KR102060270B1 - Hybrid type control power supplying apparatus and control power supplying method using the same - Google Patents

Abstract

Provided are a hybrid type control power supplying device capable of reducing a cost of a system and increasing space utilization, and a control power supplying method using the same. According to the present invention, the hybrid type control power supplying device comprises: a system power unit connected to an external power system; a charging module receiving current from the system power unit and storing power; a power conversion unit converting the current received from the system power unit or the charging module into direct current (DC) and outputting the DC; and a control power unit converting the power supplied from the power conversion unit into control power controlling operation of a system and outputting the control power.

Description

HYBRID TYPE CONTROL POWER SUPPLYING APPARATUS AND CONTROL POWER SUPPLYING METHOD USING THE SAME

The present invention relates to a mixed control power supply device and a control power supply method using the same, and more particularly, to supply a control power for controlling the operation of the system using a plurality of input power supply, the power system is abnormal (for example , A power supply control method using the same and a control-type mixed power supply that can prevent the power of the system to be turned off by supplying control power stably to the system even if a power failure, supply instability, etc.) occurs.

There are a plurality of subsystems in one system, and each subsystem is operated by operating power and control power. The operating power is the power used for the operation of the sub system, and the control power is the power used for the control of the sub system. The operating power and control power of each subsystem have different specifications depending on the system. For example, an energy storage system (ESS) may include subsystems such as a power conditioning system (PCS), a power management system (PMS), a battery management system (BMS), and the like. For this operation, operating power and control power are required.

In general, the control power is used to convert the AC (AC) to direct current (DC) by receiving the system power from an external power system. In addition, an uninterruptible power supply (UPS) may be additionally installed in the system to prevent the control power from being cut off due to an abnormality in the power system such as power failure or supply instability. Uninterruptible power supply is a device that provides a stable supply of power for stable use of equipment or systems, and is used to protect the system from sudden power outages.

However, in the case of using an existing uninterruptible power supply by connecting to equipment or a system, there is a problem in that the cost of the uninterruptible power supply is additionally generated and space space is additionally required to install the uninterruptible power supply.

Republic of Korea Patent Application Publication No. 10-2014-0033811 (2014.3.19), 5 to 6 pages

The present invention has been made in order to improve the conventional method as described above, it is possible to stably supply the control power by using a plurality of input power supply and to replace the uninterruptible power supply (UPS) using a battery or the like included in the system By providing a mixed control power supply and a control power supply method using the same to lower the system price and increase the space utilization.

The present invention replaces the uninterruptible power supply (UPS) to replace the lead acid battery every two to five years by using a battery included in the system, easy to maintain and manage, and to reduce the cost of maintenance and management mixed control power supply It provides a supply device and a control power supply method using the same.

The present invention provides a hybrid control power supply device and a control power supply method using the same that can be applied to various systems having a similar structure as well as an energy storage system (ESS).

The hybrid control power supply according to the present invention includes a system power unit connected to an external power system, a charging module for storing current by receiving current from the system power unit, and converting a current supplied from the system power unit or the charging module into direct current. And a control power supply for converting the power supplied from the power converter and the power supplied from the power converter into control power for controlling the operation of the system.

In one embodiment, the charging module is characterized in that it comprises a battery or a large capacity capacitor.

In one embodiment, the power converter converts the current supplied from the system power supply and outputs, when the external power system is abnormal, characterized in that for outputting by converting the current supplied from the charging module to DC. .

In one embodiment, the power converter is connected to the other power source, characterized in that for converting the power supplied from one of the system power supply unit, the charging module or other power source to the direct current to output.

In one embodiment, the power conversion unit converts the power supplied from the system power supply and outputs, if the abnormality in the external power system to convert the power supplied from the charging module or other power supply to direct current It features.

In one embodiment, the power converter is an AC-DC converter for converting the AC current supplied from the grid power supply to a direct current DC current, the first diode connected to the charging module and selectively flows the current, connected to the other power supply And a DC-DC converter for converting the DC current supplied from the first diode or the second diode and selectively converting the current into a DC.

In one embodiment, the control power unit is characterized in that it comprises a switching mode power supply for outputting a plurality of control power.

