13-10-2010, 12:19 PM
Introduction
Complex system time scale separation
Least cost system operation
Economic dispatch first view
Generator cost characteristics
Four curves of generator performance
Constrained optimization
Linear programming
Economic dispatch completed
Long term system planning: Production cost
Decide what to build
Hourly to monthly decisions: Unit commitment
Decide which plants to have warmed up and ready to go
Different technologies have different requirements
Minutes to Hour: Economic dispatch
Decide which plants to use to meet the expected load now
5 minutes to 1 hour
Cycles to Minutes: Short term system operations and Load Flow Model
Maintain supply and demand balance moment to moment
~17msec per cycle up to 5 minute control functions
For more details and ppt, please visit
http://science.smith.edu/~jcardell/Readi...%20ED1.ppt
