KR102151109B1 - AC/DC Hybrid power distribution panel system - Google Patents

Abstract

The present invention relates to an AC/DC hybrid distribution board system. According to the present invention, the AC/DC hybrid distribution board system comprises: an AC main circuit breaker transmitting AC power inputted from an AC power grid to an AC line; an AC auxiliary circuit breaker transmitting the AC power on the AC line to an AC/DC converter or transmitting the AC power converted by the AC/DC converter to the AC line; an AC/DC converter performing bidirectional power conversion between AC and DC; a DC main circuit breaker transmitting DC power converted in the AC/DC converter to a DC line or transmitting the DC power supplied to the DC line by a photovoltaic module or an energy storage system (ESS) to the AC/DC converter; and a control box controlling operations of the AC/DC converter and each circuit breaker and collecting AC power data and DC power data. According to the present invention, by suggesting the AC/DC hybrid distribution board system operated by being interworked with a system (AC power distribution box, and the like) for supplying the AC power and a micro grid (photovoltaic module, ESS, and the like) for supplying DC power, power may be simultaneously supplied to AC loads and DC loads with only a single distribution board.

Description

AC/DC hybrid power distribution panel system {AC/DC Hybrid power distribution panel system}

The present invention relates to an AC/DC hybrid distribution panel system, and more particularly, to an AC/DC hybrid distribution panel system capable of linking an AC distribution and a DC grid.

Existing distribution boards receive AC power from the system and distribute electricity to each load, and have a built-in blocking function to prevent electric shock or fire by blocking electricity when abnormal conditions such as overcurrent, short circuit, or short circuit occur.

However, most of the distribution boards are limited to supplying the power of the AC system, and there is a problem that it is difficult to downsize the distribution boards because the measurement sensor is not separately built-in.

Moreover, in recent years, DC microgrid technology using distributed power sources such as solar and ESS (energy storage devices) has been in the spotlight, but distribution panel systems that can operate by linking these microgrids and AC systems have not yet been commercialized. .

Accordingly, there is a need to develop a hybrid type distribution board system capable of operating by linking AC power by the grid and DC power by a micro grid.

The technology behind the present invention is disclosed in Korean Patent Publication No. 0655263 (announced on December 8, 2006).

An object of the present invention is to provide an AC/DC hybrid distribution board system capable of linking an AC distribution and a DC grid.

The present invention provides an AC main circuit breaker that transfers AC power input from an AC power grid to an AC line, and transfers AC power on the AC line to an AC/DC converter, or converts AC power converted by the AC/DC converter to the AC line. An AC auxiliary circuit breaker delivered to the line, an AC/DC converter that performs bidirectional power conversion between AC and DC, and the DC power converted by the AC/DC converter is delivered to a DC line, or a solar module or energy storage system ( Hereinafter, a DC main circuit breaker that delivers DC power supplied to the DC line by an ESS; Energy Storage System) to the AC/DC converter, and the AC/DC converter and the operation of each circuit breaker are controlled, and AC power data and DC It provides an AC/DC hybrid distribution board system including a control box for collecting power data.

In addition, the AC/DC hybrid distribution board system adjusts the DC power input from the AC line and the plurality of AC loads to a set condition and supplies the DC power input to the DC line to the plurality of AC sub-breakers arranged between the AC line and the plurality of AC loads. A PCS module to be configured, a plurality of DC sub-breakers disposed between the DC line and a plurality of DC loads, an ESS breaker disposed between the DC line and the ESS, and a PV disposed between the solar module and the PCS module It may further include a circuit breaker.

In addition, the AC main circuit breaker and the DC main circuit breaker each built-in measurement sensor for detecting an overload to be cut off when detecting an overload, the AC auxiliary circuit breaker, the AC sub circuit breaker, the DC sub circuit breaker, the ESS circuit breaker and the PV circuit breaker Each of the measuring sensors for detecting the earth leakage can be built-in so as to be blocked when detecting a leakage current.

