KR102053812B1 - Method and system for controlling power conversion system connected to hybrid battery - Google Patents

Abstract

Various embodiments of the present invention satisfy the design conditions, considering the operating conditions of comparing the power output (P _s ) and the reference power (P _T ) output from the renewable energy generation facility, the power to the battery alone or simultaneously A mechanism is provided for controlling power conversion of at least one of the first and second power conversion systems to be charged.
Accordingly, various embodiments of the present invention can charge the power to each battery to the maximum by increasing the PCS efficiency by controlling the charging power of the corresponding power conversion system by dividing the charging power range (PCS output range) of each battery.

Description

METHOD AND SYSTEM FOR CONTROLLING POWER CONVERSION SYSTEM CONNECTED TO HYBRID BATTERY}

Various embodiments of the present invention relate to a charging control method and system for improving the operating efficiency of a power conversion system.

Recently, renewable energy is in the spotlight due to environmental pollution and lack of power. Renewable energy is energy used to recycle existing fossil fuels or convert renewable energy, such as solar energy, geothermal energy, marine energy, and bioenergy.

In order to efficiently manage such renewable energy, an energy storage system is required. The energy storage system can be accumulated when power is left and sent to the power system when it is not enough for stabilizing power. Furthermore, it can be used for emergencies such as power outages, and can also be used as a core infrastructure for the distribution of electric vehicles. Can be.

For example, the energy storage system stores solar-produced power generated in the morning and evening hours when the demand for power is low in the battery for peak load response, and discharges it to the power system during the day when the demand for power is high. In order to reduce the demand on the power system, the solar cell can supply the solar power generated by the battery to the power system by operating opposite the above time zone.

However, in the above case, it is difficult to predict solar power generation, so it is often impossible to access the power grid of the power system caused by the maximum power generation during the day, and the operation efficiency of the power conversion system due to the wide range of output fluctuations It was reduced, and there was a problem in that power stabilization was not achieved because the linkage of the energy storage system to the total amount of power of the power system was insufficient.

Korean Patent Registration No. 10-1795301, Registered Date: November 01, 2017 Title of the invention: Microgrid operating device and method considering PCS efficiency.

It is an object of the present invention to provide a charging control method and system for efficiently controlling the output range of a power conversion system in consideration of design conditions and / or operating conditions.

Another object of the present invention is to provide a charging control method and system for controlling a charging range of a hybrid battery in consideration of design conditions and / or operating conditions.

According to an embodiment of the present invention, an energy storage system for controlling the charging of a power conversion system connected to a hybrid battery, which converts the corresponding AC power output from the renewable energy generation facility into DC power to supply to the battery storage device. First and second power conversion systems; A battery storage device including a long period battery connected to the first power conversion system and a short period battery connected to the second power conversion system; And an energy management system for controlling power conversion of at least one of the first and second power conversion systems.

Here, the energy management system has a maximum received power P _{1 of} the first power conversion system equal to or greater than a reference power P _T , which is a reference for charging, and a maximum received power of the first power conversion system ( A design condition of a sum of P ₁ ) and a maximum received power P ₂ of the second power conversion system equal to or greater than a maximum power output P _max output from the renewable energy generation facility, and the renewable energy generation The charging control command related to the power conversion is transmitted to the corresponding power conversion system in consideration of an operating condition for comparing the power output P _s output from the facility with the reference power P _T.

In addition, the energy management system, when the power output (P _s ) is operating conditions of the first region and the third region smaller than the reference power (P _T ), the long-term battery type is the first charging power (B ₁ ) It may include a first PCS charging control unit for transmitting a first charge control command to the first power conversion system to be charged.

In this case, the first power conversion system may convert the AC power corresponding to the first charging power B ₁ into DC power according to the first charge control command and supply the DC power to the long period battery.

Further, the energy management system is configured to charge the long period type battery with a first charging power B ₁ when the power output P _s is a driving condition in a second region in which the reference power P _T is greater than the reference power P _T. And a second PCS charging control unit configured to transmit a second charge control command to the corresponding power conversion system so that the short period type battery is charged with the second charging power B ₂ .

