Energy trading system using micro grid distributed resources

Abstract

The present invention relates to an energy trading system using micro grid distributed resources. The energy trading system according to the present invention comprises: a data collection unit for collecting a predicted power generation amount expected at a future trading time point for a waste resource recycling energy power generation facility in a micro grid, and collecting purchase request amounts desired for a corresponding trading time point from a plurality of factories; a comparison unit for comparing the predicted power generation amount of the power generation facility with the total purchase request amount of all the factories; and a control unit which determines an energy supply amount according to a purchase request amount of each factory by accepting every request for each factory when the total purchase request amount is less than or equal to the predicted power generation amount, and which individually determines, on the basis of the purchase request amount of the factory and additional points of the factory, an energy supply amount distributed to each factory at the corresponding transaction time point, if the total purchase request amount is greater than the predicted power generation amount. According to the present invention, energy produced by a waste resource recycling energy power generation facility can be efficiently traded and supplied to each factory by utilizing distributed resources in a micro grid.

Description

Energy trading system using microgrid distributed resources

[0001] The present invention relates to an energy trading system using microgrid distributed resources, and more specifically, to an energy trading system using microgrid distributed resources that can efficiently trade and supply energy produced at a waste resource recycling energy generation facility based on distributed resources within a microgrid to the operating facilities of each factory within the microgrid.

[0002] Microgrids are similar to smart grids in that they integrate information technology into the power grid to control power generation and incorporate generation / consumption forecasting capabilities. However, their scale is smaller, primarily applied to industrial complexes and small villages. Furthermore, microgrids have the advantage of eliminating the need for large-scale transmission facilities because the distance between power sources and users is relatively short.

[0003] Distributed resources used to operate microgrids include waste-to-energy recycling power generation facilities, solar power, and energy storage systems (ESS). These distributed resources are connected to an energy network via microgrid operation platforms, enabling the exchange of power.

[0004] Each factory within the microgrid is equipped with distributed resources, such as solar power or an energy storage system (ESS). These distributed resources can be utilized by each factory to mitigate energy fluctuations. Solar power stores and generates electricity through solar panels during daylight hours. ESS can be charged using electricity generated by solar power or supplied from external sources.

[0005] ESS can be operated as an energy production method that utilizes the difference in electricity rates. As a simple example, it can have a structure in which electricity is charged during low-load hours when electricity rates are low, and the stored electric energy is discharged to demand sources to generate profits during high-load hours when electricity rates are high.

[0006] Waste resource recycling energy generation facilities can produce biogas using waste resources such as sewage, sewage wastewater, food waste, and dye residue, and use the produced biogas as an energy source to produce steam, gas, and electricity.

[0007] Steam, gas, and electricity produced at waste-to-energy power plants can be traded and supplied to various energy-demanding sources. These sources include not only grid power providers like KEPCO but also individual factories within microgrids.

[0008] Typically, each factory responds to the power supply required for facility operation by installing distributed power sources such as solar power and ESS as described above. However, a power energy efficiency strategy is needed to ensure a stable power supply for core facilities in operation (facilities that consume a lot of energy) and to operate the facilities economically.

[0009] In particular, a system is required that can efficiently supply and trade energy to each demander by considering the predicted production volume of renewable energy power generation facilities and the total amount of energy requested by each demander within the microgrid.

[0010] The technology underlying the present invention is disclosed in Korean Patent Publication No. 10-2023-0020206 (published on February 10, 2023).

[0011] The purpose of the present invention is to provide an energy trading system using distributed resources of a microgrid, which can efficiently trade and supply energy produced at a waste resource recycling energy generation facility based on distributed resources within a microgrid to the operating facilities of each factory within the microgrid.

