WO2025018752A1 - 에너지 저장 시스템의 운영 지원 장치 및 방법 - Google Patents
에너지 저장 시스템의 운영 지원 장치 및 방법 Download PDFInfo
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- WO2025018752A1 WO2025018752A1 PCT/KR2024/010138 KR2024010138W WO2025018752A1 WO 2025018752 A1 WO2025018752 A1 WO 2025018752A1 KR 2024010138 W KR2024010138 W KR 2024010138W WO 2025018752 A1 WO2025018752 A1 WO 2025018752A1
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- energy storage
- storage system
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for AC mains or AC distribution networks
- H02J3/28—Arrangements for balancing of the load in networks by storage of energy
- H02J3/32—Arrangements for balancing of the load in networks by storage of energy using batteries or super capacitors with converting means
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q10/00—Administration; Management
- G06Q10/06—Resources, workflows, human or project management; Enterprise or organisation planning; Enterprise or organisation modelling
- G06Q10/063—Operations research, analysis or management
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q30/00—Commerce
- G06Q30/02—Marketing; Price estimation or determination; Fundraising
- G06Q30/0201—Market modelling; Market analysis; Collecting market data
- G06Q30/0206—Price or cost determination based on market factors
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q50/00—Information and communication technology [ICT] specially adapted for implementation of business processes of specific business sectors, e.g. utilities or tourism
- G06Q50/06—Energy or water supply
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for AC mains or AC distribution networks
- H02J3/38—Arrangements for feeding a single network from two or more generators or sources in parallel; Arrangements for feeding already energised networks from additional generators or sources in parallel
- H02J3/381—Dispersed generators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
- H02J7/90—Regulation of charging or discharging current or voltage
- H02J7/92—Regulation of charging or discharging current or voltage with prioritisation of loads or sources
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S50/00—Market activities related to the operation of systems integrating technologies related to power network operation or related to communication or information technologies
- Y04S50/10—Energy trading, including energy flowing from end-user application to grid
Definitions
- the present invention relates to an operation support device and method for an energy storage system, and more specifically, to an operation support device and method for an energy storage system that helps minimize the operation cost of an energy storage system.
- Energy Storage System is used in the form of operating a battery that stores energy in conjunction with renewable energy and power grids.
- ESS Energy Storage System
- the demand for energy storage systems is increasing for power supply and demand control and power quality improvement.
- the output and capacity of the energy storage system may vary, and multiple battery systems may be connected to each other to form a large-capacity energy storage system.
- PV-linked ESS is configured to appropriately distribute power supplied from the power grid and power produced by the PV system to supply to the load, and store the remaining power in a battery system.
- the most important goal that users of ESS consider is to minimize the operating cost of ESS.
- the user burden cost incurred during the operation of ESS consists of the purchase cost of grid power that must be paid at regular intervals and the battery replacement cost incurred at each battery replacement period.
- ESS is controlled by considering various factors such as the power generation of PV system, the power demand of load, and the state of charge of the battery.
- conventional technologies focus on the control method of ESS to improve power efficiency or battery performance, and have limitations in minimizing the user burden cost from the perspective of long-term operation of ESS.
- the purpose of the present invention to solve the above problems is to provide an operation support device for an energy storage system that helps minimize the operating cost of the energy storage system.
- Another object of the present invention to solve the above problems is to provide an operation support method using such an operation support device.
- an operation support device is an operation support device of an energy storage system, which may include at least one processor and a memory storing at least one command executed through the at least one processor.
- the at least one command may include: a command for collecting information about batteries and inverters applicable to the energy storage system; a command for deriving a plurality of combinations, each combination comprising one or more batteries and an inverter, based on a structure of the energy storage system; a command for calculating an operating cost of the energy storage system for each of the combinations; and a command for generating recommended combination information including information about a combination exhibiting the lowest operating cost among the combinations.
- the command for collecting information about the battery and inverter may include a command for collecting one or more of the following: a model name, a capacity, a critical SOC range, and a purchase cost for each battery; and a model name, a limit output, and a purchase cost for each inverter.
- the command for deriving the plurality of combinations may include a command for deriving a range of the number of batteries based on the capacity of the batteries and the limit output of the inverter; and a command for deriving a plurality of combinations applicable to the energy storage system based on the range of the number of batteries and the design structure of the battery system.
- the command for calculating the operating cost of the energy storage system may include a command for calculating, for each of the combinations, a grid power purchase cost and a battery and inverter purchase cost; and a command for calculating the operating cost based on the grid power purchase cost and the battery and inverter purchase cost.
- the command for calculating the operating cost of the energy storage system may include a command for calculating a grid power purchase cost for a preset period for each of the combinations based on past history information about at least one of the energy storage system, a load coupled with the energy storage system, and a power generation device coupled with the energy storage system.
- the command for calculating the above-described system power purchase cost may include: a command for collecting information on the power consumption status of the load and information on the power production status of the power generation device; a command for deriving an operation schedule including a time-interval charge/discharge amount that minimizes the system power purchase cost by using an objective function defined as the system power purchase cost; and a command for calculating the system power purchase cost for a preset period for each of the combinations by applying the operation schedule and the system power cost information to an energy storage system according to each of the combinations.
