Power control system based on real time energy measurement data

Abstract

The present invention relates to a power management system based on real-time energy measurement data, comprising: an isolated DC / DC converter that converts and outputs power output from a fuel cell; a bidirectional DC / DC converter connected to an energy storage device that converts DC voltage in both directions; a bidirectional DC / DC converter that converts power output from an energy storage device and outputs it through first and second common input lines; a first capacitor connected between the first common input line and the second common input line; an MPPT converter connected to a renewable energy generation unit that generates power from at least one of solar, wind, and hydroelectric renewable energy and is controlled by maximum power point tracking; a step-up / step-down converter configured to step up power input through the first and second common input lines and output it through first and second common output lines; a bidirectional single-phase inverter that converts DC voltage output from the step-up / step-down converter into AC voltage; a weather agency server that generates and provides weather data; an isolated DC / DC converter; and a bidirectional DC / DC converter. It is equipped with a local control unit that controls the operation of an MPPT converter, a step-up / step-down converter, and a bidirectional single-phase inverter, and a power management server that transmits power adjustment information to the local control unit according to a power operation model calculated based on power generation by a renewable energy generation unit and load information output through a bidirectional single-phase inverter from power monitoring information received from the local control unit, and weather data received from a weather agency server.

Description

Technology Field

[0001] The present invention relates to a power management system based on real-time energy measurement data, and more specifically, to a power management system based on real-time energy measurement data that supports bidirectional power supply and charging with a grid power source. Background Technology

[0002] An Energy Storage System (ESS) is a system that stores energy for later use. By using an ESS, it is possible to efficiently handle fluctuations in power consumption over time and to provide stable power in the event of voltage drops caused by sudden accidents.

[0003] Therefore, ESS is an assembly of batteries for energy storage, and has a battery cell and a module including a plurality of cells as the basic constituent unit.

[0004] In addition, ESS stores excess power produced and allows it to be transmitted and used when there is a temporary shortage of power.

[0005] Recently, there has been active development of systems that combine a solar power generation device and an ESS to store electricity generated by solar power and use it for various loads, and various proposals have been made, such as domestic registered patent No. 10-1871237.

[0006] Meanwhile, recently, there has been a steady demand for a structure that expands beyond solar power generation devices to include fuel cells capable of generating electricity, enabling small-scale power consumers such as households to increase their self-supply capabilities while facilitating easy power control with the grid. The problem to be solved

[0007] The present invention was devised to solve the above-mentioned requirements, and aims to provide a power management system based on real-time energy measurement data that facilitates the control and management of power generated through new and renewable energy sources. means of solving the problem

[0008] To achieve the above objective, the real-time energy measurement data-based power management system according to the present invention comprises: a fuel cell; an isolated DC / DC converter that converts power generated from the fuel cell and output through first and second output lines into a DC voltage in an isolation manner and outputs it through first and second common output lines; an energy storage device capable of charging or discharging power through a battery; a bidirectional DC / DC converter connected between the energy storage device and first and second common input lines to convert DC voltage in both directions; a bidirectional DC / DC converter connected to the energy storage device to convert DC voltage in both directions and converts power output from the energy storage device to output it through first and second common input lines; a first capacitor connected between the first common input line and the second common input line; and a renewable energy generation unit that generates power from at least one of solar, wind, and hydroelectric renewable energy. An MPPT converter connected between the renewable energy generation unit and the first and second common input lines and controlled by maximum power point tracking for the power output from the renewable energy generation unit; a step-up / step-down converter configured to step up the power input through the first and second common input lines and output it through the first and second common output lines; a bidirectional single-phase inverter configured to convert the DC voltage output from the step-up / step-down converter through the first and second common output lines into AC voltage and supply it to the grid power supply; and a weather agency server that generates and provides weather data; A local control unit that receives a first output voltage and a first output current of the fuel cell, a second output voltage and a second output current of the energy storage device, a third output voltage and a third output current of the renewable energy generation unit, and a fourth output voltage and a fourth output current of the bidirectional single-phase inverter to generate power monitoring information, and controls the operation of the isolated DC / DC converter, the bidirectional DC / DC converter, the MPPT converter, the step-up / step-down converter, and the bidirectional single-phase inverter;The system comprises: a local communication unit controlled by the local control unit and transmitting power monitoring information; and a power management server that transmits power adjustment information to the local control unit according to a power operation model calculated based on power generation by the renewable energy generation unit and load information output through the bidirectional single-phase inverter, and weather data received from the weather agency server, based on power monitoring information received from the local control unit via a communication network; wherein the local control unit controls the operation of the isolated DC / DC converter, the bidirectional DC / DC converter, the MPPT converter, the step-up / step-down converter, and the bidirectional single-phase inverter according to the power adjustment information received from the local communication unit via the power management server via a communication network.

