KR102384052B1 - Power supply system and method - Google Patents

Abstract

According to an embodiment, a hydrogen fuel cell power generation unit for generating electricity using hydrogen as a raw material; an ESS responsible for storing power produced by the hydrogen fuel cell power generation unit and supplying power to a load; a database for storing power load information; Calculate the expected daily load and the total expected load for the target period using the power load information of the same period in the past, and compare the unit price of the hydrogen fuel cell power generation unit with the charge for each section of the external power supply for the total expected load. a calculation unit for calculating a power generation schedule of the hydrogen fuel cell power generation unit and a charge/discharge schedule of the ESS for the target period; and a control unit for controlling the hydrogen fuel cell power generation unit and the ESS according to the power generation schedule of the hydrogen fuel cell power generation unit and the charging/discharging schedule of the ESS.

Description

Power supply device, system and power supply method {Power supply system and method}

An embodiment of the present invention relates to a power supply device, a system, and a power supply method, and more particularly, to a power supply device, a system, and a power supply method for supplying power to a residential power load.

The electricity provider installs a watt-hour meter in the house or building to measure the amount of electricity consumed in the house or building, checks the total amount of electricity consumed in the place through the meter reading of the number displayed on the watt-hour meter, and determines the total amount of this electricity Electricity rates are charged to users in proportion to the

On the other hand, mankind, facing global environmental problems, is striving for energy conversion, and thus, renewable energy generation is spreading in the electric energy field as well. In line with this, Korea is implementing a policy to revitalize the hydrogen economy, and the expansion of new and renewable energy using hydrogen is expected.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a power supply device, a system, and a power supply method capable of supplying power at an optimal cost while minimizing the influence on a variable central grid rate system.

Another object of the present invention is to provide a power supply device, a system, and a power supply method capable of expanding the use of renewable energy and reducing the load on the central grid.

According to an embodiment, a hydrogen fuel cell power generation unit for generating electricity using hydrogen as a raw material; an ESS responsible for storing power produced by the hydrogen fuel cell power generation unit and supplying power to a load; a database for storing power load information; Calculate the expected daily load and the total expected load for the target period using the power load information of the same period in the past, and compare the unit price of the hydrogen fuel cell power generation unit with the charge for each section of the external power supply for the total expected load. a calculation unit for calculating a power generation schedule of the hydrogen fuel cell power generation unit and a charge/discharge schedule of the ESS for the target period; and a control unit for controlling the hydrogen fuel cell power generation unit and the ESS according to the power generation schedule of the hydrogen fuel cell power generation unit and the charging/discharging schedule of the ESS.

The calculation unit compares the fee for each section with the power generation unit price for each section and distributes the total expected load according to the power supply source so that the cost is minimized to calculate the total power supply and demand of the external power supply and the total power supply and demand of the ESS there is.

The fee for each section is set according to the electricity tariff table of Korea Electric Power Corporation, and the power generation unit price may be set in advance by the user.

The calculation unit may calculate the daily power supply and demand of the external power supply and the daily power supply and demand of the ESS with respect to the expected daily load according to the ratio of the total power supply and demand of the external power supply to the total power supply and demand of the ESS.

The calculation unit may adjust the daily power supply/demand amount of the external power supply source and the daily power supply/demand amount of the ESS in consideration of the total storage capacity of the ESS.

The calculation unit may calculate the power generation schedule of the hydrogen fuel cell power generation unit and the charging/discharging schedule of the ESS by using the daily power supply and demand of the ESS and the SOC (State Of Charge) of the ESS.

According to an embodiment, a residential power load; an external power supply supplying power to the residential power load by a power sales operator; a hydrogen fuel cell power generation unit that generates electricity using hydrogen as a raw material; ESS responsible for storing the electric power produced by the hydrogen fuel cell power generation unit and supplying electric power to the residential electric load; a database for storing power load information; Calculate the expected daily load and the total expected load for the target period using the power load information of the same period in the past, and compare the unit price of the hydrogen fuel cell power generation unit with the charge for each section of the external power supply for the total expected load. a calculation unit for calculating a power generation schedule of the hydrogen fuel cell power generation unit and a charge/discharge schedule of the ESS for the target period; and a control unit for controlling the hydrogen fuel cell power generation unit and the ESS according to the power generation schedule of the hydrogen fuel cell power generation unit and the charging/discharging schedule of the ESS.

