KR20220142826A - Household Spare Power Management System Equipped With ESS Using Renewable Energy Or Grid Power As A Power Source - Google Patents

Abstract

The present invention relates to a household reserve power transfer management system equipped with an ESS using renewable energy or grid power as a power source. The management system of the present invention comprises: a battery for storing power; a battery management unit for converting AC power supplied from the outside into DC power by an AC-DC converter to store the converted DC power in the battery, converting the DC power stored in the battery into AC power by a DC-AC inverter to supply the converted AC power to a load, and determining the amount of power stored in the battery; an output unit having a plurality of output ports for supplying the AC power to the load; a first switching unit for selectively supplying the external AC power or the converted AC power to the output port; a second switching unit for selectively supplying the external AC power to a first switch or the AC-DC converter; an AC monitoring unit for monitoring whether the external AC power is supplied; and a control unit controlling the first switching unit to supply the external AC power to the output port when it is determined that the AC power is supplied by the AC monitoring unit and controlling the first switching unit to supply the converted AC power to the output port when it is determined that the AC power is not supplied by the AC monitoring unit. In case of a power outage at home, it is possible to efficiently distribute the electrical energy of an energy storage unit to a load by more intuitively and easily reflecting the user's intention.

Description

Household Spare Power Management System Equipped With ESS Using Renewable Energy Or Grid Power As A Power Source

The present invention relates to a home reserve power transfer management system, and more particularly, to a home reserve electric power transfer management system equipped with an ESS using renewable energy or grid power as a power source.

In apartments, which currently occupy the majority of residential structures in Korea, the use of electronic loads such as boilers, lights, and refrigerators, including security facilities in the event of a power outage, is restricted. Accordingly, there is a problem in that it is difficult to maintain a minimum life such as heating function, food storage and cooking become impossible, and most electric lighting devices cannot be used. In addition, if there is a critically ill patient using a ventilator, the patient may be in an emergency situation. Against this background, interest in home energy storage systems is increasing recently.

Korea Patent Application No. 2017-0122442 relates to a home energy storage system, which has an energy storage unit, and when there is a power outage or an abnormality in the power system, electric energy is transferred from the energy storage unit to an essential load for life through the control of the smart distribution unit. The technology to supply is disclosed. Korean Patent Application No. 2017-0122442 analyzes a power usage pattern in order to extract a life essential load for preferentially supplying electrical energy from an energy storage unit. However, there is a problem in that it is difficult to properly reflect the intention of the user to extract the life essential load by analyzing the power usage pattern.

Korean Patent Application No. 2017-0122442 Korean Patent Application No. 2017-0122442

The present invention is to solve the above-mentioned problem, and it is an object of the present invention to provide a home reserve power transfer management system that more intuitively and easily reflects the user's intention during a power outage at home and efficiently distributes the electrical energy of the energy storage unit to the load. do it with

A home standby power transfer management system equipped with an ESS using renewable energy or grid power as a power source according to an aspect of the present invention includes a battery for storing power and AC power supplied from the outside by an AC-DC converter a battery management unit that is converted into DC power and stored in the battery, the DC power stored in the battery is converted into AC power by a DC-AC inverter to be supplied to the load, and a battery management unit that determines the amount of power stored in the battery; an output unit having a plurality of output ports for supplying AC power; a first switching unit configured to selectively supply the external AC power or the converted AC power to the output port; A second switching unit for selectively supplying the first switch or the AC-DC converter, an AC monitoring unit monitoring whether the external AC power is supplied, and the AC power being supplied by the AC monitoring unit When it is determined, the first switching unit is controlled so that the external AC power is supplied to the output port, and when it is determined that the AC power is not supplied by the AC monitoring unit, the converted AC power is supplied to the output port. and a control unit for controlling the first switching unit.

Preferably, the output unit further includes a load determination switch for designating a priority for each output port, and a third switch for determining whether to supply power to the output port. In addition, the control unit controls the third switch to supply the converted AC power to the corresponding output port according to the priority of the output port determined by the load determination switch.

Preferably, the output unit further includes a power measuring unit for measuring power consumption for each of the output ports. In addition, the control unit receives the expected power outage time, and the control unit outputs the converted AC power according to the battery power amount determined from the battery management unit, the priority and power consumption of the output port, and the expected power outage time. Determines the time of supply to the port.

Preferably, the load determination switch may designate a first and a second priority, and the control unit may supply the converted AC power to the output port of the first priority for a predetermined time additionally than the expected blackout time. control the switch.

According to the home standby power transfer management system of the present invention, it is possible to more intuitively and easily reflect the user's intention in the event of a power outage at home to efficiently distribute the electrical energy of the energy storage unit to the load.

