CN111164853A

CN111164853A - Power supply control system and method utilizing energy storage device and solar energy for power generation

Info

Publication number: CN111164853A
Application number: CN201980003859.9A
Authority: CN
Inventors: 金庾河
Original assignee: Guangming Electric Engineering Co Ltd
Current assignee: Guangming Electric Engineering Co Ltd
Priority date: 2018-05-23
Filing date: 2019-02-11
Publication date: 2020-05-15
Also published as: KR101945501B1; WO2019225834A1

Abstract

An embodiment of the present invention provides a power supply control system, including: the solar power generation amount prediction unit predicts the power generation amount of the solar power generation module according to the sunshine amount data; a power consumption prediction unit that predicts a real-time power consumption of the power consumer based on past power consumption data of the power consumer to be supplied with power; and a power supply control unit that supplies power to the electricity consumer through the controller when the real-time usage electricity amount of the electricity consumer is greater than the target demand electricity amount of the electricity consumer, based on the information of the electricity generation amount predicted by the solar electricity generation amount prediction unit, the information of the real-time usage electricity amount of the electricity consumer predicted by the usage electricity amount prediction unit, and the information of the electricity amount stored in the energy storage system.

Description

Power supply control system and method utilizing energy storage device and solar energy for power generation

Technical Field

The present invention relates to a power supply control system and method using an energy storage device and solar power generation, and more particularly, to a power supply control system and method for continuously comparing a target power demand of each of a plurality of power consumers with a power generation amount by solar power generation and a power amount stored in an energy storage device to supply power to the power consumers.

Background

An Energy Storage System (ESS) stores electric Energy and uses it when needed, thereby improving Energy utilization efficiency and guiding a device for stabilizing a power supply System. In general, an energy storage system is used to prevent a large-scale power outage during a period of time when power consumption is concentrated in summer or in a region where many factories are dense. In particular, in a place where electricity is frequently used, such as an industrial area where a large-scale factory is dense, an energy storage system needs to be used in order to stop power and reduce electricity charges.

The existing energy storage system mainly uses the following modes: the method comprises the steps of generating and storing electricity at night when the electricity consumption is small and the electricity fee is relatively low, and supplying the electricity stored in an energy storage system at daytime when the electricity consumption is large and the electricity fee is relatively high; and new energy such as solar energy is utilized to generate electricity in the day time with enough sunlight, and the electricity is mixed with system electricity for use.

As described above, the energy storage system has many advantages, and therefore, it is necessary to expand to various types of electric power consumer groups (industrial areas, commercial buildings, public houses, and the like), but the expansion of the energy storage system is hindered by low operational profit, high initial investment cost, and the like. Therefore, a new value-added production scheme utilizing an energy storage system is initiated, and the following services appear: the energy generated by the solar power generation is stored in the energy storage system, and the energy stored in the energy storage system is used for supplying power to the power consumer when the power consumer needs the energy.

However, the power supply service as described above does not take into consideration the predicted values of the amount of power based on solar power generation, the battery of the energy storage system that constantly changes, and the target required amount of power for the power consumer, which are often different due to meteorological conditions.

Disclosure of Invention

Technical problem to be solved

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a power supply control system and method using an energy storage device and solar power generation, which continuously compare a target required power amount of each of a plurality of power consumers with a power generation amount based on solar power generation and a power amount stored in the energy storage device, provide the power consumers with the target required power amount, and notify the power consumers of a modified value of the target required power amount when a sum of the power generation amount based on solar power generation and the power amount stored in the energy storage device is less than the target required power amount.

The technical problems to be solved by the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by those skilled in the art from the following description.

Means for solving the problems

In order to solve the technical problem, an embodiment of the present invention provides a power supply control system, which utilizes a solar energy application system, including: a solar power generation module for generating electric energy by using solar energy; an Energy Storage System (ESS) that stores the electrical Energy generated by the solar power generation module; and a controller that controls a flow of the electric power generated by the solar power generation module and a flow of the electric power stored in the energy storage system, the power supply control system including: the solar power generation amount prediction unit predicts the power generation amount of the solar power generation module according to the sunshine amount data; a power consumption prediction unit that predicts a real-time power consumption of the power consumer based on past power consumption data of the power consumer to be supplied with power; and a power supply control unit that supplies power to the electricity consumer through the controller when the real-time usage electricity amount of the electricity consumer is greater than the target demand electricity amount of the electricity consumer, based on the information of the electricity generation amount predicted by the solar electricity generation amount prediction unit, the information of the real-time usage electricity amount of the electricity consumer predicted by the usage electricity amount prediction unit, and the information of the electricity amount stored in the energy storage system.

In this embodiment, the power supply control unit supplies power to the electricity consumer using the power generated by the solar power generation module when the amount of power generation is equal to or greater than a value obtained by subtracting the target required power amount from the real-time usage power amount, and supplies power to the electricity consumer using the power generated by the solar power generation module and the power stored in the energy storage system when the amount of power generation is less than a value obtained by subtracting the target required power amount from the real-time usage power amount and the sum of the amount of power generation and the power stored in the energy storage system is equal to or greater than a value obtained by subtracting the target required power amount from the real-time usage power amount.

In this embodiment, the power supply control unit may further include a power supply calculation unit that calculates supply power that can be supplied to the electricity consumer when a sum of the amount of electricity generated and the amount of electricity stored in the energy storage system is smaller than a value obtained by subtracting the target required amount of electricity from the real-time usage amount of electricity, and the power supply control unit may supply the supply power calculated by the power supply calculation unit to the electricity consumer.

In this embodiment, the electricity consumers are a group of electricity consumers comprising a plurality of electricity consumers, the used electricity amount prediction unit predicts the real-time used electricity amounts of the electricity consumers based on past electricity consumption data of the electricity consumers, the electricity supply control unit supplies electricity to the electricity consumers having a real-time used electricity amount larger than a target required electricity amount based on information on the amount of electricity generated by the solar electricity generation amount prediction unit, information on the real-time used electricity amounts of the electricity consumers predicted by the used electricity amount prediction unit, and information on the amount of electricity stored in the energy storage system, and the electricity supply calculation unit calculates the supplied electricity to the electricity consumers when the sum of the amount of electricity generated and the amount of electricity stored in the energy storage system is smaller than a value obtained by subtracting the sum of the target required electricity amounts of electricity of the electricity consumers from the sum of the real-time used electricity amounts of the electricity consumers, the power supply control unit may supply the supply power calculated by the power supply calculation unit to the plurality of power consumers, respectively.

In this embodiment, when the sum of the generated power and the amount of power stored in the energy storage system is smaller than a value obtained by subtracting the sum of the target required power amounts of the plurality of power consumers from the sum of the real-time usage power amounts of the plurality of power consumers, the power supply calculation unit may calculate the power supply amounts x that can be respectively supplied to the plurality of power consumers by subtracting the target required power amounts from the respective real-time usage power amounts of the plurality of power consumers by the following mathematical expression.

X ═ An/Y — (K + S), where An represents the set target reduced power amount for each of the plurality of power consumers, Y represents the sum of the set target power supply amounts for each of the plurality of power consumers, K represents the amount of power stored in the energy storage system, and S represents the amount of power generation.

In this embodiment, when the sum of the generated power and the amount of power stored in the energy storage system is smaller than a value obtained by subtracting the sum of the target required power amounts of the plurality of power consumers from the sum of the real-time usage power amounts of the plurality of power consumers, the power supply calculation unit may calculate respective power rates corresponding to the power amounts obtained by subtracting the values of the target required power amounts from the respective real-time usage power amounts of the plurality of power consumers, and calculate the supply powers to be supplied to the plurality of power consumers, respectively, so as to minimize the sum of the respective power rates.

