Clearing
Once a month, APCS conducts a settlement of imbalance, a so-called “clearing”. For this purpose,
all grid operators must transmit the complete metering and measurement data on a fifteen minute
basis. This includes the reporting of the production units and grid transfer volumes to other
grids.
Electricity dealers are obligated to report their business activities in the form of “ trading schedules” and “consumption estimates”. In order for the system to be a closed one, the system operator must report the import and export volumes to APCS as well as the energy volumes that are needed to regulate the overall grid.
There are, of course, wide fluctuations between the consumption estimates and the actual consumption as well as between production forecasts and actual production that may threaten the stability of the electricity grid. The system operator has the suitable instruments for correcting these fluctuations in the electricity grid.
Usually, these “instruments” are power plants at which production can be increased or reduced as needed on short notice.
In Austria, not only trading in electricity has been deregulated, but also trading in the energy that is necessary to stabilize the grids, namely, in so-called balancing energy.
To this end, APCS provides an Internet-based trading platform through which all companies that have the technical requirements may place bids for tertiary control reserve. This has not only established a new market, but it also ensures that the grid is kept stable at the most attractive bids. This system ensures that all companies deliver production and consumption forecasts that are as precise as possible, as no one wants to receive a high balancing energy bill.
At the monthly clearing session, the balancing energy volumes per market participant are determined for every quarter of an hour for the period of the preceding month.
Based on a market-oriented clearing pricing model (description available only in German), the clearing prices are determined on a 15 minutes basis. There is only one price per time unit. The prices on the balancing energy market as well as the prices on the energy exchange are included in the calculation of clearing prices. The clearing pricing model is designed in such a manner that high balancing energy volumes translate into high clearing prices. The costs of the balancing energy resources incurred in the course of a month for the diverse balancing energy qualities (tertiary control reserve, market maker, secondary control reserve, UCTE) are included in the clearing pricing model.
The balancing energy volumes per quarter of an hour are assigned to the corresponding clearing price; this ensures that the originator of the control reserve needed also carries the respective costs.
The debits and the credits are prepared on this basis for all market participants (balance responsible party, grid operator, balancing energy provider) of the balance area APG.
Electricity dealers are obligated to report their business activities in the form of “ trading schedules” and “consumption estimates”. In order for the system to be a closed one, the system operator must report the import and export volumes to APCS as well as the energy volumes that are needed to regulate the overall grid.
There are, of course, wide fluctuations between the consumption estimates and the actual consumption as well as between production forecasts and actual production that may threaten the stability of the electricity grid. The system operator has the suitable instruments for correcting these fluctuations in the electricity grid.
Usually, these “instruments” are power plants at which production can be increased or reduced as needed on short notice.
In Austria, not only trading in electricity has been deregulated, but also trading in the energy that is necessary to stabilize the grids, namely, in so-called balancing energy.
To this end, APCS provides an Internet-based trading platform through which all companies that have the technical requirements may place bids for tertiary control reserve. This has not only established a new market, but it also ensures that the grid is kept stable at the most attractive bids. This system ensures that all companies deliver production and consumption forecasts that are as precise as possible, as no one wants to receive a high balancing energy bill.
At the monthly clearing session, the balancing energy volumes per market participant are determined for every quarter of an hour for the period of the preceding month.
Based on a market-oriented clearing pricing model (description available only in German), the clearing prices are determined on a 15 minutes basis. There is only one price per time unit. The prices on the balancing energy market as well as the prices on the energy exchange are included in the calculation of clearing prices. The clearing pricing model is designed in such a manner that high balancing energy volumes translate into high clearing prices. The costs of the balancing energy resources incurred in the course of a month for the diverse balancing energy qualities (tertiary control reserve, market maker, secondary control reserve, UCTE) are included in the clearing pricing model.
The balancing energy volumes per quarter of an hour are assigned to the corresponding clearing price; this ensures that the originator of the control reserve needed also carries the respective costs.
The debits and the credits are prepared on this basis for all market participants (balance responsible party, grid operator, balancing energy provider) of the balance area APG.