KR101887347B1 - Method for virtual electric power trading between microgrids based on bidding way and agent apparatus for the same - Google Patents

Abstract

The present invention relates to a method of virtual power trading between microgrid and an agent apparatus therefor. According to a preferred embodiment of the present invention, a direct transaction intermediation system based microgrid inter-virtual-power-transaction agent apparatus comprises an information collector for collecting scheduling information from a plurality of micro-grids; And a mediating unit for rescheduling the collected scheduling information to select a microgrid for power trading. The present invention enables power trading between micro grids to benefit between micro grids that desire to sell power and micro grids that desire to purchase power.

Description

TECHNICAL FIELD [0001] The present invention relates to a virtual power trading method for a microgrid based on a direct transaction brokerage method, and an agent apparatus for the same. [0002]

The present invention relates to a method of virtual power trading between microgrid and an agent apparatus therefor.

The US Department of Energy (DOE) defines the Micro Grid as:

It is a single controllable entity for the grid as a group of 'consumers' and 'Distributed Energy Resources' (DERs) interconnected in a clearly defined electrical range, and is connectable and independent from the grid.

In other words, the micro grid is a localized power grid that connects the distributed energy resources (DER) of the customer, wind power, and solar power, and operates independently of the entire power system (off-grid) ), And is a power grid that can operate on-grid as needed.

However, the microgrid in the present invention is interpreted in a broader sense.

In the present invention, the microgrid may be any one of the following: i) a load cluster formed only by a load connected to a common connection point; ii) a power generation cluster formed only by a power generation source; and iii) a cluster having both a power generation source and a load. That is, the microgrid of the present invention can be in various forms. The microgrid of the present invention may include a unit for performing control operations in the microgrid. In the micro grid of the present invention, the load may be at least one of a controllable load and an uncontrollable load. In the micro grid of the present invention, the power generation source may be at least one of an output controllable power generation source and an output controllable power generation source. And, the microgrid of the present invention can include an energy storage device. There is no limitation on the number of loads and power sources belonging to the micro grid of the present invention.

Such a micro grid can be operated independently or in conjunction with the power system with control mechanisms such as optimal control, economic dispatch, and the like. Alternatively, the microgrid can be operated independently or in conjunction with the power system due to the accident and recovery of the power system. Or, in the context of economic dispatch, electricity trading between the microgrid and the utility grid can take place.

Korean Patent Laid-Open No. 10-2011-0034888 (April 4, 2011) Korean Patent Laid-Open No. 10-2016-0010789 (2016.01.28)

In an environment in which various types of micro grids exist, the present invention aims to provide a virtual power trading method between a micro grid that enables power trading between micro grids and an agent apparatus therefor.

According to another aspect of the present invention, there is provided an apparatus for inter-micro-grid virtual power trading agent, comprising: an information collecting unit for collecting scheduling information from a plurality of micro-grids; And a mediating unit for rescheduling the collected scheduling information to select a microgrid for power trading.

Here, the scheduling information may include a power generation schedule for each time slot, a load prediction value for each time slot, and a controllable load for each time slot.

The mediator may rescheduled to optimize the economical efficiency of the microgrid through power trading at a predetermined period.

In addition, the power trading can be performed through at least one of power generation amount control and load control.

Also, the mediating unit may provide the rescheduling result to the power grid micro grid, and determine that the power grid is concluded only when all the micro grids belonging to the power grid target micro grid are approved.

In addition, at least one of the intermediation fee and the network fee for the rewards generated in the power trading according to the rescheduling may be settled in any one of a fixed system and a fixed rate system.

According to an aspect of the present invention, there is provided a method for virtual-to-microgrid power trading based on a direct transaction brokerage method, comprising: collecting scheduling information from a plurality of microgrid; And selecting the microgrid for power trading by rescheduling the collected scheduling information.

Here, the scheduling information may include a power generation schedule for each time slot, a load prediction value for each time slot, and a controllable load for each time slot.

The rescheduling can be performed to optimize the economical efficiency through power trading between the selected micro grids.

In addition, the power trading can be performed through at least one of power generation amount control and load control.

Providing the rescheduling result to the power grid microgrid; And determining that the power trading is concluded only when the micro grid belonging to the power trading target micro grid is approved.

In addition, at least one of the intermediary fee and the network fee for the reward generated in the power transaction according to the rescheduling may be settled in any one of a fixed system and a fixed rate system.

The present invention enables power trading between micro grids to benefit between micro grids that desire to sell power and micro grids that desire to purchase power.

The present invention enables power trading between the microgrid in cooperation with the power trading market and the power grid.

The present invention allows micro grid operators to participate in the bidding and perform power trading between micro grids, thereby optimizing the economic efficiency of the micro grid.

The present invention re-establishes the operation plan of the controllable resources (power source, controllable load) in the micro grid to maximize economy through electricity trading between the micro grid, and operates the micro grid according to the re-established operation plan The economical efficiency of the micro grid can be maximized.

1 is a schematic diagram of a micro-grid inter-virtual power trading system in accordance with a preferred embodiment of the present invention.
2 is a functional block diagram of the agent apparatus of FIG.
3 is a flow chart for a virtual power trading process performed by the agent device of FIG.
4 is a schematic diagram of a bid-based microgrid inter-virtual power trading system.
5 shows an example of the bidding information provided by the MG agent apparatus.
6 shows an example of a settlement method of the settlement section.
Figure 7 is a flow chart of a virtual power trading process between the bidding method microgrid.
FIG. 8 is a schematic diagram of a virtual-power trading system between direct-deal brokerage microgrid.
Figure 9 shows an example of a virtual power trading between direct-to-mediate microgrid.
FIG. 10 shows an example of a settlement method in a virtual power trading between a direct deal brokerage microgrid.
FIG. 11 shows an example of a settlement method in a virtual power trading between a direct transaction brokerage microgrid.
FIG. 12 shows an example of a settlement method in a virtual power trading between a direct transaction brokerage microgrid.
Figure 13 is a flow chart of a direct-to-mediated microgrid-to-virtual power trading process.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Like reference numerals are used for like elements in describing each drawing. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, .

On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

Hereinafter, a microgrid inter-virtual power trading system according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings. 1 is a schematic diagram of a micro-grid inter-virtual power trading system in accordance with a preferred embodiment of the present invention. 2 is a functional block diagram of the agent apparatus of FIG.

1, a microgrid inter-virtual power trading system according to a preferred embodiment of the present invention includes a micro grid 100, a micro grid agent apparatus 200 (hereinafter referred to as "MG agent apparatus"), A power supplier 400, and a power trading market operator 500. The power supplier 400 may be a power supply company or a power supply company. The device on the micro grid 100, the MG agent device 200, the MG MI device 300, the power company 400 side device and the power trading market operator 500 (for example, the power exchange KPX) (Not shown). Here, the communication network may be any one of wired and wireless communication networks. And, the communication protocol may be unlimited. Various communication methods may be mixed. Also, a power line communication (PLC) scheme may be used. 1, at least one of the power company 400 and the power trading market operator 500 may be included in the microgrid inter-virtual power trading system of the present invention.

1 shows that the microgrid 100 and the MG agent apparatus 200 are hierarchically separated. Alternatively, the MG agent device 200 may be designed to belong to a system within a particular microgrid. That is, there may be a microgrid having an operating system including the functions of the MG agent apparatus 200. In this case, the MG agent apparatus 200 and the microgrid operating entity to which the MG agent apparatus 200 belongs may be different or the same.