In this embodiment, when the sum of the generated power and the amount of power stored in the energy storage system is smaller than a value obtained by subtracting the sum of the target required power amounts of the plurality of power consumers from the sum of the real-time usage power amounts of the plurality of power consumers, the power supply calculation unit may calculate the supply power that can be supplied to each of the plurality of power consumers, respectively, and that has the same power rate as the power rate corresponding to the value obtained by subtracting the target required power amount from the real-time usage power amount of each of the plurality of power consumers.

In addition, in order to solve the technical problem, another embodiment of the present invention provides a power supply control method using a power supply control system using a solar application system, the solar application system including: a solar power generation module for generating electric energy by using solar energy; an energy storage system storing the electric energy generated by the solar power generation module; and a controller that controls a flow of electric energy generated by the solar power generation module and a flow of electric energy stored in the energy storage system, the power supply control method including: a prediction step in which the power supply control system predicts the power generation amount of the solar power generation module based on the solar radiation amount data, and predicts the real-time power consumption amount of the power consumer based on the past power consumption data of the power consumer to be supplied with power; a supply or non-supply judging step, wherein the power supply control system judges whether the real-time use electric quantity of the power consumer is larger than the target required electric quantity of the power consumer; and a power supply step of supplying power to the electricity consumer through the controller based on the predicted information on the amount of generated power, the information on the amount of real-time electricity used by the electricity consumer, and the information on the amount of electricity stored in the energy storage system, when it is determined in the supply or non-supply determination step that the amount of real-time electricity used by the electricity consumer is greater than the target amount of electricity required by the electricity consumer.

In this embodiment, the power supplying step may be as follows: the power supply control system supplies power to the electricity consumer using the power generated by the solar power generation module when the power generation amount is equal to or greater than a value obtained by subtracting the target required power amount from the real-time power usage amount, and supplies power to the electricity consumer using the power generated by the solar power generation module and the power stored in the energy storage system when the power generation amount is less than a value obtained by subtracting the target required power amount from the real-time power usage amount and the sum of the power generation amount and the power stored in the energy storage system is equal to or greater than a value obtained by subtracting the target required power amount from the real-time power usage amount.

In this embodiment, the power supply step may further include a power supply calculation process in which the power supply control system compares the sum of the generated power amount and the amount of power stored in the energy storage system with the real-time usage amount of power to the target required amount of power to calculate power supply that can be supplied to the power consumer.

In this embodiment, the power consumer is a power consumer group consisting of a plurality of power consumers, and the predicting step may be: the power supply control system predicts the power generation amount of the solar power generation module according to the sunshine amount data, predicts the respective real-time power consumption of the plurality of power consumers according to the past power consumption data of the plurality of power consumers, and the power supply step may be as follows: and the power supply control system supplies power to the power consumers with the real-time electric quantity larger than the target required electric quantity according to the predicted electric quantity generation information, the respective real-time electric quantity utilization information of the plurality of power consumers and the information of the electric quantity stored in the energy storage system.

In this embodiment, when the sum of the power generation amount and the amount of power stored in the energy storage system is smaller than a value obtained by subtracting the sum of the target required amounts of power for the plurality of power consumers from the sum of the real-time usage amounts of power for the plurality of power consumers, the power supply calculation process may be a process of: the power supply control system calculates the power supply amount x to be supplied to each of the plurality of power consumers by adding a value obtained by subtracting the target required power amount from the real-time power usage amount of each of the plurality of power consumers by the following equation.

In this embodiment, when the sum of the power generation amount and the amount of power stored in the energy storage system is smaller than a value obtained by subtracting the sum of the target required amounts of power for the plurality of power consumers from the sum of the real-time usage amounts of power for the plurality of power consumers, the power supply calculation process may be a process of: the power supply control system calculates respective power rates corresponding to power amounts obtained by subtracting values of target required power amounts from respective real-time power amounts used by the plurality of power consumers, and calculates supply power that can be supplied to the plurality of power consumers respectively so as to minimize a sum of the respective power rates.

In this embodiment, when the sum of the power generation amount and the amount of power stored in the energy storage system is smaller than a value obtained by subtracting the sum of the target required amounts of power for the plurality of power consumers from the sum of the real-time usage amounts of power for the plurality of power consumers, the power supply calculation process may be a process of: the power supply control system calculates the supply power that can be supplied to each of the plurality of power consumers, respectively, at the same power rate as the power rate corresponding to the value obtained by subtracting the target required power amount from the real-time power amount used by each of the plurality of power consumers.

Effects of the invention

According to the invention, the target required electric quantity of each of the plurality of electric power consumers can be continuously compared with the generated electric quantity based on solar power generation and the electric quantity stored in the energy storage device, the target required electric quantity is provided for the electric power consumers, and when the sum of the generated electric quantity based on solar power generation and the electric quantity stored in the energy storage device is less than the target required electric quantity, the modified value of the target required electric quantity is informed to the electric power consumers.

In addition, according to the present invention, after a plurality of power consumers provide power services to a target, power stored in the energy storage device is sold, thereby maximizing the application profit.

The effects of the present invention are not limited to the above-described effects, and all effects that can be inferred from the configurations of the embodiments of the present invention or the technical solutions described in the claims are included.

Drawings

Fig. 1 is a block diagram showing a schematic configuration of a system for providing electric power service to a subject by a plurality of electric power consumers using an energy storage device applicable to an embodiment of the present invention.

Fig. 2 is a diagram showing a detailed structure of a system for providing power service to a subject from a plurality of power consumers using an energy storage device applicable to an embodiment of the present invention and a connection relationship thereof.

Fig. 3 is a diagram showing an example of a power consumer load pattern applicable to an embodiment of the present invention.

Fig. 4 is a diagram for explaining expected service information applicable to the embodiment of the present invention.

Fig. 5 is a flowchart illustrating a sequence of a method for providing power service to a subject from a plurality of power consumers using a power storage device applicable to an embodiment of the present invention.

Fig. 6 is a diagram for explaining a detailed procedure of a service providing step of a method of providing a power service to a subject by a plurality of power consumers using an energy storage device applicable to an embodiment of the present invention.

Fig. 7 is a diagram for explaining a peak clipping and valley filling service applicable to an embodiment of the present invention.

Fig. 8 to 10 are diagrams for explaining power quality service applicable to an embodiment of the present invention.

Fig. 11 and 12 are diagrams for explaining an uninterruptible power supply service applicable to an embodiment of the present invention.

Fig. 13 is a diagram for explaining considerations in providing power services to a power consumer according to an embodiment of the present invention.

Fig. 14 is a block diagram showing the configuration of a power supply control system using an energy storage device and solar power generation according to an embodiment of the present invention.

Fig. 15 is a diagram for explaining the concept of a power supply control system using an energy storage device and solar power generation according to an embodiment of the present invention.

Fig. 16 is a diagram for more specifically explaining a power supply control system using an energy storage device and solar power generation and elements connectable thereto according to an embodiment of the present invention.

Fig. 17 is a diagram for explaining a process of calculating the supply power according to an embodiment of the present invention.

Fig. 18 is a flowchart showing a sequence of a power supply control method using an energy storage device and solar power generation according to another embodiment of the present invention.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In addition, the drawings are only for easier understanding of the embodiments disclosed in the present specification, and the technical ideas disclosed in the present specification are not limited by the drawings, and should be understood to include all modifications, equivalents, and alternatives included in the ideas and technical scope of the present invention. In order to clearly explain the present invention, the size, shape, and shape of each component shown in the drawings may be changed without omitting portions that are not related to the description, and the same or similar portions are denoted by the same or similar reference numerals throughout the specification.

The suffixes "module" and "unit" to constituent elements used in the following description are added or mixed for the convenience of writing the description, and do not have meanings or roles distinguished from each other by themselves. In the description of the embodiments disclosed in the present specification, a detailed description thereof will be omitted when it is determined that a detailed description of a related known technology may obscure the gist of the embodiments disclosed in the present specification.

