KR20210015100A - A Method for Intermediary Transaction of Power Resource - Google Patents

Abstract

The present invention relates to a method for intermediary transaction of small-scale power resources. The present invention relates to an intermediary transaction method for power produced from respective small-scale power resource units or a set power resource unit comprising a set of the small-scale power resource units. According to a result of comparing a planned saleable capacity and an actual output amount of each of the small-scale power resource units or the set power resource unit with a predicted output amount of each of the small-scale power resource units through a device for intermediary transaction of power, the reliability of the small-scale power resource unit is different. According to the reliability, a settlement capacity, which is a profit portion of a small-scale power resource provider, and a settlement capacity, which is a profit portion of an intermediary transaction provider operating the device for intermediary management of power, are determined.

Description

{A Method for Intermediary Transaction of Power Resource}

The present invention relates to a small-scale power resource brokerage transaction method.

The current small-scale power brokerage market needs to collect small-scale power resources that cannot participate in the power wholesale market so that they can be traded in the power market.

However, it is currently difficult for a business operator owning a small-scale electric power resource to respond effectively to such electric power transactions.

The present invention minimizes the error between the predicted output amount and the actual output amount between a power brokerage business operator and a small power resource operator by applying the reliability of each generation resource, thereby increasing the stability of the power transaction of small-scale power resource generation amount, which is a new renewable energy with high generation prediction volatility. It is to provide a method of intermediary trading of power resources.

The solution means of the present invention is an intermediary transaction method of power produced from the collective power resource unit consisting of each small power resource unit or a set of small power resource units,

The reliability of the small-scale power resource unit is changed according to the comparison of the planned sales available capacity and actual output amount of each small-scale power resource unit or the collective power resource unit and the predicted output amount of each small-scale power resource unit through a power brokerage management device,

According to the reliability, a power resource brokerage transaction method may be provided in which a settlement capacity, which is a profit of the small-scale power resource provider, and a settlement capacity, which is a profit of an intermediary transaction business operator operating the power brokerage management device, depend.

Since power supply must be made stably, reliability may be deteriorated if the brokerage business operator fails to achieve the power sales capacity that is supposed to be sold to the market.

According to the present invention, the stability of power transaction can be achieved by minimizing the error rate between the predicted output amount and the actual output amount by reflecting the reliability of each generation resource.

A small power resource business operator contracted with an intermediary business operator sells power resources through an intermediary business operator, measures the actual output amount of power to be intermediated, and compares the actual output amount with the predicted output amount calculated through the power intermediary management device. After calculating the reliability for each resource, it is possible to maintain the reliability of the small-scale power resource unit or the collective power resource unit by calculating it in consideration of the planned sales available capacity and reliability.

If the small power resource business operator does not meet the planned sales capacity, the total power transaction revenue, the profit distributed to the intermediary business operator, increases. Conversely, if the actual output amount is higher than the predicted output amount of the intermediary business operator, the intermediary business operator's The forecast may be regarded as a failure, and the revenue distributed to the power resource provider of the total power transaction revenue may increase.

If the predicted output amount is less than the actual output amount, the brokerage business operator's prediction may fail, the small power resource service provider's profits increase, and the brokerage trader's profit may decrease.

When the predicted output amount is greater than the actual output amount and the actual output amount is larger than the planned sales capacity, the distribution of profits between the small power resource provider and the brokerage business operator may be most desirable.

In addition, if the predicted output amount is greater than the actual output amount and the actual output amount is less than the planned sales capacity, the failure of the output performance of the small power resource business operator and the prediction failure of the intermediary business operator will result in the intermediary trading business's profit compared to the profit of the small power resource business operator. Revenue can be reduced.

The present invention can actively induce small-scale power resources, such as solar energy, wind energy, and wave energy, to participate in the power market as predictable power generation resources.

In addition, small-scale power resource providers can participate in large-scale power generation projects through the power intermediary device according to the present invention to secure profits (generation capacity fees, auxiliary service fees, etc.) in the power market.