In addition, the PCS module may MPPT control DC power input from the solar module and supply it to the DC line.

In addition, the PCS module may boost or reduce the voltage of the DC power input from the solar module to a set size and supply it to the DC line.

In addition, the control box, when the amount of power supplied on the DC line is greater than the amount of power consumed by DC loads, stores the amount of power surplus on the DC line as the ESS, and when insufficient, the power stored in the ESS is stored in the DC line. By discharging it, the amount of power can be balanced.

In addition, the control box balances the amount of power between the AC line and the DC line based on the amount of load consumption compared to the amount of power supplied on each line, and supplies the excess power amount on the AC line to the DC line through the AC/DC converter. Alternatively, the amount of power remaining on the DC line may be supplied to an AC line, thereby balancing the amount of power between the lines.

In addition, in the control box, the balancing index (I) may be calculated by the following equation.

In addition, the control box may perform the power amount balancing until the balancing index becomes smaller than a threshold value.

In addition, the control box monitors at least one measurement value of current, voltage, and power received from a measurement sensor provided for each circuit breaker, and when a sensing value measured by a predetermined circuit breaker is detected above a threshold for a set time, the Balancing the amount of power between the AC line and the DC line, but if the line to which the predetermined circuit breaker is connected is an AC line, the excess power on the DC line is supplied to the AC line, and if the DC line, the excess power on the AC line is supplied to the DC By supplying to a line, it is possible to balance the amount of power between the lines.

In addition, the AC/DC hybrid distribution panel system further includes a communication adapter for connecting the control box and the gateway to transmit the data collected from the control box to an external gateway, wherein the gateway is a user terminal and a network Can be connected.

According to the present invention, a single AC/DC hybrid type distribution board system that operates in connection with a system supplying AC power (AC distribution, etc.) and a micro grid supplying DC power (solar module, ESS, etc.) It is possible to supply power to AC loads and DC loads simultaneously with only the distribution board.

In addition, since the present invention enables power exchange between the AC line and the DC line, even when the supply of AC power from the grid is interrupted due to power failure, accident, disaster, etc., DC power provided by the micro grid (solar module, ESS) It enables independent operation of DC loads on DC lines as well as AC loads on AC lines.

Moreover, the present invention adaptively adjusts the bidirectional power conversion operation of the AC/DC converter according to the situation by considering the power consumption of each of the AC loads and the DC loads, and through this, the excess power transfer between the AC line and the DC line is Of course, there is an advantage of being able to perform power amount balancing.

1 is a schematic diagram of an AC/DC hybrid distribution panel system according to an embodiment of the present invention.
2 is a diagram showing the configuration of an AC/DC hybrid distribution board system according to a first embodiment of the present invention.
3 is a diagram conceptually showing the configuration of FIG. 2.
4 is a diagram showing the configuration of an AC/DC hybrid distribution board system according to a second embodiment of the present invention.

Then, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art can easily implement the present invention.

1 is a schematic diagram of an AC/DC hybrid distribution panel system according to an embodiment of the present invention.

As shown in FIG. 1, the AC/DC hybrid distribution board system largely includes an AC power supply unit 110, a power conversion module 120, a DC power supply unit 130, a control box 140, and a communication adapter 150.

The AC power supply unit 110 receives AC power from the system 10 (eg, KEPCO, a power supply company) and supplies AC power to various AC loads 40. The AC power supply unit 110 internally includes a plurality of AC circuit breakers and a plurality of AC measuring devices corresponding thereto.

The plurality of AC breakers in the AC power supply unit 110 include an AC main breaker (eg, MCCB; Molded Case Circuit Breaker) and a plurality of AC leakage breakers (eg, CB; Circuit Breaker), respectively.

The AC main breaker supplies or cuts off the AC power input from the grid 10 onto the AC line. The plurality of AC earth leakage circuit breakers receive the AC power supplied on the AC line and transfer them to the plurality of AC loads 40, respectively, or to the power conversion module 120 (AC/DC converter). For example, one of the AC earth leakage breakers is used to deliver AC power to the power conversion module 120, and the other is used to supply AC power to various AC loads.

