KR20140041977A - Battery energy storage system and management method thereof - Google Patents

Abstract

The present invention relates to a battery energy storage system and an operating method thereof, capable of economically operating a battery with a large capacity for a wind farm. The present invention contributes to the improvement of profitability of a generation provider by maximizing the lifetime of the battery with the large capacity and suggests an optimum scheme when the capacity of the battery applied to the wind farm is selected and designed. [Reference numerals] (201) Information collection unit; (202) Wind power generation amount prediction unit; (203) High-capacity battery charge and discharge scheduling unit; (204) High-capacity battery operation range calculation unit; (205) Power generation amount available service selection unit; (206) High-capacity battery capacity and purpose selection unit; (207) High-capacity battery charge and discharge collection calculation unit; (208) Wind power generator power generation measurement unit; (209) Charge and discharge rate operation range limit unit; (210) Protection element and alarm information measurement unit; (211) High-capacity battery malfunction detection unit; (212) Facility utilization rate calculation unit; (213) Maximum lifetime calculation unit

Description

BATTERY ENERGY STORAGE SYSTEM AND MANAGEMENT METHOD THEREOF}

The present invention relates to a battery energy storage system and a method of operating the same, and more particularly, to battery energy storage for performing economic management (Efficiency Management) of a large capacity battery (Battery Energy Storage System) for a wind farm It relates to a system and its operation method.

With the introduction of the concept of the Smart Grid, a nationwide intelligent grid, the spread of renewable energy such as wind and solar power is gradually spreading due to the lack of resources and environmental pollution caused by the use of fossil fuels. have.

That is, wind power generators, solar power, and the like, which are renewable energy generation sources, have recently been widely used all over the world due to the lack of existing fossil fuel resources and environmental pollution. However, since these renewable energy sources change rapidly according to climatic conditions, when operated in conjunction with the existing grid, it will act as a source of instability. Therefore, a systematic plan for managing these uncontrollable sources is required. Was done.

In order to efficiently and economically manage the power system, a new concept of smart grid and smart renewal has been introduced.

Many countries around the world continue to expand their renewable energy generation sources. However, since these power generation sources vary greatly depending on weather conditions, research and development on the way to supply electricity to the grid is being actively conducted.

For this research, various pilot projects are connected to renewable energy generation sources and large-capacity batteries to compensate for irregular renewable energy generation sources.

On the other hand, Korean Patent No. 10-1135284 adopts a renewable power source and a distributed power source that can temporarily store power from the energy source and a charging device for stabilizing the power system through such a system, and provides a reactive power control function. Disclosed is a multi-function power conversion apparatus and method comprising: a power conversion apparatus including a reactive power control function, comprising: an alternative power input unit receiving alternative power from at least one auxiliary power supply; A power conversion switching unit converting electricity input from the alternative power input unit into alternating current; A charging power supply unit connected to the alternative power input unit and storing electricity supplied from at least one of the alternative power input unit and a grid through the power conversion switching unit; And receiving power factor information, active power, and reactive power demand from the grid connected to the consumption load through communication, and outputting the power factor switching switch to meet the power factor information, active power, and free power requirements received from the grid. And a power controller for controlling a voltage, a current, and a phase angle between the voltage and the current. According to the disclosed technology, the power supply of the power system can be stably maintained through the alternative power source, and the power of the power system can be efficiently operated.

However, a large capacity battery linked to renewable energy is expensive, and has a characteristic in that the lifetime depends on the number of charge and discharge cycles. Therefore, there is a need for a charging / discharging technique for extending the life of a large-capacity battery and an economic operation method for selling electricity, but there have been no cases of developing a system using the technique.

In other words, the renewable energy cannot be stably supplied with electric power because variations in the amount of power generated vary depending on natural conditions. In order to overcome this drawback, it is essential to apply a large capacity battery that can compensate for the unstable renewable energy output and stably supply power to the system.

Korea Patent Registration No. 10-1135284

One embodiment of the present invention is to stabilize the irregular power generation of the wind farm (Battery Energy Storage System) through the optimal operation in consideration of the economic efficiency of battery energy storage that can maximize the life of the large capacity battery To provide a system and its operation method.