The microgrid 100 in FIG. 1 may be any of the following: i) a load cluster formed only by a load connected to a common connection point ii) a generator cluster formed by only a generator, and iii) a cluster with both a generator and a load. That is, the microgrid of the present invention can be in various forms. The microgrid of the present invention may include a unit for performing control operations in the microgrid. In the micro grid of the present invention, the load may be at least one of a controllable load and an uncontrollable load. Further, in the micro grid of the present invention, the power source may be at least one of an output controllable load and an output controllable load. And, the microgrid of the present invention can include an energy storage device. In the microgrid of the present invention, there may be no limitation on the number of loads and power sources belonging to the microgrid. In FIG. 1, each of the plurality of micro-grids 100 may be any one of various micro-grid shapes defined by the present invention described above. Each of the plurality of micro-grids 100 may be electrically connected through a power grid (not shown). The grid can be a utility grid. And, a plurality of microgrid may belong to different distribution planes. And, the operating subject of the different distribution view may be different.

Each of the plurality of micro grids 100 may include a control unit capable of managing the microgrid in conjunction with the MG agent apparatus.

The MG agent apparatus 200 can manage power transactions of at least one microgrid 100, which is a lower node in terms of a communication architecture. The MG agent apparatus 200 may be plural. When there are a plurality of MG agent apparatuses 200, the operating subjects may be different from each other. The plurality of microgrids managed by the MG agent apparatus 200 may belong to the same distribution scheme, respectively, or may be different from each other.

A plurality of MG agent apparatuses 200 are managed by the MG MI apparatus 300, and may perform a virtual power trading-related operation in cooperation with the MG MI apparatus 300.

The micro-grid power trading performed by the MG agent device 200 is a virtual power trading concept, and there may be no physical limitation in power trading. In other words, when power is exchanged between microgrid, existing power grid interconnecting multiple microgrids can be used as is.

In addition, the power transaction proof in the micro-grid inter-power transaction performed by the MG agent apparatus 200 may be a concept of measurement based proof rather than physical direct transaction.

The micro-grid power transaction performed by the MG agent apparatus 200 can be performed by the MG agent apparatus 200 under the power market mechanism without going through the existing power market.

In addition, power exchange between various micro-grids can be performed through power exchange between the micro-grids performed by the MG agent device 200, and economical efficiency of each micro-grid object can be maximized through various micro-grid power transactions.

The MG agent apparatus 200 may integrate microgrid resources to enable the microgrid to participate in the power market through a power market intermediary (MG MI device in the present invention).

The economical efficiency of each microgrid object can be maximized through various microgrid power trading by scheduling of the MG agent apparatus 200.

In addition, microgrid resources can be integrated and the microgrid can participate in the power market through power market intermediaries (MG MI devices in the present invention).

Here, the power trading between the micro grid and the power market through the micro grid-based power trading and the MG agent apparatus 200 / MG MI apparatus 300 may be the concept of the metering amount-based power transaction proof.

An intermediary fee and a power grid fee may be added to the profit generating portion due to the power trading arbitration through the MG agent apparatus 200. [

The MG agent apparatus 200 can contribute to the weight and efficiency of the EMS (Energy Management System) in the microgrid 100 through the historical data management proxy of the microgrid 100 to be managed.

In the present invention, the MG MI 300 may play an integrated role in the power market transactions of the MG agent devices 200. In the present invention, the MG MI device 300 may act as a power market participant in the MG agent devices 200.

The MG MI device 300 may be operated singularly or plural. Rather than managing all the micro grids connected to the power network with one MG MI device 300, the integrated management of the MG MI device 300 through the plurality of MG agent devices 200 is efficient and new business area expansion and It is easy to develop. When the distribution business network is divided, it is preferable to manage it by a plurality of MG agent apparatuses 200. When a plurality of electric power companies operate distribution lines, it is preferable to manage them by a plurality of MG agent apparatuses 200. [

The MG MI device 300 may be operated by an operator of the separate MG MI device 300. Here, the operator of the MG MI device 300 may be a power company. The present invention does not limit the MG MI device 300 operator.

The MG MI device 300 of the present invention can store the transaction proof data of the MG agent device 200 that is interlocked with the MG MI device 300 and provide transaction proof data to the electric power company 400 and the power transaction market operator 500 .

The MG MI device 300 of the present invention can assist in the settlement of electric power charges of the micro grid through proof of the power transaction in cooperation with the utility charge settlement system.

The MG MI 300 of the present invention can interwork with the MG agent 200 and mediate the electricity market and the micro grid, and mediate the demand response market and the micro grid.

The MG MI 300 of the present invention develops a power bill system through historical data of micro grid resources managed by the MG agent apparatus 200 through interworking with the MG agent apparatus 200, A reaction system can be developed.

The MG MI device 300 of the present invention can perform virtual power trading among the microgrid 100, virtual power trading between the MG agent devices 200, power trading of the microgrid 100, Settlement of accounts, and settlement of charges. The MG MI device 300 collects the transaction proof data from the MG agent device 200 and provides it to the electric utility charge settlement system that cooperates with the MG MI device 300. The electric utility charge settlement system reflects the transaction proof data in the electric charge settlement . ≪ / RTI > The MG MI device 300 may provide the same day and real time power trading market information to the MG agent device 200. The MG MI 300 device may then provide the MG agent device 200 with the power trading market information the next day or after a predetermined time.

2, the MG agent apparatus 200 includes an information collecting unit 210, a mediating unit 220, an evidence data collecting unit 230, a settlement unit 240, and an evidence data providing unit 250 .

The information collecting unit 210 can collect the power transaction information from the micro grid 100 interlocked with each other. Here, the electric power transaction information may be any one of electric power sales information and electric power purchase information. The information collecting unit 210 may collect power purchase information from a micro grid that is intended to purchase electric power sales information as power transaction information from a micro grid to sell electric power. The power sale information may include power sale conditions (e.g., sales power, sales price, etc.). The power purchase information may include power purchase conditions (purchased power, sales price, etc.).

The intermediary 220 can determine whether the power trading can be concluded by referring to the power trading information. When the power purchase condition and the power sale condition match, the mediator 220 can determine that the power transaction between the micro grid providing the power sale condition and the micro grid providing the power purchase condition can be concluded. If the power purchasing condition and the power selling condition do not match, the mediating unit 220 can determine that the power contract is incomplete between the micro grid providing the power sales condition and the micro grid providing the power purchase condition. Convergence may mean that all of the mutual power trading conditions are met. For example, if the purchase price is equal to or greater than the selling price, it can be regarded as a match. If the price is matched but the amount of electricity purchased is larger than the amount of electricity sold, it can be regarded as a sum of the amount of electricity sold (that is, electricity trading is established).

The mediating unit 220 can determine whether or not the power supply can be concluded by the power sales condition or the power purchase condition when any one of the micro grid providing the power sales condition and the micro grid providing the power purchase condition is plural have. At this time, it may be determined whether or not the power trading can be concluded according to a predetermined priority (for example, a power trading information providing procedure).

The evidence data collection unit 230 may collect evidence from the microgrid to determine whether or not power trading has been normally performed between the microgrid with which the power transaction is concluded in accordance with the intermediary of the mediator 220. [ For example, the evidence may be a metric corresponding to the amount of electricity sold on the micro grid side to supply power according to the established power trading conditions. When the amount of sales power included in the established power trading condition and the amount of power supplied to the power grid by the micro grid to sell the power are equal, it is determined that the power trading according to the power trading condition is normally completed .