In this case, the first power conversion system may convert the AC power corresponding to the first charging power B ₁ into DC power and supply the DC power to the long-period battery according to the second charging control command. The conversion system may convert the AC power corresponding to the second charging power B ₂ into DC power according to the second charging control command and supply the DC power to the short period type battery.

In this case, the sum of the first charging power B ₁ and the second charging power B ₂ may be the power output P _s .

On the other hand, according to another embodiment of the present invention, the energy management system for controlling the charging of the power conversion system connected to the hybrid battery, the criterion of the maximum acceptance power (P ₁ ) of the first power conversion system is the reference for the charge determination Equal to or greater than power P _T , and the sum of the maximum received power P _{1 of} the first power conversion system and the maximum received power P ₂ of the second power conversion system are output from the renewable energy generation facility. A design condition determination unit to determine a design condition equal to or greater than the maximum power output P _max ; And a first power conversion system connected to a long-period battery in consideration of an operating condition for comparing the power output P _s output from the renewable energy generation facility with the reference power P _T when all of the design conditions are satisfied. It provides an energy management system including an operation condition determination unit for controlling at least one of the power conversion and the power conversion of the second power conversion system connected to the short-period battery.

Here, the driving condition determination unit, if the power output (P _s ) is the operating conditions of the first region and the third region smaller than the reference power (P _T ), the long-term battery type is the first charging power (B ₁ ) It may include a first PCS charging control unit for transmitting a first charge control command to the first power conversion system to be charged.

In addition, when the power output P _s is a driving condition of a second region in which the power output P _s is greater than the reference power P _T , the long period type battery is charged with first charging power B ₁ , and at the same time, And a second PCS charging control unit configured to transmit a second charge control command to the corresponding power conversion system so that the short period type battery is charged with the second charging power B ₂ .

In this case, the sum of the first charging power B ₁ and the second charging power B ₂ may be the power output P _s .

On the other hand, according to another embodiment of the present invention, in the charge control method of the energy management system, the power output (P _s ) output from the renewable energy generation facility is less than the reference power (P _T ) which is the reference for the charge determination Controlling the first power conversion system such that the power output from the renewable energy generation facility is charged to the long-period battery if the operating conditions are small in the first area and the third area; And a first power conversion system and a second power conversion so that the power is simultaneously charged to a long-period battery and a short-period battery when the power output P _s is a driving condition of a second region in which the reference power P _T is greater than the reference power P _T. It provides a charging control method comprising the step of controlling the system.

The charging control method may include determining whether the maximum received power P ₁ of the first power conversion system is equal to or greater than the reference power P _T before controlling the first power conversion system. ; And when the condition of the determination is satisfied, the sum of the maximum received power P _{1 of} the first power conversion system and the maximum received power P ₂ of the second power conversion system is the maximum output from the renewable energy generation facility. The method may further include determining whether the power output P _max is greater than or equal to.

In this case, when the power charged in the long-period battery is the first charging power (B ₁ ), and the power charged in the short-period battery is the second charging power (B ₂ ), the first charging power (B ₁ ). And the sum of the second charging power B ₂ may be the power output P _s , and the second charging power B ₂ is the power output P _s − the first charging power B _1. Is charged in the short-period battery, and the first charging power B ₁ is charged in the long-period battery with the size of the power output P _s -the second charging power B ₂ . Can be.

As described above, various embodiments of the present invention smooth the instantaneous output fluctuation through a short cycle battery and achieve time shifting between peak time and demand peak time of renewable energy generation through a long cycle battery. There is an effect of increasing the charging efficiency.

In addition, various embodiments of the present invention divide the charging power range (PCS output range) of each battery and perform charging control of the corresponding power conversion system, thereby increasing the PCS efficiency and thereby charging power to each battery to the maximum.

Not limited to the above-mentioned effects, other effects that are not mentioned can be clearly understood by those skilled in the art from the following description.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings are provided to assist in understanding the present invention, and provide embodiments with a detailed description. However, the technical features of the present invention are not limited to the specific drawings, and the features disclosed in the drawings may be combined with each other to constitute new embodiments.
1 is a configuration diagram showing the configuration of an energy storage system according to a first embodiment of the present invention.
2 is a block diagram illustrating in more detail the operation condition determining unit 420 of the energy management system according to the first embodiment of the present invention.
3 is a graph illustrating a state of charge of a battery according to an operating condition of the energy management system of FIG. 2.
4 is a flowchart illustrating a charging control method of an energy management system according to a second exemplary embodiment of the present invention.
FIG. 5 is a graph illustrating a charging and discharging state of photovoltaic power generation considering a conventional time zone compared to the graph of FIG. 3 according to the present embodiments.

