KR101904902B1 - Operating systems of the energy storage system - Google Patents

Abstract

The present invention relates to an operating system of an energy storage device, wherein a business operator installs an energy storage device in a customer company without installation costs, stores power in the energy storage device at a time period when an energy demand is low by the customer company, and supplies power at a time when the power is most demanding, thereby increasing energy efficiency and power safety and charging installation costs of the energy storage device as power saving costs accompanied by efficient operation of energy to the business operator to secure benefits for both the business operator and the customer company. The operating system of an energy storage device comprises: a customer company system which provides power consumption information and pays facility installation costs in a rental fee form after a business contract for installation and operation of an energy storage device; and a business operator system which generates power consulting information on the basis of power consumption information received from the customer company system, sets a contract period of the energy storage device on the basis of the generated power consulting information, and performs a business contract with the customer company system.

Description

[0001] The present invention relates to an operating system of an energy storage system,

The present invention relates to an operating system of an energy storage system (ESS). In particular, a business operator installs an energy storage device in a customer company without installing the equipment, and stores electricity in an energy storage device And supply power at the time when power is most needed, thereby enhancing energy efficiency and power safety. At the same time, the installation cost of the energy storage device is treated by the business operator with the power saving cost accompanying the efficient operation of the energy, To an operating system of an energy storage device.

Energy Storage System (ESS) is a system that stores generated power in each connected system, including power plants, substations, and transmission lines, and then uses the power selectively and efficiently at the required time to improve energy efficiency.

Such an energy storage system is called an electrical energy system because it stores electrical energy and outputs the stored energy to electrical energy. The energy storage system can reduce the power generation cost when the overall load ratio is improved by leveling the electric load with large time and seasonal variation, and it is possible to reduce the investment cost and the operation cost required for the electric power facility expansion, . ≪ / RTI >

In particular, the energy storage system is installed in power generation, transmission, distribution, and customer in the power system. Frequency regulation, generator output stabilization by using renewable energy, peak shaving, load leveling ), And emergency power source.

Conventionally proposed techniques for an energy storage system are disclosed in Patent Documents 1 to 4 below.

The prior art disclosed in Patent Document 1 includes a battery management system that controls charging or discharging of a battery, a battery management system that supplies DC energy to the battery through the battery management device, or DC energy stored in the battery, And an energy storage system (ESS) controller for controlling operation of the battery management device and operation of the bidirectional converter in response to real-time power price information transmitted from the smart meter.

With such a configuration, when the real time power price information is higher than the reference electric power price information, the battery management device and the bidirectional converter are controlled to convert DC energy stored in the battery into AC energy to be supplied to the load, The battery management device and the bidirectional converter are controlled to convert the alternating current energy of the power system into direct current energy and stored in the battery.

The prior art disclosed in Patent Document 2 is a system in which a plurality of sewage / wastewater treatment plants, a large ESS, and a large renewable energy are combined in an optimum manner by utilizing the power usage history data of each load management company to maximize profits to provide.

In addition, the prior art disclosed in Patent Document 3 stores energy,

Requesting ESS status information about the energy storage system (ESS) and the operation status of the energy storage system, receiving a response message corresponding to the requested ESS status information, and based on the received response message And a dual communication terminal for receiving the ESS status information request from the terminal and the ESS status information request message for the received ESS status information request to the energy storage system do.

This configuration provides an energy storage system monitoring and control system that can easily monitor and stably control the energy storage system.

In addition, the prior art disclosed in Patent Document 4 can optimally operate a power system by taking into consideration the technical characteristics of ESS and the analysis of a leeway amount in a power system including a plurality of energy storage systems (ESS) And provides an operating device of the power system including an energy storage device managed to manage the power system.

Korean Patent Publication No. 10-2014-0009776 (published on April 23, 2014) (Energy Storage System, Control Method of Energy Storage System) Korean Patent Publication No. 10-2016-0116068 (published October 10, 2016) Korean Patent Publication No. 10-2016-0121919 (published on October 21, 2016) (Monitoring and Control System of Energy Storage System) Korean Registered Patent No. 10-1703296 (Announcement of 2017.02.06) (Operation of power system including energy storage device)

However, the conventional energy storage systems and conventional technologies can efficiently manage the energy using the energy storage system. However, since the expensive energy storage system must be purchased directly from the customer, the energy storage system There is a disadvantage that it is limited to generalize.

