Water electrolysis hydrogen production system suitable for fluctuating power supply and control strategy thereof

Abstract

The invention discloses a water electrolysis hydrogen production system suitable for a fluctuating power supply and a control strategy, which combine a water electrolysis hydrogen production technology with a renewable energy power generation technology, simultaneously add an energy storage battery unit, determine the electrolysis power of an electrolytic cell according to the charge state of an energy storage battery pack. Therefore, the power of the electrolytic cell is only changed among a plurality of preset powers, the safety risk caused by the fluctuation of the electrolytic power of theelectrolytic cell under the condition of a fluctuating power supply is reduced, and particularly, the combination of an alkaline water hydrogen production technology which is originally inapplicableto the fluctuating power supply and the power generation of a renewable power supply becomes possible; and the large-scale and industrial application threshold of the renewable energy water electrolysis hydrogen production technology is reduced. The method not only can prepare real green and environment-friendly hydrogen, but also can carry out peak regulation and frequency modulation on a fluctuating power supply emitted by renewable energy sources.

Description

technical field [0001] The invention belongs to the technical field of hydrogen preparation and power grid peak-shaving energy storage, and in particular relates to a water electrolysis hydrogen production system for fluctuating power supplies and a control strategy thereof. Background technique [0002] As a green and clean energy carrier, hydrogen can truly achieve pollution-free emissions during use. The large-scale, affordable and sustainable production and use of hydrogen is an important development direction to achieve the goal of carbon neutrality. Hydrogen can be produced not only through fossil energy reforming, industrial by-product gas purification, etc., but also by electrolysis of water. [0003] Renewable energy sources such as solar energy and wind energy have greater intermittency and volatility. The large-scale grid connection of these power stations will have many adverse effects on the dispatch control, operation quality, and system safety and stability o...

AI Technical Summary

Problems solved by technology

At the same time, as renewable energy power generation comes online at a par, the cost of hydrogen production from electrolyzed water will continue to decline

[0005] However, how to safely and effectively couple the fluctuating power source from renewable energy with the water electrolysis hydrogen production system is still a difficult problem before us.

Especially for alkaline water electrolysis hydrogen production technology, compared with pure water electrolysis hydrogen production technology, the technology is more mature and the cost is lower, but the frequent fluctuation of hydrogen production will cause hydrogen to pass through the diaphragm and enter oxygen side, which leads to serious safety hazards, so it cannot be directly applied to fluctuating power supplies

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