The terms disclosed in the following examples and claims are only used to describe specific examples, but are not limited thereto.

For example, the terms 'comprise' or 'comprise' disclosed in the following embodiments and claims are intended to mean that a corresponding component may be included unless specifically stated otherwise. It is to be understood that the present invention does not exclude other components, but includes other components.

In addition, terms such as “first” and “second”, which are disclosed in the following embodiments and the claims, are used to distinguish one component from another component, and the scope of rights is limited by these terms. It should not be. For example, the first component may be named a second component, and similarly, the second component may also be named a first component.

In addition, the "suffix" as a suffix for the components disclosed in the following description and the claims are given or used in consideration of ease of specification, and do not have meanings or roles that are different from each other. It is to be understood as meaning one unit or block or module that performs a particular function of the corresponding hardware configuration. In this case, the hardware configuration may be a modular configuration of the controller, but is not necessarily limited thereto.

In addition, the hybrid battery disclosed in the following description and claims should be understood as a concept in which various types of batteries are selectively charged or discharged.

Hereinafter, with reference to the accompanying drawings in terms of various hardware and methods will be described in more detail.

<First Embodiment>

1 is a configuration diagram showing the configuration of an energy storage system according to a first embodiment of the present invention.

Referring to FIG. 1, an energy storage system according to an exemplary embodiment of the present invention includes a renewable energy generation facility 100, a power conversion system 200 (PCS), and a battery storage device 300 (BMS). System) and the energy management system 400.

In this case, the power conversion system 200, the battery storage device 300, and the energy management system 400 may be collectively referred to as an 'energy storage system'.

First, the renewable energy generation facility 100 may convert the widely known solar energy, wind energy, marine energy or bio energy into electrical energy to produce electric power and then output it.

For example, when the renewable energy generation facility is a solar energy facility, the solar energy facility includes a plurality of solar cell modules 110 and the solar cell module 110 that convert electric energy into electrical energy to produce power. Inverter 120 for converting the DC power generated from the AC power can be made.

The power conversion system 200 converts the power output from the renewable energy generation facility 100 into direct current power according to an arbitrary charge control command of the energy management system 400 to be described later, so that the battery storage device to be described later. It can be supplied to 300 to charge.

In addition, the power conversion system 200 receives AC power radiated from the corresponding battery included in the battery storage device 300 according to an arbitrary discharge control command of the energy management system 400, and converts the supplied AC power into DC power. It can be converted to a power supply to the corresponding power system facility (500, also referred to as 'power system' for short).

The power conversion system 200 may include a first power conversion system 200A and a second power conversion system 200B. However, the present invention is not limited to the first power conversion system 200A and the second power conversion system 200B, and may be made up of more power conversion systems.

The battery storage device 300 may include a long period battery 310 connected to the first power conversion system 200A and a short period battery 320 connected to the second power conversion system 200B.

In this case, the long-period battery 310 and the short-period battery 320 may be lithium ion-based, respectively, and the long-period battery 310 is preferably Na-ion-based among the lithium-ion-based, and the short-period type The battery 320 may be Li-ion based among lithium ion based. However, the long-period battery 310 and the short-period battery 320 are not limited to lithium-ion-based batteries and the corresponding lithium-ion-based batteries.

For example, the long period battery 310 and the short period battery 320 may be different types of batteries of a lead battery series, sodium sulfur series, and redox flow series.

In this embodiment, the energy management system 400 includes a controller 400A and a data storage unit 430 to control power conversion of at least one of the above-described first and second power conversion systems 200A and 200B. The controller 400A may include a design condition determiner 410 and an operation condition determiner 420.