In one embodiment, the switching mode power supply is a third diode that is selectively connected to the AC-DC converter to pass the current, the fourth diode and the third diode that is connected to the DC-DC converter to selectively flow the current or And a plurality of DC-DC converters converting the DC current supplied through the fourth diode into a DC current corresponding to the specification of each control power source and outputting the DC current.

In one embodiment, the charging module is characterized in that the battery module of the energy storage system (ESS, Energy Storage System).

In an embodiment, the battery module supplies an uninterruptible power supply (UPS), a battery pack including a battery cell, a system power supply or a current supplied from the uninterruptible power supply to the battery pack, and a power system. If a failure occurs in the battery pack includes a power unit for supplying the current of the battery pack to the power conversion unit, a battery management system (BMS, Battery Management System) for monitoring the state of charge (SOC) of the battery pack It features.

In one embodiment, the battery module further comprises a switch for selectively supplying current to the power converter, the switch is characterized in that the connection (close) or short (open) in conjunction with the state of charge of the battery pack do.

In the control power supply method using the mixed control power supply according to the present invention, the power conversion unit converts and outputs the current supplied from the system power supply unit, and if an error occurs in the external power system, the power conversion unit is And converting the current supplied from the charging module into a direct current and outputting the converted direct current.

In one embodiment, the charging module corresponds to a battery module of the energy storage device, the control power supply method is a battery management system to monitor the state of charge of the battery pack and the switch in conjunction with the state of charge of the battery pack It further comprises the step of closing (close) or open (open).

As described above, the mixed control power supply apparatus and the control power supply method using the same according to the present invention can stably supply the control power using a plurality of input power and include in the system by replacing the uninterruptible power supply (UPS) By using the same battery, the cost of the system can be lowered and space utilization can be increased.

The mixed control power supply device and the control power supply method using the same according to the present invention maintains / manages by using the battery included in the system by replacing the uninterruptible power supply (UPS) that has to replace the lead acid battery every 2 to 5 years. It is easy and saves the maintenance cost.

The mixed control power supply device and the control power supply method using the same according to the present invention can be applied to various systems having a similar structure as well as an energy storage system (ESS).

1 is a configuration diagram showing a schematic configuration of a mixed control power supply according to an embodiment of the present invention
FIG. 2 is a diagram illustrating an embodiment of a power converter for control power supply of FIG. 1.
3 is a block diagram showing another embodiment of the power conversion device for a control power supply of FIG.
4 is a view for explaining a process of receiving a system power in the power converter for control power supply to the control power supply;
5 is a view for explaining a process of receiving power from a battery or other power supply to the control power in the power converter for control power when the power system abnormality;
6 is a configuration diagram showing a schematic configuration of a mixed control power supply according to another embodiment of the present invention
7 is a flowchart illustrating a control power supply method using a mixed control power supply device according to an embodiment of the present invention.

Hereinafter, a detailed description of the mixed control power supply and the control power supply method using the same according to the present invention will be described.

1 is a block diagram showing a schematic configuration of a mixed control power supply according to an embodiment of the present invention.

Referring to FIG. 1, the mixed control power supply device 100 includes a system power supply unit 110, a charging module 120, other power supply units 130, a power conversion unit 140 for a control power supply, a power conversion unit 150, and a control unit. The power supply unit 160 is included.

The system power supply unit 110 is connected to an external power system and receives an AC current from the power system and provides the system. The charging module 120 receives current from the system power supply unit 110 and stores power. The charging unit (not shown) may charge the charging module 120 by converting an alternating current provided from the system power supply unit 110 into direct current. In one embodiment, the charging module 120 may include a battery (battery) or a large capacity capacitor (capacitor).

The other power source 130 represents another auxiliary power source used as a power source for the control power source. The power source 110 is a power source that is used preferentially, and the other power source 130 is used as an emergency power source. In some embodiments, the mixed control power supply 100 may or may not include other power sources 130.

The power converter 140 for the control power supply is a hybrid power converter and supplies control power for controlling the operation of the system using multiple input power sources. For example, the control power converter 140 may supply control power using one of the system power supply unit 110, the charging module 120, or other power supply 130 as an input power source.