[0009] In addition, the power management server may be configured to transmit power adjustment information to the local control unit so that power charging from the grid power source to the energy storage device is performed during the set nighttime hours if it is determined from weather data regarding the predicted weather received from the weather agency server that the expected power production amount from the solar panel during the set reference period falls short of the reference production amount.

[0010] According to one aspect of the present invention, the renewable energy generating unit is equipped with a solar cell panel that generates power from sunlight, and further comprises a protection switch connected between the bidirectional single-phase inverter and the grid power source to turn on or turn off a power supply line; and the local control unit, in the process of controlling the bidirectional single-phase inverter to supply power from the bidirectional single-phase inverter to the grid power source, determines that a short-circuit fault has occurred when the current direction of the fourth output current is detected to be in the reverse direction, processes the protection switch to a turn-off state, and processes the short-circuit fault information to be transmitted to a power management server through a communication unit. Effects of the invention

[0011] The power management system based on real-time energy measurement data according to the present invention provides the advantage of facilitating real-time control of power production, storage, and release, while enabling stable power control and management with the grid power source. Brief explanation of the drawing

[0012] FIG. 1 is a block diagram illustrating a power management system based on real-time energy measurement data according to the present invention, and Figure 2 is a detailed circuit diagram according to an example of a power management system based on real-time energy measurement data of Figure 1. Specific details for implementing the invention

[0013] Hereinafter, a power management system based on real-time energy measurement data according to a preferred embodiment of the present invention will be described in more detail with reference to the attached drawings.

[0014] FIG. 1 is a block diagram showing a power management system based on real-time energy measurement data according to the present invention, and FIG. 2 is a detailed circuit diagram according to an example of the power management system based on real-time energy measurement data of FIG. 1.

[0015] Referring to FIGS. 1 and 2, the real-time energy measurement data-based power management system (100) according to the present invention comprises a fuel cell (102), an energy storage device (104), a solar panel (106), an isolated DC / DC converter (110), a bidirectional DC / DC converter (130), an MPPT converter (140), a step-up / step-down converter (150), a bidirectional single-phase inverter (170), a local control unit (190), a local communication unit (195), a weather station server (230), and a power management server (250).

[0016] The fuel cell (102) is constructed to generate electrical energy by electrochemically reacting fuel and an oxidant.

[0017] The fuel cell (102) may be a polymer electrolyte membrane fuel cell (PEMFC).

[0018] Polymer electrolyte fuel cells are designed to generate electricity by electrochemically reacting a fuel gas containing hydrogen with an oxidant gas containing oxygen. Polymer electrolyte fuel cells consist of a polymer electrolyte membrane that selectively transports hydrogen ions and an anode and a cathode formed on both sides of the polymer electrolyte membrane. Since the detailed structure is disclosed in various forms, such as Korean Registered Patent No. 10-0938948 and Korean Published Patent No. 10-2006-0098240, a detailed description is omitted.

[0019] These polymer electrolyte fuel cells offer excellent output characteristics, low operating temperatures, and fast start-up and response capabilities. Furthermore, since they can use hydrogen produced by reforming methanol, ethanol, or natural gas as fuel, they have the advantage of a wide range of applications, including mobile power sources, distributed power sources for homes and public buildings, and small power sources for electronic devices.