1 is a schematic configuration diagram of an intermediary device for implementing an intermediary transaction method of the present invention.
2 is a block diagram of a power brokerage management apparatus for implementing the brokerage transaction method of the present invention.
3 to 5 are graphs comparing the planned sales available capacity, the maximum planned sales available capacity and the actual output amount of the small power resource unit according to the brokerage transaction method of the present invention, and the predicted output amount by the power brokerage management device.

Hereinafter, specific details for carrying out the present invention will be described in detail based on the accompanying exemplary drawings.

First, terms for describing the method of intermediating small-scale power resources of the present invention are defined as follows.

[Term Definition]

Small-scale electricity brokerage business refers to a business whose main purpose is to collect electricity produced or stored from small-scale electricity resources and trade them through the electricity market.

The Small Power Ministry refers to new energy and renewable energy facilities, electrical storage devices, and electric vehicles.

A brokerage business operator means a person whose main purpose is to recruit and manage small-scale electric power resources and trade electric power produced or stored therefrom.

The brokerage market refers to a small power brokerage market opened by a power exchange so that brokerage traders can recruit and manage small power resources.

A power resource provider is a person who owns or intends to possess small-scale power resources, and provides a certificate of supply of power or stored power and renewable energy produced from small-scale power resources that the person possesses or intends to possess to a brokerage business operator through an intermediary market. It refers to a person who intends to entrust the transaction authority delegation of "certificate") and management of small power resources.

The brokerage contract refers to a contract concluded by a power resource provider with a brokerage business operator to entrust the power and supply certificate transaction authority and small power resource management.

The collective power resource unit refers to a virtual electric facility for trading in the power market by integrating power produced from small-scale power resources recruited by a brokerage business operator through an brokerage contract.

The amount of power generated refers to the amount of power generated by the small-scale power resource unit, and the amount of output refers to the amount of power generated by subtracting the amount of consumption within the facility or the internal load from the amount of power generated by the corresponding power resource unit.

Therefore, it can be expressed as'output amount = power generation-demand amount'.

[Summary of small-scale power resource brokerage transaction technology]

In the power transaction, an intermediary trading company may collect small-scale power resource providers to form a collective power resource for trading.

Therefore, when a small power resource business operator enters into an intermediary contract with an intermediary business operator and delegates transaction rights such as power and supply certificates to the intermediary business, the intermediary business operator is a collective power resource unit consisting of the power delegated to the transaction from the power resource business. It can act as an agent for electricity and supply certificate transactions.

The collective power resource unit should consist of at least 1MW, and the facility capacity of the collective power resource is equal to the sum of the installed capacity of the configured small power resource unit.

One small-scale power resource unit cannot be registered in duplicate or more than two aggregate power resource units.

The intermediary trading operator may have the predicted output amount of such aggregated power resource unit submitted to the power exchange by 10 am the day before the power market trading day.

If there is a need to change the forecast output even after the deadline has passed, the changed forecast output can be submitted to the power exchange up to one hour before the corresponding transaction time.

In addition, the brokerage business operator can sell the entrusted supply certificate, and manage the measurement data of the small power resource unit constituting the collective power resource unit to be transmitted to the power exchange without error.

The amount of electricity measured by the collective power resource unit by time is calculated by summing the amount of electricity measured by the time period of the small power resource unit constituting the collective power resource. Can be paid with.

A brokerage business operator can separately charge a settlement fee (a brokerage fee, etc.) to a small power resource business.

The roles of brokerage business operators are as follows.

1) Facility management of small power resource providers.

2) Power transaction and supply certificate transaction agency for small power resource providers.

3) Submission of predicted output for each small power resource unit or collective power resource unit.

[Example]

The present invention relates to an intermediary transaction method capable of securing the stability of power transaction by reducing an error between an actual output amount and a predicted output amount between a power brokerage transaction operator and a small power resource operator, and a specific embodiment will be described next.

