KR20180116774A - Integrated management system for renewable energy generation by using rental Energy Storage System - Google Patents

Abstract

The present invention includes: a renewable energy provider terminal for providing renewable energy generated by a renewable energy provider; a supply obligator terminal operated by the provider who generates electric energy of a reference power amount or more and has obligation to supply a predetermined ratio of the generated power amount as the renewable energy; and an integrated management terminal for charging an ESS with the renewable energy by renting the ESS to the renewable energy provider and supplying the renewable energy through a power system by discharging the charged renewable energy according to a predetermined schedule. Accordingly, the present invention can reduce facility investment costs and obtain excess profits.

Description

(Integrated Management System for Renewable Energy Generation by Using Rental Energy Storage System)

The present invention relates to a system for integrated management of renewable energy generation using a type of ESS lease, more specifically, to rent a part of a large-capacity ESS (Energy Storage System) to a renewable energy generation company, (System marginal price) and a REC (Renewable Energy Certificate) generated according to the amount of power that is charged in the time zone and discharged in a scheduled manner.

In order to disseminate and expand new and renewable energy, the government introduced RPS (Renewable Energy Certificate), a new renewable energy supply certificate system.

RPS is a system that makes it obligatory for generators to supply a certain percentage of total electricity generation as new and renewable energy. In order to create domestic market as well as business investment of new and renewable energy of domestic enterprises through this system.

As of 2017, 18 companies, which are the suppliers of RPS, are required to supply more than 500MW of power generation facilities.

FIG. 1 is a block diagram showing a transaction between a power generation company and KEPCO based on a systematic marginal price through a power exchange, and FIG. 2 is a diagram showing a structure in which a power generation company makes a transaction between a new- It is a block diagram.

If these suppliers fail to meet a certain percentage, they will be able to purchase a renewable energy certificate (REC) granted through the development of renewable energy.

In the case of REC, 1REC is awarded to new and renewable energy generation companies according to a certain amount of power generation (1MW), and it is a transferable right with the condition of validity of 3 years.

In the case of solar energy, depending on the type of installation, weights are given in the range of 0.7 to 5.0. In the system in which the photovoltaic system is connected to the ESS system, the highest weight is given as 5.0, It will be issued by the Corporation. REC's transactions can be traded at KPX (KPX) between renewable energy providers and suppliers according to market prices.

There are a number of prior art related to such REC and RPS, and related prior arts include "Method of evaluating utility profitability of power company by dynamic method (registration No. 10-1063947, hereinafter referred to as patent document 1). ) "Exists.

The invention of Patent Document 1 aims at analyzing the profitability effect of the electric power company due to the public benefit of the electric power demand management business and the demand management. It is designed to meet the required electric power demand in consideration of the electric power supply constraint and the reliability of the electric power market, Starting a reasonable demand management target considering the economics of the management business, and disclosing methods necessary for developing a computer simulation-based program that can analyze the profitability of the power company according to the demand management project in advance and utilize it in the development of demand management policy do.

As another related art, there is a " photovoltaic power generation amount processing system and method thereof (Registration No. 10-1086562, hereinafter referred to as Patent Document 2).

The invention of Patent Document 2 is a consumer information storage server that can store consumer information in connection with a solar power plant having a plurality of solar photovoltaic panels attached thereto; A matching server for assigning a code number assigned to each of the plurality of solar photovoltaic plates to a consumer; A transmission power DB server for detecting and storing a production power amount Ep produced from each solar photovoltaic board and transmitted to the power system according to each code number; A received power DB server for detecting an amount of power consumption Eg received by the consumer from the power system; And a transmission power DB server, based on data on the amount of power stored in the DB server and the data on the amount of power stored in the DB server. The production power amount Ep generated by the solar photovoltaic board and transmitted to the power system And a power amount comparison server for comparing the power consumption amount Eg and storing the result.

There is also a related-art patent document entitled " Fuel Cell Power Quantity Processing and Use System (Registration No. 10-1135306, hereinafter referred to as Patent Document 3).

