Reference time series for photovoltaic installations
Grid Access & Economic Grid Principles
Osloer Strasse 15-17
70173 Stuttgart, Germany
T +49 711 21858-3245
The majority of photovoltaic power plants are not metered according to production output.
Previously, the feed-in for these plants was determined by the distribution system operators based
on standard feed-in profiles and submitted to the transmission system operator as a transfer time
series for accounting purposes. These standard feed-in profiles do not correspond to actual
(weather-dependent) photovoltaic feed-in. This results in discrepancies between the market selling
and billing for electricity produced in photovoltaic power plants.
To solve this conflict, the German Bundesnetzagentur (Federal Network Agency) is proposing a reference measurement procedure for reporting relevant billable photovoltaic quantities. TransnetBW has developed a suitable reference measurement procedure that will allow distribution system operators to fulfil the requirements set out by the Federal Network Agency.
Die Dienstleistung im Detail
The distribution system operator receives a quarter-hourly sum load profile of the photovoltaic
feed-in for all non-metered photovoltaic power plants in the applicable grid zone.
The transfer of the reference time series data is conducted via email in ESS timetable format (optionally as CSV and/ or MSCONS file). In addition, the distribution system operator can choose between a daily update (150 EUR/ month) or a monthly report (100 EUR/ month). The service can be provided to all distribution system operators in the TransnetBW control zone. For any inquiries or questions, please feel free to contact the persons listed above right