KR101899123B1 - Unification management system of energy storage system - Google Patents

Abstract

According to one embodiment of the present invention, a national power integration and operation system capable of providing a way to reduce power surplus of a nation comprises: at least one energy storage system storing the remaining power except for based load power and intermediate load power among the total gross power of the nation as operation reserve such as driving reserve and standby reserve and supplying power corresponding to not only a peak load section but also an actual load of facility reserve during an operation period of idle facility; and an energy storage system operation server providing ESS scheduling information for discharging power to the energy storage system in a predicted operation period after estimating the operation period and power demand of the idle facility using actual load pattern algorithm.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power management system,

The present invention relates to a national power integrated operation system for efficient operation of national power.

Recently, countries around the world are making various attempts to replace existing fossil energy resources. First of all, we are investing heavily in the renewable energy industry and the energy distribution and storage industry for energy-efficient use of natural energy. In the domestic market, In this era of trends, demand for new and renewable energy is increasing, and technologies for efficiently managing power such as smart grids have been actively researched.

The problem of using energy efficiently leads to the analysis of the demand pattern such as the place and time of the user who uses the energy, and distribution of the produced energy considering the demand pattern of the user is a key concept of the smart grid.

On the other hand, about 30% of the power facilities operated in Korea are operated by base load application, 45% by heavy load and 25% by peak load application.

In addition, the reserve capacity for stabilizing the frequency and transient voltage and securing 1.5 million kW

. The main load is the coal-fired power and the gas turbine power generation facilities for the nuclear power plant and the thermal power generation facilities for the intermediate load, and the gas turbine power generation facilities for the peak load, I can not help it. Therefore, the surplus power is charged at the lowest load time, and the peak load power is supplied using the energy storage device (ESS) to discharge at the peak load time.

In addition, the energy storage system (ESS) installed for the peak load can replace the reserve capacity of about 1.5 million kW for transient voltage and frequency stabilization and reduce the power consumption of about 20% have.

90% of this reserve is operated by standby reserve, which is only about 30 days out of 365 days a year, and is not in operation for the rest of the time and is in a standby state.

Here, among the total domestic power generation amount, the remaining power excluding the base load versus the applied power generation amount and the heavy use power generation amount is maintained and consumed as the reserve power to stably supply the power to the peak load.

By having an ESS, it is possible to reduce gas turbine generators with high power generation costs, and to eliminate wasted power while waiting for the frequency and accident reserve. And to provide a national power management system for the efficient operation of national power that can provide a way to reduce the surplus production power.

Patent Document 10-2009-0026029

The present invention stores the idle power of a low load period in an energy storage device (ESS) and discharges the stored amount of power to a peak load period to reduce the peak load, as well as the frequency fluctuation of the power load and the voltage (Idle facility) that can provide a reserve power of 1.5 million kW to cope with the fluctuation and a reserve ratio of 20% which is generated in the peak load period and which is not actually used and is wasted. And to provide a way to reduce the surplus production power of the country that is produced by the reserve power of the national power integrated operation system.

In order to solve the above problems, the national power integrated operation system according to an embodiment of the present invention stores the spare power generated from nuclear power and coal-fired power in an energy storage device (ESS) At least one energy storage system that replaces the power plant and supplies power corresponding to the actual load by means of an energy storage device (ESS); And an energy storage system operating server for providing ESS scheduling information for discharging the electric power to the energy storage system in a predicted operation period after predicting the operation period and power demand of the idle facility by using an actual load pattern algorithm, .

In one embodiment, the energy storage system management server checks real-time the amount of electric power charged based on status information of the at least one energy storage system.

In one embodiment, the energy storage system management server determines, based on the learning information that the load pattern of the base power of the base power distribution is learned, the reserve power of the idle equipment (reserve power) Power distribution scheme so as to control the discharging operation of the at least one energy storage system so that power supplied for the peak load is reduced.

In one embodiment, the energy storage system operating server includes a scheduling unit for providing the scheduling information including an operation command for charging and discharging electric power corresponding to the movable electric power of the idle equipment (reserve power).

In one embodiment, the energy storage system operating server includes a monitoring unit for monitoring at least one of a rated output, a rated capacity, a usable capacity, a charge / discharge efficiency, and a cycle life specification of each of the at least one energy storage system.

