The role of the BRP
To help maintain the balance on the grid between generation and consumption, Elia has Balance Responsible Parties (BRP) at every access point.
Balance Responsible Party (BRP)
For each grid access point , there must be a designated BRP. The BRP may be a producer, major customer, energy supplier or trader.
As a result, each BRP is responsible for a portfolio of access points and must develop and take all reasonable measures to maintain the balance between injections, offtakes and commercial power trades within their portfolio.
Daily balance schedule
One day before the period in question, the BRP must submit to Elia a daily balance schedule for their portfolio for day D, which consists of:
- Expected injections and offtakes at each access point;
- Commercial power trades, i.e. purchases and sales, with other BRPs and/or related to imports and exports on the borders.
The daily balance schedule must be balanced on a quarter-hourly basis: the sum of injections and purchases must equal the sum of offtakes and sales. To maintain balance at portfolio level, a BRP can use aor a power exchange to exchange energy with other BRPs for the following day (day-ahead) or for the same day (intraday).
Elia uses the ex-post measurement data of the access points and the commercial trade schedules to verify whether a BRP has remained balanced. If a BRP incurs an imbalance on a quarter-hourly basis, the BRP is subject to the imbalance tariffs.
The imbalance tariff incentivises the BRP to keep their portfolio balanced or, in certain conditions, to help Elia keep the grid secure and reliable.
Study and design note on the integration of offshore wind in the Belgian balancing zone
A significant increase of the offshore wind production is expected up to 2020 in the Belgian offshore area. Once all offshore parks will be fully operational the total installed capacity will increase to 2300 MW. The variations in wind farms power production due to high wind speed (also defined as “storm event”) or sudden changes in wind power or direction (also defined as “ramping event”) might at that time trigger substantial imbalances in the Belgian control area. Furthermore, because all Belgian offshore wind parks are situated close to each other in the North Sea, it has been observed that they all behave in a similar way facing a storm or ramping event and that impact will mainly differ because of wind turbine technical characteristics.
To better understand the possible impact of storm and ramping event on the Belgian control area, ELIA realized in 2017 a first assessment with the support of the consultant 3E. Two major recommendations came out of this assessment:
- ELIA must develop – with support of external provider – a dedicated storm forecast model and;
- ELIA needs to elaborate specific operational procedure to make sure responsible market parties mitigate the expected impact of forecasted storm events
Based on these conclusions, ELIA elaborated and discussed with market parties the offshore integration design.