KR-102962778-B1 - Green hydrogen production system and method based on renewable energy

Abstract

A system and method for producing green hydrogen based on new and renewable energy are provided. The system for producing green hydrogen based on new and renewable energy comprises: a power grid; a renewable energy supply part that generates power based on renewable energy; and a hydrogen production part that receives power from at least one of the power grid and the renewable energy supply part and performs the production of hydrogen of a predetermined high purity.

Inventors

• 김한울
• 김태우

Assignees

• 한국수력원자력 주식회사

Dates

Publication Date

20260508

Application Date

20250527

Claims (2)

1. As a renewable energy-based green hydrogen production system, Power system; Renewable energy supply parts that generate renewable energy-based power; An electric energy storage part in which power generated from the above-mentioned renewable energy providing part is charged; and It includes a hydrogen production part that receives power from at least one of the above power system, the above renewable energy supply part, and the above electric energy storage part, and performs the production of hydrogen of a preset high purity. The above renewable energy providing parts are: It includes the time when the above-mentioned renewable energy providing part is operated and the time when the above-mentioned renewable energy providing part is not operated, During the time when the above-mentioned renewable energy supply part is in operation, the above-mentioned hydrogen production part is operated at a minimum load level capable of performing the above-mentioned hydrogen production, and The above hydrogen production parts are: If the time during which the above-mentioned renewable energy supply part is not operated corresponds to a preset time, it is operated with a load fluctuation level capable of performing hydrogen production based on the above-mentioned power grid, and When the above-mentioned renewable energy supply part generates power, load operation is performed according to the charging capacity of the above-mentioned electric energy storage part, corresponding to the load fluctuation for hydrogen production, and The above-mentioned renewable energy providing part provides a first power to the above-mentioned hydrogen production part, and The above hydrogen production parts consume at least a second power for the production of hydrogen, and The above electrical energy storage parts are, Performing a first operation in which a corresponding power corresponding to the difference value between the first power and the second power is charged, or performing a second operation in which the corresponding power is discharged to the hydrogen production part, and The above hydrogen production parts are, The first operation and the second operation of the electric energy storage part are determined according to dynamic characteristics, The above dynamic characteristics are, It includes load fluctuations of the above hydrogen production parts and load following cycles for power generated from the above renewable energy supply parts, The above hydrogen production parts are, When the charging power of the above electrical energy storage part is greater than or equal to a preset first reference value, and the generated power of the above renewable energy providing part is greater than the consumed power of the above hydrogen production part, a first logic control operation is performed to increase the load. When the charging power of the above electrical energy storage part is greater than or equal to the above first reference value, and the generated power of the above renewable energy providing part is less than the consumed power of the above hydrogen production part, a second logic control operation is performed to maintain the load. When the charging power of the above electrical energy storage part is less than the above first reference value, if the generated power of the above renewable energy providing part is greater than the power consumed by the above hydrogen production part, a third logic control operation is performed to maintain the load, and When the charging power of the above electrical energy storage part is less than the above first reference value, and the generated power of the above renewable energy providing part is less than the consumed power of the above hydrogen production part, a fourth logic control operation is performed to reduce the load. New and renewable energy-based green hydrogen production system.
2. As a method for producing green hydrogen based on new and renewable energy, The stage in which the green hydrogen production system prepares for hydrogen production; and The above green hydrogen production system includes a step of producing hydrogen, The above green hydrogen production system is, Power system and, Renewable energy providing parts that generate renewable energy-based power, and An electric energy storage part that charges power generated from the above-mentioned renewable energy providing part, and It includes a hydrogen production part that receives power from at least one of the above power system, the above renewable energy supply part, and the above electric energy storage part, and performs the production of hydrogen of a preset high purity. The above renewable energy providing parts are: It includes the time when the above-mentioned renewable energy providing part is operated and the time when the above-mentioned renewable energy providing part is not operated, During the time when the above-mentioned renewable energy supply part is in operation, the above-mentioned hydrogen production part is operated at a minimum load level capable of performing the above-mentioned hydrogen production, and The above hydrogen production parts are: If the time during which the above-mentioned renewable energy supply part is not operated corresponds to a preset time, it is operated with a load fluctuation level capable of performing hydrogen production based on the above-mentioned power grid, and When the above-mentioned renewable energy supply part generates power, load operation is performed according to the charging capacity of the above-mentioned electric energy storage part, corresponding to the load fluctuation for hydrogen production, and The above-mentioned renewable energy providing part provides a first power to the above-mentioned hydrogen production part, and The above hydrogen production parts consume at least a second power for the production of hydrogen, and The above electrical energy storage parts are, Performing a first operation in which a corresponding power corresponding to the difference value between the first power and the second power is charged, or performing a second operation in which the corresponding power is discharged to the hydrogen production part, and The above hydrogen production parts are, The first operation and the second operation of the electric energy storage part are determined according to dynamic characteristics, The above dynamic characteristics are, It includes load fluctuations of the above hydrogen production parts and load following cycles for power generated from the above renewable energy supply parts, The above hydrogen production parts are, When the charging power of the above electrical energy storage part is greater than or equal to a preset first reference value, and the generated power of the above renewable energy providing part is greater than the consumed power of the above hydrogen production part, a first logic control operation is performed to increase the load. When the charging power of the above electrical energy storage part is greater than or equal to the above first reference value, and the generated power of the above renewable energy providing part is less than the consumed power of the above hydrogen production part, a second logic control operation is performed to maintain the load. When the charging power of the above electrical energy storage part is less than the above first reference value, if the generated power of the above renewable energy providing part is greater than the power consumed by the above hydrogen production part, a third logic control operation is performed to maintain the load, and When the charging power of the above electrical energy storage part is less than the above first reference value, and the generated power of the above renewable energy providing part is less than the consumed power of the above hydrogen production part, a fourth logic control operation is performed to reduce the load. New and renewable energy-based green hydrogen production method.

