Method and device for controlling power

Abstract

A device according to one aspect comprises: a communication unit connected to a virtual power plant (VPP) operating system and an energy storage system (ESS) to transmit and receive information; and a processor for calculating first power information and second power information for controlling a power generation or charging operation of the energy storage system on the basis of a target power amount as the target power amount is received from the virtual power plant operating system via the communication unit, and controlling the communication unit so that the second power information is transmitted to the energy storage system.

Description

Method and device for controlling power

[0001] The present disclosure relates to a method and device for controlling power. Specifically, the present disclosure relates to a method and device that enable monitoring and control of a virtual power plant (VPP) operating system and a subordinate energy storage system (ESS) without separate interaction.

[0002] Existing energy storage systems (ESS) and virtual power plant (VPP) operating systems play a crucial role in managing diverse energy sources and interacting with the power network. However, integrating ESS from various manufacturers and models, or interoperating with products from other manufacturers, presents challenges in protocol and communication compatibility. Furthermore, residential and commercial ESS require separate energy meters and current transformers (CTs) to manage self-consumption and power transactions. Therefore, an energy meter and communication system that overcomes these limitations and challenges and facilitates the integration of ESS from various manufacturers is needed.

[0003] The background technology described above is technical information that the inventor possessed for the purpose of deriving the present disclosure or acquired in the process of deriving the present disclosure, and cannot necessarily be considered as publicly known technology disclosed to the general public prior to the filing of the present disclosure.

[0004] An object of the present disclosure is to provide a method and device for efficiently operating a virtual power plant (VPP) and an energy storage system (ESS).

[0005] An object of the present disclosure is to provide a method and device for facilitating the formation of a virtual power plant (VPP) cluster in a unit area.

[0006] An object of the present disclosure is to provide a method and device capable of controlling energy storage systems (ESS) of various manufacturers and models without separate compatibility work.

[0007] The problems to be solved by this disclosure are not limited to those mentioned above. Other problems and advantages of this disclosure not mentioned above can be understood through the following description and will be more clearly understood through the embodiments of this disclosure. Furthermore, it will be appreciated that the problems and advantages to be solved by this disclosure can be realized by the means and combinations thereof set forth in the claims.

[0008] A device according to one aspect includes a communication unit that is connected to a virtual power plant (VPP) operating system and an energy storage system (ESS) to transmit and receive information; and a processor that, upon receiving a target power amount from the virtual power plant operating system through the communication unit, calculates second power information for controlling a power generation or charging operation of the energy storage system based on first power information and the target power amount, and controls the communication unit so that the second power information is transmitted to the energy storage system.

[0009] A method for controlling power according to another aspect includes: receiving a target power amount from a virtual power plant (VPP) operating system; calculating second power information for controlling a power generation or charging operation of an energy storage system (ESS) based on first power information and the target power amount; and transmitting the second power information to the energy storage system.

[0010] Another aspect of a computer-readable recording medium includes a recording medium having recorded thereon a program for executing the above-described method on a computer.

[0011] In addition, other methods for implementing the present disclosure, other systems, and computer-readable recording media storing a computer program for executing the method may be further provided.

[0012] Other aspects, features and advantages other than those described above will become apparent from the following drawings, claims and detailed description of the invention.

[0013] According to the present disclosure, a device (e.g., a smart meter) for efficiently operating a virtual power plant (VPP) and an energy storage system (ESS) can be provided to improve the convenience of energy management and power trading.

[0014] Furthermore, it can facilitate virtual power plant (VPP) clustering by resolving separate protocol and compatibility issues for integrating energy storage systems (ESS) from various manufacturers. This can help various participants in the energy market collaborate to improve energy efficiency and increase flexibility in energy trading.

[0015] Additionally, accurate energy metering through devices can reduce energy costs and promote environmentally friendly energy use by effectively monitoring and managing energy usage.