Among the embodiments, the battery energy storage system may include: an information collector configured to collect information of a plurality of large capacity batteries and a plurality of wind generators installed in the wind farm and collect weather information of the wind farm; A wind power generation amount prediction unit for deriving a predicted generation amount of wind speed by using weather information collected by the information collecting unit; A large-capacity battery charge / discharge schedule establishing unit for establishing a charge / discharge schedule according to the predicted generation amount derived from the wind power generation predictor; A large-capacity battery operable range calculator for calculating a charge / discharge available range of the large-capacity battery according to the charge-discharge rate operating range information of the large-capacity battery collected by the information collecting unit; A generation amount available service selection unit for selecting a generation amount available service type using information of the large capacity battery and the wind generator collected by the information collecting unit; A large capacity battery capacity and usage selection unit for deriving capacity design and usage selection of the large capacity battery according to the operational range calculated by the large capacity battery operation range calculation unit and the type of power generation available service selected by the power generation available service selection unit; A large capacity battery charge and discharge counting unit that counts the charge and discharge count of the large capacity battery; Wind generator power generation measuring unit for measuring the power generation of the wind generator; A charge / discharge rate operation area limiting unit configured to limit the charge / discharge rate operation area of the large-capacity battery according to the number of charge / discharge counted by the large-capacity battery charge / discharge recovery unit and the amount of power measured by the wind turbine generator; Relay element and alarm information measuring unit for measuring the relay element and the alarm information of the large-capacity battery and the wind generator; A large-capacity battery abnormality measurement unit for measuring the abnormality of each bank of the large-capacity battery; A facility utilization calculation unit configured to calculate a facility utilization rate according to the relay element and alarm information measured by the relay element and alarm information measuring unit and the abnormality of each bank measured by the large capacity battery abnormality measuring unit; And a charge / discharge schedule established by the large-capacity battery charge / discharge schedule establishment unit, a capacity design and use selection derived from the large-capacity battery capacity and use selection unit, a charge / discharge rate operation region limited by the charge / discharge rate operation region limiter, and the It includes a maximum life derivation unit for deriving the maximum life of the large-capacity battery for each purpose according to the facility utilization calculated by the facility utilization calculation unit.

In one embodiment, the large-capacity battery charge-discharge schedule establishing unit may establish a charge-discharge schedule within the charge-discharge available range of the large-capacity battery calculated by the large-capacity battery operation range calculation unit.

In one embodiment, the large-capacity battery charge / discharge recovery calculator may apply the charge-discharge count of the large-capacity battery to the charge / discharge rate operation region limiting unit in consideration of the current charge / discharge rate and the past charge-discharge count of the large-capacity battery.

Among the embodiments, a method of operating a battery energy storage system may include collecting information of a plurality of large capacity batteries and a plurality of wind generators installed in a wind farm, and collecting weather information of the wind farm; Deriving a predicted generation amount of wind speed by using the collected weather information and establishing a charge / discharge schedule of a large capacity battery according to the predicted generation amount; Calculating a charge / discharge available range of the large capacity battery according to the collected charge / discharge rate operating range information of the large capacity battery; Selecting a type of power generation available service using the collected large capacity battery and the wind generator information; Deriving capacity design and usage selection of a large capacity battery according to the calculated operable range and the selected power generation available service type; Counting the number of charge / discharge cycles of the large-capacity battery and measuring the amount of power generated by the wind generator; Limiting a charge / discharge rate operation region of a large capacity battery according to the counted number of charge / discharge cycles and the measured power generation amount; Measuring relay element and alarm information of the large capacity battery and the wind generator, and whether there is an abnormality for each bank of the large capacity battery; Calculating a facility utilization rate according to the measured relay element and alarm information and abnormality of each bank; And deriving a maximum lifespan of a large capacity battery for each application according to the established charge / discharge schedule, the derived capacity design and use selection, the limited charge / discharge rate operation region, and the calculated facility utilization rate.