[0020] The energy storage device (ESS) (104) is configured to charge or discharge power through a built-in battery (not shown).

[0021] The solar cell panel (106) is applied as a renewable energy generating unit that generates power from renewable energy, and a plurality of solar cells are arrayed to generate power from incident sunlight.

[0022] It goes without saying that it can be constructed to generate power from wind and hydropower, even though it is not built, and output it through the first and second common input lines (150a) (150b).

[0023] The isolated DC / DC converter (110) converts power generated from the fuel cell (102) and output through the first and second output lines (102a) (102b) into an isolated DC voltage and outputs it through the first and second common output lines (150c) (150d).

[0024] The isolated DC / DC converter (110) is equipped with first to eighth switch elements (Q1 to Q8) and first and second coils (111) (112).

[0025] One end of each of the first and second switch elements (Q1)(Q2) is connected to the first and second output lines (102a)(102b) through which power generated from the fuel cell (102) is output, and the other end is connected in series with each other through the first series connection line (S1) and is turned on or turned off by the local control unit (190).

[0026] The third and fourth switch elements (Q3)(Q4) each have one end connected to the first and second output lines (102a)(102b) and the other end connected in series through the second series connection line (S2), and are turned on or turned off by the local control unit (190), and are connected in parallel with respect to the first and second switch elements (Q1)(Q2).

[0027] One end of each of the 5th and 6th switch elements (Q5)(Q6) is connected to the 1st and 2nd common output lines (150c)(150d) separated from the 1st and 2nd output lines (102a)(102b), and the other end is connected in series with respect to each other through the 3rd series connection line (S3) and is turned on or turned off by the local control unit (190).

[0028] The 7th and 8th switch elements (Q7)(Q8) each have one end connected to the 1st and 2nd common output lines (150c)(150d) and the other end connected to each other in series through the 4th series connection line (S4), and are turned on or turned off by the local control unit (190), and are connected in parallel to the 5th and 6th switch elements (Q5)(Q6).

[0029] One end of the first coil (111) is connected to the first series connection line (S1) and the other end is connected to the second series connection line (S2).

[0030] The second coil (112) is coupled with the first coil (111), and one end is connected to the third series connection line (S3) and the other end is connected to the fourth series connection line (S4).

[0031] The isolated DC / DC converter (110) has a winding ratio of 1:m between the first coil (111) and the second coil (112), and m is an integer greater than 2.

[0032] Here, a second capacitor (C2) that charges the supplied power is connected between the first common output line (150c) and the second common output line (150d).

[0033] In this isolated DC / DC converter (110), when the first and fourth switch elements (Q1)(Q4) are turned on or the third and second switch elements (Q3)(Q2) are turned on, power is induced in the second coil (112) in correspondence with the power applied through the first coil (111), and the power induced in the second coil (112) is charged into the first capacitor (C1) when the eighth and fifth switch elements (Q1)(Q4) are turned on or the sixth and seventh switch elements (Q3)(Q2) are turned on.

[0034] A bidirectional DC / DC converter (130) is connected between the ESS (104) and the first and second common input lines (150a) (150b) to convert the DC voltage in both directions. The first and second common input lines (150a) (150b) are each connected to the first and second common output lines (150c) (150d) through a step-up / step-down converter (150) described later. Here, a first capacitor (C1) for charging the supplied power is connected between the first common input line (150a) and the second common input line (150b).

[0035] The bidirectional DC / DC converter (130) is equipped with ninth and tenth switch elements (Q9)(Q10) and a first inductor (L1).

[0036] One end of each of the 9th and 10th switch elements (Q9)(Q10) is connected to the 3rd and 4th output lines (104a)(104b) leading from the ESS (104) to the bidirectional DC / DC converter (130), and the other end is connected in series with each other through the 5th series connection line (S5) and is turned on or turned off by the local control unit (190). Here, the 4th output line (104b) is connected in series with the 2nd common input line (150b).