Throughout the specification, the term "connected (connected, contacted or coupled)" when a certain portion is referred to with another portion includes not only a case of "directly connected (connected, contacted or coupled)" but also a case of "indirectly connected (connected, contacted or coupled)" when another portion is interposed therebetween. In addition, when a certain component is described as being partially included (provided or installed), unless otherwise stated, it means that other components are also included (provided or installed) but not excluded.

The terminology used in the description herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Unless the context clearly differs, singular expressions may include plural expressions, and components of distributed implementations may be implemented in a combined manner if not particularly limited. In the present specification, terms such as "including" or "having" should be understood as not specifying the features, numerals, steps, actions, constituent elements, components, or combinations thereof described in the specification, but excluding the existence or possibility of addition of one or more other features, numerals, steps, actions, constituent elements, components, or combinations thereof.

The terms "first," "second," and the like used in the present specification include ordinal numbers and are used to describe various components, but the components are not limited to these terms. These are for the purpose of distinguishing one component from another component only. For example, a first component may be named as a second component, and a second component may be named as a first component similarly, without departing from the scope of the present invention.

Fig. 1 is a block diagram showing a schematic configuration of a system (hereinafter, referred to as a solar application system 100) for providing an electric power service to a target by a plurality of electric power consumers using an energy storage device applicable to an embodiment of the present invention, and fig. 2 is a diagram showing a detailed configuration of the solar application system 100 and a connection relationship thereof.

Referring to fig. 1 and 2, the solar energy application System 100 includes a solar power generation module 110, an Energy Storage System (ESS) 120, a controller 130, and a power consumer group selection unit 140.

The solar power generation module 110 is used to generate electric power using solar energy, and may be formed in a manner including more than one Photovoltaic (PV) module.

The energy storage system 120 stores the electric power generated by the solar power generation module 110, and the controller 130 controls the flow of the electric power generated by the solar power generation module 110 and the flow of the electric power stored in the energy storage system 120. The controller 130 may be implemented in a manner including specific components described below and additional devices (e.g., a computer, a smart phone, etc.) for controlling the components.

Specifically, the

controllers

130, 130 may include: a solar Power Conversion System (PCS) 131 including a solar inverter that converts dc Power generated by the solar Power generation module 110 into ac Power; a plurality of load side Power Conversion Systems (PCS) 132 including a unidirectional inverter that transmits electric energy stored in the energy storage System 120 to the load side and blocks the flow of electric energy on the load side to the energy storage System 120 side; and a Power Conversion System (PCS) 133 having a bidirectional inverter that transmits ac Power to the energy storage System 120 and transmits Power stored in the energy storage System 120 to the outside.

In addition, the solar power conversion system 131 may further include a solar detector for detecting the amount of electric energy generated by the solar power generation module 110, each of the load-side power conversion systems 132 may further include a load-side detector for detecting the amount of electric energy transmitted to the load side, and the energy storage system power conversion system 133 may further include an energy storage system 120 detector for detecting the amounts of electric energy stored in the energy storage system 120 and electric energy supplied from the energy storage system 120 to the outside.

The power consumer

group selection units

140 and 140 analyze the load pattern of the power consumers based on the information of the supplied power consumers to select a power consumer group including a plurality of power consumers on the load side, which are the supply targets of the electric energy stored in the

energy storage systems

120 and 120.

In more detail, the electricity consumer group selection unit 140 analyzes a load pattern of electricity consumers by time according to information of the electricity consumers that has been provided, and sets a kind of the electricity consumers as regular electricity consumers or irregular electricity consumers according to the analysis result, and the electricity consumer group may be formed to include one or more regular electricity consumers and irregular electricity consumers.

The electricity consumer group selecting unit 140 analyzes the load pattern of the electricity consumers by time based on the information of the electricity consumers that have been provided, and sets the type of the electricity consumers as daytime high-power electricity consumers, nighttime high-power electricity consumers, daytime specified electricity consumers, or specific-period high-power electricity consumers based on the analysis result.

The provided information of the electricity consumers may include at least one of a kind of the electricity consumers, a maximum power consumption amount of the electricity consumers, a minimum power consumption amount of the electricity consumers, a power consumption time of the electricity consumers, a location of the electricity consumers, and an electricity fee of the electricity consumers.

Referring to fig. 3 showing an example of a load pattern of power consumers applicable to an embodiment of the present invention, the power consumer group selection unit 140 may set a power consumer, which uses a large amount of power during the daytime, as a regular power consumer or a high-power daytime consumer, as in the load pattern sample a (301), and may set a power consumer, which uses a large amount of power during the nighttime, as a regular power consumer or a high-power nighttime consumer, as in the load pattern sample (302). In addition, the electricity consumer group selecting unit 140 may set electricity consumers having a large amount of electricity consumption in the day and night period as regular electricity consumers or day and night regulation electricity consumers like the load pattern sample C (303), and may set electricity consumers having a large amount of electricity consumption only in the specific period as irregular electricity consumers or high electricity consumers in the specific period like the load pattern sample D (304).

Thus, by using the solar application system 100, the power service provision target power consumer groups are grouped according to the power usage directions of the respective power consumers, and the application efficiency of the energy storage system can be improved.

Meanwhile, referring again to fig. 1 and 2, the solar power application system 100 may further include a power system 150 supplying power to an external system. Generally, in korea, the power system 150 supplies power provided by a korean power company.

The electric energy stored in the energy storage system 120 may flow to the power system through the bidirectional inverter through the controller 130 and be transmitted to the outside. Thus, the solar power application system 100 provides services to the electricity consumers, and sells the remaining electric energy of the energy storage system 120 to the electricity system 150, so that sales profits can be improved. In addition, since the unidirectional inverter is provided at the load side power consumer side, the general power used at the load side cannot be transmitted to the energy storage system, and thus all the electric energy stored in the energy storage system is obtained by the solar power generation of the solar power generation module 110, the sales profit can be maximized by using the solar utility system 100.

Fig. 4 is a diagram for explaining expected service information applicable to the embodiment of the present invention. Referring to fig. 4, the controller 130 receives expected service information corresponding to one of a peak load shaving service, a power quality service, and an uninterruptible power supply service from each of the plurality of power consumers, and can provide a service corresponding to the expected service information to each of the plurality of power consumers using the electric energy stored in the energy storage system 120.

In addition, the controller 130 checks real-time use power of the plurality of power consumers based on the target demand power information of the plurality of power consumers, the power generation amount information of the solar power generation module 110, the power stored in the energy storage system 120, and the current time information, and may provide the power generated by the solar power generation module 110 or the power stored in the energy storage system 120 to a specific power consumer when the real-time use power of the specific power consumer is greater than the use power based on the target demand power information of the specific power consumer.

The real-time power usage amount of the power consumer described in this specification refers to an estimated power usage amount of the power consumer during a prescribed time, the target required power amount refers to a power amount that has been set by the power consumer that the power consumer plans to use during the prescribed time, and the target reduced power amount refers to a set power amount that the power consumer plans to receive during the prescribed time and is associated with the system provider.

In general, the basic charge of the korean electricity rate is determined based on the peak value of the electricity used in the previous year, and thus the basic charge can be saved by lowering the peak value. For example, when the target required power is set to 1000KW by the consumer a, the controller 130 checks it, and when it is determined that the consumer a uses power greater than 1000KW, the consumer a may be supplied with electric energy generated by the solar power generation module 110 or electric energy stored in the energy storage system 120. Thus, the a-power consumer can obtain an effect of saving the basic cost of the electricity fee. This service is called a peak clipping and valley filling service.

In such a peak load shifting service, in the case where the power generation amount of the solar power generation module 110 is set to be equal to or greater than the used power on the load side during the daytime, the controller 130 may store the remaining power after supplying power to a specific power consumer using the power generated by the solar power generation module 110 in the energy storage system 120.