Battery energy storage system and its operation method according to an embodiment of the present invention, by applying a large-capacity storage device to the wind farm to ensure the instability of the system due to the irregular wind power generation with a stable output, considering the economical efficiency of large capacity batteries By applying the efficient management function, it can contribute to increase the profitability of power generation companies by maximizing the life of large capacity battery, and suggest the best way in selecting and designing the capacity of large capacity battery applied to wind farm. It can also contribute to the effect.

1 is a block diagram illustrating a wind farm with a battery energy storage system according to an embodiment of the present invention.
2 is a block diagram illustrating a battery energy storage system according to an embodiment of the present invention.
3 is a flowchart illustrating a method of operating a battery energy storage system according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

1 is a block diagram illustrating a wind farm with a battery energy storage system according to an embodiment of the present invention.

The wind farm 100 is basically configured as shown in FIG. 1. As illustrated in FIG. 1, the wind farm 100 includes a large capacity battery 111 and 112 selected according to the power generation capacity of the wind farm 100, and a plurality of wind generators 121 and 122 having various capacities. 123, and a plurality of power converters 131 to 135.

At this time, since the large-capacity batteries 111 and 112 are composed of a plurality of charge and discharge banks (Bank), the utilization rate of the facility depends on the failure of each bank.

All the large capacity batteries 111 and 112 and the wind generators 121, 122, and 123 are installed and operated in parallel with a power conversion system (PCS) 131 to 135.

Power converters (131 to 135) is a device for converting AC into direct current or direct current into alternating current, and has a relay function that can stop the power supply according to the abnormality of the power system, such information and the wind generator 121 , 122, 123) provides the alarm information to know whether there is an error.

2 is a block diagram illustrating a battery energy storage system according to an embodiment of the present invention.

Referring to FIG. 2, the battery energy storage system 200 may include an information collector 201, a wind power generation amount prediction unit 202, a large capacity battery charge and discharge scheduler 203, and a large capacity battery operation. Possible range calculation unit 204, power generation available service selection unit 205, large-capacity battery capacity and use selection unit 206, large-capacity battery charge and discharge recovery calculation unit 207, wind power generator generation amount measurement unit 208, charge and discharge rate Wind power generation including an operation area limiting unit 209, relay element and alarm information measuring unit 210, large capacity battery abnormality measuring unit 211, facility utilization calculation unit 212, maximum lifespan derivation unit 213 By installing a large capacity battery in the complex 100 to stably supply power for irregular wind power generation, and also to ensure the maximum life of the large capacity battery.

The information collecting unit 201 collects information of the large capacity batteries 111 and 112 and the wind generators 121, 122, and 123 installed in the wind farm 100 as shown in FIG. 1 in real time, and the weather sensor. The weather information (for example, wind direction, wind speed, air temperature, humidity, etc.) of the wind farm 100 is measured and collected in real time, and the collected weather information is measured by the wind power generation predictor 202. And input the collected large capacity batteries 111 and 112 and the wind generators 121, 122 and 123 to the power generation available service selection unit 205.

The wind power generation amount prediction unit 202 derives a predicted generation amount of wind power (ie, wind speed) by using previously collected weather information provided from the information collection unit 201, and calculates the estimated generation amount of the derived wind speed by using a large capacity battery. Input to charge and discharge schedule establishment unit 203. Here, the predicted generation amount is to be predicted through the information on the generation amount of the wind generator (121, 122, 123) according to the wind speed set in the memory.

The large-capacity battery charge / discharge schedule establishing unit 203 establishes an optimal charge / discharge schedule of the large-capacity batteries 111 and 112 according to the weather information measured by the information collection unit 201, and the established large-capacity batteries 111 and 112. ) Is input to the maximum life derivation unit 213. At this time, the large-capacity battery charge-discharge scheduler 203 is a method for minimizing the reduction of life in the charge-discharge-available range of the large-capacity batteries 111 and 112 calculated by the large-capacity battery operation range calculator 204, and predicts the amount of wind power generation. Charge / discharge schedule is established according to the predicted generation amount of wind speed derived from the unit 202. Here, the charge and discharge schedule is to be established through the information on the charge and discharge schedule according to the predicted generation amount of the wind speed previously set in the memory.

