Application of synthetic profiles

Supplying customers who do not have metering with load curve recording nevertheless requires suppliers to determine a forecast daily schedule for the consumption of these customers.

For this reason, the grid operator has defined standardised synthetic profiles for several categories of customer. This is a virtual ¼-hourly load curve intended to represent the behaviour according to a statistical average of all customers in that category. The profiles were determined on the basis of actual measurements over a reference period and on a representative sample of each customer category. The annual integral of the load curve provided by a standardised synthetic profile represents an energy of 1000 kWh.

Before any supply begins, the network operator defines the type of profile to be used for the customer. The supplier determines the customer's estimated annual consumption.

The estimated annual consumption and the type of profile to be considered enable the supplier to determine a load curve for each customer supplied by applying the following formula to each ¼-hourly value of the normalised profile:

Wi estimé = Wi normé X (W estimé / 1000 kWh)

Wi estimé : ¼-hourly value of the estimated profile
Wi normé : ¼-hourly value of the normed profile
W estimé : customer's estimated consumption

The total of the estimated load curves can be used by the supplier to programme its supply.

Consumption deviations

After reading the customers, the operator has actual consumption for each customer supplied on the basis of profiles. This consumption generally differs from the consumption estimated by the supplier at the start of the period concerned by the reading.

The differences between actual consumption and estimated consumption have been supplied or taken over by the network operator. Creos Luxembourg S.A. will therefore invoice suppliers for these ¼-hourly differences by applying the tariff for balancing energy.