Power system

Abstract

The present invention relates to a power system comprising: a power unit for supplying power to a load in a building; an electric vehicle charging unit that receives power from the power unit and charges an electric vehicle to be charged; and a control unit that controls the operation of the power unit and the electric vehicle charging unit by monitoring the consumption of the load and the charging of the electric vehicle. The power unit includes: a first supply unit that receives commercial power from a system to which the building is connected; and one or more second supply units that are provided in the building and that supply power by itself. The control unit determines a predicted power consumption value of the load and a predicted power charge value of the electric vehicle on the basis of a power consumption history of the load and a charge history of the electric vehicle, and controls the operation of the one or more second supply units on the basis of the predicted power consumption value and the predicted power charge value. Therefore, power supply to the load and charging of the electric vehicle are controlled.

Description

Technical Field

[0001] The invention relates to an electric power system of a building provided with electric vehicle charging equipment. Background Art

[0002] Background of the invention relates to a power system for charging electric vehicles, and more particularly, to a system for charging electric vehicles for a building including various energy sources.

[0003] The coupling of various energy sources is being tried all over the world, among which electric vehicles account for an increasing proportion. Under this situation, various types of electric vehicle chargers are being integrated with power equipment in existing power equipment.

[0004] The charging load of electric vehicles increases very quickly, but since they are not connected to the upper power equipment, they only act as loads. However, when the peak load of electric vehicles conflicts with the peak load of general loads, power outages and fire accidents may occur due to overload, or electricity bills may increase due to a sharp increase in peak charges.

[0005] To this end, a method is proposed that includes solar power generation, a hydrogen fuel generator, and an energy storage system (ESS: Energy Storage System) and couples various energy sources.

[0006] Figure 1 The structure of a conventional power system is shown, which supports charging of electric vehicles and charging of hydrogen vehicles by exchanging electric power between ESS and fuel cells for charging and hydrogen charging.

[0007] The method of receiving electricity and producing and storing hydrogen in the ESS of this existing system has uneconomical limitations. In addition, since the charging station needs to be installed in a large residential area such as an apartment building or a parking building, it needs to be connected to the building energy system, but a technology that can effectively connect to the building energy system has not yet been proposed. In addition, since various energy sources are included, there are limitations such as complex system configuration and reduced stability of system operation. In addition, due to the increase in various energy sources and multiple loads, various fluctuations will occur, and appropriate technology to cope with such fluctuations has not yet been proposed, resulting in difficulties in system operation. Summary of the invention

[0008] Problems to be solved by the invention

[0009] The problem to be solved by the present invention is to solve the above-mentioned problems.

[0010] That is, the problem to be solved by the present invention is to enable stable charging of electric vehicles in a specific area such as a building including various energy sources.

[0011] Thus, through this specification, an embodiment of a power system is provided that can realize stable power supply to a load and charging of electric vehicles in a specific area including various energy sources.

[0012] In addition, an embodiment of a power system is provided that can appropriately cope with various load fluctuations occurring in a specific area.

[0013] Furthermore, an embodiment of a power system capable of suppressing fluctuations caused by coupling of a plurality of energy sources is provided.

[0014] Technical solutions to the problem

[0015] The power system of the present specification, which is used to solve the problems mentioned above, includes: a power unit, which supplies power to a load in a specific area; an electric vehicle charging unit, which receives power from the power unit and charges the electric vehicle as a charging target; and a control unit, which controls the operation of the power unit and the electric vehicle charging unit by monitoring the consumption of the load and the charging of the electric vehicle; the power unit includes: a first supply unit, which receives commercial power from a system connected to the specific area; and one or more second supply units, which are arranged in the specific area and supply power by themselves; the control unit determines the predicted power consumption value of the load and the predicted power charging value of the electric vehicle based on the power consumption history of the load and the charging history of the electric vehicle, and controls the operation of one or more second supply units based on the predicted power consumption value and the predicted power charging value, thereby controlling the power supply to the load and the charging of the electric vehicle.

[0016] In one embodiment, the one or more second supply units may include at least one of a fuel cell unit, a battery unit, and a renewable energy unit.

[0017] In one embodiment, when the total value of the predicted power consumption value and the predicted power charging value exceeds a specified reference value, the control unit can allocate the power supply value to the load and the charging value of the electric vehicle according to a specified ratio, and can control the power supply and the charging according to the allocated ratio.