The large-capacity battery operable range calculation unit 204 is the charge and discharge rate of the large-capacity battery (111, 112) applied to the wind farm 100 among the information of the large-capacity battery (111, 112) collected by the information collection unit 201 ( According to the operating range of the SOC (or charge / discharge state), the operable range (ie, charge / discharge available range) of the large capacity batteries 111 and 112 is calculated, and the calculated large capacity batteries 111 and 112 can be operated. The range is input to the large capacity battery capacity and use selection unit 206. Here, the operable range of the large capacity battery (111, 112) for the charge and discharge available range of the large capacity battery (111, 112) according to the charge and discharge rate (SOC) operating range of the large capacity battery (111, 112) previously set in the memory. Information can be determined.

The generation amount available service selection unit 205 selects a type of generation amount available service using information of the large capacity batteries 111 and 112 and the wind generators 121, 122, and 123 collected by the information collection unit 201, and selects the corresponding generation. The type of power generation available service is input to the large capacity battery capacity and use selection unit 206. Here, the power generation available service is a variety of power generation service type (for example, when performing a power generation business using the large-capacity batteries 111, 112 and wind generators 121, 122, 123 installed in the wind farm 100, Demand reduction, demand generation, etc.), and may be determined based on the type of power generation service according to the large capacity batteries 111 and 112 and the wind power generators 121, 122, and 123 that are preset in the memory.

The large-capacity battery capacity and use selection unit 206 is a power generation available service selected by the large-capacity battery operation range calculation unit 204 and the operational range and power generation available service selection unit 205 of the large-capacity batteries 111 and 112 calculated. Design the capacity of the large capacity batteries 111 and 112 according to the power generation usage and derive the use selection, and the capacity design and use of the large capacity batteries 111 and 112 according to the derived generation usage. Input to the derivation unit 213. Here, the capacity design and use of the large capacity batteries 111 and 112 may be selected by the capacity design of the large capacity batteries 111 and 112 according to the operational ranges and power generation available service types of the large capacity batteries 111 and 112 preset in the memory. And information on the use selection.

The large-capacity battery charge / discharge recovery unit 207 counts the number of charge / discharge cycles of the large-capacity batteries 111 and 112, and charges / discharges the operation area limiter 209 to count the number of charges and discharges of the counted large-capacity batteries 111 and 112. Applies to Here, since the number of charge / discharge cycles of the large-capacity batteries 111 and 112 is related to the lifespan of the large-capacity batteries 111 and 112, the current charge / discharge rate (SOC) of the large-capacity batteries 111 and 112 and the number of charge / discharge cycles of the past are taken into consideration. To apply.

The wind generator power generation unit 208 measures the power generation of the wind power generators 121, 122, and 123, and inputs the measured power generation amount of the wind power generators 121, 122, and 123 to the charge / discharge rate operation region limiting unit 209. do. Here, the power generation amount of the wind power generators 121, 122, 123 is used to distribute the charge amount for each of the large capacity batteries 111, 112.

The charge / discharge rate operation region limiting unit 209 is a wind generator measured by the number of charge and discharge of each of the large-capacity batteries 111 and 112 applied by the large-capacity battery charge-discharge counting unit 207 and the wind generator power generation measurement unit 208. Receives the power generation amount of the 121, 122, 123, limits the charge and discharge rate operation area of each of the large capacity battery (111, 112), the maximum charge and discharge rate operation area of each of the limited capacity of the large capacity battery (111, 112) Input to the derivation unit 213. Here, the charge / discharge rate operation area limitation of each of the large capacity batteries 111 and 112 is a large capacity battery according to the number of charge / discharge cycles of the large capacity batteries 111 and 112 and the amount of electricity generated by the wind generators 121, 122 and 123. The charge / discharge rate of the regions 111 and 112 may be determined based on information on the limitation of the operation region.

