Saudi Arabian Grid Code May 2024

BESS response during normal, high, and low frequency 2.5.5.18 Each Renewable Resource Generation shall be capable of regulating its Active Power in the frequency range [57Hz, 59.8Hz] through modulation of the Active Power as a function of frequency deviations below 59.8Hz. The Active Power Droop shall be adjustable within 2% and 8%. The normal set point shall be generally at 4%. Output power shall be limited by the available output power and the minimum output power of the Generating Unit. 2.5.5.19 The Active Power output of the Renewable Resource Generation connected to the Network shall be controllable as long as technically feasible based on the Available Active Power. i. The Renewable Resource Generation shall be capable of receiving a Dispatch Instruction containing a required setpoint of Active Power output, of absolute Active Power Limitation, of Active Power delta Regulation and of Active Power Gradient, manually or through automatic remote control system. ii. Generation shall be able to manually or automatically take into account the Dispatch Instruction. iii. As long as the Active Power Output is not limited by the Available Active Power, the accuracy of the control performed and of the setpoint shall not deviate by more than 2% of the setpoint value or by 0.5% of the rated power, depending on which yields the highest Chapter 2 - Connection Code The Saudi Arabian Grid Code Updated Version: May 2024 tolerance and shall be reached in less than 10 minutes after the reception of the Dispatch Instruction. 2.5.5.20 Each Synchronous Generating Unit shall be equipped with high response Excitation System with continuously acting Automatic Voltage Regulation (AVR) system to control the Unit terminal voltage. The AVR shall be designed and operated to maintain the steady-state terminal voltage within ± 0.5% of the set point in the normal voltage range as specified in (2.4.3) without instability over the entire operating range of the Unit. Ceiling voltage for static Exciters shall be at least twice, and for brushless Exciters at least 1.6 times the rated field voltage of the Generating Unit. The Excitation System shall be capable of supplying its ceiling voltage for 10 seconds. Generators shall not disable this automatic control mode without prior approval of the TSP. Each Synchronous Generating Unit shall be required to include Power System Stabilizing (PSS) and var limiting Equipment as well. The PSS shall be tuned to provide positive damping to local as well as inter-area mode of oscillations in the frequency range of 0.15 – 2.0 Hz. For generating units that were added to the network before January 1, 2022, and furnished with single input PSS, shall be tuned to optimum capability, unless required by the TSP to comply with 0.15 – 2.0 Hz range based on justified technical requirements for the Generators. The PSS shall remain in service all the time except when synchronizing or when generation unit is at low load and based on control logic for protecting the unit or justified by the manufacturer and agreed by TSP. Each Power Park Module shall, at minimum, be able to provide reactive power automatically by the following control modes during normal operation: Voltage control mode; Reactive power control mode; The selected control mode shall maintain the steady-state terminal voltage within ± 0.5% of the normal voltage range specified in (2.4.3). The damping ratio of the output reactive power of each Power Park Module shall be at least 0.05. Each Power Park Modules which has a Registered Capacity greater than twenty five (25) MW in aggregate, shall be equipped with a Power Oscillation Chapter 2 - Connection Code The Saudi Arabian Grid Code Updated Version: May 2024 Damper (POD) capable of increasing or decreasing the output power in such a way to minimize the power oscillations in the low frequency range (0.15 –