Active Frequency Regulation Strategy for Electrolytic Hydrogen Production Load based on Current-type Virtual Synchronous Machine Control

Hydrogen energy, as a zero-carbon green secondary energy, has the advantages of high energy density and high conversion efficiency. The integration of renewable energy electrolysis hydrogen production enables the entire process, from hydrogen production to utilization, to achieve zero carbon emission. However, the frequency stability is compromised due to the lack of inertia of the system, necessitating urgent implementation of effective frequency regulation measures to enhance stability. On the basis of the scheme of full control rectifier as the power supply topology of electrolytic stack, a control strategy of current source virtual synchronous machine is proposed in this paper. The hydrogen production power of electrolytic hydrogen production load is adjusted bases on the system frequency, so as to provide inertia damping support in the transient process and the primary frequency regulation in the steady state, This method contributes to enhancing the frequency stability of the system to a certain extent. Finally, the effectiveness of the proposed control strategy is verified through simulations on PSCAD/EMTDC simulation platform and experiments.