Energy management system and method of operation thereof

Abstract

To provide an energy management system and a method of operation thereof that reduce investment costs for line expansion.SOLUTION: The energy management system includes: a receiver that receives power amount information indicating an amount of power generated by a first new and renewable energy power plant located in a first region 500, an amount of power stored in a first energy storage device for the first new and renewable energy power plant, an amount of power generated by a second new and renewable energy power plant located in a second region 503, and an amount of power stored in a second energy storage device for the second new and renewable energy power plant; and a controller that determines an operation mode for each of the energy storage devices based on the received power amount information. The power from the first new and renewable energy power plant is supplied to a first substation through a first line 506, the power from the second new and renewable energy power plant is supplied to a second substation through a second line 507, and power generated in the first and second substations is supplied to a user 511 through an integrated line 510.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present invention relates to an energy management system. [Background technology]

[0002] A power grid is a system in which power plants, substations, transmission and distribution lines, and loads work together to generate and use electricity. Power plants produce electricity and transmit it to sending end substations. Sending end substations transmit the electricity to distribution end substations. Distribution end substations separate and distribute the electricity to final consumers. Meanwhile, there has been much interest recently in new renewable energy sources that can generate electricity without emitting carbon dioxide, making the construction of more new renewable energy power plants inevitable. As more new renewable energy power plants are built, there is a demand for technology that can provide a stable supply of electricity while efficiently using existing facilities.

[0003] In general, the amount of power that must be supplied to a user via an integrated line (a line that receives power from a substation connected to one or more power plants and transmits it to an electricity user) may be the same as the reference capacity of the integrated line. However, there may be cases where an amount of power less than the reference capacity of the integrated line must be supplied to a user via the integrated line. For example, when a safety problem occurs on the user side or the integrated line side, or when the amount of power produced by the power plant and the substation is significantly small, the maximum power that must be continuously transmitted via the integrated line may be less than the reference capacity of the integrated line. Therefore, even in this case, a system is required that can constantly supply an amount of power less than the reference capacity of the integrated line via the integrated line.

[0004] In addition, a typical energy storage system (ESS) may charge or discharge power based on the amount of power generated by a renewable energy power plant and the reference capacity of a line connected to the power plant. However, if the amount of power that must be supplied through the integrated line is less than the reference capacity of the integrated line, the amount of power that must be supplied through the integrated line may not be supplied using only the conventional ESS charging / discharging method. For example, the amount of power that must be supplied through the integrated line may be equal to the reference capacity of the integrated line using only the conventional ESS charging / discharging method. Therefore, even in such cases, a system is required that determines the amount of power to be charged / discharged by ESSs located in different regions through communication between power plants, substations, and / or corresponding energy storage devices. Summary of the Invention [Problem to be solved by the invention]

[0005] An embodiment of the present invention is directed to improving line utilization by controlling the charging or discharging operations of an energy storage system.

[0006] An embodiment of the present invention is directed to managing a power system to provide an amount of power that must be provided through an aggregate line even if the amount of power provided is less than the aggregate line's nominal capacity.

[0007] An embodiment of the present invention is for appropriately determining the charge / discharge power amounts of ESSs located in different areas through communication between power plants, substations and / or corresponding energy storage devices of a power system. [Means for solving the problem]

[0008] An energy management system according to one embodiment includes a receiver that receives power amount information representing an amount of power produced at a first renewable energy power plant, an amount of power stored in a first energy storage device for the first renewable energy power plant, an amount of power produced at a second renewable energy power plant, and an amount of power stored in a second energy storage device for the second renewable energy power plant, and a controller that determines an operation mode for each of the first energy storage device and the second energy storage device based on the received power amount information, wherein the power produced at the first renewable energy power plant is supplied to a first substation via a first line, the power produced at the second renewable energy power plant is supplied to a second substation via a second line, and the power produced at the first substation and the second substation are supplied to a user via an integrated line, and the reference capacity of the integrated line is equal to the sum of the reference capacity of the first line and the reference capacity of the second line, and the amount of power supplied to the user via the integrated line may be smaller than the reference capacity of the integrated line.

[0009] An operating method of an energy management system according to one embodiment includes the steps of receiving power amount information representing an amount of power produced at a first renewable energy power plant, an amount of power stored in a first energy storage device for the first renewable energy power plant, an amount of power produced at a second renewable energy power plant, and an amount of power stored in a second energy storage device for the second renewable energy power plant; and determining an operating mode for each of the first energy storage device and the second energy storage device based on the received power amount information, wherein the power produced at the first renewable energy power plant is supplied to a first substation via a first line, the power produced at the second renewable energy power plant is supplied to a second substation via a second line, and the power produced at the first substation and the second substation are supplied to a user via an integrated line, a reference capacity of the integrated line is equal to the sum of the reference capacity of the first line and the reference capacity of the second line, and the amount of power supplied to the user via the integrated line may be less than the reference capacity of the integrated line.

[0010] According to an embodiment, the power system includes a first renewable energy power plant, a second renewable energy power plant, a first energy storage device for the first renewable energy power plant, a second energy storage device for the second renewable energy power plant, a first line supplying power produced at the first renewable energy power plant to a first substation, a second line supplying power produced at the second renewable energy power plant to a second substation, and an integrated line supplying power produced at the first substation and the second substation to a user, and the reference capacity of the integrated line is the reference capacity of the first line. The amount of power supplied to the user through the integrated line is equal to the sum of the sub-capacity and the reference capacity of the second line and is less than the reference capacity of the integrated line, and the energy management system may include an energy management system that receives power amount information representing the amount of power produced at the first renewable energy power plant, the amount of power stored in the first energy storage device, the amount of power produced at the second renewable energy power plant, and the amount of power stored in the second energy storage device, and determines an operating mode for each of the first energy storage device and the second energy storage device based on the received power amount information. Effect of the Invention

[0011] According to the disclosed embodiment, even if new renewable energy power plants are added, the lines can be operated without adding more lines by adjusting the load on the lines using an energy storage system, thereby reducing the investment costs for adding lines.

[0012] According to the disclosed embodiments, even if the amount of power that needs to be supplied through the aggregated line is less than the reference capacity of the aggregated line, the power system can be managed to supply a corresponding amount of power.

[0013] According to the disclosed embodiment, through communication between power plants, substations and / or corresponding energy storage devices of a power system, the charge / discharge power amounts of ESSs located in different regions may be appropriately determined. [Brief description of the drawings]

[0014] The present disclosure can be readily understood in conjunction with the following detailed description and the accompanying drawings, in which Reference Numerals refer to structural elements.

[0015] [Figure 1] 1 illustrates a power system for controlling the power capacity of a line for supplying power produced at a renewable energy power plant to a power grid according to one embodiment.

[0016] [Diagram 2] FIG. 1 is a block diagram showing a configuration of an energy storage system according to one embodiment.

[0017] [Diagram 3] 1 is a block diagram showing a configuration of a power conversion device according to an embodiment;

[0018] [Figure 4] 1 is a graph illustrating an operation of an energy storage system according to an embodiment according to the amount of electricity generated in a renewable energy power plant.

[0019] [Diagram 5] 1 illustrates a power system that controls the power capacity of an aggregate line for supplying power produced by multiple renewable energy power plants to a power grid via multiple substations according to one embodiment.

[0020] [Figure 6] 1 illustrates an example of the operation of an energy management system according to one embodiment.

[0021] [Figure 7] 4 is a graph for explaining an example of the operation of an energy management system according to an embodiment.

[0022] [Figure 8] 1 is an example of an energy management system architecture according to one embodiment.