In one embodiment, the power charge amount of the at least one energy storage system is determined based on the number of idle facilities distributed in the area unit, the power consumption of the idle equipment, and the peak power of the idle equipment.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. .

The use of the national power integrated operation system according to an embodiment of the present invention enables the energy storage device to supply the peak load versus the applied power excluding the low power and the heavy load among the total gross production power of the country, It is possible to supply an electric power portion corresponding to the actual load, so that the production and consumption of surplus electric power according to the reserve ratio of idle facilities can be advantageously reduced.

In addition, the national power integrated operation system according to an embodiment of the present invention can provide the reserve power stored in the standby reserve power of the idle facility in the peak period of the low power period, so that the peak of the peak load can be maintained smoothly have.

In addition, the national power integrated operation system according to the embodiment of the present invention can arrange an energy storage system in units of a base (a nationwide area) and cope with a power network transient phenomenon between a base and a base, (Frequency fluctuation, voltage fluctuation) and power congestion in the power network in accordance with the present invention.

1 is a block diagram illustrating a national power integrated operation system according to an embodiment of the present invention.
2 is a block diagram showing the configuration of the energy storage management system shown in FIG.
3 is a block diagram showing the energy storage system operation server shown in FIG.
FIG. 4A is a graph showing the trends of the base load, the heavy load, and the peak load according to the monthly consumption pattern of the conventional total power consumption in the domestic market.
FIG. 4B is a simulation graph simulating the monthly consumption pattern of the total power in the case of applying the national power integrated operation system according to an embodiment of the present invention.
FIG. 4C is a simulation graph simulating the monthly consumption pattern of the total domestic power with the peak load reduced by the power integrated operation system when the national power integrated operation system according to the embodiment of the present invention is applied.

Hereinafter, various embodiments of the present invention will be described with reference to the accompanying drawings. It should be understood, however, that it is not intended to limit the techniques described herein to specific embodiments but to include various modifications, equivalents, and / or alternatives of the embodiments herein . In connection with the description of the drawings, like reference numerals may be used for similar components. In this specification, the expressions "having," " having, "" comprising," Quot ;, and does not exclude the presence of additional features.

As used herein, the expressions "A or B," "at least one of A and / or B," or "one or more of A and / or B," may include all possible combinations of the listed items . For example, "A or B," "at least one of A and B," or "at least one of A or B" includes (1) at least one A, (2) Or (3) at least one A and at least one B all together.

As used herein, the terms "first," "second," "first," or "second," and the like may denote various components, But is used to distinguish it from other components and does not limit the components. For example, the first user equipment and the second user equipment may represent different user equipment, regardless of order or importance. For example, without departing from the scope of the rights described herein, the first component can be named a second component, and similarly the second component can also be named a first component.

(Or functionally or communicatively) coupled with / to "another component (eg, a second component), or a component (eg, a second component) Quot; connected to ", it is to be understood that any such element may be directly connected to the other element or may be connected through another element (e.g., a third element). On the other hand, when it is mentioned that a component (e.g., a first component) is "directly connected" or "directly connected" to another component (e.g., a second component) It can be understood that there is no other component (e.g., a third component) between other components.

The phrase " configured to be used "as used herein should be interpreted according to circumstances, such as, for example, having " having the capacity to, To be designed to, "" adapted to, "" made to, "or" capable of ". The term " configured to (or set up) "may not necessarily mean" specifically designed to "in hardware. Instead, in some situations, the expression "configured to" may mean that the device can "do " with other devices or components. For example, a processor configured (or configured) to perform the phrases "A, B, and C" may be implemented by executing one or more software programs stored in a memory device or a dedicated processor (e.g., an embedded processor) , And a generic-purpose processor (e.g., a CPU or an application processor) capable of performing the corresponding operations.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the other embodiments. The singular expressions may include plural expressions unless the context clearly dictates otherwise. Terms used herein, including technical or scientific terms, may have the same meaning as commonly understood by one of ordinary skill in the art having recited herein. General predefined terms used herein may be interpreted in the same or similar sense as the contextual meanings of the related art and are to be understood as meaning ideal or overly formal meanings unless explicitly defined herein . In some cases, the terms defined herein can not be construed to exclude embodiments of the present disclosure.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a system for integrating national power according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram showing a national power integrated operation system according to an embodiment of the present invention, FIG. 2 is a block diagram showing a configuration of the energy storage management system shown in FIG. 1, FIG. 2 is a block diagram illustrating an energy storage system management server according to an embodiment of the present invention.