1 is a schematic configuration diagram of an intermediary device for implementing an intermediary transaction method of the present invention. As shown in Figure 1, the present invention is a plurality of small-scale power resource unit 100, a power brokerage management device 200 for mediating and managing the transaction of power produced from the small-scale power resource unit 100, the power brokerage management device ( It may include a power trading device 300 for bidding the power capacity of the small-scale power resource unit 100 from 200).

The small-scale power resource unit 100, for example, as a renewable energy source, is a power generation device that converts at least one of solar energy, wind energy, intellectual energy, wave energy and bio energy into electric energy, and additionally , At least one of an energy storage system (ESS), a steam turbine generator, a combined heat and power generator (CHP), or a fuel cell may be further included.

The small-scale power resource unit 100 operator (small-scale power resource operator) goes through a registration procedure in advance through an authentication process (for example, a renewable energy supply certificate (REC) account) to the power brokerage management device 200 according to the present invention. I can. In addition, a small power resource provider may enter business information, payment account information, power generation facility conditions, etc. upon registration.

The small-scale power resource unit 100 manages information on the amount of power produced by the management server 120, and may be separately managed for each small-scale power resource unit 100.

The management server 120 may be connected to the power brokerage management device 200 through a communication network.

The power brokerage management device 200 and the power transaction device 300 may each be a server and may be connected through a communication network.

The power brokerage management apparatus 200 may include a generation amount prediction unit 210, a monitoring unit 220, a calculation unit 230, and a control unit 240.

The generation amount prediction unit 210 may predict the amount of generation based on external environment information related to a corresponding small-scale power resource among solar energy, wind energy, intellectual energy, wave energy, and bio energy, and power generation facility conditions.

The generation amount prediction unit 210 may predict the amount of generation by period (eg, fractional, hourly, daily, etc.) for each individual small-scale power resource unit or a grouped group power resource unit.

Here, the external environment information is, for example, the amount of sunlight in the case of solar energy, the wind speed and direction in the case of wind energy, the geothermal temperature in the case of intellectual energy, the wave height and direction in the case of wave energy, and the bio energy in the case of bio energy. It can mean the weight of the mass.

In addition, the power generation facility condition may include, for example, power generation facility product information, power generation efficiency information, installation location information, line loss information, and the like.

Specifically, when the small-scale power resource is, for example, solar energy, wind energy, or wave energy with relatively high prediction uncertainty, the generation amount prediction unit 210 uses the weather forecast data to locate the small-scale power resource unit. The corresponding meteorological information may be quantified in stages, and the amount of power generation may be predicted using the quantified meteorological information and the conditions of the power generation facility registered in advance of the small-scale power resource unit 100.

In addition, the power generation amount prediction unit 210 may predict the amount of power generation over time by reflecting the change of weather information over time.

Accordingly, the power generation amount prediction unit 210 may predict an output amount in consideration of past power generation amount, weather data, and past power demand amount.

When the power brokerage management device 200 is connected to the power transaction device 300, the power brokerage management device 200 may be connected through an authentication process set as an brokerage trader. For example, the power brokerage management apparatus 200 may register a member, register an account, register a contract, register a facility, and the like in advance, and perform a registration test for each small-scale power resource or collective power resource.

Subsequently, the monitoring unit 220 monitors the actual output amount for the predicted output amount for each small power resource unit 100 in real time. To this end, the monitoring unit 220 may receive an actual output amount measured from each small-scale power resource unit 50 in real time.

As an example, the control unit 240 analyzes the monitoring situation for each individual small-scale power resource unit 100 or grouped aggregate power resource unit by period using the predicted output amount and the measured actual output amount, and shows the analyzed monitoring situation. It can be controlled to output in various ways through an output unit (display unit) that is not.

The control unit 240 may be a processing unit that controls the generation amount prediction unit 210, the monitoring unit 220, and the calculation unit 230 to perform overall processing for power transaction brokerage.