[0023] [Figure 9] 4 is a flow chart illustrating an example method of operating an energy management system according to one embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] Hereinafter, various embodiments will be described in detail with reference to the drawings. The embodiments described below may be modified and implemented in various different forms. In order to more clearly describe the features of the embodiments, detailed descriptions of matters that are well known to those skilled in the art to which the following embodiments belong will be omitted.

[0025] On the other hand, in this specification, when a certain component is "connected" to another component, this includes not only the case where the component is "directly connected" but also the case where the component is "connected via another component in between." In addition, when a certain component is said to "include" another component, this does not exclude the other component, but means that the other component may be further included, unless otherwise specified.

[0026] In addition, terms including ordinal numbers such as "first" or "second" as used in this specification may be used to describe various components, but the components should not be limited by the terms. The terms are used only to distinguish one component from another.

[0027] Throughout this specification, "new renewable energy" refers to a combination of new energy and renewable energy. "New energy" refers to energy that uses conventional fossil fuels by converting them, or uses electricity or heat through chemical reactions with hydrogen, oxygen, etc. For example, types of new energy may include hydrogen energy, fuel cells, and coal liquefied gas. "Renewable energy" refers to energy that uses renewable energy by converting it, including sunlight, water, geothermal heat, precipitation, and biological organisms. For example, types of renewable energy may include sunlight, solar heat, wind power, hydroelectric power, marine energy, geothermal heat, bioenergy, and waste energy.

[0028] Throughout this specification, "new renewable energy power plant" means a location where new renewable energy is converted into electrical energy to generate electricity.

[0029] Throughout this specification, the term "energy storage system" refers to a method of storing excess power and using it when there is a shortage or transmitting it to a place where it is needed. The energy storage system can store a portion of the power supplied from a power plant and discharge the stored power when there is a shortage of power.

[0030] Throughout this specification, a "line" refers to a passageway that is connected to a renewable energy power plant and an energy storage system and supplies power transmitted from the renewable energy power plant or the energy storage system to a load. For example, a line supplies power transmitted from the renewable energy power plant and / or the energy storage system to a substation.

[0031] The "reference capacity" of a line means the amount of power that can be transmitted through the line. The reference capacity of a line may be the maximum transmission capacity of the line or a preset transmission capacity. That is, the reference capacity of a line and the amount of power actually transmitted (or supplied) through the line may have different values. For example, the amount of power actually supplied through the line is smaller than the reference capacity of the line.

[0032] FIG. 1 shows a power system for controlling the power capacity of a line 300 for supplying power produced by a new renewable energy power plant 100 to a power grid according to one embodiment.

[0033] 1, the power system is composed of a new renewable energy power plant 100, an energy storage system 200, a line 300, and a load 400. For example, the load 400 may be a substation, a distribution line, an industrial complex, an urban load, etc.

[0034] The renewable energy power plant 100 according to an embodiment may be an electric power station that converts the renewable energy into electrical energy to generate electricity. That is, the renewable energy power plant can convert the flow of the renewable energy into mechanical energy and then convert it into electricity using the electromagnetic induction phenomenon.

[0035] For example, the renewable energy power plant 100 may be a solar power plant, a wind power plant, a tidal power plant, a wave power plant, a fuel cell power plant, and / or a bio-power plant, etc., without being limited to the above examples.

[0036] A substation according to an embodiment may be a facility for changing the nature of voltage and / or current in the process of receiving power generated from a power plant via a line and supplying it to a user (or consumer). For example, the substation may be a step-up substation that increases the generated voltage, or a step-down substation that decreases the generated voltage.

[0037] In one embodiment, a substation may include a primary substation that initially receives power from a power plant and regulates the voltage, and / or a secondary substation that steps down the power before supplying it to a power user.

[0038] The energy storage system 200 according to an embodiment can charge all or a part of the power produced in the renewable energy power plant 100 to the energy storage device 250, or discharge the power charged in the energy storage device 250 depending on the state of the line 300 or the load 400. For example, it is assumed that the line 300 can transmit power only up to a reference capacity. If the power produced in the renewable energy power plant 100 exceeds the reference capacity, a storage space for storing the excess power or an additional line for accommodating the excess power is required. The energy storage system 200 can store the excess power and supply it when needed without installing an additional line.

[0039] For example, when the power produced by the new renewable energy power plant 100 exceeds the reference capacity of the line 300, the energy storage system 200 can charge only the amount of power produced by the new renewable energy power plant 100 that exceeds the reference capacity of the line 300. By charging the excess power to the energy storage system 200, the capacity of the line 300 can be maintained at the reference capacity.

[0040] For example, if the power produced by the new renewable energy power plant 100 does not exceed the reference capacity of the line 300, the line 300 can additionally accommodate power other than the power produced by the new renewable energy power plant 100. In this case, the energy storage system 200 can discharge all or a part of the charged power to the line 300.

[0041] That is, the energy storage system 200 can control the operation of the energy storage system 200 so that the capacity of the power flowing through the line 300 is equal to the reference capacity.

[0042] By using the energy storage system described in this figure, even if a new renewable energy power plant 100 is added, the power system including the power plant, the transmission and distribution line, and / or the load can operate and stabilize the system without adding additional lines for the added new renewable energy power plant 100. In other words, the power system can reduce the cost of adding lines through the energy storage system described in this figure. In addition, the power system can stabilize the power system by using existing facilities as they are even when adding a new renewable energy power plant 100 through the energy storage system described in this figure.

[0043] FIG. 2 is a block diagram illustrating a configuration of an energy storage system 200 according to one embodiment.

[0044] Referring to FIG. 2, the energy storage system 200 may include a breaker and MOF 210, a grid-tied transformer 220, a power conversion device 230, an energy storage device 250, and / or a power management device 240. However, not all of the components shown are required. The energy storage system 200 may be implemented with more components than those shown, or may be implemented with fewer components. The aforementioned components are described below. The energy storage system 200 shown in FIG. 2 may correspond similarly to the energy storage system 200 shown in FIG. 1.

[0045] In one embodiment, the circuit breaker and MOF 210 can monitor whether abnormal voltage, abnormal current, abnormal frequency, or abnormal temperature is detected on the energy storage system 200 to protect the energy storage system 200, and can stop operation of the energy storage system 200 when an abnormality occurs.

[0046] According to an embodiment, the grid-connection transformer 220 can adjust the voltage magnitude to supply power to the power grid side. Since power loss occurs due to the resistance of the line 300, the grid-connection transformer 220 can supply power by increasing the voltage magnitude.

[0047] The energy storage device 250 according to an embodiment can store energy produced by the renewable energy power plant 100. For example, the energy storage device 250 can include a battery and a battery management module. The battery can discharge or charge the power charged via the power conversion device 230 depending on the operation mode of the energy storage device 250. The battery management module can manage the status information of the battery.

[0048] According to an embodiment, the power management device 240 can monitor the amount of power of the new renewable energy power plant 100. The power management device 240 can determine an operation mode of the energy storage device 250 based on the result of monitoring the reference capacity and amount of power of the line 300 connected to the new renewable energy power plant 100. The power management device 240 can control the amount of power flowing through the line 300 depending on the operation mode of the energy storage device 250.

[0049] According to an embodiment, the power conversion unit 230 can receive instructions corresponding to an operation mode of the energy storage unit 250 from the power management unit 240 and control the operation of the energy storage unit 250 according to the instructions.

[0050] For example, the power management device 240 may acquire status information, operation information, driving information, and / or operable information of the power conversion device 230 from the power conversion device 230. The status information of the power conversion device 230 may be information such as an operating state, circuit breaker information, and a network. The operation information of the power conversion device 230 may be information such as a voltage, a current, a power, a frequency, and an inverter. The operation information of the power conversion device 230 may be information such as an operation mode, a charge amount, a discharge amount, a cumulative charge amount, and a cumulative discharge amount. The operable information of the power conversion device 230 may be information such as an abnormal voltage, an abnormal current, an abnormal frequency, and an abnormal temperature for protecting the power conversion device 230.

