Abstract
With the aggravation of energy problems, the development and utilization of new energy has become the focus of all countries. As an effective new energy, the fuel cell has attracted the attention of scholars. However, due to the particularity of proton exchange membrane fuel cell (PEMFC), the performance of traditional PI controlled phase-shifted full-bridge power electronics DC-DC converter cannot meet the needs of practical application. In order to further improve the dynamic performance of the converter, this paper first introduces several main topologies of the current mainstream front-end DC-DC converter, and analyzes their performance in the fuel cell system. Then, the operation process of the phase-shifted full-bridge power electronics DC-DC converter is introduced, and the shortcomings of the traditional PI control are analyzed. Finally, a double closed-loop adaptive fuzzy PI controller is proposed, which is characterized by dynamically adjusting PI parameters according to different working states to complete the intelligent control of phase-shifted full-bridge DC-DC converter. The simulation results in MATLAB/Simulink show that the proposed algorithm has good a control effect. Compared with the traditional algorithm, the overshoot and stabilization time of the system are shorter. The algorithm can effectively suppress the fluctuation of the output current of the fuel cell converter, and is a very practical control method.
Highlights
The simulation results in MATLAB/Simulink show that the algorithm proposed in this paper has a better control effect
In order to achieve the better control effect, this paper proposes adaptive fuzzy PI control and compares it with the traditional PI control
We have introduced the principle of DC-DC converter based on the traditional PI controller
Summary
With the development of society, people’s demand for electricity is rising sharply. It plays an increasingly important role in human life. Fossil fuels are limited in reserves, and have a bad impact on the environment [1]. It is necessary to explore clean and reliable alternative energy, which does not rely on fossil fuels. These alternative energy sources include solar energy, wind energy, biomass energy, geothermal energy, tidal energy, hydropower, etc. The energy obtained from these sources is called renewable energy [2]. The advantage of renewable energy is that it is inexhaustible and will not pollute the environment.
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