The calculation unit compares the fee for each section with the power generation unit price for each section and distributes the total expected load according to the power supply source so that the cost is minimized to calculate the total power supply and demand of the external power supply and the total power supply and demand of the ESS there is.

The fee for each section is set according to the electricity tariff table of Korea Electric Power Corporation, and the power generation unit price may be set in advance by the user.

The calculation unit may calculate the daily power supply and demand of the external power supply and the daily power supply and demand of the ESS with respect to the expected daily load according to the ratio of the total power supply and demand of the external power supply to the total power supply and demand of the ESS.

The calculation unit may adjust the daily power supply/demand amount of the external power supply source and the daily power supply/demand amount of the ESS in consideration of the total storage capacity of the ESS.

The calculation unit may calculate the power generation schedule of the hydrogen fuel cell power generation unit and the charging/discharging schedule of the ESS by using the daily power supply and demand of the ESS and the SOC (State Of Charge) of the ESS.

According to an embodiment, calculating, by an operation unit, a daily expected load and a total expected load for a target period by using the power load information of the same period in the past stored in a database; The calculation unit compares the generation unit price of the hydrogen fuel cell power generation unit with the section rate of the external power supply for the total expected load to calculate the generation schedule of the hydrogen fuel cell power generation unit and the charge/discharge schedule of the ESS for the target period step; and a control unit controlling the hydrogen fuel cell power generation unit and the ESS according to the power generation schedule of the hydrogen fuel cell power generation unit and the charging/discharging schedule of the ESS.

Calculating the power generation schedule of the hydrogen fuel cell power generation unit for the target period and the charging/discharging schedule of the ESS for the target period includes comparing the charge for each section with the power generation unit price for each section, so as to minimize the cost, the total expected load is used as a power supply distributing according to and calculating the total power supply and demand of the external power supply and the total power supply and demand of the ESS. Calculating the daily power supply/demand amount of the external power supply source and the daily power supply/demand amount of the ESS with respect to the expected daily load amount according to the ratio of the total power supply quantity of the external power supply source to the total power supply quantity of the ESS; adjusting the daily power supply and demand of the external power supply and the daily power supply and demand of the ESS in consideration of the total storage capacity of the ESS; and calculating a power generation schedule of the hydrogen fuel cell power generation unit and a charge/discharge schedule of the ESS using the daily power supply and demand of the ESS and the state of charge (SOC) of the ESS.

According to the embodiment, there is provided a computer-readable recording medium in which a program for executing the above-described power supply method in a computer is recorded.

The present invention power supply device, system and power supply method minimize the influence on the variable central grid rate plan, and can supply power at an optimal cost.

In addition, it is possible to expand the use of renewable energy and reduce the load on the central grid.

In addition, through this, it is possible to increase the economic benefit of the final energy consumer.

1 is a conceptual diagram of a power supply system according to an embodiment.
2 is a configuration block diagram of a power supply apparatus according to an embodiment.
3 is a flowchart of a power supply method according to an embodiment.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

However, the technical spirit of the present invention is not limited to some embodiments described, but may be implemented in various different forms, and within the scope of the technical spirit of the present invention, one or more of the components may be selected between the embodiments. It can be used by combining or substituted with .

In addition, terms (including technical and scientific terms) used in the embodiments of the present invention may be generally understood by those of ordinary skill in the art to which the present invention belongs, unless specifically defined and described explicitly. It may be interpreted as a meaning, and generally used terms such as terms defined in advance may be interpreted in consideration of the contextual meaning of the related art.

In addition, the terminology used in the embodiments of the present invention is for describing the embodiments and is not intended to limit the present invention.

In the present specification, the singular form may also include the plural form unless otherwise specified in the phrase, and when it is described as "at least one (or more than one) of A and (and) B, C", it is combined as A, B, C It may include one or more of all possible combinations.

