US 2026/0297761 A1Published application

Hydrogen-electric coupling control system and methd for off-grid green power-based hydrogen production

AssigneesState Grid Jiangsu Electric Power Co., Ltd. Research Institute, Jiangsu Electric Powe Research Institute Co., Ltd., State Grid Jiangsu Electric Power Co., Ltd.

InventorsXinda WANG, Rui ZHU, Xing ZHANG, Qunyan DING

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Abstract

A hydrogen-electric coupling control method for off-grid green power-based hydrogen production includes: performing maximum power point tracking (MPPT) control on each photovoltaic module to maximize an output power; distributing the output power to a power-type electrolyzer, and stabilizing a current on a low-voltage side at a specified value by adjusting a duty cycle of a boost direct current (DC)/DC converter, such that the power-type electrolyzer always operates at a rated power point; and distributing the output power to a regulation-type electrolyzer, and stabilizing a voltage on a high-voltage side at a target value by adjusting an output voltage of the boost DC/DC converter, such that the regulation-type electrolyzer absorbs a fluctuating part of a photovoltaic power. The hydrogen-electric coupling control method can effectively improve efficiency of a green power-based hydrogen production system, and realize stable and sustainable hydrogen production without relying on energy storage.

Claims18

Dependent claims

A hydrogen-electric coupling control system for off-grid green power-based hydrogen production, comprising:

a plurality of photovoltaic modules, wherein each of the plurality of photovoltaic modules is connected to an electrolyzer through a boost direct current (DC)/DC converter and maximizes an output power through maximum power point tracking (MPPT) control;
a plurality of electrolyzers comprising a power-type electrolyzer and a regulation-type electrolyzer;
and
a power distribution unit, comprising:
a power-type electrolyzer control module configured to distribute the output power to the power-type electrolyzer, and stabilize a current on a low-voltage side at a specified value by adjusting a duty cycle of the boost DC/DC converter, such that the power-type electrolyzer always operates at a rated power point;
and
a regulation-type electrolyzer control module configured to distribute the output power to the regulation-type electrolyzer, and stabilize a voltage on a high-voltage side at a target value by adjusting an output voltage of the boost DC/DC converter, such that the regulation-type electrolyzer absorbs a fluctuating part of a photovoltaic out power.

4 more elements

Dependencies are inferred from the claim text.