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Objective: Through the design and simulation of hybrid thermal energy storage control of photovoltaic fuel cell, the hybrid thermal energy storage system of photovoltaic fuel cell is further optimized. Method: Firstly, the mathematical model of photovoltaic power generation is established. Then voltage feedback, power feedback, disturbance observation method and conductance increment method are used to track the maximum power of the system. After that, the dynamic model of proton exchange membrane fuel cell is established, and the former maximum power point tracking control strategy is used to keep the voltage stable. Finally, simulation experiments are carried out to verify the effectiveness and superiority of the proposed control strategy and battery model. Results: The hydrogen pressure on the anode side of the fuel cell can be maintained at 0.3 MP at a fast speed. In the process of output, the voltage of fuel cell is much smaller than the polarization voltage of fuel cell. Its voltage decreases gradually from 14 seconds to 16 seconds. Once the illumination changes suddenly, the system can also accurately locate and track the maximum power point, and output the electric quantity. Conclusion: Based on the mathematical model of photovoltaic power generation and the dynamic model of proton exchange membrane fuel cell, the hybrid thermal energy storage system of photovoltaic fuel cell has great advantages. It can keep the voltage stable and track the maximum power of the system in time, which is of great significance for the follow-up research in photovoltaic power generation.
PAPER REVISED: 2020-01-15
PAPER ACCEPTED: 2020-01-26
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THERMAL SCIENCE YEAR 2020, VOLUME 24, ISSUE Issue 5, PAGES [3259 - 3267]
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