In addition, in describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used.

These terms are only for distinguishing the component from other components, and are not limited to the essence, order, or order of the component by the term.

And, when it is described that a component is 'connected', 'coupled' or 'connected' to another component, the component is not only directly connected, coupled or connected to the other component, but also with the component It may also include a case of 'connected', 'coupled' or 'connected' due to another element between the other elements.

In addition, when it is described as being formed or disposed on "above (above) or under (below)" of each component, top (above) or under (below) is one as well as when two components are in direct contact with each other. Also includes a case in which another component as described above is formed or disposed between two components. In addition, when expressed as "upper (upper) or lower (lower)", the meaning of not only an upper direction but also a lower direction based on one component may be included.

Hereinafter, the embodiment will be described in detail with reference to the accompanying drawings, but the same or corresponding components are given the same reference numerals regardless of reference numerals, and overlapping descriptions thereof will be omitted.

1 is a conceptual diagram of a power supply system according to an embodiment.

Referring to FIG. 1 , a power supply system 1 according to an embodiment may include a power supply device 10 , a house power load 20 , and an external power supply source 30 .

The home power load 20 may receive power from the external power supply 30 and the power supply device 10 .

The external power supply 30 may supply power to the home power load 20 by a power sales operator. In an embodiment, the external power supply 30 may refer to a central power grid that is a power distribution network that supplies power by Korea Electric Power.

In an embodiment, the rate for each section is set according to the electricity rate table of Korea Electric Power Corporation, and the unit price of power generation may be set in advance by the user.

The electricity rate system in Korea is divided into residential, general, educational, and industrial use according to the use of electricity, and is applied differentially. A progressive system is applied to residential electricity rates, and since December 2016, it is divided into three levels: 0~200kWh (Level1), 201~400kWh (Level2), and over 401kh (Level3). In the case of general, educational, and industrial electricity rates, a differential rate system is applied by season and time, and high rates are applied during the seasons (summer, winter) and time of year when the highest demand occurs.

The power generation unit price is a price set by the user and may be determined in advance in consideration of the cost of hydrogen raw materials and the operating power of the hydrogen fuel cell power generation unit. The power generation unit price may be changed according to a user's setting.

2 is a configuration block diagram of a power supply apparatus according to an embodiment. 1 and 2, the power supply device 10 according to the embodiment includes a hydrogen fuel cell power generation unit 11, an ESS (Energy Storage System) 12, a database 13, an operation unit 14, and A control unit 15 may be included.

The hydrogen fuel cell power generation unit 11 may generate electricity using hydrogen as a raw material. The hydrogen fuel cell power generation unit 11 may include a hydrogen tank (not shown) and a power generation unit (not shown).

The hydrogen tank may store hydrogen, and may supply hydrogen under the control of the power generation unit. The hydrogen tank may be made of a material such as an alloy of magnesium and nickel, high-strength carbon fiber-reinforced plastic, glass fiber-reinforced plastic, or urethane.

The power generation unit controls storage and supply of hydrogen in the hydrogen tank, and may generate electric power using hydrogen provided from the hydrogen tank. The power generation unit may be a fuel cell power generation system. The fuel cell power generation system may generate electric energy by electrochemically reacting fuel with an oxidizing agent. This chemical reaction is carried out by a catalyst in the catalyst layer, and in general, as long as fuel is continuously supplied, continuous power generation is possible. In an embodiment, the power generation unit may perform power generation by using hydrogen in the hydrogen tank as a fuel. Therefore, as long as hydrogen is supplied from the hydrogen tank, continuous power generation is possible semi-permanently. The power generation unit may be physically and electrically connected to the hydrogen tank to detect the amount of hydrogen stored in the hydrogen tank, and may receive hydrogen from the hydrogen tank.

The ESS 12 may be responsible for storing the electric power produced by the hydrogen fuel cell power generation unit 11 and supplying electric power to the load.

The ESS 12 may control charging and discharging of power generated by the hydrogen fuel cell power generation unit 11 .