The power conversion unit 150 converts the current supplied from the system power supply unit 110, the charging module 120, or other power supply 130 into direct current and outputs the direct current. The power converter 150 may convert the input power into a DC of a preset size and output the converted DC. In one embodiment, the power conversion unit 150 converts and outputs a current supplied from the system power supply unit 110, but if an error occurs in the external power system received from the charging module 120 or other power supply 130 Current can be converted to direct current and output.

In one embodiment, when the mixed control power supply 100 does not include the other power source 130, the power conversion unit 150 direct current supplied from the grid power supply unit 110 or the charging module 120 Convert to and print it out. For example, the power conversion unit 150 converts the current supplied from the system power supply unit 110 and outputs the output, and when an error occurs in the external power system, converts the current supplied from the charging module 120 to DC and outputs the DC. can do.

The control power supply unit 160 converts the power supplied from the power conversion unit 150 into control power for controlling the operation of the system and outputs the control power. The control power supply unit 160 may convert the power supplied from the power converter 150 into control power having a preset size and output the converted power. In one embodiment, the control power supply unit 160 may include a plurality of converters and output a plurality of control powers simultaneously through the respective converters. Each subsystem may operate according to the control power output from the control power supply unit 160.

FIG. 2 is a diagram illustrating an embodiment of a power converter for control power supply of FIG. 1.

Referring to FIG. 2, the control power conversion device 140 includes a power conversion unit 150 and a control power supply unit 160. The power converter 150 includes an AC-DC converter 210, a first diode 220, a second diode 230, and a DC-DC converter 240, and the control power supply 160 includes a third diode ( 250, fourth diode 260, and direct-to-dc converter 270. 2 illustrates an example in which one control power is supplied from the power converter 140 for control power.

The AC-DC converter 210 converts an alternating current (AC) current supplied from the system power supply unit 110 into a direct current (DC) current and outputs it. AC power is supplied from the power system, but DC power is used to drive and control the system. The first diode 220 is connected to the charging module 120 and selectively flows the current, the second diode 230 is connected to the other power source 130 and selectively flows the current. For example, when an operating voltage is applied, the first diode 220 may flow a current of the charging module 120 to the DC-DC converter 240. When the operating voltage is applied, the second diode 230 may flow the current of the other power supply 130 to the DC-DC converter 240. When the other power source 130 is not connected, the second diode 230 may also be excluded from the configuration. In one embodiment, other switching circuits may be used instead of the first diode 220 and the second diode 230.

The DC-DC converter 240 converts the DC current supplied from the first diode 220 or the second diode 230 into DC and outputs the DC. For example, the DC-DC converter 240 may convert an input current into a DC current having a predetermined size and output the converted current.

The third diode 250 is connected to the AC-DC converter 210 to selectively flow current, and the fourth diode 260 is connected to the DC-DC converter 240 to selectively flow current. The DC-DC converter 270 converts the DC current supplied through the third diode 250 or the fourth diode 260 into a DC current corresponding to the standard of the control power and outputs the converted DC current. In one embodiment, other switching circuits may be used instead of the third diode 250 and the fourth diode 260.

3 is a configuration diagram illustrating another embodiment of the power converter for control power supply of FIG. 1.

Referring to FIG. 3, the control power conversion device 140 includes a power conversion unit 150 and a control power supply unit 160. The power converter 150 includes an AC-DC converter 310, a first diode 320, a second diode 330, and a DC-DC converter 340, and the control power supply 160 includes a third diode ( 350, a fourth diode 360 and a direct current-dc converter 370. 3 illustrates an example in which a plurality of control powers are supplied by the control power converter 140.

Hereinafter, for convenience of description, a description will be made mainly on a part different from FIG. 2. The configuration and operation of the AC-DC converter 310, the first diode 320, the second diode 330, the DC-DC converter 340, the third diode 350, and the fourth diode 360 are illustrated in FIG. 2. As described above.