[0016] Additionally, it can improve energy management in the electricity trading market, enabling a quick response to oversupply or undersupply situations, and strengthen cooperation among energy market participants.

[0017] The effects of the present disclosure are not limited to those mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description below.

[0018] Figure 1 is a virtual collective power concept diagram.

[0019] Figure 2 is an example diagram of a typical VPP operating environment.

[0020] Figure 3 is a diagram explaining power system measurement using a general current transformer.

[0021] FIG. 4 is a drawing illustrating an example of a power system measurement environment using a device according to the present disclosure.

[0022] FIG. 5 is a block diagram schematically illustrating an example of a device according to the present disclosure.

[0023] Figures 6 and 7 are exemplary diagrams illustrating examples of VPP operation scenarios according to the present disclosure.

[0024] FIG. 8 is a flowchart illustrating an example of a method for controlling power according to the present disclosure.

[0025] The advantages and features of the present disclosure, and methods for achieving them, will become clearer with reference to the embodiments described in detail together with the accompanying drawings. However, the present disclosure is not limited to the embodiments presented below, but may be implemented in various different forms, and it should be understood that it includes all transformations, equivalents, and substitutes included in the spirit and technical scope of the present disclosure. The embodiments presented below are provided to ensure that the disclosure of the present disclosure is complete and to fully inform those skilled in the art of the present disclosure of the scope of the disclosure. In describing the present disclosure, if a detailed description of a related known technology is determined to obscure the gist of the present disclosure, the detailed description thereof will be omitted.

[0026] The terminology used in this application is only used to describe specific embodiments and is not intended to limit the present disclosure. The singular expression includes the plural expression unless the context clearly indicates otherwise. In this application, it should be understood that the terms "comprise" or "have" are intended to indicate the presence of a feature, number, step, operation, component, part, or combination thereof described in the specification, but do not preclude the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof. Terms such as first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used solely for the purpose of distinguishing one component from another.

[0027] Additionally, in the present application, a “part” may be a hardware component such as a processor or circuit, and / or a software component executed by a hardware component such as a processor.

[0028] Hereinafter, embodiments according to the present disclosure will be described in detail with reference to the attached drawings. In describing with reference to the attached drawings, identical or corresponding components are assigned the same drawing numbers, and redundant descriptions thereof will be omitted.

[0029] In the following examples, the terms first, second, etc. are not used in a limiting sense but are used for the purpose of distinguishing one component from another.

[0030] In the examples below, singular expressions include plural expressions unless the context clearly indicates otherwise.

[0031] In the following examples, terms such as “include” or “have” mean that a feature or component described in the specification is present, and do not preclude the possibility that one or more other features or components may be added.

[0032] In some embodiments, where the implementation is otherwise feasible, a particular process sequence may be performed in a different order than described. For example, two processes described in succession may be performed substantially simultaneously, or in a reverse order from the described order.

[0033] Figure 1 is a virtual collective power concept diagram, Figure 2 is an example diagram of a typical VPP operating environment, and Figure 3 is a diagram explaining power system measurement using a typical current transformer.

[0034] Referring to FIGS. 1 to 3, a home ESS (210) is generally configured or installed with an output capacity of 5 kW to 6 kW, and in order to link it with a VPP operating system (220), a VPP cluster of at least 200 units per unit area must be formed as shown in FIG. 1 to facilitate power trading with a capacity of 1 MW.

[0035] In reality, ESS (210) of several manufacturers are installed in a unit area, and each manufacturer is building or planning a VPP operating system (220). Therefore, in order to configure a VPP cluster, an energy gateway (230) must be connected to ESS (210) of other manufacturers to enable interoperability. In order to make ESS (210) of other manufacturers compatible, the energy gateway (230) must be connected to ESS (210) of other manufacturers at least 3 times. rd Protocols for party gateway integration must be shared, and control access, not just for monitoring purposes, must also be possible. If the ESS (210) is from the same manufacturer, a VPP cluster can be configured without a separate energy gateway (230), as shown in Figure 2.