Each AC circuit breaker in the AC power supply unit 110 performs a blocking function based on the sensing values (voltage, current, and power) of the AC measuring instrument. To this end, an AC meter may be correspondingly installed for each AC circuit breaker. Of course, the AC meter can be implemented (modularized) by being contained within an AC circuit breaker.

Each AC breaker is shut off when an overload or short circuit is detected. The AC meter can measure voltage, current, power, and the like, and may include a sensor for detecting at least one of a short circuit and an overload.

The power conversion module 120 (AC/DC converter) performs bidirectional power conversion between AC and DC, and operation control such as activation/deactivation of the voltage conversion operation, conversion direction, etc. may be performed by the control box 140. .

Here, when the operation of the AC/DC converter 120 is deactivated, the DC power supply unit 130 and the AC power supply unit 110 may be completely separated. In addition, when the power conversion operation in the direction from the AC power unit 110 toward the DC power unit 130 is activated, the AC/DC converter 120 receives AC power from the AC power unit 110 and converts it to DC power. It can be provided to the power supply unit 130, and the opposite direction operation is also possible.

That is, the power conversion module 120 may receive AC power from an AC line and convert it to DC power and then provide it to the DC line. Conversely, after receiving DC power from the DC line and converting it into AC power, It can be provided to the track side. In this way, the power conversion module 120 enables power exchange between the AC line and the DC line if necessary.

The AC power supply unit 110 receives DC power produced by the solar module 10, supplies DC power to various DC loads 40, and stores DC power as an ESS (Energy Storage System) 30. . The DC power supply unit 130 internally includes a plurality of DC circuit breakers and a plurality of DC measuring devices corresponding thereto.

The plurality of DC circuit breakers in the DC power supply unit 130 each include a DC main circuit breaker (eg, MCCB) and a plurality of DC ground fault circuit breakers (eg, CB).

The DC main breaker provides the DC power converted by the power conversion module 120 on the DC line, or the DC power supplied on the DC line by the photovoltaic module 20 or the ESS 30 is converted to the power conversion module 120 ). The plurality of DC earth leakage circuit breakers receive the DC power supplied on the DC line and supply it to the plurality of DC loads 50 or store it in the ESS 30 which is an energy storage system. Of course, some of the DC earth leakage breakers are used to supply or cut off DC power of the solar module 20.

Here, the plurality of DC earth leakage breakers are a circuit breaker connected between the DC line and various DC loads 50, a circuit breaker connected between the DC line and the ESS 30, and the DC line and the solar module 20. It can be classified as a breaker.

Accordingly, some of the DC earth leakage breakers are used to supply DC power on the DC line to various DC loads 50, some are used for power exchange (charge and discharge) between the DC line and the ESS 30, and another part It is used to supply DC power introduced from the solar module 20 to a DC line.

Like the AC power supply unit 110, each DC circuit breaker in the DC power supply unit 130 performs a blocking function based on the sensing values (voltage, current, and power) of the DC meter. To this end, a DC meter may be correspondingly installed for each DC circuit breaker. Of course, the DC meter can be implemented (modularized) by being included in the DC circuit breaker.

Each DC circuit breaker is shut off when an overload or short circuit is detected. The DC meter can measure voltage, current, power, and the like, and may include a sensor for detecting at least one of a short circuit and an overload.

The PCS (Power Conditioning System) module included in the DC power supply unit 130 is not included in the breaker element, but serves to supply the DC power on the DC line by adjusting or changing the DC power of the solar module 20 to a set condition. .

The solar module 20 is named as a solar cell module or a PV module, and generates DC power and supplies it to the DC power supply unit 130. The ESS 30 is an energy storage device, and may discharge (discharge) DC power stored in a battery and provide it to a DC line, or absorb and store (charge) DC power flowing on the DC line. The solar module 20 and the ESS 30 may correspond to components of a conventional micro grid (or smart grid).

