Photovoltaic off-grid hydrogen production system, control method and controller

Abstract

The invention provides a photovoltaic off-grid hydrogen production system, a control method and a controller. The system comprises at least one photovoltaic group string, the sum of the maximum output power of all the photovoltaic group strings is greater than the maximum operation power of hydrogen production equipment, each photovoltaic group string comprises a plurality of photovoltaic assembly devices which are sequentially connected in series, each photovoltaic assembly device at least comprises a photovoltaic assembly unit, at least one photovoltaic assembly device further comprises a turn-off device connected with the photovoltaic assembly unit, and each turn-off device is connected to the output end of the corresponding photovoltaic assembly, and is used for controlling the working state of the connected photovoltaic module unit. According to the invention, the controller monitors the operation parameters of the hydrogen production equipment and controls the on / off state of the turn-off device according to the operation parameters, so that the output power of the photovoltaic group string is adjusted, the output power of the photovoltaic group string is matched with the power required by the hydrogen production equipment, the efficiency of the hydrogen production equipment is improved, and the LCOE of the whole system is reduced.

Description

technical field [0001] The invention belongs to the technical field of photovoltaic power generation, and in particular relates to a photovoltaic off-grid hydrogen production system, a control method and a controller. Background technique [0002] With the rapid development of photovoltaic power generation technology, the cost of photovoltaic power generation is getting lower and lower. At the same time, due to the constraints of the consumption of regional power grids, the phenomenon of light abandonment has also appeared in many areas. Therefore, making full use of light energy to produce hydrogen has become a new trend. Among them, the photovoltaic off-grid hydrogen production system means that the system is disconnected from the public AC power grid, and only the photovoltaic power generation system provides electricity for hydrogen production equipment. [0003] The current photovoltaic off-grid hydrogen production system is usually a direct coupling system in which th...

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Problems solved by technology

[0004] In view of this, the purpose of the present invention is to provide a photovoltaic off-grid hydrogen production system, a control method and a controller to solve the technical problem of low utilization of photovoltaic energy and hydrogen production equipment in the traditional photovoltaic off-grid hydrogen production system. The scheme is as follows:

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