Direct-current coupling photovoltaic off-grid hydrogen production system and control method thereof
A hydrogen production system, DC coupling technology, applied in the direction of photovoltaic power generation, photovoltaic modules, DC power supply parallel operation, etc., can solve the problem of hydrogen production system shutdown, etc., to increase reliability, ensure maximum utilization, and enhance redundant performance. Effect
Active Publication Date: 2021-01-12
SUNGROW POWER SUPPLY CO LTD
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[0004] The invention provides a DC-coupled photovoltaic off-grid hydrogen production system and its control method to solve the problem in the prior art that the failure of the DC / DC converter will cause the shutdown of the entire hydrogen production system
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[0044] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.
[0045] The invention provides a DC-coupled photovoltaic off-grid hydrogen production system to solve the problem in the prior art that the failure of the DC / DC converter will cause the shutdown of the entire hydrogen production system.
[0046] Specifically, see figure 2 , the DC-coupled photovoltaic off-grid hydrogen production system includes: at least one hydrogen production tank system 102, at least one intelligent communication unit 103, and at least one power optimization string 101;...
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The invention provides a direct-current coupling photovoltaic off-grid hydrogen production system and a control method thereof. The direct-current coupling photovoltaic off-grid hydrogen production system comprises at least one hydrogen production tank system, at least one intelligent communication unit and at least one power optimization string, wherein an electrolysis equipment power supply endin the hydrogen production tank system receives output electric energy of a plurality of photovoltaic assemblies through N assembly-level power converters in corresponding power optimization strings.Even if one component-level power converter fails, the output electric energy of the corresponding photovoltaic component can be received through the other N-1 component-level power converters, so that the problem that the whole hydrogen production system is shut down due to the failure of a single DC / DC converter is avoided, the reliability of power distribution is improved, and the redundancy performance of the system is enhanced. Moreover, MPPT control is carried out through each component-level power converter in the power optimization string, maximum hydrogen production can be carried out, and maximum photovoltaic utilization is ensured.
Description
technical field [0001] The invention relates to the technical field of automatic control, in particular to a DC-coupled photovoltaic off-grid hydrogen production system and a control method thereof. Background technique [0002] In recent years, photovoltaic power generation has achieved rapid development, but due to its shortcomings of unstable power generation and low energy density, it often requires the cooperation of energy storage systems; hydrogen, as a completely pollution-free energy storage medium from production to end use, It is suitable for cooperating with photovoltaic power generation to make up for the above shortcomings. At present, most of the commercialized photovoltaic power generation hydrogen production systems adopt the grid-connected scheme. The electric energy of the photovoltaic power generation needs to undergo three-stage conversion of DC / AC / DC, the utilization rate of photovoltaic energy is low, the system equipment is large, and the cost is high...
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IPC IPC(8): H02J1/10H02S40/30C25B1/04C25B9/65C25B15/023
CPCH02J1/10H02S40/30C25B1/04C25B15/02Y02E10/50
Inventor 李江松谷雨徐君
Owner SUNGROW POWER SUPPLY CO LTD