If it is determined that the power transaction is completed in the proof data collection unit 230, the settlement unit 240 can settle the gain generated by the power purchase condition and the power sale condition. The gain can be set based on the amount of profits the microgrid that sold the power receives. Or may be set based on the amount of profit received by the microgrid that purchased the power. Or may be set based on the benefit amount of both. For example, if the purchase price in the sales condition is 100 won and the purchase price in the purchasing condition is 150, if the conditions are matched and the power transaction is concluded, the gain amount according to the power transaction may be 50 won.

The settlement unit 240 may set a predetermined portion of the revenues as an intermediary fee. On the other hand, commission fees can be a cost that is proportional to the amount of electricity sold regardless of the gain. Then, the predetermined portion of the revenues can be used as a power grid fee. On the other hand, commission fees can be a cost that is proportional to the amount of electricity purchased, regardless of the gain. And, regardless of the gain, the cost that is proportional to the amount of electricity purchased can be the electricity cost of the grid. The settlement unit 240 can perform settlement of the utility fee with the electric power company 400. The settlement unit 240 can perform settlement of the brokerage commission according to the set contract condition with at least one of the micro grid that sold the power and the micro grid that purchased the power.

The evidence data providing unit 250 may provide the electric power company 400 or the power trading market operator 500 with proof of the fact that the electricity trading is normally performed. Here, the evidence may include the sales power of the microgrid that sold the power. Alternatively, the evidence may include the amount of power purchased by the microgrid that purchased the power. Alternatively, the evidence may include power trading parties (microgrid) information between the microgrid. Based on this evidence, the utilities can estimate the electricity price of the power buyer. For example, the electricity price may be calculated by subtracting the amount of power supplied by another power source from the other micro grid from the total amount of power supplied by the power buyer through the power grid. The evidence may be transmitted via the MG MI device 300.

Hereinafter, a micro-grid inter-virtual power trading method according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings. 3 is a flow chart for a virtual power trading process performed by the agent device of FIG. By the following description, the above-described configuration can be made more clear.

First, the information collecting unit 210 may collect the power transaction information from the micro grid 100 that interlocks with the power trading information (S31). Here, the electric power transaction information may be any one of electric power sales information and electric power purchase information. The information collecting unit 210 may collect power purchase information from a micro grid that is intended to purchase electric power sales information as power transaction information from a micro grid to sell electric power. The power sale information may include power sale conditions (e.g., sales power, sales price, etc.). The power purchase information may include purchase conditions (purchased power, sales price, etc.).

The intermediary 220 can determine whether the power trading can be concluded by referring to the power trading information (S32). When the power purchase condition and the power sale condition match, the mediator 220 can determine that the power transaction between the micro grid providing the power sale condition and the micro grid providing the power purchase condition can be concluded. If the power purchase condition and the power sale condition do not match, the mediator 220 may determine that the power purchase contract is incomplete between the microgrid providing the power sale condition and the microgrid providing the power purchase condition ( S33). The mediating unit 220 can determine whether or not the power supply can be concluded by the power sales condition or the power purchase condition when any one of the micro grid providing the power sales condition and the micro grid providing the power purchase condition is plural have. At this time, it may be determined whether or not the power trading can be concluded according to a predetermined priority (for example, a power trading information providing procedure).

The evidence data collection unit 230 may collect evidence from the microgrid to determine whether the power transaction has been normally performed between the microgrid in which the power transaction is concluded in accordance with the mediation of the mediator 220 (S34). For example, the evidence may be a metric corresponding to the amount of electricity sold on the micro grid side to supply power according to the established power trading conditions. When the amount of sales power included in the established power trading condition and the amount of power supplied to the power grid by the micro grid to sell the power are equal, it is determined that the power trading according to the power trading condition is normally completed .

If it is determined that the power transaction is completed in the proof data collection unit 230, the settlement unit 240 can settle the completed power transaction (S35). For example, the settlement unit 240 can settle the gain amount generated by the purchase condition and the sales condition. The gain can be set based on the amount of profits the microgrid that sold the power receives. Or may be set based on the amount of profit received by the microgrid that purchased the power. Or may be set based on the benefit amount of both. For example, if the purchase price in the sales condition is 100 won and the purchase price in the purchasing condition is 150, if the conditions are matched and the power transaction is concluded, the gain amount according to the power transaction may be 50 won.

The settlement unit 240 may set a predetermined portion of the revenues as an intermediary fee. On the other hand, commission fees can be a cost that is proportional to the amount of electricity sold regardless of the gain. Then, the predetermined portion of the revenues can be used as a power grid fee. On the other hand, commission fees can be a cost that is proportional to the amount of electricity purchased, regardless of the gain. And, regardless of the gain, the cost that is proportional to the amount of electricity purchased can be the electricity cost of the grid.

The evidence data providing unit 250 may provide at least one of the electric power company 400 and the power trading market operator 500 with proof of the fact that the electricity trading is normally performed at step S36. Here, the evidence may include the sales power of the microgrid that sold the power. Alternatively, the evidence may include the amount of power purchased by the microgrid that purchased the power. Alternatively, the evidence may include power trading parties (microgrid) information between the microgrid. Based on this evidence, the utilities can estimate the electricity price of the power buyer. For example, the electricity price may be calculated by subtracting the amount of power supplied by another power source from the other micro grid from the total amount of power supplied by the power buyer through the power grid. The evidence may be transmitted via the MG MI device 300.

S35 and S36 may be performed in the order different or concurrently. The order of S34 and S35 may be reversed.

Hereinafter, a case in which the micro-grid electric power trading proceeds in the above-mentioned virtual grid electric power trading system between micro grids will be described in detail.

In the bidding method, each microgrid performs the following roles and functions.

- The Micro Grid establishes a driving plan to optimize the cost function based on the cost function. For example, microgrid can build a driving plan to optimize economic efficiency based on cost function.

- Based on the results of the operation planning, the microgrid provides surplus (sales) power or required (purchased) power information (sales volume, purchase volume, sales or purchase bid price) to the MG agent device. Hereinafter, the sales power information and the purchase power information are collectively referred to as electric power transaction information. Hereinafter, the microgrid-side power trading information desired to be sold is referred to as a "power sale condition", and the microgrid-side power trading information desired to be purchased is referred to as "power purchase condition". The act of providing the power sale condition / power purchase condition to the MG agent device is collectively referred to as a bid. The calculation of the surplus (sales power) or the required (purchase) power on the operation plan can be performed automatically by the computing equipment in the microgrid or manually calculated by the operator.

- The amount of electricity purchased and the amount of electricity purchased under the electricity purchase conditions can be an integral multiple of the unit energy amount. In other words, the unit power amount (unit trading amount) may be a bid base unit. The unit power amount is kW *? T, where? T = {(T) - (T-1)}. For example, if ΔT is 15 minutes, the unit power amount can be 1 kW * 1 / 4h = 0.25 kWh. In this case, if the Micro Grid that wants to sell electricity makes 100 unit bids, the sales power may be 25 kWh. Hereinafter,? T may be a power sale unit time in a power sale condition, may be referred to as a power purchase unit time in a power purchase condition, and may be collectively referred to as a power transaction unit time.

- The electricity sales conditions may include sales time zone (T), sales electricity quantity (kWΔTs: where ΔTs is ΔT (electricity selling unit time) * integer), and electricity sales bid price.

- Power purchase conditions may include purchase time zone (T), purchased power (kWΔTb: where ΔTb is ΔT (power purchase unit time) * integer), and power purchase bid price.