[0051] For example, the power management unit 240 may communicate with the battery management module to obtain information such as the battery circuit breaker status, temperature, voltage, current, power, charge amount, discharge amount, cumulative charge amount, cumulative discharge amount, and battery operational information.

[0052] For example, when the amount of power of the renewable energy power plant 100 exceeds the reference capacity of the line 300, the power management device 240 may determine the operation mode of the energy storage device 250 to be the charging mode. The power management device 240 may transmit a first command to the power conversion device 230 to control the energy storage device 250 to store the excess power of the amount of power exceeding the reference capacity of the line 300. The power conversion device 230 may store the excess power in the energy storage device 250 according to the first command. The energy storage device 250 may store the DC power converted to DC.

[0053] As another example, when the amount of power of the new renewable energy power plant 100 does not exceed the reference capacity of the line 300, the power management device 240 may determine the operation mode of the energy storage device 250 to be the discharge mode. The power management device 240 may transmit a second command to the power conversion device to discharge the power charged in the energy storage device 250 based on the amount of power of the new renewable energy power plant 100 so that the power capacity flowing through the line 300 is equal to the reference capacity. The power conversion device 230 can discharge the power charged in the energy storage device 250 according to the second command.

[0054] For example, when a newly installed new renewable energy power plant 100 is connected to the energy storage system 200 and the line 300 in addition to the new renewable energy power plant 100, the power management device 240 can determine the operation mode of the energy storage device 250 based on the result of monitoring the amount of power of the new renewable energy power plant 100 and the newly installed new renewable energy power plant 100 and the reference capacity of the line 300. In other words, even if the new renewable energy power plant 100 is additionally installed, the power exceeding the reference capacity of the line 300 can be charged into the energy storage device 250, thereby contributing to stabilization of the power system without the need to add the line 300.

[0055] For example, the power management device 240 may obtain historical information about the amount of power produced by the new renewable energy power plant 100. The power management device 240 may predict the amount of power demand of the new renewable energy power plant 100 to be newly installed based on the historical information, the storage capacity of the energy storage device 250, and the reference capacity of the line 300. For example, the power management device 240 may obtain information about the amount of power produced during a preset time period by the new renewable energy power plant 100. The power management device 240 may calculate the average amount of power during a preset period based on the information about the amount of power. The power management device 240 may predict the amount of power demand based on the average amount of power of the new renewable energy power plant 100, the storage capacity of the energy storage device 250, and the reference capacity of the line 300.

[0056] For example, the power management device 240 may generate modeling information including information on the type of new renewable energy power plant 100 to be newly installed and the operation schedule corresponding to the type based on the amount of demanded power.

[0057] For example, the energy storage device 250 may include a battery and a battery management module. The battery can store DC power obtained by converting the power of the new renewable energy power plant 100 from AC to DC via the power converter 230. For example, when the amount of power of the new renewable energy power plant 100 exceeds the reference capacity of the line 300, the battery can store power via the DC converter. In addition, the battery can discharge the charged power to the power grid via the power converter 230. For example, when the amount of power of the new renewable energy power plant 100 does not exceed the reference capacity of the line 300 or when the power grid line 300 is restored from a fault, the battery can discharge the charged power to the power grid.

[0058] The battery management module may obtain status information such as the operating state of the battery, the remaining capacity of the battery, the durability of the battery, the temperature, the voltage, the current, the charge amount, the discharge amount, etc. The battery management module may trip the circuit breaker if an abnormal condition is detected in the battery.

[0059] The battery management module may provide battery status information to the power management unit 240 by communicating with the power management unit 240. The power management unit 240 may use the battery status information provided by the battery management module to efficiently manage the battery.

[0060] The energy storage device 250 may also include a circuit breaker that cuts off the DC power supply from the power conversion device 230 when an abnormality occurs, and a fuse that protects the battery when an overcurrent occurs.

[0061] The power management device 240 can efficiently control the operation of charging or discharging the energy storage system 200 by monitoring the amount of power of the new renewable energy power plant 100. Therefore, even if the new renewable energy power plant 100 is newly installed, the line 300 can be operated without adding an additional line 300 by adjusting the load of the line 300 using the energy storage system 200.

[0062] Meanwhile, the scatter controller 450 can acquire information on power operation such as current and voltage by communicating with the substation 410. The scatter controller 450 can also acquire and monitor fault information on the power transmission end transformer and fault information on the power transmission line 300. The power management device 240 can acquire operation information on the power system, fault information on the power transmission end transformer, and fault information on the power transmission line 300 by communicating with the scatter controller 450.

[0063] FIG. 3 is a block diagram showing a configuration of a power conversion device 230 according to an embodiment.

[0064] Referring to FIG. 3 , the power conversion device 230 may include a controller 310 , an AC circuit breaker 320 , an EMC filter 330 , an AC filter 340 , an inverter 350 , a DC link 360 , an EMC filter 370 , and a DC circuit breaker 380 .

[0065] The controller 310 may control the operation of the AC circuit breaker 320 , the EMC filter 330 , the AC filter 340 , the inverter 350 , the DC link 360 , the EMC filter 370 , and the DC circuit breaker 380 .

[0066] The AC circuit breaker 320 can cut off the power system side when an abnormality occurs in the power system. The EMC filter 330 can reduce noise generated in the inverter. The AC filter 340 can reduce harmonics to make it a sine wave. The inverter 350 can be controlled to convert AC power into DC power. The DC link 360 can smooth the converted pulsating current into DC. The EMC filter 370 can reduce noise on the DC side. The DC circuit breaker 380 can cut off the DC power supply when an abnormality occurs in the DC power supply of the energy storage device 250.

[0067] Not all of the components shown in Fig. 3 are required components. The power conversion device 230 may be implemented with more components than those shown in Fig. 3, or may be implemented with fewer components. The power conversion device 230 shown in Fig. 3 may correspond similarly to the power conversion device 230 shown in Fig. 2. The components of the power conversion device 230 may operate as follows:

[0068] The power conversion device 230 receives instructions corresponding to the operation mode of the energy storage device 250 from the power management device 240, and can control the operation of the energy storage device 250 to charge the energy storage device 250 with electricity from the renewable energy power plant 100 or to discharge the electricity stored in the energy storage device 250 in accordance with the instructions.

[0069] For example, when the amount of power generated by the renewable energy power plant 100 exceeds the reference capacity of the line 300, the power conversion device 230 can receive a command corresponding to a charging mode by communicating with the power management device 240 and charge the energy storage device 250 with power generated by the renewable energy power plant 100.

[0070] For example, when the amount of power generated by the renewable energy power plant 100 does not exceed the reference capacity of the line 300, the power conversion device 230 can receive a command corresponding to a discharge mode by communicating with the power management device 240 and discharge the power stored in the energy storage device 250 to the power grid via the line 300.

[0071] For example, the power conversion device 230 may provide status, operational, driving, and operational information of the power conversion device 230 to the power management device 240 to ensure that the energy storage system 200 is operated efficiently.

[0072] For example, the power conversion device 230 can monitor whether an abnormal voltage, an abnormal current, an abnormal frequency, an abnormal temperature, etc. is detected in the energy storage system 200, and can stop the operation of the energy storage system 200 if an abnormal state is detected.

[0073] FIG. 4 is a graph illustrating the operation of the energy storage system 200 according to the amount of power generated by the renewable energy power plant 100 according to an embodiment.

