Saudi Arabian Grid Code May 2024

Normal operating range: Transmission-connected facilities, 110-380 kV The BESS facility shall be capable of providing the specified frequency response to stabilize the Grid System frequency. The BESS facility shall be equipped with the frequency control droop settings. The default settings for Droop that will range between 2% to 8%, shall be agreed upon between the TSP and the Generator. The nominal droop settings is shown in Figure 2.4 below. During low/high frequency operating conditions, BESS shall be able to provide mandatory, instantaneous Active Power response to support, as agreed with the TSP, the frequency following droop settings. The action taken by the BESS will depend on whether it is in charging or discharging mode. Chapter 2 - Connection Code The Saudi Arabian Grid Code Updated Version: May 2024 (i) Low Frequency (a) In charging mode, the BESS shall reduce demand and change to discharge mode. If the System frequency still drops, the BESS shall stay connected until the protection is disconnecting the BESS. (b) In discharging mode, no decrease in output shall occur. The BESS shall continue discharging and respond according to the agreed droop settings. If the System frequency still drops, the BESS shall stay connected until the protection is disconnecting the BESS or if the BESS discharging level reaches an agreed level according to the relevant System Services Agreement. (ii) High Frequency (a) In charging mode, no decrease in Demand shall occur. The BESS shall continue charging and respond according to the agreed droop settings. If the System frequency still increases, the BESS shall stay connected until the protection is disconnecting the BESS or if the BESS charging level reaches an agreed level according to the relevant System Services Agreement. (b) In discharging mode, the BESS shall gradually reduce output and change to charging mode. If the System frequency still increases, the BESS shall stay connected until the protection is disconnecting the BESS or if the BESS charging level reaches an agreed level according to the relevant System Services Agreement. Chapter 2 - Connection Code The Saudi Arabian Grid Code Updated Version: May 2024 Figure