- the objective function may be defined with constraints including at least one of a first condition regarding the balance of power supply and power consumption, a second condition regarding the state of charge (SOC) according to the charge/discharge efficiency of the battery, a third condition regarding the limit charge amount of the battery, a fourth condition regarding the limit output of the inverter, and a fifth condition regarding the binarization of the charge state and the discharge state.
- constraints including at least one of a first condition regarding the balance of power supply and power consumption, a second condition regarding the state of charge (SOC) according to the charge/discharge efficiency of the battery, a third condition regarding the limit charge amount of the battery, a fourth condition regarding the limit output of the inverter, and a fifth condition regarding the binarization of the charge state and the discharge state.
- the at least one command may further include a command for providing the generated recommended combination information to a user terminal linked with the energy storage system.
- the recommended combination information may include one or more of the number of batteries applied to the energy storage system, the connection structure of the batteries, and the model name of the inverter.
- an operation support method may include a step of collecting information on a battery and an inverter applicable to the energy storage system, a step of deriving a plurality of combinations, each combination including one or more batteries and an inverter, based on a structure of the energy storage system, a step of calculating an operation cost of the energy storage system for each of the combinations, and a step of generating recommended combination information including information on a combination exhibiting the minimum operation cost among the combinations.
- the step of collecting information about the battery and inverter may include a step of collecting at least one of a model name, a capacity, a critical SOC range, and a purchase cost for each battery, and a model name, a limit output, and a purchase cost for each inverter.
- the step of deriving the plurality of combinations may include a step of deriving a range of the number of batteries based on the capacity of the battery and the limit output of the inverter; and a step of deriving a plurality of combinations applicable to the energy storage system based on the range of the number of batteries and the design structure of the battery system.
- the step of calculating the operating cost of the energy storage system may include the step of calculating, for each of the combinations, a grid power purchase cost and a battery and inverter purchase cost; and the step of calculating the operating cost based on the grid power purchase cost and the battery and inverter purchase cost.
- the step of calculating the operating cost of the energy storage system may include a step of calculating a grid power purchase cost for a preset period for each of the combinations based on past history information about at least one of the energy storage system, a load interconnected with the energy storage system, and a power generation device interconnected with the energy storage system.
- the step of calculating the system power purchase cost may include: a step of collecting information on the power consumption status of the load and information on the power production status of the power generation device; a step of deriving an operation schedule including the amount of charge and discharge for each time interval that minimizes the purchase cost of the system power by using an objective function defined as the purchase cost of the system power; and a step of calculating the system power purchase cost for a preset period for each of the combinations by applying the operation schedule and the system power cost information to an energy storage system according to each of the combinations.
- the objective function may be defined with constraints including at least one of a first condition regarding the balance of power supply and power consumption, a second condition regarding the state of charge (SOC) according to the charge/discharge efficiency of the battery, a third condition regarding the limit charge amount of the battery, a fourth condition regarding the limit output of the inverter, and a fifth condition regarding the binarization of the charge state and the discharge state.
- constraints including at least one of a first condition regarding the balance of power supply and power consumption, a second condition regarding the state of charge (SOC) according to the charge/discharge efficiency of the battery, a third condition regarding the limit charge amount of the battery, a fourth condition regarding the limit output of the inverter, and a fifth condition regarding the binarization of the charge state and the discharge state.
- the above operation support method may further include a command for providing the generated recommended combination information to a user terminal linked with the energy storage system.
- the recommended combination information may include one or more of the number of batteries applied to the energy storage system, the connection structure of the batteries, and the model name of the inverter.
- FIG. 1 is a block diagram of an energy storage system to which the present invention can be applied.
- Figure 2 shows an implementation example of an energy storage system to which the present invention can be applied.
- FIG. 3 is a flowchart of a method for supporting operation of an energy storage system according to an embodiment of the present invention.
- Figure 4 is a reference table for explaining battery information and inverter information according to an embodiment of the present invention.
- FIG. 5 is a reference table for explaining a method for deriving battery-inverter combinations according to an embodiment of the present invention.
- Figure 6 is a reference table for explaining a method for deriving an optimal combination according to an embodiment of the present invention.
- Figure 7 is a block diagram of an operation support device of an energy storage system according to an embodiment of the present invention.
- first, second, A, B, etc. may be used to describe various components, the components should not be limited by the terms. The terms are only used to distinguish one component from another.
- first component could be referred to as the second component, and similarly, the second component could also be referred to as the first component.
- the term "and/or" includes any combination of a plurality of related listed items or any item among a plurality of related listed items.
- SOC State of Charge
- SOH State of Health
- Power Limit refers to the output power limit that is set in advance by the battery manufacturer according to the battery condition or set according to the SOC.
- the power limit can be divided into a charge power limit and a discharge power limit depending on whether it is charging or discharging.
- FIG. 1 is a block diagram of an energy storage system to which the present invention can be applied.
- the energy storage system (100) is electrically connected to a power generation device (300) and a power system (400), and can receive power from the power generation device (300) and the power system (400) and store it internally.
- the energy storage system (100) is electrically connected to a load (200) and can supply power stored therein to the load (200). Meanwhile, the load (200) is electrically connected to a power generation device (300) and a power system (400) and can receive power from the power generation device (300) and the power system (400).