Further, when the State Of Charge (SOC) Of the energy storage system 120 is equal to or more than a predetermined ratio as the controller 130 stores the surplus electric energy in the electric energy generated by the solar power generation module 110 in the energy storage system 120, the controller 130 can transmit the electric energy stored in the energy storage system 120 to the power system 150 through the bidirectional inverter. Thus, the system operator can improve sales profits by selling electric power to the electric power system. The set percentage of the state of charge may be set to 80% or more or 100%, but is not limited thereto.

In addition, when the set amount of power generated by the solar power generation module 110 is smaller than the load-side power consumption during the daytime, the controller 130 may discharge the electric energy stored in the energy storage system 120 until the state of charge of the energy storage system 120 becomes a set percentage, and supply the electric energy to a specific electric power consumer, wherein the set percentage of the state of charge may be 20%, but is not limited thereto.

In this manner, when the real-time usage power of the specific power consumer is greater than the usage power of the specific power consumer based on the target demand power information, the system manager compares the power generation amount of the solar power generation module 110 at the set daytime with the usage power of the load side through the controller 130 to efficiently determine whether to supply the power generated by the solar power generation module 110 to the power consumer or to discharge the energy stored in the energy storage system 120 and use the power to the power consumer.

Fig. 5 is a sequential flowchart showing a method of providing a power service to a subject by a plurality of power consumers using an energy storage device applicable to an embodiment of the present invention, and fig. 6 is a diagram for explaining a detailed procedure of a service providing step of the method of providing a power service to a subject by a plurality of power consumers using an energy storage device applicable to an embodiment of the present invention.

The method of providing power service to a plurality of power consumers using the energy storage device applicable to the embodiment of the present invention is an application method using the solar application system 100 described above with reference to fig. 1 to 4, and therefore, a description overlapping with the above description will be omitted below.

Referring to fig. 5, the method for providing power service to a plurality of power consumers as objects using the energy storage device of the present embodiment uses a solar application system, which includes: a solar power generation module for generating electric energy by using solar energy; an Energy Storage System (ESS) that stores electric Energy generated by the solar power generation module; a controller that controls a flow of electric energy generated by the solar power generation module and a flow of electric energy stored in the energy storage system; and a power consumer group selection unit for selecting a service object power consumer group, wherein the application method of the solar energy application system comprises the following steps: an analyzing step s510, in which the electric power consumer group selecting unit analyzes the load mode of the electric power consumers according to the provided information of the electric power consumers; a power consumer group formation step s520 in which the power consumer group selection unit forms a power consumer group including a plurality of power consumers of the service object, based on the result of the analysis step; and a service providing step s530 in which the controller receives expected service information from each of the plurality of power consumers, and provides a service corresponding to the expected service information to each of the plurality of power consumers using the electric energy stored in the energy storage system.

The analyzing step s510 may be as follows: the electricity consumer group selection unit analyzes a load pattern of the electricity consumers by time according to the provided information of the electricity consumers, and sets the types of the electricity consumers as regular electricity consumers or irregular electricity consumers according to an analysis result. In this case, the power consumer group forming step s520 may be as follows: the electricity consumer group selecting unit forms the electricity consumer group to include more than one regular electricity consumers and irregular electricity consumers.

In addition, the analyzing step s510 may be the following steps: the electricity consumer group selection unit analyzes a load pattern of the electricity consumers by time according to the provided information of the electricity consumers, and sets the types of the electricity consumers as high-power electricity consumers in the daytime, high-power electricity consumers at night, regular electricity consumers in the daytime or high-power electricity consumers in a specific period of time according to the analysis result. In this case, the power consumer group forming step s520 may be as follows: the electricity consumer group selecting unit forms the electricity consumer group to include more than one daytime high-power electricity consumer and nighttime high-power electricity consumer, or to include more than one daytime specified electricity consumer and a specific time period high-power electricity consumer.

The expected service information may correspond to any one of a peak load clipping service, a power quality service, and an uninterruptible power supply service, and the provided information on the electricity consumers may include at least one or more of a type of the electricity consumer, a maximum amount of electricity used by the electricity consumer, a minimum amount of electricity used by the electricity consumer, a time period of electricity used by the electricity consumer, a location of the electricity consumer, and an electricity rate of the electricity consumer.

Referring to fig. 6, the service providing step s530 may include an electric energy providing step s610 in which the controller checks real-time use power of the plurality of power consumers according to target demand power information of the plurality of power consumers, power generation amount information of the solar power generation module, power information stored in the energy storage system, and current time information, and provides the specific power consumer with the electric energy generated by the solar power generation module or the electric energy stored in the energy storage system when the real-time use power of the specific power consumer is greater than the use power of the specific power consumer based on the target demand power information.

In addition, the service providing step s530 may further include a storing process s621 in which the controller stores electric energy remaining after the electric energy is supplied to the specific electricity consumer using the energy generated by the solar power generation module in the energy storage system when the amount of electricity generated by the solar power generation module is equal to or greater than the used electric power on the load side during the set daytime.

In this case, the system for providing an electric power service to a plurality of electric power consumers using the energy storage device may further include an electric power system for supplying electric power to an external system, and the service providing step s530 may further include a selling process s622 of transmitting the electric energy stored in the energy storage system to the electric power system so as to sell the electric power to the electric power system when the state of charge of the energy storage system is equal to or more than a predetermined ratio through a storing process s 621.

In contrast, the service providing step s530 may further include a discharging process s630, after s610, when the amount of power generated by the solar power generation module is less than the used power of the load side during the set daytime, the controller discharges the power stored in the energy storage system until the state of charge of the energy storage system becomes the set ratio and supplies the power to the specific power consumer.

In addition, the method for providing power service to a target by a plurality of power consumers using the energy storage device of the present embodiment may further include the functions and the sequence performed by the solar energy application system 100 described above with reference to fig. 1 to 4.

As described above, the peak clipping and valley filling service is a service for providing a power value, which is a difference between a peak value and a target required power, to a power consumer through an energy storage system when the peak value greater than the target required power of the power consumer occurs.

Referring to fig. 7, an embodiment of a method for providing a peak clipping and valley filling service using a solar application system applicable to an embodiment of the present invention will be described.

First, the target required power of N power consumers is calculated, and the amount of solar power generation of the solar power generation module is confirmed. And then monitoring the real-time use power of the N power users. For example, in the peak and valley clipping service providing method applicable to the embodiment of the present invention, when the real-time usage power P1 of power consumer No. 1 is greater than the target required power P1target of power consumer No. 1, the real-time usage powers P2, P3, P4, and … … of the remaining power consumers No. 2, No. 3, No. 4, and No. … … are compared with the target required powers P2 target, P3 target, P4 target, and … …, and it is determined which power consumers are to be provided with the peak and valley clipping service.

When the electricity consumer selection process is finished, the controller can calculate the power generation amount of the solar energy and the power value to be provided to the electricity consumer, and the peak clipping and valley filling service is executed by considering the electric quantity state of the energy storage system.

In addition, the peak load shifting service providing method of the present invention may further include a priority selection process to determine which power consumers are preferentially provided with power. The prioritization process may be implemented as follows, but is not limited thereto: preferentially supplying power to a power consumer having a large difference between the peak value and the target demand power; and providing the load shaving service to the electric power consumer after the charging amount of the energy storage system is increased when the state of charge of the energy storage system is 20% or less, and the like, while directly providing the load shaving service to the electric power consumer when the state of charge of the energy storage system is 50% or more. In addition, the peak load shifting service providing method may include a process of selling power remaining after the peak load shifting service is provided to the power system.

Fig. 8 to 10 are diagrams for explaining a Power Quality (PQ) service applicable to the embodiment of the present invention, and a Power Quality service providing method using a solar application system applicable to the embodiment of the present invention will be explained with reference to these diagrams.

