KR101712618B1 - A control device for battery energy storage system - Google Patents

Abstract

The present invention relates to a control device for a battery energy storage system, and more particularly to a control device for a battery energy storage system, which comprises a parameter editor for editing communication parameters and control parameters for controlling a battery energy storage system into an XML file, An XML parser for parsing the XML file stored in the XML storage unit, a control algorithm processing unit and a shared memory for providing a memory for communication with the communication unit, a communication parameter and a control parameter parsed by the XML parser, A control algorithm processing unit for calculating a charge / discharge control amount of the energy storage device using the calculated value and generating a control command according to the computed value, and an XML file parsed by the XML parser to the control algorithm processing unit through the shared memory, The algorithm processing part performs charge / discharge And the control command according to the weir, characterized in that it comprises a communication unit for transmission to the PCS, BMS, HMI, Historian SCADA and the energy storage system.
Therefore, according to the present invention, the energy storage system control device has a configuration of a control algorithm processing unit so as to be able to control according to the use scale of the energy storage system and the use purpose together with the standardized communication configuration, so that it can quickly respond to various requirements of the BESS .
In addition, even if only one energy storage system control device is used, it is possible to control according to each usage purpose and scale of use, and thus it is not necessary to provide a plurality of control systems, so that the energy storage system can be efficiently operated.

Description

Technical Field [0001] The present invention relates to a control device for a battery energy storage system,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control apparatus for a battery energy storage system, and more particularly to a control apparatus for a battery energy storage system.

The sudden increase in electric power demand causes disturbance of the power system, causing problems of power quality and accordingly, expansion of transmission and distribution facilities is required. As an alternative to such facility expansion, BESS (Battery Energy Storage System) using a battery is emerging for efficient utilization of renewable energy such as solar light and wind power.

The energy storage device can be used in various ways such as adjusting the main pole, reducing the peak, and stabilizing the renewed output.

BESS (Battery Energy Storage System) suitable for the technical characteristics such as power capacity and storage time for each use is being developed.

For example, the BESS (Battery Energy Storage System) for new generation power source output power compensates for the output of renewable energy sources, which are highly fluctuating, by enhancing the control capability of the renewable generators through the mass energy storage device, The BESS (Battery Energy Storage System) frequency adjustment service for the power system can provide the frequency adjustment service faster than the existing generator by using the BESS (Battery Energy Storage System) The maximum load can be reduced by using a battery energy storage system (BESS) for the peak power.

In this way, BESS (Battery Energy Storage System) can be used for various purposes, but systems currently managing BESS exist depending on the scale and purpose of power use. In the absence of such an integrated system, BESS can be used only for the intended use and scale. Therefore, there is a problem that BMS (Battery Management System) and PCS (Power Control System) can not operate BESS efficiently even though there is a standardized standard (MESA standard) according to charge / discharge capacity.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a control apparatus for an energy storage system according to the scale of use and usage of the energy storage system.

It is another object of the present invention to perform reliable energy storage system control by separating the control algorithm processing unit of the energy storage system control unit and the processing process of the communication unit from each other and independently performing transmission data to have integrity.

In order to achieve the above object, a battery energy storage system control apparatus of the present invention includes: a parameter editor for editing communication parameters and control parameters for controlling a battery energy storage system into an XML file; An XML parser for parsing an XML file stored in the XML storage unit, a control algorithm processing unit and a shared memory for providing a memory for communication with the communication unit, the communication parameters and control parameters parsed by the XML parser, A control algorithm processing unit for calculating a charge / discharge control amount of the energy storage device using the control algorithm according to the control algorithm and generating a control command according to the computed value, and an XML file parsed by the XML parser to the control algorithm processing unit through the shared memory , The control algorithm processing unit According to the charge and discharge control amount and a communication unit for transmitting the control command to the energy storage system, PCS, BMS, HMI, Historian and SCADA.

The communication unit and the control algorithm processing unit separate the communication and the control algorithm using the shared memory and process them independently of each other.

The communication parameter of the parameter editing unit may include at least one of a communication protocol for communicating with the PCS and the BMS, a communication port, and a communication speed.