Accordingly, it is an object of the present invention to provide an energy storage device that can be installed in an energy storage device at a time of low energy demand from a customer, Saving and supplying power at the time of greatest need to increase energy efficiency and power safety, and at the same time, the cost of installing the energy storage device with the energy saving cost accompanied by the efficient operation of energy is handled to the business operator, And to provide an operating system of an energy storage device that can be realized.

Another object of the present invention is to provide a system and a method for constructing an energy storage device by constructing a facility (energy storage device) and investing the ownership of the facility to the customer and investing the facility installation cost in the form of rent And to provide an operation system of an energy storage device in which a business operator can recover investment costs.

In order to achieve the above-mentioned object, the operating system of the energy storage device according to the present invention provides information on the amount of power consumption, and the facility installation cost of the energy storage device is paid in the form of rent after the business contract Customer system; A business operator system for generating power consulting information based on power usage information received from the client system, setting a contract period of the energy storage device based on the generated power consulting information, and conducting a business contract with the customer company system .

In the above, the customer's system is characterized by paying the mutually agreed rent including the electricity saving cost generated by the operation of the energy storage device and the cost used by the use of the spare / emergency power source.

The customer system includes a facility operation server for collecting electric power usage amount, providing the electric energy usage amount to the business operator system, managing facility operation information after a business contract for installation and operation of the energy storage device, And an energy storage device for storing power at minimum load in cooperation with the facility operation server and supplying power stored at a time when power is required to stably supply power.

The facility operation server may include a power consumption collector for collecting power consumption; A power information providing unit for generating and providing power information based on the power consumption collected by the power consumption collecting unit; And a facility operation information management unit for managing the operation information of the energy storage device.

The energy storage device includes a power conversion device for charging a battery management device that manages a battery that stores and discharges energy, and supplies power to the system; And a power management unit for controlling charge and discharge of electric power through the control of the battery management device and the power conversion device and for protecting the battery management device and the power conversion device through the protection relay.

The power management unit may include a load analysis unit for analyzing a state of the power conversion device as a load; And a multiple operation mode control unit for controlling the operation mode of the load based on the load analysis result analyzed by the load analysis unit to control the distribution and concentration of the load.

In this case, the multi-operation mode control unit controls the load distribution based on the operation time of the load among the load analysis results, thereby preventing a decrease in service life of the load and preventing the efficiency from being lowered.

The business operator system includes an information collection unit for collecting power information of a customer system through a network; And a consulting information generating unit for generating consulting information for power saving based on the information collected by the information collecting unit.

The business operator system may further include a contract term setting unit for setting a business contract term for installation and operation of the energy storage device based on the consulting information generated by the consulting information generation unit.

The contract term setting unit may set a business contract period according to an electricity saving cost caused by installation of the energy storage device.

According to the present invention, a business operator installs an energy storage device at no cost to a customer, stores electricity in an energy storage device at a time when energy demand is low from the customer, and supplies the energy storage device at a time when power is most needed, It is advantageous that both the project owner and the client can realize the profit by processing the installation cost of the energy storage device to the business operator due to the power saving cost that occurs.

In addition, the customer according to the present invention has an advantage that the load stability can be secured by using the energy storage device and the power quality can be assured.

1 is a schematic configuration diagram of an operating system of an energy storage device according to the present invention,
FIG. 2 is a block diagram of an embodiment of the facility operation server of FIG. 1;
FIG. 3 is a block diagram of an embodiment of the energy storage device of FIG. 1,
FIG. 4 is a block diagram of an embodiment of the power management unit of FIG. 3,
FIG. 5 is a block diagram of an embodiment of the business operator system of FIG.
6 is a diagram illustrating an example of generating energy consulting information in the present invention,
FIG. 7 is an example of setting a contract term based on energy consulting information in the present invention; FIG.