The control box 140 controls the operation of the AC power supply unit 110, the power conversion module 120 (hereinafter, AC/DC converter), the DC power supply unit 130, and the communication adapter 150, respectively, and each driving state and observation Monitor the data.

The control box 140 includes data acquired from each component (e.g., AC power supply, DC power supply, power consumption of each of AC and DC loads, solar power production, ESS battery storage, and It collects the measured value and whether there is an abnormal state), and transmits the collected various data (distribution panel data) to the communication adapter 150.

The communication adapter 150 may provide the distribution panel data received from the control box 140 to an external gateway. The gateway may be installed in a premises, in a company, etc., and may provide distribution panel data to a user terminal (omitted) connected to a wired or wireless network. Of course, the AC/DC hybrid distribution panel system according to the present embodiment can also be installed and operated in the home, in the company, etc.

The user terminal may be equipped with a mobile app that supports the distribution panel data monitoring service, and through the mobile app, remote distribution panel data can be conveniently checked in real time.

In the following embodiment of the present invention, it is assumed that a measuring instrument (hereinafter, a measuring sensor) is built-in or mounted in each circuit breaker in the AC power supply unit 110 and the DC power supply unit 130. That is, each circuit breaker is modularized by mounting a measurement element, and is implemented to be cut off when an overload or a short circuit is detected by the measurement element.

In this way, when the measurement sensor is modularized in a circuit breaker, components can be miniaturized, safe construction, and convenient maintenance are possible, and functions and applications can be expanded by increasing the number of circuit breakers installed in the distribution board.

Next, an AC/DC hybrid distribution board system according to an embodiment of the present invention will be described in more detail.

FIG. 2 is a diagram showing a configuration of an AC/DC hybrid distribution board system according to a first embodiment of the present invention, and FIG. 3 is a diagram conceptually illustrating the configuration of FIG. 2.

2 and 3, the AC/DC hybrid distribution board system 100 according to the first embodiment of the present invention includes an AC main circuit breaker 111, an AC auxiliary circuit breaker 112, and a plurality of AC sub circuit breakers 113. ), AC/DC converter (120), DC main circuit breaker (131), PCS module (132), multiple DC sub-breakers (133), ESS circuit breaker (134), PV circuit breaker (135), control box (140), It includes a communication adapter 150.

The AC main circuit breaker 111 delivers AC power input from the AC power grid 10 to an AC line.

The AC auxiliary circuit breaker 112 transfers AC power on an AC line to the AC/DC converter 120 or transfers AC power converted by the AC/DC converter 120 to an AC line. That is, the AC auxiliary circuit breaker 112 transfers AC power between the AC line and the AC/DC converter 120 and may be controlled by the control box 140.

Here, as shown in FIG. 3, when the AC auxiliary circuit breaker 112 transfers the AC power received from the AC/DC converter 120 to the AC line, the received AC power is transferred to the grid (AC power grid) 10. To prevent reverse transmission (reverse inflow), the control box 140 may temporarily open the AC main circuit breaker 111 during the corresponding time period, or may block a power transmission path to the system 10 using a separate circuit breaker.

The plurality of AC sub-breakers 113 are disposed between the AC line and the plurality of AC loads 40 to supply AC power supplied on the AC line to the plurality of AC loads 40. The AC load may include general lighting, various electric devices in the bedroom/bathroom/kitchen, and indoor/outdoor air conditioners.

The AC/DC converter 120 performs bidirectional power conversion between AC and DC. Here, whether the AC/DC converter 120 is activated/deactivated, a power conversion direction, etc. may be controlled by the control box 140. Of course, when the AC/DC converter 120 is deactivated, the AC path and the DC path are completely separated, so that the AC load and the DC load can each be independently operated.

The DC main breaker 131 transfers the DC power converted by the AC/DC converter 120 to a DC line, or converts the DC power supplied to the DC line by the solar module 20 or ESS 30 to AC/DC. It is transmitted to the converter 120.

