The power curve adjustment tab allows users to apply a power loss in time-series energy captures that varies with wind speed as a fraction of rated wind speed. This means that the same adjustment matrix can be applied to power curves for different air densities even though they reach rated power at different wind speeds. By default this has been set to a matrix provided by the Power Curve Working Group as a good example. The power curve adjustment loss cannot cause the power production for any time step to fall below zero.