The relay element and alarm information measuring unit 210 measures relay element and alarm information of the large capacity batteries 111 and 112 and the wind power generators 121, 122 and 123, and the measured large capacity batteries 111 and 112 and the wind power. The relay element and alarm information of the generators 121, 122, 123 are input to the facility utilization calculation unit 212.

Large-capacity battery abnormality measurement unit 211 measures the abnormality of each bank (Bank) of the large-capacity battery (111, 112), the facility utilization rate of the abnormality of each bank (Bank) of the measured large-capacity battery (111, 112) Input to the calculator 212.

The facility utilization calculation unit 212 measures the relay element and alarm information of the large capacity batteries 111 and 112 and the wind power generators 121, 122, and 123 measured by the relay element and alarm information measuring unit 210 and whether there is a problem with the large capacity battery. Receives the abnormality of each of the banks of the large-capacity battery (111, 112) measured in the unit 211, calculates the utilization rate of the facility through the received preventive diagnosis, and calculates the maximum utilization life of the facility utilization rate through the calculated preventive diagnosis Enter (213). Here, the facility utilization rate is the facility utilization rate set in the memory according to the relay element and alarm information of the large capacity batteries 111 and 112 and the wind generators 121, 122 and 123 and the abnormality of each bank of the large capacity batteries 111 and 112. It can be calculated through

The maximum life derivation unit 213 is used for the optimal charge / discharge schedule of the large capacity batteries 111 and 112 established by the large capacity battery charge / discharge schedule establishment unit 203, the large capacity battery capacity, and the power generation amount derived from the use selection unit 206. In accordance with the capacity design and use of the large capacity batteries 111 and 112, the charge and discharge rate operation region of each of the large capacity batteries 111 and 112 limited by the charge and discharge rate operation region limiting unit 209, and the facility utilization rate calculation unit 212. By receiving information on the utilization rate of the facility through the calculated preventive diagnosis, the maximum lifespan of the large-capacity batteries 111 and 112 for each purpose is derived by using the received information. Here, the maximum life of the large-capacity battery (111, 112) for each use is the optimal charging and discharging schedule of the large-capacity battery (111, 112), the capacity design and selection of the capacity of the large-capacity battery (111, 112) according to the power generation use, each large-capacity battery ( It can be derived through the information on the maximum life of the large-capacity battery 111, 112 for each purpose set in the memory according to the charge and discharge rate operation region of the 111, 112, and the facility utilization rate through the preventive diagnosis.

In this case, the uses of the large capacity batteries 111 and 112 may be variously classified according to characteristics of a service to be applied. In addition, the large capacity batteries 111 and 112 having a high charge and discharge rate may be used to compensate for the instantaneous output fluctuations of the wind generators 121, 122 and 123. In the case of the batteries 111 and 112 having a large capacity rather than the fast rate of charge and discharge rate, the constant output may be supplied for a long time and thus may be used for a constant output.

Battery energy storage system according to an embodiment of the present invention having the configuration as described above, is installed in connection with the large-capacity battery (111, 112) of Figure 1, and also the wind generators 121, 122, 123 of Figure 1 It is operated in conjunction with, and performs capacity design and usage selection of large capacity batteries 111 and 112 for constant energy output control and correction of instantaneous output power error, and restricts the operation area according to SOC. To establish an optimized charge and discharge schedule of the large-capacity battery (111, 112) using the weather information, to increase the facility utilization rate through the preventive diagnostic function, thereby extending the life of the large-capacity battery (111, 112).

3 is a flowchart illustrating a method of operating a battery energy storage system according to an embodiment of the present invention.

Referring to FIG. 3, first, the information collecting unit 201 collects information of the large capacity batteries 111 and 112 and the wind generators 121, 122, and 123 installed in the wind farm 100 in real time ( S301), for example, by measuring the weather information of the wind farm 100 in real time using a weather sensor that can detect the wind direction, wind speed, air temperature, humidity and the like (S302), the collected Provides the information of the large-capacity battery (111, 112) and the wind generator (121, 122, 123) to the power generation available service selection unit 205, and also provides the measured and collected weather information to the wind power generation unit (202). .