[0012] The present invention relates to an energy trading system using distributed resources of a microgrid, comprising: a data collection unit that collects a predicted power generation amount expected at a future transaction time for a waste resource recycling energy generation facility within the microgrid, and collects a desired purchase request amount at the corresponding transaction time from a plurality of factories within the microgrid; a comparison unit that compares the predicted power generation amount of the power generation facility with a total purchase request amount, which is the sum of the purchase request amounts of all factories; and a control unit that, if the total purchase request amount of all factories is less than the predicted power generation amount, accepts all requests from each factory and determines an energy supply amount according to the purchase request amount of each factory, and if the total purchase request amount is greater than the predicted power generation amount, individually determines an energy supply amount to be distributed to each factory at the corresponding transaction time based on the purchase request amount of the factory and a bonus point previously assigned to the factory.

[0013] In addition, the energy trading system using the microgrid distributed resources further includes a setting unit that initially sets a reference value for the maximum purchase request amount that can be traded for each factory, and in the case of a factory to which the above-mentioned bonus points are granted, resets the maximum purchase request amount by increasing it from the reference value by an amount proportional to the above-mentioned bonus points, but limits the amount to within a preset upper limit, and the reference value for the maximum purchase request amount may correspond to a value obtained by dividing the predicted power generation amount by the number of the above-mentioned factories.

[0014] In addition, the energy trading system using the microgrid distributed resources may further include a communication unit that is connected to the power generation facility and the plurality of factories through a network and communicates with them, and transmits a preset minimum purchase amount and the maximum purchase request amount matched to the corresponding factory to a management terminal on the side of each factory.

[0015] In addition, the management terminal on the factory side may be able to select the purchase request amount within the range of the preset minimum purchase amount or the maximum purchase request amount matched to the factory.

[0016] In addition, the energy trading system using the above microgrid distributed resources may further include a bonus point management unit that differentially grants bonus points to each factory in conjunction with the energy efficiency activity performance of the factory, and manages and updates the bonus points for each factory.

[0017] In addition, the energy efficiency activity performance of the above-mentioned factory may include at least one of participation in a demand response (DR) project conducted by the government, operation of a smart power meter (Advanced Metering Infrastructure, AMI) for major energy facilities within the factory, operation of distributed resources including solar power and energy storage devices, and operation of an energy management system (EMS) for energy management.

[0018] In addition, if the total purchase request amount of the entire factory is greater than the predicted power generation amount of the power generation facility, and thus the energy that can be supplied by the power generation facility is limited, the control unit can determine the priority based on at least one of the presence or size of the bonus point so that the energy is distributed in order of the factories with the highest priority so that the energy is distributed in order of the factories with the highest priority so that the factories with the bonus point or the high bonus point are given priority.

[0019] In addition, the control unit, when the energy that can be supplied by the power generation facility is limited, gives priority to a factory that has the above-mentioned bonus point, but in the case of a factory that has the above-mentioned bonus point and has a desired purchase request amount that is lower than a preset reference value, accepts the desired purchase request amount as is and determines the energy supply amount, and the reference value may be a value obtained by dividing the predicted power generation amount by the number of the factories.

[0020] In addition, the control unit may, in the case of a factory that has the above-mentioned bonus points and whose desired purchase request quantity exceeds the above-mentioned reference value, give priority in the order of the higher bonus points, but if there are multiple factories with the same bonus points, give a higher priority to a factory with a higher energy transaction participation record.

[0021] In addition, when the supplyable energy of the power generation facility is limited, the control unit can determine the energy supply amount for each factory by multiplying the purchase request amount desired by each factory by a set ratio and adjusting the value downward, and then distribute the energy in order of the factories with the highest priority.

[0022] Additionally, the ratio may be a value obtained by dividing the predicted power generation amount by the total purchase request amount.

[0023] In addition, the control unit can transmit the determined energy supply amount to each factory and determine energy supply and demand upon receiving a transaction confirmation signal from each factory.

[0024] According to the present invention, an energy trading platform is provided that can efficiently trade and supply energy produced by a waste resource recycling energy generation facility utilizing distributed resources within a microgrid to the operating facilities of each factory within the microgrid, thereby enabling low-cost and reasonable transactions between distributed resources.

[0025] In addition, according to the present invention, energy produced from a recycling energy power generation facility can be supplied to each factory requiring energy within a microgrid at a lower price than the market price, thereby increasing the recycling rate of waste resources and promoting the circular use of waste resources with high utility value.