The invention of Patent Document 3 is a consumer information storage server, which is associated with a fuel cell power plant having one or more fuel cell stacks and is capable of storing consumer information; A matching server that assigns a code number assigned to each of the one or more fuel cell stacks to the consumer; A transmission power DB server for detecting and storing the system transmission power amount Ef transmitted to the power system among the power amounts produced from each fuel cell stack; A receiving power DB server for detecting and storing the amount of power consumption Eg received by the consumer from the power system; And the transmission power amount (Ef) stored in the transmission power amount DB server and the data on the power consumption amount Eg stored in the reception power amount DB server, the system transmission power amount generated from the fuel cell stack and transmitted to the power system Ef) and a power consumption comparison server for comparing the power consumption Eg received by the consumer from the power system and storing the result, wherein a portion (Eh) of the electric energy produced from each fuel cell stack Which is directly supplied to a heat pump located inside and outside.

On the other hand, there is also a method and management system for electric power demand by predicting pre-demand electric power (Publication No. 10-2013-0045006, hereinafter referred to as patent document 4).

The invention of Patent Document 4 relates to a power demand management method and system by predicting the demand for electric power, and more particularly, to a power demand management method and system using the data disclosed in the Power Exchange (KPX) Forecasting and calculating the fluctuating purchase cost and fluctuating sales revenue by time zone based on the predicted power demand, the power generation plan and the electricity market price according to the predicted time zone, and then selecting the target day and time zone in which the power demand management is required, The present invention relates to a method and system for controlling power demand by predicting the demand for power, which can manage the participation notice and bid for power demand management in the target day and time zone and confirm the effect before and after the execution of power demand management.

In addition, as a related art, there is also a method and apparatus for verifying the result of calculation of electric market price (Publication No. 10-2014-0145715, hereinafter referred to as patent document 5).

The invention of Patent Document 5 relates to a method of verifying the result of calculation of a market price of electric power, and collecting data on a plurality of determination factors based on calculation of a systematic marginal cost (SMP) and a systematic marginal price from a data collection unit database , A step of performing statistical analysis on the collected data by the statistical analysis unit, and a step of determining whether or not the systematic marginal price is abnormal through the statistical analysis of the anomaly detection unit.

However, these prior art technologies could not be an alternative technology for the new settlement computerization system of ESS leasing and the settlement method of REC to the solar power generation companies among the renewable energy generation companies.

Registration No. 10-1063947 Registration No. 10-1086562 Registration No. 10-1135306 Publication No. 10-2013-0045006 Publication No. 10-2014-0145715

The integrated management system for renewable energy using the ESS lease according to the present invention has been devised to solve the above-described conventional problems, and presents the following problems to be solved.

First, we want to provide a system that can reduce the capital investment cost of ESS facilities for new and renewable energy generation companies.

Second, we want to provide a system that can reduce the investment cost of photovoltaic power generation from the viewpoint of third parties other than the renewable energy power generation company, and build a business model of collaboration with the renewable energy generation company only by the facility investment of ESS.

Third, the automatic settlement of REC and SMP should be made between the renewable energy generation company and the third party, and they want to provide a business model that can demonstrate the synergy effect of mutual collaboration.

The solution of the present invention is not limited to those mentioned above, and other solutions not mentioned can be clearly understood by those skilled in the art from the following description.

The integrated management system for new and renewable energy using the ESS lease according to the present invention has the following problems in order to solve the above problems.

The integrated renewable energy generation management system using the ESS lease according to the present invention is operated by a renewable energy provider and is a renewable energy enterprise terminal providing renewable energy developed by the renewable energy provider; A supplier terminal operating on a company that is obliged to supply a certain percentage of the generated electricity with renewable energy, And charging the renewable energy to the ESS by renting an ESS (Energy Storage System) to the renewable energy provider, discharging the renewable energy charged in the ESS according to a predetermined schedule to transfer the renewable energy through the power system And an integrated management terminal for supplying the integrated management terminal.

The renewable energy of the renewable energy generation integrated management system using the ESS rental according to the present invention may be characterized by electric energy generated by photovoltaic.