[0036] A common function of a home ESS is the self-consumption function, which uses the active power measured by the energy meter (240) as 0. The ESS (210) obtains information on the voltage, current, frequency, active power, reactive power, apparent power, and power factor of the system through the energy meter (240) before the power system through the load (250) via communication (RS485 / WiFi, Modbus RTU / TCP). For example, the ESS (210) can calculate the load through the following mathematical expression 1 based on the obtained information.

[0037]

[0038] Referring to mathematical expression 1, the basic operation of the ESS (210) is to control the active power (Inverter Active Power) of the ESS (210) by the calculated load so that the grid active power (Active Power) measured by the energy meter (240) becomes 0.

[0039] The ESS (210) linked with the upper VPP operating system (220) performs a self-consumption function operation, and when power trading is required by the upper VPP operating system (220), it generates or charges an energy target power amount to the power grid. The target power amount may include a first target power amount and a second target power amount.

[0040] The first target power amount is an export target power (W), which may include generating power from the ESS (210) and selling energy to the power grid. The second target power amount is a battery charge target power (W), which may include charging the ESS (210) to the power grid.

[0041] There are two methods for measuring the amount of power in a general power system: one is to measure using an energy meter (240), and the other is to use a current transformer (310) as shown in Fig. 3.

[0042] Referring to FIG. 3, a method of measuring the power amount of a power system using a current transformer (310) can measure the direction and size of the current using the current transformer (310), and calculate the active power of the system through the voltage measured by the ESS (320).

[0043] As described above, it is difficult to link ESS (210) to one VPP operating system (220) to form a VPP cluster in a unit area, and it is difficult to connect ESS (210) of other manufacturers to three VPP operating systems (220). rd VPP clustering is not possible if a party gateway is not supported. Furthermore, integration via an energy gateway (230) requires business-to-business agreements and shared protocols and security certificates to ensure compatibility with ESSs (210) from other manufacturers. Even if protocols are shared, ensuring compatibility across numerous manufacturers requires significant development time and human resources. To address these issues, a different approach is needed that allows for easier control of ESSs (210) from other manufacturers.

[0044] FIG. 4 is a drawing illustrating an example of a power system measurement environment using a device according to the present disclosure.

[0045] In the following description, any part that overlaps with the description of FIGS. 1 to 3 will be omitted.

[0046] Referring to FIG. 4, the power system measurement environment according to the present disclosure may include a VPP operating system (410), an ESS (420), a device (430), and a load (440). For example, the device (430) may be a smart meter, but is not limited thereto.

[0047] In Figure 4, the Grid may include a system that generates and transmits power. A photovoltaic (PV) generator may convert solar energy into electrical energy and transmit it to an energy storage system (ESS) (420). A battery may be connected to the ESS (420) to generate or charge power.

[0048] The VPP operating system (410) can transmit a first target power amount to the device (430) when a power shortage occurs or is predicted in the power trading market. Here, the first target power amount is an export target power (W), which can include generating energy using the ESS (420) and selling energy to the power grid.

[0049] The VPP operating system (410) can transmit a second target power amount to the device (430) when an oversupply occurs or is predicted in the power trading market. Here, the second target power amount is a battery charge target power (W), which can include charging the ESS (420) to the power grid.

[0050] The ESS (420) can supply (generate) power stored in the battery to the grid or take electric energy from the grid and store (charge) it in the battery based on the second power information received from the device (430). Here, the second power information can include a digital signal that controls the power generation or charging operation of the ESS (420).

[0051] ESS (420) can play a crucial role in regulating power supply and demand and maintaining the stability of the power network. The generation or charging of ESS (420) is flexibly adjusted according to power demand and supply patterns in the power trading market, improving energy efficiency and maintaining the stability of the power network.