- the bidding may be initiated at a pre-set minimum time (bid start time) (e.g., T-Tx (which may be equal to the power trading unit time, [Delta] T).

- The transaction may be concluded between the seller and the buyer with mutually agreeable terms, at a predetermined time after the start of the bid (bid deadline (T-ΔTy) (where ΔTy <ΔTx).

In the bidding method, each MG agent device performs the following roles and functions.

- The MG agent device can integrate microgrid bidding information. The MG agent device can mediate the power trading between EPs by providing a market system.

- The MG agent device receives bidding information from the microgrid, collects it, and provides it to the microgrid. This allows the operator of the microgrid participating in the bidding to understand the current status of the transaction. At this time, in addition to the bid information, the demand reaction price or the RTP price (Real Time Price) may be provided to the micro grid. Such information may be shared among the MG agent devices.

- The MG agent device enters into a transaction for the T time zone (time zone for sale / purchase) and can inform the micro grid. As a result, the microgrid that desires to sell the power can transmit the sales power to the power system at the time (T).

- The MG agent device can use the electric power transaction information to issue the contents to be used for the settlement of the electric power charge in the form of an evidence and store it. This evidence may be provided to the MG MI device or the utility. Proof of transaction may be an encrypted / non-modifiable document. As we have seen, the proof of the transaction can be metric. For this purpose, a precision instrument or a standardized instrument may be provided on the microgrid side.

Hereinafter, the bidirectional microgrid inter-virtual power trading system will be described with reference to FIGS. 4 and 6. FIG. Hereinafter, the description of the above-described items will be omitted or simplified. 4 is a schematic diagram of a bid-based microgrid inter-virtual power trading system. 5 shows an example of the bidding information provided by the MG agent apparatus. 6 shows an example of a settlement method of the settlement section.

Basically, the power trading system may include the micro grid 100, the MG agent apparatus 200, the MG MI apparatus 300, the power company 400, and the power market operator 500 as described above.

Here, the micro grid 100 may provide the MG agent apparatus 200 with the bid information (the above-mentioned electric power transaction information).

The MG agent apparatus 200 can provide the real time bidding status information and the transaction completion information to the micro grid 100. At this time, the bidding status information and the transaction completion information between the MG agent apparatuses can be shared. The MG agent apparatus 200 stores evidence (evidence) for proving whether or not the power sale has been performed according to the transaction condition when the transaction is concluded and transmits the proof to the MG MI apparatus 300, the electric power company 400, And / or the operator 500. The MG agent apparatus 200 can collect information necessary for issuing the evidence from the micro grid. For example, measurement information that can be used to verify that the sales power is transmitted to the power grid (the grid that electrically connects the micro grid and the operator may be the power company) at the time of sale, MG agent apparatus 200 can collect from the microgrid.

The MG MI device 300 receives market information such as RTP (Real Time Price) and DR information (Demand Response Information) from the electric power market operator and can provide it to the MG agent device 200. At this time, the MG agent apparatus 200 can provide RTP to the micro grid together with the bid information. The receiving microgrid can determine whether to engage in electricity trading with a power market operator or with another microgrid. The MG agent apparatus 200 receiving the DR information can provide the DR information to the microgrid so that the microgrid can participate in the DR market. Alternatively, when the MG agent apparatus 200 is in charge of the operation of the microgrid, the microgrid may be controlled by the microgrid to participate in the demand reaction market.

In the bidding method, the information collecting unit 210, the mediating unit 220, the evidence data collecting unit 230, the settlement unit 240, the evidence data providing unit 250, which are components of the MG agent apparatus 200, Will be described.

The information collecting unit 210 can collect the power transaction information from the micro grid 100 interlocked with each other. Here, the power transaction information may be any one of a power sale condition and a power purchase condition. The information collecting unit 210 may collect power purchase conditions from a micro grid that is intended to purchase electric power sales conditions as power transaction information from a micro grid to sell electric power. The electricity sales condition may include a sale time zone, a sales power amount, and a power sale bid price. The power purchase condition may include a purchase time zone, a purchased power amount, and a power purchase bid price. The power transaction information can also be collected through another MG agent apparatus 200. The virtual power transaction of the present invention may be performed between the microgrid managed by the single MG agent apparatus 200 or between the microgrid managed by the different MG agent apparatuses 200. [

The mediating unit 220 may collect the power transaction information collected in real time and provide it to the microgrid. When electric power is exchanged between the micro grids managed by different MG agent apparatuses 200, the electric power transaction information may be provided to another MG agent apparatus 200 as well.

The microgrid may automatically or manually adjust the bidding information to a predetermined bid deadline by referring to the power transaction information, and the adjusted bidding information (power transaction information) may be provided to the real-time MG agent apparatus 200. The bid start time and the bid deadline are as described above.

The brokerage unit 220 can determine whether or not the transaction is concluded when the bid closing time comes. At this time, the brokerage unit 220 can determine that the transaction is concluded when the bid conditions between the seller and the buyer are matched. In this case, when the bid conditions are completely matched (the same amount of power sales and power purchase amount) between the buyer and the seller based on the power sales amount and the power purchase amount, And the purchase amount is greater than the electric power sales amount). In this case, the power seller: the power buyer can be matched in the form of at least one of 1: n, n: 1 and m: n (m, n is an integer of 2 or more).

5 shows an example of bid information. The bidding information is described by the micro grid as follows. In Figure 5, the power sales volume / power purchase volume can be counted (or can be denoted) in bid units. In Fig. 5, the numerical value corresponding to the sales power amount may be an integer which is the sales power amount / unit power amount as a bid unit. In FIG. 5, the numerical value corresponding to the amount of purchased electricity may be an integer which is the amount of purchased electricity / unit electric energy as a bid unit. In FIG. 5, the price may be a unit quantity of electricity sales or a purchase price. The unit of price can be "won".

* MG 1: Electricity sales conditions (Electricity sales time zone: T, Electricity sales volume: Unit electricity amount * 100, Sales price: 100)

* MG 2: Electricity sales conditions (electricity sales time zone: T, electricity sales volume: unit electricity amount * 50, sales price: 100)

* MG 3: Power Purchase Conditions (Power Purchase Time: T, Power Purchased Quantity: Unit Electricity * 200, Purchase Price: 110)

* MG 4: Electricity sales conditions (electricity sales time zone: T, electricity sales volume: unit electricity amount * 200, sale price: 95)

* MGi: Power Purchase Conditions (Power Purchase Time: T, Power Purchase: Unit Electricity * 50, Purchase Price: 100)

* MGk: Electricity Purchase Conditions (Power Purchase Time: T, Electricity Purchased Quantity: Unit Electricity * 100, Purchase Price: 100)

* RTP: (purchase price: 90) (RTP may not be shown)

MG 1 to 4, MGi and MGk participate in the bid at T-ΔTx (bid start time), and the bidding order may be from left to right in the corresponding cell as shown in FIG.

The bidding was conducted during "ΔTx - Δty", and the bidding information can be continuously updated during that time.

FIG. 5 shows a result of a trade between the sellers MG1 and MG2 and the purchasers MGi and MGk, which satisfy the condition between the seller and the buyer on the basis of FIG. 5, which is the bid information determined at the bid deadline.

At this time, the transaction is concluded in the order of bidding.

Therefore, a transaction must be concluded between MG1 and MGi. However, the sales power is more than the purchased power. Therefore, the mediating unit 220 can determine that some transactions are established (50 out of 100 power purchase amounts) based on the power trading amount.

