Photovoltaic and fuel cell integrated power generation system based on photovoltaic hydrogen production and energy storage

Abstract

The invention discloses a photovoltaic and fuel cell integrated power generation system based on photovoltaic hydrogen production and energy storage. The system comprises a photovoltaic array, a photovoltaic-fuel cell integrated inverter, a proton exchange membrane water electrolysis tank, hydrogen storage equipment, a hydrogen fuel cell, a load, a power grid, a current sensor and an EMS management system, and is characterized in that the photovoltaic-fuel cell integrated inverter is connected with the photovoltaic array, the proton exchange membrane water electrolysis tank and the hydrogen fuel cell; the hydrogen storage equipment is connected between the proton exchange membrane water electrolysis tank and the hydrogen fuel cell; the photovoltaic-fuel cell integrated inverter comprises an MPPT control circuit, an inverter circuit and a DC conversion circuit; and the input end of the MPPT control circuit is connected with the photovoltaic array. A photovoltaic hydrogen production andenergy storage mode is used as an energy storage link, and the control method is to store surplus energy by electrolyzing water to produce hydrogen when photovoltaic power generation meets load powerconsumption and generates surplus energy, and when photovoltaic power generation does not meet load power consumption, the stored hydrogen is converted into electric energy through the fuel cell and even is combined with the power grid to supply power to the load, so that the continuity of system power supply is ensured, and the utilization rate of solar energy is further improved.

Description

technical field [0001] The invention relates to the field of new energy technology, in particular to a photovoltaic and fuel cell integrated power generation system based on photovoltaic hydrogen production and energy storage. Background technique [0002] In recent years, photovoltaic technology at home and abroad has made great progress, the performance and reliability of solar cells have been greatly improved, the cost and sales price have been continuously reduced, and it has reached the stage of large-scale production. The continuous reduction in the cost of solar photovoltaic power generation is conducive to the development of low-cost hydrogen production. Low-cost production of hydrogen is the key to realize the utilization of hydrogen energy. In addition, in photovoltaic applications, batteries are conventional energy storage devices, but the problems of high cost, heavy pollution, and short service life have been difficult to solve. The hydrogen energy recycled in...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the above disadvantages, thereby providing a photovoltaic and fuel cell integrated power generation system based on photovoltaic hydrogen production and energy storage, reversing the traditional way of using batteries (lead-acid or lithium batteries) as energy storage in the photovoltaic market, Avoid the problems of low economy and heavy environmental pollution caused by traditional batteries

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