[0052] The device (430) can receive a target power generation amount or a target power charging amount from the VPP operating system (410) as power generation or charging is required in the power trading market. The device (430) can calculate second power information and transmit it to the ESS (420) so that the ESS (420) can generate or charge the required target power generation amount or target power charging amount in response to the target power generation amount or target power charging amount.

[0053] FIG. 5 is a block diagram schematically illustrating an example of a device according to the present disclosure. In the following description, any part that overlaps with the description of FIGS. 1 to 4 will be omitted. Referring to FIG. 5, the device (430) may include a measuring unit (431), a first communication unit (432), a processor (433), a second communication unit (434), and a conversion unit (435).

[0054] The measuring unit (431) can sense power and current to measure first power information. Here, the first power information can include frequency, active power, reactive power, apparent power, and power factor.

[0055] Frequency can indicate the number of oscillations of an alternating current (AC) electrical signal generated in a power grid. It is typically expressed in Hertz (Hz) and can represent the number of cycles per second. Active power (or real power) can indicate the power actually delivered and used in a power grid. Active power is the power used to perform work or convert energy, and is typically expressed in units of watts (W). Active power can indicate the actual use of electrical energy. Reactive power can indicate the form of power generated during energy conversion and transmission processes in a power network without performing effective work. Apparent power is the sum of active power and reactive power and can indicate the total amount of power delivered in a power network. Power factor can indicate the ratio of active power to apparent power in a power grid. Power factor can typically be expressed as a value between 0 and 1, or 0% to 100%. A power factor of 1 or 100% means the system is fully efficient. A lower power factor reduces efficiency. A low power factor increases reactive power, which can strain the power network and electrical equipment.

[0056] The communication unit can be connected to the VPP operating system (410) and the ESS (420) to transmit and receive information. The communication unit can transmit information to the VPP operating system (410) and the ESS (420) using RS-485 communication, Wi-Fi or Ethernet communication, Modbus protocol communication, TCP / IP or UDP communication, etc. In the present disclosure, the communication unit can include a first communication unit (432) and a second communication unit (434).

[0057] The first communication unit (432) can communicate with the VPP operating system (410), transmit power monitoring data (first power information), and receive ESS control commands.

[0058] The processor (433) can receive the target power amount from the VPP operating system (410) through the first communication unit (432), and can calculate second power information for controlling the power generation or charging operation of the ESS (420) based on the first power information and the target power amount.

[0059] For example, when the processor (433) receives the first target power amount (Export target power) for generating the ESS (420) from the VPP operating system (410), the processor (433) may calculate second power information including an active power recalculation value that is the sum of the active power included in the first power information and the first target power amount. The processor (433) may include the active power recalculation value and the current recalculation value calculated based on the voltage sensed by the measuring unit (431) in the second power information.

[0060] The processor (433) may calculate second power information including the second target power as a recalculated value of active power upon receiving the second target power (Battery charge target power) for charging the ESS (420) from the VPP operating system (410). For example, the processor (433) may include the second target power and the current recalculated value calculated based on the voltage sensed by the measuring unit (431) in the second power information.

[0061] The second communication unit (434) can transmit the second power information generated by the processor (433) to the ESS (420). The second communication unit (434) can transmit the second power information including the active power recalculation value obtained by adding the active power included in the first power information and the first target power amount to the ESS (420) to generate power for the ESS (420). The second communication unit (434) can transmit the second power information including the second target power amount to the ESS (420) to charge the ESS (420).

[0062] The conversion unit (435) can convert the digital current recalculation value included in the second power information into an analog signal and link it with the ESS (420). The conversion unit (435) can be an analog signal conversion unit for linking the digital current recalculation value with the CT connection terminal of the ESS (420).

[0063] The device (430) according to the present disclosure can measure power information and share it with a linked ESS (420), and transmit the information so that it can be monitored by the VPP operating system (410). When control is required through the VPP operating system (410) depending on the power market, the target power amount (Target power) can be transmitted to the ESS (420) that is clustered as a unit, in the amount of power energy required by the power market or by the self-supply / demand prediction system.

