Saudi Arabian Grid Code May 2024

Demand Control 4.7.4.1 If Demand Control due to Generation deficiency needs to be implemented, the TSP shall issue several Alerts to the Generators, and Dispatch Control Centers. These Alerts may include a Yellow Alert, Red Alert, or Amber Alert or any other Alerts as may be agreed from time to time by the Participants. 4.7.4.2 Yellow Alert may be issued when a single Event would give rise to a reasonable possibility of failure to meet the Power System Demand, or of frequency or voltage departing significantly from normal, or if multiple Events are probable due to prevailing weather conditions. 4.7.4.3 Amber Alert may be issued when the Contingency Reserve is zero, a Generation deficiency exists, or there is a Critical Loading or imminent overloading of the Transmission lines or Equipment. Amber Alert may be issued by 15:00 hours, a day ahead. The Amber Alert Warning shall specify the amount and the period during which the Demand reduction will be required due to anticipated frequency or voltage deviation significantly from normal. 4.7.4.4 Red Alert may be issued when either a Partial or a Total Shutdown of the Power System has taken place. 4.7.4.5 During Demand Control, Generation Dispatch shall cease and shall not be re- implemented until the TSP has determined that it is safe to do so. 4.7.4.6 Demand Control Imminent Warning shall be issued by the TSP when a Demand reduction is expected within the next thirty (30) minutes. The Demand Control Imminent Warning shall be effective for one (1) hour and shall be automatically canceled if it is not re-issued by the TSP. 4.7.4.7 The User shall notify the TSP of the amount of Demand reduction actually achieved after implementing the Demand Control. Chapter 4 - Operating Code The Saudi Arabian Grid Code Updated Version: May 2024 4.7.4.8 In the event of a protracted shortage in Generation and when a reduction in Demand is anticipated by the TSP to be prolonged, the TSP shall notify the User of the expected duration. 4.7.4.9 The Users shall abide by the instruction of the TSP with regard to the restoration of Demand. The restoration of Demand shall be achieved as soon as possible and the process of restoration shall begin immediately after the instruction is given by the TSP. 4.7.4.10 If a User intends to implement Demand Control for the following day through a Demand Disconnection at the Connection Point, it shall notify the TSP of the hourly schedule before 10:00 hours of the current day. The notification shall contain the following information: (i) The proposed (in the case of prior notification) and actual (in the case of subsequent notification) date, time, and duration of implementation of the Demand Disconnection; and (ii) The magnitude of the proposed reduction by the use of Demand Disconnection. 4.7.4.11 If the Demand Control involves the Disconnection of an industrial load, Voluntary Load Curtailment or any similar scheme shall be implemented by staggering the Curtailment wherein the Customers are divided into different Curtailment Groups (e.g. Saturday Group, Sunday Group, etc.). Users participating in the Voluntary Load Curtailment shall voluntarily reduce their respective loads for a certain period of time depending on the extent of the Generation deficiency. Industrial Users who implement a Voluntary Load Curtailment shall provide the TSP with the amount of the Demand reduction actually achieved. 4.7.4.12 The User shall provide the TSP with the amount of Demand reduction actually achieved by the use of the Demand Disconnection.