3 may include a plurality of DC-DC converters 370a, 370b, 370c, 370d, .... Each DC-DC converter 370a, 370b, 370c, 370d,. The DC current supplied through the diode 350 or the fourth diode 360 is converted into a DC current corresponding to the specification of each control power source (control power source 1, control power source 2, control power source 3, control power source 4, ... For example, when used in an energy storage system (ESS), each control power source is an energy storage device such as a power conditioning system (PCS), a power management system (PMS), or a battery management system (BMS). Can be supplied to each of the constituting subsystems.

In one embodiment, the DC-DC converters 370a, 370b, 370c, 370d,..., Which supply control power may be selectively operated in conjunction with the state of charge (SoC) of the charging module 120. For example, When an error occurs in the external power system and the charging module 120 is used as an input power source, when the state of charge (SoC) of the charging module 120 falls below a preset first value, the DC-DC converter 370a , 370b, 370c, 370d, ... may be selectively operated, for example, at least one DC-DC converter 370a, 370b, 370c, 370d, ... may stop the operation. The DC-DC converters 370a, 370b, 370c, 370d, ... may be determined according to preset priorities, and the DC-DC converters 370a, 370b, 370c, 370d, which have the furthest supply cycle depending on the control voltage supply period. ... may be determined in order .. The state of charge SoC of the charging module 120 When falling below a preset second value, the switch of the charging module 120 may be shorted to open the power of the charging module 120 which is supplied to the control power converter 140.

4 is a view for explaining a process of receiving a system power in the power converter for control power supply to the control power supply.

Referring to FIG. 4, when the external power system is normally connected, the mixed control power supply receives the system power, and the power converter for the control power converts the system power into DC to supply the control power. For example, when no abnormality occurs in the external power system, the AC-DC converter 310 of the power conversion unit 150 converts the AC current supplied from the system power supply unit 110 into DC to control power supply unit 160. ). At this time, the first diode 320 and the second diode 330 are short-circuited so that no current flows.

The third diode 350 of the control power supply unit 160 is closed and the current supplied from the power converter 150 is supplied to the DC-DC converter 370. The DC-DC converter 370 converts the DC current supplied through the third diode 350 into a DC current corresponding to the standard of the control power and outputs the DC current.

FIG. 5 is a diagram for explaining a process of receiving power from a battery or other power source and supplying the control power to the control power supply when the power system is abnormal.

In case of abnormality in the power system such as power failure or unstable supply, the mixed control power supply receives power from the charging module 120 or other power supply 130, and the power converter for control power converts the input power into direct current. Supply with control power. For example, when an error occurs in the external power system, the DC-DC converter 340 of the power converter 150 converts the DC current supplied from the charging module 120 or the other power supply 130 into direct current. Supply to the control power supply 160.

In one embodiment, when the other power source 130 is first used as an input power source, the first diode 320 is shorted and the second diode 330 is closed to supply power from the other power source 130. Can be supplied. If an error occurs in the other power source 130 or when the other power source 130 is supplied with a value less than or equal to a preset value, the charging module 120 may be used as an input power source. In this case, the first diode 320 may be closed and the second diode 330 may be shorted.

In another embodiment, when the charging module 120 is first used as an input power source, the second diode 330 is shorted and the first diode 320 is closed so that the power supply from the charging module 120 is closed. Can be supplied. When an abnormality occurs in the charging module 120 or when the state of charge (SoC) of the charging module 120 falls below a preset value, the other power source 130 may be used as an input power source. In this case, the second diode 330 may be closed and the first diode 320 may be shorted.

The fourth diode 360 of the control power supply unit 160 is closed and the current supplied from the power converter 150 is supplied to the DC-DC converter 370. The DC-DC converter 370 converts the DC current supplied through the fourth diode 360 into a DC current corresponding to the standard of the control power and outputs the converted DC current. In this case, the third diode 350 may be shorted.

6 is a configuration diagram showing a schematic configuration of a mixed control power supply according to another embodiment of the present invention.

6 is an example where a mixed control power supply is used for the energy storage device (ESS). Referring to FIG. 6, the mixed control power supply 600 includes grid power supplies 610a and 610b, a control power converter 620, a battery module 630, and other power sources 640. The control power converter 620 includes a power converter 622, a control power supply 624, and a power management system (PMS) 626, and the battery module 630 includes an uninterruptible power supply (UPS). ) 631, a power unit 633, a battery pack 635, a battery management system (BMS) 637, and a switch 639.