[0064] The VPP operating system (410) can transmit the first target power (Export target power) to the device (430) when the ESS (420) requires power generation, and can transmit the second target power (Battery charge target power) to the device (430) when the ESS (420) requires grid charging.

[0065] The processor (433) can generate an active power recalculation value to reflect the target power amount of the VPP operating system (410). For example, the processor (434) can generate an active power recalculation value according to the following mathematical expression 2.

[0066]

[0067] In mathematical expression 2, the active power recalculation value for generating the ESS (420) may include the result of adding the active power included in the first power information and the first target power amount. In addition, in mathematical expression 2, the active power recalculation value for charging the ESS (420) may include the second power information.

[0068] The processor (433) can generate a current recalculation value using the active power recalculation value to reflect the target power amount of the VPP operating system (410). For example, the processor (434) can generate a current recalculation value according to the following mathematical expression 3.

[0069]

[0070] In mathematical expression 3, the current recalculation value for generating ESS (420) may include the result of dividing the active power recalculation value by the measured voltage. In mathematical expression 3, ETP may represent the first target power amount (Export target power), and BCTP may represent the second target power amount (Battery charge target power).

[0071] The result of adding the active power included in the first power information and the first target power amount may be included. In addition, the active power recalculation value for charging the ESS (420) in mathematical expression 2 may include the second power information.

[0072] When the device (430) receives the first target power amount from the VPP operating system (410), it can transmit second power information, which is the sum of the first target power amount and the actually measured active power, to the ESS (420). From the perspective of the ESS (420), it can recognize that the load has increased and generate power greater than the first target power amount.

[0073] When the device (430) receives the second target power amount from the VPP operating system (410), it can transmit second power information including the second target power amount to the ESS (420). From the perspective of the ESS (420), it can charge from the grid the amount of the second target power amount.

[0074] FIG. 6 and FIG. 7 are exemplary diagrams illustrating examples of VPP operation scenarios according to the present disclosure.

[0075] In the following description, any part that overlaps with the description of FIGS. 1 to 6 will be omitted. FIG. 6 is an example diagram explaining a VPP operation scenario according to a first target power amount, and FIG. 7 is an example diagram explaining a VPP operation scenario according to a second target power amount.

[0076] Referring to Fig. 6, if the initial load (440) is 1000W and is supplied from the grid, the measurement information of the device (430) may be 1000W. At this time, if the ESS (420) is connected, the Inverter Active Power is 0W and the Grid Active Power is 1000W when calculating the load (440), so the load (440) is calculated as 1000W, and an output of 1000W may be achieved from the ESS (420). In this case, since the load (440) is now supplied from the ESS (420) and not from the grid, the Grid Active Power may be 0W.

[0077] In the scenario illustrated in FIG. 6, in order to generate an additional 3,000 W to the grid through the VPP operating system (410), ① the device (430) can be commanded to set the first target power (Export target power) to 3,000 W from the VPP operating system (410). ② The device (430) can then transfer 3,000 W, which is the sum of the Grid Active Power and the current value, to the ESS (420). ③ In the ESS (420), the load (440) can be recalculated to 4,000 W. ④ In order to respond to the load (440), the ESS (420) can output an additional 3,000 W that meets the requirements of the VPP operating system (410) from the existing 1,000 W, to output a total of 4,000 W. ⑤ Then, the Grid Active Power of the device (430) changes back to 0W, but the actual power amount can be output to the grid as -3000W.