The integrated management terminal of the integrated renewal energy management system using the ESS lease according to the present invention measures the total amount of electricity generated by the renewable energy provider and the amount of electricity generated by the renewable energy provider from the renewable energy provider terminal A power generation amount measuring unit; And a settlement unit for measuring an amount of electricity generated by subtracting the generation amount of time from the total amount of electricity generation and transmitting the measured amount of electricity generation to the renewable energy company terminal.

The integrated management terminal of the integrated renewal energy management system using the ESS lease according to the present invention is characterized in that the unified management terminal comprises a charge amount measuring unit for charging the ESS with the electric energy developed at the time of the renewable energy provider, ; And a settlement unit for calculating SMP for the amount of power charged in the time zone.

The integrated management terminal of the integrated renewal energy management system using the ESS lease according to the present invention may further include a discharge control unit for discharging the renewable energy charged in the ESS according to a predetermined schedule have.

The integrated management terminal of the integrated renewal energy management system using ESS rental according to the present invention may further include a discharge amount measuring unit for measuring a discharge amount of the renewable energy discharged by the discharge control unit .

The settlement unit of the renewable energy generation integrated management system using the ESS lease according to the present invention is characterized in that a wREC having a weight w corresponding to the discharge amount measured by the discharge amount measurement unit is received and received .

The settlement unit of the integrated management system for renewable energy using ESS rental according to the present invention may be characterized in that the wREC is sold and settled to the supply person terminal through the KPX.

The settlement unit of the new and renewable energy generation integrated management system using the ESS lease according to the present invention may settle the SMP to the renewable energy provider terminal and settle a predetermined REC from the wREC .

The predetermined REC of the integrated renewal energy management system using ESS rental according to the present invention can be arbitrarily set so that the difference from the wREC can be adjusted.

The integrated management system for renewable energy using the ESS lease according to the present invention having the above configuration provides the following effects.

First, for new and renewable energy generation companies, it is possible to reduce the capital investment cost due to the construction of ESS and at the same time to obtain the excess gain according to aREC.

Second, from the viewpoint of third parties, it is possible to realize profits by subtracting gross profits obtained from renewable energy generation companies at 5.0REC, so as to obtain benefits equivalent to the construction of photovoltaic power generation facilities.

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

FIG. 1 is a block diagram illustrating a transaction between a power generation company and KEPCO based on a system marginal price through a power exchange.
FIG. 2 is a block diagram showing a structure in which a power generation company is allowed to conduct a transaction between a renewable energy generation company and a REC.
3 is a block diagram illustrating the location and function of a new renewable energy generation integrated management system that mediates between the renewable energy generation company of FIG. 2 and the supply obligor according to an embodiment of the present invention.
4 is a block diagram illustrating the role of the integrated renewable energy management system in accordance with one embodiment of the present invention.
FIG. 5 is a block diagram illustrating each configuration of a new renewable energy generation integrated management system according to an embodiment of the present invention. Referring to FIG.
FIG. 6 is a power generation graph showing the total generation amount of the new and renewable energy generation company of FIG. 3 and the time generation amount of the specific time period.
FIG. 7 is a conceptual diagram showing that the renewable energy generation company of FIG. 3 performs voluntary settlement of a portion of the total power generation amount, which is the time-base power generation amount, is subtracted.
FIG. 8 is a conceptual diagram showing that the renewable energy generation integrated management system of FIG. 3 calculates 5.0 REC and SMP.
FIG. 9 is a conceptual diagram showing that the new renewable energy generation integrated management system of FIG. 3 discharges the charged amount of ESS, and then SMP and other RECs are settled to the renewable energy generation company.

The integrated management system for renewable energy using the ESS rental system according to the present invention may be modified in various ways and various embodiments may be used. Specific embodiments will be described in detail with reference to the drawings. 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.