The mediating part 220 can judge that the sales price for the 100 MGi to be sold by MG1 is limited and the remaining 50 is sold to MGk.

At this time, the mediator 220 can determine that MGk purchases 50 of the 100 MG1 purchased from the MG2, excluding 50 purchased, from the MG2. In this manner, the intermediate unit 220 can determine whether all or a part of the transactions are concluded in the bid order at mutually matched prices.

The intermediary 220 may determine whether the transaction is to be concluded, and may transmit the result of the transaction concluding determination to the participating microgrid.

The evidence data collection unit 230 may collect evidence from the microgrid to determine whether or not power trading has been normally performed between the microgrid with which the power transaction is concluded in accordance with the intermediary of the mediator 220. [ For example, the evidence may be a metric corresponding to the amount of electricity sold on the micro grid side to supply power according to the established power trading conditions. When the amount of sales power included in the established power trading condition and the amount of power supplied to the power grid by the micro grid to sell the power are equal, it is determined that the power trading according to the power trading condition is normally completed .

If it is determined that the power transaction is completed in the evidence data providing unit 250, the settlement unit 240 can settle the gain generated by the power purchase condition and the power sale condition. On the other hand, when a transaction is concluded, it is possible to settle the gain on the transaction.

The settlement unit 240 may set a predetermined portion of the revenues as an intermediary fee. On the other hand, commission fees can be a cost that is proportional to the amount of electricity sold regardless of the gain. Then, the predetermined portion of the revenues can be used as a power grid fee. On the other hand, commission fees can be a cost that is proportional to the amount of electricity purchased, regardless of the gain. And, regardless of the gain, the cost that is proportional to the amount of electricity purchased can be the electricity cost of the grid. The settlement unit 240 can perform settlement of the utility fee with the electric power company 400. The settlement unit 240 can perform settlement of the brokerage commission according to the set contract condition with at least one of the micro grid that sold the power and the micro grid that purchased the power.

6 is an example of a settlement method of the settlement unit. In FIG. 6, the basic unit of bid is as described above.

First, a description will be given of a method for calculating a charge for use of a power grid.

The settlement method may be a fixed rate method or a fixed amount method.

In the case of the fixed rate method, the power usage fee can be calculated according to the following equation.

For example, if the bid unit of the amount of sales electricity with which the transaction is concluded is 100, the unit cost of electricity sales (or purchase cost) is 100 Yuan, and the network fee rate is 1%, the electricity bill for the network may be 100 Yuan.

On the other hand, in the case of a fixed imputation method, the power usage fee can be calculated according to the following equation.

For example, if the bidding unit of the amount of sales electricity with which the transaction is concluded is 100, the unit cost of electricity sales cost (or purchase cost) is 100 won, and the predetermined unit usage amount is 0.001, the power consumption cost of the power network may be 10 won.

Hereinafter, the method of calculating the power trading commission fee will be described.

The settlement method may be a fixed rate method or a fixed amount method.

In the case of the fixed rate method, the brokerage fee can be calculated according to the following equation.

For example, if the bid unit of the amount of sales electricity with which the transaction is concluded is 100, the unit cost of electricity sales cost (or purchase cost) is 100 won, and the commission fee rate is 1%, the commission fee may be 100 won.

Alternatively, according to the fixed imputation method, the brokerage fee can be calculated according to the following equation.

For example, if the bidding unit of the amount of sales electricity with which the transaction is concluded is 100, the selling cost of the unit amount of electricity (or purchase cost) is 100 won, and the predetermined unit brokerage fee is 0.001, the brokerage fee may be 10 won.

The settlement unit 240 may determine that the transaction has been concluded by the broker 220 or that it has been determined that the transaction is completed by the proof data collection unit 230 and that the power usage fee and / And calculate it. The settlement unit 240 can settle the settlement with the power company directly or via the MG MI unit 300. [

The evidence data providing unit 250 can issue and manage the evidence of the corresponding power transaction based on the evidence collected by the evidence collection unit 230. Evidence can be used as a basis for estimating the electricity price of a power buyer. Accordingly, the settlement unit 240 may provide the management certificate to the electric power company 400 or the electric power market operator 500 directly or via the MG MI unit 300 in order to reflect the electric power transaction result when calculating the electric power charge can do. When the collection of the evidence data is completed, the MG agent apparatus 200 can judge that the transaction is completed.

Hereinafter, with reference to FIG. 7, a description will be given of a virtual power trading method between the bidding system microgrid. Hereinafter, the description of the above-described items will be omitted or simplified. By the following description, the above-described configuration can be made more clear. Figure 7 is a flow chart of a virtual power trading process between the bidding method microgrid.

First, a bid can be initiated. When the bid start time is set to T-ΔTx (T is the power sale time zone or the power purchase time), the power transaction information corresponding to the power sale or power purchase at the time T or the same time as or after the time T- When collected by unit 210, a bid can be initiated (S61).

After S61, the power trading information corresponding to the T time zone in real time (in other words, the power sale condition corresponding to the sale of the power in the T time zone, the power purchase condition corresponding to the purchase of the power in the T time zone) (Step S62).

Here, the power transaction information may be any one of a power sale condition and a power purchase condition. The information collecting unit 210 may collect power purchase conditions from a micro grid that is intended to purchase electric power sales conditions as power transaction information from a micro grid to sell electric power. The electricity sales condition may include a sale time zone, a sales power amount, and a power sale bid price. The power purchase condition may include a purchase time zone, a purchased power amount, and a power purchase bid price. The power transaction information can also be collected through another MG agent apparatus 200.

The information collecting unit 210 may sort the collected power transaction information and provide the bidding information as shown in FIG. 5 to the participating microgrid (S63). When electric power is exchanged between microgrids managed by different MG agent apparatuses 200, the electric power transaction information (bidding information) may be provided to another MG agent apparatus 200 as well.

The information collecting unit 210 may determine whether or not a bid deadline has arrived (S64). As described above, the bid closing time may be a time before a preset time in the electricity sales time zone T or the electricity trading time zone T. [

In S64, if it is determined that the bid deadline has come, the information collecting unit 210 may continuously collect the power transaction information until the bid deadline, and provide the bid information to the microgrid participating in the bid (S62, S63, S64). The microgrid may automatically or manually adjust the bid information to a predetermined bid deadline by referring to the power transaction information and provide the adjusted bid information (power transaction information) to the real-time MG agent apparatus 200. [

If it is determined in S64 that the bid deadline has arrived, the brokerage unit 220 can determine whether the transaction is concluded (S65). Whether the transaction is concluded may be determined in the order of bidding. At this time, it may be determined based on the power seller and may be determined based on the power buyer. The brokerage unit 220 can determine that the transaction is concluded if the bid conditions between the seller and the buyer are matched. In this case, when the bid conditions are completely matched (the same amount of power sales and power purchase amount) between the buyer and the seller based on the power sales amount and the power purchase amount, And the purchase amount is greater than the electric power sales amount). In this case, the power seller: the power buyer can be matched in the form of at least one of 1: n, n: 1 and m: n (m, n is an integer of 2 or more). The method of judging whether a transaction is concluded is as described above.

The determination result of S65 may be provided to the microgrid participating in the bid (S67).

The proof data collection unit 230 may collect the proof data of the power transaction based on the result of the determination of whether to conclude the transaction (S67). The evidence data collection unit 230 may collect evidence from the microgrid to determine whether or not power trading has been normally performed between the microgrid with which the power transaction is concluded in accordance with the intermediary of the mediator 220. [ For example, the evidence may be a metric corresponding to the amount of electricity sold on the micro grid side to supply power according to the established power trading conditions. When the amount of sales power included in the established power trading condition and the amount of power supplied to the power grid by the micro grid to sell the power are equal to each other, it is determined that the power trading according to the power trading condition is completed .

