Economic load dispatch concerns with the operating cost rather than the fixed cost
Only fuel cost is considered in the study where all other costs that are depend on
the generated power will be included in the expression of the fuel cost
Obviously, the cost of fuel is concerned since thermal plants are assumed
An early approach of power dispatch was to supply power from the most efficient
plant till the point of maximum efficiency and then from the next most efficient plant
and so on
Another approach was to load the machines so that
all units have the same incremental cost of production
However, the locations of power plants and the trans-mission losses are not
considered Generating power in far plants requires supplying the transmission
losses in addition to the load demand
Economic distribution of load demand among generating units necessitates
expressing the cost as a function of the generated power
The performance curve of boiler-turbine-generator set is required, which is called
input-output curve
Only fuel cost is considered in the study where all other costs that are depend on
the generated power will be included in the expression of the fuel cost
Obviously, the cost of fuel is concerned since thermal plants are assumed
An early approach of power dispatch was to supply power from the most efficient
plant till the point of maximum efficiency and then from the next most efficient plant
and so on
Another approach was to load the machines so that
all units have the same incremental cost of production
However, the locations of power plants and the trans-mission losses are not
considered Generating power in far plants requires supplying the transmission
losses in addition to the load demand
Economic distribution of load demand among generating units necessitates
expressing the cost as a function of the generated power
The performance curve of boiler-turbine-generator set is required, which is called
input-output curve
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