## 5 Verification of the Simulation
All wind turbines are set to operate at a high wind speed input state of 12 m/s. Figures 14 and 15 show the system frequency regulation curve and the running status of each unit in a hybrid plant station under different sudden load power increase degrees (10, 15, and 20 MW). The wind turbine output power is rated under high wind speed input, as Figures 14 and 15 demonstrate. The EEMD parameters can be changed so that the electric hydrogen production device serves as the hybrid plant station's central frequency regulation component and that the supercapacitor's output is minimal, leaving sufficient power for the subsequent frequency regulation tasks. Currently, the highest value of the system frequency drop under varying degrees of load power disturbance is 0.21 Hz, 0.32 Hz, and 0.43 Hz, respectively. For high wind speed input, the power flowing through the rotor-side converter is \(-\)0.587 MW, and the power flowing through the grid-side converter is the difference between its power and the compensation power of the supercapacitor. Three sets of wind turbines are configured to operate under different wind speed input conditions in order to account for the hybrid power station's aggregation impact. At two seconds, a sudden 15 MW power load is introduced to the system. Figure 16 shows the system frequency adjustment curve when the hybrid power station's multi-energy collaborative control technique and the other three control methods are used. Figure 14: System frequency regulation curve under high wind speed input. Figure 13: Operating state curves of each unit of the hybrid plant station under medium wind speed input. Figure 16 shows that the system's initial state power is balanced and that its frequency fluctuates pretty close to the 50 Hz power frequency. An abrupt rise in load power disrupts the system's power balance, and the hybrid power plant reacts swiftly. The lowest value of the system frequency is decreased to 49.69 Hz using the multi-energy collaborative control strategy of the EEMD algorithm, taking into account the dynamic characteristics of each unit of the hybrid power station and rationally allocating frequency regulation power. The lowest value of the frequency drop is 49.68 Hz when using the EMD allocation algorithm to allocate frequency regulation power instructions. The maximum frequency of the system is lowered to 49.66 Hz when the electric hydrogen production device is utilized to respond to the frequency regulation power independently. This is due to the operational characteristics of a single energy storage device. The system frequency decreases to 49.67 Hz when the SCESS is independently frequency-regulated. The control strategy suggested in this article has the best frequency regulation impact and the least frequency change when analyzed based on the system frequency. The operational power curves for the supercapacitor and electric hydrogen production systems are shown in Figure 17.  
Figure 16: System frequency regulation curve under different control strategies. Figure 15: Operating state curves of each unit of the hybrid plant station under high wind speed input. It can be seen from Figure 17 that when the control strategy proposed in this article is adopted, the load reduction in the electric hydrogen production device is larger, which is the main body in the frequency regulation process. The use of EMD algorithm distribution makes the power curve of the electric hydrogen production device smoother, but the overall output of the electric hydrogen production device is less, and the supercapacitor bears a large part of the frequency regulation power. The independent frequency regulation of the electric hydrogen production device has the largest load reduction, but the frequency regulation effect is not ideal due to the adjustment limitations of the electric hydrogen production device itself. Supercapacitors are limited by their own capacity and SOC when independent frequency regulation occurs, and the frequency regulation effect is poor. Figure 18 shows the supercapacitor SOC curve.