Accordingly, the wind power generation amount prediction unit 202 receives the weather information measured and collected by the information collecting unit 201 and stores it in a memory, and then estimates the generation amount of wind power (ie, wind speed) by using the previous weather information stored in the memory. At this time, through the information on the power generation amount of the wind generator (121, 122, 123) according to the wind speed set in the memory to predict the predicted power generation of the wind speed (S303), the estimated power generation of the predicted wind speed Provides a large capacity battery charge and discharge scheduler 203.

Accordingly, the large-capacity battery charge / discharge schedule establishing unit 203 establishes an optimal charge / discharge schedule according to the predicted generation amount of wind speed provided from the large-capacity battery operable range calculation unit 204. The charge / discharge schedule is established through the information on the optimal charge / discharge schedule according to the predicted generation amount (S304), and the charge / discharge schedule of the corresponding large capacity batteries 111 and 112 is provided to the maximum life derivation unit 213. .

In the large-capacity battery operable range calculation unit 204, the charging of the large-capacity batteries 111 and 112 applied to the wind farm 100 using the information of the large-capacity batteries 111 and 112 collected in step S301 described above. The operating range (ie, charge / discharge available range) of the large capacity batteries 111 and 112 is calculated according to the operating range of the discharge rate SOC (or charge / discharge state). The charge / discharge available range of the large-capacity batteries 111 and 112 is calculated based on information on the charge / discharge available range of the large-capacity batteries 111 and 112 according to the SOC operating range of 112 (S305). The calculated operational range of the large capacity batteries 111 and 112 is provided to the large capacity battery capacity and use selection unit 206.

In addition, the power generation available service selection unit 205 selects the type of power generation available service using information of the large capacity batteries 111 and 112 and the wind generators 121, 122 and 123 collected by the information collection unit 201. At this time, through the information on the power generation service type according to the large-capacity batteries (111, 112) and wind generators (121, 122, 123) previously set in the memory to select the power generation available service type (S306), the selected power generation available The service type is provided to the large-capacity battery capacity and use selection unit 206.

Accordingly, the large capacity battery capacity and use selection unit 206 receives the operational range of the large capacity batteries 111 and 112 calculated in the above-described step S305 and the type of power generation available service selected in the above-described step S306, and applies the generated amount to the usage amount. Design the capacity of the large-capacity battery (111, 112) according to the purpose and derive the use selection, at this time, the large-capacity battery (111, 112) according to the operation range and power generation available service types of the large-capacity battery (111, 112) pre-set in the memory The capacity design and usage selection of the large capacity batteries 111 and 112 can be determined through the information on the capacity design and usage selection of the battery (S307). Provided to the derivation unit (213).

The large-capacity battery charge / discharge recovery unit 207 counts the charge / discharge counts of the large-capacity batteries 111 and 112 (S308) and restricts the charge / discharge count of the counted large-capacity batteries 111 and 112. Applicable to the unit 209, and also the wind generator power generation unit 208 measures the power generation of the wind generators 121, 122, 123 (S309), the measured wind generators 121, 122, 123 of The amount of power generated is provided to the charge / discharge rate operation region limiting unit 209.

Accordingly, the charge / discharge rate operation region limiting unit 209 is the number of charge and discharge of each of the large-capacity battery (111, 112) applied in step S308 described above and the amount of power generation of the wind power generators 121, 122, 123 measured in step S309 described above. To limit the charge / discharge rate operation area of each of the large-capacity battery (111, 112) by using, wherein the number of charge and discharge of the large-capacity battery (111, 112) previously set in the memory and the amount of generation of the wind generator (121, 122, 123) Through the information on the charge / discharge rate operation area limitation of the large capacity batteries 111 and 112, the charge / discharge rate operation area limitation of the large capacity batteries 111 and 112 may be determined (S310), and each of the determined large capacity batteries 111, The charge / discharge rate operation region limitation of 112 is provided to the maximum lifetime derivation unit 213.