[0018] In one embodiment, when the power supply value and the charging value are allocated according to a specified ratio, the control unit can allocate the power supply value and the charging value separately based on the degree to which the total value exceeds the specified reference value and at least one of the ratio of the predicted power consumption value and the predicted power charging value.

[0019] In one embodiment, when the power supply value and the charging value are allocated according to a prescribed ratio, the control unit can judge the current status level according to the real-time power consumption value of the load and the real-time power charging value of the electric vehicle, and can allocate the power supply value and the charging value according to a reference ratio corresponding to the current status level.

[0020] In one embodiment, the second supply unit may be formed in plural and include at least one of two or more components of the fuel cell unit, the battery unit, and the renewable energy unit.

[0021] In one embodiment, the control unit may control the operation of at least one supply unit among the plurality of second supply units.

[0022] In one embodiment, the control unit may control the supply and reception of electric power between a plurality of the second supply units.

[0023] In one embodiment, when the control unit controls the operation of more than one second supply unit, the control unit can calculate the virtual inertia of the operation of the operating object supply unit based on the information about the status of the system, the electric vehicle charging unit and the power unit, and can operate the operating object supply unit to perform the power supply and the charging by reflecting the virtual inertia.

[0024] In one embodiment, the control unit may calculate the virtual inertia based on information about at least one of voltage, current, power, frequency, power factor, and load of each of the system and the power unit.

[0025] In one embodiment, the control unit may calculate the virtual inertia as a value at which the power supplied from the running object supply unit becomes synchronized with the power supplied from the first supply unit.

[0026] In one embodiment, the control unit may determine the operating object supply unit according to the real-time power consumption value of the load and the real-time power charging value of the electric vehicle, thereby operating the operating object supply unit to perform the power supply and the charging.

[0027] In one embodiment, the control unit may control the power supply and the charging operations by monitoring the change of the virtual inertia and responding to the change of the virtual inertia.

[0028] In one embodiment, when the virtual inertia corresponds to a prescribed reference range, the control unit may control the notification information to be displayed to the outside by generating notification information on the reference range corresponding to the virtual inertia.

[0029] In one embodiment, the one or more second supply units may include at least a fuel cell unit, and may further include a hydrogen vehicle charging unit that receives hydrogen from the fuel cell unit and charges a hydrogen vehicle to be charged.

[0030] In one embodiment, the control unit can determine the predicted power consumption value, the predicted power charging value and the predicted hydrogen charging value of the hydrogen vehicle based on the power consumption history, the charging history and the hydrogen charging history of the hydrogen vehicle, and can control the operation of one or more second supply units based on the predicted power consumption value, the predicted power charging value and the predicted hydrogen charging value, thereby controlling the power supply to the load, the charging of the electric vehicle and the hydrogen charging of the hydrogen vehicle.

[0031] Effects of the Invention

[0032] According to the embodiments of the present specification, the operation of the power supply can be controlled according to the predicted consumption value of the load and the predicted power charging value of the electric vehicle, thereby achieving appropriate power supply and charging according to the load status in the building.

[0033] In addition, various power supply sources can be operated by reflecting virtual inertia, thereby achieving an effect of stabilizing the operation / operation of the power supply sources.

[0034] As a result, electric vehicles can be stably charged, and various power sources can be used, and stable and efficient power supply and charging can be achieved through various power sources, thereby achieving the effect of efficient energy consumption in the building. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a diagram showing a configuration of an example of a conventional power system for realizing charging of electric vehicles and hydrogen vehicles.

[0036] Figure 2 It is a configuration diagram of the power system of the embodiment.

[0037] Figure 3 It is a structural diagram of a plurality of second supply units in a specific embodiment.

[0038] Figure 4 It is a diagram showing the structure of a control unit according to a specific embodiment.

[0039] Figure 5 is a control flow chart of a power system according to a specific embodiment.

[0040] Figure 6 is an example diagram of an application embodiment. DETAILED DESCRIPTION

[0041] Hereinafter, the embodiments disclosed in the present specification will be described in detail with reference to the drawings. The same or similar components will be denoted by the same reference numerals regardless of the reference numerals, and repeated description thereof will be omitted.

[0042] In addition, when describing the technology disclosed in this specification, if it is determined that the specific description of the related known technology may make the gist of the technology disclosed in this specification unclear, or if the technical personnel in this field can easily understand or infer the content without specific description, the detailed description will be omitted. In addition, it should be noted that the drawings are only used to make the technical ideas disclosed in this specification easy to understand and should not be interpreted as limiting the technical ideas by the drawings.

[0043] Below, refer to Figures 2 to 6 A power system according to an embodiment of the present specification will be described.

