Common use of FRR Clause in Contracts

FRR. Frequency Restoration Reserve Shall include Tertiary Operating Reserve 1 (TOR1) and Tertiary Operating Reserve 2 (TOR2) as defined the EirGrid and SONI Grid Codes34 RR – Replacement Reserve Shall include Replacement Reserve (RR) as defined in the EirGrid and SONI Grid Codes PGM - Power Generating Module Shall mean the Grid Code definition ‘Generating Unit’ as defined in the EirGrid and SONI Grid Codes Demand Unit Shall mean the Grid Code definition ‘Demand Side Unit (DSU)’ as defined in the EirGrid and SONI Grid Codes Cross border sharing and exchange of reserves categories FCR, FRR and RR. The Interconnector Operating Protocols (IOP)5 make reference to a number of reserve services which are available to the TSOs: • These existing arrangements describe the current explicit services enabling the TSOs’ to share reserves across HVDC interconnectors. These services are not intended to preclude alternative methods of sharing or exchanging reserves • Static response may be used for cross- border sharing of FCR and FRR between the IE/NI synchronous area and the GB synchronous area. FCR, FRR and RR providing units Grid Code defines the requirements for the provision of POR, SOR and TOR by certain 3 SONI Grid Code, 4 EirGrid Grid Code 5 The IOP is Commercial in Confidence – Nonetheless, information relevant to this SAOA is reproduced in this SAOA or included in the Operational Constraints Update Grid Code Users in respect of their generating units and demand side units. In addition to those Grid Code requirements, reserve services are also defined in the System Services Technical Definitions decision paper. These define additional reserve categories such as Fast Frequency Response. Reference incident for the purposes of dimensioning FCR In IE/NI this is typically referred to as the loss of the largest single infeed (or outfeed) when determining the requirements for reserve scheduling. Table 1: SOGL Interpretation TITLE 2 Methodologies, Conditions and Values developed jointly by XxxXxxx and SONI to satisfy the SOGL requirements within the SAOA for IE/NI, which are subject to approval by the NRAs of IE and NI Article 3 The dimensioning rules for FCR in accordance with SOGL Article 153

FRR. Frequency Restoration Reserve Shall include Tertiary Operating Reserve 1 (TOR1) and Tertiary Operating Reserve 2 (TOR2) as defined the EirGrid and SONI Grid Codes34 RR – Replacement Reserve Shall include Replacement Reserve (RR) as defined in the EirGrid and SONI Grid Codes PGM - Power Generating Module Shall mean the Grid Code definition ‘Generating Unit’ as defined in the EirGrid and SONI Grid Codes Demand Unit Shall mean the Grid Code definition ‘Demand Side Unit (DSU)’ as defined in the EirGrid and SONI Grid Codes Cross border sharing and exchange of reserves categories FCR, FRR and RR. The Interconnector Operating Protocols (IOP)5 make reference to a number of reserve services which are available to the TSOs: •  These existing arrangements describe the current explicit services enabling the TSOs’ to share reserves across HVDC interconnectors. These services are not intended to preclude alternative methods of sharing or exchanging reserves •  Static response may be used for cross- border sharing of FCR and FRR between the IE/NI synchronous area and the GB synchronous area. FCR, FRR and RR providing units Grid Code defines the requirements for the provision of POR, SOR and TOR by certain 3 SONI Grid Code, 4 EirGrid Grid Code 5 The IOP is Commercial in Confidence – Nonetheless, information relevant to this SAOA is reproduced in this SAOA or included in the Operational Constraints Update Grid Code Users in respect of their generating units and demand side units. In addition to those Grid Code requirements, reserve services are also defined in the System Services Technical Definitions decision paper. These define additional reserve categories such as Fast Frequency Response. Reference incident for the purposes of dimensioning FCR In IE/NI this is typically referred to as the loss of the largest single infeed (or outfeed) when determining the requirements for reserve scheduling. Table 1: SOGL Interpretation TITLE 2 Methodologies, Conditions and Values developed jointly by XxxXxxx and SONI to satisfy the SOGL requirements within the SAOA for IE/NI, which are subject to approval by the NRAs of IE and NI Article 3 The dimensioning rules for FCR in accordance with SOGL Article 153

