Proton Exchange Membrane Hydrogen Production Load Collaborates With Energy Storage to Participate in the Evaluation of Peak Load Balancing Capacity of Power System

With the large-scale grid connection of renewable energy, the problem of insufficient regulation means of the power system is becoming increasingly prominent, and the original auxiliary service mode and strength can no longer meet the system operation demand. The PEM electro-hydrogen production can adapt to the high proportion and large-scale renewable energy grid-connected fast power tracking and regulation, which provides a new strategy for the reasonable distribution of power for peaking. Therefore, this paper constructs a grid-connected wind-solar hybrid hydrogen generation system with a PEM electrolyzer as the core. To comprehensively evaluate the peak shifting capability of PEM hydrogen production, a peak shifting multi-power mode control strategy is proposed under the approach of full-time hydrogen production and focused valley filling. At the same time, a multi-objective optimization peak shifting capacity assessment model is constructed considering the peak shifting economy, technology, and flexibility indexes. Based on the improved NSGA-III algorithm, the algorithm is optimized and solved to obtain the peaking capacity indicators under different scheduling scenarios, and the effectiveness of the proposed strategy and model is verified. The results show that while maximizing the consumption of renewable energy and improving the flexibility of system down-regulation, PEM hydrogen production is expected to enhance the market competitiveness of renewable hydrogen production through cost reduction and efficiency enhancement and to realize its large-scale application.