[0044] like Figure 2 As shown, the power system 1000 includes a power unit 100 , an electric vehicle charging unit 200 and a control unit 300 .

[0045] The power system 1000 including the power unit 100 , the electric vehicle charging unit 200 , and the control unit 300 is a power system that receives power from a plurality of power supply sources and consumes the power.

[0046] The power system may be a power system applied to more than one building or a building area including a specific area outdoors.

[0047] For example, it may be a power system of a building including one or more of an indoor parking area and an outdoor parking area.

[0048] Here, the building may be a building where a charging facility for an electric vehicle EV is installed, and the charging facility may correspond to the electric vehicle charging unit 200 .

[0049] The power unit 100 may supply power to the load L within the specific area.

[0050] The load L may be a device that is installed in the specific area and consumes power.

[0051] The load L may be plural, including all devices installed in the specific area that consume electricity, such as lighting equipment, electrical equipment, communication equipment, and air-conditioning equipment.

[0052] The power unit 100 includes a first supply unit 110 that receives commercial power from a system G connected to the specific area, and a second supply unit 120 that is installed in the specific area and supplies power by itself.

[0053] Here, the system G may refer to a power grid supplied with generated power by a power supplier.

[0054] The system G may be a wireless system including one or more power generation, transmission, transformation, distribution, power reception and load.

[0055] The system G may supply commercial power to the connected power supply targets by connecting the specific area and one or more power supply targets other than the specific area.

[0056] In such a system G, various electric powers can be supplied by connecting a plurality of electric power equipment, electric power systems, and loads such as the specific area, thereby causing fluctuations in the commercial power supplied to the power supply target.

[0057] The commercial power may be power having one or more values ​​of voltage, current, power factor, and frequency corresponding to a specific power supply reference.

[0058] For example, it may be electricity with a frequency of 60±x[HZ].

[0059] The first supply unit 110 may receive the commercial power from the system G and supply the power to the load L.

[0060] That is, the first supply unit 110 may be a device that receives the commercial power and supplies the power to the load L.

[0061] The first supply unit 110 may convert the commercial power into a type that can be supplied to the load L and supply the converted power to the load L.

[0062] The first supply unit 110 may include one or more power conversion devices and power supply devices and supplies power to the load L.

[0063] In addition, the first supply unit 110 may supply power to the electric vehicle charging unit 200 .

[0064] Thus, the electric vehicle charging unit 200 can charge the electric vehicle EV as a charging target.

[0065] The second supply unit 120 may be disposed in the specific area and supply the load L with the self-generated power.

[0066] That is, the second supply unit 120 may be a self-powered source provided in the specific area.

[0067] The number of the second supply part 120 may be more than one.

[0068] The second supply part 120 may preferably be formed in plural.

[0069] like Figure 3 As shown, the second supply unit 120 may include at least two components of a fuel cell unit 120#1, a battery unit 120#2, and a renewable energy unit 120#3, and the number of the two or more components may be more than one.

[0070] The fuel cell unit 120#1 may be a hydrogen fuel cell that supplies electricity generated by a reverse reaction of electrolysis.

[0071] The battery unit 120#2 may be a battery that stores power and supplies the stored power.

[0072] The renewable energy unit 120#3 may be a solar or solar thermal power generation device that supplies electric power generated by solar energy.

[0073] In the case where the second supply unit 120 is formed in plural, the plurality of second supply units 120 may respectively convert the own power into a type that can be supplied to the load L and supply the converted power to the load L.

[0074] The one or more second supply units 120 may include one or more power conversion devices and power supply devices, and may supply power to the load L.

[0075] In addition, at least one of the second supply units 120 may supply power to the electric vehicle charging unit 200 .

[0076] Thus, the electric vehicle charging unit 200 can charge the electric vehicle EV as a charging target.

[0077] The power unit 100 including the first supply unit 110 and the one or more second supply units 120 may be controlled by the control unit 300 and supply power to the load L and the electric vehicle charging unit 200 .

[0078] In addition, the power unit 100 may also supply driving power to the control unit 300 , and may transmit information on the state and operation of the power unit 100 or information on power supply of the power unit 100 to the control unit 300 .

[0079] The electric vehicle charging unit 200 receives electric power from the electric power unit 100 and charges the electric vehicle EV to be charged.

[0080] The electric vehicle charging unit 200 may receive power from the first supply unit 110 and at least one of the second supply units 120 and use the received power to charge the electric vehicle EV.