FIG. 1 is a block diagram illustrating a transaction between a power generation company and KEPCO based on a system marginal price through a power exchange. FIG. 2 is a block diagram showing a structure in which a power generation company is allowed to conduct a transaction between a renewable energy generation company and a REC. 3 is a block diagram illustrating the location and function of a new renewable energy generation integrated management system that mediates between the renewable energy generation company of FIG. 2 and the supply obligor according to an embodiment of the present invention. 4 is a block diagram illustrating the role of the integrated renewable energy management system in accordance with one embodiment of the present invention. FIG. 5 is a block diagram illustrating each configuration of a new renewable energy generation integrated management system according to an embodiment of the present invention. Referring to FIG. FIG. 6 is a power generation graph showing the total generation amount of the new and renewable energy generation company of FIG. 3 and the time generation amount of the specific time period. FIG. 7 is a conceptual diagram showing that the renewable energy generation company of FIG. 3 performs voluntary settlement for a portion of the total generation amount, which is obtained by subtracting the time generation amount. FIG. 8 is a conceptual diagram showing that the renewable energy generation integrated management system of FIG. 3 calculates 5.0 REC and SMP. FIG. 9 is a conceptual diagram showing that the new renewable energy generation integrated management system of FIG. 3 discharges the charged amount of ESS, and then SMP and other RECs are settled to the renewable energy generation company.

First, referring to FIG. 1, a large number of power generation companies (1a ~ 1x) respectively generate a certain amount of electric energy by using their power generation facilities. These power generators will supply electric power to Korea Electric Power Corporation through Korea Power Exchange (KPX).

These power generators will supply electrical energy according to the principle of demand and supply by System Marginal Price (SMP).

In short, the power market is also the principle that the price of electricity is determined at the balance of supply and demand in the competitive market. The market price of the electricity market in Korea is 1 hour, The market price is determined on a day-to-day basis, and the market price is determined on a time-by-time basis in the point where the forecasted electricity demand curve and the supply curve formed by the generators participating in the supply bidding intersect.

More specifically, in the case of the marginal pricing method, the "development planning program" for determining the market price determines the generation of the generator and the output of power generation according to the principle of minimizing the cost of the generator participating in the supply bidding. The generator is treated as a MAGINAL PLANT and the marginal price, that is, the market price of the SMP, is determined.

Recently, in order to spread renewable energy, the government introduced a renewable energy duty quota system, which is called the Renewable Portfolio Standard (RPS). (The details are mentioned in the Background section, and redundant description is omitted.)

Companies that develop more than 500MW a year are obligated suppliers of RPS. They have to adapt more than a certain percentage of generation to renewable energy per year. (For details, please refer to the website of the Korea Energy Corporation.) The percentage of this increase is 2% in 2012, which is gradually increased year by year to 4.0% in 2017, 9.0% in 2022, and 10.0% % Of the total population.

Referring to FIG. 2, in the case of a renewable energy provider, for example, a solar power generation company (see 30) or a wind power generation enterprise (see 31), a certain percentage of the energy they have developed (4.0% in 2017 as described above) If you do not, you must purchase REC from renewable energy providers (see pages 30 and 31).

On the other hand, new and renewable energy companies are expected to acquire profit by SMP of electric energy according to the development of new and renewable energy as well as REC, which is a right to be transferred to renewable energy companies, 2x) to gain additional profits. REC also has a variable price depending on the market price through KPX. The details are related to the government's policy and are omitted.

In the case of renewable energy generation companies, REC, which is a valid right for a certain period (3 years), is multiplied by a weight every 1MWh to receive a REC. Depending on the installation type of renewable energy and different criteria, it is given a different weight. Of these, in the case of a system in which solar power generation facilities and ESS (energy storage system) facilities are linked (in the case of ESS facilities linked to solar power facilities), the maximum weight is given as 5.0, and 5.0REC is given instead of 1.0REC per 1MWh. .

Therefore, the present invention is not limited to the case where the third party, that is, the ESS 101 owned by a provider of the integrated management terminal 100, is rented to these renewable energy providers, more specifically, photovoltaic And it is aimed that the photovoltaic power generation company will be able to acquire a little more aREC than 0.7 ~ 1.5REC.

As shown in FIG. 3, the integrated renewable energy generation management system using the ESS lease according to the present invention rents the ESS 101, which is provided by itself, to a photovoltaic company in more detail than a renewable energy generation company These photovoltaic power generation companies are provided with an external shape equipped with an ESS.