Hereinafter, an operating system of an energy storage device according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a general configuration diagram of an operating system of an energy storage device according to a preferred embodiment of the present invention, and provides information on power consumption, Generates a power consulting information based on power consumption information received from the customer company system 100, sets a contract period of the energy storage device based on the generated power consulting information, And a business operator system 300 that performs a business contract.

The operating system of the energy storage device according to the present invention is interposed between the customer company system 100 and the business operator system 300 and is a network for interfacing data between the customer company system 100 and the business operator system 300. [ (200).

Here, the network 200 can use various communication networks such as the Internet, a public telephone network, a data network, an LTE network, and a CDMA network.

The customer company system 100 preferably pays mutually agreed rents including the cost of electricity savings resulting from the operation of the energy storage device and the costs used due to the use of the reserve / emergency power source to the business operator.

The customer company system 100 includes a facility operation server 110 for collecting electric power consumption, providing the electric energy consumption to the business operator system 300, managing facility operation information after a business contract for installation and operation of the energy storage device, And an energy storage unit (ESS) 120 that interlocks with the operation server 110 to store power at a minimum load and supply power stored at a required time to stably supply power.

2, the facility management server 110 includes a power consumption collecting unit 111 for collecting power consumption, a power consumption collecting unit 111 for collecting power information based on the power consumption collected by the power consumption collecting unit 111, A business contract section 113 for negotiating a business contract for installation and operation of the energy storage device with the business executioner system 300, a management contract management section 113 for managing the operation information of the energy storage device, A facility operation information management unit 114, and a rent processing unit 115 for processing rent payment.

3, the energy storage device 120 includes a battery management device 121 that manages a battery that stores and discharges energy, a battery management device 121 that charges the battery management device 121 with electric power, The battery management apparatus 121 controls the charging and discharging of electric power through the control of the battery management apparatus 121 and the power conversion apparatus 122, And a power management unit 123 for protecting the conversion device 122. [

4, the power management unit 123 includes a charging / discharging control unit 123a for controlling charging and discharging, a power device protection unit 123a for protecting the power device from overcurrent / overvoltage and surge voltage through a protection relay, A load analysis unit 123c for analyzing the state of the power conversion apparatus 122 as a load, a control unit 123b for controlling the operation mode of the load based on the load analysis result analyzed by the load analysis unit 123c, And a Droop control unit 123e for controlling the parallel operation of a plurality of power conversion apparatuses PCS without master / slave synchronization by a separate communication line.

Preferably, the multiple operation mode control unit 123d controls the load distribution based on the operation time of the load among the load analysis results, thereby preventing a decrease in service life of the load and preventing the efficiency from being lowered.

The business operator system 300 includes an information collecting unit 310 for collecting power information of the customer company system 100 through the network 200 and a power saving unit 310 for collecting power information based on the information collected by the information collecting unit 310. [ A contract period setting unit 320 for setting a contract period for installing and operating the energy storage device on the basis of the consulting information generated by the consulting information generating unit 320, A business contract unit 340 for performing a business contract for installing and operating the energy storage device through the interlocking with the customer company system 100, and a customer company management unit 350 for managing the customer company.

Here, the contract term setting unit 330 preferably sets the term of the business contract and the rent according to the electricity saving cost generated by the installation of the energy storage device.

The operation of the energy storage system according to the present invention will now be described in detail.

First, a business executor who installs the energy storage device at a customer's facility without additional installation cost and collects the investment cost by receiving the rent based on the electricity saving cost generated by the operation of the energy storage device, Through the network 200, and requests power consumption information of the client company. Here, the customer can access the energy storage device business site established on-line using the business operator system 300 by the business operator, and can provide his / her own power consumption information and request a business contract.

The customer collects the power consumption of the customer through the power consumption collecting unit 110 of the facility operation server 110 of the customer company system 100 according to the request of the customer company or the business contract request of the business operator. This is where the customer collects the electricity consumption of the building or the plant when the customer uses a single building or a single factory. desirable. The collection of electric power consumption is collected through the Korea Electric Power Corporation or in conjunction with the electric power meter installed at KEPCO.