Hereinafter, for convenience of description, a description will be made with respect to a part different from FIG. 2 or FIG. 3. Power management system (PMS) 626 manages the overall system operation of the energy storage device (ESS). For example, power management system 626 monitors the power generation and storage status and controls the system. In one embodiment, the power management system 626 detects the abnormal signal of the external power system to control the mixed control power supply. For example, when an abnormal signal of an external power system is detected, the power management system 626 drives an uninterruptible power supply (UPS) 631 to charge the battery pack 635 and switches of the battery module 630. 639 is closed to supply the power charged in the battery pack 635 to the power converter 620 for the control power. When the abnormal signal of the external power system is not detected, the power management system 626 short-circuits the switch 639 and supplies control power to the system using the power supplied from the system power supply unit 610a as the input power. do.

The battery pack 635 is composed of a plurality of battery cells that store power. The power unit 633 charges the battery pack 635 by supplying a current supplied from the grid power supply unit 610b or the uninterruptible power supply 631 to the battery pack 635, and when an abnormality occurs in the power system, the battery pack ( The current charged in 635 is supplied to the power converter 622. The battery management system (BMS) 637 monitors the state of charge (SOC) of the battery pack 635 and controls the battery pack 635.

The switch 639 selectively supplies the current charged in the battery pack 635 to the power converter 622. For example, when an abnormal signal of the external power system is detected, the power management system 626 connects the switch 639 to close the power charged in the battery pack 635 to control power conversion device 620. To feed. In one embodiment, the switch 639 may be closed or open in conjunction with the state of charge (SoC) of the battery pack 635. For example, the battery management system (BMS) 637 communicates with the power management system (PMS) 626 to monitor the state of charge of the battery, and in the event of an abnormality in the external power system (eg, during a power outage). ) When the lower limit fault occurs in the state of charge (SoC) of the battery, the power management system (PMS) 626 is controlled by shorting the switch 639 through the battery management system (BMS) 637. The battery power supplied to the power converter 620 for power is cut off.

In one embodiment, when an abnormal signal of the external power system is not detected, the power management system 626 may control as follows.

When the abnormal signal of the external power system is not detected, the power management system 626 calculates an estimated power requirement of each subsystem to supply control power through Equation 1 below.

[Equation 1]

Where H _predict is the estimated power requirement of each subsystem, P (S _n ) is the hourly power requirement of the _nth subsystem (S _n ), and t _{avg_i} is the statistically calculated past external power system abnormality period (period) to be.

인 경우, 파워관리시스템(626)은 배터리 관리 시스템(BMS)(637)을 통해 배터리 모듈(630)의 스위치(639)를 연결(close)한다. 스위치(639)가 연결되면, 파워관리시스템(626)은 제어전원용 전력변환장치(620)에 포함된 제어전원부(160)의 제4 다이오드(260, 360) 연결(close)하고, 직류-직류변환기(270, 370)를 동작시킨다. 여기에서 H_charged는 현재 배터리 모듈(630)에 충전된 전력량을 말한다.if,

In this case, the power management system 626 closes the switch 639 of the battery module 630 through the battery management system (BMS) 637. When the switch 639 is connected, the power management system 626 closes the fourth diodes 260 and 360 of the control power supply unit 160 included in the power converter 620 for the control power, and converts the DC-DC converter. 270 and 370 are operated. Here, H _charged refers to the amount of power currently _charged in the battery module 630.

인 경우, 파워관리시스템(626)은 배터리 관리 시스템(BMS)(637)을 통해 배터리 모듈(630)의 스위치(639)를 단락(open)시킨다. 여기에서 Th1은 기 설정된 제1 문턱값(Threshold)을 말한다. 일 실시예에서, 제1 문턱값은 설정되지 않을 수도 있다.if,

In this case, the power management system 626 opens the switch 639 of the battery module 630 through the battery management system (BMS) 637. Here, Th1 refers to a preset first threshold. In one embodiment, the first threshold may not be set.