As shown in FIG. 1, a national power integrated operation system 100 according to an embodiment of the present invention includes a plurality of energy storage management systems 200 and an energy storage system operation server 300.

The plurality of energy storage management systems 200 are connected to the power lines TL and DL of the idle equipment and function to discharge and charge the power corresponding to the load of the power grid.

Each of the plurality of energy storage management systems 200 may be a tower-type energy storage management system distributed in a nationwide area.

Here, the energy storage management system 200 stores the remaining power of the total gross output of the nation except the base load power and the heavy load power as the operation reserve power and the standby reserve power in the minimum load period, And supplies power corresponding to the actual load of the idle equipment.

Each energy storage management system may include a plurality of batteries of MW or more designed and manufactured based on the number of idle facilities, the number of days of operation, the total amount of operation power, and the like.

More specifically, the energy storage system 200 includes an EMS 210, a PCS 220, a BMS 230, and a battery 240.

The EMS 210 monitors the operation state of the power grid (grid) to calculate power required in the grid (system), and determines the calculated power as the output of the energy storage management system.

The PCS 220 plays a role of complementing each other due to the fact that the power conversion system has different characteristics in charging and discharging energy. Specifically, the PCS 210 receives power from a power source, stores the power in the battery 240, and converts electrical characteristics (AC / DC, voltage, frequency, etc.) to discharge it to the power grid.

The BMS 230 is a battery management system that notifies a charge state of each battery cell through an external interface and performs a protection function to prevent exposure to overcharge / overdischarge / overtemperature / low temperature / overcurrent .

The battery 230 is charged with the power converted into the predetermined form via the PCS 220, and the charged power is discharged.

Meanwhile, the EMS 210 communicates with an energy storage management system operation server 300, which will be described later, through a network, and stores the stored energy in accordance with the scheduling information provided by the energy storage management system operation server 300, And manages the BMS 230 to discharge (supply) the reserve power to the power supply for the base load power and the power for the intermediate load.

The EMS 210 may collect operational status information of the PCS 220, the BMS 230, and the battery 240 in real time and provide the information to the energy storage management system operating server 300.

The operation state information may be information including a rated output, a rated capacity, a usable capacity, a charge / discharge efficiency, a cycle life specification, and the like.

Meanwhile, when the number of batteries is plural, the EMS 210 may calculate the total load ratio of the plurality of batteries, and then provide the total rated output based on the calculated load ratio.

The load factor applied to the rated output may be applied when the load factor corresponds to a predetermined threshold value or more.

In addition, the EMS 210 controls the BMS 230 to time-divisionally operate a plurality of batteries for a predetermined period when the total load factor is equal to or less than the threshold value. That is, when the total load factor is less than or equal to the threshold value, only a minimum number of batteries are operated during the divided time by dividing the predetermined period, so that an output close to the rated output can be generated. As shown in FIG.

Next, the energy storage management system operating server 300 predicts the operation period and the power demand of the idle equipment by using the actual load pattern algorithm, and then determines ESS scheduling information for discharging the power during the predicted operation period To each energy storage management system.

In other words, based on the learning information obtained by learning the load pattern of the power distribution for the base load and the power for the intermediate load, the power of the operation reserve and the standby reserve is set to the peak load period of the actual load of the base load power and intermediate load power The base load power and the intermediate load power to control the discharging operation of the at least one energy storage system so that the peak load power of the base load power is reduced.

The energy storage management system operating server 300 may include an information collecting unit 310, a load pattern calculating unit 320, an ESS operation scheduling unit 330, and an ESS monitoring unit 340.

The information collecting unit 310 collects status information including at least one of the available power capacity, the discharge depth, and the battery power, including characteristic information including operating cycle information (charge operation and discharge operation) of each energy storage management system . Also, the information collecting unit 310 collects the base low power consumption pattern information on a regional basis.

The load pattern predicting unit 320 applies the operation period, the power consumption, the peak load reduction, etc. of the idle facility to the actual load pattern algorithm through the PT and CT at the previous year and the previous year, Predict messenger consumption patterns.

