KR101689075B1 - Monitoring system and method for energy storage system - Google Patents

Abstract

The present invention relates to a monitoring system of an energy storage system, comprising: a battery disposed at a plurality of sites; A BMS (Battery Management System) for controlling charging and discharging of the battery and managing information about the battery; And an EMS (Energy Management System) that receives information on the battery from the BMS and compares and analyzes battery state information of each site to provide battery maintenance information.

Description

TECHNICAL FIELD [0001] The present invention relates to a monitoring system and method for an energy storage system,

The present invention relates to a monitoring system and method, and more particularly, to a monitoring system and method of an energy storage system.

An energy storage system is an energy storage device that stores excess power or irregularly produced renewable energy at a power plant and temporarily delivers power when power is low.

Specifically, an energy storage system is a system that stores electricity in an electric power system in order to supply energy to and when it is needed. In other words, it is a collection of systems that are integrated into one product, such as a conventional secondary battery.

The importance of energy storage system is emerging as an indispensable device to store unstable power generation energy in wind power generation, which is a rapidly growing new renewable energy, and supply it to the power system in a stable manner when necessary. If there is no energy storage system, unstable power supply, which depends on wind or sunlight, could cause serious problems such as a sudden shutdown of the power system. Therefore, storage is becoming a very important field in this environment, and it is being extended to home power storage systems.

These energy storage systems are installed in power generation, transmission, distribution, and customer in power system. Frequency regulation, generator output stabilization using peak energy, peak shaving, load leveling, , And emergency power supply.

Energy storage systems are divided into physical energy storage and chemical energy storage depending on the storage method. Physical energy storage includes pumped storage, compressed air storage, and flywheel. Chemical storage includes lithium ion batteries, lead acid batteries, and Nas batteries.

On the other hand, the present energy storage system lacks information about the battery status, failure history, and life span placed at each site, so that if parts of the battery suddenly fail, the parts can not be quickly replaced, There is a problem of low predictability.

It is an object of the present invention to provide an energy storage system monitoring system and method capable of facilitating maintenance of a battery by monitoring information about a battery disposed at each site in an energy storage system.

The present invention relates to a monitoring system of an energy storage system, comprising: a battery disposed at a plurality of sites; A BMS (Battery Management System) for controlling charging and discharging of the battery and managing information about the battery; And an EMS (Energy Management System) that receives information on the battery from the BMS and compares and analyzes battery state information of each site to provide battery maintenance information.

A method of monitoring an energy storage system, the method comprising: inputting battery information to a BMS (Battery Management System) of each site; Transmitting information on the battery from the BMS to the EMS; And receiving information on the battery in the EMS and comparing and analyzing battery state information of each site to generate and provide maintenance information of the battery.

The present invention has the advantage of being able to provide an energy storage system monitoring system and method that can facilitate maintenance of a battery by monitoring information about the battery disposed at each site in the energy storage system.

1 is a block diagram of a generated power supply system according to an embodiment of the present invention.
2 is a diagram illustrating a monitoring system of an energy storage system according to the present invention.
3 is a view for explaining a method of monitoring an energy storage system according to the present invention.

Hereinafter, embodiments related to the present invention will be described in detail with reference to the drawings. The suffix "module" and " part "for the components used in the following description are given or mixed in consideration of ease of specification, and do not have their own meaning or role.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The following terms are defined in consideration of the functions in the embodiments of the present invention, which may vary depending on the intention of the user, the intention or the custom of the operator. Therefore, the definition should be based on the contents throughout this specification.

Combinations of the steps of each block and flowchart in the accompanying drawings may be performed by computer program instructions. These computer program instructions may be embedded in a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus so that the instructions, which may be executed by a processor of a computer or other programmable data processing apparatus, Thereby creating means for performing the functions described in the step. These computer program instructions may also be stored in a computer usable or computer readable memory capable of directing a computer or other programmable data processing apparatus to implement the functionality in a particular manner so that the computer usable or computer readable memory It is also possible to produce manufacturing items that contain instruction means that perform the functions described in each block or flowchart illustration in each step of the drawings. Computer program instructions may also be stored on a computer or other programmable data processing equipment so that a series of operating steps may be performed on a computer or other programmable data processing equipment to create a computer- It is also possible for the instructions to perform the processing equipment to provide steps for executing the functions described in each block and flowchart of the drawings.

Also, each block or each step may represent a module, segment, or portion of code that includes one or more executable instructions for executing the specified logical function (s). It should also be noted that in some alternative embodiments, the functions mentioned in the blocks or steps may occur out of order. For example, two blocks or steps shown in succession may in fact be performed substantially concurrently, or the blocks or steps may sometimes be performed in reverse order according to the corresponding function.

1 is a block diagram of a generated power supply system according to an embodiment of the present invention.