[0037] One end of the first inductor (L1) is connected to the fifth series connection line (S5), and the other end is connected to the first common input line (150a).

[0038] In this bidirectional DC / DC converter (130), when the ninth switch element (Q9) is turned on or the tenth switch element (Q10) is turned on, the power stored in the first inductor (L1) is charged into the first capacitor (C1) or energy storage device (104).

[0039] The MPPT converter (140) is connected between the solar panel (106) and the first and second common input lines (150a) (150b), and outputs DC power by being controlled by the local control unit (190) by maximum power point tracking for the power output from the solar panel (106).

[0040] The MPPT converter (140) is equipped with 11th and 12th switch elements (Q11)(Q12) and a 2nd inductor (L2).

[0041] One end of each of the 11th and 12th switch elements (Q11)(Q12) is connected to the 1st and 2nd common input lines (150a)(150b), respectively, and the other end is connected to each other in series through the 6th series connection line (S6) and is turned on or turned off by the local control unit (190).

[0042] One end of the second inductor (L2) is connected to the sixth series connection line (S6), and the other end is connected to the fifth output line (106a) of the solar panel (106). The sixth output line (106b), which is separated and extended from the fifth output line (106a) of the solar panel (106), is connected in series with the second common input line (150b).

[0043] The step-up converter (150) is configured to step up the power input through the first and second common input lines (150a) (150b) and output it through the first and second common output lines (150c) (150d).

[0044] The step-up / step-down converter (150) is formed with the same structure as the previously described isolated DC / DC converter (110), so for convenience of explanation regarding the switching structure, the same reference numeral is assigned to the first to eighth switch elements (Q1 to Q8), and different reference numerals are assigned only to the first and second coils (151) (152).

[0045] Here, the winding ratio of the first coil (111) and the second coil (112) of the isolated DC / DC converter (110) is applied as 1:1, and the winding ratio of the first coil (151) and the second coil (152) of the step-up converter (150) is applied as 1:N, and N can be an integer greater than 2.

[0046] A second capacitor (C2) is connected between the first common output line (150c) and the second common output line (150d) of the step-up converter (150).

[0047] The bidirectional single-phase inverter (170) is configured to convert the DC voltage output from the step-up / step-down converter (150) through the first and second common output lines (150c) (150d) into AC voltage and supply it to the grid power supply (10).

[0048] The bidirectional single-phase inverter (170) is equipped with 13 to 16 switch elements (Q13 to Q16) and 3 and 4 inductors (L3) (L4).

[0049] One end of each of the 13th and 14th switch elements (Q13)(Q14) is connected to the 1st and 2nd common output lines (150c)(150d), respectively, and the other end is connected in series with each other through the 7th series connection line (S7) and is turned on or turned off by the local control unit (190).

[0050] One end of each of the 15th and 16th switch elements (Q15)(Q16) is connected to the 1st and 2nd common output lines (150c)(150d), respectively, and the other end is connected in series with each other through the 8th series connection line (S8), and is turned on or turned off by the local control unit (190), and is connected in parallel with the 13th and 14th switch elements (Q13)(Q14).

[0051] The third inductor (L3) is connected at one end through the seventh series connection line (S7) and at the other end is connected to the single-phase first commercial line (10a) of the system power supply (10).

[0052] The fourth inductor (L4) is connected at one end through the eighth series connection line (S8) and at the other end is connected to the single-phase second commercial line (10b) of the system power source (10).

[0053] Meanwhile, the first to 16th switch elements (Q1 to Q16) are each turned on or turned off depending on the presence or absence of a control signal from the local control unit (190) applied through the gate terminal. Additionally, a freewheel diode is connected in parallel to each of the first to 16th switch elements (Q1 to Q12) to support reverse current conduction.

[0054] The protection switch (175) is connected between the bidirectional single-phase inverter (170) and the grid power supply (10) and controls the power supply line to turn on or off by the control unit (190). A relay switch may be applied to the protection switch (175).