- the power generation device (300) is a device that generates power using a power generation device, and may be configured to include at least one of a power generation device using solar energy, solar heat, wind energy, and geothermal energy. Meanwhile, since the type of the power generation device (300) is not an essential component of the present invention, the scope of the present invention is not limited to these entities.
- the energy storage system (100) may be configured to be connected to a user terminal (600) through a network and to transmit and receive data to and from each other.
- a user terminal (600) may be configured to be connected to a home energy management system (HEMS), which is the top-level control system of the home ESS, through a network and to transmit and receive data to and from each other.
- HEMS home energy management system
- the user terminal (600) is a computing device used by the owner or manager of the energy storage system (100), and may correspond to, for example, a personal computer (PC), a mobile phone, or a tablet PC.
- PC personal computer
- mobile phone or a tablet PC.
- the energy storage system (100) can transmit information about one or more of the operating status of the energy storage system (100), the power generation status of the power generation device (300), and the power consumption status of the load (200) to the user terminal (600).
- the user terminal (600) can be configured to output the received information through a predefined GUI (Graphical User Interface).
- the user terminal (600) may be configured to transmit a selection signal input by the user to the energy storage system (100), and the energy storage system (100) may be configured to perform a control operation corresponding to the selection signal. For example, when an off request signal for a specific load is received through the user terminal (600), the EMS of the energy storage system (100) may block the electric path for the load, thereby blocking the power supply to the load.
- the operation support device (500) may be configured to be connected to the energy storage system (100) through a network and to mutually transmit and receive data.
- the operation support device (500) may be configured to be connected to at least one of the power generation device (300) and the user terminal (600) through a network and to mutually transmit and receive data.
- the operation support device (500) may be configured and included within the energy storage system (100), or may be separately provided outside the energy storage system (100).
- the operation support device (500) may be implemented and included in the HEMS of a residential ESS, or may be implemented and included in the server of an ESS management company.
- the operation support device (500) can collect information about batteries and inverters applicable to the energy storage system (100) and generate recommended combination information of batteries and inverters that can minimize the operating cost of the energy storage system.
- the operation support device (500) can provide the generated recommended combination information to at least one of the energy storage system (100) and the user terminal (600). Meanwhile, details on a method for generating recommended combination information will be described later.
- the operation support device (500) can monitor one or more of the operating status of the energy storage system (100), the power generation status of the power generation device (300), and the power consumption status of the load (200), and can establish an operation schedule that can minimize the power purchase cost of the energy storage system (100).
- the operation schedule can include the charge and discharge amount of the battery for each time period.
- the operation support device (500) can transmit the established operation schedule to the battery charge and discharge control device of the energy storage system (100), thereby allowing the battery of the energy storage system (100) to be charged and discharged according to the operation schedule.
- Figure 2 shows an implementation example of an energy storage system to which the present invention can be applied.
- the energy storage system (100) may be configured to include a battery (110) that stores power, an inverter (120) that controls the charging and discharging operation of the battery (110), an EMS (130) that integrates and manages the configurations of the energy storage system and power devices linked to the energy storage system.
- the battery (110) that performs the role of storing power can be implemented in a form in which a plurality of battery packs constitute a battery rack, and a plurality of battery racks constitute a battery bank.
- the battery pack may also be referred to as a battery module.
- a battery management system can be installed on each battery.
- the BMS can monitor the current, voltage, and temperature of each battery rack (or pack) it manages, calculate the SOC (Status Of Charge) based on the monitoring results, and control charging and discharging.
- SOC Status Of Charge
- the inverter (120) is also referred to as a power conditioning system (PCS) or a power conversion system (PCS), and can control power supplied to the battery from the outside and power supplied from the battery to the outside.
- PCS power conditioning system
- PCS power conversion system
- the inverter (120) may include a power management system (PMS), and the operation support device (500) may be configured to be linked with the power management system of the inverter (120) to mutually transmit and receive data.
- PMS power management system
- the operation support device (500) may be configured to be linked with the power management system of the inverter (120) to mutually transmit and receive data.
- the inverter (120) can control the charging and discharging operation of the battery (110) according to the operating schedule by the operating support device (500). For example, the inverter (120) can receive an operating schedule for a specific day from the operating support device (500) and control the charging and discharging operation of the battery (110) according to the reference power for each time section included in the operating schedule.
- EMS 130
- EMS can be linked to loads, power generation devices, and inverters, and monitor and control linked components.
- the PV system may be configured to include a PV module (310) (e.g., a solar panel) and a PV inverter (320) which is an AC/DC inverter, and the AC terminal of the PV inverter (320) and the AC terminal of the inverter (120) of the energy storage system may be connected to an AC link.
- a PV module e.g., a solar panel
- a PV inverter 320
- AC/DC inverter AC/DC inverter
- the load may be configured to include a general load (210) inside a house and an EV charging station (220).
- the EV charging station (220) is a system for charging electric vehicles and may be configured to receive power for charging electric vehicles from an AC link.
- the energy storage system illustrated in Fig. 2 is an AC coupled ESS in which a PV system, a load, and an energy storage system are connected on an AC link.
- the operation support device (500) can collect basic information for generating recommended combination information by linking with one or more of the inverter (120), PV inverter (320), and EMS (130).