In addition, the load pattern predicting unit 320 predicts the peak load period and the peak cut (peak load corresponding amount) of the base low power of the current year by applying the base load amount of the local unit in the previous year and the previous year to the actual load pattern algorithm .

The ESS operation scheduling unit 330 predicts the start point and the operation power of the idle facility of the current year based on the load pattern predictor 320 and determines a charge / discharge control command of the energy storage management system ESS scheduling information and a peak load correspondence command.

Here, the ESS scheduling information is generated by supplying (discharging) the standby power stored in the energy storage management system to the grid load of the base load power and the intermediate load power in accordance with the peak load period of the base load power during the period excluding the operation period of the idle equipment Lt; / RTI >

The operation command may include a demand management target value (a reserve power value of an idle facility) which is a reference value of charging and discharging decisions of the energy storage management system.

Here, if the demand management target value is pushed in the supply capacity of the energy storage management system, the target value is not renewed and is continuously maintained. If demand exceeding the available capacity is demanded, The target value may be changed to an exceeded value.

The ESS scheduling information may be varied according to the state information (available power capacity, discharge depth, battery power amount) of the energy storage management system distributed on a regional basis, and the increase and decrease of the idle equipment. Next, the monitoring unit 340 monitors the operation state based on the state (operation) information of each energy storage system 200.

FIG. 4A is a graph dividing the monthly consumption pattern of the conventional domestic total power into the standby power and the standby power of idle equipment.

FIG. 4B is a simulation graph simulating the monthly consumption pattern of the total power in the case of applying the national power integrated operation system according to an embodiment of the present invention.

Referring to FIG. 4B, when the spare power supply of the idle equipment is replaced with the energy storage system, it can be confirmed that the peak load can be lowered by replacing the redundant power of the idle equipment with the standby power.

FIG. 4C is a simulation graph simulating the monthly consumption pattern of the total domestic power with the peak load reduced by the power integrated operation system when the national power integrated operation system according to the embodiment of the present invention is applied

Referring to FIG. 4C, when the spare power supply of the idle equipment is replaced with the energy storage system, it can be confirmed that the peak load can be lowered by replacing the redundant power of the idle equipment with the standby power.

This means that the maximum load can be reduced by discharging and discharging the power corresponding to the actual load of the base low power, which means that the energy storage management system can be extended and operated with the target value of the base low power saving.

In other words, the load leveling of the base low power can be performed perfectly, the load leveling and the maximum load reduction effect can be obtained at the same time, and the effective electricity cost can be saved most effectively through effective peak load control and generation source adjustment.

If the national power integrated operation system according to the embodiment of the present invention is used, it is possible to store as the active standby power for reducing the peak load in the minimum load period of the remaining power excluding the base load power and the intermediate load power among the total gross production power of the country, It is possible to supply only the electric power corresponding to the actual load during the operation period of the reserve power, thereby reducing the production and consumption of the surplus electric power according to the reserve ratio of the spare facility.

In addition, the national power integrated operation system according to an embodiment of the present invention can provide the reserve power stored as the active standby power of the idle facility at the peak load period (peak interval) of the standby power of low power, Peak to Peak) can be maintained smoothly.

In addition, the national power integrated management system according to an embodiment of the present invention arranges an energy storage system in units of a base (nationwide area), and compensates transient phenomena such as a voltage fluctuation and a frequency fluctuation of a power grid between a base and a base Thus, there is an advantage in that the power surge caused by the power consumption of the base load power and the intermediate load power consumption can be prevented in advance.

In one embodiment of the invention, the functions described may be implemented in hardware, software, firmware, or any combination thereof. If implemented in software, these functions may be stored or transmitted as one or more instructions or code on a computer readable medium. Computer-readable media includes both communication media and computer storage media including any medium that facilitates transfer of a computer program from one place to another. The storage medium may be any available media that is accessible by a computer. By way of example, and not limitation, such computer-readable media can comprise any computer-readable medium, such as RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, And any other medium that can be used to store and be accessed by a computer. Also, any connection is properly referred to as a computer-readable medium. For example, if the software is transmitted from a web site, server, or other remote source using a wireless technology such as coaxial cable, fiber optic cable, twisted pair cable, digital subscriber line (DSL), or infrared, radio and ultra high frequency, Wireless technologies such as fiber optic cable, twisted pair, DSL, or infrared, radio and microwave are included in the definition of media. Disks and discs as used herein include compact discs (CDs), laser discs, optical discs, digital versatile discs (DVD), floppy discs and Blu-ray discs, While discs reproduce data optically by means of a laser. Combinations of the above should also be included within the scope of computer readable media.