Meanwhile, the control parameter of the parameter editing unit includes at least one of PCS, the required number of BMS, and the I / O address of PCS and BMS.

At this time, the parameter editing unit can perform I / O mapping for transmitting control commands to the PCS and the BMS. Meanwhile, the control algorithm processor may include at least one of a Frequency Regulation algorithm, a Demand Regulation algorithm, and a Renewable Energy algorithm for a renewable energy power storage device can do.

The energy storage system control apparatus of the present invention has a control algorithm processing unit configuration so as to be able to control according to the use scale of the energy storage system and the use purpose together with the standardized communication configuration, have.

In addition, even with a single energy storage system control device, it is possible to control according to each use purpose and scale of use, and thus it is not necessary to provide a plurality of control systems, and the energy storage system can be efficiently operated.

1 is a diagram illustrating a power system and a battery energy storage system according to an embodiment of the present invention.
2 is a block diagram of an apparatus for controlling a battery energy storage system according to an embodiment of the present invention.
FIG. 3 is a reference diagram for explaining an operation execution and a real-time operation control through a control algorithm of a control algorithm processor according to an embodiment of the present invention.
FIG. 4 is a view for illustrating a service providing method through a control device of a battery energy storage system according to an embodiment of the present invention. Referring to FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may obscure the subject matter of the present invention.

Before describing the present invention, the terms used and the meanings thereof will be summarized in connection with the present invention.

Battery Energy Storage System (BESS) is a comprehensive system that integrates management, control and control of battery, BMS (Battery Management System, PCS (Power Conditioning System), EMS etc) , And narrowly refers to a configuration of a battery and a PCS as an energy storage device.

The battery is a component that plays a role of storing electricity through PCS and discharging electricity when it is needed. BMS is a component that battery cell has maximum characteristics such as cell capacity / protection, life prediction, charge / discharge control, It is a device that can be safely used without explosion due to external impact. The PCS receives the power from the generator and stores it in the battery or converts the characteristics of the electricity to discharge it into the system. The EMS consists of the SCADA (Supervisory Control And Data Acquisition) system, which monitors the status of the battery, PCS status and control, and the ESS, which consists of a database (DB) Monitoring and controlling the system. A human machine interface (HMI) means a user equipment for controlling a power system.

On the other hand, EMS means FEMS, BEMS, HEMS, etc., and the EMS system applied to the factory is FEMS, the EMS system applied to the building is BEMS, and the EMS system applied to the home is HEMS.

Hereinafter, the present invention will be described in detail with reference to the drawings.

1 is a diagram illustrating a power system and a battery energy storage system according to an embodiment of the present invention.

2 is a block diagram of an apparatus 100 for controlling a battery battery energy storage system according to an embodiment of the present invention.

The controller of the battery energy storage system according to an embodiment of the present invention includes a parameter editing unit 110, an XML storing unit 120, an XML parser 130, a shared memory 150, a control algorithm processing unit 160, 140). A parameter editing unit 110 for editing a communication parameter and a control parameter for controlling the battery energy storage system into an XML file; an XML storing unit 120 for storing an XML file edited by the parameter editing unit 110; An XML parser 130 parsing an XML file stored in the XML storage unit 120, a shared memory 150 providing a control algorithm processing unit 160 and a shared memory 150 for communication with the communication unit 140, A control algorithm processing unit 160 for calculating a charge and discharge control amount by using the communication parameters and control parameters parsed by the XML parser 130 and a control algorithm according to a usage purpose,

The XML parser 130 transfers the XML file parsed by the XML parser 130 to the control algorithm processor 160 through the shared memory 150 and outputs the control command according to the charge / discharge control amount computed by the control algorithm processor 160 And a communication unit 140 for transferring the data to PCS, BMS, HMI, Historian, and SCADA of the energy storage system.

Since the parameter editing unit 110 according to the present invention creates parameters using XML, it is possible to edit by adding or changing XML elements.