3, the new renewable energy generation integrated management system using the ESS lease according to the present invention includes a renewable energy enterprise terminal 30, a supply obligatory terminal 2, and an integrated management terminal 100 ).

As shown in FIG. 3, the integrated management terminal 100 includes an ESS 101 and a PCS (Power Conversion System).

First, the new and renewable business terminal 30 is a type of power supply terminal that is operated by a renewable energy business and provides renewable energy developed by a renewable energy business.

As shown in FIG. 3, the supplier 2 can produce electric energy of 500 MW or more by itself, and 18 companies (the name of the specific company is omitted) as the current system.

The integrated management terminal 100 rents the ESS 101 to the renewable energy provider so that it can run a solar power generation business and discharges the renewable energy to the ESS 101 according to a predetermined schedule, It is a terminal of a company that supplies energy through the power system.

Referring to FIG. 4, the new and renewable energy generation company charges the ESS 101 from 'time zone', for example, from 10:00 am to 16:00 pm, and develops in the time zone other than that, , And then SMP settlement can be done. Simultaneous RECs can be obtained and additional profits can be obtained by trading directly through KPX.

5, the integrated management terminal 100 may include a power generation amount measurement unit 110 and a settlement unit 160. The integrated management terminal 100 may include a power generation amount measurement unit 110 and a settlement unit 160. [ can do.

First, the power generation amount measuring unit 110 can measure the total power generation amount of the new and renewable energy business operator and the time generation power of the new and renewable energy business operator from the renewable energy business terminal 2, respectively.

Then, the settlement unit 160 can calculate the amount of power generated by subtracting the time-period power generation amount from the total power generation amount, that is, referring to FIG. 6, for the power generation amount of the MP-TP. Of course, such settlement services can be made through agreements with renewable energy companies.

5 and 6, the integrated management terminal 100 is charged by the charging amount measuring unit 130 and the settlement unit having another function 160 < / RTI >

The charging amount measuring unit 130 charges the ESS with electric energy in the time zone (10h to 16h) of the renewable energy provider, and measures the amount of electric power charged at that time.

In such an ESS 101, the settlement unit 160 can settle the cost and / or the SMP with KEPCO.

Furthermore, as described above, the integrated management terminal 100 may discharge the electric energy charged in the ESS 101 according to a predetermined schedule. The integrated management terminal 100 may further include a discharge control unit 140 for discharging the electric energy.

In this case, as shown in FIG. 5, the integrated management terminal 100 may further include a discharge amount measuring unit 120 for measuring a discharge amount of the renewable energy discharged by the discharge control unit 140.

Here, the settlement unit 160 receives a REC with a weight w of 5.0, for example, 5.0REC.

In the case of such a wREC, for example, 5.0REC, as shown in FIGS. 3 and 4, the KPX exchange can trade according to the principle of the market economy. Such a function can be performed by the settlement unit 160 have.

As shown in FIG. 8, when the management terminal 100 is charged by TP, 5.0REC is issued for the scheduled discharge amount of the TP, and the SMP settlement is performed for the same.

Thereafter, the settlement unit 160 not only cleans the SMP by the amount discharged to the renewable energy provider, but also recovers (0.7 to 1.5) RECs corresponding to the amount of the scheduled discharged electricity that the renewable energy provider would have received without the ESS It is settled by the renewable energy provider terminal 30 and the aREC is additionally settled. In this case, the REC of the new and renewable energy provider is (0.7 ~ 1.5) REC and aREC, and the predetermined REC is adjusted so as not to exceed 5.0REC. Here, a is preferably set to 0.5 or the like as an embodiment, which can be adjusted by a contract or the like.

The following table is an exemplary table of a terminal 30 of a renewable energy provider, for example, a PV company, and an ESS rental service provider, that is, an integrated management terminal 100. Of course, such a process corresponds to an embodiment, and it is needless to say that these operators can be coordinated and computerized through agreement.