Description

Green hydrogen production system and method based on renewable energy The present invention relates to a new and renewable energy-based green hydrogen production system and method. Generally, renewable energy is stored in an electric energy storage system and utilized as an energy buffer, and hydrogen is produced by feeding the electricity stored in the storage system into a water electrolysis facility. To absorb the variability and intermittency of renewable energy, the storage system is used for charging, and once the power capable of operating the hydrogen production facility is charged into the storage system, the facility is operated using the power stored in the storage system. While this can supply stable power to the hydrogen production facility, the capacity of the storage system may become excessive, and when there is no renewable energy output—that is, when the power stored in the storage system decreases—the hydrogen production facility cannot be operated. FIG. 1 is a configuration diagram illustrating the configuration of a renewable energy-based green hydrogen production system according to one embodiment of the present invention. Figures 2 to 4 are graphs showing reference values according to Figure 1. FIG. 5 is a flowchart sequentially illustrating a method for producing green hydrogen based on new and renewable energy according to one embodiment of the present invention. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. The advantages and features of the present invention and the method (S100) for achieving them will become clear by referring to the embodiments described below in detail together with the attached drawings. However, the present invention is not limited to the embodiments disclosed below but can be implemented in various different forms. These embodiments are provided merely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims. Throughout the specification, the same reference numerals refer to the same components. Referring to FIG. 1, a renewable energy-based green hydrogen production system (hereinafter referred to as “system (100)”) according to one embodiment of the present invention includes a renewable energy supply part (110), an inverter (115), an ESS PCS (117), an electric energy storage part (120), a power grid (130), a converter (135), and a hydrogen production part (140). Here, the power system (130) of the above system (100) is linked with other power supply means and power demand places of the above system (100). The renewable energy supply part (110) of the above system (100) generates power corresponding to renewable energy. The hydrogen production part (140) of the above system (100) receives power from at least one of the power grid (130) and the renewable energy supply part (110). The hydrogen production part (140) performs the production of hydrogen of a predetermined high purity. The electric energy storage part (120) of the above system (100) is charged with power generated from the renewable energy providing part (110). The hydrogen production part (140) receives power from at least one of the power grid (130), the renewable energy providing part (110), and the electric energy storage part (120). In addition, the hydrogen production part (140) performs the hydrogen production. The renewable energy supply part (110) of the new system (100) is operated at a minimum load level that enables the hydrogen production part (140) to perform the hydrogen production. The above hydrogen production part (140) is operated with a load fluctuation level capable of performing hydrogen production based on the power system (130) when the time during which the above renewable energy supply part (110) is not operated corresponds to a preset time. Here, when the renewable energy providing part (110) generates power, the hydrogen production part (140) performs load operation according to the charging capacity of the electric energy storage part (120) and the ramp rate for hydrogen production. The above renewable energy providing part (110) provides a first power to the hydrogen production part (140). The hydrogen production part (140) consumes a second power for at least the hydrogen production, and the electric energy storage part (120) performs a first operation or a second operation. In addition, the electric energy storage part (120) is configured to charge a corresponding power corresponding to the difference between the first power and the second power as a first operation. As a second operation, the corresponding power is discharged to the hydrogen production part (140). Here, the hydrogen production part (140) determines the first operation and the second operation of the electric energy storage part (120) according to dynamic characte