[0055] The first voltage detector (V1) (181) detects the first output voltage output from the fuel cell (102) and provides it to the local control unit (190).

[0056] The first current detector (I1) (185) detects the first output current output from the fuel cell (102) and provides it to the local control unit (190).

[0057] The second voltage detector (V2) (182) detects the second output voltage that is output from or input to the energy storage device (104) and provides it to the local control unit (190).

[0058] The second current detector (I2) (186) detects the second output current that is output from or input to the energy storage device (104) and provides it to the local control unit (190).

[0059] The third voltage detector (V3) (183) detects the third output voltage output from the solar panel (106) and provides it to the local control unit (190).

[0060] The third current detector (I3) (187) detects the third output current output from the solar panel (106) and provides it to the local control unit (190).

[0061] The fourth voltage detector (V4) (184) detects the fourth output voltage that is output from the bidirectional single-phase inverter (170) to the grid power source (10) or input from the grid power source (10) to the bidirectional single-phase inverter (170), and provides it to the local control unit (190).

[0062] The fourth current detector (I4) (188) detects the fourth output current that is output from the bidirectional single-phase inverter (170) to the grid power source (10) or input from the grid power source (10) to the bidirectional single-phase inverter (170), and provides it to the local control unit (190).

[0063] The local communication unit (195) is controlled by the local control unit (190) to transmit power monitoring information and provides power adjustment information transmitted from the power management server (250) to the local control unit (190).

[0064] The local control unit (190) receives the first output voltage (V1) and first output current (I1) of the fuel cell (102), the second output voltage (V2) and second output current (I2) of the energy storage device (104), the third output voltage (V3) and third output current (I3) of the solar panel (106), the fourth output voltage (V4) and fourth output current (I4) of the bidirectional single-phase inverter (170) from the first to fourth voltage detectors (181 to 184) and the first to fourth current detectors (185 to 188) to generate power monitoring information, and controls the operation of the isolated DC / DC converter (110), the bidirectional DC / DC converter (130), the MPPT converter (140), the step-up / step-down converter (150), and the bidirectional single-phase inverter (170).

[0065] Additionally, the local control unit (190) controls the operation of the isolated DC / DC converter (110), the bidirectional DC / DC converter (130), the MPPT converter (140), the step-up / step-down converter (150), and the bidirectional single-phase inverter (170) according to power adjustment information received from the local communication unit (195) from the power management server (250) via the communication network (50).

[0066] The local control unit (190) controls the corresponding elements according to the set operating pattern so that, when the charging condition is in place, the power generated from the solar panel (106) and the power generated from the fuel cell (102) are charged into the energy storage device (104), and when the discharging condition is in place, the power stored in the energy storage device is supplied to the grid power supply.

[0067] Here, the local control unit (190) controls the solar panel (106) or fuel cell (102) to supply power to the grid power source (10) when power supply is possible under discharge conditions.

[0068] Additionally, the local control unit (190) controls the operation of the isolated DC / DC converter (110), the bidirectional DC / DC converter (130), the MPPT converter (140), the step-up / step-down converter (150), and the bidirectional single-phase inverter (170) according to power adjustment information received from the local communication unit (195) from the power management server (250) via the communication network (50).

[0069] For example, when the local control unit (190) receives a signal from the power management server (250) via the local communication unit (195) to charge the surplus power of the grid power source (10), it controls the charging of power from the grid power source (10) to the energy storage device (104), and conversely, when it receives a signal from the power management server (250) via the local communication unit (195) to supply charging power to the grid power source (10), it controls the supply of power charged in the energy storage device (104) to the grid power source (10).

[0070] In this way, the local control unit (190) can charge the grid power (10) to the energy storage device (104) or discharge the power stored in the energy storage device (104) to the grid power (10) according to the set power management conditions or instructions from the power management server (250).

