2. LOAD DURATION CURVES POWER GENERATION || ECONOMICS OF POWER GENERATION IN ELECTRICAL POWER||

The load duration curve is defined as the curve between the load and time in which the ordinates representing the load, plotted in the order of decreasing magnitude, i.e., with the greatest load at the left, lesser loads towards the rights and the lowest loads at the time extreme right. 
This curve represents the same data as that of the load curve. The load duration curve is constructed by selecting the maximum peak points and connecting them by a curve.The load duration curve plotting for 24 hours of a day is called the daily load duration curve. Similarly, the load duration curve plotted for a year is called the annual load curve.
Procedure for plotting load duration curve

From the data available from the load curve determines the maximum lose and the duration for which it occurs.

Now take the next load and the total time during which this and the previous load occurs.

Plots the loads against the time during which it occurs.

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