[0078] Referring to FIG. 7, in order to additionally charge 3000 W from the grid through the VPP operating system (410) in the scenario described above with reference to FIG. 6, ① the device can receive a command from the VPP operating system (410) to set the second target power (Battery charge target power) to 2000 W. ② Then, the smart meter (430) can change the Grid Active Power to -2000 W and transmit it to the ESS (420). Here, the device (430) can recognize that 2000 W is being exported to the grid. ③ The ESS (420) can recalculate the load as -2000 W. This can be determined that there is 2000 W of surplus power by another generator in the same grid. ④ If the ESS (420) is capable of charging, it can be charged with 2000 W of the grid's surplus power. ⑤ Then, the Grid Active Power of the device (430) changes back to 0W, but the actual power amount can be purchased from the grid as 3000W, which is the sum of 2000W charged by the ESS (420) and 1000W of the actual load (440).

[0079] As an optional example, if the ESS (420) is connected to a CT rather than a device (430), the ESS (420) receives analog signal information of the CT and calculates power system data, so the current data calculated by the processor (434) is converted into an analog signal through a conversion unit (435), and the analog signal port is connected to the ESS (420) so that the CT information can be obtained from the ESS (420).

[0080] In the present disclosure, it is easier than the prior art to form a VPP cluster in a unit area through another device (430), and various models of ESS (420) from other manufacturers can be controlled without separate compatibility work. In addition, products connected based on communication with existing power meters can control VPP power through the communication unit of the device (430), and products linked with CT can control VPP power through the conversion unit (435). This allows ESSs that were previously incompatible to be VPP clustered through the device (430).

[0081] FIG. 8 is a flowchart illustrating an example of a method for controlling power according to the present disclosure.

[0082] In the following description, any part that overlaps with the description of FIGS. 1 to 7 will be omitted. The method for controlling power according to the present disclosure may be performed by the processor (434) with the help of peripheral components of the device (430).

[0083] Referring to FIG. 8, in step S810, the processor (434) may receive a target power amount from the VPP operating system (410). In the present disclosure, the target power amount may include a first target power amount and a second target power amount.

[0084] In step S820, the processor (434) may calculate second power information for controlling the generation or charging operation of the ESS (420) based on the first power information and the target power amount. In the present disclosure, the first power information may include frequency, active power, reactive power, apparent power, and power factor measured by sensing power and current. In the present disclosure, the processor (434) may calculate second power information including an active power recalculation value that is the sum of the active power included in the first power information and the first target power amount upon receiving the first target power amount for generating the ESS (420) from the VPP operating system (410). The processor (434) may include the active power recalculation value and the current recalculation value calculated based on the voltage sensed by the measuring unit (431 of FIG. 5) that measures the first power information in the second power information.

[0085] In the present disclosure, the processor (434) may receive a second target power amount for charging the ESS (420) from the VPP operating system (410), and may calculate second power information including the second target power amount as an active power recalculation value. The processor (434) may include a current recalculation value calculated based on a voltage sensed by a measuring unit that measures the second target power amount and the first power information in the second power information.

[0086] At step S830, the processor (434) can transmit second power information to the ESS (430).

[0087] As an optional example, the processor (434) may convert the digital current recalculation value included in the second power information into an analog signal and transmit it to the ESS (420).

[0088] The embodiments of the present disclosure described above may be implemented in the form of a computer program that can be executed through various components on a computer, and such a computer program may be recorded on a computer-readable medium. In this case, the medium may include a magnetic medium such as a hard disk, a floppy disk, and a magnetic tape, an optical recording medium such as a CD-ROM and a DVD, a magneto-optical medium such as a floptical disk, and a hardware device specifically configured to store and execute program instructions, such as a ROM, a RAM, a flash memory, etc.

[0089] Meanwhile, the computer program may be specifically designed and configured for the present disclosure, or may be known and available to those skilled in the computer software field. Examples of computer programs may include not only machine language code, such as that generated by a compiler, but also high-level language code that can be executed by a computer using an interpreter or the like.

[0090] The use of the term "above" and similar referential terms in the specification of this disclosure (especially in the claims) may refer to both the singular and the plural. Furthermore, if a range is described in this disclosure, it is intended that the disclosure includes individual values ​​within the range (unless otherwise stated), and is equivalent to describing each individual value within the range in the detailed description of the disclosure.