Here, the design condition determination unit 410 determines a design condition of whether the maximum received power P ₁ of the first power conversion system 200A is equal to or greater than the reference power P _T , which is a criterion for charging, first maximum receiving power of the power conversion system (200A) (P ₁₎ is a reference power (P _T) equal to or greater than the maximum acceptable power of the first power conversion system (200A) that is the basis for the charging is determined (P ₁₎ and A design condition may be determined whether the sum of the maximum received power P ₂ of the second power conversion system 200B is equal to or greater than the maximum power output P _max output from the renewable energy generation facility 100.

At this time, the first maximum receiving power of the power conversion system (200A) (P ₁₎ and a second maximum acceptable power of the power conversion system (200B) (P ₂₎ and a reference power that is the basis for the charging is determined (P _T) is a group Although it is preferably set and stored in the data storage unit 430 (eg, including a 'memory' or a 'database'), the maximum received power P ₁ of the first power conversion system 200A is the first power conversion. It may be a value obtained from the system 200A, and the maximum received power P ₂ of the second power conversion system 200B may be a value obtained from the second power conversion system 200B.

The maximum received power P ₁ of the first power conversion system 200A mentioned indicates the maximum amount of power that the first power conversion system 200A can accommodate, and the maximum received power of the second power conversion system 200B ( P ₂ ) indicates the maximum amount of power that the second power conversion system 200B can accommodate, and the maximum power output P _max of the renewable energy generation facility 100 is the maximum amount of power produced through the corresponding energy facility. Point to.

In one embodiment, the driving condition determination unit 420, if all of the above-described design conditions are satisfied, the renewable energy to substantially control the power conversion of at least one of the first and second power conversion system (200A, 200B). In consideration of the operating conditions for comparing the power output P _s output from the power generation facility 100 with the reference power P _T prestored in the data storage unit 430, a charge control command related to power conversion is generated. It can transmit to (200A, 200B).

The driving condition determination unit 420 will be described in detail as follows.

FIG. 2 is a block diagram illustrating in more detail the operation condition determining unit 420 of the energy management system according to the first embodiment of the present invention. FIG. 3 is a diagram showing charging of the battery according to the operating conditions of the energy management system of FIG. It is a graph showing the state.

As shown, the operating condition determiner 420 of the energy management system according to the first embodiment of the present invention controls substantially the power conversion of at least one of the first and second power conversion systems 200A and 200B. The first PCS charging control unit 421 and the second PCS charging control unit 422 may be further included to determine the driving condition.

The first PCS charging control unit 421 according to the present embodiment is a power output (P _s ) output from the renewable energy generation facility 100 is smaller than the reference power (P _T ) previously stored in the data storage unit 430 If the driving conditions of the first region and the third region, the first charge control command to the first long-term battery 310 connected to the first power conversion system 200A to charge the first charging power (B ₁ ). Can be sent to 200A.

In this case, the first power conversion system 200A generates the AC power corresponding to the first charging power B ₁ according to the first charging control command of the first PCS charging control unit 421 described above. ), And by converting the provided AC power into a DC power supply to the long-period battery 310, the power corresponding to the first charging power (B ₁ ) may be charged in the long-period battery 310. .

In the present embodiment, the second PCS charging control unit 422 is a power output (P _s ) output from the renewable energy generation facility 100 is larger than the reference power (P _T ) previously stored in the data storage unit 430 If the driving condition of the second region, the second charge control command to the first power conversion system 200A to charge the first charge power (B ₁ ) to the long-period battery 310 connected to the first power conversion system (200A). The second charge control command may be transmitted to the second power conversion system 200B such that the second charge power B ₂ is charged in the short period battery 320 connected to the second power conversion system 200B. .

In this case, the first power conversion system 200A receives the AC power corresponding to the first charging power B ₁ according to the second charging control command of the second PCS charging control unit 422 described above. ), And by converting the provided AC power into a DC power supply to the long-period battery 310, the power corresponding to the first charging power (B ₁ ) may be charged in the long-period battery 310. .

At the same time, the second power conversion system 200B generates AC power corresponding to the second charging power B ₂ according to the second charging control command of the second PCS charging control unit 422 described above. 100, and converts the provided AC power into DC power to supply the short cycle type battery 320, so that the power corresponding to the second charging power B ₂ may be charged in the short cycle battery 320. will be.