The ESS 12 is electrically connected to the hydrogen fuel cell power generation unit 11 , and has a built-in processor to control data processing, charging and discharging of the battery and the hydrogen fuel cell power generation unit 11 .

The ESS 12 may include a secondary battery or capacitor capable of charging and discharging, and is responsible for supplying power to an associated load. The battery of the ESS 12 may consist of numerous cells. Cells are gathered to form a module, modules are gathered to form a pack, and when packs are gathered, they constitute a rack. Finally, the battery of the ESS 12 may mean a system in which several racks are gathered.

The ESS 12 and the hydrogen fuel cell power generation unit 11 can transmit power through a power line and perform data communication through a communication method through the power line.

In order for the power supply system according to the embodiment to be applied to a house, an electric power use contract between KEPCO and a house manager must be premised. In addition, the capacity of the ESS must be able to cover the maximum peak load (instantaneous power) of the entire housing consumer for a certain period of time. In addition, the ESS must be able to operate independently (Grid Isolated), and a meter or multi-function terminal device capable of measuring and storing individual wattage must be installed for each housing customer.

The database 13 may store power load amount information. The database 13 is a flash memory type (Flash Memory Type), a hard disk type (Hard Disk Type), a multimedia card micro type (Multimedia Card Micro Type), a card type memory (eg, SD or XD memory, etc.) ), magnetic memory, magnetic disk, optical disk, RAM (Random AccESS(12) Memory: RAM), SRAM (Static Random AccESS(12) Memory), ROM (Read-Only Memory: ROM), EEPROM (Electrically Erasable Programmable Read- Only memory) and PROM (Programmable Read-Only Memory) may include at least one storage medium. In addition, a web storage that performs a storage function of the database 13 on the Internet may be operated, or may be operated in connection with the web storage. In addition, the database 13 may store data and programs necessary for the system to operate.

The calculating unit 14 calculates the expected daily load and the total expected load for the target period by using the power load information of the same period in the past, and the unit price of generation of the hydrogen fuel cell power generation unit and the section rate of the external power supply for the total expected load can be compared to calculate the power generation schedule of the hydrogen fuel cell power generation unit and the charge/discharge schedule of the ESS for the target period.

The calculator 14 may search the database 13 for power load information for the same past period and calculate the expected daily load and the total expected load for the target period. In an embodiment, the expected daily load may mean a daily load that is expected to be consumed by the residential power load during the target period. In an embodiment, the total expected load may mean a total load that is expected to be consumed by the residential power load during the target period.

The target period may mean an arbitrary period set by a user.

The calculation unit 14 searches for power load information corresponding to the same month and day as the target period among the power load information stored in the database 13, and uses data obtained by averaging the power load information for a predetermined year as the load amount during the target period. can be calculated as

Table 1 above shows the expected daily load and the total expected load for the target period according to the embodiment. The calculation unit 14 searches the database 13 for power load information corresponding to the target period from March 1 to March 31, and then averages the power load information for a predetermined year, and the load amount for the target period can be calculated as For example, in order to calculate the expected load from March 1 to March 31, 2020, the calculating unit 14 calculates the power load from March 1, 2015 to March 31, and March 1, 2016. Electricity load from day to March 31, Electric load from March 1 to March 31, 2017 Electric load from March 1 to March 31, 2018 From March 1, 2019 The amount of power load up to March 31 can be retrieved from the database 13 . The calculating unit 14 may calculate an expected daily load and a total expected load for the target period by averaging the searched power loads. For example, in Table 1, the expected daily load for March 1 may mean the average value of the power load for March 1, respectively, from 2015 to 2019. The calculator 14 may calculate the sum of the expected daily loads as the total expected loads.

The calculating unit 14 may calculate the total power supply and demand of the external power source and the total power supply and demand of the ESS by distributing the total expected load according to the power supply source so that the cost is minimized by comparing the fee for each section with the power generation unit price for each section. The calculation unit 14 may allocate the total expected load by substituting the fee for each section. The calculation unit 14 may calculate a portion in which the charge for each section is less than the unit price of generation among the total estimated loads distributed as the total amount of power supply from the external power supply source. The calculation unit 14 may calculate a portion in which the charge for each section exceeds the unit price of generation among the total estimated load allocated to the total amount of power supply and demand of the ESS. When the rate for each section and the generation unit price are the same, the calculation method may be determined according to a user's preset setting.