[0026] In addition, the present invention can improve energy efficiency activities and recycling energy transactions of factories by preferentially distributing energy to factories with high bonus points or high transaction frequency based on bonus points awarded according to performance in energy efficiency activities when the predicted power generation amount of power generation facilities is less than the total requested energy amount of the entire factory and energy is limited.

[0027] FIG. 1 is a diagram exemplarily showing a microgrid distributed resource for an embodiment of the present invention.

[0028] FIG. 2 is a drawing illustrating an energy trading system using microgrid distributed resources according to an embodiment of the present invention.

[0029] Figure 3 is a drawing showing in detail the configuration of the energy trading system of Figure 2.

[0030] Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings so that those skilled in the art can easily practice the present invention. However, the present invention may be implemented in various different forms and is not limited to the embodiments described herein. In addition, in the drawings, parts irrelevant to the description have been omitted to clearly explain the present invention, and similar parts have been designated with similar reference numerals throughout the specification.

[0031] Throughout the specification, when a part is said to be "connected" to another part, this includes not only the cases where the parts are "directly connected" but also the cases where the parts are "electrically connected" with other elements intervening. Furthermore, when a part is said to "include" a component, this does not exclude other components, but rather includes other components, unless otherwise stated.

[0032] The present invention relates to an energy trading system utilizing microgrid distributed resources, and proposes a system capable of efficiently trading waste resource recycling energy utilizing distributed resources within a microgrid.

[0033] The present invention provides an energy trading platform that can efficiently trade and supply energy resources produced from waste resource recycling energy generation facilities by utilizing distributed resources within a microgrid to the operating facilities of each factory within the microgrid.

[0034] FIG. 1 is a diagram exemplarily showing a microgrid distributed resource for an embodiment of the present invention.

[0035] As illustrated in Figure 1, various distributed resources exist within the microgrid (1), such as a waste resource recycling energy generation facility (10), solar power, and an energy storage system (ESS). These distributed resources can be connected to an energy network through the proposed microgrid energy trading platform (100) and exchange power with each other.

[0036] In Fig. 1, the waste resource recycling energy generation facility (10) can produce recycled energy such as electricity, gas, and steam by using waste resources (e.g., livestock manure, food waste, dye sludge, by-products, etc.).

[0037] At this time, waste resources may include waste such as by-products, residues, waste, and food waste discharged from each factory (20) existing within the microgrid, as well as waste such as manure and various sludge discharged from external facilities (e.g., livestock facilities, waste treatment plants, etc.).

[0038] A waste resource recycling energy generation facility (10) can produce biogas by utilizing such waste resources, and can produce energy such as steam, gas, and electricity using the produced biogas as an energy source.

[0039] The waste resource recycling energy generation facility (10) has the advantage of being able to reduce energy resource costs by not directly inputting natural resources such as coal, thereby lowering the energy supply unit price and supplying energy to the user (factory) at a cheaper price.

[0040] These waste resource recycling energy generation facilities (10) can trade and supply the produced energy to multiple factories (20) that require energy within the microgrid through a microgrid energy trading platform, i.e., the proposed energy trading system (100).

[0041] Here, each factory (20) can operate various facilities by utilizing energy provided from external combined heat and power plants (CHP) (2) as well as self-produced distributed resources such as ESS and solar power, and can purchase energy produced by waste resource recycling energy generation facilities (10) traded through an energy trading system (100) at a lower unit price than CHP energy and use it for facility operation.

[0042] Such distributed resources (waste resource recycling energy generation facilities, solar power, energy storage devices) can be structured to use the energy within a specific range (industrial complex, specific small complex) where a microgrid (1) is built, but consumers within the range where the microgrid (1) is built can also receive external energy support.

[0043] In addition, in the case of waste resource recycling energy generation facilities (10) among distributed resources, the energy sales standard unit price is determined by considering the supply and demand status of waste resources, the cost of chemicals for producing biogas, and the general unit price of the type of energy being generated, but may be set lower than the general unit price of the type of energy in question.