The power supply system 100 according to an embodiment of the present invention includes a power generation apparatus 101, a DC / AC converter 103, an AC filter 105, an AC / AC converter 107, a system 109, A battery energy storage system 113, a system control unit 115, a load 117, and a DC / DC converter 121. [

The power generation apparatus 101 produces electrical energy. When the power generation apparatus is a solar power generation apparatus, the power generation apparatus 101 may be a solar cell array. A solar cell array is a combination of a plurality of solar cell modules. The solar cell module is a device for generating a predetermined voltage and current by converting solar energy into electric energy by connecting a plurality of solar cells in series or in parallel. Thus, a solar cell array absorbs solar energy and converts it into electric energy. When the power generation system is a wind power generation system, the power generation apparatus 101 may be a fan that converts wind energy into electric energy. However, as described above, the power supply system 100 can supply power only through the battery energy storage system 113 without the power generation apparatus 101. [ In this case, the power supply system 100 may not include the power generation apparatus 101.

The DC / AC converter 103 converts the DC power to AC power. Converts the DC power supplied from the power generation apparatus 101 or the DC power discharged from the battery energy storage system 113 into AC power.

The AC filter 105 filters the noise of the power converted into AC power. In a specific embodiment, the AC filter 105 may be omitted.

The AC / AC converter 107 converts the magnitude of the voltage of the filtered AC power so that the AC power can be supplied to the system 109 or the load 117 to supply power to the system 109 or the independent load. According to a specific embodiment, the AC / AC converter 107 may be omitted.

The system 109 is a system in which many power plants, substations, transmission / distribution lines, and loads are integrated to generate and utilize electric power.

The load 117 receives electric energy from the power generation system and consumes electric power. The battery energy storage system 113 charges and receives electrical energy from the power generation device 101 and discharges the charged electrical energy according to the power supply status of the system 109 or the load 117. [ Specifically, when the system (109) or the load (117) is light, the battery energy storage system (113) receives and supplies the idle power from the power generation apparatus (101). When the system 109 or the load 117 is overloaded, the battery energy storage system 113 discharges the charged power to supply power to the system 109 or the load 117. The power supply / demand situation of the system 109 or the load 117 may have a large difference by time. Therefore, it is inefficient that the power supply system 100 uniformly supplies the power supplied by the power generation apparatus 101 without considering the power supply / demand situation of the system 109 or the load 117. Therefore, the power supply system 100 uses the battery energy storage system 113 to adjust the amount of power supply according to the power supply situation of the system 109 or the load 117. [ Whereby the power supply system 100 can efficiently supply power to the system 109 or the load 117. [

The DC / DC converter 121 converts the magnitude of the DC power supplied or supplied by the battery energy storage system 113. The DC / DC converter 121 may be omitted depending on the specific embodiment.

The system control unit 115 controls the operation of the DC / AC converter 103 and the AC / AC converter 107. The system control unit 115 may include a charge control unit 111 for controlling charging and discharging of the battery energy storage system 113. The charge control unit 111 controls charging and discharging of the battery energy storage system 113. When the system 109 or the load 117 is overloaded, the charge control unit 111 controls the battery energy storage system 113 to supply power to the system 109 or the load 117. [ When the system 109 or the load 117 is light load, the charge control unit 111 controls the external power supply or the power generation apparatus 101 to supply power to the battery energy storage system 113.

The battery energy storage system 113 controls the charging and discharging of the battery and the battery, informs and manages the charging state, the battery information and the like through the external interface, and controls the BMS Battery Management System). The battery energy storage system 113 may be disposed at a plurality of sites.

The DC / DC converter 121, the DC / AC converter 103, and the AC / AC converter 107 may be included in the power conversion system, and the power conversion system may convert the voltage and frequency characteristics of the electric energy Or a power conditioning system (PCS).

The charge control unit 111 may include a power management system (PMS) for controlling charge and discharge of the battery energy storage system 113.

The system control unit 115 may be included in an EMS (Energy Management System).

The PMS monitors the status of the battery and the status of the PCS.

The charging / discharging of the battery is performed through the PCS. In addition, the PMS can control the PCS based on the data of the battery received from the BMS. In addition, the PMS may control the PCSs disposed in a plurality of sites according to respective efficiencies.

Meanwhile, the BMS is connected to the battery, and transmits the protection operation of the battery and the state of the battery to the system control unit 115. To protect the battery, BMS can perform overcharge protection, over-discharge protection, over-current protection, over-voltage protection, over-temperature protection and cell balancing. To this end, the BMS monitors the voltage, current, temperature, remaining power, life span, charging status, etc. of the battery and transmits the related information to the system control unit 115.

Meanwhile, the PMS monitors the state of the battery through the BMS and transmits the data to the EMS.