In Table 2 above, the unit price of power generation is set at 120 won/Kwh, and the unit price of power generation by section is set according to the electricity tariff table of Korea Electric Power Corporation. The total expected load is 520.0 kWh according to the values calculated in Table 1.

In Table 2, the calculation unit 14 calculates 200 kWh, which is a part of the total expected load, as the total power supply amount of the external power supply source for the section 200 kWh or less in which the rate for each section is less than the power generation unit price. The calculation unit 14 calculates the remaining 320 kWh of the total expected load as the total power supply and demand of the ESS for the section in which the rate for each section exceeds the generation unit price of 200 kWh.

The calculator 14 may calculate the daily power supply/demand amount of the external power supply source and the daily power supply/demand amount of the ESS with respect to the expected daily load amount according to the ratio of the total power supply quantity of the external power supply source to the total power supply quantity of the ESS. The calculator 14 may distribute the daily power supply and demand according to a ratio of the total power supply and demand of the external power supply source and the total power supply and demand of the ESS.

In this case, the calculating unit 14 may adjust the daily power supply and demand of the external power supply and the daily power supply and demand of the ESS in consideration of the total storage capacity of the ESS. The total storage capacity is a value set according to the battery capacity of the ESS, and may mean the maximum battery capacity or a value set in advance in consideration of the average power consumption of the residential power load.

In Table 3, the calculator 14 distributed the daily power supply and demand according to the ratio of the total power supply and demand of the external power supply and the total power supply and demand of the ESS calculated in Table 2. That is, according to Table 2, if the ratio of the total power supply and demand of the ESS to the total power supply and demand of the external power source is 1.6:1, the calculating unit 14 calculates the expected load for each day as the total supply and demand of the ESS and the total power supply and demand of the external power supply. By distributing according to the ratio of

The calculating unit 14 may distribute the daily power supply and demand for days exceeding the total storage capacity of the ESS among the daily power supply and demand of the ESS to days having a relatively small value.

Referring to Tables 3 and 4, it can be seen that the daily power supply and demand of the ESS on March 6 and March 7 exceeds the total storage capacity of the ESS by 15 kWh. It can be seen that the calculator 14 disperses the daily power supply and demand for March 6 and March 7 to March 1 to March 5 having relatively small daily power supply and demand. The calculator 14 may adjust the daily power supply and demand of the external power supply from March 1 to March 7 in consideration of the fluctuation value of the daily power supply and demand of the ESS.

The calculation unit 14 may calculate the power generation schedule of the hydrogen fuel cell power generation unit and the charging/discharging schedule of the ESS by using the daily power supply and demand of the ESS and the SOC (State Of Charge) of the ESS.

The calculating unit 14 may calculate the required charging time of the ESS in consideration of the amount of power charged in the ESS and the daily power supply and demand of the ESS.

Referring to Table 5 above, the SOC of the ESS is 0% as of March 1, and the charging start time is set to 01:00. The calculator 14 may calculate the required charging time of the ESS by checking the power supply and demand for each ESS day and the SOC for each day. The calculating unit 14 may calculate the power generation schedule of the hydrogen fuel cell power generation unit by using the required charging time of the ESS. In addition, the calculator 14 may calculate the charge/discharge schedule of the ESS by using the daily power supply and demand of the ESS.

The control unit 15 may control the hydrogen fuel cell power generation unit and the ESS according to the power generation schedule of the hydrogen fuel cell power generation unit and the charge/discharge schedule of the ESS.

The operation unit 14 and the control unit 15 may be configured as a processor. The operation unit 14 and the control unit 15 may each be configured as a separate processor or as a single processor.

Table 6 is a rate estimate table when power is supplied using only an external power supply source, and Table 7 is a rate estimate table when the power supply system according to the embodiment is applied.