The power brokerage management apparatus 200 may include a weather information collection unit 250 that collects weather forecast data in order to use the weather forecast data. For example, the meteorological information collection unit 250 may collect weather forecast data by accessing the Meteorological Administration server, the Korea Astronomical Research Institute server, or the like, or may collect weather forecast data using its own measuring means.

In addition, the power brokerage management apparatus 200 according to the present invention includes a database unit 260 that stores information about an authenticated business operator, power generation facility condition information, and daily generation amount information for each small-scale power resource unit 100 can do.

A power brokerage transaction business operator operating the power brokerage management device 200 may generate revenue by receiving a brokerage fee from the power resource provider of the small power resource unit 100.

The power brokerage management device 200 determines the next day's predicted output amount (the next day's forecasted generation amount minus the next day's forecasted demand), and the brokerage business operator operating the power brokerage management device 200 determines the total amount of power trading to be sold to the market. You can decide.

The power transaction device 300 may receive a prediction output amount through the power brokerage management device 200.

Here, the present invention can increase the stability of power transaction by minimizing the error between the predicted output amount and the actual output amount.

Accordingly, in the present invention, when the operator of the small-scale power resource unit 100 fails to meet the planned sales capacity of the electric power to be sold, the profit distributed to the intermediary transaction operator among the total revenue increases, and conversely, the intermediary transaction operator predicts the output amount. If not, it can be achieved in a profit model structure in which the profits distributed to the operators of the small power resource unit 100 among the total profits increase.

The maximum planned sales capacity per hour can be calculated based on Equation 1 below.

Here, Cmax is the maximum planned sales capacity of the small power resource provider per hour, P _f is the predicted output amount of the small power resource unit, and Δ is the monthly average reliability of the small power resource unit.

In order to improve the prediction accuracy of renewable energy resources, reliability is introduced, and depending on the reliability, it is reflected in the distribution of profits between small power resource providers and power trading intermediaries, and small power resources may try to maximize reliability to maximize income. .

Since the power resource brokerage transaction method of the present invention changes the profit distribution by introducing reliability, small power resource providers strive to accurately select their power sales volume, and brokerage business operators strive to make predictions more accurate to predict power generation. In order to increase the transaction stability of the output of small-scale power resources with high volatility, the reliability of each generation resource is applied.

The maximum planned sales capacity (Cmax) per hour is the maximum planned sales output capacity of the small power resource provider predicted by the brokerage business operator, and the maximum planned sales capacity is the reliability of the small power resource unit in the predicted output volume of the small power resource unit. By reflecting the calculation, small power resource providers are encouraged to induce efforts to increase reliability, and small power resource providers can select the planned sales capacity within a range below the maximum planned saleable capacity calculated by the brokerage business operator.

The planned sellable capacity (C) is the capacity selected by the small power resource provider within the range of the maximum planned sellable capacity (Cmax), and the small power resource provider selects a lower planned sellable capacity (C), the higher the reliability. Revenue decreases, and the higher the planned sellable capacity (C) is selected, the better the profit, but the reliability may decrease.

The predicted output amount (P _f ) is obtained by subtracting the next-day demand from the next-day power generation amount predicted by the power brokerage management device 200. As the brokerage business operator incorrectly predicts the predicted output amount (P _f ), the profit decreases, and the predicted output amount ( The more accurately predicted P _f ), the more profits increase, and therefore, intermediary traders can strive to increase prediction accuracy.

The expected profit can be calculated based on the following equations 2 and 3.

Equation 2 is a case of a small power resource provider.

Equation 3 is a case of a brokerage business.

△ is the monthly average reliability of the small-scale power resource, SMP _t is the hourly power market price, t is the time, P _r is the actual output amount of the small-scale power resource, and δ is the time-based reliability of the small power resource, 0 ≤ δ ≤ 1.

The average monthly reliability (Δ) of the small power resource unit 100 can be calculated as in Equation 4 below.

According to Equation 4, the average monthly reliability (Δ) may be a value obtained by dividing a value obtained by multiplying the sum of days × time × time, and reliability (δ) for the number of days by 30 days × 24 hours = 720 hours.