Here, when the power charged in the above-mentioned long-period battery 310 is the first charging power B ₁ and the power charged in the short-period battery 320 is the second charging power B ₂ , the first charging The sum of the power B ₁ and the second charging power B ₂ may be a power output P _s output from the renewable energy generation facility 100.

In this case, the second charging power B ₂ charged in the short cycle type battery 320 is the first power output P _s -long cycle type battery 310 output from the renewable energy generation facility 100. The short-term battery 320 will be charged by the size of the charging power B ₁ , and the first charging power B ₁ charged in the long-period battery 310 is the power output from the renewable energy generation facility 100. The output P _s -will be charged in the long-period battery 310 by the size of the second charging power (B ₂ ) that is charged in the short-cycle battery 320.

Second Embodiment

4 is a flowchart illustrating a charging control method of an energy management system according to a second exemplary embodiment of the present invention. In this case, FIG. 3 will be referred to as an assistant when describing steps 630 and 640 of FIG. 4.

Referring to FIG. 4, the charging control method according to an embodiment of the present invention may include steps 610 to 640.

First, in step 610, the energy management system 400 is pre-stored in the memory or the maximum received power P ₁ of the first power conversion system 200A obtained from the first power conversion system 200A is pre-stored in the memory. The design condition may be determined to be equal to or greater than the reference power P _T , which is a criterion for charging.

For example, when the maximum received power P ₁ of the first power conversion system 200A is equal to or greater than the reference power P _T , the plurality of power conversion systems 200A and 200B may primarily maintain normal design conditions. If it is deemed sufficient, and if the maximum received power P ₁ is not equal to or greater than the reference power P _T , the plurality of power conversion systems 200A, 200B may be considered to have abnormal design conditions.

In operation 620, the energy management system 400 may store the maximum power of the first power conversion system 200A previously stored in the memory or obtained from the first power conversion system 200A when the aforementioned primary design condition is normal. (P ₁₎ and stored in the memory or the second power conversion up to receive the second power conversion system (200B) obtained from the system (200B), the power (P ₂₎ the sum output from the renewable energy power generation facility 100 in the It is possible to determine design conditions that are equal to or greater than the maximum power output P _max .

For example, the energy management system 400 includes a first maximum capacity of the power conversion system (200A) the power (P ₁₎ and the second maximum capacity of the power conversion system (200B), the power (P _2), the renewable energy The sum of If it is equal to or greater than the maximum power output P _max output from the power generation facility 100, the plurality of power conversion systems 200A and 200B are secondarily considered to have normal design conditions, and the first power conversion system 200A. ) of the maximum acceptable power (P ₁₎ and the second power conversion system (200B), the maximum acceptable power (P ₂₎ sum the renewable energy power generation equipment (equal to the maximum power output (P _max) output from 100) or of the If not large, it can be considered secondary that a plurality of power conversion systems 200A, 200B have an abnormal design condition.

In operation 630, as shown in FIGS. 4 and 3, the energy management system 400 includes a reference power for which the power output P _s received from the renewable energy generation facility 100 is a reference for the charging decision previously stored in the memory. If the driving conditions are the first area and the third area smaller than P _T , the first power is controlled through the first charge control command so that the power output from the renewable energy generation facility 100 is charged in the long-period battery 310. The conversion system 200A can be controlled.

In this case, the first power conversion system 200A receives the AC power corresponding to the first charging power B ₁ from the renewable energy generation facility 100 according to the first charging control command transmitted from the energy management system 400. By receiving the supplied AC power by converting the received AC power into the long period battery 310, the power corresponding to the first charging power B ₁ may be charged in the long period battery 310.

In step 640, the energy management system 400, as shown in Figs. 4 and 3, the reference power that the power output (P _s ) received from the renewable energy generation facility 100 is a reference for the charge determination previously stored in the memory. If the driving condition is greater than P _T , the second power is supplied such that the power P _s output from the renewable energy generation facility 100 is simultaneously charged in the long period battery 310 and the short period battery 320. The first power conversion system 200A and the second power conversion system 200B may be controlled through the charge control command.

