WO2018236027A1

WO2018236027A1 - Integrated energy storage system monitoring device

Info

Publication number: WO2018236027A1
Application number: PCT/KR2018/002639
Authority: WO
Inventors: 최소윤
Original assignee: 성훈하이텍 주식회사
Priority date: 2017-06-21
Filing date: 2018-03-06
Publication date: 2018-12-27
Also published as: KR101798554B1

Abstract

The present invention relates to an integrated energy storage system (ESS) monitoring device, which is provided in an ESS, in which a battery module, a power conversion device, and a control module therefor are integrated, so as to monitor and control an operation of each module, is applied to an ESS for receiving power from a grid power network and a new regeneration energy generation module, storing energy, and supplying the stored energy to a load or transmitting the stored energy to a system, and comprises: a battery module for receiving power from the grid power network or the new regeneration energy generation module and storing the received power; a battery management system (BMS) module for managing charging and discharging of the battery module; a power conversion device for converting an output of the battery module or an output of the new regeneration energy generation module into alternating current power and supplying the alternating current power to the load or transmitting the alternating current power to the system; a power management system (PMS) module for managing an operation of the power conversion device; and a monitoring module for controlling and monitoring a state of the ESS by communicating with the BMS module and the PMS module.

Description

Monitoring device for integrated energy storage system

The present invention relates to an integrated energy storage system monitoring apparatus for monitoring and controlling each module in an energy storage system in which a battery module and a power conversion apparatus, a BMS module for managing the same, and a PMS module are integrated.

Generally, an ESS (Energy Storage System) refers to a storage device that stores excess power generated at a power plant and temporarily delivers power when power is insufficient. A battery for storing electric energy and a device for efficiently managing the battery.

In recent years, small-scale ESS devices have been made compact and are being used in a wide range of applications such as buildings, factories, and homes for use in static electricity costs or peak power reduction, and for leisure or earthquake cost applications.

For example, Korean Patent No. 10-1229940 discloses a module management system and method for an energy storage device. This paper proposes a module management system that can monitor the remaining lifetime status of each module by communicating between the battery management system (BMS) and the module management program of the medium and large-sized energy storage device mounted on the vehicle PC . As another example, Korean Patent Registration No. 10-1433478 discloses a slave battery management system for an energy storage system in which a master BMS judges and sets the validity of an identifier (ID) using CAN communication with all slave BMSs on behalf of a user, .

However, the above conventional small-scale ESS monitoring device focuses on the management of the battery module. In actual small-scale ESS, the biggest problem occurs when the power generation amount in the renewable energy generation module is insufficient. For example, in the case of photovoltaic power generation, when the weather is blurred, a shortage of the battery module due to a shortage of electric power produced in the PV (PhotoVolatic) module occurs.

In addition, when the electric energy stored in the battery module is used in a consumer, the ESS converts the DC power to AC power by using a separately installed power conversion system (PCS: Power Conversion System). In this power conversion process, Or conduction loss may occur.

The present invention relates to a battery module and a power conversion device, a BMS module and a PMS module for managing the battery module, a power conversion device, and a PMS module integrally configured to solve the problem of low energy efficiency due to low compatibility between the battery module and the power conversion device, (BMS) module and a PMS module via a CAN (Controller Area Network) to perform real-time local monitoring and remote monitoring, while providing a user-friendly control environment. It has its purpose.

An apparatus for monitoring an integrated energy storage system according to an embodiment of the present invention includes an ESS (Energy Storage System) that receives power from a grid power network and a renewable energy generation module, stores energy, supplies stored energy to a load, A battery module which is supplied with power from the grid power grid or the renewable energy generation module and stores the received power; A BMS (Battery Management System) module for managing charging and discharging of the battery module; A power converter for converting an output of the battery module or an output of the power generation module into an AC power to supply the power to the load or to transmit power to the system; A PMS (Power Management System) module for managing the operation of the power conversion device; And a monitoring module for communicating with the BMS module and the PMS module to control and monitor the state of the ESS.

According to another aspect of the present invention, there is provided an apparatus for monitoring an integrated energy storage system, comprising: a first voltage measurement unit for measuring an output voltage of the renewable energy generation module; A second voltage measuring unit for measuring a voltage of the battery module; A first switch for connecting the grid power network and the renewable energy generation module to a charging line of the battery module; A second switch for connecting the discharge line of the battery module and the renewable energy generation module to the power conversion device; And a third switch for switching the AC power output of the power inverter to a system and a load side, wherein the monitoring module collects monitoring data from the first voltage measurement unit and the second voltage measurement unit, And the PMS module compares the output voltage of the renewable energy generation module with a predetermined reference value, and transmits the monitoring data to the PMS module through a CAN (Controller Area Network) And controls the operation of the second transfer switch by comparing the output voltage of the renewable energy generation module with the voltage of the battery module to determine the power demand of the load, And controls the operation of the switch.