The yield error rate can be calculated as (P _r /C) × 100.

The calculation table of the reliability (δ) by time of the small power resource department is shown in Table 1 below.

Fulfillment rate
Less than 70%
70% ~ 96%
More than 97%
δ 0.7 0.96 One

Referring to Table 1, if the actual output capacity fulfillment rate relative to the planned sales capacity (C) is less than 70%, the hourly reliability (δ) is 0.7, if the actual output capacity fulfillment rate is 70% ~ 96%, 0.96, and if the actual output capacity fulfillment rate is 97% or more. It can be counted as 1.

3 is a graph showing the relationship between the planned sales available capacity (C), the actual output amount (P _r ) of the small power resource unit, and the predicted output amount (P _f ) of the small power resource unit, the uppermost being the actual output amount (P _r ), and Below, it is composed of the predicted output volume (P _f ), the maximum planned sales capacity (Cmax), and the planned sales capacity (C) for each color, and the size of the remaining parts is relatively small compared to the size of the planned sales capacity (C). It shows that the interval between the maximum planned sales capacity (Cmax), the predicted output quantity (P _f ), and the actual output quantity (P _r ) from the planned sales available capacity (C) is close.

Referring to FIG. 3, as a case where the actual output amount (P _r ) of the small-scale power resource unit is larger than the predicted output amount (P _f ) and the planned sales capacity (C) of the small-scale power resource unit, C <P _f <P _r As a case, it indicates that the prediction in the power brokerage management apparatus 200 has failed.

At this time, the small power resource provider may be given a reliability (δ) = 1 (average monthly reliability (△) increase).

The settlement capacity of a small power resource provider becomes the actual output amount (P _r) , so that the amount of profit corresponding to the actual output amount (P _r ) is generated, and the settlement capacity of the brokerage business operator becomes 0 (zero), so there may be no profit.

4 is a case where C <P _r <P _f , in the graph from top to bottom, predicted output amount (P _f ), actual output amount (P _r ), maximum planned sales capacity (Cmax), planned sales capacity (C) It consists of the order of.

Referring to FIG. 4, when the actual output amount of small-scale power resources (P _r ) is larger than the planned sales available capacity (C), as an ideal case, the small-scale power resource provider may be given a reliability (δ) = 1 (monthly average Reliability (△) increase).

At this time, the settlement capacity of the small power resource provider may be C×△, and the small power resource provider may generate a profit corresponding to the settlement capacity.

The settlement capacity through the power brokerage management device 200 operated by the brokerage business operator is (Pr-C)+{C×(1-△)}, and a profit corresponding to this settlement capacity may be generated. The condition of FIG. 4 may correspond to the most ideal case.

5 is a case in which P _r <C <P _f , in the graph, from the top to the bottom, the predicted output amount (P _f ), the maximum planned sales capacity (Cmax), the planned sales capacity (C), and the actual output amount (P _r ) It consists of the order of.

Referring to FIG. 5, a case in which the actual output amount of small-scale power resources P _r is smaller than the planned sales available capacity C. Accordingly, it indicates that the prediction of the output amount by the power brokerage management apparatus 200 has failed.

At this time, the implementation of the power output of the small power resource provider is a failure, and the reliability (δ) of the small power resource provider may decrease (the average monthly reliability (△) decreases).

Thus, the adjustment capacity of the small-scale power resource providers is the actual output quantity (P _r), the actual output quantity (P _r) corresponding revenue minutes occurred, and adjustment capacity of the intermediate transaction operators in the 0 (zero) potential return minutes Become May be absent.

In the present embodiment, the description has been made on the basis of the small-scale power resource unit 100, but the present disclosure is not limited thereto, and the same may be applied to an aggregate power resource unit composed of a set of the small-scale power resource unit 100.