The plurality of DC sub-breakers 133 are disposed between the DC line and the plurality of DC loads 50 to supply DC power supplied on the DC line to the plurality of DC loads 50, respectively. DC loads can be varied, such as DC lighting driven by DC power.

Of course, depending on the use or purpose of the system, the plurality of DC sub-breakers 133 may include at least one of a circuit breaker for an electric vehicle (V2G-Vehicle to Grid) and a circuit breaker for a DC peer to peer (P2P). Here, in the case of an electric vehicle breaker, it is connected to the corresponding DC load to charge and discharge the DC load in the electric vehicle, and in the case of a DC P2P circuit breaker, it is connected to the corresponding DC load for power transaction, and the DC load is charged and discharged. You can trade power.

The ESS circuit breaker 134 is disposed between the DC line and the ESS 30. The ESS circuit breaker 134 stores (charges) DC power on the DC line to the ESS 30 under the control of the control box 140, or discharges (discharges) the DC power stored in the ESS 30 to the DC line. Do it.

To this end, the ESS circuit breaker 134 may use an ESS dedicated circuit breaker, and may be connected between the ESS circuit breaker 134 and the ESS 30 by an ESS cable.

The PV circuit breaker 135 is disposed between the photovoltaic module 20 and the PCS module 132, and transmits DC power introduced from the photovoltaic module 20 to the PCS module 132.

The PCS module 132 adjusts DC power input from the photovoltaic module 20 to a set condition and supplies it to a DC line. Here, the setting condition may mean a voltage and current condition for maximum power point tracking (MPPT) or a voltage condition of a preset size.

FIG. 2 shows a first embodiment in which the PCS module 132 performs MPPT control, and FIG. 4 shows a second embodiment in which the PCS module 232 increases or decreases the voltage to a preset voltage.

That is, in the case of FIG. 2, the PCS module 132 MPPT controls the DC power input from the solar module 20 and supplies the DC power to the DC line.

In addition, in FIG. 4, the PCS module 232 converts the voltage of DC power input from the solar module 20 to a set size and supplies it to a DC line. In this case, the DC loads 50 located at the rear end of the PCS module 232 operate by receiving the adjusted DC voltage. However, in the case of the second embodiment, an additional sub-breaker 236 may be added to the front end of the PCS module 232 for DC loads receiving voltage before adjustment (voltage conversion). This makes it possible to support various DC loads with different supply voltages.

2 and 4, the AC main breaker 111 and the DC main breaker 131 use MCCB (50A capacity), and the remaining breakers, such as AC auxiliary breaker 112, AC sub breaker 113, and DC sub breaker (133), the ESS circuit breaker 134 and the PV circuit breaker 135 illustrate the use of CB (30A capacity), but this is only one embodiment and the present invention is not necessarily limited thereto.

In addition, in this embodiment, the AC main breaker 111 and the DC main breaker 131 may each have built-in measurement sensors for overload detection so as to be cut off when an overload is detected, and the remaining breakers 112, 113, 133, 134, 135 are cut off when a leakage current is detected. Each of the measurement sensors for electric leakage detection can be built-in. Through this, the distribution board systems 100 and 200 may be composed of circuit breakers in which a measurement sensor is modularized.

The control box 140 controls and manages each component, as shown in FIG. 2. Specifically, the control box 140 controls the operation of the AC/DC converter 120, each of the circuit breakers 111, 112, 113, 131, 133, 134, 135 and the PCS module 132, collects AC power data and DC power data, and monitors various operating states. Monitor and monitor.

The control box 140 may control an open or closed state, an open or closed timing, and the like of the breakers 111, 112, 113, 131, 133, 134, 135, and control the operation of the AC/DC converter 120 as described above.

In addition, when the amount of power supplied on the DC line is greater than the amount of power consumed by the DC loads, the control box 140 stores the amount of surplus power on the DC line as the ESS 30, and when insufficient, the power stored in the ESS 30 It is also possible to balance the amount of electricity by discharging it to a DC line.