[0074] For example, it is assumed that the new renewable energy power plant 100 includes a solar power plant, a first wind power plant, and a second wind power plant. It is also assumed that the reference capacity of the line 300 is 80 MW. It is also assumed that the first wind power plant and the second wind power plant are existing new renewable energy power plants 100, and the solar power plant is a newly added new renewable energy power plant 100. It is also assumed that the maximum combined capacity between the first wind power plant and the second wind power plant is 80 MW, and the maximum capacity of the solar power plant is 20 MW.

[0075] Referring to FIG. 4 , a first graph 610 shows the amount of power of the solar power plant, a second graph 620 shows the amount of power of the first wind power plant, a third graph 630 shows the amount of power of the second wind power plant, a fourth graph 640 shows the total amount of power of the solar power plant, the first wind power plant and the second wind power plant, and a fifth graph 650 shows the reference capacity of the line 300.

[0076] 4, in a section 601 from t0 to t1, the total amount of power does not exceed the reference capacity of the line 300. In a section 602 from t1 to t2, the total amount of power exceeds the reference capacity of the line 300. In a section 603 from t2 to t3, the total amount of power does not exceed the reference capacity of the line 300.

[0077] For example, the energy storage system 200 can determine the operation mode of the energy storage device 250 to be a discharge mode for a section where the total amount of power does not exceed the reference capacity of the line 300, and discharge the power charged in the energy storage device 250. That is, if the amount of power produced in the new renewable energy power plant 100 is less than the reference capacity of the line 300, the line 300 has a surplus capacity, so the energy storage system 200 can discharge the charged power to the line 300. In this case, each new renewable energy power plant 100 can transmit the generated power through the line 300. As shown in FIG. 4, the energy storage system 200 can control the operation of the energy storage system 200 according to the discharge schedule in a section 601 from t0 to t1 and a section 603 from t2 to t3.

[0078] For example, for a section where the total amount of power exceeds the reference capacity of the line 300, the energy storage system 200 can determine the operation mode of the energy storage device 250 to be the charging mode and charge power to the energy storage device 250. In this case, the energy storage system 200 can charge the energy storage device 250 by the amount of excess power that exceeds the reference capacity. As shown in Fig. 4, the energy storage system 200 can control the operation of the energy storage system 200 according to the charging schedule in the section 602 from t1 to t2.

[0079] FIG. 5 illustrates a power system that controls the power capacity of an integrated line for supplying power produced by multiple new renewable energy power plants to a power grid via multiple substations according to one embodiment.

[0080] This figure is a diagram for explaining an example of a power supply process in a power system when there are multiple substations (e.g., a first substation 508 and a second substation 509) corresponding to multiple new renewable energy power plants (e.g., a first new renewable energy power plant 501 and a second new renewable energy power plant 504) according to one embodiment.

[0081] For the power supply of the power system according to an embodiment, the power system may include a first renewable energy power plant 501, a first energy storage device 502, a second renewable energy power plant 504, a second energy storage device 505, a first line 506, a second line 507, a first substation 508, a second substation 509, an integrated line 510, and / or a power user 511. For the power supply of the power system according to an embodiment, one or more modules not shown in this figure may be further used. The description of the first renewable energy power plant 501 and the second renewable energy power plant 504 may be the same as the description of the renewable energy power plant 100 described above in FIG. 1-FIG. 4. The description of the first energy storage device 502 and the second energy storage device 505 may be the same as the description of the energy storage device 250 described above in FIG. 1-FIG. 4. The description of the first substation 508 and the second substation 509 may be the same as the description of the substations described above in Figures 1 to 4. The description of the first line 506 and the second line 507 may be the same as the description of the line 300 described above in Figures 1 to 4.

[0082] According to one embodiment, a first new renewable energy power plant 501 and a first energy storage device 502 may be located in a first region 500. Also, a second new renewable energy power plant 504 and a second energy storage device 505 may be located in a second region 503. The first region 500 and the second region 503 may be different regions. That is, the power grid shown in this figure shows an example of a system that supplies power produced in multiple regions to power users.

[0083] The aggregated line 510 according to one embodiment may be a line for supplying power produced (or converted) in the first substation 508 and the second substation 509 to a user 511. That is, even if power is produced in multiple power plants and / or substations on a power grid, the entire power may be supplied to the final power user 511 via a single aggregated line 510. One or more pieces of equipment (e.g., a power distribution transmission tower) not shown in this figure may further be included between the aggregated line 510 and the user 511.

[0084] Electricity produced (or generated) at the first renewable energy power plant 501 according to an embodiment may be supplied to a first substation 508 via a first line 506. Electricity produced at the second renewable energy power plant 504 according to an embodiment may be supplied to a second substation 509 via a second line 507. Electricity produced at the first substation 508 and the second substation 509 according to an embodiment may be supplied to a user 511 via an integrated line 510.

[0085] The reference capacitance of the integrated line 510 according to one embodiment may be equal to the sum of the reference capacitance of the first line 506 and the reference capacitance of the second line 507. The description of the reference capacitance of the lines is the same as that described above with reference to FIGS.

[0086] In general, the amount of power that must be supplied to a user through the integrated line 510 may be the same as the reference capacity of the integrated line 510. However, there are cases where an amount of power less than the reference capacity of the integrated line must be supplied to a user through the integrated line 510. For example, when a safety problem occurs on the user 511 side or the integrated line 510 side, when the amount of power produced by the power plant and the substation is significantly small, etc., the maximum power that must be continuously transmitted through the integrated line may be less than the reference capacity of the integrated line 510. Therefore, in this case as well, a system that can constantly supply an amount of power less than the reference capacity of the integrated line 510 through the integrated line 510 is required.

[0087] Also, as described above with reference to FIGS. 1 to 4, a general energy storage system (ESS) may charge or discharge power based on the amount of power generated by a corresponding renewable energy power plant and the reference capacity of the line. However, if the amount of power that should be supplied through the integrated line 510 is less than the reference capacity of the integrated line 510, the amount of power that should be supplied through the integrated line 510 may not be supplied using only the conventional ESS charging / discharging method. For example, if the conventional ESS charging / discharging method is used alone, only the amount of power equal to the reference capacity of the integrated line 510 may be supplied through the integrated line 510. Therefore, in this case, a system is also needed that determines the amount of power to be charged / discharged by ESSs located in different regions through communication between power plants, substations, and / or corresponding energy storage devices.

[0088] FIG. 6 illustrates an example of the operation of an energy management system according to one embodiment.

[0089] This figure illustrates an example of the operation of the energy management system 700 according to an embodiment. The energy management system 700 illustrated in this figure can solve the problem described above in FIG. 5. That is, the energy management system 700 according to an embodiment can manage the power system to supply a corresponding amount of power even if the amount of power that must be supplied through the integrated line 510 is less than the reference capacity of the integrated line 510. In addition, the energy management system 700 according to an embodiment can appropriately determine the amount of charge / discharge power of the ESS located in different regions through communication between power plants, substations, and / or corresponding energy storage devices of the power system.

[0090] As shown in this figure, the energy management system 700 may be added to the power system previously described in FIG.

[0091] As described above, when the amount of power to be supplied through the integrated line 510 is less than the reference capacity of the integrated line 510, the energy management system 700 may manage the power system to supply an amount of power less than the reference capacity of the integrated line 510 through the integrated line 510. Specifically, the energy management system 700 may manage the amount of power supplied to the integrated line 510 through communication with energy storage devices located in a plurality of regions. For example, the energy management system 700 determines the amount of power that a power plant in each region must supply to a corresponding substation based on the amount of power stored in each of a plurality of energy storage devices located in a plurality of regions.