First, the power quality service providing method performs the steps of: and determining the solar power generation amount of the solar power generation module and the electric quantity state of the energy storage system, and monitoring the main line load voltage and the load current by taking N power users as objects. The process may be a step of measuring the bus voltages V1, V2, … …, Vn of the

power consumers

1, 2, 3, … … and measuring the currents I1, I2, … …, In order to compensate for a Voltage Dip, which is one of the power qualities of the power consumers.

Next, in the power quality service providing method, when there is a difference in the parts of the production industry equipment of each power consumer that are sensitive to voltage fluctuation, the voltage fluctuation lower limit values V1 target, … …, and Vntarget of each power consumer are specified in advance, it is determined whether or not the bus voltage of the power consumer is equal to or less than the voltage fluctuation lower limit value, and if the voltage fluctuation lower limit values are small or equal, the step of performing the voltage fluctuation compensation service for the power consumer is performed.

Next, in the power quality service providing method, the following process may be performed: the power conversion system installed in each power consumer is operated, the rated current value of the power conversion system is increased to a predetermined value (for example, 10%), and the current value of the power conversion system is increased so that the bus voltage of the power consumer becomes equal to or higher than the voltage fluctuation lower limit value. When the system bus voltage of the power consumer returns to normal, it is determined whether or not there is an abnormality in the system, and all the procedures of the power quality service providing method can be terminated.

Referring to fig. 9, the load usage P of a specific power consumer is determined in a concentrated power consumer-intensive location such as an industrial park_loadWhen the voltage increases, the power supply of the system becomes insufficient. At this time, the bus voltage of the system drops (V ≦ V)_stable) The frequency also fluctuates, and therefore, the production equipment of the power consumer may malfunction.

Therefore, according to the present embodiment, when voltage compensation is performed on a specific power consumer by the energy storage system device, current is assisted by the energy storage system + the power conversion system, so that a margin is provided in the system supply capacity, and thus the bus voltage does not fluctuate and frequency fluctuation is compensated.

In addition, when the ground load of the power consumer is large, the phase lead current is supplied by the power conversion system, and the increase of the limit capacity of the system may be included in the power quality service. This can exert an effect similar to that of providing the phase advance capacitor.

In other words, an increase in power consumption of the electricity consumers located at the end of the system brings about a decrease in the system voltage. Therefore, it is a power quality service that compensates a load current by an energy storage system connected to a power consumer to reduce a power supply load of the system, thereby increasing a margin of the system to realize a principle of a system voltage. When the power factor of the power consumer is the ground power factor, the phase advance current is supplied through the power conversion system, and the surface current of the system is also reduced.

As explained with reference to fig. 9, fig. 10 shows the power factor improvement effect of the electricity consumer. Improving line current from I by power factor₀In is reduced by I. Thus, the power line loss is reduced by the line current in terms of the system, and the power system can be effectively utilized.

Referring to fig. 10, the loss reduction rate by providing the power conversion system for power quality service at the power consumer end is as follows.

Loss reduction rate

When the line resistance is R, the loss reduction rate is calculated and the line current reduction is improved based on the consumer power factor, and the reduction of the transmission line voltage is expressed by the following mathematical expression (E)_R: voltage at power receiving side, E_S: power supply side voltage R, X: the resistance and reactance of the line).

Voltage drop

Fig. 11 and 12 are diagrams for explaining a Uninterruptible Power Supply (UPS) service that can be applied to an embodiment of the present invention.

Fig. 11 is a flowchart showing a case where an uninterruptible power supply service is performed by an important device (ex: a computing load) or the like in a power consumer.

For example, the solar energy application system applicable to the embodiment of the present invention is used to monitor the bus voltage of the power consumer, and when the system fails, an Automatic Transfer Switch (ATS) is used to perform an automatic transfer operation, so that the power conversion system + the energy storage system applicable to the solar energy application system of the embodiment of the present invention can supply power to the power consumer.

Further, the uninterruptible power supply service providing method using the solar application system applicable to the embodiment of the present invention may include the steps of: the ATS resets and uses system voltage when the system is powered on, and provides service for recording time and electric quantity during power failure for the energy storage system operator and the electric power user side to perform post settlement.

Referring to fig. 12, the uninterruptible power supply service is a service for minimizing loss because a computer or a microprocessor-built-in device used in Office Automation (OA), Factory Automation (FA) is sensitive to voltage fluctuation or the like, and fig. 12 shows an example of a tie line for providing an uninterruptible power supply model.

Referring to fig. 12, in order to provide an uninterruptible power supply service, a DC Link bus applicable to a solar application system according to an embodiment of the present invention may be connected instead of a battery of an existing uninterruptible power supply.

Fig. 13 is a diagram for explaining matters that should be considered in order to provide power services to a power consumer according to an embodiment of the present invention.

When the real-time use power of the power consumer is higher than the target required power of the power consumer, the solar utility system 100 provides the power consumer with the target reduced power as described above, taking into consideration the following matters. For the sake of understanding, an example will be described in which the power generation amount of the solar power generation module is 10, and the target reduction power amount obtained by subtracting the target required power amount from the real-time power amount used by the power consumer is 8 to 12. The target required power of the electricity consumer is a required power set by the electricity consumer or a required power of the electricity consumer measured from past data, and the target reduced power is a value obtained by subtracting the target required power of the electricity consumer from the real-time electricity usage of the electricity consumer, and is an electricity amount that the solar application system needs to supply to the electricity consumer.

Referring to 1301 of fig. 13, since the generated power amount of the solar power generation module of the solar application system is 10 and the target reduction power amount is 8, the target reduction power amount can be supplied only by the generated power amount of the solar power generation module. At this time, the solar application system may sell or store 2 corresponding amounts of power generation in the energy storage system.

Referring to 1302 of fig. 13, when the real-time power consumption of the electricity consumer increases and the target reduction power of the electricity consumer is greater than the solar power generation power 10, the solar application system can provide the electricity consumer with the target reduction power by using the power stored in the energy storage system and the power generated by the solar power generation module together. As shown in 1302 of fig. 13, the target reduced electric power amount 12 is obtained by adding the electric power amount (-2) corresponding to 2 discharged from the energy storage system to the solar power generation electric power amount 10. However, even when the amount of electricity stored in the energy storage system and the amount of solar power generation are added and are less than the target reduction amount of electricity, the available supply power is calculated according to the embodiment of the present invention described below, and the calculated supply power can be supplied to the power consumer.

Fig. 14 is a block diagram showing a configuration of a power supply control system (hereinafter, referred to as "power supply control system 1400") that uses solar power generation according to an embodiment of the present invention, fig. 15 is a diagram for explaining a concept of the power supply control system 1400, and fig. 16 is a diagram for explaining the power supply control system 1400 and elements connectable thereto in more detail. As shown in fig. 16, the power supply control system 1400 is a system using the solar application system 100 described earlier with reference to fig. 1 to 12. Therefore, the power supply control system 1400 according to the embodiment of the present invention will be described below with reference to the solar application system shown in fig. 1, but the description of the overlapping contents with those described above will be omitted.

As shown in fig. 14, the power supply control system 1400 includes: a solar power generation amount prediction unit 1410 that predicts the power generation amount of the solar power generation module 110 based on the solar radiation amount data; a used power amount prediction unit 1420 that predicts a real-time used power amount of the power consumer from past power consumption data of the power consumer to be supplied with power; and a power supply control unit 1430 supplying power to the electricity consumer through the controller 130 when the real-time usage electricity amount of the electricity consumer is greater than the target demand electricity amount of the electricity consumer, based on the information of the electricity generation amount predicted by the solar electricity generation amount prediction unit 1410, the information of the real-time usage electricity amount of the electricity consumer predicted by the usage electricity amount prediction unit 1420, and the information of the electricity amount stored in the energy storage system 120.

