Automatic Generation Control
Economic Dispatch
EMS Map
  State Estimation
Operator Load Flow
Load Management

  Contingency Analysis
Dispatcher Load Flow
Optimal Power Flow
 
Economic Dispatch

Economic Dispatch models the electric power system (with one or more control areas) and dispatches the available generation resources to supply a given load for each control area in the most economic manner in real-time operation. The objective is to minimize the total generation cost (including fuel cost, plus emission cost, plus operation/maintenance cost, plus network loss cost) by meeting the following operational constraints:
  • System load demand

  • Downward-and-upward regulating margin requirements of the system

  • Lower and upper economic limits of each generating unit

  • Maximum ramping rate of each generating unit

  • Unit's restricted operating zones (up to three restricted zones per unit)

  • Emission allowance of the system (SO2, CO2, NOx)

  • Network security constraints (maximum mW power flows of transmission lines)

  • Supporting multiple I/O curves (incremental Heat Rate) and emission cost curves for different fuels.

The program operates in real-time, according to a schedule you determine Automatic Generation Control (AGC), e.g. every two (2) minutes. It can also be scheduled more frequently by AGC under various circumstances, such as changing the control mode of a unit in AGC, or the system base load deviation exceeding a pre-specified threshold, or a request to execute on demand by an operator.
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This site last updated: 30 September 2008.