Comparing Tables 6 and 7, it can be seen that when the power supply system according to the embodiment is applied, the electricity bill for the total expected load of 520 kWh for one month can be saved by 32,852 won. In addition, it can contribute to the reduction of the load peak by reducing the burden on the external power supply network.

3 is a flowchart of a power supply method according to an embodiment.

Referring to FIG. 3 , first, the calculating unit calculates the expected daily load and the total expected load for the target period by using the power load information of the same past period stored in the database ( S301 ).

Next, the calculating unit compares the fee for each section with the power generation unit price for each section and distributes the total expected load according to the power supply source so that the cost is minimized ( S302 ).

Next, the calculating unit calculates the total power supply and demand of the external power supply and the total power supply and demand of the ESS (S303).

Next, the calculating unit calculates the daily power supply and demand of the external power supply and the daily power supply and demand of the ESS with respect to the expected daily load according to the ratio of the total power supply and demand of the external power supply to the total power supply of the ESS (S304).

Next, the calculation unit adjusts the daily power supply and demand of the external power supply and the daily power supply and demand of the ESS in consideration of the total storage capacity of the ESS (S305).

Next, the calculation unit calculates the power generation schedule of the hydrogen fuel cell power generation unit and the charge/discharge schedule of the ESS by using the daily power supply and demand of the ESS and the SOC (State Of Charge) of the ESS (S306).

Next, the control unit controls the hydrogen fuel cell power generation unit and the ESS according to the power generation schedule of the hydrogen fuel cell power generation unit and the charge/discharge schedule of the ESS (S307).

The method according to the embodiment may be implemented in the form of program instructions that can be executed through various computer means and recorded in a computer-readable recording medium. In this case, the medium may be to continuously store a program executable by a computer, or to temporarily store it for execution or download. In addition, the medium may be various recording means or storage means in the form of a single or several hardware combined, it is not limited to a medium directly connected to any computer system, and may exist distributed over a network. Examples of the medium include a hard disk, a magnetic medium such as a floppy disk and a magnetic tape, an optical recording medium such as CD-ROM and DVD, a magneto-optical medium such as a floppy disk, and those configured to store program instructions, including ROM, RAM, flash memory, and the like. In addition, examples of other media include an app store that distributes applications, and a recording medium or storage medium managed by a site or server that supplies or distributes other various software.

The term '~ unit' used in this embodiment means software or hardware components such as field-programmable gate array (FPGA) or ASIC, and '~ unit' performs certain roles. However, '-part' is not limited to software or hardware. '~' may be configured to reside on an addressable storage medium or may be configured to refresh one or more processors. Accordingly, as an example, '~' indicates components such as software components, object-oriented software components, class components, and task components, and processes, functions, properties, and procedures. , subroutines, segments of program code, drivers, firmware, microcode, circuitry, data, databases, data structures, tables, arrays, and variables. The functions provided in the components and '~ units' may be combined into a smaller number of components and '~ units' or further separated into additional components and '~ units'. In addition, components and '~ units' may be implemented to play one or more CPUs in a device or secure multimedia card.

Although the above has been described with reference to preferred embodiments of the present invention, those skilled in the art can variously modify and change the present invention within the scope without departing from the spirit and scope of the present invention as set forth in the claims below. You will understand that it can be done.

10: power supply
11: Hydrogen fuel cell power generation unit
12: ESS
13: Database
14: arithmetic unit
15: control unit

Claims (15)