Referring to fig. 15 for explaining the concept of the power supply control system 1400, as an embodiment of the power supply control system 1400, the power supply control system 1400 may predict the solar power generation amount the next day from the sunshine amount data, and may predict the power consumption of the power consumer the next day from the past power consumption data of the power consumer. In addition, the power supply control system 1400 can determine whether or not the power consumer needs to be supplied with the target reduction power, based on the predicted information and the battery information of the energy storage system on the day. When the power supply control system 1400 supplies the target reduced power, it supplies power to the power consumer when the power supply is sufficient, and notifies the power consumer in advance when the power supply is insufficient, or reduces the power consumption by the system itself, or transmits information that the supplied power can be supplied.

In addition, the power supply control unit 1430 may supply power to the electricity consumer using the power generated by the solar power generation module 110 when the amount of power generation is equal to or greater than a value obtained by subtracting the target required power amount from the real-time usage power amount, and may supply power to the electricity consumer using the power generated by the solar power generation module 110 and the power stored in the energy storage system 120 when the amount of power generation is less than a value obtained by subtracting the target required power amount from the real-time usage power amount and the sum of the amount of power generation and the power stored in the energy storage system 120 is equal to or greater than a value obtained by subtracting the target required power amount from the real-time usage power amount.

In one aspect, the power supply control system 1400 may further include a power supply calculating unit 1440, wherein the power supply calculating unit 1440 calculates that the power can be supplied to the power consumer when the sum of the generated power and the power stored in the energy storage system 120 is smaller than a value obtained by subtracting the target required power from the real-time used power. Thereby, the power supply control unit 1430 can supply the power supply calculated by the power supply calculation unit 1440 to the power consumer.

In an embodiment of the present invention, the electricity consumer is an electricity consumer group including a plurality of electricity consumers, and the used electricity amount prediction unit 1420 may predict the real-time used electricity amount of each of the plurality of electricity consumers based on past electricity consumption data of the plurality of electricity consumers. In addition, in the same example, the power supply control unit 1430 can supply power to the power consumers whose real-time power consumption amounts are larger than the target required power amount, based on the information of the power generation amount predicted by the solar power generation amount prediction unit 1410, the information of the real-time power consumption amounts of each of the plurality of power consumers predicted by the power consumption amount prediction unit 1420, and the information of the power amounts stored in the energy storage system 120. In the same example, when the sum of the generated power and the amount of power stored in the energy storage system 120 is smaller than a value obtained by subtracting the sum of the target required power amounts of the plurality of power consumers from the sum of the real-time usage power amounts of the plurality of power consumers, the power supply calculation unit 1440 may calculate the supply power that can be supplied to the plurality of power consumers, respectively, and the power supply control unit 1430 may supply the supply power calculated by the power supply calculation unit 1440 to the plurality of power consumers, respectively.

In addition, when the sum of the generated power and the power stored in the energy storage system 120 is smaller than a value obtained by subtracting the sum of the target power demands of the plurality of power consumers from the sum of the real-time power consumptions of the plurality of power consumers, the power supply calculation unit 1440 may calculate the power supply amount x that can be supplied to each of the plurality of power consumers by subtracting the target power demand from the real-time power consumption of each of the plurality of power consumers by the following equation (1).

X ═ (An/Y) × (K + S) formula (1)

In the above equation (1), An represents the set target reduced power amount for each of the plurality of power consumers, Y represents the sum of the set target power supply amounts for each of the plurality of power consumers, K represents the power amount stored in the energy storage system 120, and S represents the power generation amount.

For example, when the sum of the generated power and the amount of electricity stored in the energy storage system 120 is smaller than a value obtained by subtracting the sum of the target required electricity amounts of the a1 to A3 power consumers from the sum of the real-time used electricity amounts of the a1 to A3 power consumers, the supply power P1 that can be supplied to the a1 becomes a resultant value of { a1/(a1+ a2+ A3) } K + S, the supply power P2 that can be supplied to the a2 becomes a resultant value of { a2/(a1+ a2+ A3) } K + S, and the supply power P3 that can be supplied to the A3 becomes a resultant value of { A3/(a 867 + a2+ A3) } (K + S).

Fig. 17 is a diagram for illustrating a process of calculating the supply power according to an embodiment of the present invention.

Referring to fig. 17, when the sum of the generated power and the amount of power stored in the energy storage system 120 is smaller than a value obtained by subtracting the sum of the target required power amounts of the plurality of power consumers from the sum of the real-time power amounts of the plurality of power consumers, the power supply calculation unit 1440 may calculate the power rates of the respective power consumers corresponding to the amounts of power obtained by subtracting the values of the target required power amounts from the respective real-time power amounts of the plurality of power consumers, unlike the above-described calculation of the supplied power that can be supplied to the power consumers by the mathematical expression (1), and may calculate the supplied power that can be supplied to the plurality of power consumers, respectively, so that the sum of the power rates. The calculated supply power can be supplied to the power consumer by the power supply control unit 1430.

In other words, when the basic costs of the electricity consumption set for the electricity consumers a1 to A3 are a, b, and c, the electricity supply control system 1400 can preferentially supply electricity to the electricity consumer with the highest basic cost in order to minimize the loss amount.

For example, the loss amount Z of the electricity rate based on the target reduced power, which is a value obtained by subtracting the target required power from the real-time used power of the plurality of power consumers, may be calculated by the following equation (2).

Z ═ a (a-a ') + B (B-B ') + C (C-C ') equation (2)

Where a, B, and C are basic costs of the electricity usage amounts that have been set to the respective electricity consumers a1 to A3, A, B, C is the target reduction amount of electricity that has been set to a1 to A3 at first, and a ', B ', and C ' are the target reduction amounts of electricity that have been adjusted to a1 to A3, respectively. The amounts of electricity supplied to a1 to A3 were P1, P2, and P3, respectively.

In order to minimize the electricity charge for reducing the power according to the target, the power supply control system 1400 needs to set each numerical value to the minimum Z value. When a > b > c, the sequence shown in FIG. 17 can be used.

The power supply control system 1400 compares the sum of the amount of electricity K stored in the energy storage system 120 and the amount of electricity S generated by the solar power generation module 110 with a (S1701).

Next, the power supply control system 1400 supplies the sum of S and K P1 to a1 and does not supply power to a2 and A3 when the sum of S and K is equal to or less than a in step S1701. Wherein P1 corresponds to A'.

Next, the power supply control system 1400 determines whether or not a value obtained by subtracting the power P1 supplied to a1 from the sum of S and K is greater than B when the sum of S and K is greater than a in step S1701 (S1702).

Next, in the step S1702, when the value obtained by subtracting the power P1 supplied to a1 from the sum of S and K is equal to or less than B, the power supply control system 1400 supplies a corresponding amount of power a to a1, supplies the power a2 with the power remaining from the power obtained by subtracting the corresponding amount of power a from the sum of S and K, and does not supply power to A3. The remaining amount of electricity obtained by subtracting the amount of electricity corresponding to a from the sum of S and K corresponds to B'.

In addition, in the power supply control system 1400, in the step S1702, when the value obtained by subtracting the power P1 supplied to a1 from the sum of S and K is larger than B, a corresponding amount of power a is supplied to a1, a corresponding amount of power B is supplied to a2, and the amount of power remaining after subtracting P1 and P2 from the sum of S and K is supplied to A3. The amount of electricity obtained by subtracting the amounts of electricity of P1 and P2 from the sum of S and K is C'.

Unlike the above example, when the sum of the generated power and the amount of power stored in the energy storage system 120 is smaller than a value obtained by subtracting the sum of the target required power amounts of the plurality of power consumers from the sum of the real-time usage power amounts of the plurality of power consumers, the power supply calculation unit 1440 may calculate the supply power that can be supplied to the plurality of power consumers, respectively, so that the power rates corresponding to the power amounts obtained by subtracting the target required power amounts from the respective real-time usage power amounts of the plurality of power consumers are the same, and in this case, the following equation (3) may be used.