Then, the settlement unit 240 can perform the settlement for the power transaction concluded at S65 (S68). If it is determined that the power transaction is completed in the evidence data providing unit 250, the settlement unit 240 can settle the gain generated by the power purchase condition and the power sale condition. On the other hand, when a transaction is concluded, it is possible to settle the gain on the transaction. The settlement unit 240 may set a predetermined portion of the revenues as an intermediary fee. On the other hand, commission fees can be a cost that is proportional to the amount of electricity sold regardless of the gain. Then, the predetermined portion of the revenues can be used as a power grid fee. On the other hand, commission fees can be a cost that is proportional to the amount of electricity purchased, regardless of the gain. And, regardless of the gain, the cost that is proportional to the amount of electricity purchased can be the electricity cost of the grid. The settlement unit 240 can perform settlement of the utility fee with the electric power company 400. The settlement unit 240 can perform settlement of the brokerage commission according to the set contract condition with at least one of the micro grid that sold the power and the micro grid that purchased the power. Details of the settlement method are as described above.

Then, the evidence data providing unit 560 may provide the power transaction proof data to the MG MI apparatus 300, the electric power company 400, and the electric power market operator 500 (S69). The settlement unit 240 may determine that the transaction has been concluded by the broker 220 or that it has been determined that the transaction is completed by the proof data collection unit 230 and that the power usage fee and / And calculate it. The settlement unit 240 can settle the settlement with the power company directly or via the MG MI unit 300. [

The evidence data providing unit 250 can issue and manage the evidence of the corresponding power transaction based on the evidence collected by the evidence collection unit 230. Evidence can be used as a basis for estimating the electricity price of a power buyer. Accordingly, the settlement unit 240 may provide the management certificate to the electric power company 400 or the electric power market operator 500 directly or via the MG MI unit 300 in order to reflect the electric power transaction result when calculating the electric power charge can do. When the collection of the evidence data is completed, the MG agent apparatus 200 can judge that the transaction is completed. The above-described method may be performed in a different order. For example, S67 and S68 may be performed at the same time, or the order may be reversed.

Hereinafter, a virtual-power trading system between the micro-grid for the direct transaction intermediation will be described with reference to FIG. 8 to FIG. Hereinafter, the description of the above-described items will be omitted or simplified. FIG. 8 is a schematic diagram of a virtual-power trading system between direct-deal brokerage microgrid. Figure 9 shows an example of a virtual power trading between direct-to-mediate microgrid. FIG. 10 shows an example of a settlement method in a virtual power trading between a direct deal brokerage microgrid. FIG. 11 shows an example of a settlement method in a virtual power trading between a direct transaction brokerage microgrid. FIG. 12 shows an example of a settlement method in a virtual power trading between a direct transaction brokerage microgrid.

The MG agent apparatus 200 can use the schedule information of the micro grid 100 to mediate the power trading so that the economical efficiency of each micro grid is optimized.

The MG agent apparatus 200 may serve as an optimizer of the microgrid 100 to be managed.

The MG agent apparatus 200 can maximize the economical efficiency of the individual microgrid 100 through the process of acquiring the information of each microgrid 100 and rescheduling the scheduling of the power generation and controllable load. Here, the power generation may be a combination of an output controllable distributed power source (e.g., a fuel cell), an output uncontrollable distributed power source (e.g., wind power generation, solar power generation, etc.) and an energy storage device.

The MG agent apparatus 200 receives scheduling information (time-series power generation schedules Pg1 (T-DT), Pg1 (T), Pg1 (T + DT) (T + DT), PL1 (T), PL1 (T + DT), PL1 ) ..}) can be collected. At this time, the MG agent apparatus 200 can collect scheduling information directly from the microgrid or through another MG agent apparatus 200. [

The MG agent apparatus 200 performs rescheduling and can receive authentication by presenting the sales / purchase amount to the seller and the buyer at the time of T-AT.

The MG agent apparatus 200 can conclude a transaction in the order of receipt (authentication) when the seller and the buyer authenticate the sales / purchase amount presented within the T-2? T period.

The MG agent apparatus 200 can directly mediate the power direct transactions between micro grids through rescheduling of the micro grid resources.

The MG agent apparatus 200 can directly mediate the power transaction with the demand reaction market through the rescheduling of micro grid resources and the power trading market such as RTP.

The MG agent apparatus 200 can mediate a transaction by exchanging information between MG agent apparatuses.

The MG agent apparatus 200 can issue proofs of the contents to be used for the subsequent electric power bill settlement using the electric power transaction results and can store them. The MG agent apparatus 200 may provide this information to the MG MI apparatus 300, the electric power company 400, and the electric power market operator 500. Proof of transaction may be stored as an encrypted / non-modifiable document. Transactions can be documented on a metric basis. For this purpose, precision measurement technology and standardized measurement method can be applied.

8, fundamentally, the power trading system includes the micro grid 100, the MG agent apparatus 200, the MG MI apparatus 300, the electric power company 400, the electric power market operator 500, .

The microgrid 100 may provide scheduling information (information including power generation and / or load planning of each micro grid) to the MG agent apparatus 200 as power transaction information.

The MG agent apparatus 200 can reschedulances the operation plan of each microgrid such that the economical efficiency of the microgrid is optimized through power trading with a predetermined period (for example, every day, hour, etc.). The MG agent apparatus 200 can select at least two micro grids and reschedule each of the micro grids through the power trading (including load control) so that the economics of each of the selected micro grids are optimized have. The MG agent apparatus 200 repeats the rescheduling work for the entire microgrid to be managed, and mediates electricity trading between the microgrid (power trading target microgrid) combination, which is determined to have the highest economical efficiency as a result of the power transaction have. At this time, the MG agent apparatus 200 can provide rescheduling information to the power grid microgrid. When providing the rescheduling information, the selling price and the purchase price may be provided together. If the EMS in the micro grid automatically or by the operation of the operator of the micro grid manually grants the rescheduling information to all of the power grid micro grids, the power trading can be concluded between the power grid micro grids. When the power trading is concluded, the power grid microgrid can be operated according to the rescheduling information.

The MG agent apparatus 200 may collect the information necessary for issuing the EV for the power transaction from the micro grid where the power transaction is concluded. For example, in the rescheduling information, measurement information that can be used to verify that the sales power is transmitted to the power grid (the grid that electrically connects the micro grid and the operator may be the power company) The MG agent apparatus 200 can collect from the microgrid. Alternatively, when load control is included in the contents of the power transaction, the MG agent apparatus 200 may acquire the measurement information on the load control amount as information necessary for issuing the evidence.

The MG MI device 300 receives market information such as RTP (Real Time Price) and DR information (Demand Response Information) from the electric power market operator and can provide it to the MG agent device 200. At this time, the MG agent apparatus 200 can provide RTP to the microgrid together with rescheduling information. The receiving microgrid can determine whether to engage in electricity trading with a power market operator or with another microgrid. The MG agent apparatus 200 receiving the DR information can provide the DR information to the microgrid so that the microgrid can participate in the DR market. Alternatively, when the MG agent apparatus 200 is in charge of the operation of the microgrid, the microgrid may be controlled by the microgrid to participate in the demand reaction market.