[0071] Additionally, when the local control unit (190) controls the bidirectional single-phase inverter (170) to supply power from the grid power source (10) to the bidirectional single-phase inverter (170), if it detects that the current direction of the fourth output current (I4) is reverse, that is, the current is flowing in the direction from the bidirectional single-phase inverter (170) toward the grid power source (10), it determines that there is an abnormal short-circuit accident and processes the protection switch (175) to the turn-off state, and processes the short-circuit accident information to be transmitted to the power management server (250) connected to the communication network (50) through the communication unit (195).

[0072] The power management server (250) records power monitoring information received from the local control unit (190) via the communication network (50) into the database (DB) (260). Additionally, the power management server (250) processes the power adjustment information determined according to a power operation model calculated based on the current and future power generation capabilities of the solar panel (106) and the load information output through the bidirectional single-phase inverter (170) from the received power monitoring information, as well as weather data received from the weather agency server (230), to be transmitted to the local control unit (190) via the communication network (50). Here, the power operation model installed in the power management server (250) is configured to determine whether to operate the fuel cell (102) and the operating time, and discharge conditions based on the amount of charged power stored in the energy storage device (104), according to the load amount required by the grid power source (10), when it is expected that a period will come when normal power generation is difficult due to clouds, rain, snow, etc., in relation to the power generation capacity of the solar panel (106).

[0073] This power management server (250) can be configured to transmit power adjustment information to a local control unit (190) so that power charging from the grid power source (10) to the energy storage device (104) is carried out during a set nighttime period, for example, from 1:00 AM to 3:00 AM, if it is determined from weather data regarding the expected weather received from the weather agency server (230) that the expected power production amount from the solar panel (106) during the set reference period falls short of the reference production amount. In this case, the local control unit (190) controls the power charging from the grid power source (10) to the energy storage device (104) to be carried out during the corresponding nighttime period.

[0074] The real-time energy measurement data-based power management system described above offers the advantage of facilitating real-time control of power production, storage, and release, while ensuring stable power control and management with the grid power source. Explanation of the symbols

[0075] 102: Polymer electrolyte fuel cell 104: Energy storage device 106: Solar panel 110: Isolated DC / DC converter 130: Bidirectional DC / DC Converter 140: MPPT Converter 150: Step-up / Step-down Converter 170: Bidirectional Single-Phase Inverter 190: Local control unit