The relay element and alarm information measuring unit 210 measures relay element and alarm information of the large capacity batteries 111 and 112 and the wind power generators 121, 122 and 123 (S311), and the measured large capacity battery 111, 112 and the relay element and the alarm information of the wind generator (121, 122, 123) provides the facility utilization rate calculation unit 212, and the large capacity battery abnormality measurement unit 211 is a bank of large capacity batteries (111, 112) The abnormality of each bank is measured (S312), and the abnormality of each bank of the measured large capacity batteries 111 and 112 is provided to the facility utilization calculation unit 212.

Thus, the facility utilization calculation unit 212 is the relay element and the alarm information of the large-capacity battery (111, 112) and wind power generators (121, 122, 123) measured in the above-described step S311 and the large-capacity battery measured in the above-described step S312 Calculate facility utilization rate by preventive diagnosis using abnormality of each bank of (111, 112), wherein relay element and alarm information of large capacity battery (111, 112) and wind generator (121, 122, 123) and large capacity battery According to the abnormality of each bank of 111 and 112, the utilization rate of the facility may be calculated through the preset facility utilization rate in the memory (S313), and the calculated facility utilization rate is provided to the maximum lifetime derivation unit 213.

Then, the maximum lifetime derivation unit 213 design the capacity of the large capacity batteries 111 and 112 according to the optimum charge and discharge schedule of the large capacity batteries 111 and 112 established in the above-described step S304 and the amount of power generation determined in the above-described step S307. And the usage selection, the charge / discharge rate operation region of each of the large capacity batteries 111 and 112 determined in the above-described step S310, and the information on the facility utilization rate calculated in the above-described step S313 to determine the use of the large capacity batteries 111 and 112 of the respective applications. To derive the maximum life, at this time, the optimum charge and discharge schedule of the large capacity battery (111, 112), the capacity design and use of the large capacity battery (111, 112) according to the power generation purpose, the charge and discharge rate of each large capacity battery (111, 112) The maximum capacity of the large-capacity batteries 111 and 112 by use is determined through information on the maximum lifespan of the large-capacity batteries 111 and 112 for each use set in the memory according to the operation area and the facility utilization rate through the preventive diagnosis. You can obtain the name (S314).

In this case, the uses of the large capacity batteries 111 and 112 may be variously classified according to characteristics of a service to be applied. In addition, the large capacity batteries 111 and 112 having a high charge and discharge rate may be used to compensate for the instantaneous output fluctuations of the wind generators 121, 122 and 123. In the case of the batteries 111 and 112 having a large capacity rather than the fast rate of charge and discharge rate, the constant output may be supplied for a long time and thus may be used for a constant output. That is, it is possible to maximize the lifespan according to the use of the large-capacity battery (111, 112) through the operation performed from the above step S301 to S313.

In the operating method of the battery energy storage system according to an embodiment of the present invention having an operation process as described above, by applying the battery energy storage system 200 to the wind farm 100, the instability of the system due to irregular wind power generation To ensure a stable output and to maximize the life of the large-capacity battery (111, 112). That is, by applying an efficient management function considering economics to the large-capacity battery (111, 112), by maximizing the life of the large-capacity battery (111, 112) can improve the profitability of the power generators, wind farm 100 The present invention can contribute to economic effects by suggesting an optimal method in selecting and designing the capacity of the large-capacity batteries 111 and 112 to be applied.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention as defined by the following claims It can be understood that

100: wind farm
111, 112: large capacity batteries
131 to 135: power converter (PCS)
200: battery energy storage system
201: information collector
202: wind power generation unit
203: charging / discharging schedule establishment unit of large capacity battery
204: large battery operation range calculation unit
205: power generation available service selection unit
206: large capacity battery capacity and use selection unit
207: large-capacity battery charge / discharge recovery unit
208: wind power generation unit
209: charge and discharge rate operation area limitation
210: relay element and alarm information measuring unit
211: large capacity battery abnormality measurement unit
212: facility utilization calculation unit
213: maximum lifetime derivation

Claims (4)