In more detail, the communication and control parameters generated by the parameter editing unit 110 exist in a file format and can be generated in XML format for interoperability with other systems. XML is a language created by improving Hyper Text Markup Language (HTML) and is an extensibility-generating language. XML makes it easy to process complex data on the client system, makes it easy for users to create and manage, and allows easy manipulation of structured databases. Therefore, XML can freely define parameter parameters according to the usage of energy storage device to be applied, and supports many libraries and communication protocols as a standardized format. On the other hand, since XML is a text format, it has a high readability of data, high portability between platforms, and easy definition of various structures of information given logical meaning. The parameter editing unit 110 may be configured to include variable information of the object and the object according to the XML format.

The parameter editing unit 110 edits communication parameters and control parameters for controlling the battery energy storage system into an XML file.

At this time, the parameter editing unit 110 may input parameters according to the usage purpose of the energy storage device. This means communication parameters and control parameters. At this time, communication protocol, communication port, and communication speed with PCS and BMS can be set as communication parameters, and the number of PCS, BMS, PCS, BMS I / Whether event processing or time tagging can be set as a control parameter.

Meanwhile, the parameter editing unit 110 performs I / O (input / output) mapping for transmitting control commands to the PCS and the BMS. At this time, a plurality of PCSs and BMSs may exist in the energy storage device. In order to transmit a control command according to the usage purpose of the energy storage device, the parameter editing unit 110 recognizes I / O of PCS and BMS, Mapping can be performed to create a mapping table.

The XML parser 130 parses the XML file stored in the XML storage unit 120.

The XML parser 130 is an API for using the XML file in which the parameters are input in the energy storage system. At this time, various types of XML parser 130 can be used. For example, a DOM (Document Object Model) can be used and an XML file can be read into a memory and converted into a DOM object accessible.

The XML parser 130 parses the XML file in which the communication parameters and the control parameters are recorded and provides the parsed XML file to the communication unit 140. The communication unit 140 parses the XML file into the control algorithm processing unit 160 through the shared memory 150 XML objects can be passed.

The shared memory 150 provides a memory for communication to the control algorithm processing unit 160 and the communication unit 140.

When the control algorithm processing and the communication processing are integrated into one system, a different control system should be provided for each use of the energy storage device.

For example, the control patterns (e.g., charge amount, operation time) and the like are changed according to the use of each energy storage device. In such a case, a system tuning process is required every time.

At this time, the battery energy storage system is composed of PCS, BMS, HMI, Historian, etc., and this configuration does not mean that the use of the energy storage device is changed, and the system is not replaced or reconfigured with other configurations. Thus, when the configuration is maintained, the communication environment can generally be maintained.

As described above, the communication environment of the communication unit 140 does not greatly vary depending on the use purpose of the energy storage device, and a configuration capable of processing only the control algorithm is required. At this time, the communication and control algorithm can be separated using the shared memory 150.

That is, in the communication unit 140, the communication algorithm and the control parameter information required for the calculation in the control algorithm processing unit 160 are transmitted to the shared memory 150 among the data received from the lower communication end. In the control algorithm processing unit 160, The communication parameter and the control parameter information stored in the memory 150 and the control algorithm according to the use of the energy storage device.

When the control algorithm processing unit 160 completes the calculation, the control command is transmitted to the PCS and the BMS, which are subordinate components of the energy storage system. At this time, the control command is transmitted to the communication unit through the shared memory 150, It can be delivered.

On the other hand, when there is a change in the communication parameters, the control parameters, and the control command information data of the shared memory 150, an event may be generated so that the communication unit 140 and the control algorithm processing unit 160 recognize the event.

In this case, the shared memory 150 is generally characterized in that a plurality of processes can be accessed at the same time. In the present invention, however, an object (Mutual Exclusion Object) or a semaphore is used which excludes sharing among threads. This is because the reliability of the service of the power system is very important. With this configuration, it is possible to prevent the integrity of the communication parameters, the control parameters, and the control command information data from being broken.

In this manner, the communication unit 140 can process communications independently of each other while systematically transmitting data, and the control algorithm processing unit 160 can perform optimization operations. That is, only the control algorithm according to the purpose of use is changed in the control algorithm processing unit 160 while the communication unit 140 is commonly used by using the configuration of the shared memory 150, and only one control device .

The control algorithm processing unit 160 uses the communication parameters and the control parameters transferred to the control algorithm processing unit 160 through the XML parsing and sharing memory 150 to calculate the optimal charge and discharge control amount And generates a control command according to the calculated value.