[0044] Here, when determining the unit price of sale, the unit price during peak load hours can be set lower than the unit price during off-peak load hours, thereby structurally supporting the reduction of energy costs incurred during peak load hours when purchasing energy through the power generation facility.

[0045] In addition, among distributed resources, for solar power and ESS, the standard unit price is set based on the transaction cost of new and renewable energy between Korea Electric Power Corporation (KEPCO) and the Korea Power Exchange (KPX), but is set higher than the cost of electricity according to the load time zone and lower than the transaction cost of KEPCO, so that the factory or management entity that owns the distributed resource can make a profit when selling the distributed resource.

[0046] An energy trading system (100) according to an embodiment of the present invention is network-connected to each component within a microgrid, capable of collecting, monitoring, and analyzing information, and managing and controlling energy supply and demand. The energy trading system (100) may be located within or outside the microgrid, and may be network-connected to management terminals, etc., belonging to each power generation facility (10) and factory (20), thereby exchanging various types of information.

[0047] Figure 2 is a diagram illustrating an energy trading system utilizing microgrid distributed resources according to an embodiment of the present invention. As shown in Figure 2, the energy trading system (100) can be network-connected to a first management terminal (200) on the power generation facility (10) side and a second management terminal (300) on the factory side, respectively.

[0048] In an embodiment of the present invention, the microgrid energy trading system (100) can receive a predicted power generation amount expected for a future trading time (e.g., the next day, week, month) from a waste resource recycling energy generation facility (10) and can receive a purchase request amount desired to be purchased at the corresponding trading time from each factory (20).

[0049] In addition, the microgrid energy trading system (100) can plan energy distribution to each factory (20) based on information collected from the power generation facility (10) and multiple factories (20).

[0050] To this end, the microgrid energy transaction system (100) can collect related data by communicating with a first management terminal (200) on the power generation facility (10) side and a plurality of second management terminals (300) on the plant (20) side, and can transmit, receive, and exchange various types of information with them.

[0051] The microgrid energy trading system (100) can collect the predicted power generation amount for the next day, week, and month from the power generation facility (10) through a network-connected first management terminal (200) and provide it to multiple second management terminals (300) on each network-connected factory side.

[0052] To this end, the microgrid energy trading system (100) can provide an energy trading service platform accessible and usable by the first management terminal (200) and the second management terminal (300). This platform can be provided based on a web or app environment. Here, the network can include a wired, wireless, or a hybrid wired / wireless network.

[0053] The microgrid energy trading system (100) can establish an energy distribution plan for each factory (20) by comparing the predicted power generation amount of the power generation facility (10) with the total purchase request amount that is the sum of the purchase request amounts of all factories (20).

[0054] If the total purchase request amount requested by multiple factories (20) is less than the predicted generation amount of the power generation facility (10), the microgrid energy trading system (100) accepts all transaction requests received from each factory (20). In addition, if the total purchase request amount of each factory is less than the predicted generation amount, the predicted generation amount remaining after the transaction can be converted into electricity and stored in an energy storage device for later use, or can be sold to a power generation business operator such as KEPCO for reverse transmission, or can be sold to a carbon emission trading business operator. Accordingly, the predicted energy generation amount is not discarded by the power generation energy sales business operator.

[0055] In contrast, if the total purchase request amount requested by multiple factories (20) is greater than the predicted power generation amount of the power generation facility (10), it is difficult to accommodate all transaction requests received from multiple factories (20). In this case, all energy produced by the power generation facility (10) can be controlled to be sold and input to multiple factories (20). Here, considering the ratio of the transaction request amount and the total purchase request amount, an amount less than the transaction request amount actually requested by each factory (20) can be distributed, and energy can be distributed in order of priority. In some factories, energy may not be distributed from the power generation facility (10) due to being pushed down in priority. Here, the priority can be determined based on the bonus points awarded according to the factory's performance in participating in environmentally friendly activities, and energy transaction performance may be given further consideration.

[0056] Below, the configuration of an energy trading system using microgrid distributed resources according to an embodiment of the present invention is described in more detail.

