KR-20260065091-A - New renewable energy system, marine power generation facility, new renewable energy storage method, and marine power generation facility controlling method

KR20260065091AKR 20260065091 AKR20260065091 AKR 20260065091AKR-20260065091-A

Abstract

A renewable energy system is provided, comprising: a renewable energy generator that generates renewable energy; an energy storage unit that stores the renewable energy generated by the renewable energy generator, including at least one water electrolysis module and a battery module; an energy distribution device that distributes the renewable energy to the energy storage unit; and an interface unit that receives outputs of the status of the renewable energy generator and the energy storage unit and user input, wherein the energy distribution device comprises: a power generation prediction module that predicts the power generation amount of the renewable energy generator during a planning period; an operation plan establishment module that establishes an operation plan for the water electrolysis module and the battery module based on the predicted power generation amount measured by the power generation prediction module; and an error compensation module that modifies the operation plan by optimizing the reserve power stored in the energy storage unit within an allowable cost.

Inventors

남승완
권동우
김형준
최지호

Assignees

에이치디현대중공업 주식회사

Dates

Publication Date: 20260508
Application Date: 20241031

Claims (16)

A renewable energy generator that generates renewable energy; An energy storage unit comprising at least one water electrolysis module and a battery module, and storing the renewable energy generated from a renewable energy generator; An energy distribution device for distributing the above-mentioned renewable energy to the energy storage unit; and It includes an interface unit that receives the output of the status of the above-mentioned renewable energy generator and the above-mentioned energy storage unit and user input, and The above energy distribution device is A power generation prediction module that predicts the power generation of a renewable energy generator during a planning period; An operation plan establishment module that establishes an operation plan for the water electrolysis module and the battery module based on the predicted power generation amount measured by the power generation prediction module; and A new and renewable energy system characterized by including an error compensation module that modifies the operation plan by optimizing the reserve capacity of the energy storage unit within the allowable cost.
In paragraph 1, The above allowable costs are It is calculated based on the power generation error value between the current power generation and the above-mentioned predicted power generation, and A new and renewable energy system characterized by periodically correcting the above-mentioned power generation error value according to changes in the above-mentioned current power generation amount.
In paragraph 2, The above allowable costs are A new renewable energy system characterized by calculating a cost factor by multiplying the cost factor calculated by adding a first cost factor calculated based on a power generation error value and a second cost factor set by the user by the estimated cost calculated in the operation plan establishment module.
In paragraph 3, A new renewable energy system characterized in that the interface unit includes an input unit that receives the second cost factor.
In paragraph 1, The above error compensation module is A new and renewable energy system characterized by modifying the operation plan to maximize the sum of reserves throughout the entire planning period.
In paragraph 1, The above error compensation module is A new and renewable energy system characterized by modifying the operation plan to secure a minimum reserve capacity throughout the entire planning period.
In paragraph 5 or 6, A new and renewable energy system characterized in that the above interface unit includes an option input unit for selecting a method to modify the operation plan in the error compensation module.
In paragraph 1, The above-mentioned driving plan establishment module is A new renewable energy system characterized by establishing an operation plan that minimizes costs based on the characteristics of the above-mentioned water electrolysis module and the above-mentioned battery module.
In paragraph 8, A renewable energy system characterized in that the characteristics of the above-mentioned water electrolysis module include at least one of rated capacity, minimum operating time, minimum shutdown time, and maximum load increase/decrease limit information.
In paragraph 8, A new and renewable energy system characterized in that the characteristics of the battery module include at least one of a minimum/maximum charge amount and a final target charge amount of the battery module.
In paragraph 1, The above-mentioned driving plan establishment module is A renewable energy system characterized by establishing an operation plan such that the battery module operates in a discharge mode when the amount of renewable energy generated is low, in order to avoid stopping the operation of the above-mentioned water electrolysis module.
In paragraph 1, The above-mentioned driving plan establishment module is A new and renewable energy system characterized by establishing an operation plan by linearizing the hydrogen production cost graph of the above-mentioned water electrolysis module into two or more sections.
In paragraph 1, The above interface unit is, A renewable energy system characterized by outputting at least one of the power generation amount of the above-mentioned renewable energy generator, the above-mentioned predicted power generation amount, the above-mentioned operation plan calculated by the above-mentioned error compensation module, and the above-mentioned operating state of the above-mentioned energy storage unit.
Marine structures installed or floating on the sea or seabed; and An offshore power generation facility comprising a renewable energy system according to any one of claims 1 to 13 mounted on the above-mentioned offshore structure.
A renewable energy storage method for distributing and storing energy generated from a renewable energy generator to an electrolysis module and a battery module, A power generation forecasting step for calculating the predicted power generation of a renewable energy generator during the planning period; An operation plan establishment step for establishing an operation plan for the water electrolysis module and the battery module based on the above predicted power generation amount; and It includes an error compensation step for modifying the operation plan by optimizing the reserve capacity of the energy storage unit within the allowable cost, and The above operation plan establishment step establishes an operation plan that minimizes costs based on the characteristics of the above water electrolysis module and the above battery module, and A renewable energy storage method characterized by calculating the above allowable cost based on the power generation error value between the current power generation amount and the above predicted power generation amount.
A control method for a marine power generation facility that distributes and stores energy generated from a renewable energy generator to an electrolysis module and a battery module, A power generation forecasting step for calculating the predicted power generation of a renewable energy generator during the planning period; An operation plan establishment step for establishing an operation plan for the water electrolysis module and the battery module based on the above predicted power generation amount; and It includes an error compensation step for modifying the operation plan by optimizing the reserve capacity of the energy storage unit within the allowable cost, and The above operation plan establishment step establishes an operation plan that minimizes costs based on the characteristics of the above water electrolysis module and the above battery module, and A method for controlling an offshore power generation facility characterized by calculating the above allowable cost based on the power generation error value between the current power generation amount and the above predicted power generation amount.