Hereinafter, in the direct transaction intermediation system, the information collecting unit 210, the mediating unit 220, the evidence data collecting unit 230, the settlement unit 240, the evidence data providing unit 250 Will be described.

The information collecting unit 210 can collect the power transaction information from the microgrid 100 to be managed. The information collecting unit 210 may collect operating schedule information of each microgrid 100 as power transaction information. (T-DT), PL1 (T), and Pg1 (T + DT) , PL1 (T + DT), and time-based controllable load {Pl1 (T-DT), P1 (T), Pl1 (T + DT). Since the microgrid operation schedule may vary in real time, the information collection unit 210 may collect the microgrid operation schedule in real time.

The mediating unit 220 may reschedulances the operation plan of each microgrid such that the economy of the microgrid is optimized through power trading at a predetermined period (for example, every day, hour, etc.). The mediator 220 selects at least two microgrids and provides an operating plan for each of the microgrids to optimize the economics of each of the selected microgrids through power trading (including power generation control and / or load control) Can be rescheduled. The mediator 220 repeats this rescheduling operation for the whole of the microgrid to be managed, so that the microgrid (power trading subject microgrid) combination, which is determined to have the highest economical efficiency as a result of power trading, And a grid). The mediating unit 220 may provide rescheduling information to the power trading target microgrid. When providing the rescheduling information, the selling price and the purchase price may be provided together. It is possible to determine whether or not the economical efficiency is optimal in rescheduling. The relay unit 220 can select a combination that is economically optimal as a result of rescheduling through power trading among microgrids to be managed. At this time, the microgrid corresponding to the selected combination is a microgrid for power trading. The relay unit 220 may provide rescheduling results to the selected power trading microgrid.

Figure 9 shows an example of rescheduling for power trading. Figure 9 is an example of rescheduling for power trading between microgrid #i and microgrid #j.

In FIG. 9, Original Scheduling indicates an operation schedule collected from the micro grid by the relay 220, and Re-Scheduling indicates that the Original Scheduling is rescheduled to optimize the economical efficiency of the micro grid #i and micro grid #j.

The relaying unit 220 can perform rescheduling such that the gain between the micro grid #i and the micro grid #j is maximized in consideration of the electric power charge, the power generation cost, and the like.

9, the relay 220 shifts the generation amount of the time zone "4 " of the micro grid #i to the time zone" 6 "Quot; 6 "to the micro grid #j in the time zone" 6 ". Referring to FIG. 10, since the operating cost of the micro grid #i is decreased by "150" while the operating cost of the micro grid #i is increased by "100", the operation cost of the micro grid # A gain of "50" The numerical value here may be a numerical value according to a predetermined unit. For example, the predetermined unit may be "circle ".

The relay unit 220 can determine the transaction price while selecting the power grid micro grid combination. At this time, the transaction price can be determined in a structure that benefits both seller / buyer / agent. At this time, the power sale price may be " operating cost difference due to rescheduling + gain ", and the power purchase price may be "operating cost difference due to rescheduling-gain. Referring to the power sale price and the power purchase price, the microgrid can determine whether to sell or purchase the power.

10 is an example of a pricing structure, in which a gain of a seller / buyer is determined first. At this time, the gain of the seller / buyer is determined in the same manner.

In FIG. 10, since the gain through power transaction (rescheduling) between two micro-grids is "50 ", the gain can be distributed equally to the seller / buyer by" 25 ".

Electricity charges for the power grid and commission fees for power trading may be imposed as a flat or fixed rate charge. This can be similar to the previous bidding method. The brokerage fee may be collected from both the seller and the buyer or from one side.

According to the constant rate charging method, the power grid fee may be charged according to the following equation (5).

For example, if the sales unit of the sales amount of the contracted transaction is 100, the sales amount of the unit amount of electricity is 100 Yuan, and the network usage rate is 1%, the electricity bill for the network may be 100 Yuan.

According to the fixed rate method, a relay fee may be charged according to the following equation (6).

For example, if the selling unit of the sales amount of the transaction is 100, the selling amount of the unit amount of money is 100 Yuan, and the brokerage commission rate is 1%, the brokerage fee may be 100 Yuan.

On the other hand, in the case of the fixed payment method, the power grid fee can be calculated according to the following Equation (7).

For example, if the selling unit of the sales amount of the transaction is 100, the selling amount of the unit amount of money is 100 won, and the predetermined unit usage amount is 0.001, the usage fee of the power supply network may be 10 won.

If it is based on the fixed imputation method, the brokerage fee can be calculated according to the following equation (8).

Alternatively, as in FIG. 11, the price may be determined by the seller / buyer / mediator same gain method.

In Fig. 11, since the gain generated through power trading between two micro-grids is "50 ", it can be distributed by" 50/3 " to both sellers / buyers / intermediaries. At this time, the power usage fee of the power network can be determined by the above-mentioned fixed rate / fixed rate charging method, and the electricity fee for the power network can be paid by the intermediary. Then, according to the distribution result, the power sale cost and the power purchase cost can be determined. At this time, the power sale price may be " operating cost difference due to rescheduling + gain ", and the power purchase price may be "operating cost difference due to rescheduling-gain.

Unlike the above, as in FIG. 12, the seller / buyer gain may be cum. In addition, the amount of the seller / buyer's gain in the total revenues may be the brokerage fee.

FIG. 12 illustrates a case in which the gain due to the power transaction is "50", and the seller and the buyer have a semiconduct gain of "10". At this time, the power usage fee of the grid can be estimated by the fixed / fixed rate method.

The mediator 220 may provide a rescheduling result to the power trading target microgrid at T-ΔT, where T is the starting point of the rescheduling target time zone in the microgrid operating schedule. At this time, the brokerage unit 220 can present the sales / purchase amount to the seller and the buyer.

The mediator 220 can determine that the power transaction has been concluded when the approval is received within the T-2? T from all of the micro-grids forming the combination in which the economic efficiency becomes optimal. The relay unit 220 can notify the microgrid of the power trading target whether or not the power trading is concluded.

The evidence data collection unit 230 may collect evidence from the microgrid to determine whether or not power trading has been normally performed between the microgrid with which the power transaction is concluded in accordance with the intermediary of the mediator 220. [ For example, the evidences are based on the sales amount of electricity on the micro grid side, which is supposed to supply electric power in accordance with the established power trading conditions (i) the amount of electricity transmitted to the grid, ii) One). Then, the evidence data collection unit 230 collects the amount of sales electricity (i) the amount of electric power to be transmitted to the electric power network, ii) the amount of load control included in the electric power transaction condition that is concluded, If the electric power amounts match, it can be judged that the electric power trading according to the electric power trading conditions is normally completed. Here, the micro grid that sells the power can supply power in the form of load control and / or transmission of the developed power to the power grid,

If it is determined that the power transaction is completed in the evidence data providing unit 250, the settlement unit 240 can settle the gain generated by the power purchase condition and the power sale condition. On the other hand, when a transaction is concluded, it is possible to settle the gain on the transaction.

The settlement unit 240 may set a predetermined portion of the revenues as an intermediary fee. On the other hand, commission fees can be a cost that is proportional to the amount of electricity sold regardless of the gain. Then, the predetermined portion of the revenues can be used as a power grid fee. On the other hand, commission fees can be a cost that is proportional to the amount of electricity purchased, regardless of the gain. And, regardless of the gain, the cost that is proportional to the amount of electricity purchased can be the electricity cost of the grid. The settlement unit 240 can perform settlement of the utility fee with the electric power company 400. The settlement unit 240 can perform settlement of the brokerage commission according to the set contract condition with at least one of the micro grid that sold the power and the micro grid that purchased the power.