[0057] FIG. 3 is a detailed diagram illustrating the configuration of the energy trading system of FIG. 2. As illustrated in FIG. 3, the energy trading system (100) according to an embodiment of the present invention may include a data collection unit (110), a comparison unit (120), a control unit (130), and may further include a setting unit (140), a communication unit (150), and a bonus point management unit (160). Here, the operation of each unit (110, 120, 140, 150, 160) and the data flow between each unit may be controlled by the control unit (130).

[0058] The data collection unit (110) collects the predicted power generation amount expected at a future transaction time (e.g., the next day, Sunday, or month) for the waste resource recycling energy generation facility (10) (hereinafter, power generation facility) within the microgrid, and collects the desired purchase request amount at the corresponding transaction time from each of the multiple factories (20) within the microgrid.

[0059] Here, the data collection unit (110) can collect the corresponding information by communicating with the first management terminal (200) on the power generation facility side and the second management terminal (300) on each factory side using the communication unit (150), and can transmit the collected information to the comparison unit (120). Of course, for this purpose, the communication unit (150) can be connected to the power generation facility (10) and multiple factories (20) through a network and communicate with them.

[0060] The comparison unit (120) compares the predicted power generation of the power generation facility (10) with the total purchase request amount, which is the sum of the purchase request amounts of the entire plant. Then, the comparison result can be transmitted to the control unit (130).

[0061] The control unit (130) can receive the comparison result from the comparison unit (120) and control the amount of energy supplied to each plant based on the comparison result.

[0062] Specifically, if the total purchase request amount of all factories is less than the predicted power generation amount, the control unit (130) can accept all requests from each factory and determine the energy supply amount according to the purchase request amount of each factory. In addition, if the total purchase request amount is greater than the predicted power generation amount, the control unit (130) can individually determine the energy supply amount to be distributed to each factory at the corresponding transaction time based on the purchase request amount of each factory and the bonus points already assigned to each factory.

[0063] In addition, the control unit (130) can transmit the determined energy supply amount to each factory and determine the energy supply and demand when receiving a transaction confirmation signal from each factory.

[0064] In embodiments of the present invention, the purchaser's purchase request capacity can be limited to a set size. If the purchaser's purchase request capacity is set to unlimited for transactions, all purchasers will demand the full capacity of the low-cost power generation facility (10), making energy distribution to all users within the microgrid impossible.

[0065] Accordingly, in the embodiment of the present invention, the purchase request capacity of a buyer can be limited when the total purchase request amount of the entire factory (20) is greater than the predicted power generation amount or when the purchase request amount of one buyer is greater than the predicted power generation amount.

[0066] In order to limit the purchase request capacity, when the seller announces the predicted power generation amount to the transaction through the platform, the buyer must also apply for purchase in advance. If the buyer does not apply in advance, participation in the purchase for that round will be impossible.

[0067] Additionally, there is no minimum purchase amount for eligible buyers. However, since you have applied to participate in the purchase, you must make the minimum purchase. Accordingly, the purchase request amount must be a natural number greater than 0 (C>0). This minimum purchase amount (C) can be preset to any value greater than 0.

[0068] In an embodiment of the present invention, the setting unit (140) may initially set a reference value (F) for the maximum purchase request amount that can be traded per factory. Specifically, the setting unit (140) may divide the predicted power generation amount (E) of the power generation facility (10) by the number (N) of factories participating in the purchase, set a reference value (F=E / N) for equal distribution, and calculate the maximum purchase request amount based on this.

[0069] Here, in the embodiment of the present invention, for a factory without a bonus point (bonus point = 0), the maximum purchase request amount is equal to the predicted power generation divided by the number of factories (E / N), i.e., the reference value. However, for a factory with a bonus point (bonus point > 0), the maximum purchase request amount can be higher than the reference value, and can be increased up to a limited upper limit (e.g., 150% of the reference value).

[0070] If the predicted power generation is 800 and the number of factories is 10, the reference value of the maximum purchase request (F) is 80. For factories without bonus points, F=80, and for factories with bonus points, F is determined to be a value greater than the reference value 80 and can be up to 120 (150% of the reference value).