Further, the control box 140 may balance the amount of power between the AC line and the DC line based on the amount of load consumption compared to the amount of power supplied on each line. Here, the control box 140 may activate the AC/DC converter 120 and control a power conversion direction (AC->DC or DC->AC), an operation time, and a timing.

The control box 140 can balance the amount of power between lines by supplying the excess power on the AC line to the DC line through the AC/DC converter 120 or supplying the excess power on the DC line to the AC line. .

Specifically, the control box 140 calculates a balancing index (I) using Equation 1 below.

Here, the left term represents the ratio of the AC consumption of AC loads to the AC supply of the AC power grid. In addition, the right column shows the ratio of DC consumption of DC loads to the amount of DC power by the solar module and ESS.

If the total consumption of AC loads relative to the current AC supply is 70%, the left term is derived as 0.7, and when the total consumption of DC loads relative to DC supply is 50%, the right term is derived as 0.5.

In this case, the calculated balancing index I = 0.2, and the left and right sides have a ratio of 7:5, so it can be seen that the consumption of DC loads is relatively small and there is a lot of excess power on the DC line.

The control box 140 compares the balancing index (I) of Equation 1 with a preset threshold value (I _th ) in real time, and when the balancing index is greater than the threshold value, balances the amount of power until it becomes lower than the threshold value, Balance between AC and DC lines.

If the threshold value I _th =0.1, the currently observed balancing index (I = 0.2) is greater than the threshold value, so the control box 140 converts the excess DC power on the DC line into the AC/DC converter 120 Induces the I value to drop from 0.2 to 0.1 or less while supplying it to the AC line for a predetermined time. For example, induce a 7:5 ratio to narrow down to a ratio of 6.5:5:5 or less.

In this way, if the balancing index satisfies 0.1 or less, it is determined that the amount of power between the AC and DC lines is balanced to some extent, and the balancing operation can be stopped. Of course, as the threshold value approaches 0, higher performance balancing can be performed.

Here, since the balancing index is calculated in the form of an absolute value as shown in Equation 1, the reverse case is illustrated as follows. If the left and right sides are in a 4:7 ratio (I = 0.4), the consumption of AC loads is relatively small and there is a large amount of excess power on the AC side. In this case, the control box 140 supplies the excess AC power on the AC line to the DC line through the AC/DC converter 120 for a predetermined time, and induces the I value to fall from 0.4 to 0.1 or less. For example, you can induce a 4:7 ratio to narrow down to 5:6 or less.

In addition, the control box 140 may perform balancing by supplying power to an unstable line among AC and DC lines to induce stabilization.

To this end, the control box 140 monitors at least one measurement value of current, voltage, and power received from measurement sensors provided (built-in) for each breaker 111, 112, 113, 131, 133, 134, 135. The control box 140 balances the amount of power between the AC line and the DC line when the sensing value measured by a predetermined circuit breaker is detected above a threshold for a set time.

At this time, if the line to which the predetermined circuit breaker is connected is an AC line, the excess power on the DC line is supplied to the AC line, and if the DC line, the excess power on the AC line is supplied to the DC line to balance the amount of power between the lines and induce stabilization. have.

Meanwhile, the communication adapter 150 connected to the control box 140 transmits the data collected in the control box 140 to an external gateway. Here, the gateway may be connected to the user terminal through a network to provide distribution panel data to the user terminal.

According to the present invention, a single AC/DC hybrid type distribution panel system that operates in conjunction with a system supplying AC power (AC distribution, etc.) and a microgrid supplying DC power (solar module, ESS, etc.) It is possible to supply power to AC loads and DC loads simultaneously with only the distribution board.

In addition, since the present invention enables power exchange between the AC line and the DC line, even when the supply of AC power from the grid is interrupted due to power failure, accident, disaster, etc., DC power provided by the micro grid (solar module, ESS) It enables independent operation of DC loads on DC lines as well as AC loads on AC lines.