[0092] The energy management system 700 may receive power amount information representing the amount of power produced by the first renewable energy power plant 501, the amount of power stored in the first energy storage device 502 for the first renewable energy power plant 501, the amount of power produced by the second renewable energy power plant 504, and the amount of power stored in the second energy storage device 505 for the second renewable energy power plant 504. For example, the energy management system 700 may receive the above-mentioned power amount information through communication with the SCADA controller 450 connected to the energy storage devices 502 and 505.

[0093] The energy management system 700 may determine an operation mode for each of the first energy storage device 502 and the second energy storage device 505 based on the received power amount information. The operation modes may be the same as or similar to the operation modes described above in Figures 1 to 4. For example, the operation modes described in this figure are the same as the operation modes described above in Figures 1 to 4 in that they indicate a charging or discharging mode, but the amount of charging or discharging according to each mode is different from those described above in Figures 1 to 4.

[0094] The operating mode determined by the energy management system 700 may include at least one of a first charging mode indicative of charging the first energy storage device 502, a first discharging mode indicative of discharging the first energy storage device 502, a second charging mode indicative of charging the second energy storage device 505, or a second discharging mode indicative of discharging the second energy storage device 505. That is, the operating mode determined by the energy management system 700 may indicate operating modes for two or more energy storage devices. For example, the operating mode indicates a charging mode for the first energy storage device 502 and a discharging mode for the second energy storage device 505.

[0095] The first energy storage device 502 and the second energy storage device 505 may store different amounts of power. Therefore, when charging or discharging power to the first energy storage device 502 and the second energy storage device 505, more efficient charging / discharging can be achieved by taking into account the amount of power stored in each energy storage device. However, the charging / discharging method of the conventional energy storage system described above with reference to FIGS. 1 to 4 may not take into account the amount of power stored in the energy storage devices.

[0096] As previously described, the energy management system 700 may determine an operating mode for the energy storage devices based on the received amount of power. That is, the energy management system 700 may determine an operating mode for each of the energy storage devices based on the amount of power stored in the first energy storage device 502 and / or the amount of power stored in the second energy storage device 505. For example, if both the first energy storage device 502 and the second energy storage device 505 are determined to be in a discharging mode, the energy management system 700 discharges each of the first energy storage device 502 and the second energy storage device 505 according to a proportion of the amount of power stored.

[0097] The energy management system 700 may determine a first distribution criterion that sets the amount of charge or discharge in each operation mode of the first energy storage device 502 and the second energy storage device 505 based on the power amount information. The energy management system 700 may control the charging or discharging operation of the first energy storage device 502 and the second energy storage device 505 according to the first distribution criterion.

[0098] On the other hand, if it is predicted that the first amount of power supplied through the first line 506 will exceed the reference capacity of the first line 506 or the second amount of power supplied through the second line 507 will exceed the reference capacity of the second line 507 by operating in the operation mode according to the first distribution criterion, the energy management system 700 may determine a second distribution criterion that sets the charge amount or discharge amount for each operation mode of the first energy storage device 502 and the second energy storage device 505 based on the power amount information and the line reference capacity information so that the first amount of power does not exceed the reference capacity of the first line 506 and the second amount of power does not exceed the reference capacity of the second line 507. The energy management system 700 may control the charge operation or discharge operation of the first energy storage device 502 and the second energy storage device 505 according to the second distribution criterion. The second distribution standard takes into account not only the amount of electricity produced by the renewable energy power plant and the amount of electricity stored in the energy storage device, but also the reference capacity of the line, so that the energy management system 700 can provide a schedule that allows for a stable supply of electricity through the integrated line 510.

[0099] Tables 1 to 3 described below are tables for explaining the operation of the energy management system 700 when 400 MW of power is stored in the first energy storage device 502, 600 MW of power is stored in the second energy storage device 505, the amount of power (user-supplied power) that must be supplied via the integrated line 510 is 700 MW, the reference capacity of the integrated line 510 is 1000 MW, the reference capacity of the first line 506 is 500 MW, and the reference capacity of the second line 507 is 500 MW (hereinafter, conditions).

[0100] [Table 1]

[0101] As shown in Table 1, under the above conditions, each of the first renewable energy power plant 501 and the second renewable energy power plant 504 can produce 600 [MW] of power. Therefore, similar to the operation mode determination method described above in Figs. 1 to 4, the energy management system 700 can determine a charging mode for each of the first energy storage device 502 and the second energy storage device 505. However, as described above, the charging amount according to the charging mode determined by the energy management system 700 may differ from the charging amount according to the charging mode described above in Figs. 1 to 4.

[0102] As shown in Table 1, since the amount of user-supplied power is 700 [MW], the first energy storage device 502 and the second energy storage device 505 must charge a total of 500 [MW] of power. The energy management system 700 can distribute the 500 [MW] of power that must be charged to each of the first energy storage device 502 and the second energy storage device 505 based on the ratio of the amount of power stored in the energy storage device.

[0103] For example, as in the above-mentioned condition, the amount of power stored in the first energy storage device 502 and the second energy storage device 505 is 2:3, so the energy management system 700 distributes the amount of power charge in the inverse of that ratio. That is, the energy management system 700 stores 300 [MW] of power in the first energy storage device 502 and 200 [MW] in the second energy storage device 505, and supplies a total of 700 [MW] of power to the integrated line 510.

[0104] That is, when the operation mode includes a first charging mode and a second charging mode, the charging amount by the first charging mode and the charging amount by the second charging mode may be determined based on the amount of power stored in the first energy storage device 502 and the amount of stored power stored in the second energy storage device 505. For example, the ratio of the charging amount by the second charging mode to the charging amount by the first charging mode may be the same as the ratio of the amount of power stored in the first energy storage device 502 to the amount of power stored in the second energy storage device 505.

[0105] [Table 2]

[0106] As shown in Table 2, under the above conditions, the first renewable energy power plant 501 and the second renewable energy power plant 504 can produce 200 [MW] and 250 [MW] of power, respectively. Therefore, similar to the operation mode determination method described above in FIGS. 1 to 4, the energy management system 700 can determine the discharge mode for each of the first energy storage device 502 and the second energy storage device 505. However, as described above, the discharge amount according to the discharge mode determined by the energy management system 700 may differ from the discharge amount according to the discharge mode described above in FIGS. 1 to 4.

[0107] As shown in Table 2, since the amount of user-supplied power is 700 [MW], the first energy storage device 502 and the second energy storage device 505 must discharge a total of 250 [MW] of power. The energy management system 700 can distribute the 250 [MW] of power that must be discharged to each of the first energy storage device 502 and the second energy storage device 505 based on the ratio of the amount of power stored in the energy storage devices.

[0108] For example, as in the above-mentioned condition, the amount of power stored in the first energy storage device 502 and the second energy storage device 505 is 2:3, so the energy management system 700 distributes the amount of discharged power in that ratio. That is, the energy management system 700 discharges 100 [MW] of power from the first energy storage device 502 and 150 [MW] from the second energy storage device 505, and supplies a total of 700 [MW] of power to the integrated line 510.

[0109] That is, when the operation mode includes a first discharge mode and a second discharge mode, the discharge amount by the first discharge mode and the discharge amount by the second discharge mode may be determined based on the amount of power stored in the first energy storage device 502 and the amount of power stored in the second energy storage device 505. For example, the ratio of the amount of power discharged by the second discharge mode to the amount of power discharged by the first discharge mode may be the same as the ratio of the amount of power stored in the second energy storage device 505 to the amount of power stored in the first energy storage device 502.