[0071] In this way, the setting unit (140) can adjust the maximum purchase request amount for each factory by considering the bonus points assigned to each factory. That is, for factories assigned bonus points, the setting unit (140) resets the maximum purchase request amount by increasing it from the reference value by an amount proportional to the bonus points. However, during the reset process, the size of the maximum purchase request amount may be limited to a preset upper limit (e.g., 150% of the reference value).

[0072] In this embodiment of the present invention, the communication unit (150) can transmit a preset minimum purchase amount and a maximum purchase request amount (F) matched to the corresponding factory to the second management terminal (300) on the factory side. Accordingly, the second management terminal (300) on the factory side can select a purchase request amount within the range of the preset minimum purchase amount and the maximum purchase request amount matched to the corresponding factory.

[0073] Assuming that the minimum purchase quantity is preset to 10, if the maximum purchase request quantity of factory 1 is 100, the purchase request quantity can be entered within the range of 10 to 100 through the terminal of factory 1, and if the maximum purchase request quantity of factory 2 is 80, the purchase request quantity can be entered within the range of 10 to 80 through the terminal of factory 2.

[0074] In this way, the energy trading platform according to the embodiment of the present invention can set the range of energy capacity that can actually be purchased for each factory by considering the predicted power generation amount of the power generation facility (10) and the bonus points granted to each factory, and guide the range to the second management terminal (300) of each factory.

[0075] In an embodiment of the present invention, bonus points may be awarded based on the factory's performance in energy efficiency activities. To this end, the bonus points management unit (160) may differentially award bonus points to each factory based on its energy efficiency performance, and may manage and update bonus points for each factory.

[0076] Here, energy efficiency activities may include at least one of the following: participation in a national demand response (DR) project, operation of smart electricity meters (Advanced Metering Infrastructure, AMI) for major energy facilities within the factory, operation of distributed resources including solar power and energy storage, and operation of an Energy Management System (EMS) for energy management. These activities relate to energy efficiency and energy conservation, and a wider range of other energy efficiency activities may be applied.

[0077] At this time, a set score can be assigned for each energy efficiency activity performed at the factory, and a bonus point can be calculated by adding up the scores for each activity. The scores for each activity type can be set equally or differentiated based on importance.

[0078] The energy trading system (100) according to this embodiment of the present invention manages each factory's bonus points based on its energy efficiency performance. Prior to the actual start of a transaction, the system can verify each factory's bonus points and then perform relevant transaction procedures. Furthermore, prior to the start of a transaction, it can check for any changes to bonus points, reset each factory's maximum purchase request, and immediately reflect the changes on the platform.

[0079] As described above, in the embodiment of the present invention, if the total purchase request amount of the entire factory is less than or equal to the predicted power generation amount, the control unit (130) accepts all requests for each factory, but if the total purchase request amount is greater than the predicted power generation amount, the control unit (130) individually determines the amount of energy supplied to be distributed to each factory at the time of the transaction based on the purchase request amount of the factory and the bonus points already assigned to the factory.

[0080] At this time, the factory's purchase request quantity and bonus points are used to calculate the maximum purchase request quantity of the factory as explained above, and the bonus points can be additionally used to determine the factory's energy distribution priority.

[0081] In an embodiment of the present invention, if the total purchase request amount of the entire factory is greater than the predicted power generation amount of the power generation facility, and thus the energy that can be supplied by the power generation facility is limited, the control unit (130) can determine the priority based on at least one of the presence or size of a bonus point so that the energy is distributed in order of the factories with the highest priority ...

[0082] Specifically, in the case where the energy that can be supplied by the power generation facility is limited as described above, the control unit (130) gives priority to allocating to a factory with a bonus point (bonus point > 0) over a factory without a bonus point (bonus point = 0). However, in the case of a factory with a bonus point and a desired purchase request amount that is lower than the reference value (F = E / N), the control unit can determine the energy supply amount by accepting the desired purchase request amount as is. Here, the reference value corresponds to the value obtained by dividing the predicted power generation amount (E) by the total number of factories (N) as explained above.

