Saudi Arabian Grid Code May 2024

Generation Synchronizing and Desynchronizing Times 5.4.3.1 Except in an emergency or by prior agreement, a Generating Unit/Station shall request permission of the TSP to Synchronize or De-synchronize. A Dispatch Instruction shall be issued to carry out the action. 5.4.3.2 The TSP will determine the required Synchronizing and De-Synchronizing times for the Generating Units in accordance with the times Declared in their Operating Characteristics, and will issue Dispatch Instructions to Generators accordingly. 5.4.3.3 If a Dispatch Instruction to a specific Generating Unit does not also contain a MW Output to be achieved then it shall be assumed that the Dispatch Instructions is to increase the output (following Synchronization) up to the level of Minimum Generation. 5.4.3.4 The issue of Dispatch Instructions for Active Power at the Connection Point will be made with due regard to any resulting change in Reactive Power capability and may include instruction for reduction in Active Power Generation to enable an increase in Reactive Power capability; 5.4.3.5 Where the TSP issues a Synchronizing time to a Generator for a specific Generating Unit and the Generator finds out that the Generating Unit will not Chapter 5 - Scheduling and Dispatch Code The Saudi Arabian Grid Code Updated Version: May 2024 be able to Synchronize within ± ten (10) minutes of the instructed time, the Generator will immediately inform the TSP of the situation and provide a new estimate of the Synchronizing time. Dispatch of Active Power Based on the Generation Schedule, on System conditions, and on other factors as may arise from time to time, the TSP may issue Dispatch Instructions to a Generator in relation to a specific Generating Unit, which has been Instructed to be Synchronized under (5.4.3), to adjust its Active Power output at a target frequency. On receiving and accepting a Dispatch Instruction to change the level of Active Power, the Generating Unit must without undue delay adjust the level of output of the Unit to achieve the new target within that Generating Unit’s Declared Operating Characteristics. A Unit shall be deemed to have complied with a Dispatch Instruction when it achieves an output within the allowable tolerance (as per the applicable agreement) of the Dispatched Output and within the time calculated for the change from its Declared Operating Characteristics. 5.4.4.4 The adjustment of Active Power output of a Unit operating in a Frequency Sensitive Mode for System frequency other than an average of 60 Hz, shall be made in accordance with the current Declared value of the droop setting of the Active Power Frequency Regulation for Power Park Modules or Governor Droop for Synchronous Generating Units. Dispatch of Reactive Power To ensure that a satisfactory System voltage profile is maintained and that sufficient Reactive Power reserves are maintained, the TSP may issue Dispatch Instructions in relation to Reactive Power. Mvar output: Where a Generating Unit is instructed to a specific output, the Generator shall achieve that output within a tolerance of ± two (2)% or ± one (1) Mvar (or such other figure as may be agreed with the TSP) by: (i) on load tap changing on the Generating Unit step-up transformer; or (ii) adjusting the setpoint of the Generating Unit Automatic Reactive Power Regulator or Automatic Voltage Regulator. 5.4.5.3 Once this has been achieved, the Generator will not tap change or adjust the setpoint of the Generating Unit Automatic Voltage Regulator without prior