인 경우, 파워관리시스템(626)은 배터리 관리 시스템(BMS)(637)을 통해 배터리 모듈(630)의 스위치(639)를 연결(close)한다. 스위치(639)가 연결되면, 파워관리시스템(626)은 제어전원용 전력변환장치(620)에 포함된 제어전원부(160)의 제4 다이오드(260, 360) 연결(close)하고, 직류-직류변환기(270, 370)를 동작시킨다. 이때, 파워관리시스템(626)은 서브 시스템에 제어 전원을 공급하는 직류-직류변환기들(370a, 370b, 370c, 370d, …370n)을 선택적으로 가동 중단할 수 있다.if,

In this case, the power management system 626 closes the switch 639 of the battery module 630 through the battery management system (BMS) 637. When the switch 639 is connected, the power management system 626 closes the fourth diodes 260 and 360 of the control power supply unit 160 included in the power converter 620 for the control power, and converts the DC-DC converter. 270 and 370 are operated. In this case, the power management system 626 may selectively shut down the DC-DC converters 370a, 370b, 370c, 370d,... 370n for supplying control power to the subsystem.

For example, the power management system 626 may selectively shut down the DC-DC converters 370a, 370b, 370c, 370d,... 370n through Equation 2 below.

[Equation 2]

Here, P () is a score calculation function according to the difference between the predicted value and the current measured value (H _predict -H _current ), n _{priority'n '} is the number of nth priority subsystem (S _priority'n' ), f (S _{priority'n '} ) is a contribution score calculation function of the nth _priority subsystem (S _priority'n' ), and n represents a natural number. In one embodiment, the score calculation functions P () and f () may be preset. For example, P () may be a function for calculating a predetermined score for each section according to the difference between the expected value and the current measured value. f () may be a function for calculating a predetermined score for each priority of the subsystem.

The power management system 626 continuously monitors the amount of power (H _charged ) currently charged in the battery module 630 to calculate Equation 2, and if the Equation 2 is satisfied, the lowest priority 'n' satisfies. DC-to-DC converters 370a, 370b, 370c, 370d, ... 370n of ') are shut down. Thereafter, when H _current is smaller than Th1, the power management system 626 shorts the switch 639 of the battery module 630.

7 is a flowchart illustrating a control power supply method using a mixed control power supply device according to an embodiment of the present invention.

Referring to FIG. 7, the power conversion unit 150 of the mixed control power supply device 100 or 600 converts and outputs the current supplied from the system power supply unit 110 (step S710). The power management system (PMS) monitors whether there is a problem with the external power system. When the abnormal signal of the external power system is detected, that is, when an abnormality occurs in the power system (step S720), the power conversion unit 150 converts the current supplied from the charging module 120 to DC and outputs it (step S730). In another embodiment, when an abnormality occurs in the power system (step S720), the power converter 150 may convert the current supplied from the other power source 130 into direct current.

In one embodiment, when charging module 120 is battery module 630, battery management system (BMS) 637 monitors the charging state of battery pack 635, and switch 639 is battery pack 635. In connection with the state of charge of the can be closed (close) or open (short). For example, when a lower limit fault occurs in a state of charge (SoC) of a battery in a state where an external power system is abnormal (for example, during a power failure), the power management system (PMS) 626 may switch a switch ( The battery power supplied to the control power converter 620 may be cut off by shorting 639.

The control power supply method using the mixed control power supply described with reference to FIGS. 1 to 7 may also be implemented in the form of a recording medium including instructions executable by a computer, such as an application or a module executed by a computer. .

Computer readable media can be any available media that can be accessed by a computer and includes both volatile and nonvolatile media, removable and non-removable media. In addition, computer readable media may include both computer storage media and communication media. Computer storage media includes both volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, modules or other data. Communication media typically includes computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave, or other transmission mechanism, and includes any information delivery media.

A module may mean hardware capable of performing functions and operations according to each name described in the specification, and may also mean computer program code capable of performing specific functions and operations. It may also mean an electronic recording medium, eg, a processor, on which computer program code capable of performing specific functions and operations is mounted.

Although the embodiments of the present invention have been described above, the technical idea of the present invention is not limited to the above embodiments, and a mixed control power supply device using various spatial recognition and a control power supply using the same without departing from the technical idea of the present invention. It can be implemented in a way.