Z＝a(A-A')+b(B-B')

a(A-A')＝b(B-B')

S+K＝A'+B'

Math formula (3)

In the above equation (3), a and B are basic costs of the amount of electricity used that has been set to the electricity consumers a1 and a2, respectively, a and B are target reduced amounts of electricity that have been set to the electricity consumers a1 and a2, respectively, at first, and a 'and B' are target reduced amounts of electricity that have been adjusted to the electricity consumers a1 and a2, respectively. Z is the sum of the real-time use power sum of the power consumers a1 and a2 and the loss amount (electricity charge) caused by the sum of the target demand power greater than the sum of the power consumers a1 and a 2. The power supply control unit 1430 can supply the power users a1 and a2 with the supply powers a 'and B' calculated by the power supply calculation unit 1440 by the above equation (3), respectively, through the controller.

Fig. 18 is a flowchart showing the sequence of a power supply control method using solar power generation according to still another embodiment of the present invention, which is a method using the power supply control system 1400 described earlier with reference to fig. 13 to 17. Therefore, when the power supply control method using solar power generation according to the present embodiment is described below, the description overlapping with the above description will be omitted.

The power supply control method of the present embodiment uses a power supply control system using a solar application system including: a solar power generation module for generating electric energy by using solar energy; an Energy Storage System (ESS) that stores electric Energy generated by the solar power generation module; and a controller that controls a flow of electric energy generated by the solar power generation module and a flow of electric energy stored in the energy storage system, the power supply control method including: a prediction step s1810 in which the power supply control system predicts the power generation amount of the solar power generation module based on the solar radiation amount data, and predicts the real-time power consumption amount of the power consumer based on the past power consumption data of the power consumer to be supplied with power; a supply or non-supply judging step s1820 in which the power supply control system judges whether the real-time power consumption of the power consumer is greater than the target power demand of the power consumer; and a power supply step s1830 of supplying power to the electricity consumer through the controller according to the predicted information on the amount of power generation, the information on the amount of real-time power usage of the electricity consumer, and the information on the amount of power stored in the energy storage system when it is determined in the supply or non-supply determination step s1820 that the amount of real-time power usage of the electricity consumer is greater than the target required power amount of the electricity consumer.

The power supply step s1830 may be as follows: the power supply control system supplies power to the electricity consumer using the power generated by the solar power generation module when the power generation amount is equal to or greater than a value obtained by subtracting the target required power amount from the real-time power usage amount, and supplies power to the electricity consumer using the power generated by the solar power generation module and the power stored in the energy storage system when the power generation amount is less than a value obtained by subtracting the target required power amount from the real-time power usage amount and the sum of the power generation amount and the power stored in the energy storage system is equal to or greater than a value obtained by subtracting the target required power amount from the real-time power usage amount.

In addition, the power supply step s1830 may further include a power supply calculation process in which the power supply control system compares the sum of the generated power and the amount of power stored in the energy storage system with the real-time usage amount of power to the target required amount of power to calculate the supply power that can be supplied to the power consumer.

In addition, the electric power consumer may be an electric power consumer group composed of a plurality of electric power consumers, and in this case, the predicting step s1810 may be a step of: and the power supply control system predicts the power generation amount of the solar power generation module according to the sunshine amount data and predicts the respective real-time power consumption of the plurality of power consumers according to the past power consumption data of the plurality of power consumers. Also, in this case, the power supplying step s1830 may be a step of: and the power supply control system supplies power to the power consumers with the real-time electric quantity larger than the target required electric quantity according to the predicted electric quantity generation information, the respective real-time electric quantity utilization information of the plurality of power consumers and the information of the electric quantity stored in the energy storage system.

In addition, when the sum of the generated power amount and the amount of power stored in the energy storage system is smaller than a value obtained by subtracting the sum of the target required power amounts of the plurality of power consumers from the sum of the real-time usage power amounts of the plurality of power consumers, the power supply calculation process may be a process in which the power supply control system calculates the power supply amount x that can be supplied to each of the plurality of power consumers by subtracting the target required power amount from the respective real-time usage power amounts of the plurality of power consumers by the above equation (1).

In addition, when the sum of the power generation amount and the amount of power stored in the energy storage system is smaller than a value obtained by subtracting the sum of the target required amounts of power of the plurality of power consumers from the sum of the real-time usage amounts of power of the plurality of power consumers, the power supply calculation process may be a process of: the power supply control system calculates respective power rates corresponding to power amounts obtained by subtracting values of target required power amounts from respective real-time power amounts used by the plurality of power consumers, and calculates supply power that can be supplied to the plurality of power consumers respectively so as to minimize a sum of the respective power rates.

In addition, when the sum of the power generation amount and the amount of power stored in the energy storage system is smaller than a value obtained by subtracting the sum of the target required amounts of power of the plurality of power consumers from the sum of the real-time usage amounts of power of the plurality of power consumers, the power supply calculation process may be a process of: the power supply control system calculates supply power that can be supplied to the plurality of power consumers, respectively, so that respective power rates corresponding to power amounts obtained by subtracting a value of the target required power amount from respective real-time power amounts of the plurality of power consumers are the same.

The above description of the present invention is provided for illustration, and it should be understood that those skilled in the art to which the present invention pertains may easily modify other embodiments without changing the technical idea or essential features of the present invention. The embodiments described above are therefore to be considered in all respects as illustrative and not restrictive. The scope of the present invention is defined by the appended claims, and the meaning and scope of the claims should be construed to include all the modifications and variations derived from the equivalent concept.

Embodiments for carrying out the invention have been described in conjunction with specific embodiments.

Industrial applicability

The present invention relates to a power supply control using an energy storage device and solar power generation, which can be applied to solar power generation and a power supply control technology, and has industrial applicability because of its repeated implementation possibility.

Claims

1. A power supply control system that utilizes a solar energy application system, the solar energy application system comprising: a solar power generation module for generating electric energy by using solar energy; an Energy Storage System (ESS) storing electrical energy produced by the solar power generation module; and a controller that controls a flow of the electric energy generated by the solar power generation module and a flow of the electric energy stored in the energy storage system; characterized in that the power supply control system comprises:

the solar power generation amount prediction unit predicts the power generation amount of the solar power generation module according to the sunshine amount data;

a usage power amount prediction unit that predicts a usage estimation power amount of the power consumer during a prescribed time period, based on past power usage data of the power consumer to be supplied with power; and

and a power supply control unit that supplies the electric power stored in the energy storage system to the electric power consumer by the controller when the estimated amount of electric power used by the electric power consumer during a prescribed time is larger than a set amount of electric power that the electric power consumer plans to use during the prescribed time, based on the information of the amount of electric power generated predicted by the solar power generation amount prediction unit, the information of the estimated amount of electric power used by the electric power consumer during the prescribed time predicted by the used electric power amount prediction unit, and the information of the amount of electric power stored in the energy storage system.

2. The power supply control system according to claim 1,

the power supply control unit supplies power to the electricity consumer using the power generated by the solar power generation module when the amount of power generation is equal to or greater than a value obtained by subtracting the set amount of power scheduled to be used during the prescribed time from the estimated amount of power used during the prescribed time,

and supplying power to the electricity consumer using the electric power generated by the solar power generation module and the electric power stored in the energy storage system when the amount of electric power generated is less than the value obtained by subtracting the set amount of electric power planned to be used during the prescribed time from the estimated amount of electric power used during the prescribed time and the sum of the amount of electric power generated and the amount of electric power stored in the energy storage system is equal to or greater than the value obtained by subtracting the set amount of electric power planned to be used during the prescribed time from the estimated amount of electric power used during the prescribed time.