[0081] The electric vehicle charging unit 200 may be controlled by the control unit 300 and power may be supplied to the electric vehicle charging unit 200 .

[0082] The control portion 300 controls the operations of the power portion 100 and the electric vehicle charging portion 200 by monitoring the consumption of the load L and the charging of the electric vehicle EV.

[0083] In addition, the control unit 300 may also control the operation of the power unit 100 and the electric vehicle charging unit 200 by monitoring the state of the system G and the state of the power unit 100 .

[0084] The control unit 300 may refer to a central control device of the specific area.

[0085] For example, it may be a control device or an integrated control device of the building.

[0086] In addition, the control unit 300 may also refer to a control system including one or more control devices that perform power control.

[0087] like Figure 4 As shown, the control unit 300 may include one or more control units of a power control unit 310 and a charging control unit 320 .

[0088] The power control unit 310 may refer to a control device that monitors and controls the power unit 100 .

[0089] The power control unit 310 may control the power supply of the power unit 100 by applying a control signal to the power unit 100 .

[0090] The power control unit 310 may control the first supply unit 110 and the at least one second supply unit 120 by applying control signals to the first supply unit 110 and the at least one second supply unit 120 .

[0091] The charging control unit 320 may refer to a control device that monitors and controls the electric vehicle charging unit 200 .

[0092] The charging control unit 320 may control the charging of the electric vehicle charging unit 200 by applying a control signal to the electric vehicle charging unit 200 .

[0093] In addition, the control unit 300 may further include one or more components for controlling the control unit 300 in addition to the power control unit 310 and the charging control unit 320 .

[0094] For example, it may further include: a communication unit for communicating with one or more communication objects; and a central operation unit for transmitting control instructions to the power control unit 310 and the charging control unit 320 respectively.

[0095] The control unit 300 may control the power supply to the load L and the electric vehicle charging unit 200 by controlling the operation of each of the first supply unit 110 and the one or more second supply units 120 .

[0096] For example, the amount of electricity supplied to the load L from any one of the first supply unit 110 and one or more of the second supply units 120 may be controlled.

[0097] The control part 300 may receive information about states and actions from the first supply part 110 and the one or more second supply parts 120 , respectively, and control the operation of each of the first supply part 110 and the one or more second supply parts 120 according to the received information.

[0098] For example, information about the capacity that can be supplied can be received from the first supply unit 110 and one or more second supply units 120 respectively, and the operation of the first supply unit 110 and one or more second supply units 120 can be controlled according to the received information, so that the first supply unit 110 and one or more second supply units 120 supply power to the load L and the electric vehicle charging unit 200.

[0099] On the other hand, when the second supply unit 120 is formed in plural, the control unit 300 may control the supply and reception of power between the plurality of second supply units 1200 .

[0100] For example, the fuel cell unit 120#1 may be controlled to supply power to the battery unit 120#2 to store the power in the battery unit 120#2, or the renewable energy unit 120#3 may be controlled to supply power to the battery unit 120#2 to store the power in the battery unit 120#2.

[0101] The control unit 300 may control charging of the electric vehicle EV by controlling the operation of the electric vehicle charging unit 200 .

[0102] For example, the charging ON / OFF, charging time point, charging capacity, charging time, and charging cycle of the electric vehicle charging unit 200 can be controlled.

[0103] The control portion 300 may receive information on a state and an action from the electric vehicle charging portion 200 , and control the operation of the electric vehicle charging portion 200 according to the received information.

[0104] For example, information on the number and charging capacity of the electric vehicles EV to be charged may be received, and the operation of the electric vehicle charging unit 200 may be controlled according to the received information, so as to charge the electric vehicles EV to be charged.

[0105] In addition, the control unit 300 may also receive operation information from the load L, and control the operation of the load L or control the operation of one or more components of the power unit 100 and the electric vehicle charging unit 200 according to the received information.

[0106] In addition, the control unit 300 can also communicate with an external server ES outside the building, and control the operation of the load L or control the operation of one or more components in the power unit 100 and the electric vehicle charging unit 200 according to the information received from the external server ES.

[0107] Here, the external server ES may be one or more of a server of another system connected to the system G, a control server that communicates with the load L and controls the load L, and a control server that controls the building.

[0108] On the other hand, Figure 2 As shown, the power system 1000 may further include a hydrogen vehicle charging unit 400 that receives hydrogen from the fuel cell unit 120#1 and charges a hydrogen vehicle HV that is a charging target.

