Using power generated by photovoltaic to produce hydrogen is not only an effective way to absorb a high proportion of new energy

but also an important support to achieve the “dual carbon” target. A photovoltaic hydrogen production system model with common DC bus is established. By conducting maximum power point tracking(MPPT) control for photovoltaic system

the maximum power point of the photovoltaic cell can be dynamically matched with the working curve of alkaline electrolyzer

so as to realize the maximum utilization of photovoltaic energy. In order to solve the problem of global maximum power point search under non-uniform illuminance

an MPPT control method based on Fibonacci search is proposed. The results show that

the MPPT method based on Fibonacci search can be used for MPPT control of photovoltaic systems with uniform irradiance and non-uniform irradiance. The tracking accuracy of single-peak power curve is close to 99%

and the average tracking accuracy of multi-peak power curve is close to 98%. The alkaline electrolytic cell works in voltage control mode. With the cooperation of MPPT controller and storage compensation

the efficiency of hydrogen production can be kept at more than 70% when the power is sufficient.