## 6 Conclusions  
Due to its dynamic response ability and operating condition, the electric hydrogen production device in a hybrid plant station is unable to fully respond to the frequency regulation power of the system, as the wind turbines are unable to adapt to changes in the system's frequency. The following results are reached by the control method of collaborative frequency regulation proposed in this research between the electric hydrogen production device and the super-capacitor, which is based on the variable parameter EEMD algorithm for power allocation. 1. Using the reasonable number of electrolyzers opened and the variable parameter ensemble empirical-mode decomposition algorithm, considering the difference in dynamic characteristics of electric hydrogen production devices under different wind speeds, the system has a favorable frequency regulation effect under low, medium, and high wind speeds through a reasonable distribution strategy. 2. The frequency regulation control strategy based on the variable parameter EEMD algorithm is adopted for the hybrid plant station under different sudden load power increase degrees (10, 15, and 20 MW); the maximum frequency drop values are 0.23, 0.34, and 0.45 Hz under low wind speed input; in the case of medium wind speed input, the maximum frequency drop values are 0.21, 0.32, and 0.43 Hz; in the case of high wind speed input, the maximum frequency drop values are 0.21, 0.32, and 0.43 Hz. It can be seen that with a sudden increase in load power, the power response of the electric hydrogen production device and the energy storage device in the hybrid plant station, the frequency drop value of the system is limited within a reasonable range. 3. Taking the hybrid power plant's aggregation impact into consideration. The highest frequency drop values of the system are 0.31 Hz, 0.32 Hz, 0.34 Hz, and 0.33 Hz, respectively, when utilizing the hybrid power station frequency regulation control strategy based on the variable parameter control EEMD algorithm, the EMD distribution strategy, and two single energy control strategies. This is because the electric hydrogen production device's dynamic response capabilities and operational status limit its capacity to regulate frequency independently, and the supercapacitor's ability to regulate frequency independently is limited by its charging state. The variable parameter EEMD allocation algorithm has a more exact allocation impact than the EMD allocation algorithm. The frequency regulation control strategy of the hybrid power station is based on the variable parameter EEMD algorithm, which realizes the reasonable dispatch of multiple energy sources and enhances the frequency regulation capability of the hybrid power station. In summary, by building a simulation model of a hybrid plant station participating in the primary frequency regulation, this paper verifies that the proposed multi-energy cooperative frequency regulation control strategy based on the variable parameter control EEMD algorithm can assist the system frequency recovery and has a favorable frequency regulation effect, which provides a reference value for improving the wind power penetration capacity and promoting the wind power abandoning hydrogen production technology. \begin{table}
\begin{tabular}{c c c c} \hline \hline \multirow{2}{*}{**Working Conditions**} & \multirow{2}{*}{**Exploding Load/MW**} & \multicolumn{2}{c}{**System Frequency Drops to the Lowest Value**} \\ \cline{3-4}  & & **EEMD** & **EMD** \\ \hline \multirow{2}{*}{Consider wind power aggregation effects} & 10 & 49.79 & 49.77 \\  & 15 & 49.69 & 49.68 \\  & 20 & 49.57 & 49.54 \\ \hline \hline \end{tabular}
\end{table} 
Table 3: System frequency deviation. **Author Contributions:** Conceptualization, D.S. and J.Y. ; methodology, D.S. ; software, J.Y. and W.Z. ; validation, J.Y., W.Z. and J.R.; formal analysis, J.R.; investigation, W.Z. and G.Z. ; resources, G.Z. ; data curation, J.Y. ; writing--original draft preparation, D.S. and J.Y. ; writing--review and editing, D.S. and W.Z. ; visualization, J.Y.