Saudi Arabian Grid Code May 2024

Introduction This section specifies the procedure and terms and conditions of Operational Liaison between the TSP and the Users of the Transmission System to ensure that the emergencies do not jeopardize the operation of the Transmission System or the health of Plant and Equipment. 4.5.2 Objectives The objectives of this section are the following: (i) to provide a mechanism of coordination between all Participants to ensure that communication of Operations, Events, and Significant Incidents among them is timely and effective to minimize the implications of such events on the integrity of the Transmission System; (ii) to specify the Significant Incident reports to be issued by the TSP to Users, and by Users to the TSP, if any Significant Incident has occurred on the Transmission System or the User System; and (iii) to specify the procedure that the TSP shall adopt to investigate any Significant Incident that materially affected the Quality of service to another Participant. Chapter 4 - Operating Code The Saudi Arabian Grid Code Updated Version: May 2024 4.5.3 Procedure for Notification of Operations, Events, and Significant Incidents 4.5.3.1 The TSP shall notify an Operation, Event, and/or Significant Incident on the Transmission System which may have an Operational Effect on the System of any other Users. For NPP, the TSP shall inform immediately the Generating Station of any operational unavailability of any of the Connection Points of the auxiliary load as described in the section 2.5.1.6 and in the Connection Agreement. 4.5.3.2 A User shall notify an Operation, Event, and/or Significant Incident on the System of that User which may have an Operational Effect on the Transmission System. On notification by the relevant User, the TSP will notify any other User(s) on whose System(s) the Operation, Event, or Significant Incident will (or, in the TSP’s opinion, may) have an Operational Effect. 4.5.3.3 Timing and Form of Notification A notification (via an acceptable medium) under this section shall be given as far advance as practicable and shall be of sufficient detail to describe the Operation and to enable the recipient of the notification reasonably to consider and assess the implications and risks arising and will include the name of the individual reporting the Operation on behalf of the TSP or the User, as the case may be. 4.5.4 Significant Incidents Where a User notifies the TSP pursuant to this section of an Event which the TSP considers has had or may have had a significant effect on the Transmission System, the TSP will require the User to report that Event in writing in accordance with the provisions of this section. Such Event will be termed a "Significant Incident" and may include the following: (i) voltage outside operational limits; (ii) System frequency outside statutory limits; (iii) Load Disconnection; (iv) islanding conditions; and (v) System instability. Chapter 4 - Operating Code The Saudi Arabian Grid Code Updated Version: May 2024 4.5.5 Yellow Alert 4.5.5.1 A Yellow Alert, further defined in (4.7.4), will be issued by the TSP (subsequently to be confirmed in writing) to Users who may be affected when the TSP realizes that there is a risk of widespread and serious disturbance to the whole, or a part of, the Transmission System. 4.5.5.2 The Yellow Alert will contain such information as the TSP deems appropriate. 4.5.5.3 For the duration of a Yellow Alert, each User receiving the Yellow Alert shall take necessary steps to warn its operational staff and maintain its Plant and/or Apparatus in the condition in which it is best able to withstand the anticipated disturbance.