[0110] [Table 3]

[0111] As shown in Table 3, under the above conditions, the first renewable energy power plant 501 and the second renewable energy power plant 504 can produce 550 [MW] and 50 [MW] of power, respectively. Therefore, similar to the operation mode determination method described above in FIG. 1 to FIG. 4, the energy management system 700 may determine the charge mode for the first energy storage device 502 and the discharge mode for the second energy storage device 505. However, as described above, the charge / discharge amount according to the charge / discharge mode determined by the energy management system 700 may differ from the charge / discharge amount according to the charge / discharge mode described above in FIG. 1 to FIG. 4.

[0112] As shown in Table 3, since the amount of user-supplied power is 700 [MW], the sum of the charged amount of the first energy storage device 502 and the discharged amount of the second energy storage device 505 may be 100 [MW]. In this case, the energy storage device can set the ratio of the amount of power supplied to the first substation 508 via the first line 506 and the amount of power supplied to the second substation 509 via the second line 507 to the ratio of the amount of power stored in each of the first energy storage device 502 and the second energy storage device 505.

[0113] For example, as in the above-mentioned condition, the amount of power stored in the first energy storage device 502 and the second energy storage device 505 is 2:3, so the energy management system 700 determines the amount of charge or discharge for each of the first energy storage device 502 and the second energy storage device 505 so that the amount of power supplied to the first substation 508 via the first line 506 and the amount of power supplied to the second substation 509 via the second line 507 are set at that ratio. That is, the energy management system 700 charges the first energy storage device 502 with 250 [MW] of power, discharges 150 [MW] of power from the second energy storage device 505, and supplies a total of 700 [MW] of power to the integrated line 510.

[0114] As described above, when the operation modes determined for the first energy storage device 502 and the second energy storage device 505 are different from each other, the charge amount or discharge amount may be determined in a manner different from the manner described in Tables 1 to 2.

[0115] That is, the operation modes may include a first charging mode and a second discharging mode, or may include a first discharging mode and a second charging mode. In this case, the ratio of the amount of power supplied to the first substation 508 via the first line 506 to the amount of power supplied to the second substation 509 via the second line 507 may be the same as the ratio of the amount of power stored in the second energy storage device 505 to the amount of power stored in the first energy storage device 502.

[0116] [Table 4]

[0117] Table 4 is a table for explaining a case where 50 [MW] of power is stored in first energy storage device 502 and 450 [MW] of power is stored in second energy storage device 505, which differs from the conditions applied to Tables 1 to 3. The other conditions are the same as the conditions applied to Tables 1 to 3 described above.

[0118] As shown in Table 3, under the above conditions, each of the first renewable energy power plant 501 and the second renewable energy power plant 504 can produce 600 [MW] of power. Also, as described above in Table 1, since the ratio of the amount of power stored in the first energy storage device 502 and the amount of power stored in the second energy storage device 505 is 1:9, the energy management system 700 can charge the first energy storage device 502 with 450 [MW] of power and the second energy storage device 505 with 50 [MW] of power.

[0119] However, if the method described above in Table 1 is applied as is, the amount of power (550 [MW]) supplied through the second line 507 may be greater than the reference capacity (500 [MW]) of the second line 507. In this case, the energy management system 700 can modify the charge distribution method.

[0120] For example, if the amount of power that must be supplied through a particular line as a result of distribution according to the distribution method described above in Tables 1 to 3 exceeds the reference capacity of the line, the energy management system 700 further stores the excess amount of power in the energy storage device corresponding to the line.

[0121] For example, as shown in Table 4, as a result of the energy management system 700 distributing the power in the distribution manner described above in Table 1, the amount of power that must be supplied through the second line 507 exceeds the reference capacity of the second line 507 by 50 MW of power, so the excess amount of 50 MW of power is further stored in the second energy storage device 505 corresponding to the second line 507.

[0122] In addition, the energy management system 700 may manage the amount of power supplied through the integrated line 510 by the method described above in FIGS. 1 to 4, instead of the method described above in Tables 1 to 4. In this case, the amount of power that must be supplied through the integrated line 510 may be the same as the reference capacity of the integrated line 510. That is, the energy management system 700 may maintain the amount of power supplied through the integrated line 510 constant (e.g., maintain the amount of power at the reference capacity of the integrated line 510) by maintaining the amount of power supplied through the first line 506 and the second line 507 constant (e.g., maintain the amount of power at the reference capacity of the integrated line 510) by the method described above in FIGS. 1 to 4. The method of the energy management system 700 to maintain the amount of power supplied to the first line 506 and / or the second line 507 constant is the same as or similar to the method of the energy storage system 200 described above in FIGS. 1 to 4 to maintain the amount of power supplied to the line 300 constant.

[0123] The energy management system 700 according to an embodiment can manage the power system to supply a corresponding amount of power even if the amount of power that must be supplied through the aggregated line 510 connected to multiple substations by the method described in this figure is less than the reference capacity of the aggregated line 510. In particular, the energy management system 700 can appropriately determine the amount of charge / discharge power of the ESS located in different regions through communication between the power plants, substations, and / or corresponding energy storage devices of the power system.

[0124] FIG. 7 is a graph for explaining an example of the operation of the energy management system according to an embodiment.

[0125] This figure is a graph illustrating an example of the operation of the energy management system 700 according to one embodiment (the operation described above with reference to FIGS. 5 to 6).

[0126] As shown in this figure, the amount of power 702 that must be supplied through the integrated line 510 may have a certain value (e.g., 1000 [MW]). Also, as described above in Figures 5 to 6, the reference capacity of the integrated line 510 may be greater than the amount of power that must be supplied through the integrated line 510.

[0127] The amount of electricity 701 produced by the multiple power plants may be the sum of the amount of electricity 703 produced by the first new renewable energy power plant 501, the amount of electricity 704 produced by the second new renewable energy power plant 504, and / or the amount of electricity 705 produced by the new renewable energy power plant added as a new power plant. The newly added new renewable energy power plant may indicate a new renewable energy power plant newly established in the first region 500 and / or the second region 503 other than the first new renewable energy power plant 501 and the second new renewable energy power plant 504. That is, the amount of electricity 701 produced by the multiple power plants may include both the amount of electricity by conventional power plants and / or the amount of electricity by newly added power plants.

[0128] For example, the energy management system 700 may determine a discharge mode for the first energy storage device 502 and the second energy storage device 505 when the amount of power 701 produced by the multiple power plants is smaller than the amount of power 702 that must be supplied through the aggregated line 510 (in the sections from t0 to t1 and from t2 to t3). The method of calculating the discharge amount according to the discharge mode determined by the energy management device may be the same as the method described above in FIG. 6.

[0129] For example, the energy management system 700 may determine a charging mode for the first energy storage device 502 and the second energy storage device 505 when the amount of power 701 produced by the multiple power plants is greater than the amount of power 702 that must be supplied through the aggregated line 510 (the section from t1 to t2). The method of calculating the amount of charge according to the charging mode determined by the energy management device may be the same as the method described above in FIG. 6.

[0130] The energy management system 700 according to an embodiment can manage the power system to supply a corresponding amount of power even if the amount of power that must be supplied through the aggregated line 510 connected to multiple substations by the method described in this figure is less than the reference capacity of the aggregated line 510. In particular, the energy management system 700 can appropriately determine the amount of charge / discharge power of the ESS located in different regions through communication between the power plants, substations, and / or corresponding energy storage devices of the power system.

[0131] FIG. 8 is an example of an energy management system architecture according to one embodiment.

[0132] This figure is a block diagram illustrating an example of the structure of an energy management system 700 according to one embodiment. The energy management system 700 may include a receiver 800, a controller 801, an administrator HMI 802, a data storage device 803, an operator HMI 804, and / or a SCADA module 805. The energy management system 700 may further include one or more modules not shown in this figure.