The power information providing unit 112 receives the power usage information collected by the power usage collecting unit 110 and supplies the power usage information to the power information providing unit 112. The power information providing unit 112 determines whether or not the customer's own information for identifying the customer, And transmits the generated power information to the business operator system 300. The power information is generated by mapping the position information and the used power amount information,

The information collecting unit 310 of the business operator system 300 collects the power information of the customer through the network 200 and stores it in an internal database (DB). When storing the power information collected in the database, it is preferable to classify and store the information according to the customer specific information and the location information.

Next, the consulting information generator 320 calculates a power saving cost that can be saved when the energy storage device is used based on the customer's power information stored in the database, and generates the consulting information as the consulting information.

Here, it is preferable that the consulting information generates the consulting information through the saving mechanism as shown in FIG. 6 is an example of the electricity savings when using the 50 MW energy storage device of FIG.

The consulting information thus generated is transmitted to the contract period setting unit 330. The contract period setting unit 330 sets a business contract period and a rent for the installation and operation of the energy storage device based on the consulting information. FIG. 7 is an example of calculating the cumulative profit and business contract period occurring in the installation of the energy storage device (ESS) based on the consulting information for industrial electric power. The electricity savings here can be calculated on a daily, weekly, monthly or yearly basis. It is desirable to reflect the project contract period and rent setting, including the cost of additional preliminary / emergency power supply, when setting the project contract period and rent.

When the contract term and the rent setting are finally completed through the process, the contract term setting information is transmitted to the business contract section 340.

The business contracting unit 340 transmits consulting information, contract period setting information, rent information, and the like to the customer through the network or off-line.

The customer company reviews consulting information, contract period setting information, rent information, and the like, and concludes a business contract through consultation with the business operator in the network (200) or offline when the business contract is desired.

When the energy storage device business contract is concluded, the business operator installs the energy storage device 120 at the customer company within a predetermined period.

After the energy storage device 120 is installed in the customer company, the serial operation information management part 114 in the facility operation server 110 acquires the operation information of the energy storage device 120 in real time and stores it as facility operation information. If necessary, the facility operation information may be transmitted to the business operator system 300 to request that there is better consulting information that can efficiently perform the contract business. In accordance with the request, the business operator may, Based on the information, we continually consult about power usage so that customers can operate energy storage device more efficiently. In addition, the rent processor 115 will pay rent by connecting with the project operator during the contracted rent period after the contract is concluded.

As a result, the customer can install the energy storage device without the initial purchase fund of the expensive energy storage device, thereby reducing the cost. In addition, the project developer collects the facility investment cost through the rent paid during the contracted period.

Meanwhile, when the energy storage device 12 is installed in the customer, the battery management device (BMS) 121 measures a charged amount and a discharged amount of the built-in battery, and manages the battery using a normal battery management method.

In addition, the power conversion unit (PCS) 122 charges the battery at low cost at the time of minimum load (for example, at midnight-5 am in the morning) according to charge or discharge control of the power management unit 123, The power supplied to the battery is converted into power suitable for the power system and supplied to the power system at the required time (at the time of the maximum load, when the emergency power source is required, when the spare power source is required, etc.). Here, the power conversion device (PCS) 122 is installed in plural when there are a plurality of factories or a plurality of buildings.

The charging / discharging control unit 123a of the power management unit 123 of the energy storage device 12 is connected to the battery management device 121 and the power conversion device 122 in communication so as to control charging and discharging, The power device protection unit 123b detects power in real time and prevents damage or malfunction of the power device by using a protection relay when the power is determined to be abnormal due to overcurrent, overvoltage, surge voltage, or the like.

As another feature of the present invention, the power management unit 123 improves energy efficiency and power quality to improve power stability.

For example, the power converter 122 may be optimized for power charging and discharging using a bi-directional inverter, which is a high performance PCS, stores power in a battery at a minimum load and supplies power at the time of greatest need, It also considers power safety while improving.