1 is a diagram showing the configuration of a home standby power transfer management system according to an embodiment of the present invention.
FIG. 2 is a view for explaining the output unit shown in FIG. 1 .
FIG. 3 is a view for explaining a detailed configuration of an output port in the output unit shown in FIG. 2 .
FIG. 4 is a view for explaining an input/output signal of the control unit shown in FIG. 1 .

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In describing an embodiment of the present invention, if it is determined that a description of a related known function or configuration may unnecessarily obscure the gist of the present invention, the description thereof will be omitted.

1 is a diagram showing the configuration of a home standby power transfer management system 100 according to an embodiment of the present invention. As shown in FIG. 1 , the home standby power transfer management system 100 includes a battery 110 , a battery management unit 120 , an output unit 130 , a first switching unit 140 , and a second switching unit 150 . , an AC monitoring unit 160 , a control unit 170 , and the like.

The battery 110 is made in plurality to store power, and for this purpose, cells for storage may be installed in the casing by stacking or horizontal arrangement.

The battery management unit 120 converts external AC power supplied to the AC power supply unit 1 into DC power by the AC-DC converter 2 to be stored in the battery 110 , and the DC stored in the battery 110 . The power is converted into AC power by the DC-AC inverter (3) and supplied. The battery manager 120 may include devices or circuits for preventing overcharging, overdischarging, overcurrent, overheating, etc. of the battery 110 , and performing a function of managing the capacity of the battery 110 . In addition, the battery management unit 120 may transmit and receive control signals and data to and from an external device by the BMS communication unit 5 through wired communication through a cable or wireless communication using Bluetooth, Zigbee, RF, or the like.

The first switching unit 140 selectively supplies AC power and AC power converted by the DC-AC inverter 3 to a power source, for example, a device or equipment requiring power by switching. The second switching unit 150 allows external AC power to be selectively supplied to the first switch 140 or the AC-DC converter 3 . The first and second switching units 140 and 150 may be formed of switching elements such as relays and triacs.

The AC monitoring unit 160 is configured to monitor whether external AC power is supplied. The AC monitoring unit 160 is installed to monitor whether AC power is supplied from the AC power supply unit 1 through the AC power supply line, and may be formed of a circuit or sensing means to check whether the AC power is energized.

When it is determined that AC power is supplied by the AC monitoring unit 160 , the control unit 170 controls the first switching unit 140 so that external AC power is supplied to the output port, and by the AC monitoring unit 160 , When it is determined that AC power is not supplied, the first switching unit 140 is controlled so that the converted AC power is supplied to the output port. The control unit 170 may be configured to be added to the battery management unit 120 with a chip or circuit such as to form an integral with the battery management unit 120, and is made separately from the battery management unit 170 and connects the cable by the BMS communication unit 5. Control signals and data may be exchanged with the battery management unit 170 by wired communication through wired communication or wireless communication using Bluetooth, Zigbee, RF, or the like. The control unit 170 may allow the battery to be charged by the second switching unit 150 at night when the power condition is good.

The control unit 170 fully charges the battery 110 in the late night time when the electricity rate is low, and for example, 70% of the charged battery power is used prior to the system during normal hours to reduce the electricity rate, and the remaining 30% is blackout. It can be maintained as an emergency power supply in case of

As shown in FIG. 1 , the home standby power transfer management system 100 includes a user interface 6 . It is possible to display the output terminal on the user interface 6 to select the priority, and to output the on/off of the output port according to the expected power outage time. In addition, the user interface 6 outputs the result of selectively turning on/off the output terminal according to the elapsed time.

The home power reserve management system 100 is configured in a cube shape, and has a mood light and can be used as emotional lighting. In addition, it is possible to provide various alarms by providing a Bluetooth speaker for the woofer. The control unit 170 may send a message to the user's smartphone through the BMS communication unit 5 when the charging of the battery 110 is completed. The expected power outage time may be input from the user's smartphone through the BMS communication unit 5 .

FIG. 2 describes the output unit 130 illustrated in FIG. 1 , and FIG. 3 illustrates a detailed configuration of an output port in the output unit illustrated in FIG. 2 .

As shown in FIG. 2 , the output unit 130 includes a plurality of output ports 131 for supplying AC power to a load. The output unit 130 measures the load determination switch 132 for designating a priority for each output port 131, a switch 134 for determining whether to supply power to the output port, and the power consumption of the load connected to the output port. and a power measuring unit 133 that

The control unit 170 controls the switch 134 so that AC power converted to the corresponding output port is supplied according to the priority of the output port determined by the load determination switch 132 . The switch 134 receives the SW control signal from the control unit 170 to supply or cut off the connected AC power.

The power measuring unit 133 measures power consumption of a load connected to each output port. The user selects the load determination switch 132 to easily and intuitively designate the priority of the corresponding output port. The control unit 170 controls the switch 134 to supply AC power converted to the corresponding output port according to the priority of the output port 131 determined by the load determination switch 132 .