In another aspect of the present invention, there is provided an apparatus for monitoring an integrated energy storage system, comprising: an overcharge prevention unit installed in a charging line of the battery module to shut off an input power of the battery module when the battery module is overcharged; And an overdischarge prevention unit installed on a discharge line of the battery module to shut off an output power of the battery module when the battery module is overdischarged, wherein the BMS module communicates with the monitoring module via the CAN, And controls the operations of the overcharge preventing section and the overdischarge preventing section based on the voltage of the battery module.

The monitoring device of the integrated energy storage system according to another embodiment of the present invention is characterized in that the monitoring module outputs the monitoring data to a screen and controls the PMS module and the BMS module through a touch user interface (TUI) And a touch screen for receiving a control command related to the operation.

The monitoring device of the integrated energy storage system according to another embodiment of the present invention is characterized in that the monitoring module transmits the monitoring data to a remote smartphone through a wide area mobile communication network and interworks with a smart phone receiving a control command from the smart phone And a control unit.

According to the monitoring device of the integrated energy storage system of the present invention, the energy storage system can be utilized for various purposes, and the configuration of the energy storage system can be unified to facilitate management of non-technical users.

1 is a block diagram illustrating an integrated energy storage system in accordance with the present invention, and Fig.

2 is a block diagram illustrating an apparatus for monitoring an integrated energy storage system according to the present invention.

Hereinafter, specific embodiments according to the present invention will be described with reference to the accompanying drawings. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Parts having similar configurations and operations throughout the specification are denoted by the same reference numerals. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.

In the following description of the embodiments, redundant descriptions and explanations of techniques obvious to those skilled in the art are omitted. Also, in the following description, when a section is referred to as " comprising " another element, it means that it may further include other elements in addition to the described element unless otherwise specifically stated.

Also, the terms "to", "to", "to", and "modules" in the specification mean units for processing at least one function or operation, and may be implemented by hardware or software or a combination of hardware and software . In addition, when a part is electrically connected to another part, it includes not only a case directly connected but also a case where the other parts are connected to each other in the middle.

Terms including ordinals, such as first, second, etc., may be used to describe various elements, but the elements are not limited to these terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the second component may be referred to as a first component, and similarly, the first component may also be referred to as a second component.

1 is a block diagram illustrating an integrated energy storage system in accordance with the present invention. As shown in the figure, an energy storage system (ESS) 200 receives power from the grid power network 110 and the renewable energy generation module 120.

The system grid 110 refers to a network associated with a KEPCO or a power supplier. Generally, the inlet line of the grid 110 includes a circuit breaker, a current transformer, a transformer, an overcurrent / overvoltage A protective relay and the like may be installed.

The renewable energy generation module 120 is a module that generates electric energy by using sunlight, wind power, geothermal energy, ocean energy, bio energy, and the like. In the illustrated example, a renewable energy generation module 120 is illustrated as a solar cell module in which a plurality of PV cells are combined.

The integrated ESS 200 according to the present invention receives power from the grid power network 110 and the renewable energy generation module 120 to store energy and supply the stored energy to the load or to the grid. A BMS (Battery Management System) module 220, a PCS (Power Conversion System) 230, a PMS (Power Management System) module 240, a switch device 250, a communication Module 260, and monitoring module 270 are integrally included in a single case.

The battery module 210 receives and stores power from the grid power network 110 or the renewable energy generation module 120. The battery module 210 may have a configuration in which a plurality of energy storage cells are combined in a serial connection and a parallel connection. In addition, when one of the energy storage cells fails, it may further include a redundancy energy storage cell that replaces the energy storage cell.

The BMS module 220 is a module for managing charging and discharging of the battery module 210. The BMS module 220 includes a rectification part for converting the commercial AC power supplied from the grid power network 110 into the DC power and a charging circuit for charging the battery module 210 with the rectified DC power. In addition, a DC-DC converter for converting the DC power supplied from the renewable energy generation module 120 into a charging voltage may be included.

The PCS 230 is an apparatus for converting the output of the battery module 210 or the output of the renewable energy generation module 120 into alternating current power and supplying it to the load or transmitting it to the system. The PMS module 240 manages the operation of the PCS 230 and controls the switching operation of the switch device 250 included in the ESS 200.

The communication module 260 includes at least a mobile communication module. The mobile communication module is connected to a base station, a relay terminal, a server, and the like, and transmits and receives radio signals through the wide area mobile communication network 300. The communication module 260 is a module for transmitting and receiving a text message, a multimedia message, and dedicated app data to and from a remote smartphone 400, and transmits and receives monitoring data and control commands, for example.