[0083] That is, in the embodiment of the present invention, the control unit (130) distributes energy based on the bonus points, giving priority to factories with bonus points. However, if the factory has bonus points and the purchase request amount is equal to or less than the reference value for equal distribution, the purchase request amount is accepted as is to determine the energy supply amount. However, even if there are bonus points, for factories with a purchase request amount greater than the reference value, a value adjusted downward by multiplying the purchase request amount by a set ratio can be applied as the energy supply amount. In this case, the set ratio can correspond to a value calculated by dividing the predicted power generation amount by the total purchase request amount.

[0084] Next, the control unit (130) may, in the case of a factory that has a bonus point as described above and whose desired purchase request quantity exceeds a reference value, give priority in the order of the highest bonus point. However, if there are multiple factories with the same bonus point, a higher priority may be given to a factory with a higher energy transaction participation record.

[0085] That is, in the case of factories requesting capacity exceeding the standard value, priority is given in order of higher bonus points, but if there are factories with the same bonus points, priority is given to factories with higher performance in energy transactions through the platform of the present invention.

[0086] In addition, as above, in the case where the total purchase request amount is greater than the predicted power generation amount and the energy that can be supplied is limited, the control unit (130) can determine the energy supply amount for each factory by multiplying the purchase request amount desired by each factory by a set ratio and adjusting it downward so that the limited energy is distributed as evenly as possible to each factory, and can distribute the energy in order of priority to the factories.

[0087] The set ratio here is specifically the ratio of the predicted power generation to the total purchase request, and thus can take on a positive value between 0 and 1. Thus, each plant's purchase request is multiplied by a ratio between 0 and 1, resulting in a downward adjustment of the requested amount. This ensures that energy is distributed to all possible plants, but some plants may be pushed down the priority list, preventing transactions and ultimately not receiving energy at all. These lower-priority plants are likely to have a poor history of energy efficiency initiatives and low energy transaction performance through the proposal platform.

[0088] In this way, according to the present invention, energy is preferentially distributed in the order of factories with high bonus points, or, if bonus points are the same, energy is distributed in the order of factories with excellent transaction participation performance, thereby inducing active energy efficiency activities and increasing transaction participation.

[0089] The control unit (130) transmits the energy amount confirmed through the platform to the management terminal (300) of each factory, thereby enabling each factory manager to check the confirmed energy amount and determine the energy supply and demand through confirmation of the transaction of the energy.

[0090] In addition, the power generation facility (10) can supply energy according to the contracted schedule and measure the amount of energy consumed through a meter between the supplier and the recipient, and the measured meter can be used for payment for the transaction. In addition, the measured meter value can be used to predict the amount of energy consumed for the next transaction. For example, the energy loss rate that occurs during energy transmission can be calculated by comparing the meter values ​​between the supplier and the recipient, and the result can be used as data on energy efficiency, production, supply, and demand.

[0091] According to the present invention as described above, an energy trading platform is provided that can efficiently trade and supply energy produced by a waste resource recycling energy generation facility utilizing distributed resources within a microgrid to the operating facilities of each factory within the microgrid, thereby enabling low-cost and reasonable transactions between distributed resources.

[0092] In addition, according to the present invention, energy produced from a recycling energy power generation facility can be supplied to each factory requiring energy within a microgrid at a lower price than the market price, thereby increasing the recycling rate of waste resources and promoting the circular use of waste resources with high utility value.

[0093] In particular, according to the present invention, energy produced from a recycled energy power generation facility can be traded and supplied at a lower price than the market price to each factory requiring energy within a microgrid as well as to the grid power.

[0094] In addition, the present invention can improve energy efficiency activities and recycling energy transactions of factories by preferentially distributing energy to factories with high bonus points or high transaction frequency based on bonus points awarded according to performance in energy efficiency activities when the predicted power generation amount of power generation facilities is less than the total requested energy amount of the entire factory and energy is limited.