Claims

Claim 1 A fuel cell; an isolated DC / DC converter that converts power generated from the fuel cell and output through first and second output lines into a DC voltage using an isolation method and outputs it through first and second common output lines; an energy storage device capable of charging or discharging power through a battery; a bidirectional DC / DC converter connected between the energy storage device and first and second common input lines to convert DC voltage in both directions; a bidirectional DC / DC converter connected to the energy storage device to convert DC voltage in both directions and converts power output from the energy storage device to output through first and second common input lines; a first capacitor connected between the first common input line and the second common input line; a renewable energy generation unit that generates power from at least one of solar, wind, and hydroelectric renewable energy; and a device connected between the renewable energy generation unit and the first and second common input lines and controlled by maximum power point tracking for the power output from the renewable energy generation unit. An MPPT converter; a step-up / step-down converter configured to step up the power input through the first and second common input lines and output it through the first and second common output lines; a bidirectional single-phase inverter configured to convert the DC voltage output from the step-up / step-down converter through the first and second common output lines into AC voltage and supply it to the grid power supply; a weather agency server that generates and provides weather data; a local control unit that receives the first output voltage and first output current of the fuel cell, the second output voltage and second output current of the energy storage device, the third output voltage and third output current of the renewable energy generation unit, and the fourth output voltage and fourth output current of the bidirectional single-phase inverter to generate power monitoring information, and controls the operation of the isolated DC / DC converter, the bidirectional DC / DC converter, the MPPT converter, the step-up / step-down converter, and the bidirectional single-phase inverter; and the power monitoring information controlled by the local control unit A local communication unit that transmits;A power management system based on real-time energy measurement data, comprising: a power management server that transmits power adjustment information to the local control unit according to a power operation model calculated based on power generation of the renewable energy generation unit and load information output through the bidirectional single-phase inverter from power monitoring information received from the local control unit via a communication network, and weather data received from the weather agency server; wherein the local control unit controls the operation of the isolated DC / DC converter, the bidirectional DC / DC converter, the MPPT converter, the step-up / step-down converter, and the bidirectional single-phase inverter according to power adjustment information received from the power management server via a communication network to the local communication unit. Claim 2 A real-time energy measurement data-based power management system according to claim 1, characterized in that if the power management server determines from weather data regarding the expected weather received from the weather agency server that the expected power production amount that can be produced from the solar panel in the future during a set reference period falls short of the reference production amount, it transmits power adjustment information to the local control unit to enable power charging from the grid power source to the energy storage device during a set nighttime period. Claim 3 A real-time energy measurement data-based power management system according to claim 1, wherein the renewable energy generation unit is equipped with a solar cell panel that generates power from sunlight, and further comprises a protection switch connected between the bidirectional single-phase inverter and the grid power source to turn on or turn off a power supply line; and wherein the local control unit, in the process of controlling the bidirectional single-phase inverter to supply power from the bidirectional single-phase inverter to the grid power source, determines that a short-circuit fault has occurred if the current direction of the fourth output current is detected to be in the reverse direction, processes the protection switch to a turn-off state, and processes the short-circuit fault information to be transmitted to a power management server through a communication unit. Claim 4 In paragraph 2, the isolated DC / DC converter comprises: first and second switch elements, each having one end connected to a first and second output line through which power generated from the fuel cell is output, and the other end connected in series with respect to each other via a first series connection line, and turned on or off by the local control unit; third and fourth switch elements, each having one end connected to the first and second output lines, and the other end connected in series with respect to each other via a second series connection line, and turned on or off by the local control unit, and connected in parallel with respect to the first and second switch elements; fifth and sixth switch elements, each having one end connected to the first and second common output line, and the other end connected in series with respect to each other via a third series connection line, and turned on or off by the local control unit; and the fifth and A power management system based on real-time energy measurement data, characterized by comprising: a sixth switch element connected in parallel with seventh and eighth switch elements; a first coil with one end connected to the first series connection line and the other end connected to the second series connection line; and a second coil coupled to the first coil, with one end connected to the third series connection line and the other end connected to the fourth series connection line. Claim 5 In paragraph 3, the bidirectional DC / DC converter comprises ninth and tenth switch elements, one end of which is respectively connected to the third and fourth output lines of the energy storage device and the other end of which is mutually connected in series through a fifth series connection line and is turned on or off by the local control unit; a first inductor, one end of which is connected to the fifth series connection line and the other end of which is connected to the first common input line; the MPPT converter comprises eleventh and twelve switch elements, one end of which is respectively connected to the first and second common input lines and the other end of which is mutually connected in series through a sixth series connection line and is turned on or off by the local control unit; and a second inductor, one end of which is connected to the sixth series connection line and the other end of which is connected to the fifth output line of the solar panel; the step-up / step-down converter is formed with the same structure as the isolated DC / DC converter, and the isolated DC / DC converter comprises the first coil and the The winding ratio of the second coil is 1:1, and the step-up / step-down converter has a winding ratio of the first coil to the second coil of 1:N, where N is an integer greater than 2, and the bidirectional single-phase inverter comprises 13th and 14th switch elements, each having one end connected to the first and second common output lines and the other end connected in series with each other via a 7th series connection line, which are turned on or off by the local control unit; 15th and 16th switch elements, each having one end connected to the first and second common output lines and the other end connected in series with each other via an 8th series connection line, which are turned on or off by the local control unit and are connected in parallel with the 13th and 14th switch elements; a third inductor, one end connected via the 7th series connection line and the other end connected to the first commercial line of the grid power source; and one end connected via the 8th series connection line and the other end of the grid power source A real-time energy measurement data-based power management system characterized by having a fourth inductor connected to a second commercial line, and a second capacitor connected between the first common output line and the second common output line.

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