An information collector configured to collect information of a plurality of large capacity batteries and a plurality of wind generators installed in the wind farm and collect weather information of the wind farm;
A wind power generation amount prediction unit for deriving a predicted generation amount of wind speed by using weather information collected by the information collecting unit;
A large-capacity battery charge / discharge schedule establishing unit for establishing a charge / discharge schedule according to the predicted generation amount derived from the wind power generation predictor;
A large-capacity battery operable range calculator for calculating a charge / discharge available range of the large-capacity battery according to the charge-discharge rate operating range information of the large-capacity battery collected by the information collecting unit;
A generation amount available service selection unit for selecting a generation amount available service type using information of the large capacity battery and the wind generator collected by the information collecting unit;
A large capacity battery capacity and usage selection unit for deriving capacity design and usage selection of the large capacity battery according to the operational range calculated by the large capacity battery operation range calculation unit and the type of power generation available service selected by the power generation available service selection unit;
A large capacity battery charge and discharge counting unit that counts the charge and discharge count of the large capacity battery;
Wind generator power generation measuring unit for measuring the power generation of the wind generator;
A charge / discharge rate operation area limiting unit configured to limit the charge / discharge rate operation area of the large-capacity battery according to the number of charge / discharge counted by the large-capacity battery charge / discharge recovery unit and the amount of power measured by the wind turbine generator;
Relay element and alarm information measuring unit for measuring the relay element and the alarm information of the large-capacity battery and the wind generator;
A large-capacity battery abnormality measurement unit for measuring the abnormality of each bank of the large-capacity battery;
A facility utilization calculation unit configured to calculate a facility utilization rate according to the relay element and alarm information measured by the relay element and alarm information measuring unit and the abnormality of each bank measured by the large capacity battery abnormality measuring unit; And
Charge / discharge schedule established by the large-capacity battery charge / discharge schedule establishment unit, capacity design and use selected by the large-capacity battery capacity and use selection unit, charge / discharge rate operation region limited by the charge / discharge rate operation region limiting unit, and the facility Battery energy storage system including a maximum lifespan derivation unit for deriving the maximum lifespan of a large-capacity battery for each application according to the utilization of the facility calculated by the utilization calculation unit.
The method of claim 1, wherein the large-capacity battery charge and discharge schedule establishment unit
Battery energy storage system, characterized in that for establishing a charge and discharge schedule within the charge and discharge available range of the large-capacity battery calculated by the large-capacity battery operation range calculation unit.
The method of claim 1, wherein the large-capacity battery charge and discharge counting calculation unit
The battery energy storage system of claim 1, wherein the charge / discharge count of the large-capacity battery is applied to the charge / discharge rate operating region limiting unit in consideration of the current charge / discharge rate of the large-capacity battery and the number of past charge / discharge cycles.
Collecting information of a plurality of large capacity batteries and a plurality of wind generators installed in the wind farm, and collecting weather information of the wind farm;
Deriving a predicted generation amount of wind speed by using the collected weather information and establishing a charge / discharge schedule of a large capacity battery according to the predicted generation amount;
Calculating a charge / discharge available range of the large capacity battery according to the collected charge / discharge rate operating range information of the large capacity battery;
Selecting a type of power generation available service using the collected large capacity battery and the wind generator information;
Deriving capacity design and usage selection of a large capacity battery according to the calculated operable range and the selected power generation available service type;
Counting the number of charge / discharge cycles of the large-capacity battery and measuring the amount of power generated by the wind generator;
Limiting a charge / discharge rate operation region of a large capacity battery according to the counted number of charge / discharge cycles and the measured power generation amount;
Measuring relay element and alarm information of the large capacity battery and the wind generator, and whether there is an abnormality for each bank of the large capacity battery;
Calculating a facility utilization rate according to the measured relay element and alarm information and abnormality of each bank; And
Deriving a maximum lifespan of a large-capacity battery for each application according to the established charge / discharge schedule, the derived capacity design and use selection, the limited charge / discharge rate operation region, and the calculated facility utilization rate. Operating method.

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