Coordinated Control Strategy for Off-grid Photovoltaic Hydrogen Production System Considering Source-Load Uncertainty

Aiming at the shortcomings of coordinated control strategy in off-grid photovoltaic hydrogen production systems, this paper proposes a coordinated control strategy for off-grid photovoltaic hydrogen production systems considering source-load uncertainty. The coordinated control strategy is based on the ratio of the maximum output power of the photovoltaic array to the operating power of the electrolytic cell, and the stability of the DC bus voltage is the basic goal, the system is divided into four working modes. The state of charge (SOC) of the lithium battery and the state of hydrogen (SOH) of the hydrogen storage tank are introduced into the system as feedback signals, and the working modes of the system are subdivided, so that the source-load can actively participate in the coordinated control of the system under good dynamic conditions. Finally, the simulation model of the off-grid photovoltaic hydrogen production system is constructed in Matlab/Simulink to verify the proposed coordinated control strategy.