- the present invention can also be applied to a DC coupled ESS in which the output terminal of the PV system and the output terminal of the battery are connected on a DC link, and the DC link is connected to one terminal of the inverter.
- the operation support device (500) can collect basic information for generating recommended combination information by linking with at least one of the inverter (120) and the EMS (130).
- FIG. 3 is a flowchart of a method for supporting operation of an energy storage system according to an embodiment of the present invention.
- An operation support method of an energy storage system according to an embodiment of the present invention can be performed by an operation support device linked with the energy storage system.
- the operation support device can collect information about a battery and information about an inverter that can be applied to an energy storage system (S310).
- the operation support device can check battery information and inverter information from one or more of a storage device, an external storage device connected by an administrator, and a user terminal.
- the information about the battery may include one or more of a model name, a capacity, a critical SOC range, and a purchase cost for each of the one or more batteries.
- the information about the inverter may include one or more of a model name, a limit output, and a purchase cost for each of the one or more inverters.
- Figure 4 is a reference table for explaining battery information and inverter information according to an embodiment of the present invention.
- the operation support device can collect a battery list including a model name (or identifier), capacity, SOC lower limit, SOC upper limit, and purchase cost for each of a plurality of batteries that can be applied to the energy storage system.
- the operation support device can collect an inverter list including a model name (or identifier), capacity, battery voltage information, charge output limit, discharge output limit, and purchase cost for each of a plurality of inverters that can be applied to the energy storage system.
- the operation support device can receive model information of a battery system from an energy storage system or a user terminal, and determine a battery and inverter applicable to the energy storage system based on the received model information.
- the operation support device can derive a plurality of battery-inverter combinations based on the design structure of the energy storage system (S320).
- the battery-inverter combination can be composed of one or more batteries and an inverter.
- FIG. 5 is a reference table for explaining a method for deriving battery-inverter combinations according to an embodiment of the present invention.
- the operation support device can derive a total of 15 battery-inverter combinations (C #1 to #15), as illustrated in FIG. 5.
- the 15 combinations derived from the above example are [3 batteries, Inv #1], [3 batteries, Inv #2], [3 batteries, Inv #3], [3 batteries, Inv #4], [3 batteries, Inv #5], [4 batteries, Inv #1], [4 batteries, Inv #2], [4 batteries, Inv #3], [4 batteries, Inv #4], [4 batteries, Inv #5], [5 batteries, Inv #1], [5 batteries, Inv #2], [5 batteries, Inv #3], [5 batteries, Inv #4], and [5 batteries, Inv #5], as shown in FIG. 5.
- the operating support device can derive a range of the number of batteries applicable to the energy storage system based on the capacity of the batteries and the limit output of the inverter.
- the number of batteries can be determined in a range such that the total capacity by the combination of batteries exceeds the minimum guaranteed capacity of the energy storage system and is less than the limit capacity according to the limit output of the inverter.
- the operation support device can calculate the operating cost of the energy storage system for each of the combinations derived in S320 (S330).
- the operating cost of the energy storage system can be calculated based on the grid power purchase cost and the battery and inverter purchase cost.
- the operation support device can derive a combination that represents the minimum operation cost among the combinations (S340) and determine the combination as the optimal combination.
- Figure 6 is a reference table for explaining a method for deriving an optimal combination according to an embodiment of the present invention.
- the operation support device can calculate the power system purchase cost and the battery and inverter purchase cost for each of the 15 (C #1 to #15) battery-inverter combinations derived from S330. Thereafter, the operation support device can calculate the total operation cost for each of the battery-inverter combinations by adding the power system purchase cost and the battery and inverter purchase cost.
- the operation support device can determine [4 batteries, Inv #3] (C #8) showing the lowest total operation cost among the 15 combinations as the optimal combination.
- the operating cost of an energy storage system can be calculated in various ways depending on the needs.
- the operation support device can calculate a grid power purchase cost for a preset period of time for each of the combinations derived at S320 based on past history information for at least one of the energy storage system, the load, and the power generation device.
- the operation support device can receive past history information for a predetermined period of time from at least one of the user terminal (600), the EMS (130), the inverter (120), the EV station (220), and the PV inverter (320).
- the past history information may include one or more of power consumption status information of a load (e.g., power consumption per hour), power production status information of a power generation device (e.g., power production per hour), and charge/discharge schedule information of a battery (e.g., charge/discharge per hour).
- power consumption status information of a load e.g., power consumption per hour
- power production status information of a power generation device e.g., power production per hour
- charge/discharge schedule information of a battery e.g., charge/discharge per hour
- the operation support device can perform a simulation using past history information for energy storage systems to which batteries and inverters are applied according to each combination (C #1 to #15). Thereafter, the operation support device can calculate the system power purchase cost for a preset period (e.g., one month) for each combination based on the system power usage per hour and the system power cost per hour derived from the simulation results.
- a preset period e.g., one month
- the operation support device can derive an operation schedule (charge/discharge amount per unit time) of a battery that minimizes the purchase cost of grid power based on past history information on loads and power generation devices, and calculate the purchase cost of grid power using the derived operation schedule.