[0109] The hydrogen vehicle charging unit 400 may receive hydrogen from the fuel cell unit 120 # 1 under the control of the control unit 300 , and charge the hydrogen vehicle HV as the charging target.

[0110] In addition, the hydrogen vehicle charging unit 400 may also receive hydrogen from a gas supply source through the gas piping in the specific area, and charge the hydrogen vehicle HV to be charged with hydrogen.

[0111] As described above, when the gas supply source is provided in the specific area, the control unit 300 may also control the gas supply source to supply hydrogen to the fuel cell unit 120#1, thereby charging the fuel cell unit 120#1 with hydrogen.

[0112] In the power system 1000 as described above, the control unit 300 determines the predicted power consumption value of the load L and the predicted power charging value of the electric vehicle EV based on the power consumption history of the load L and the charging history of the electric vehicle EV, and controls the operation of one or more second supply units 120 based on the predicted power consumption value and the predicted power charging value, thereby controlling the power supply to the load L and the charging of the electric vehicle EV.

[0113] For example, when the charging of the electric vehicle EV increases, based on the predicted power consumption value and the predicted power charging value, the power supply of the power unit 100 can be adjusted by adding the operation of at least one of the more than one second supply units 120 or by increasing the power supply of at least one of the more than one second supply units 120, thereby controlling the power supply and the charging to proceed smoothly.

[0114] Here, the predicted power consumption value may refer to an expected consumption value of a power consumption pattern of the load L, and the predicted power charging value may refer to an expected charging value of a charging pattern of the electric vehicle EV.

[0115] The control unit 300 may determine a power consumption pattern of the load L based on the power consumption history, and determine the predicted power consumption value based on the power consumption pattern.

[0116] The control unit 300 may determine a charging mode of the electric vehicle EV according to the charging history, and determine the predicted electric power charging value according to the charging mode.

[0117] The control unit 300 may determine the predicted power consumption value and the predicted power charging value based on the power consumption history and the charging history included in the pre-stored operation history.

[0118] In addition, the control unit 300 may also determine the predicted power consumption value and the predicted power charging value by receiving the power consumption history from the load L or the external server ES and receiving the charging history from the electric vehicle EV or the electric vehicle charging unit 200 .

[0119] If, in the case where the power system 1000 also includes the hydrogen car charging unit 400, the control unit 300 can determine the predicted power consumption value, the predicted power charging value and the predicted hydrogen charging value of the hydrogen car HV based on the power consumption history, the charging history and the hydrogen charging history of the hydrogen car HV, and control at least one of the more than one second supply units 120 based on the predicted power consumption value, the predicted power charging value and the predicted hydrogen charging value, thereby controlling the power supply to the load L, the charging of the electric vehicle EV and the hydrogen charging of the hydrogen car HV.

[0120] When the total value of the predicted power consumption value and the predicted power charging value exceeds a specified reference value, the control unit 300 can allocate the power supply value to the load L and the charging value to the electric vehicle EV according to a specified ratio, thereby controlling the power supply and the charging according to the allocated ratio.

[0121] Here, the predetermined reference value may be a reference capacity value preset in the control unit 300 .

[0122] The prescribed reference value may be set to a rated accommodation capacity value of the building.

[0123] Thus, when the total value exceeds the specified reference value, the control unit 300 can determine that the demand of the load L and the electric vehicle EV exceeds the rated capacity value, thereby controlling the power supply and the charging by allocating the power supply value and the charging value according to a specified ratio.

[0124] For example, when the prescribed ratio is 3:1, the control unit 300 can supply 75% of the total power supplied from the power unit 100 to the load L and charge the electric vehicle EV with the remaining 25% by allocating 75% of the total power supplied from the power unit 100 as the power supply value and the remaining 25% as the charging value.

[0125] When allocating the power supply value and the charging value at a prescribed ratio, the control unit 300 may allocate the power supply value and the charging value according to at least one of the extent to which the total value exceeds the prescribed reference value and the ratio of the predicted power consumption value to the predicted power charging value.

[0126] For example, when the total value exceeds 10 compared with the specified benchmark value, it can be allocated at a ratio of 2:1, and when it exceeds 20, it can be allocated at a ratio of 3:1, or it can be allocated according to the ratio of the predicted power consumption value to the predicted power charging value.

[0127] When the power supply value and the charging value are allocated according to the specified ratio, the current status level can be judged according to the real-time power consumption value of the load L and the real-time power charging value of the electric vehicle EV, so as to allocate the power supply value and the charging value according to the reference ratio corresponding to the current status level.

