What is a Balancing Responsible Party (BRP) / Access Responsible Party (ARP)?
The responsibility for maintaining the instantaneous balance between generation and consumption of electricity lies with the transmission system operator (TSO). The TSO has to assure that the control area they are responsible for is in balance. In Belgium there is only one control zone that is covering the whole country and is overlooked by Elia. The control area does not necessarily have to cover a whole country. For example, in Germany there are four zones. To assure the balance in the control area is maintained, Elia outsources this responsibility to the so-called Balance Responsible Parties (BRPs, in Belgium also called ARPs for Access Responsible Parties). A BRP is a private legal entity that overlooks the balance of one or multiple access points to the transmission grid. The BRPs portfolio is also called the balancing group. The BRP composes a balanced portfolio by combining injection, off-take, exchange with other BRPs and possibly in- or export to another control area. Each generator and off-taker in the grid is obliged to have a contract with a BRP/ARP. Alternatively, they can be their own balancing responsible party.
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