Power Dispatching Method for a De-Loading Operated Wind Farm Participating in Power System Frequency Regulation Considering Wake Effect

Under the guidance of the ‘dual carbon’ goals, the installed capacity of wind power continues to grow, increasing wind power penetration levels (WPPLs) and posing challenges to system frequency stability. Therefore, it is essential to study the control of wind farms operating in de-loading mode to participate in system frequency regulation (SFR). This paper proposes a power dispatching method for a de-loading operated wind farm that participates in power SFR considering the wake effect. It begins by grouping wind turbines (WTs) considering the wind's incoming angle and wake effects, which simplifies computational needs compared with controlling individual WTs. The method sets a priority for power distribution to maximise the use of WTs’ overspeed de-loading capacity, effectively increasing rotor kinetic energy and reducing pitch angle adjustments. This approach avoids complex optimisations and wind speed measurement for each WT, significantly boosting system robustness. To assess the effectiveness of this method, simulations using the EMTP-RV simulator were conducted under various wind speed angles, disturbance levels and WPPLs. The results indicate that the proposed strategy enhances the WF's ability to regulate system frequency and decreases the need for pitch adjustments.