The settlement unit 240 can settle the settlement with the power company directly or via the MG MI unit 300. [

The evidence data providing unit 250 can issue and manage the evidence of the corresponding power transaction based on the evidence collected by the evidence collection unit 230. Evidence can be used as a basis for estimating the electricity price of a power buyer. Accordingly, the settlement unit 240 may provide the management certificate to the electric power company 400 or the electric power market operator 500 directly or via the MG MI unit 300 in order to reflect the electric power transaction result when calculating the electric power charge can do. When the collection of the evidence data is completed, the MG agent apparatus 200 can judge that the transaction is completed.

Hereinafter, with reference to FIG. 13, a description will be given of a virtual power trading method between a direct transaction brokerage microgrid. Hereinafter, the description of the above-described items will be omitted or simplified. By the following description, the above-described configuration can be made more clear. Figure 13 is a flow chart of a direct-to-mediated microgrid-to-virtual power trading process.

First, the information collecting unit 210 may collect the power transaction information from the micro grid 100 to be managed (S131). The information collecting unit 210 may collect operating schedule information of each microgrid 100 as power transaction information. (T-DT), PL1 (T), and Pg1 (T + DT) , PL1 (T + DT), and time-based controllable load {Pl1 (T-DT), P1 (T), Pl1 (T + DT). Since the microgrid operation schedule may vary in real time, the information collection unit 210 may collect the microgrid operation schedule in real time.

The mediating unit 220 may reschedule each of the microgrid operating plans to optimize economical efficiency of the microgrid through power trading with a predetermined period (for example, every day, hour, etc.) (S132). The details of rescheduling can be as described above.

The mediating unit 220 can select the power trading target micro-grid through rescheduling (S133). Here, the power trading target microgrid may mean a combination in which the economic efficiency is optimized through power trading among the microgrid managed by the MG agent apparatus 200.

The mediating unit 220 may provide rescheduling information to the power grid target microgrid selected in S133 (S134). The mediator 220 may provide a rescheduling result to the power trading target microgrid at T-ΔT, where T is the starting point of the rescheduling target time zone in the microgrid operating schedule. At this time, the sales / purchase amount may be provided together.

The mediator 220 can determine that the power transaction is concluded (S135, S136) when the approval is received from T-2? T from all of the micro-grids forming the combination in which the economic efficiency becomes optimal.

The mediator 220 can determine that the power transaction is not concluded if the grant is not received within T-2? T from all of the micro-grids forming the combination with the best economical efficiency. At this time, (S137), and rescheduling information can be provided to the microgrid forming the combination (S134).

If the power trading condition is not satisfied in S135, S137, S134, and S135 may be repeated while sequentially selecting the subordinate.

If it is determined that the power trading is concluded, the mediating unit 220 can notify the power trading target microgrid of the power trading concluding result (S136). At this time, the power grid micro grid can operate the micro grid according to rescheduling information. Here, power generation control, load control, grid connection control, and the like can be performed.

The evidence data collection unit 230 may collect evidence from the microgrid to determine whether the power transaction has been normally performed between the microgrid in which the power transaction is concluded in accordance with the intermediary of the mediator 220, If it is determined that the power transaction has been completed in the evidence data providing unit 250, the amount of money generated by the power purchase condition and the power sale condition may be settled (S138). On the other hand, when a transaction is concluded, it is possible to settle the gain on the transaction.

The evidence data providing unit 250 can issue and manage the evidence of the corresponding power transaction based on the evidence collected by the evidence collection unit 230. Evidence can be used as a basis for estimating the electricity price of a power buyer. Accordingly, the settlement unit 240 may provide the management certificate to the electric power company 400 or the electric power market operator 500 directly or via the MG MI unit 300 in order to reflect the electric power transaction result when calculating the electric power charge (S139).

100: microgrid
200: MG agent device
300: MG MI device
400: Power company
500: Power Market Operator

Claims (12)

An information collecting unit for collecting scheduling information from a plurality of micro grids; And
And a mediating unit for rescheduling the collected scheduling information to select a microgrid to be a power trading target,
Wherein the scheduling information includes a power generation schedule by time slot, a load prediction value by time slot, and a controllable load by time slot,
Wherein the mediator determines at least two microgrid combinations whose economical efficiency is optimized through rescheduling of the scheduling information through power trading among microgrids to be managed,
Mediates power trading between at least two microgrid combinations for which the determined economics are optimized,
The intermediary provides the rescheduling result to the power grid microgrid,
It is determined that the power trading is concluded only when all the micro grids belonging to the power trading target micro grid are approved,
The mediating unit is configured to perform rescheduling on the entirety of the microgrid to be managed so as to optimize economical efficiency of each of the selected microgrid through i) selection of at least two microgrid and ii) generation control, Intermediate power trading between grid combinations,
Wherein the mediator is configured to calculate at least two micro grids when the gain is maximized by taking into consideration the total generation charge and the electric power charge of the selected at least two micro grids through the movement of the selected at least two micro grids, Of the total investment,
At least two micro-grids in which power transactions are concluded are operated according to rescheduling information,
The rewards generated due to the operation according to the rescheduling information are settled in at least two micro grids in which the power trading is concluded
Wherein the virtual power trading agent is a microgrid virtual power trading agent based on a direct transaction brokerage system. delete delete The method according to claim 1,
Wherein the power trading is performed through at least one of power generation amount control and load control. delete The method according to claim 1,
Wherein at least one of the brokerage fee and the network fee for the reimbursement generated in the power trading according to the rescheduling is settled in any one of a fixed system and a fixed rate system. . Collecting scheduling information from a plurality of micro-grids; And
And the mediating unit rescheduling the collected scheduling information to select the power trading target microgrid
Wherein the scheduling information includes a power generation schedule by time slot, a load prediction value by time slot, and a controllable load by time slot,
The step of the mediator selecting the microgrid for power trading
Determining at least two microgrid combinations whose economy is optimized through rescheduling of the scheduling information through a power transaction among the microgrid to be managed by the mediator,
Wherein the mediator mediates a power transaction between at least two microgrid combinations for which the determined economics are optimized,
The step of mediating a power transaction between at least two microgrid combinations in which the mediator is determined to be economically optimized
The intermediary providing the rescheduling result to the power grid microgrid,
When the brokerage unit approves all of the microgrid belonging to the power trading target microgrid, it is determined that the power trading is concluded
Lt; / RTI &gt;
The mediating unit is configured to perform rescheduling on the entirety of the microgrid to be managed so as to optimize economical efficiency of each of the selected microgrid through i) selection of at least two microgrid and ii) generation control, Intermediate power trading between grid combinations,
Wherein the mediator is configured to calculate at least two micro grids when the gain is maximized by taking into consideration the total generation charge and the electric power charge of the selected at least two micro grids through the movement of the selected at least two micro grids, Of the total investment,
At least two micro-grids in which power transactions are concluded are operated according to the rescheduling information,
And the reward generated due to the rescheduling information is settled to at least two micro grids in which the power trading is concluded
Wherein the microgrid virtual power trading method is based on a direct transaction brokerage method. delete delete 8. The method of claim 7,
Wherein the power trading is performed through at least one of power generation amount control and load control. delete 8. The method of claim 7,
Wherein the at least one of the brokerage fee and the network fee for the gain generated in the power trading according to the rescheduling is settled in any one of a fixed system and a fixed rate system. Virtual power trading method.

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