Of course, when the supply power of the DC grid is insufficient, the excess AC power is supplied to the DC line or the power stored in the ESS is discharged to the DC line to support stable driving of the DC load.

Moreover, the present invention adaptively adjusts the bidirectional power conversion operation of the AC/DC converter according to the situation by considering the power consumption of each of the AC loads and the DC loads, and through this, the excess power transfer between the AC line and the DC line is Of course, there is an advantage of being able to perform power amount balancing.

The present invention has been described with reference to the embodiments shown in the drawings, but these are only exemplary, and those of ordinary skill in the art will appreciate that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical scope of the present invention should be determined by the technical spirit of the appended claims.

100,200: AC/DC hybrid distribution board system
110: AC power supply 111: AC main breaker
112: AC auxiliary breaker 113: AC sub breaker
120: AC/DC converter 130: DC power supply
131: DC main breaker 132,232: PCS module
133: DC sub breaker 134: ESS breaker
135: PV breaker 140: control box
150: communication adapter 236: DC sub-breaker

Claims (11)

AC main circuit breaker for transmitting the AC power input from the AC power grid to the AC line;
An AC auxiliary circuit breaker for transferring AC power on the AC line to an AC/DC converter or for transferring AC power converted by the AC/DC converter to the AC line;
An AC/DC converter performing bidirectional power conversion between AC and DC;
The DC power converted by the AC/DC converter is transferred to a DC line, or the DC power supplied to the DC line by a solar module or an energy storage system (hereinafter, ESS; Energy Storage System) is transferred to the AC/DC converter. DC main breaker to transmit;
A plurality of AC sub-breakers disposed between the AC line and a plurality of AC loads;
A PCS module that adjusts DC power input from the solar module to a set condition and supplies it to the DC line;
A plurality of DC sub-breakers disposed between the DC line and a plurality of DC loads;
An ESS circuit breaker disposed between the DC line and the ESS;
A PV circuit breaker disposed between the solar module and the PCS module;
A control box for controlling the operation of the AC/DC converter and each breaker and collecting AC power data and DC power data; And
And a communication adapter for connecting the control box and the gateway to transmit the data collected from the control box to an external gateway,
The gateway is connected to the user terminal and the network,
The AC main breaker and the DC main breaker each have a built-in measurement sensor for overload detection so as to be cut off when an overload is detected,
The AC auxiliary circuit breaker, the AC sub circuit breaker, the DC sub circuit breaker, the ESS circuit breaker, and the PV circuit breaker each have a built-in measurement sensor for detecting a leakage current to be cut off when a leakage current is detected,
The PCS module,
MPPT control the DC power input from the solar module and supply it to the DC line, or boost or reduce the voltage of the DC power input from the solar module to a set size and supply it to the DC line,
The control box,
Monitors at least one measurement value of current, voltage, and power received from the measurement sensor provided for each circuit breaker, and when the sensing value measured by a predetermined circuit breaker is detected above a threshold for a set time, between the AC line and the DC line Balancing the amount of electricity,
If the line to which the predetermined circuit breaker is connected is an AC line, the amount of power surplus on the DC line is supplied to the AC line, and when the line is the DC line, the amount of power surplus on the AC line is supplied to the DC line to perform power amount balancing between the lines,
The control box,
When the amount of power supplied on the DC line is greater than the amount of power consumed by DC loads, the amount of excess power on the DC line is stored as the ESS, and when insufficient, the power stored in the ESS is discharged to the DC line to perform power amount balancing. and,
Balancing the amount of power between the lines by supplying the excess power amount on the AC line to the DC line through the AC/DC converter or supplying the surplus power amount on the DC line to the AC line,
A balancing index (I) of the following equation is calculated based on the amount of power supplied on each line compared to the amount of load consumption, and between the AC line and the DC line until the difference between the balancing index and a preset reference index becomes smaller than a threshold value. AC/DC hybrid distribution panel system that balances power.

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