[0128] For example, the current situation can be divided into available / normal / dangerous / emergency levels and judged according to the total value of the real-time power consumption value and the real-time power charging value, so that the power supply value and the charging value are allocated according to the reference ratio corresponding to the judged level.

[0129] In addition, the control unit 300 may control the operation of the one or more second supply units 120 according to a criterion corresponding to the status level.

[0130] For example, when the emergency level is set so that more than one second supply unit 120 is controlled to fully operate, when the total value of the real-time power consumption value and the real-time power charging value corresponds to the emergency level, more than one second supply unit 120 is controlled to fully supply power.

[0131] When the control unit 300 controls the operation of more than one second supply unit 120, the information about the status of the system G, the electric vehicle charging unit 200 and the power unit 100 can be used to calculate the virtual inertia of the operation of the operating object supply unit based on the result, and the power supply and charging of the operating object supply unit can be operated by reflecting the virtual inertia.

[0132] The virtual inertia may refer to a parameter or a control command value for suppressing existing power supply fluctuation caused by coupling between power supply sources.

[0133] In this viewpoint, the virtual inertia may also refer to a compensation parameter for compensating for power supply fluctuations when power supply sources are coupled.

[0134] That is, when the control unit 300 controls the operation of at least one of the one or more second supply units 120, the operation of the one or more second supply units 120 can be controlled by reflecting the virtual inertia to suppress power supply fluctuations supplied from the first supply unit 110 caused by the operation of at least one of the one or more second supply units 120 that is a supply unit different from the first supply unit 110.

[0135] Thus, by reflecting the virtual inertia, it is possible to suppress power supply fluctuation caused by the operation of at least one of the one or more second supply units 120 .

[0136] For example, when one or more of the renewable energy units 120#3 in the second supply unit 120 are additionally operated, the additional operation of the renewable energy unit 120#3 can be controlled according to the virtual inertia to suppress power supply fluctuations caused by the additional operation of the renewable energy unit 120#3.

[0137] The control unit 300 may calculate the virtual inertia based on information on at least one of voltage, current, power, frequency, power factor, and load of each of the system G and the power unit 100 .

[0138] The control unit 300 may calculate the virtual inertia as a value at which the power supplied from the running object supply unit becomes synchronized with the power supplied from the first supply unit 110 .

[0139] For example, the virtual inertia may be calculated so that the frequency of the power supplied from the running object supply unit is synchronized with the frequency of the commercial power supplied from the first supply unit 110 .

[0140] Thus, the control unit 300 that calculates the virtual inertia and reflects it in the operation of one or more supply units 120 among the plurality of second supply units 120 can determine the operating object supply unit based on the real-time power consumption value of the load L and the real-time power charging value of the electric vehicle EV, thereby operating the operating object supply unit to perform the power supply and the charging.

[0141] For example, at least one of the one or more second supply units 120 may be determined as the operating target supply unit according to the real-time power consumption value and the real-time power charging value, so that the operating target supply unit is operated to perform the power supply and the charging.

[0142] For example, when the real-time power consumption value and the real-time power charging value are below a specific benchmark, the supply unit with the smallest operating burden among one or more of the second supply units 120 can be determined as the operating object supply unit, or when the real-time power consumption value and the real-time power charging value exceed the specific benchmark, the supply unit with the largest output power can be determined as the operating object supply unit.

[0143] When the operating object supply unit is determined, the control unit 300 may calculate the virtual inertia according to the operating object supply unit and reflect the virtual inertia on the operation of the operating object supply unit, thereby controlling the power supply and the charging.

[0144] On the other hand, the control portion 300 may monitor the change of the virtual inertia and control the operation of the power supply and the charging in response to the change of the virtual inertia.

[0145] For example, if the virtual inertia increases, the power supply value and the charging value of the operating object supply unit may be reduced, and if the virtual inertia decreases, the power supply value and the charging value of the operating object supply unit may be increased.

[0146] When the virtual inertia corresponds to a prescribed reference range, the control unit 300 may adjust the reflection of the virtual inertia.

[0147] Here, the reference range may be a range including a limit value of the virtual inertia or a range including an allowable value.

[0148] When the virtual inertia corresponds to the reference range, the control unit 300 may reduce the reflection value of the virtual inertia and reflect it on the operation of the operation object supply unit.

[0149] That is, when the virtual inertia corresponds to the reference range, the control unit 300 determines that the virtual inertia reaches a limit value or an allowable value, and may reflect the virtual inertia by reducing a reflection value of the virtual inertia reflected in the operation of the operation object supply unit.