a hydrogen fuel cell power generation unit that generates electricity using hydrogen as a raw material;
an ESS responsible for storing power produced by the hydrogen fuel cell power generation unit and supplying power to a load;
a database for storing power load information;
Calculate the expected daily load and total expected load for the target period using the power load information of the same period in the past, and compare the unit price of the hydrogen fuel cell power generation unit with the charge for each section of the external power supply for the total expected load. a calculation unit for calculating a power generation schedule of the hydrogen fuel cell power generation unit and a charge/discharge schedule of the ESS for the target period; and
a control unit for controlling the hydrogen fuel cell power generation unit and the ESS according to the power generation schedule of the hydrogen fuel cell power generation unit and the charging/discharging schedule of the ESS,
The calculation unit compares the fee for each section with the generation unit price for each section, distributes the total expected load according to the power supply source so that the cost is minimized, calculates the ratio of the total power supply and demand of the ESS to the total power supply amount of the external power source, and the external power A power supply device that distributes the daily power supply and demand of the external power source and the daily power supply and demand of the ESS to the expected daily load according to the ratio of the total power supply and demand of the ESS to the total power supply and demand of the supply source.
delete According to claim 1,
The fee for each section is set according to the electricity tariff table of Korea Electric Power Corporation, and the power generation unit price is set in advance by a user.
delete According to claim 1,
The calculating unit is a power supply device that adjusts the daily power supply and demand of the external power supply and the daily power supply and demand of the ESS in consideration of the total storage capacity of the ESS.
6. The method of claim 5,
The calculation unit is a power supply device for calculating the power generation schedule of the hydrogen fuel cell power generation unit and the charge/discharge schedule of the ESS by using the daily power supply and demand amount of the ESS and the SOC (State Of Charge) of the ESS.
power loads for homes;
an external power supply source for supplying power to the residential power load by a power sales operator;
a hydrogen fuel cell power generation unit that generates electricity using hydrogen as a raw material;
ESS responsible for storing the electric power produced by the hydrogen fuel cell power generation unit and supplying electric power to the residential electric power load;
a database for storing power load information;
Calculate the expected daily load and total expected load for the target period using the power load information of the same period in the past, and compare the unit price of the hydrogen fuel cell power generation unit with the charge for each section of the external power supply for the total expected load. a calculation unit for calculating a power generation schedule of the hydrogen fuel cell power generation unit and a charge/discharge schedule of the ESS for the target period; and
a control unit for controlling the hydrogen fuel cell power generation unit and the ESS according to the power generation schedule of the hydrogen fuel cell power generation unit and the charging/discharging schedule of the ESS,
The calculation unit compares the fee for each section with the generation unit price for each section, distributes the total expected load according to the power supply source so that the cost is minimized, calculates the ratio of the total power supply and demand of the ESS to the total power supply amount of the external power source, and the external power A power supply system that distributes the daily power supply and demand of the external power source and the daily power supply and demand of the ESS to the expected daily load according to the ratio of the total power supply and demand of the ESS to the total power supply and demand of the supply source.
delete 8. The method of claim 7,
The fee for each section is set according to the electricity tariff table of Korea Electric Power Corporation, and the power generation unit price is set in advance by the user.
delete 8. The method of claim 7,
The calculation unit is a power supply system that adjusts the daily power supply and demand of the external power supply and the daily power supply and demand of the ESS in consideration of the total storage capacity of the ESS.
12. The method of claim 11,
The calculation unit is a power supply system for calculating the power generation schedule of the hydrogen fuel cell power generation unit and the charge/discharge schedule of the ESS by using the daily power supply and demand amount of the ESS and the SOC (State Of Charge) of the ESS.
calculating, by the calculator, a daily expected load and a total expected load for a target period by using the power load information of the same past period stored in a database;
Comparing the generation unit price of the hydrogen fuel cell power generation unit with the section rate of the external power supply for the total expected load by the calculating unit, calculating the generation schedule of the hydrogen fuel cell power generation unit and the charging/discharging schedule of the ESS for the target period ; and
A control unit controlling the hydrogen fuel cell power generation unit and the ESS according to the power generation schedule of the hydrogen fuel cell power generation unit and the charging/discharging schedule of the ESS,
Calculating the power generation schedule of the hydrogen fuel cell power generation unit and the charge/discharge schedule of the ESS for the target period includes:
The total expected load is distributed according to the power supply source so that the cost is minimized by comparing the fee for each section with the power generation unit price for each section, and the ratio of the total power supply and demand of the ESS to the total power supply of the external power supply is calculated, and the total A power supply method comprising the step of distributing a daily power supply and demand amount of an external power source and a daily power supply amount of the ESS for the expected daily load amount according to a ratio of the total power supply quantity of the ESS to the electricity supply quantity.
delete A computer-readable recording medium in which a program for causing a computer to execute the power supply method of claim 13 is recorded.

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