[0095] While the present invention has been described with reference to the embodiments illustrated in the drawings, these are merely exemplary, and those skilled in the art will understand that various modifications and equivalent alternative embodiments are possible. Therefore, the true scope of technical protection of the present invention should be determined by the technical spirit of the appended claims.

Claims

1. In an energy trading system using microgrid distributed resources, A data collection unit that collects the expected power generation amount at a future transaction time for a waste resource recycling energy generation facility within a microgrid and collects the desired purchase request amount at the transaction time from each of a plurality of factories within the microgrid; A comparison unit that compares the predicted power generation of the above power generation facility with the total purchase request amount, which is the sum of the purchase request amount of the entire plant; and An energy transaction system including a control unit that determines the energy supply amount according to the purchase request amount of each factory by accepting all requests from each factory if the total purchase request amount of all factories is less than the predicted power generation amount, and individually determines the energy supply amount to be distributed to each factory at the corresponding transaction time based on the purchase request amount of the factory and the bonus points already assigned to the factory if the total purchase request amount of the entire factory is greater than the predicted power generation amount.

2. In claim 1, The above-mentioned factory-specific maximum purchase request amount is initially set as a reference value, and in the case of a factory to which the above-mentioned bonus points are granted, the maximum purchase request amount is reset by increasing it from the above-mentioned reference value by a size proportional to the above-mentioned bonus points, but further includes a setting section that limits the size to within a preset upper limit. An energy trading system in which the reference value for the above maximum purchase request amount is the value obtained by dividing the above predicted power generation amount by the number of plants.

3. In claim 3, An energy trading system further comprising a communication unit that is connected to the above power generation facility and the above multiple factories through a network and communicates, and transmits a preset minimum purchase amount and the maximum purchase request amount matched to the corresponding factory to a management terminal on the side of each factory.

4. In claim 3, The management terminal on the factory side above is, An energy trading system that allows selection of the purchase request amount within the range of the minimum purchase amount set above and the maximum purchase request amount matched to the relevant factory.

5. In claim 1, An energy trading system that further includes a bonus point management department that differentially grants bonus points to each factory based on the performance of energy efficiency activities of the factory, and manages and updates the bonus points for each factory.

6. In claim 5, The energy efficiency activities of the above factory are as follows: An energy trading system that includes at least one of the following: participation in a demand response (DR) project conducted by the government, operation of smart power meters (Advanced Metering Infrastructure, AMI) for major energy facilities within a factory, operation of distributed resources including solar power and energy storage devices, and operation of an Energy Management System (EMS) for energy management.

7. In claim 1, The above control unit, An energy trading system that determines priorities based on at least one of the presence or size of a bonus point so that, when the total purchase request amount of the entire factory is greater than the predicted power generation amount of the power generation facility and the energy that can be supplied by the power generation facility is limited, energy is distributed in order of priority to factories with high priorities so that the factories with the bonus point or high bonus point are given priority for distribution.

8. In claim 7, The above control unit, In case the energy supply capacity of the above power generation facility is limited, priority is given to the factories with the above-mentioned bonus points, but in case of factories with the above-mentioned bonus points and the desired purchase request amount is below the preset standard value, the desired purchase request amount is accepted as is to determine the energy supply amount. The above reference value is an energy trading system in which the above predicted power generation amount is divided by the number of factories.

9. In claim 8, The above control unit, An energy trading system in which, in the case of factories with the above-mentioned bonus points and whose desired purchase request quantity exceeds the above-mentioned standard, priority is given in order of the highest bonus points, but if there are multiple factories with the same bonus points, a higher priority is given to a factory with a higher energy trading participation record.

10. In claim 7, The above control unit, An energy trading system that determines the energy supply amount for each factory by multiplying the purchase request amount desired by each factory by a set ratio and adjusting the value downward when the energy supply capacity of the above power generation facility is limited, and then distributes energy in order of priority to the factories.

11. In claim 10, The above ratio is an energy trading system in which the above predicted power generation amount is divided by the above total purchase request amount.

12. In claim 1, The above control unit, An energy trading system that transmits the determined energy supply amount to each factory and determines energy supply and demand upon receiving a transaction confirmation signal from each factory.

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