Another advantage of the present invention is that the life of the power device can be extended through load distribution and concentration, and battery efficiency can be increased.

For example, the load analysis unit 123c analyzes the use time of the load in a method of counting the use time of a plurality of power conversion apparatuses, and transmits the analysis to the multiple operation mode control unit 123d.

The multi-operation mode control unit 123d uses the multi-operation mode control method based on the load analysis result analyzed by the load analysis unit 123c to uniformly use the plurality of power conversion devices. If a plurality of power conversion apparatuses are operated by evenly distributing the loads without using the specific loads concentratedly, it is possible to extend the life of the power conversion apparatus due to the uniform use of the power conversion apparatus, And the discharge can be performed, so that the battery efficiency can be improved.

As another feature of the present invention, there is an advantage in that a plurality of power conversion apparatuses are controlled in parallel operation through the droop control unit 123e, thereby complicated synchronization process between master / slaves by a separate communication line is not performed.

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 is obvious to those who have.

The present invention is applied to a technique for efficiently using energy by using an energy storage device.

100: Customer system
110: Facilities Operation Server
111: Power consumption collecting unit
112: Power information providing service
113: Business Contract Department
114: Facilities Operation Information Management Department
115: Rent processor
120: Energy storage device
121: Battery management device
122: power converter
123:
123a: charging / discharging control unit
123b: Power device protection section
123c: load analysis unit
123d: Multiple operation mode control section
123e: Droop control unit
200: Network
300: Business Operator System
310: Information collecting unit
320: consulting information generating unit
330: contract term setting section
340: Business Contract Department
350: Customer management department

Claims (10)

A system for installing and operating an energy storage (ESS) comprising a reserve / emergency power source,
A customer system that provides information on power usage and installs facility installation and operation of the energy storage system, and pays facility installation costs in the form of rent; And
A business operator system for generating power consulting information based on power usage information received from the client system, setting a contract period of the energy storage device based on the generated power consulting information, and conducting a business contract with the customer company system and,
The customer company system includes a facility operation server for collecting electric power consumption, providing the electric energy consumption to the business operator system, managing facility operation information after a business contract for installation and operation of the energy storage device, And an energy storage device for storing power at minimum load in cooperation with the facility operation server and supplying power stored at a time when power is needed to stably supply power,
The energy storage device includes a power management unit that controls charging and discharging of electric power through control of the battery management device and the electric power conversion device and protects the battery management device and the electric power conversion device through the protection relay,
Wherein the power management unit includes: a load analysis unit for analyzing a state of the power conversion device as a load; A multiple operation mode control unit for controlling the operation mode of the load based on the load analysis result analyzed by the load analysis unit to control the distribution and concentration of the load; And a droop control unit for controlling parallel operation of a plurality of power conversion apparatuses (PCS) without master / slave synchronization by a separate communication line,
The multi-operation mode control unit controls the load distribution on the basis of the operation time of the load among the load analysis results, thereby preventing a decrease in service life of the load,
The customer's system pays mutually agreed rents, including the cost of electricity savings incurred as a result of the operation of the energy storage and the cost of using the reserve / emergency power source,
The business operator system includes a contract period setting unit for setting a business contract period for installation and operation of the energy storage device based on the power consulting information,
Wherein the contract term setting unit sets a term of a business contract and a rent according to an electricity saving cost generated due to installation of the energy storage device.
delete delete The facility management server of claim 1, wherein the facility management server comprises: a power usage collector for collecting power usage; A power information providing unit for generating and providing power information based on the power consumption collected by the power consumption collecting unit; And a facility operation information management unit for managing the operation information of the energy storage device.
The energy storage device according to claim 1, wherein the energy storage device includes a power conversion device that charges power to a battery management device that manages a battery storing and discharging energy and supplies power to the system. .
delete delete The system of claim 1, wherein the business operator system comprises: an information collector for collecting power information of a customer system through a network; And a consulting information generating unit for generating consulting information for power saving based on the information collected by the information collecting unit.







delete delete

Images