The load determination switch 132 according to the present embodiment may designate three levels of priorities. The control unit 170 may control the switch 134 so that AC power is supplied to the output port of the first priority for a time longer than the expected power outage time, for example, for twice the power outage time. A first priority may be selected for an output port to which a critical load is connected in the event of a power failure, such as a ventilator for critically ill patients.

FIG. 4 is a view for explaining an input/output signal of the controller 170 shown in FIG. 1 . As shown, the control unit 170 receives an expected power outage time through the input unit 4 , and receives an amount of battery power stored in the battery 110 from the battery management unit 120 . In addition, the control unit 170 receives the priority and power consumption of the output port, outputs the control signals (SW_1, SW_2, ... SW_n) to determine the time at which the converted AC power is supplied to the output port.

For example, assuming that the amount of power of the battery is 20 kWh and the expected blackout time input through the input unit 4 is 3 hours, the control operation of the controller 170 will be described as follows.

The control unit 170 receives priority and power consumption for each output port from the load determination switch 132 and the power measurement unit 133 . For example, it is assumed that the power consumption of the load designated with the first priority is 1 kW, the power consumption of the load designated with the second priority is 4 kW, and the power consumption of the load designated with the third priority is 2 kW.

The load connected to the output port designated with the first priority must not be interrupted in power supply, so for this purpose, the power is preferentially supplied over the output port of the other priority for a time longer than the expected power outage time, for example, twice the expected power outage time. make the supply happen. Since the expected power outage time is 3 hours, if the amount of electricity to be supplied to the first-priority load is secured for 6 hours, it is 6kWh. From the battery power of 20 kWh, 6 kWh of power is allocated to the first-priority load, and the remaining 14 kWh of power is allocated to the remaining loads.

Since the power consumption of the second priority load is 4 kW, in order to supply power during the expected blackout time of 3 hours, the control unit 170 allocates 12 kWh of power to the second priority, and allocates the remaining 2 kWh of power to the third priority load. do.

Since the power consumption of the third priority load is 2 kW, the control unit 170 controls the switch of the corresponding output port so that power is supplied only for one hour.

As a result, the control unit 170 causes power to be supplied to all loads for one hour from the blackout time, and blocks the power supply to the third priority load when one hour has elapsed from the blackout time. When 3 hours have elapsed from the blackout time, the power supply to the second priority load is also further cut off, and the control unit 170 controls the switch control signals SW_1, SW_2, . .. SW_n) is created.

The specific structural or functional descriptions presented in the embodiments of the present invention are merely exemplified for the purpose of describing the embodiments according to the concept of the present invention, and the embodiments according to the concept of the present invention may be implemented in various forms. In addition, it should not be construed as being limited to the embodiments described herein, and it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention.

110: battery
120: battery management unit
130: output unit
140: first switching unit
150: second switching unit
160: AC monitoring unit
170: control unit

Claims (5)

In the household reserve power transfer management system equipped with an ESS using renewable energy or grid power as a power source,
a battery that stores power,
AC power supplied from the outside is converted into DC power by an AC-DC converter and stored in the battery, and DC power stored in the battery is converted into AC power by a DC-AC inverter and supplied to the load, A battery management unit for determining the amount of power stored in the battery;
an output unit having a plurality of output ports for supplying AC power to a load;
a first switching unit for selectively supplying the external AC power or the converted AC power to the output port;
a second switching unit for selectively supplying the external AC power to the first switch or the AC-DC converter;
an AC monitoring unit for monitoring whether the external AC power is supplied;
When it is determined that the AC power is supplied by the AC monitoring unit, the first switching unit is controlled so that the external AC power is supplied to the output port, and it is determined that the AC power is not supplied by the AC monitoring unit a control unit for controlling the first switching unit so that the converted AC power is supplied to the output port when
Home reserve power transfer management system, characterized in that it comprises.
According to claim 1,
The output unit, the standby power transfer management system for home, characterized in that it further comprises a load determination switch for designating a priority for each output port, and a third switch for determining whether to supply power to the output port.
3. The method of claim 2,
The control unit is a home reserve power transfer management system, characterized in that for controlling the third switch so that the converted AC power is supplied to the corresponding output port according to the priority of the output port determined by the load determination switch.
According to claim 1,
The output unit is a home reserve power transfer management system, characterized in that it further comprises a power measuring unit for measuring the power consumption for each output port. 3. The method of claim 2,
The load determination switch may designate a first and a second priority,
The control unit is a home reserve power transfer management system, characterized in that for controlling the third switch so that the converted AC power is supplied to the output port of the first priority for a predetermined time additionally than the expected power outage time.

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