[0133] The receiver 800 according to an embodiment may receive power amount information indicating the amount of power produced in the first renewable energy power plant 501, the amount of power stored in the first energy storage device 502 for the first renewable energy power plant 501, the amount of power produced in the second renewable energy power plant 504, and the amount of power stored in the second energy storage device 505 for the second renewable energy power plant 504. A detailed description of the power amount information is the same as that described above with reference to FIGS. 5 to 7.

[0134] According to an embodiment, the controller 801 may determine an operation mode for each of the first energy storage device 502 and the second energy storage device 505 based on the received power amount information. A detailed description of the method for determining the operation mode based on the received power amount information is the same as that described above with reference to FIGS. 5 to 7.

[0135] According to one embodiment, the data storage device 803 can store the received power information. Thus, the controller 801 can determine an operation mode based on the power information stored in the data storage device 803.

[0136] According to one embodiment, the administrator HMI (Human Machine Interface) 802 may be an energy management system 700 monitoring dashboard for an administrator of the energy management system 700. For example, the administrator of the energy management system 700 may monitor the operation of the energy management system 700 via the administrator HMI 802.

[0137] According to one embodiment, the operator HMI (Human Machine Interface) 804 may be an energy management system 700 monitoring dashboard for an operator of the energy management system 700. For example, an administrator of the energy management system 700 may monitor the operation of the energy management system 700 via the operator HMI 804.

[0138] According to an embodiment, a Supervisory Control And Data Acquisition (SCADA) module 805 (or SCADA system) can assist in receiving the above-mentioned power information for the receiver 800. That is, the receiver 800 can receive the power information based on the SCADA module 805. For example, the SCADA module 805 collects data on the amount of power produced by the first renewable energy power plant 501, the amount of power stored in the first energy storage device 502 for the first renewable energy power plant 501, the amount of power produced by the second renewable energy power plant 504, and the amount of power stored in the second energy storage device 505 for the second renewable energy power plant 504 for the receiver 800.

[0139] With the structure described in this figure, the energy management system 700 according to one embodiment can manage the power system to supply a corresponding amount of power even if the amount of power that needs to be supplied through the aggregated line 510 connected to multiple substations is less than the reference capacity of the aggregated line 510. In particular, the energy management system 700 can appropriately determine the amount of charge / discharge power of the ESS located in different regions through communication between the power plants, substations, and / or corresponding energy storage devices of the power system.

[0140] FIG. 9 is a flow chart illustrating an example method of operation of an energy management system according to one embodiment.

[0141] 7, which is a flow chart illustrating an example of a method of operation of the energy management system 700 according to one embodiment.

[0142] The method of operation of the energy management system 700 according to one embodiment may include step 900 of receiving power quantity information representing the amount of power produced at the first renewable energy power plant, the amount of power stored in the first energy storage device for the first renewable energy power plant, the amount of power produced at the second renewable energy power plant and the amount of power stored in the second energy storage device for the second renewable energy power plant, and / or step 901 of determining an operation mode for each of the first energy storage device and the second energy storage device based on the received power quantity information. The method of operation of the energy management system 700 may further include one or more steps not shown in this figure.

[0143] The power produced in the first renewable energy power plant 501 may be supplied to a first substation 508 via a first line 506. The power produced in the second renewable energy power plant 504 may be supplied to a second substation 509 via a second line 507. The power produced in the first substation 508 and the second substation 509 may be supplied to a user via an integrated line 510.

[0144] The reference capacitance of the integrated line 510 may be equal to the sum of the reference capacitance of the first line 506 and the reference capacitance of the second line 507. The amount of power delivered to the user through the integrated line 510 may be less than the reference capacitance of the integrated line 510.

[0145] The operating modes may include at least one of a first charging mode indicating charging of the first energy storage device 502, a first discharging mode indicating discharging of the first energy storage device 502, a second charging mode indicating charging of the second energy storage device 505, or a second discharging mode indicating discharging of the second energy storage device 505.

[0146] When the operating mode includes a first charging mode and a second charging mode, the amount of charging in the first charging mode and the amount of charging in the second charging mode may be determined based on the amount of power stored in the first energy storage device 502 and the amount of stored power stored in the second energy storage device 505.

[0147] For example, the ratio of the amount of charge in the second charging mode to the amount of charge in the first charging mode is the same as the ratio of the amount of power stored in the first energy storage device 502 to the amount of power stored in the second energy storage device 505.

[0148] When the operating mode includes a first discharge mode and the second discharge mode, the amount of discharge by the first discharge mode and the amount of discharge by the second discharge mode can be determined based on the amount of power stored in the first energy storage device 502 and the amount of power stored in the second energy storage device 505.

[0149] For example, the ratio of the amount of discharge in the second discharge mode to the amount of discharge in the first discharge mode is the same as the ratio of the amount of power stored in the second energy storage device 505 to the amount of power stored in the first energy storage device 502.

[0150] When the operating mode includes a first charging mode and the second discharging mode, or includes a first discharging mode and a second charging mode, the ratio of the amount of power supplied to the first substation 508 via the first line 506 to the amount of power supplied to the second substation 509 via the second line 507 may be the same as the ratio of the amount of power stored in the second energy storage device 505 to the amount of power stored in the first energy storage device 502.

[0151] Based on the power amount information, the energy management system 700 may determine a first distribution criterion that sets the amount of charging or discharging in each operation mode of the first energy storage device 502 and the second energy storage device 505. The energy management system 700 may control the charging or discharging operation of the first energy storage device 502 and the second energy storage device 505 according to the first distribution criterion.

[0152] On the other hand, if it is predicted that the first amount of power supplied through the first line 506 will exceed the reference capacity of the first line 506 or the second amount of power supplied through the second line 507 will exceed the reference capacity of the second line 507 by operating in the operation mode according to the first distribution criterion, the energy management system 700 may determine a second distribution criterion that sets the charge amount or discharge amount for each operation mode of the first energy storage device 502 and the second energy storage device 505 based on the power amount information and the line reference capacity information so that the first amount of power does not exceed the reference capacity of the first line 506 and the second amount of power does not exceed the reference capacity of the second line 507. The energy management system 700 may control the charge operation or discharge operation of the first energy storage device 502 and the second energy storage device 505 according to the second distribution criterion. The second distribution standard takes into account not only the amount of electricity produced by the renewable energy power plant and the amount of electricity stored in the energy storage device, but also the reference capacity of the line, so that the energy management system 700 can provide a schedule that allows for a stable supply of electricity through the integrated line 510.

[0153] The step 900 of receiving the power quantity information may be performed based on a Supervisory Control And Data Acquisition (SCADA) system.

[0154] The energy management system 700 according to an embodiment can manage the power system to supply a corresponding amount of power even if the amount of power that must be supplied through the aggregated line 510 connected to multiple substations according to the operation described in this figure is less than the reference capacity of the aggregated line 510. In particular, the energy management system 700 can appropriately determine the amount of charge / discharge power of the ESS located in different regions through communication between the power plants, substations, and / or corresponding energy storage devices of the power system.

[0155] The energy storage system 200, energy management system 700, and power system described in this disclosure may be implemented with hardware components, software components, and / or a combination of hardware and software components. The present disclosure may also be provided in the form of a computer program stored on a computer-readable storage medium to perform the method of operation of the energy storage system 200 and the power system. The present disclosure may also be created as a computer-executable program and may be embodied in a general-purpose digital computer that runs such a program using a computer-readable storage medium.