[0150] In addition, when the virtual inertia corresponds to the reference range, the control portion 300 may generate notification information regarding the virtual inertia corresponding to the reference range.

[0151] That is, when the virtual inertia corresponds to the reference range, the control portion 300 determines that the virtual inertia reaches a limit value or an allowable value, and may generate the notification information.

[0152] The control unit 300 may control the notification information to be displayed externally.

[0153] For example, the notification information may be controlled to be displayed on a screen through a display mechanism, or to be output in the form of voice through a voice output mechanism.

[0154] In the power system 1000 described above, the specific process of the control performed by the control unit 300 can be as follows: Figure 5 Proceed in the order shown.

[0155] like Figure 5 As shown, the control unit 300 can determine the predicted power consumption value and the predicted power charging value based on the power consumption history and the charging history (S1), and can compare the total value of the predicted power consumption value and the predicted power charging value with the specified reference value (S2).

[0156] According to the comparison result (S2) between the total value and the prescribed reference value, when the total value exceeds the prescribed reference value, the control unit 300 can determine the distribution ratio of the power supply value and the charging value (S3); when the total value does not exceed the prescribed reference value, the existing control can be maintained.

[0157] After determining the distribution ratio of the power supply value and the charging value ( S3 ), the control unit 300 may determine the first power supply value to be supplied from the first supply unit 110 and the second power supply values ​​to be supplied from the second supply units 120 ( S4 ).

[0158] After determining the first power supply value and the second power supply value ( S4 ), the control unit 300 may determine an operating target supply unit from among the plurality of second supply units 120 according to the second power supply value, and calculate the virtual inertia according to the operating target supply unit ( S5 ).

[0159] After determining the operation object supply part and calculating the virtual inertia ( S5 ), the control part 300 may operate the operation object supply part by reflecting the virtual inertia ( S6 ).

[0160] According to this process, since the operation of the operating object supply unit is carried out in a state where the virtual inertia has been reflected, the first supply unit 110 can supply the first power supply value, and at least one of the plurality of second supply units 120 including the operating object supply unit can supply the second power supply value, thereby realizing the power supply and the charging.

[0161] In the embodiment of the power system 1000 described above, it can be applied to Figure 6 The system shown may be implemented as Figure 6 The system shown.

[0162] like Figure 6 As shown, the power system 1000 can be applied to a building, or can be implemented as a power system of the building as described above, the building coexists with general loads and includes electric vehicle / hydrogen vehicle charging equipment, receives power from the system, and includes a plurality of different power supply sources and receives power from the power supply sources. The power system 1000 can be applied to a building coexists with general loads and includes electric vehicle / hydrogen vehicle charging equipment, or can be implemented as a power system of the building as described above.

[0163] The integrated control unit monitors the system bus and monitors the power equipment of the charging building including the general load. The pattern of the general load of the charging building is analyzed and predicted, and the existing charging pattern is predicted. When the predicted total is below the set allowable capacity of the power equipment, all power equipment operates normally. When the predicted total exceeds the pre-set interval of the allowable capacity of the power equipment, the power equipment operates in the power distribution mode. In the power distribution mode, it is divided into emergency status / warning status / normal status / available status according to the real-time power total value and capacity value. In the warning status, when there is a baseline approximation of the emergency status, the power is turned on / off (On / Off) in real time by stopping and starting (Stop&Go) the slow charger to charge. When in normal conditions, both loads and electric vehicle charging are used without problems.

[0164] On the other hand, in an emergency situation, all electric vehicle charging can be stopped, or other energy sources can be used to cope with it.

[0165] If hydrogen fuel cells are needed to operate or meet hydrogen recharging requirements, hydrogen can be produced and stored by reforming LNG (Liquefied Natural Gas) gas to utilize fuel cells. In addition, solar charging can actively operate in conjunction with load demand and ESS, and can receive power from hydrogen fuel cells when necessary.

[0166] On the other hand, due to the rapid renewable output, sudden hydrogen reforming and fuel cell operation, large voltage changes occur in the system. In order to cope with this situation, it is possible to perform electric vehicle charging and power supply to general loads by reflecting the virtual inertia based on AC-UPS that can cope with instantaneous fluctuations to maintain frequency synchronization.

[0167] The preferred embodiments of the present invention described above are disclosed in order to solve technical problems. Ordinary technicians in the technical field of the present invention (technical personnel in this field) can make various modifications, changes, additions, etc. within the concept and scope of the present invention, and such modifications, etc. should be deemed to belong to the claims of the present invention.

