Hydroelectric generation and hydrogen production energy storage system of hydropower station

Abstract

The technical scheme of the invention is that a hydroelectric generation and hydrogen production energy storage system of a hydropower station comprises an AC/DC system, an electrolytic hydrogen production system, a hydrogen storage system, an oxygen storage system, a hydrogen fuel cell system and a DC/AC system. The input end of the AC/DC system is connected with AC power provided by a hydropowerstation hydroelectric generation system, and the output end of the AC/DC system is electrically connected with the input end of the electrolytic hydrogen production system to supply power to the electrolytic hydrogen production system; the electrolytic hydrogen production system produces oxygen and hydrogen by adopting water resources in the hydropower station; the oxygen storage system and the hydrogen storage system are respectively communicated with the hydrogen fuel cell system through pipes; the hydrogen fuel cell system receives hydrogen raw materials and oxygen raw materials provided by the hydrogen storage system and the oxygen storage system to generate a direct current; the output end of the hydrogen fuel cell system is electrically connected with a DC power consumption system and the DC/AC system. According to the invention, the electrolytic hydrogen production can be realized in the hydropower station, places do not need to be additionally arranged, land resources are effectively saved, and the safety and supervision intensity of the production process are ensured.

Description

technical field [0001] The invention relates to the technical field of water conservancy and hydroelectric machines, in particular to a hydroelectric power generation and hydrogen production energy storage system of a hydropower station. Background technique [0002] The water abandonment problem caused by the inability to absorb the electric energy of the hydropower station will cause huge economic losses. According to online data, in 2017, Sichuan announced that the province’s hydropower transfer, peak regulation, and water abandonment lost 14 billion kWh of electricity, while industry statistics showed that the province’s hydropower transfer and electricity abandonment reached 37.7 billion kWh, and the province’s abandoned water electricity was 55 billion kWh. According to online data, "Affected by the poor dispatch of power stations in the Jinsha River Basin, the Xiangjiaba Hydropower Station and the adjacent Xiluodu Hydropower Station have abandoned water and electricit...

AI Technical Summary

Problems solved by technology

[0007] 1) The electric energy for electrolytic hydrogen production comes from the grid side, and the purchase price of electricity is 0.55 yuan / kWh or above, and the problem of high electricity cost for electrolytic hydrogen production cannot be solved;

[0008] 2) Once the electric energy produced by the hydropower station enters the "transmission pipeline network", the hydropower station itself has no right to manage it and must be managed by the power company;

[0009] 3) Use the peak-valley difference of the power grid for electrolytic hydrogen production. Unless the electrolytic hydrogen production station is under the unified management of the power company, the power dispatching center has no right to issue instructions to the electrolytic hydrogen production station to increase or decrease production capacity; Company management, as a means of peak regulation, only has the function of one-way increasing power load, but not the function of releasing electric energy, that is, it can only consume electric energy but not store electric energy, and it cannot be a means of peak regulation in essence;

[0010] 4) Conventional hydropower stations are generally used as base load or waist load, and are rarely used as peak-shaving power sources. Generally, pumped-storage power plants are used as peak-shaving power sources. The excess power of this power station is not suitable for electrolytic hydrogen production.

[0011] 5) The command sent by the power grid dispatching center to the centralized control center of the power plant cannot include how much electric energy to supply for hydrogen production. Because the operation of the power station is not adjusted according to the grid dispatching instructions, the electric energy input into the "transmission pipeline network" is inconsistent with the requirements of the grid dispatching center. The above-mentioned operations are illegal operations of the power station. Leading to the collapse of the entire network and the collapse of the power system

[0012] Therefore, the invention scheme published in "A System Combining Electrolytic Hydrogen Production and Hydropower Station" (CN201710394045) is economically uncompetitive, technically infeasible, and difficult to practice

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