- an operation schedule charge/discharge amount per unit time
- the operation support device can collect information on the power production status and information on the power consumption status for a certain past period (e.g., for the past one year). Thereafter, the operation support device can derive an operation schedule for a certain period (e.g., one day) that minimizes the purchase cost of the system power by using an objective function defined as the purchase cost of the system power.
- the operation control unit can derive an operation schedule using an objective function defined based on MILP (Mixed-integer Linear Programming).
- MILP Mated-integer Linear Programming
- the operation control device can derive an operation schedule including the battery charge/discharge amount for each time interval by using an objective function defined as the purchase cost of system power.
- the objective function can be defined as in the following mathematical expression 1.
- Pgrid(t) is the grid power schedule and ⁇ grid(t) is the grid power cost.
- Mathematical expression 1 is an objective function for deriving the amount of charge or discharge of the battery for each time interval that can minimize the cost of purchasing power from the system.
- the objective function according to Mathematical Expression 1 may define constraints including at least one of a first condition regarding the balance of power supply and power consumption, a second condition regarding the state of charge (SOC) according to the charge/discharge efficiency of the battery, a third condition regarding the limit charge amount of the battery, a fourth condition regarding the limit output of the power conversion device, and a fifth condition regarding the binarization of the charge state and the discharge state.
- PBatch(t) is the battery charging power
- PBatdch(t) is the battery discharging power
- Ppv(t) is the power generation
- Pload(t) is the power consumption.
- SOC(t) is the SOC of the battery
- Ecap is the capacity of the battery
- ⁇ ch is the charging efficiency of the power conversion device
- ⁇ dch is the discharging efficiency of the power conversion device
- tstep is the time interval.
- SOCmin is the lower limit of SOC
- SOCmax is the upper limit of SOC
- ⁇ ch is the battery state for charging with a value of 0 or 1
- Pinv_max is the maximum output of the inverter.
- ⁇ dch is the battery state for discharging, which has a value of 0 or 1)
- the first condition can be implemented by mathematical expression 2, and the decision variables PBatch(t) and PBatdch(t) function to be determined according to the balance of power supply and demand. Meanwhile, in mathematical expression 2, Ppv(t) and Pload(t) can be applied to the power production amount per time unit and the power consumption amount per time unit according to past history information.
- mathematical expression 2 can be modified as shown in mathematical expression 8 below.
- Pflexible load(t) is the power consumption of the load that can be turned on and off
- Pnon flexible load(t) is the power consumption of the load that cannot be turned on and off
- PEV(T) is the power consumption of the EV charging station.
- the mathematical formula for the first condition regarding the balance of power supply and power consumption may have some terms added or deleted in response to power consumption status information included in past history information.
- the second condition can be implemented by mathematical expression 3, and functions to determine the SOC in the next time interval based on the battery capacity and charge/discharge efficiency.
- the third condition can be implemented by mathematical expression 4, and functions to determine the SOC within a set critical range.
- the fourth and fifth conditions can be implemented by mathematical expressions 5 to 7, and function to prevent the decision variables PBatch(t) and PBatdch(t) from exceeding the output capacity of the inverter, and at the same time prevent the charging power amount and the discharging power amount from being determined simultaneously.
- the operation control unit can derive PBatch(t) and PBatdch(t) satisfying the above objective function and constraints and generate an operation schedule including the same.
- the operation support device can perform a simulation using the past history information on power consumption and power production and the generated operation schedule for the energy storage systems to which the batteries and inverters are applied according to each combination (C #1 to #15). Thereafter, the operation support device can calculate the system power purchase cost for a preset period (e.g., one month) for each combination based on the system power usage per hour and the system power cost per hour derived from the simulation results.
- a preset period e.g., one month
- the operation support device can generate recommended combination information including information on the optimal combination (S350).
- the recommended combination information can include one or more of the number of batteries applied to the energy storage system, the connection structure of the batteries, and the model name of the inverter.
- the recommended combination information can be implemented as [4 batteries, serial connection, Inv 9801].
- the operation support device can provide the recommended combination information generated in S350 to the user terminal (S360).
- the user terminal can output the received recommended combination information through a predefined GUI.
- the operation support device may provide an optimal operation schedule corresponding to an optimal combination to a user terminal, an EMS, or an inverter.
- the optimal operation schedule may correspond to an operation schedule derived according to an objective function and constraints when calculating a grid power purchase cost of the optimal combination. That is, the operation support device may provide an optimal operation schedule corresponding to a recommended combination as a reference operation schedule so that, when an optimal battery-inverter combination is applied to an energy storage system in the future, the grid power purchase cost is minimized when the energy storage system is operated with the combination.
- Figure 7 is a block diagram of an operation support device of an energy storage system according to an embodiment of the present invention.
- the operation support device (500) may be configured to be included within an energy storage system, or may be separately provided outside the energy storage system.
- the operation support device (500) may be implemented to be included within a HEMS (Home Energy Management System), which is the top-level control system of a residential ESS, or may be implemented to be included within a server of an ESS management company.
- HEMS Home Energy Management System
- the operation support device (500) may include at least one processor (510), a memory (520) that stores at least one command executed through the processor, and a transmission/reception device (530) that is connected to a network and performs communication.