[0091] Unless the steps constituting the method according to the present disclosure are explicitly described in a specific order or are otherwise described in a different order, the steps may be performed in any appropriate order. The present disclosure is not necessarily limited by the order in which the steps are described. The use of all examples or exemplary terms (e.g., "for example," etc.) in this disclosure is merely intended to illustrate the present disclosure in more detail, and the scope of the present disclosure is not limited by the examples or exemplary terms unless otherwise defined by the claims. Furthermore, those skilled in the art will appreciate that various modifications, combinations, and variations can be configured according to design conditions and factors within the scope of the appended claims or their equivalents.

[0092] Therefore, the spirit of the present disclosure should not be limited to the embodiments described above, and all scopes equivalent to or equivalent to the scope of the following claims as well as the scope of the present disclosure are considered to fall within the scope of the spirit of the present disclosure.

Claims

1. A communication unit that is connected to the virtual power plant (VPP) operating system and the energy storage system (ESS) to transmit and receive information; and A device including a processor that receives a target power amount from the virtual power plant operation system through the communication unit, calculates second power information for controlling a power generation or charging operation of the energy storage system based on the first power information and the target power amount, and controls the communication unit so that the second power information is transmitted to the energy storage system.

2. In paragraph 1, A device further comprising a conversion unit that converts a digital current recalculation value included in the second power information into an analog signal and links it with the processor.

3. In paragraph 1, The above first power information is, A device comprising frequency, real power, reactive power, apparent power and power factor, which are measured by sensing power and current.

4. In paragraph 1, The above processor, A device that, upon receiving a first target power amount for generating the energy storage system from the virtual power plant operation system, calculates the second power information including the active power recalculation value obtained by adding the active power included in the first power information and the first target power amount.

5. In paragraph 4, The above processor, A device that includes a current recalculation value calculated based on the voltage sensed by a measuring unit that measures the active power recalculation value and the first power information in the second power information.

6. In paragraph 1, The above processor, A device that receives a second target power amount for charging the energy storage system from the virtual power plant operating system, and calculates the second power information including the second target power amount as an effective power recalculation value.

7. In paragraph 6, The above processor, A device that includes a current recalculation value calculated based on a voltage sensed by a measuring unit that measures the second target power amount and the first power information in the second power information.

8. Step of receiving target power amount from the virtual power plant (VPP) operating system; A step of calculating second power information for controlling the generation or charging operation of an energy storage system (ESS) based on the first power information and the target power amount; and A method for controlling power, comprising the step of transmitting the second power information to the energy storage system.

9. In paragraph 8, A method for controlling power, further comprising the step of converting a digital current recalculation value included in the second power information into an analog signal and transmitting the same to the energy storage system.

10. In paragraph 8, The above first power information is, A method of controlling power, comprising sensing power and current to measure frequency, real power, reactive power, apparent power and power factor.

11. In paragraph 8, The step of calculating the second power information is as follows: A method for controlling power, comprising the step of calculating the second power information including the active power recalculation value obtained by adding the active power included in the first power information and the first target power amount, upon receiving the first target power amount for generating the energy storage system from the virtual power plant operating system.

12. In paragraph 11, The step of calculating the second power information is as follows: A method for controlling power, comprising the step of including a current recalculation value calculated based on the voltage sensed by a measuring unit measuring the active power recalculation value and the first power information in the second power information.

13. In paragraph 8, The step of calculating the second power information is as follows: A method for controlling power, comprising the step of calculating second power information including the second target power amount as an effective power recalculation value upon receiving a second target power amount for charging the energy storage system from the virtual power plant operating system.

14. In paragraph 13, The step of calculating the second power information is as follows: A method for controlling power, comprising the step of including a current recalculation value calculated based on a voltage sensed by a measuring unit that measures the second target power amount and the first power information in the second power information.

15. A computer-readable recording medium having recorded thereon a program for executing the method of Article 8 on a computer.

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