3. The power supply control system according to claim 1,

further comprising a power supply calculation unit that calculates supply power that can be supplied to the electricity consumer based on a specific reference when a sum of the amount of power generation and the amount of power stored in the energy storage system is smaller than a value obtained by subtracting a set amount of power scheduled to be used during the prescribed time from an estimated amount of power used during the prescribed time, the power supply control unit supplying the electricity stored in the energy storage system to the electricity consumer by an amount corresponding to the calculated supply power.

4. The power supply control system according to claim 3,

the power consumer is a power consumer group consisting of a plurality of power consumers,

the usage power amount prediction unit predicts usage estimation power amounts of each of the plurality of power consumers during a prescribed time from past power consumption data of the plurality of power consumers,

the power supply control unit supplies the power stored in the energy storage system for power whose usage estimated power amount during a predetermined time period is larger than a set power amount that is scheduled to be used during the predetermined time period, based on the information of the power generation amount predicted by the solar power generation amount prediction unit, the usage estimated power amount of each of the plurality of power consumers predicted by the usage power amount prediction unit during the predetermined time period, and the information of the power amount stored in the energy storage system,

the power supply calculation unit calculates power supplies that can be supplied to the plurality of power consumers, respectively, based on the specific reference when the sum of the power generation amount and the amount of power stored in the energy storage system is smaller than a value obtained by subtracting the sum of the set amounts of power that the plurality of power consumers plan to use during a prescribed time from the sum of the estimated amounts of power used by the plurality of power consumers during the prescribed time, and the power supply control unit supplies the plurality of power consumers with the power stored in the energy storage system in an amount corresponding to the calculated power supply, respectively.

5. The power supply control system according to claim 4,

when the sum of the amount of electricity generated and the amount of electricity stored in the energy storage system is less than a value obtained by subtracting the sum of the set amounts of electricity scheduled to be used by the plurality of electricity consumers during a prescribed time from the sum of the estimated amounts of electricity used by the plurality of electricity consumers during the prescribed time,

the power supply calculation unit calculates a power supply amount x that can be supplied to each of the plurality of power consumers by subtracting a value of a set amount of power planned to be used during a predetermined time from an estimated amount of power used during the predetermined time by each of the plurality of power consumers,

X＝(An/Y)*(K+S)

wherein An represents a set amount of power planned to be received during the prescribed time for each of the plurality of power consumers a1, a2, A3, … …, An, Y represents a sum of set amounts of power planned to be used during the prescribed time for each of the plurality of power consumers, K represents An amount of power stored in the energy storage system, and S represents the amount of power generated.

6. The power supply control system according to claim 4,

the power supply calculation means calculates respective power rates corresponding to power amounts obtained by subtracting values of set power amounts planned to be used for a predetermined time period from estimated power amounts used for the respective power consumers for the predetermined time period, and calculates supply powers that can be supplied to the respective power consumers so that the sum of the respective power rates is minimized.

7. The power supply control system according to claim 4,

the power supply calculation means calculates power supplies that can be supplied to the plurality of power consumers, respectively, so that the power rates of the power supplies are the same for power amounts obtained by subtracting a value of a set power amount, which is scheduled to be used during a predetermined time period, from an estimated power amount used during the predetermined time period by each of the plurality of power consumers.

8. A power supply control method using a power supply control system that utilizes a solar application system, the solar application system comprising: a solar power generation module for generating electric energy by using solar energy; an Energy Storage System (ESS) storing electrical energy produced by the solar power generation module; and a controller that controls a flow of electrical energy produced by the solar power generation module and a flow of electrical energy stored in the energy storage system, wherein the method comprises:

a prediction step in which the power supply control system predicts a power generation amount of the solar power generation module based on solar radiation amount data, and predicts an estimated power amount used by a power consumer during a predetermined time period based on past power consumption data of the power consumer to be supplied with power;

a supply or non-supply determination step in which the power supply control system determines whether or not the estimated amount of power used by the power consumer during a prescribed time is greater than a set amount of power that the power consumer is scheduled to use during the prescribed time; and

and a power supply step of supplying the electric power stored in the energy storage system to the electricity consumer through the controller based on information on the predicted power generation amount, information on the estimated amount of use of the electricity consumer during the predetermined time, and information on the amount of electricity stored in the energy storage system, when it is determined in the supply/non-supply determination step that the estimated amount of use of the electricity consumer during the predetermined time is larger than a set amount of electricity that the electricity consumer is scheduled to use during the predetermined time.

9. The power supply control method according to claim 8,

the power supply step comprises the following steps:

the power supply control system supplies power to the electricity consumer using the power generated by the solar power generation module when the amount of power generation is equal to or greater than a value obtained by subtracting the set amount of power planned to be used during the prescribed time from the estimated amount of power used during the prescribed time,

the power supply control system supplies power to the electricity consumer using the power generated by the solar power generation module and the power stored in the energy storage system when the amount of power generation is less than the value obtained by subtracting the set amount of power planned to be used during the prescribed time from the estimated amount of power used during the prescribed time and the sum of the amount of power generation and the amount of power stored in the energy storage system is equal to or greater than the value obtained by subtracting the set amount of power planned to be used during the prescribed time from the estimated amount of power used during the prescribed time.

10. The power supply control method according to claim 8,

the power supply step further includes a power supply calculation process in which the power supply control system compares a sum of the amount of power generation and the amount of power stored in the energy storage system with a value obtained by subtracting a set amount of power scheduled to be used during the prescribed time from the estimated amount of power used during the prescribed time, calculates supply power that can be supplied to the electricity consumer based on a specific reference, and supplies the electricity stored in the energy storage system to the electricity consumer by an amount corresponding to the calculated supply power.

11. The power supply control method according to claim 10,

the prediction step comprises the following steps: the power supply control system predicts a power generation amount of the solar power generation module based on solar radiation amount data, predicts an estimated power amount used by each of the plurality of power consumers during a predetermined time based on past power consumption data of the plurality of power consumers,

the power supply step comprises the following steps: the power supply control system supplies the electric power stored in the energy storage system to the electric power consumers whose usage estimated electric energy during the predetermined time is larger than the set electric energy scheduled to be used during the predetermined time, based on the information on the predicted amount of electric power generation, the information on the usage estimated electric energy during the predetermined time for each of the plurality of electric power consumers, and the information on the electric energy stored in the energy storage system.

12. The power supply control method according to claim 8,

the power supply calculation process comprises the following steps: the power supply control system calculates a power supply amount x that can be supplied to each of the plurality of power consumers by subtracting a value of a set amount of power planned to be used during a predetermined time from an estimated amount of power used during the predetermined time by each of the plurality of power consumers by the following equation,

X＝(An/Y)*(K+S)

13. The power supply control method according to claim 8,

when the sum of the amount of power generation and the amount of power stored in the energy storage system is smaller than a value obtained by subtracting the sum of the set amounts of power that the plurality of power consumers plan to use during a prescribed time from the sum of the estimated amounts of power that the plurality of power consumers use during the prescribed time, the power supply calculation process is the steps of:

the power supply control system calculates respective power rates corresponding to power amounts obtained by subtracting values of set power amounts planned to be used during a predetermined time period from estimated power amounts used during the predetermined time period by the respective power consumers, and calculates supply power that can be supplied to the respective power consumers so that the sum of the respective power rates is minimized.

14. The power supply control method according to claim 8,

when the sum of the amount of power generation and the amount of power stored in the energy storage system is smaller than a value obtained by subtracting the sum of the set amounts of power that the plurality of power consumers plan to use during a prescribed time from the sum of the estimated amounts of power that the plurality of power consumers use during the prescribed time, the power supply calculation process is a process of:

the power supply control system calculates power supply that can be supplied to each of the plurality of power consumers so that the power rates of the plurality of power consumers are the same, the power rates corresponding to power amounts obtained by subtracting a value of a set power amount that is scheduled to be used during a predetermined time period from an estimated power amount that is used during the predetermined time period by each of the plurality of power consumers.