- the at least one command may include: a command for collecting information about batteries and inverters applicable to the energy storage system; a command for deriving a plurality of combinations, each combination comprising one or more batteries and an inverter, based on a structure of the energy storage system; a command for calculating an operating cost of the energy storage system for each of the combinations; and a command for generating recommended combination information including information about a combination exhibiting the lowest operating cost among the combinations.
- the command for collecting information about the battery and inverter may include a command for collecting one or more of the following: a model name, a capacity, a critical SOC range, and a purchase cost for each battery; and a model name, a limit output, and a purchase cost for each inverter.
- the command for deriving the plurality of combinations may include a command for deriving a range of the number of batteries based on the capacity of the batteries and the limit output of the inverter; and a command for deriving a plurality of combinations applicable to the energy storage system based on the range of the number of batteries and the design structure of the battery system.
- the command for calculating the operating cost of the energy storage system may include a command for calculating, for each of the combinations, a grid power purchase cost and a battery and inverter purchase cost; and a command for calculating the operating cost based on the grid power purchase cost and the battery and inverter purchase cost.
- the command for calculating the operating cost of the energy storage system may include a command for calculating a grid power purchase cost for a preset period for each of the combinations based on past history information about at least one of the energy storage system, a load coupled with the energy storage system, and a power generation device coupled with the energy storage system.
- the command for calculating the above-described system power purchase cost may include: a command for collecting information on the power consumption status of the load and information on the power production status of the power generation device; a command for deriving an operation schedule including a time-interval charge/discharge amount that minimizes the system power purchase cost by using an objective function defined as the system power purchase cost; and a command for calculating the system power purchase cost for a preset period for each of the combinations by applying the operation schedule and the system power cost information to an energy storage system according to each of the combinations.
- the objective function may be defined with constraints including at least one of a first condition regarding the balance of power supply and power consumption, a second condition regarding the state of charge (SOC) according to the charge/discharge efficiency of the battery, a third condition regarding the limit charge amount of the battery, a fourth condition regarding the limit output of the inverter, and a fifth condition regarding the binarization of the charge state and the discharge state.
- constraints including at least one of a first condition regarding the balance of power supply and power consumption, a second condition regarding the state of charge (SOC) according to the charge/discharge efficiency of the battery, a third condition regarding the limit charge amount of the battery, a fourth condition regarding the limit output of the inverter, and a fifth condition regarding the binarization of the charge state and the discharge state.
- the at least one command may further include a command for providing the generated recommended combination information to a user terminal linked with the energy storage system.
- the recommended combination information may include one or more of the number of batteries applied to the energy storage system, the connection structure of the batteries, and the model name of the inverter.
- the operation support device (500) may also further include an input interface device (540), an output interface device (550), a storage device (560), etc. Each component included in the operation support device (500) may be connected by a bus (570) and communicate with each other.
- the processor (510) may mean a central processing unit (CPU), a graphics processing unit (GPU), or a dedicated processor on which methods according to embodiments of the present invention are performed.
- the memory (or storage device) may be composed of at least one of a volatile storage medium and a nonvolatile storage medium.
- the memory may be composed of at least one of a read only memory (ROM) and a random access memory (RAM).
- the operation of the method according to an embodiment of the present invention can be implemented as a computer-readable program or code on a computer-readable recording medium.
- the computer-readable recording medium includes all types of recording devices that store data that can be read by a computer system.
- the computer-readable recording medium can be distributed over network-connected computer systems so that the computer-readable program or code can be stored and executed in a distributed manner.
- a block or device corresponds to a method step or a feature of a method step.
- aspects described in the context of a method may also be described as a feature of a corresponding block or item or a corresponding device.
- Some or all of the method steps may be performed by (or using) a hardware device, such as, for example, a microprocessor, a programmable computer or an electronic circuit. In some embodiments, one or more of the most significant method steps may be performed by such a device.
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Abstract
Description
Claims (18)
- 에너지 저장 시스템의 운영 지원 장치로서,적어도 하나의 프로세서; 및상기 적어도 하나의 프로세서를 통해 실행되는 적어도 하나의 명령을 저장하는 메모리를 포함하고,상기 적어도 하나의 명령은,상기 에너지 저장 시스템에 적용될 수 있는 배터리 및 인버터에 대한 정보를 수집하는 명령;상기 에너지 저장 시스템의 구조를 기초로, 각각 하나 이상의 배터리와 인버터로 구성된, 복수의 조합들을 도출하는 명령;상기 조합들 각각에 대한, 에너지 저장 시스템의 운영 비용을 산출하는 명령; 및상기 조합들 중 최소 운영 비용을 나타내는 조합에 관한 정보를 포함하는 추천 조합 정보를 생성하는 명령을 포함하는, 운영 지원 장치.
- 청구항 1에 있어서,상기 배터리 및 인버터에 대한 정보를 수집하는 명령은,배터리 각각에 대한, 모델명, 용량, 임계 SOC 범위 및 구매 비용과, 인버터 각각에 대한, 모델명, 한계 출력 및 구매 비용 중 하나 이상을 수집하는 명령을 포함하는, 운영 지원 장치.
- 청구항 1에 있어서,상기 복수의 조합들을 도출하는 명령은,배터리의 용량 및 인버터의 한계 출력을 기초로, 배터리 개수의 범위를 도출하는 명령; 및상기 배터리 개수의 범위와 배터리 시스템의 설계 구조를 기초로, 상기 에너지 저장 시스템에 적용 가능한 복수의 조합들을 도출하는 명령을 포함하는, 운영 지원 장치.