In addition, the communication module 260 may further include a short-range communication module. The short-range communication module may be composed of modules such as Bluetooth, Wi-Fi, Radio Frequency Identification (RFID), Infrared Data Association (IrDA), Ultra Wideband (UWB), and Zigbee. When the communication module 260 includes the short-range communication module, it is possible to transmit and receive the monitoring data and the control command through the short-range wireless communication without data charging when the manager's smart phone 400 approaches the communication radius.

The monitoring module 270 is a module that communicates with the BMS module 220 and the PMS module 240 to control and monitor the state of the ESS 200. Preferably, the monitoring module 270 transmits and receives data to and from the BMS module 220 and the PMS module 240 via a CAN (Controller Area Network). The monitoring module 270 communicates with the BMS module 220 and the PMS module 240 to manage and control the ESS 200 and the monitoring data and control commands to the remote smartphone 400 An embodiment in which communication is performed will be described in detail with reference to Fig.

Referring to FIG. 2, the renewable energy generation module 120 is provided with a first voltage measurement unit 122 for measuring an output voltage of the renewable energy generation module 120. The battery module 210 is provided with a second voltage measuring unit 212 for measuring the voltage of the battery module 210.

The monitoring module 270 is provided with a monitoring data collection unit 272. The monitoring data collection unit 272 collects data measured by the first voltage measurement unit 122 and the second voltage measurement unit 212, And generates data.

Switch device 250 includes a first switch 242, a second switch 244, and a third switch 246.

As shown in the figure, the first switch 242 connects the grid power network 110 and the renewable energy generation module 120 to the charging line of the battery module 210. The second switch 244 connects the discharge line of the battery module 210 and the renewable energy generation module 120 to the PCS 230. The third switch 246 switches and connects the AC power output of the PCS 230 to the system and the load side.

An overcharge prevention unit 214 is provided in the charging line of the battery module 210 to shut off the input power of the battery module 210 when the battery module 210 is overcharged. The discharge line of the battery module 210 is provided with an over discharge prevention part 216 for shutting off the output power of the battery module 210 when the battery module 210 is overdischarged.

The monitoring module 270 includes the above-described monitoring data collection unit 272, a touch screen 274, and a smartphone interlocking control unit 276.

In the above configuration, the BMS module 220 communicates with the monitoring module 270 through the CAN to receive monitoring data. And controls the operations of the overcharge prevention part 214 and the over discharge prevention part 216 based on the voltage of the battery module 210. [ For example, when the voltage of the battery module 210 exceeds a predetermined voltage, the charging of the battery module 210 is blocked to protect the energy storage cells. If the voltage of the battery module 210 reaches the lowest voltage at which the battery module 210 is completely discharged, the overdischarge prevention unit 216 is operated to stop the use of the battery module 210 so that no further discharge is caused in the battery module 210 .

The PMS module 240 receives the output voltage of the renewable energy generation module 120 from the monitoring data collection unit 272 and compares the output voltage with a predetermined reference value to control the operation of the first switch 242. If the output voltage of the renewable energy generation module 120 is equal to or greater than a predetermined reference value, the first change-over switch 242 is transferred to the renewable energy generation module 120 so that the battery module 210 are charged. If the output voltage of the renewable energy generation module 120 is below the reference value, that is, if the renewable energy generation module 120 can not produce sufficient power for charging, the first transfer switch 242 may be connected to the system The battery module 210 is switched to the power grid 110 to charge the battery module 210 with electric power provided by the electric power source (or other electric power supplier). In the ESS control environment of the present invention, unlike the conventional ESS, when the renewable energy generation power is insufficient, the charged state of the battery module 210 is maintained using the period power. Accordingly, there is an advantage that the state of the battery module 210 can be maintained at a high power level even with a small electric power charge.

The PMS module 240 compares the output voltage of the renewable energy generation module 120 with the voltage of the battery module 210 to control the operation of the second switch 244. If a sufficiently high level of power is output from the renewable energy generation module 120, the output of the renewable energy generation module 120 is connected to the PCS 230 so that the generated power is directly used for the load or is transmitted to the system . If it is determined that the output of the battery module 210 exceeds the output of the renewable energy generation module 120, the battery module 210 determines whether the output of the renewable energy generation module 120 is higher than the output of the renewable energy generation module 120, To the PCS 230. In this case, the stored power is supplied to the load or to the grid.