[0156] Such a computer-readable storage medium may be Read-Only Memory (ROM), Random Access Memory (RAM), Flash Memory, CD-ROMs, CD-Rs, CD+Rs, CD-RWs, CD+RWs, DVD-ROMs, DVD-Rs, DVD+Rs, DVD-RWs, DVD+RWs, DVD-RAMs, BD-ROMs, BD-Rs, BD-RLTHs, BD-REs, magnetic tape, floppy disks, magneto-optical data storage devices, optical data storage devices, hard disks, solid-state disks (SSDs), or any device capable of storing instructions or software, associated data, data files, and data structures and providing instructions or software, associated data, data files, and data structures to a processor or computer so that the processor or computer can execute the instructions.

[0157] Although the embodiments have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements made by those skilled in the art using the basic concept of the present invention defined in the following claims also fall within the scope of the present invention.

Claims

1. a receiver for receiving power amount information including first power amount information on an amount of power produced at a first renewable energy power plant located in a first region and an amount of power stored in a first energy storage device located in the first region for the first renewable energy power plant, and second power amount information on an amount of power produced at a second renewable energy power plant located in a second region and an amount of power stored in a second energy storage device located in the second region for the second renewable energy power plant; and a controller that determines an operation mode for each of the first energy storage device and the second energy storage device based on the received power amount information, and a distribution criterion that sets a charging amount or a discharging amount according to the operation mode, The power produced in the first renewable energy power plant is supplied to a first substation via a first line, the power produced in the second renewable energy power plant is supplied to a second substation via a second line, and the power produced in the first substation and the second substation is supplied to a user via an integrated line; a reference capacity of the integrated line is equal to a sum of a reference capacity of the first line and a reference capacity of the second line, and an amount of power supplied to a user via the integrated line is smaller than the reference capacity of the integrated line; If it is predicted that a first amount of power supplied through the first line will exceed a reference capacity of the first line or a second amount of power supplied through the second line will exceed a reference capacity of the second line by operating in the operation mode according to the distribution standard, The controller includes: An energy management system that modifies the distribution criteria based on the power amount information and line reference capacity information so that the amount of power supplied through the line does not exceed the line reference capacity, and a user-supplied amount of power corresponding to the sum of the first amount of power and the second amount of power is supplied through the integrated line.

2. The operating mode is 2. The energy management system of claim 1, comprising at least one of a first charge mode indicative of charging of the first energy storage device, a first discharge mode indicative of discharging of the first energy storage device, a second charge mode indicative of charging of the second energy storage device, or a second discharge mode indicative of discharging of the second energy storage device.

3. When the operation mode includes the first charging mode and the second charging mode, 3. The energy management system according to claim 2, wherein the charging amount in the first charging mode and the charging amount in the second charging mode are determined based on the amount of power stored in the first energy storage device and the amount of stored power stored in the second energy storage device.

4. A ratio of a charging amount in the second charging mode to a charging amount in the first charging mode is The energy management system according to claim 3 , wherein the ratio of the amount of power stored in the first energy storage device to the amount of power stored in the second energy storage device is the same as the ratio of the amount of power stored in the first energy storage device to the amount of power stored in the second energy storage device.

5. When the operation mode includes the first discharge mode and the second discharge mode, 3. The energy management system according to claim 2, wherein the amount of discharge in the first discharge mode and the amount of discharge in the second discharge mode are determined based on an amount of power stored in the first energy storage device and an amount of power stored in the second energy storage device.

6. 6. The energy management system of claim 5, wherein a ratio of an amount of discharge in the second discharge mode to an amount of discharge in the first discharge mode is the same as a ratio of an amount of power stored in the second energy storage device to an amount of power stored in the first energy storage device.

7. When the operation mode includes the first charging mode and the second discharging mode, or the first discharging mode and the second charging mode, A ratio of an amount of power supplied to the second substation via the second line to an amount of power supplied to the first substation via the first line is The energy management system according to claim 2 , wherein the ratio of the amount of electric power stored in the second energy storage device to the amount of electric power stored in the first energy storage device is the same as the ratio of the amount of electric power stored in the second energy storage device to the amount of electric power stored in the first energy storage device.

8. The receiver includes: The energy management system of claim 1 , wherein the power amount information is received based on a Supervisory Control And Data Acquisition (SCADA) system.

9. Receiving power quantity information including: first power quantity information on an amount of power produced at a first renewable energy power plant located in a first region and an amount of power stored in a first energy storage device located in the first region for the first renewable energy power plant; and second power quantity information on an amount of power produced at a second renewable energy power plant located in a second location and an amount of power stored in a second energy storage device located in the second location for the second renewable energy power plant; determining a distribution criterion for setting an operation mode and a charge or discharge amount according to the operation mode for each of the first energy storage device and the second energy storage device based on the received power amount information; The power produced in the first renewable energy power plant is supplied to a first substation via a first line, the power produced in the second renewable energy power plant is supplied to a second substation via a second line, and the power produced in the first substation and the second substation is supplied to a user via an integrated line; a reference capacity of the integrated line is equal to a sum of a reference capacity of the first line and a reference capacity of the second line, and an amount of power supplied to the user via the integrated line is smaller than the reference capacity of the integrated line; If it is predicted that a first amount of power supplied through the first line will exceed a reference capacity of the first line or a second amount of power supplied through the second line will exceed a reference capacity of the second line by operating in the operation mode according to the distribution standard, The step of determining the distribution criterion comprises: An operating method of an energy management system that modifies the distribution criteria based on the power amount information and line reference capacity information so as to supply an amount of user-supplied power corresponding to the sum of the first amount of power and the second amount of power through the integrated line without the amount of power supplied through the line exceeding the line reference capacity.

10. The operating mode is 10. The method of claim 9, comprising at least one of a first charge mode indicative of charging of the first energy storage device, a first discharge mode indicative of discharging of the first energy storage device, a second charge mode indicative of charging of the second energy storage device, or a second discharge mode indicative of discharging of the second energy storage device.

11. When the operation mode includes the first charging mode and the second discharging mode, or the first discharging mode and the second charging mode, A ratio of an amount of power supplied to the second substation via the second line to an amount of power supplied to the first substation via the first line is The method of claim 10, wherein the ratio of the amount of power stored in the second energy storage device to the amount of power stored in the first energy storage device is the same as the ratio of the amount of power stored in the second energy storage device to the amount of power stored in the first energy storage device.

12. a first renewable energy power plant located in a first region; a second renewable energy power plant located in a second region; a first energy storage device located in the first region for the first renewable energy power plant; a second energy storage device for the second renewable energy power plant located in the second region; A first line that supplies electricity generated in the first renewable energy power plant to a first substation; A second line that supplies electricity generated at the second renewable energy power plant to a second substation; an integrated line that supplies the power produced in the first substation and the second substation to a user (the reference capacity of the integrated line is equal to the sum of the reference capacity of the first line and the reference capacity of the second line, and the amount of power supplied to the user via the integrated line is smaller than the reference capacity of the integrated line); and an energy management system that receives power amount information including first power amount information on the amount of power produced at the first renewable energy power plant and the amount of power stored in the first energy storage device, and second power amount information on the amount of power produced at the second renewable energy power plant and the amount of power stored in the second energy storage device, and determines a distribution standard that sets an operation mode for each of the first energy storage device and the second energy storage device and a charging amount or discharging amount according to the operation mode based on the received power amount information; If it is predicted that a first amount of power supplied through the first line will exceed a reference capacity of the first line or a second amount of power supplied through the second line will exceed a reference capacity of the second line by operating in the operation mode according to the distribution standard, The energy management system includes: and a power system that modifies the distribution criteria based on the power amount information and line reference capacity information so that an amount of user-supplied power corresponding to the sum of the first amount of power and the second amount of power is supplied through the integrated line without the amount of power supplied through the line exceeding the line reference capacity.

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