When an embodiment is implemented as program code or code segments, the code segment may be a procedure, a function, a subprogram, a program, a routine, a subroutine, a module, a software package, a class or instructions, data structures, As well as any combination thereof. A code segment may be coupled to another code segment or hardware circuit by conveying and / or receiving information, data, arguments, parameters or memory contents. Information, arguments, parameters, data, etc. may be communicated, sent, or transmitted using any suitable means including memory sharing, message passing, token passing, Additionally, in some aspects, steps and / or operations of a method or algorithm may be performed on one or more of the codes and / or instructions on a machine readable medium and / or computer readable medium that may be integrated into a computer program product As a combination or set of < / RTI >

In an implementation in software, the techniques described herein may be implemented with modules (e.g., procedures, functions, and so on) that perform the functions described herein. The software codes may be stored in memory units and executed by processors. The memory unit may be implemented within the processor and external to the processor, in which case the memory unit may be communicatively coupled to the processor by various means as is known.

In a hardware implementation, the processing units may be implemented as one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays Controllers, microcontrollers, microprocessors, other electronic units designed to perform the functions described herein, or a combination thereof.

Furthermore, as used in this application, the terms "component," "module," "system," and the like are intended to encompass all types of computer- Entity. For example, a component may be, but is not limited to, a process running on a processor, a processor, an object, an executable execution thread, a program, and / or a computer. By way of illustration, both the application running on the computing device and the computing device can be components. One or more components may reside within a process and / or thread of execution, and the components may be centralized on one computer and / or distributed between two or more computers. These components may also be executed from various computer readable media having various data structures stored thereon. The components may be associated with a signal having one or more data packets (e.g., data from a local system, data from another component of the distributed system and / or signals from other components interacting with other systems via a network such as the Internet) Lt; RTI ID = 0.0 > and / or < / RTI > remote processes.

The present invention is not limited to the above-described embodiments and the accompanying drawings. It will be apparent to those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

100: National power integrated operation system
200: Energy storage management system
210: EMS
220: PCS
230: BMS
240: Battery
300: Energy storage system operation server
310: Information collecting unit
320: a load pattern predicting unit
330: ESS operation scheduling unit
340: ESS monitoring unit

Claims (6)

At least one energy storage system for storing the remaining power of the total gross output power of the idle equipment excluding the base low power and for supplying the power corresponding to the actual load of the idle equipment during the operation period of the idle equipment; And
And an energy storage system operating server for providing ESS scheduling information for discharging the power to the energy storage system in a predicted operation period after predicting the operation period and power demand of the idle facility using the actual load pattern algorithm and,
The energy storage system management server
And the peak power of the idle equipment is supplied to the base power of the base power at the actual load peak period of the base power based on the learning information of the load pattern of the base power of the base power, Controlling a discharge operation of the at least one energy storage system,
The energy storage system management server
The measurement values of the PT and the CT including the operation period, the power consumption and the peak load reduction of the idle facility are applied to the actual load pattern algorithm at the time of the previous year and the previous year to determine the operation period and the power consumption pattern A load pattern predicting unit for predicting the peak load period and the peak cut of the base low power of the current year by applying the base power amount of the local unit in the previous year and the previous year to the actual load pattern algorithm; And
And an ESS operation scheduling unit for providing the ESS scheduling information including an operation command for charging and discharging electric power corresponding to the operation power of the idle facility,
The ESS scheduling information includes
Scheduling information for supplying (discharging) the reserve power stored in the energy storage system to the power grid of the base load power and the intermediate load power in accordance with the peak load period of the base load power during a period excluding the operation period of the idle facility for a year,
The power charge amount of the at least one energy storage system
A national power integrated operational system determined based on the number of idle facilities, power consumption, and peak power distributed over a geographical area.
The method according to claim 1,
The energy storage system management server
And the power charge amount is checked in real time based on the state information of the at least one energy storage system.
delete delete The method according to claim 1,
The energy storage system management server
A monitoring unit monitoring at least one of a rated output, a rated capacity, a usable capacity, a charge / discharge efficiency, and a cycle life specification of each of the at least one energy storage system.
delete

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