FRR. Frequency Restoration Reserve Shall include Tertiary Operating Reserve 1 (TOR1) and Tertiary Operating Reserve 2 (TOR2) as defined the EirGrid and SONI Grid Codes34 Codes45 aFRR – Automatic Frequency Automatic Generator Control (AGC) as defined in 5 EirGrid Grid Code Restoration Reserves the EirGrid Grid Code RR – Replacement Reserve Shall include Replacement Reserve (RR) as defined in the EirGrid and SONI Grid Codes PGM - Power Generating Module Shall mean the Grid Code definition ‘Generating Unit’ as defined in the EirGrid and SONI Grid Codes Demand Unit Shall mean the Grid Code definition ‘Demand Side Unit (DSU)’ as defined in the EirGrid and SONI Grid Codes Cross border sharing and exchange of reserves categories FCR, FRR and RR. The Interconnector Operating Protocols (IOP)5 make IOP) 6make reference to a number of reserve services which are available to the TSOs: •  These existing arrangements describe the current explicit services enabling the TSOs’ TSO’s to share reserves across HVDC interconnectors. These services are not intended to preclude alternative methods of sharing or exchanging reserves • between IE/NI and LFC Blocks in other synchronous areas  Static response may be used for cross- border sharing of FCR and FRR between the IE/NI synchronous area and the GB synchronous area. FCR, FRR and RR providing units Grid Code defines the requirements for the provision of POR, SOR and TOR by certain 3 SONI Grid Code, 4 EirGrid Grid Code 5 The IOP is Commercial in Confidence – Nonetheless, information relevant to this SAOA is reproduced in this SAOA or included in the Operational Constraints Update Grid Code Users in respect of their generating units and demand side units. In addition to those Grid Code requirements, reserve services are also defined in service the DS3 System Services Technical Definitions decision paper. These contracts currently awarded to reserve providers define additional reserve categories such as Fast Frequency Response. Reference incident for 6 The IOP is Commercial in Confidence. Nonetheless, information relevant to this SAOA is reproduced in this SAOA or included in the purposes of dimensioning FCR In IE/NI this is typically referred to as the loss of the largest single infeed (or outfeed) when determining the requirements for reserve scheduling. Table 1: SOGL Interpretation Operational Constraints update TITLE 2 Methodologies, Conditions and Values jointly developed jointly by XxxXxxx and SONI to satisfy the needs of the SOGL requirements within the SAOA LFCBOA for IE/NI, which are subject to approval by the NRAs of IE and NI Article 3 The dimensioning rules for FCR in accordance with SOGL Article 153regulatory authority approval

FRR. Frequency Restoration Reserve Shall include Tertiary Operating Reserve 1 (TOR1) and Tertiary Operating Reserve 2 (TOR2) as defined the EirGrid and SONI Grid Codes34 Codes45 aFRR – Automatic Frequency Automatic Generator Control (AGC) as defined in 5 EirGrid Grid Code Restoration Reserves the EirGrid Grid Code RR – Replacement Reserve Shall include Replacement Reserve (RR) as defined in the EirGrid and SONI Grid Codes PGM - Power Generating Module Shall mean the Grid Code definition ‘Generating Unit’ as defined in the EirGrid and SONI Grid Codes Demand Unit Shall mean the Grid Code definition ‘Demand Side Unit (DSU)’ as defined in the EirGrid and SONI Grid Codes Cross border sharing and exchange of reserves categories FCR, FRR and RR. The Interconnector Operating Protocols (IOP)5 make IOP) 6make reference to a number of reserve services which are available to the TSOs: • These existing arrangements describe the current explicit services enabling the TSOs’ TSO’s to share reserves across HVDC interconnectors. These services are not intended to preclude alternative methods of sharing or exchanging reserves between IE/NI and LFC Blocks in other synchronous areas • Static response may be used for cross- border sharing of FCR and FRR between the IE/NI synchronous area and the GB synchronous area. FCR, FRR and RR providing units Grid Code defines the requirements for the provision of POR, SOR and TOR by certain 3 SONI Grid Code, 4 EirGrid Grid Code 5 The IOP is Commercial in Confidence – Nonetheless, information relevant to this SAOA is reproduced in this SAOA or included in the Operational Constraints Update Grid Code Users in respect of their generating units and demand side units. In addition to those Grid Code requirements, reserve services are also defined in service the DS3 System Services Technical Definitions decision paper. These contracts currently awarded to reserve providers define additional reserve categories such as Fast Frequency Response. Reference incident for 6 The IOP is Commercial in Confidence. Nonetheless, information relevant to this SAOA is reproduced in this SAOA or included in the purposes of dimensioning FCR In IE/NI this is typically referred to as the loss of the largest single infeed (or outfeed) when determining the requirements for reserve scheduling. Table 1: SOGL Interpretation Operational Constraints update TITLE 2 Methodologies, Conditions and Values jointly developed jointly by XxxXxxx and SONI to satisfy the needs of the SOGL requirements within the SAOA LFCBOA for IE/NI, which are subject to approval by the NRAs of IE and NI Article 3 The dimensioning rules for FCR in accordance with SOGL Article 153regulatory authority approval