Saudi Arabian Grid Code May 2024

Dispatch Instructions to Generators 5.4.2.1 Dispatch Instructions will always be issued to Generators at the Control Center for their Generating Station. 5.4.2.2 Dispatch Instruction given by the TSP to a non-Renewable Resource Generator for a specific Generating Unit may involve a change in the Active Power output, a change in the Reactive Power output, Synchronizing and De- synchronizing time (if appropriate), a change to the mode of operation, or to provide one or more of the contracted System Services. Dispatch Instruction to Renewable Resource Generation shall be given by the TSP through the Saudi Sustainable Energy Control Center. Generation Dispatch Instructions for Active Power (sections 5.4.2, 5.4.3, 5.4.4) of Renewable Resource Generation are limited to participation in Frequency Regulation, Active Power output, Absolute Active Power Limitation, Active Power Delta Regulation and Active Power Gradient as specified in Chapter 2: Connection Code. 5.4.2.3 As Demand and Availability varies during real-time operation, the TSP will adjust Generating Unit MW output by using an economic loading order based on the Scheduling and Dispatch Parameters provided by Generators as part of their Nominations. 5.4.2.4 Dispatch Instruction will always be in accordance with Scheduling and Dispatch Parameters but shall take account of any temporary changes to these Parameters notified to the TSP under (5.3.6.8). A Dispatch Instruction given by the TSP to a Generator may be given orally, by phone, or in writing in accordance with the procedures detailed in Chapter 4: Operating Code. 5.4.2.5 A Dispatch Instruction must be formally acknowledged immediately by the Generator in respect of that Generating Unit by telephone, or a reason given immediately for non-acceptance. The reason for non-acceptance may only be on Safety grounds (relating to personnel or Plant) or because the Dispatch Instruction is not valid as detailed in the following clause. Chapter 5 - Scheduling and Dispatch Code The Saudi Arabian Grid Code Updated Version: May 2024 5.4.2.6 For a Dispatch Instruction to be valid, it must observe the limits of Availability, System Service capability and Operational Characteristics as properly Declared to the TSP in accordance with the provisions in a Declaration relevant to the time and period to which the Dispatch Instruction relates, subject to provisions of System Emergency Condition (5.4.7). 5.4.2.7 Additional factors which the TSP will, however, also take into account for issuing Dispatch Instructions are the effect of those Generators which have not complied with the TSP instructions or agreed Special Actions (including Demand Control) pursuant to (5.3.6.13) and variation between forecast and actual Demand as these will have an effect on Dispatch. 5.4.2.8 Where a Generator has two or more identical Generating Units at the same Site, the Generator may notify the TSP as to the preferred Unit to be Dispatched. The TSP shall however, select the Unit to be Dispatched, taking into account its obligations in operating the Transmission System. 5.4.2.9 In the event that in carrying out the Dispatch Instruction, an unforeseen problem arises, caused on Safety grounds (relating to personnel or, Plant), the Generator will notify the TSP by telephone without delay.