100: mixed control power supply
110: grid power supply
120: charging module
130: other power
140: power converter for control power
150: power conversion unit
160: control power supply

Claims (14)

A grid power supply unit connected to an external power system;
A charging module that receives electric current from the grid power supply unit and stores electric power;
A power converter converting and outputting a current supplied from the grid power supply unit or the charging module into direct current;
A control power supply for converting and outputting the power supplied from the power converter into control power for controlling the operation of the system; And
Including a power management system,
The power management system calculates an estimated power requirement of each sub-system to supply control power through Equation 1 below,
[Equation 1]

Where H _predict is the estimated power requirement of each subsystem, P (S _n ) is the hourly power requirement of the _nth subsystem (S _n ), and t _{avg_i} is the statistically calculated past external power system abnormality period (period)

If is
The power management system is a hybrid control power supply to selectively shut down the DC-DC converter for supplying control power to each of the subsystems through the following equation (2).
[Equation 2]

Here, Th ₁ is a preset threshold, H _charged is the amount of power currently charged
P () is a score calculation function based on the difference between the predicted value and the current measured value (H _predict -H _current ), n _{priority'n '} is the number of nth priority subsystems (S _priority'n' ), f (S _{priority'n '} ) is a contribution score calculation function of the nth _priority subsystem (S _priority'n' ), where n is a natural number. The method of claim 1,
The charging module is a mixed control power supply including a battery or a large capacity capacitor. The method of claim 1,
The power converter converts and outputs the current supplied from the system power supply unit, when the external power system is abnormal, the mixed control power supply for converting the current supplied from the charging module to output the DC. The method of claim 1,
The power converter is connected to the other power source,
Mixed control power supply for converting the power supplied from one of the grid power supply unit, charging module or other power supply to direct current. The method of claim 4, wherein
The power conversion unit converts and outputs the power supplied from the system power supply unit, if a failure occurs in the external power system mixed type control power supply for converting and outputting the power supplied from the charging module or other power source to direct current. The method of claim 4, wherein the power conversion unit
An AC-DC converter for converting and outputting an AC current supplied from the grid power supply unit into a DC current;
A first diode connected to the charging module to selectively flow current;
A second diode connected to the other power source to selectively flow current; And
And a direct current-to-direct current converter for converting the direct current supplied from the first diode or the second diode into direct current. The method of claim 6, wherein the control power supply unit
Mixed control power supply comprising a switching mode power supply for outputting a plurality of control power. 8. The power supply of claim 7, wherein the switched mode power supply is
A third diode connected to the AC-DC converter to selectively flow current;
A fourth diode connected to the DC-DC converter to selectively flow current; And
And a plurality of DC-DC converters converting the DC current supplied through the third diode or the fourth diode into DC current corresponding to the specification of each control power and outputting the DC current. The method of claim 1,
The charging module is a mixed control power supply corresponding to the battery module of the energy storage system (ESS, Energy Storage System). The method of claim 9, wherein the battery module
Uninterruptible Power Supply (UPS);
A battery pack including a battery cell;
A power unit for supplying a current supplied from the grid power supply unit or the uninterruptible power supply to the battery pack, and supplying a current of the battery pack to the power conversion unit when an error occurs in a power system; And
Mixed control power supply comprising a battery management system (BMS) for monitoring the state of charge (SOC) of the battery pack. The method of claim 10, wherein the battery module
Optionally further comprising a switch for supplying a current to the power conversion unit,
The switch is a mixed control power supply that is connected to (close) or short (open) in conjunction with the state of charge of the battery pack. delete In the control power supply method using the mixed control power supply of claim 1,
Converting and outputting a current supplied from the system power supply by the power conversion unit; And
The control power supply method comprising the step of outputting by converting the current supplied from the charging module to a direct current when the external power system is abnormal. The method of claim 13,
The charging module corresponds to the battery module of the energy storage device,
Monitoring, by the battery management system, the state of charge of the battery pack; And
The control power supply method further comprises the step of closing (close) or open (open) in conjunction with the state of charge of the battery pack.

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