In this case, the first power conversion system 200A receives the AC power corresponding to the first charging power B ₁ from the renewable energy generation facility 100 according to the second charging control command described above, and receives the provided AC power. By converting the DC power to the long-period battery 310, the power corresponding to the first charging power (B ₁ ) may be charged in the long-period battery (310).

At the same time, the second power conversion system 200B receives the AC power corresponding to the second charging power B ₂ from the renewable energy generation facility 100 according to the above-described second charging control command, and receives the provided AC power. By converting power into DC power and supplying the short period battery 320, the power corresponding to the second charging power B ₂ may be charged in the short period battery 320.

Here, when the power charged in the above-mentioned long-period battery 310 is the first charging power B ₁ and the power charged in the short-period battery 320 is the second charging power B ₂ , the first charging The sum of the power B ₁ and the second charging power B ₂ may be a power output P _s output from the renewable energy generation facility 100.

In this case, the second charging power B ₂ charged in the short cycle type battery 320 is the first power output P _s -long cycle type battery 310 output from the renewable energy generation facility 100. The short-term battery 320 will be charged by the size of the charging power B ₁ , and the first charging power B ₁ charged in the long-period battery 310 is the power output from the renewable energy generation facility 100. The output P _s -will be charged in the long-period battery 310 by the size of the second charging power (B ₂ ) that is charged in the short-cycle battery 320.

Comparative Example

FIG. 5 is a graph illustrating a charging and discharging state of photovoltaic power generation considering a conventional time zone compared to the graph of FIG. 3 according to the present embodiments.

Comparing FIG. 3 and FIG. 5, if the power output P _s of the present embodiments shown in FIG. 3 is an operating condition of the first region and the third region smaller than the reference power P _T , the present embodiments may have a long period. When the first battery 310 may be charged with the first charging power B ₁ , and the operating condition of the second region in which the power output P _s is greater than the reference power P _T , the long battery 30 may be charged. The first charging power B ₁ may be charged, and at the same time, the short cycle type battery 320 may be charged with the second charging power B ₂ .

As described above, according to the present embodiment, the charging efficiency range (PCS output range) of each battery can be divided, thereby improving the charging efficiency and PCS (power conversion system) efficiency of each battery.

On the other hand, in the graph shown in FIG. 5, the discharge occurs in a time zone, for example, from 10 to 16 o'clock, and charges the battery in consideration of only the time zones in which the charge occurs in the remaining time zones, thereby maximally charging the battery. As a result, the charging efficiency of each battery and the power conversion system (PCS) efficiency were deteriorated.

Although the present invention has been described as described above, those skilled in the art will recognize that the present invention may be implemented in other forms while maintaining the technical spirit and essential features of the present invention. .

Therefore, the above-described embodiments are merely exemplary and are not intended to limit the scope of the present invention only to the above embodiments. In addition, the flowcharts shown in the drawings are merely exemplary in order to obtain the most desirable results in practicing the present invention, and other steps may be added or some steps may be deleted.

The scope of the present invention will be defined by the claims, but all modifications or variations derived from an equivalent configuration as well as a configuration directly derived from the claims are included in the scope of the present invention. Should be interpreted as

100: renewable energy power generation equipment
200: power conversion system
300: battery storage device
310: Long Cycle Battery
320: short cycle battery
200A: first power conversion system
200B: second power conversion system
400: Energy Management System
400A: controller
410: design condition determination unit
420: driving condition determination unit
421: first PCS charging control unit
422: second PCS charging control unit
430: data storage
500: power system equipment

Claims (14)