Description

New renewable energy system, marine power generation facility, new renewable energy storage method, and marine power generation facility controlling method The present invention relates to a renewable energy system that optimizes the operation of a water electrolysis system in response to changes in renewable energy, an offshore power generation facility, a renewable energy storage method, and a method for controlling an offshore power generation facility. As renewable energy sources such as solar and wind power gain attention as alternatives to fossil fuels and nuclear power, various technologies are being proposed to address the variability of renewable energy. Additionally, while hydrogen is receiving significant interest as a clean energy source, the current demand is being met through fossil fuel reforming methods, leading to an increasing need for hydrogen production methods that do not rely on fossil fuels. Water electrolysis is a method of producing hydrogen by using electricity to decompose water, and with the advancement of fuel cell technology, hydrogen has garnered attention as a next-generation eco-friendly energy source. Hydrogen plays a crucial role in energy storage and conversion, and can reduce dependence on fossil fuels and lead to an eco-friendly energy transition. For example, it can be utilized to power vehicles using hydrogen fuel cells or stored in power plants to generate electricity. These technologies are gaining attention as a response to climate change and are expected to play a significant role in pioneering new eco-friendly energy pathways. Hydrogen, primarily produced by the electrolysis of water, is regarded as a truly clean energy source. Technology development is underway to support the hydrogen production process by utilizing renewable energy sources such as solar and wind power for clean hydrogen production, and the advancement of these technologies is expected to play the most significant role in reducing the use of fossil fuels and decreasing greenhouse gas emissions. Energy storage systems (ESS) that store energy generated from renewable sources generally utilize electrochemical methods, represented by battery modules. Because energy is stored in the form of electricity, they offer the advantages of high efficiency and ease of use compared to other energy storage methods; however, they have the disadvantage of a relatively short lifespan and limited storage duration due to the high frequency of use (charging and discharging). Therefore, attention is being drawn to methods of storing renewable energy as hydrogen, the energy source for fuel cells, by utilizing water electrolysis systems. However, since it is difficult to accurately predict the amount of renewable energy generated, if the rated capacity of the water electrolysis facility is small relative to the generation volume, the generated renewable power must be reduced or discarded; conversely, if the capacity of the facility is large, a problem arises where the facility's capacity cannot be fully utilized. FIG. 1 is a block diagram illustrating an example of a new and renewable energy system of the present invention. FIG. 2 is a block diagram illustrating the operation plan establishment module and energy storage unit of the new and renewable energy system of the present invention. Figure 3 is a graph showing the water electrolysis load and hydrogen production cost of the renewable energy system of the present invention. Figure 4 is a table quantifying the characteristics of the water electrolysis module and battery module of the renewable energy system of the present invention. Figure 5 is a graph illustrating the relationship between the stored power amount and the production cost of the water electrolysis module of the renewable energy system of the present invention. Figure 6 is a graph showing the predicted power generation of the new and renewable energy system of the present invention. Figure 7 is a graph showing the operation plan and reserve capacity of the energy storage unit derived from the operation plan establishment module of the new and renewable energy system of the present invention. Figure 8 is a flowchart showing the algorithm of the prediction error compensation module of the new and renewable energy system of the present invention. FIGS. 9 to 11 are graphs illustrating the operation plan and reserve capacity of the energy storage unit modified in the error compensation module of the new and renewable energy system of the present invention. FIGS. 12 and 13 are drawings illustrating the interface section of the new and renewable energy system of the present invention. Hereinafter, embodiments disclosed in this specification will be described in detail with reference to the attached drawings. Identical or similar components regardless of drawing symbols will be assigned the same reference number, and redundant descriptions thereof will be omitted. The suffixes "module" and "part" used for compo