- 청구항 1에 있어서,상기 에너지 저장 시스템의 운영 비용을 산출하는 명령은,상기 조합들 각각에 대한, 계통 전력 구매 비용과, 배터리 및 인버터 구매 비용을 산출하는 명령; 및상기 계통 전력 구매 비용과 배터리 및 인버터 구매 비용을 기초로 상기 운영 비용을 산출하는 명령을 포함하는, 운영 지원 장치.
- 청구항 4에 있어서,상기 에너지 저장 시스템의 운영 비용을 산출하는 명령은,상기 에너지 저장 시스템, 상기 에너지 저장 시스템과 연동하는 부하, 및 상기 에너지 저장 시스템과 연동하는 전력 생산 장치 중 하나 이상에 대한 과거 이력 정보를 기초로, 상기 조합들 각각에 대한 기설정된 기간 동안의 계통 전력 구매 비용을 산출하는 명령을 포함하는, 운영 지원 장치.
- 청구항 5에 있어서,상기 계통 전력 구매 비용을 산출하는 명령은,상기 부하의 전력 소비 상태에 관한 정보, 및 상기 전력 생산 장치의 전력 생산 상태에 관한 정보를 수집하는 명령;계통 전력의 구매 비용으로 정의되는 목적 함수를 이용하여, 계통 전력의 구매 비용을 최소로 하는, 시간 구간별 충방전량을 포함한 운영 스케줄을 도출하는 명령; 및상기 조합들 각각에 따른 에너지 저장 시스템에, 상기 운영 스케줄 및 계통 전력 비용 정보를 적용하여, 상기 조합들 각각에 대한 기설정된 기간 동안의 계통 전력 구매 비용을 산출하는 명령을 포함하는, 운영 지원 장치.
- 청구항 6에 있어서,상기 목적 함수는,전력 공급 및 전력 소비의 균형에 관한 제1조건, 배터리의 충방전 효율에 따른 충전 상태(SOC)에 관한 제2조건, 배터리의 한계 충전량에 관한 제3조건, 인버터의 한계 출력에 관한 제4조건, 및 충전 상태 및 방전 상태의 이진화에 관한 제5조건 중 적어도 하나를 포함하는 제약 조건이 정의되는, 운영 지원 장치.
- 청구항 1에 있어서,상기 생성된 추천 조합 정보를, 상기 에너지 저장 시스템과 연동하는 사용자 단말에 제공하는 명령을 더 포함하는, 운영 지원 장치.
- 청구항 8에 있어서,상기 추천 조합 정보는,상기 에너지 저장 시스템에 적용되는 배터리의 개수, 배터리의 연결 구조, 및 인버터의 모델명 중 하나 이상을 포함하는, 운영 지원 장치.
- 에너지 저장 시스템의 운영 지원 방법으로서,상기 에너지 저장 시스템에 적용될 수 있는 배터리 및 인버터에 대한 정보를 수집하는 단계;상기 에너지 저장 시스템의 구조를 기초로, 각각 하나 이상의 배터리와 인버터로 구성된, 복수의 조합들을 도출하는 단계;상기 조합들 각각에 대한, 에너지 저장 시스템의 운영 비용을 산출하는 단계; 및상기 조합들 중 최소 운영 비용을 나타내는 조합에 관한 정보를 포함하는 추천 조합 정보를 생성하는 단계를 포함하는, 운영 지원 방법.
- 청구항 10에 있어서,상기 배터리 및 인버터에 대한 정보를 수집하는 단계는,배터리 각각에 대한, 모델명, 용량, 임계 SOC 범위 및 구매 비용과, 인버터 각각에 대한, 모델명, 한계 출력 및 구매 비용 중 하나 이상을 수집하는 단계를 포함하는, 운영 지원 방법.
- 청구항 10에 있어서,상기 복수의 조합들을 도출하는 단계는,배터리의 용량 및 인버터의 한계 출력을 기초로, 배터리 개수의 범위를 도출하는 단계; 및상기 배터리 개수의 범위와 배터리 시스템의 설계 구조를 기초로, 상기 에너지 저장 시스템에 적용 가능한 복수의 조합들을 도출하는 단계를 포함하는, 운영 지원 방법.
- 청구항 10에 있어서,상기 에너지 저장 시스템의 운영 비용을 산출하는 단계는,상기 조합들 각각에 대한, 계통 전력 구매 비용과, 배터리 및 인버터 구매 비용을 산출하는 단계; 및상기 계통 전력 구매 비용과 배터리 및 인버터 구매 비용을 기초로 상기 운영 비용을 산출하는 단계를 포함하는, 운영 지원 방법.
- 청구항 13에 있어서,상기 에너지 저장 시스템의 운영 비용을 산출하는 단계는,상기 에너지 저장 시스템, 상기 에너지 저장 시스템과 연동하는 부하, 및 상기 에너지 저장 시스템과 연동하는 전력 생산 장치 중 하나 이상에 대한 과거 이력 정보를 기초로, 상기 조합들 각각에 대한 기설정된 기간 동안의 계통 전력 구매 비용을 산출하는 단계를 포함하는, 운영 지원 방법.
