff
Neat Stuff

Visit our shop for nerds in control lifestyle products.
Thermal Overload
The threads that wouldn't die...
- PC reliability?
- Windows, real time
- PID loops
- PCs vs. PLCs
- Replacing people
- MS 'monopoly'?
- Software quality
- Where do we go from here?
- Why pay?
- PC reliability?
- Windows, real time
- PID loops
- PCs vs. PLCs
- Replacing people
- MS 'monopoly'?
- Software quality
- Where do we go from here?
- Why pay?
Fortune
Dimensions will always be expressed in the least usable term.
Velocity, for example, will be expressed in furlongs per fortnight.
Velocity, for example, will be expressed in furlongs per fortnight.
RSS Feed
www.control.com/rss/
To get a personalized feed, become a member at no cost.
Can some one please explain briefly use of SOE (sequence of event) in power plant control loop.
Also what variables of Power plant are assigned as SOE.
Also what variables of Power plant are assigned as SOE.
The application for SOE is in the analysis of "what happened to cause a trip" or shutdown. Electric power distribution has a series of protective relays to prevent overload of distribution lines and to limit the load on generation equipment. In a complex distribution network, overload trips are automatic and sequential. When one overloaded circuit trips (the protective relay opens) the load often shifts to other circuits that are tripped in turn if they are overloaded. The only way to analyze exactly the sequence of trips after the fact, is to examine the trip log for the exact time of each trip. This is called a "post-mortem analysis." It is generally regarded that the trip time must be recorded to an accuracy of + or - 1 millisecond to determine the correct sequence - but only if all clocks are synchronized to the same time base.
Dick Caro
===========================================
Richard H. Caro, Certified Automation Professional, CEO, CMC Associates,
2 Beth Circle, Acton, MA 01720
Tel: +1.978.635.9449 Mobile: +.978.764.4728
Fax: +1.978.246.1270
E-mail: RCaro@CMC.us
Blog: http://DickCaro.liveJournal.com
Web: http://www.CMC.us
Buy my books:
http://www.isa.org/books
Automation Network Selection
Wireless Networks for Industrial Automation
http://www.spitzerandboyes.com/Product/fbus.htm
The Consumer's Guide to Fieldbus Network Equipment for Process Control
Buy this book and save 50% or more on your next control system!!!
Dick Caro
===========================================
Richard H. Caro, Certified Automation Professional, CEO, CMC Associates,
2 Beth Circle, Acton, MA 01720
Tel: +1.978.635.9449 Mobile: +.978.764.4728
Fax: +1.978.246.1270
E-mail: RCaro@CMC.us
Blog: http://DickCaro.liveJournal.com
Web: http://www.CMC.us
Buy my books:
http://www.isa.org/books
Automation Network Selection
Wireless Networks for Industrial Automation
http://www.spitzerandboyes.com/Product/fbus.htm
The Consumer's Guide to Fieldbus Network Equipment for Process Control
Buy this book and save 50% or more on your next control system!!!
From Control Engineering magazine...
Related articles from Control
Engineering magazine- Hot news in temperature: Industrial thermostat, infrared linescanner
- Growth: Expansions, acquisitions in U.S., abroad
- Energy efficiency included in U.S. financial bailout package; NEMA likes it
- Integrated systems for energy: Automation helps with production of windmills, oil, gas
- Automation Alliance Group adds Omnicon, MES, motion integration
- Troubleshoot ground loops quickly without disconnecting anything
- Project report: Oil & gas project calls for seamless integration of third-party technologies
- Project report: Polymer plant modernization includes major service contract
Above articles copyright 2008 Reed Business Information.
Subject to its Terms of Use.
Your use of this site is subject to the terms and conditions set forth under Legal Notices and the Privacy Policy. Please read those terms and conditions carefully. Subject to the rights expressly reserved to others under Legal Notices, the content of this site and the compilation thereof is © 1999-2008 Control Technology Corporation. All rights reserved.
Our Advertisers
Help keep our servers running...
Patronize our advertisers!
Patronize our advertisers!




