Saudi Arabian Grid Code May 2024

Hz and for deciding whether or not to interrupt the Connection between his Plant and/or Apparatus and the Transmission System in the event of such a frequency excursion. 2.5.5.30 Following the disconnection from the Grid, the Synchronous Generating Unit/Station shall change over to House Load Operation for one (1) hour and, in the case of Synchronous Renewable Resource Generation, for one (1) hour or as long as it is technically feasible based on the Available Active Power. 2.5.5.31 Control Synchronizing shall be provided by Generators at circuit breakers identified by the TSP, which, depending on the Plant configuration, shall include: (i) the Generating Unit circuit breaker; and (ii) the Generator transformer HV circuit breaker. 2.5.5.32 The TSP will provide to the Generator signals from the TSP operated Plant and Apparatus as required to facilitate Synchronizing on the Generator transformer HV circuit breaker or the Generating Unit circuit breaker (as agreed with the TSP), in accordance with the relevant Connection Agreement. The Synchronizing facilities as stated in (2.5.5.28) shall facilitate Synchronizing under the following conditions: (i) Transmission System frequency within the limits specified in (2.4.2); (ii) Transmission System voltage within the limits as specified in (2.4.3). 2.5.5.33 The BESS shall have an active charging management to control the State of Charge (SoC) of the batteries. The description of the controller shall be included in the BESS documentation. Each BESS will be configured to provide any one or multiple System Services during on-line operation, based on real-time dispatch, SoC, and System needs. 2.5.5.34 Nearing SoC limits: As BESS approaches its SoC limits, the BESS will ramp down while charging, and ramp up while discharging. This ramp should be clearly defined by the Generator of the BESS and communicated to the TSP. 2.5.5.35 SoC Limits and Reactive Power Support: Through the full range of SoC limits (i.e., SoCmin to SoCmax), the BESS should be designed to provide Chapter 2 - Connection Code The Saudi Arabian Grid Code Updated Version: May 2024 full Reactive Power capability as required by the relevant System Services Agreement. SoC limits should not impact Reactive Power capability. 2.5.6 Requirements for Distribution Entities and Directly-connected Customers 2.5.6.1 At nominal System voltages of 110 kV and above, the higher voltage windings of three phase transformers and transformer banks connected to the Transmission System, if star-connected, shall have their star point suitable for connection to Ground. For this purpose neutral connection must be brought out of the tank to enable external connection to Ground. The Grounding and lower voltage winding arrangement shall be such as to ensure that the Ground Fault Factor requirement as stated in (2.4.8.1) of the Grid Code are satisfactorily met on the Transmission System at nominal System voltages of 110 kV and above. 2.5.6.2 As required in Chapter 4: Operating Code, each Distribution Entity shall make arrangements that shall facilitate automatic low frequency Disconnection of Demand. The Connection Agreement shall specify the manner in which Demand subject to low frequency Disconnection shall be split into discrete MW blocks with associated Under Frequency Relay settings. Technical requirements relating to Under Frequency Relays will be specified in the Connection Agreement or relevant standards. 2.5.6.3 The Under Frequency Relays for Automatic Load Dropping shall be provided at the Connection Point by the Users as per the Connection Agreement. The TSP may allow a User to have such schemes installed on User side of the Connection Point providing that, if considered necessary and required by the TSP, one hundred (100)% of the User load may be shed. 2.5.6.4 Distribution Entities and Directly-connected Customers, having contracted load more than