An energy storage system for controlling the charging of a power conversion system connected to a hybrid battery,
First and second power conversion systems for converting the corresponding AC power output from the renewable energy generation facility into DC power and supplying the same to the battery storage device;
A battery storage device including a long period battery connected to the first power conversion system and a short period battery connected to the second power conversion system; And
And an energy management system for controlling power conversion of at least one of the first and second power conversion systems.
The energy management system,
The maximum received power P ₁ of the first power conversion system is equal to or greater than the reference power P _T , which is a reference for charging, and the maximum received power P ₁ of the first power conversion system and the second. The sum of the maximum received power P ₂ of the power conversion system is equal to or greater than the maximum power output P _max output from the renewable energy generation facility, and the power output output from the renewable energy generation facility In consideration of an operating condition comparing P _s ) and the reference power P _T , a charge control command related to the power conversion is transmitted to a corresponding power conversion system.
The energy management system,
When the power output P _s is a driving condition smaller than the reference power P _T , a first charge control command is sent to the first power conversion system such that the first charge power B ₁ is charged only in the long period battery. A first PCS charging control unit for transmitting; And
When the power output P _s is an operating condition that is greater than the reference power P _T , the long-term battery type is charged with the first charging power B ₁ , and at the same time, the short-term battery type is charged with the second charging power B. A second PCS charging control unit for transmitting a second charging control command to a corresponding power conversion system so that ₂ ) is charged;
Energy storage system comprising a. delete The method of claim 1,
The first power conversion system,
The energy storage system according to claim ₁ , wherein the AC power corresponding to the first charging power B ₁ is converted into DC power and supplied to the long-period battery. delete The method of claim 1,
The first power conversion system,
In accordance with the second charge control command, converts AC power corresponding to the first charging power B ₁ into DC power and supplies the same to the long period battery,
The second power conversion system,
And an AC power corresponding to the second charging power B ₂ is converted into DC power and supplied to the short-period battery according to the second charging control command. The method of claim 5,
The sum of the first charging power (B ₁ ) and the second charging power (B ₂ ) is the power output (P _s ). An energy management system for controlling the charging of a power conversion system connected to a hybrid battery,
The maximum received power P ₁ of the first power conversion system is equal to or greater than the reference power P _T , which is a reference of the charging determination, and the maximum received power P ₁ and the second power conversion of the first power conversion system. A design condition determination unit that determines a design condition that the sum of the maximum received powers P ₂ of the system is equal to or greater than the maximum power output P _max output from the renewable energy generation facility; And
When all of the design conditions are satisfied, the first power conversion system connected to the long-period battery is considered in consideration of an operating condition for comparing the power output P _s output from the renewable energy generation facility with the reference power P _T. An operating condition determination unit controlling at least one of power conversion and power conversion of the second power conversion system connected to the short-term battery;
Including,
The driving condition determination unit,
When the power output P _s is a driving condition smaller than the reference power P _T , a first charge control command is sent to the first power conversion system to charge the long-term battery with a first charging power B ₁ . A first PCS charging control unit for transmitting; And
When the power output P _s is an operating condition that is greater than the reference power P _T , the long-term battery type is charged with the first charging power B ₁ , and at the same time, the short-term battery type is charged with the second charging power B. A second PCS charging control unit for transmitting a second charging control command to a corresponding power conversion system so that ₂ ) is charged;
Energy management system comprising a. delete delete The method of claim 7, wherein
The sum of the first charging power (B ₁ ) and the second charging power (B ₂ ) is the power output (P _s ). In the charge control method of the energy management system,
If the power output P _s output from the renewable energy generation facility is lower than the reference power P _T , which is the basis of the charging judgment, the power output from the renewable energy generation facility is charged only to the long-period type battery. 1 controlling a power conversion system; And
Controlling the first power conversion system and the second power conversion system such that the power is simultaneously charged to the long-period battery and the short-period battery when the power output P _s is greater than the reference power P _T. ;
Including, the charging control method. The method of claim 11,
Prior to controlling the first power conversion system,
Determining whether the maximum received power P ₁ of the first power conversion system is equal to or greater than the reference power P _T ; And
When the condition of the determination is satisfied, the sum of the maximum received power P _{1 of} the first power conversion system and the maximum received power P ₂ of the second power conversion system is the maximum power output from the renewable energy generation facility. Determining whether the output P _max is greater than or equal to;
Charge control method further comprising. The method of claim 12,
When the power charged in the long period battery is a first charging power (B ₁ ) and the power charged in the short period battery is a second charging power (B ₂ ), the first charging power (B ₁ ) and the The sum of the second charging powers B ₂ is the electric power output P _s . The method of claim 13,
The second charging power B ₂ is charged to the short-period battery with the magnitude of the power output P _s -the first charging power B ₁ , and the first charging power B ₁ is a power source. Output (P _s )-Charge control method characterized in that it is charged in the long-period battery having a magnitude of the second charging power (B ₂ ).

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