- 청구항 14에 있어서,상기 계통 전력 구매 비용을 산출하는 단계는,상기 부하의 전력 소비 상태에 관한 정보, 및 상기 전력 생산 장치의 전력 생산 상태에 관한 정보를 수집하는 단계;계통 전력의 구매 비용으로 정의되는 목적 함수를 이용하여, 계통 전력의 구매 비용을 최소로 하는, 시간 구간별 충방전량을 포함한 운영 스케줄을 도출하는 단계; 및상기 조합들 각각에 따른 에너지 저장 시스템에, 상기 운영 스케줄 및 계통 전력 비용 정보를 적용하여, 상기 조합들 각각에 대한 기설정된 기간 동안의 계통 전력 구매 비용을 산출하는 단계를 포함하는, 운영 지원 방법.
- 청구항 15에 있어서,상기 목적 함수는,전력 공급 및 전력 소비의 균형에 관한 제1조건, 배터리의 충방전 효율에 따른 충전 상태(SOC)에 관한 제2조건, 배터리의 한계 충전량에 관한 제3조건, 인버터의 한계 출력에 관한 제4조건, 및 충전 상태 및 방전 상태의 이진화에 관한 제5조건 중 적어도 하나를 포함하는 제약 조건이 정의되는, 운영 지원 방법.
- 청구항 10에 있어서,상기 생성된 추천 조합 정보를, 상기 에너지 저장 시스템과 연동하는 사용자 단말에 제공하는 명령을 더 포함하는, 운영 지원 방법.
- 청구항 17에 있어서,상기 추천 조합 정보는,상기 에너지 저장 시스템에 적용되는 배터리의 개수, 배터리의 연결 구조, 및 인버터의 모델명 중 하나 이상을 포함하는, 운영 지원 방법.
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| EP24843468.0A EP4632988A4 (en) | 2023-07-17 | 2024-07-16 | OPERATIONAL SUPPORT DEVICE AND ENERGY STORAGE SYSTEM METHOD |
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| KR101904902B1 (ko) * | 2017-10-20 | 2018-10-12 | 신동준 | 에너지 저장장치의 운영시스템 |
| US20200089178A1 (en) * | 2017-03-06 | 2020-03-19 | Con Edison Battery Storage, Llc | Building energy storage system with planning tool |
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| KR20220095313A (ko) * | 2020-12-29 | 2022-07-07 | 주식회사 그리드위즈 | 디지털 트윈 기반의 분산 자원 및 전력 계통 운영 계획 시스템 및 운영 계획 방법 |
| KR20230092219A (ko) | 2021-12-17 | 2023-06-26 | 다이텍연구원 | 내마모성이 우수한 도장보호 접착필름용 폴리우레탄계 코팅제 조성물 |
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| KR101380530B1 (ko) | 2011-10-12 | 2014-04-01 | (주)에스엔디파워닉스 | 계통 연계형 에너지 저장 시스템 |
| KR102272179B1 (ko) * | 2018-11-28 | 2021-07-02 | 엘에스일렉트릭(주) | Pcs 및 ess 배터리 용량 산정 최적화 장치 및 그 장치의 제어 방법 |
| CN114678876B (zh) * | 2022-03-31 | 2024-07-23 | 华南理工大学 | 一种考虑期望度电功率曲线的新型需求响应方法 |
| CN116316588B (zh) * | 2023-03-09 | 2025-09-12 | 深圳供电局有限公司 | 微电网的优化调度方法、装置、计算机设备和存储介质 |
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- 2024-07-16 WO PCT/KR2024/010138 patent/WO2025018752A1/ko active Pending
- 2024-07-16 CN CN202480007307.6A patent/CN120530548A/zh active Pending
- 2024-07-16 EP EP24843468.0A patent/EP4632988A4/en active Pending
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| US9056556B1 (en) * | 2014-02-25 | 2015-06-16 | Elwha Llc | System and method for configuration and management of an energy storage system for a vehicle |
| US20200089178A1 (en) * | 2017-03-06 | 2020-03-19 | Con Edison Battery Storage, Llc | Building energy storage system with planning tool |
| KR101904902B1 (ko) * | 2017-10-20 | 2018-10-12 | 신동준 | 에너지 저장장치의 운영시스템 |
| CN110896246A (zh) * | 2019-12-05 | 2020-03-20 | 西南交通大学 | 一种混合储能式有轨电车系统的配置优化方法 |
| KR20220095313A (ko) * | 2020-12-29 | 2022-07-07 | 주식회사 그리드위즈 | 디지털 트윈 기반의 분산 자원 및 전력 계통 운영 계획 시스템 및 운영 계획 방법 |
| KR20230092219A (ko) | 2021-12-17 | 2023-06-26 | 다이텍연구원 | 내마모성이 우수한 도장보호 접착필름용 폴리우레탄계 코팅제 조성물 |
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| Publication number | Publication date |
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| CN120530548A (zh) | 2025-08-22 |
| JP2026503106A (ja) | 2026-01-27 |
| EP4632988A4 (en) | 2026-04-22 |
| KR20250012238A (ko) | 2025-01-24 |
| EP4632988A1 (en) | 2025-10-15 |
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