Cross-border: Exchanged reserve Capacity [SOGL 190.3]

Exchange of reserves (within SA or between SAs)
Regulation Article		SO GL article 190.3
Regulation text		Where applicable, all TSOs shall publish the information on the exchange of FCR, FRR and RR.
Detailed description		This requirement applies to exchange of reserves as defined in SO GL art. 3(96): “the possibility of a TSO to access reserve capacity connected to another LFC area, LFC block, or synchronous area to fulfil its reserve requirements resulting from its own reserve dimensioning process of either FCR, aFRR, mFRR or RR and where that reserve capacity is exclusively for that TSO, and is not taken into account by any other TSO to fulfil its reserve requirements resulting from their respective reserve dimensioning processes” Exchanges within a synchronous area and between synchronous areas are both within scope. Only exchange of balancing capacity shall be considered. Such exchange may occur as defined in EB GL articles 38 through 42 and 33 to 34. There are two requirements: a) The Exchange of FCR, FRR and RR reserves within the same Synchronous Area. b) The Exchange of FCR, FRR and RR reserves between different Synchronous Areas. Exchange of reserves can be bilateral, or if reserve procurement is done in cooperation among several TSOs, multilateral. If more than two parties exchange reserves, the exchange may not be available per border. Therefore, the information on the exchange of reserves shall be published as a reserve capacity surplus or deficit calculated as the locally connected reserve volume minus the local need according to the dimensioning process. As a reminder, dimensioning is performed per LFC block for FRR and RR and per SA for FCR. Two simple examples may illustrate this: 1) TSOs A and B in LFC areas ZA and ZB need 100 MW each of aFRR in upward direction. TSO A procures 110 MW, whereas TSO B procures 90 MW, and 10 MW is exchanged between the parties. Surplus in ZA is 10 MW, corresponding to the deficit in ZB. 2) TSOs A, B, C and D in LFC areas ZA, ZB, ZC and ZD need 100 MW each of aFRR in upward direction. In a common procurement, 110 MW is contracted in each of the zones ZA and ZB, whereas ZC and ZD provide 95 MW and 85 MW. The exchange cannot be clearly described in bilateral terms. But the aFRR surplus/deficit may be seen as 10 MW, 10 MW, -5 MW and -15 MW, respectively, for the LFC areas. FRR data shall be reported separately for aFRR and mFRR. Each exchange of reserves shall be described by the following attributes: - LFC Block or LFC area - The time interval during which reserves will be exchanged - Reserve type: RR, aFRR, mFRR or FCR - Direction: Up, Down or Symmetric - Reserve capacity export or import Capacity is expressed in MW with integer precision and ISP resolution.
Specification of calculation		The transparency platform does not need to make any calculations.
Primary owner of the data		TSO
Data provider		TSO
Aggregation
Publication deadline for ENTSO-E		No later than six hours before the use of the exchanged reserve capacity, aligning with the deadline for the publication of allocated cross-zonal capacity under EB GL art. 12.3.h, or as soon as possible if the exchange is planned later.
Updates		Normally not expected.
Comments		The allocation of cross-zonal capacity for the exchange of balancing capacity or sharing of reserves is published under EB GL art. 12.3.h. Information on the mechanisms for exchange of balancing capacity are published under EB GL art. 12.3.g and j. The rules for the exchange of balancing capacity are covered under Article 33 (and 34 if applicable) of the EB Regulation