100: small power resource unit 120: management server
200: power brokerage management device 210: generation amount prediction unit
220: monitoring unit 230: settlement unit
240: control unit 250: weather information collection unit
260: database unit 300: power transaction device
△: Monthly average reliability of the Small Electric Power Resources Department
δ: Reliability by time of the small power resource department
δ _t : Reliability per hour of small power resources
C: planned sales capacity
C _t : Planned sellable capacity per hour
SMP _t : Market price of electricity per hour
Cmax: Maximum planned sales capacity per hour
P _f : Estimated output amount of small power resource department
P _r : Actual output amount of small power resource department

Claims (6)

As an intermediary transaction method of power produced from each small power resource unit or a collective power resource unit consisting of a group of small power resource units,
The reliability of the small-scale power resource unit is changed according to the comparison of the planned sales available capacity and actual output amount of each small-scale power resource unit or the collective power resource unit and the predicted output amount of each small-scale power resource unit through a power brokerage management device,
The power resource brokerage transaction method, characterized in that the settlement capacity, which is the profit portion of the small-scale power resource provider and the settlement capacity, which is the profit portion of the brokerage business operator operating the power brokerage management device, are determined according to the reliability.
The method of claim 1,
The reliability is the reliability by time of the small-scale power resource unit or the collective power resource unit,
The power resource brokerage transaction method, characterized in that the monthly average reliability of the small-scale power resource unit or the aggregate power resource unit is changed according to the time-specific reliability.
The method of claim 1,
When the actual output amount is larger than the predicted output amount, and when the actual output amount is smaller than the planned sales available capacity of the small power resource unit,
Power resource brokerage transaction method, characterized in that due to the failure of the prediction of the brokerage business operator, there is no settlement capacity, which is the profit portion of the brokerage business operator.
The method of claim 1,
The planned sales capacity of the small power resource department is defined as C, the actual output amount is defined as P _r , and the predicted output amount through the power brokerage management device is defined as P _f ,
When defining the monthly average reliability and the hourly reliability of the small power resource as △ and δ, respectively,
If C <P _r <P _f ,
Δ increases by giving δ = 1,
The settlement capacity, which is the profit share of the small power resource provider, is calculated by the following equation (1),
The power resource brokerage transaction method, characterized in that the settlement capacity, which is the profit share of the brokerage business operator operating the power brokerage management device, is generated by Equation 2.
[Equation 1]
Settlement capacity of small-scale power and resource department operators = C ×△

[Equation 2]
Settlement capacity of brokerage business operators operating power brokerage management devices = (Pr-C)+{C ×(1-△)}
The method of claim 1,
The planned sales capacity of the Ministry of Small Power Resources is defined as C, the actual output amount is defined as P _r , and the predicted output amount through the power brokerage management device is defined as P _f ,
When defining the monthly average reliability and the hourly reliability of the small power resource department as △ and δ,
In the case of P _r <C <P _f , the predicted output amount of the intermediary business operator and the performance of the output performance of the small power resource provider are considered as failure, so δ and △ decrease,
The settlement capacity, which is the profit share of the small-scale power resource provider, is calculated by Equation 3 below,
The power resource brokerage transaction method, characterized in that the settlement capacity, which is the profit share of the brokerage business operator operating the power brokerage management device, is generated by Equation 4.
[Equation 3]
Settlement capacity of small power resource operators = P _r

[Equation 4]
The settlement capacity of the brokerage transaction operator operating the power brokerage management device = 0
The method of claim 1,
The planned sales capacity of the Ministry of Small Power Resources is defined as C, the actual output amount is defined as P _r , and the predicted output amount through the power brokerage management device is defined as P _f ,
When defining the monthly average reliability and the hourly reliability of the small power resource department as △ and δ,
If C <P _f <P _r ,
Δ increases by giving δ = 1,
The settlement capacity, which is the profit share of the small power resource provider, is calculated by the following equation (5),
The power resource brokerage transaction method, characterized in that the settlement capacity, which is the profit share of the brokerage business operator operating the power brokerage management device, is generated by Equation 6.
[Equation 5]
Settlement capacity of small power resource operators = P _r
[Equation 6]
Settlement capacity of brokerage business operators operating power brokerage management devices = 0

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