[0168] Description of Reference Numerals

[0169] 100: Power unit 200: Charging unit

[0170] 300: Control unit 1000: Power system

Claims

1. A power system, characterized in that: include: The power department supplies power to loads within a specific area; an electric vehicle charging unit, receiving electric power from the power unit and charging the electric vehicle as a charging target; as well as a control unit that controls the operation of the power unit and the electric vehicle charging unit by monitoring the consumption of the load and the charging of the electric vehicle; The power unit includes: a first supply unit that receives commercial power from a system to which the specific area is connected; and One or more second supply units, which are arranged in the specific area and are self-powered; The control unit determines the predicted power consumption value of the load and the predicted power charging value of the electric vehicle based on the power consumption history of the load and the charging history of the electric vehicle, and controls the operation of one or more of the second supply units based on the predicted power consumption value and the predicted power charging value, thereby controlling the power supply to the load and the charging of the electric vehicle.

2. The power system according to claim 1, characterized in that: The one or more second supply units include at least one of a fuel cell unit, a battery unit, and a renewable energy unit.

3. The power system according to claim 2, characterized in that: When the total value of the predicted power consumption value and the predicted power charging value exceeds a predetermined reference value, The control unit allocates a power supply value to the load and a charge value to the electric vehicle at a prescribed ratio, and controls the power supply and the charge according to the allocated ratio.

4. The power system according to claim 3, characterized in that: When the power supply value and the charging value are allocated according to a prescribed ratio, The control unit allocates the power supply value and the charge value based on at least one of the extent to which the total value exceeds the prescribed reference value and the ratio of the predicted power consumption value to the predicted power charge value.

5. The power system according to claim 3, characterized in that: When the power supply value and the charging value are allocated according to a prescribed ratio, The control unit determines a current status level according to a real-time power consumption value of the load and a real-time power charging value of the electric vehicle, and allocates the power supply value and the charging value according to a reference ratio corresponding to the current status level.

6. The power system according to claim 2, characterized in that: The at least one second supply unit is formed in plural, and the second supply unit includes at least one each of two or more components of the fuel cell unit, the battery unit, and the renewable energy unit. The control unit controls the operation of at least one supply unit among the plurality of second supply units.

7. The power system according to claim 6, characterized in that: The control unit controls the supply and reception of electric power between the plurality of second supply units.

8. The power system according to claim 1, characterized in that: When the control unit controls the operation of one or more of the second supply units, The control unit calculates virtual inertia according to the operation of the operation target supply unit based on the information on the states of the system, the electric vehicle charging unit, and the electric power unit, and operates the operation target supply unit to perform the power supply and the charging by reflecting the virtual inertia.

9. The power system according to claim 8, characterized in that: The control unit calculates the virtual inertia based on information on one or more of voltage, current, power, frequency, power factor, and load of each of the system and the power unit.

10. The power system according to claim 9, characterized in that: The control unit calculates the virtual inertia so that the electric power supplied from the operation target supply unit becomes a value synchronized with the electric power supplied from the first supply unit.

11. The power system according to claim 10, characterized in that: The control unit determines the operation target supply unit according to a real-time power consumption value of the load and a real-time power charging value of the electric vehicle, thereby operating the operation target supply unit to perform the power supply and the charging.

12. The power system according to claim 8, characterized in that: The control portion monitors a change in the virtual inertia and controls the operation of the power supply and the charging in response to the change in the virtual inertia.

13. The power system according to claim 12, characterized in that: When the virtual inertia corresponds to a prescribed reference range, The control unit generates notification information about the reference range corresponding to the virtual inertia and controls the notification information to be displayed to the outside.

14. The power system according to claim 1, characterized in that: One or more of the second supply units includes at least a fuel cell unit, The invention also includes a hydrogen vehicle charging unit that receives hydrogen from the fuel cell unit and charges a hydrogen vehicle to be charged with hydrogen.

15. The power system according to claim 14, characterized in that: The control unit determines the predicted power consumption value, the predicted power charging value and the predicted hydrogen charging value of the hydrogen vehicle based on the power consumption history, the charging history and the hydrogen charging history of the hydrogen vehicle, and controls the operation of one or more of the second supply units based on the predicted power consumption value, the predicted power charging value and the predicted hydrogen charging value, thereby controlling the power supply to the load, the charging of the electric vehicle and the hydrogen charging of the hydrogen vehicle.

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