At this time, the control algorithm according to the usage purpose includes a frequency regulating algorithm, a demand management algorithm (Demand Regulation algorithm), and a renewable energy algorithm (renewable energy algorithm).

The control algorithm according to the usage purpose can be designed by the engineer according to the control purpose, and various algorithms considering the type and performance of the BESS together with the use purpose may exist.

Meanwhile, the parameter editing unit 110 can be implemented in software.

The parameter editing unit 110 of the present invention may be implemented in the form of a program command that can be executed through various computer means and recorded in a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, and the like, alone or in combination. The program instructions recorded on the medium may be those specially designed and constructed for the present invention or may be available to those skilled in the art of computer software. Examples of computer-readable media include magnetic media such as hard disks, floppy disks and magnetic tape; optical media such as CD-ROMs and DVDs; magnetic media such as floppy disks; Magneto-optical media, and hardware devices specifically configured to store and execute program instructions such as ROM, RAM, flash memory, and the like. Examples of program instructions include machine language code such as those produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the present invention, and vice versa.

Meanwhile, a historian for exchanging data with the battery energy storage system control device 100 is a mass storage device for recording system state, and the system state records input / output data related to an accident history and a control data history . Output data to be recorded through communication with the controller of the energy storage system of the present invention.

At this time, the Historian may further include a function of extracting and outputting a part of data desired by the user from the recorded data. This output function enables post management.

For example, it is necessary to record the change of the frequency from the time when the system frequency falls to the stabilization point due to the drop of the generator, the time required until the system frequency is stabilized close to 60 Hz, the control record of the energy storage device used in this stabilization process Etc., it is possible to perform post-management through feedback through communication with the control device of the energy storage system.

Thus, those skilled in the art will appreciate that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the embodiments described above are to be considered in all respects only as illustrative and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

The energy storage system control apparatus of the present invention has a configuration of a control algorithm processing unit so as to be able to control according to the scale of use of the energy storage system and the use purpose together with the standardized communication configuration so that it can quickly respond to various requirements of BESS, The energy storage system control device of the present invention can be controlled according to the use purpose and the scale of use of each of the energy storage system control devices so that it is not necessary to provide a plurality of control systems and the energy storage system can be efficiently operated. It is not only the use of the related technology but also the possibility of commercialization or operation of the applied device as well as the possibility of being industrially applicable because it is practically possible to carry out the invention.

100: battery energy storage system control device
110: Control device parameter editor
120: XML storage unit
130: XML parser
140:
150: Shared memory
160: control algorithm processor

Claims (6)

A parameter editor for editing communication parameters and control parameters for controlling the battery energy storage system into an XML file;
An XML storage unit for storing an XML file edited by the parameter editing unit;
An XML parser for parsing the XML file stored in the XML storage unit;
A shared memory for providing a control algorithm processing unit and a communication unit with a memory for communication;
A control algorithm processor for calculating a charge and discharge control amount of the energy storage device using the communication parameters and control parameters parsed by the XML parser and a control algorithm according to the usage purpose and generating a control command according to the computed value; And
BMS, HMI, Historian, and the like of the energy storage system, and transmits the XML file parsed by the XML parser to the control algorithm processing unit through the shared memory. To the SCADA,
Wherein the communication unit and the control algorithm processing unit separate the communication and the control algorithm using the shared memory and process them independently of each other.
delete The method according to claim 1,
Wherein the communication parameter of the parameter editing unit includes at least one of a communication protocol for communication with the PCS and the BMS, a communication port, and a communication speed.
The method according to claim 1,
Wherein the control parameter of the parameter editing unit includes at least one of a PCS, a required number of BMSs, and an I / O address of a PCS and a BMS.
The method according to claim 1,
The parameter editing unit
Wherein the I / O mapping is performed to transfer control commands to the PCS and the BMS.
The method according to claim 1,
In the control algorithm processing section,
Wherein the control algorithm according to the use purpose includes at least one of a Frequency Regulation algorithm, a Demand Regulation algorithm for demand management, and a Renewable Energy algorithm for a renewable energy power storage device. Control device of the storage system.

Images