In addition, the PMS module 240 determines the power demand of the load and controls the operation of the third switch 246. When the power demand is generated from the load, the renewable energy generation power or the power stored in the battery module 210 is supplied to the load side. If there is no power demand from the load, surplus power is transmitted to the grid side so that an economic benefit corresponding to the power supply can be obtained.

The touch screen 274 of the monitoring module 270 outputs monitoring data to the screen and inputs a control command related to the operation of the BMS module 220 and the PMS module 240 through a touch user interface (TUI) Receive. For example, the touch screen 274 is installed to be exposed on the front surface of the case where the integrated ESS of the present invention is installed. Accordingly, the user can check and control the switching state of the switch device 250 through the intuitive control screen corresponding to the touch input, thereby enhancing the user's convenience.

The smartphone interlocking controller 276 of the monitoring module 270 transmits monitoring data to the remote smartphone 400 through the wide area mobile communication network 300 and transmits the monitoring data from the smart phone 400 to the BMS module 220 and the PMS module 300. [ Lt; RTI ID = 0.0 > 240 < / RTI > For example, when a user's control command is inputted through a dedicated application installed in the smartphone 400, the control command is received by the smartphone interlocking controller 276. The monitoring module 270 transmits the received control command to the BMS module 220 and the PMS module 240 via the CAN. That is, it is possible to control the ESS 200 in the same environment as the remote smart phone 400 through the touch screen 274 in the field.

The invention described above is susceptible to various modifications within the scope not impairing the basic idea. In other words, all of the above embodiments should be interpreted by way of example and not by way of limitation. Therefore, the scope of protection of the present invention should be determined in accordance with the appended claims rather than the above-described embodiments, and should be construed as falling within the scope of the present invention when the constituent elements defined in the appended claims are replaced by equivalents.

The present invention is applicable to new and renewable energy generation technologies such as solar power generation.

Claims

The system is applied to an ESS (Energy Storage System) that receives energy from a grid power grid and a renewable energy generation module to store energy and supply stored energy to a load or to a grid. A battery module for receiving and storing the battery module;

A BMS (Battery Management System) module for managing charging and discharging of the battery module;

A power conversion device that converts the output of the battery module or the output of the renewable energy generation module into an alternating current power and supplies the alternating current power to a load or a system;

A PMS (Power Management System) module for managing the operation of the power conversion device;

A first voltage measurement unit for measuring an output voltage of the renewable energy generation module;

A second voltage measuring unit for measuring a voltage of the battery module;

A first switch for connecting the grid power grid and the renewable energy generation module to a charging line of the battery module;

A second switch for connecting the discharge line of the battery module and the renewable energy generation module to the power conversion device;

A third switch for switching the AC power output of the power inverter to the system and the load; And

And a monitoring data collecting unit for communicating with the BMS module and the PMS module to control the state of the ESS and collecting monitoring data from the first voltage measuring unit and the second voltage measuring unit, Controller Area Network) to the PMS module

And a monitoring device for monitoring the integrated energy storage system.
The method according to claim 1,

The PMS module controls the operation of the first switch by comparing an output voltage of the renewable energy generation module with a preset reference value. When the output voltage of the renewable energy generation module is equal to or greater than a predetermined reference value, To the renewable energy generation module side to charge the battery module with renewable energy generation power and when the output voltage of the renewable energy generation module is less than a preset reference value, the first transfer switch is switched to the grid power network side And a control unit for controlling the operation of the second transfer switch by comparing the output voltage of the renewable energy generation module with the voltage of the battery module to charge the battery module with power supplied from the grid power, The output voltage The second switch is switched to the renewable energy generation module side so that the renewable energy generation power is connected to the input of the power conversion device and the output voltage of the renewable energy generation module is higher than the voltage of the battery module , The second switch is switched to the battery module side so that the electric power stored in the battery module is connected to the input of the power conversion device and the operation of the third switch is controlled by determining the power demand of the load Devices of monitoring of energy-storage systems.
The method according to claim 1,

An overcharge prevention unit installed in a charging line of the battery module to shut off the input power of the battery module when the battery module is overcharged; And

And an overdischarge prevention unit installed at a discharge line of the battery module to shut off the output power of the battery module when the battery module is overdischarged,

The BMS module communicates with the monitoring module via the CAN to receive the monitoring data and controls the operation of the overcharge prevention unit and the overdischarge prevention unit based on the voltage of the battery module. .
The method of claim 3,

Wherein the monitoring module further comprises a touch screen that outputs the monitoring data to the screen and receives a control command related to the operation of the PMS module and the BMS module through a touch user interface (TUI) Monitoring device.
5. The method of claim 4,

Wherein the monitoring module further comprises a smartphone interlocking controller that transmits the monitoring data to a remote smartphone through a wide area mobile communication network and receives a control command from the smartphone.