The EMS acquires information on the battery from the BMS disposed at each site through the PMS, monitors and compares information on the status, the failure history, and the life of the battery disposed in each site, Lt; / RTI >

Also, when the PCS is not operating, the EMS can check the operation time of parts constituting the PCS through the virtual operation so that the EMS can know the maintenance time in advance and increase the efficiency.

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

Referring to FIG. 2, a plurality of sites are provided with a battery 113a and a BMS 113b for controlling the battery 113a. The BMS 113b is connected to the PMS 111a and transmits battery status information to the PMS 111a. The battery status information may be information input to the BMS 113b by the administrator of the battery. For example, the battery status information may include information on battery status, failure history, and life span, and may include an ACB (Air Circuit Breaker) Number of times, fan life, IGBT information, and the like.

The PMS 111a transmits the battery status information to the EMS 115a.

The EMS 115a compares and analyzes the battery status information of each site and transmits information on maintenance of the battery to each PMS 113b.

That is, the EMS 115a compares and analyzes the battery status information of each site, and generates information about the expected life span of the battery, the possibility of failure, the date of component replacement, and the like, and transmits it to the BMS 113b of each site send.

Therefore, the BMS 113b of each site can predict the maintenance of the battery, and can prepare or replace a necessary part in advance. Therefore, there is an advantage that maintenance of the battery is easy.

3 is a view for explaining a method of monitoring an energy storage system according to the present invention.

Referring to FIG. 3, when the battery manager of each site inputs battery information to the BMS 113b (S100), the BMS 113b transmits battery information to the EMS 115a (S110).

The EMS 115a compares and analyzes the battery information to generate battery maintenance information (S120). The information on the maintenance of the battery includes information on battery life and failure prediction, and may include a life expectancy of the battery, a possibility of occurrence of a failure, a date on which a component is to be replaced, and the like.

The EMS 115a provides information on maintenance of the battery to the PMS 111a and the PMS 111a can provide this information to the BMS 113b.

Therefore, the BMS 113b of each site has an advantage of being able to predict the maintenance information of the battery, thereby facilitating maintenance.

The embodiments described above are not limited to the configurations and methods described above, but the embodiments may be configured by selectively combining all or a part of the embodiments so that various modifications can be made.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the present invention.

100; Power supply system, 101; Power generating device, 103; DC / AC converters, 105; AC filter, 107; AC / AC converters, 109; System, 111; A charge control section 113; Battery energy storage system, 115; A system controller 117; Load, 121; DC / DC converter

Claims (8)

1. A monitoring system for an energy storage system,
A plurality of battery management systems (BMSs) disposed in a plurality of sites for managing the batteries provided in the respective sites; And
And an EMS (Energy Management System) for controlling the plurality of BMSs,
Wherein each of the plurality of BMSs comprises:
Acquires battery state information provided to each of the plurality of sites, and transmits the battery state information to the EMS,
In the EMS,
A battery management unit configured to compare and analyze battery state information of each of the plurality of sites received from each of the plurality of BMSs to generate maintenance information on a battery included in each of the plurality of BMSs, To each of the corresponding EMSs. ≪ Desc / Clms Page number 12 > The method according to claim 1,
And a PMS (Power Management System) for receiving information on the battery from the BMS, transmitting the information to the EMS, receiving maintenance information on the battery from the EMS, and transmitting the information to the BMS. 3. The method of claim 2,
Wherein the maintenance information of the battery includes at least one of a life expectancy of the battery, a possibility of occurrence of a failure, and a scheduled replacement date of the battery. 3. The method of claim 2,
Further comprising a PCS (Power Conditioning System) for managing at least one converter,
In the EMS,
And when the PCS is not operated, confirms whether the components constituting the PCS operate. A method of monitoring an energy storage system,
Acquiring battery status information of each of the plurality of BMSs;
Each of the plurality of BMSs transmitting the obtained plurality of battery status information to an EMS (Energy Management System);
Comparing and analyzing battery state information of each of the plurality of sites received from each of the plurality of BMSs by the EMS;
The EMS generating maintenance information on a battery included in each of the plurality of BMSs based on the comparison analysis; And
And the EMS sending each of the maintenance information on the batteries contained in each of the generated plurality of BMSs to each of the corresponding EMSs. 6. The method of claim 5,
The method comprising the steps of: a PMS (Power Management System) receiving information on a battery from the BMS and transmitting the information to the EMS; and receiving the maintenance information of the battery from the EMS and transmitting the information to the BMS A method of monitoring a storage system. The method according to claim 6,
Wherein the maintenance information of the battery includes at least one of a life expectancy of the battery, a possibility of occurrence of a failure, and a scheduled date of component replacement. In the sixth aspect,
The PCS managing at least one converter; And
Further comprising the step of checking whether the components constituting the PCS operate when the EMS is not operating the PCS.

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