Flat-rate billing

The flat-rate billing model is intended for systems using power control. It is based on the “Pauschalabrechnungsverfahren” from the German Federal Network Agency, but can be applied to any location, provided the system fulfills the prerequisites. The model uses the last measured values before power curtailment within a defined period as illustrated in the table below:

The power of the last fully measured quarter of an hour before the regulation is used as a reference value. If the curtailment was made outside the valid period, the value from the previous day will be determined. This does not happen automatically: you must select the period manually to include the reference value. 

Prerequisites

For the model to be selected, the following data must be available:

• Grid operator or energy trader's relative active power setpoint value

• Time stamps correspond to the table

To calculate the loss of earnings, two conditions must be met:

• The reduced power during active power control must be lower than the reference value

• The measured power when power control is applied must be lower than the reference value

Formula