Renewable energy provider Integrated management terminal operator
1) At the end of each month, SMP + 1.0REC will be awarded from the power generation company and the Korea Energy Corporation for the amount of electricity obtained by subtracting the ESS service watt-hour accumulation amount from the PV watt hour accumulation amount.
(Eg 23,116 kWh - 17,493 kWh = 5,623 kWh x 170 won = 955,910 won)
2) SMP + 1.0REC will be paid to the ESS service watt-hour system accumulation amount at the end of each month from the integrated management terminal operator.
(17,493 kWh x 170 won = 2,973,810 won)
3) The incentive REC for the ESS service watt-hour system cumulative amount at the end of each month is received from the integrated management terminal operator.

1) Provide SMP + 1.0REC to the new and renewable energy provider for the accumulated amount of watt hour meter at the end of each month.
(17,493,000 x 170 won) = 2,973,810,000 won
2) The incentive REC is paid to the new and renewable energy provider at the end of each month for the accumulation amount of the rechargeable watt-hour meter.
3) At the end of each month, SMP + 5.0REC will be paid from the power generation company and the Korea Energy Corporation for the cumulative amount of the discharge electricity meter.
(15,743,700 x 85 won) + (15,743,700 x 85 x 5.0) = 8,772,739,500 won

(Time zone can be adjusted, of course) from 10:00 am to 6:00 pm In the time period from sunrise to 10:00 and sunset from 16:00 to the sunset, Can be sold.

In the time zone area 10 to 16h, the operator of the integrated management terminal, which is the provider of the ESS, performs the schedule discharge as described above. Such a schedule can be discharged within the time zone, It may discharge.

The scope of the present invention is defined by the claims, the parentheses used in the claims are not used for optional limitation but are used for the definite components and the description in parentheses is also interpreted as an essential component .

1: Generator terminal
2: Among the power generation companies,
10: Korea Power Exchange (KPX) terminal
20: Korea Electric Power Corporation (KEPCO) terminal
30: Renewable energy (photovoltaic) generator terminal
31: Renewable energy (wind power) generator terminal
40: Energy Industrial Complex Terminal
100: Integrated management terminal
101: Energy Storage System (ESS)
110: Power generation amount measuring section
120: Discharge amount measuring section
130:
140:
150: REC service fee
160:

Claims (10)

A renewable energy business terminal operated by a renewable energy provider and providing renewable energy developed by the renewable energy business;
A supplier terminal operating on a company that is obliged to supply a certain percentage of the generated electricity with renewable energy, And
The renewable energy is charged to the ESS by renting an ESS (Energy Storage System) to the renewable energy provider, and the renewable energy charged in the ESS is discharged according to a predetermined schedule to supply the renewable energy through the power system Wherein the integrated management terminal comprises an integrated management terminal that manages the ESS lease.
The method according to claim 1,
Integrated renewable energy generation management system using ESS rental, characterized by electric energy by photovoltaic.
2. The integrated management terminal of claim 1,
A power generation amount measuring unit for measuring a total power generation amount of the new and renewable energy provider and a power generation amount of the new and renewable energy provider from the renewable energy provider terminal; And
And a settlement unit for measuring an amount of electricity generated by subtracting the time-period power generation amount from the total power generation amount and transmitting the measured amount to the renewable energy company terminal.
2. The integrated management terminal of claim 1,
A charge amount measuring unit for charging the ESS with the electric energy developed at the time of the renewable energy provider and measuring the amount of electric power charged in the time zone; And
And a settlement unit for calculating SMP for the amount of electric power charged in the time zone.
5. The integrated management terminal of claim 4,
Further comprising a discharge controller for discharging the renewable energy charged in the ESS according to a preset schedule.
6. The integrated management terminal of claim 5,
Further comprising a discharge amount measuring unit for measuring a discharge amount of the renewable energy discharged by the discharge control unit.
7. The apparatus according to claim 6,
And a wREC assigned with a weight (w) corresponding to the discharge amount measured by the discharge amount measuring unit is given to the integrated management system.
8. The apparatus according to claim 7,
And the wREC is sold and settled to the supplier terminal through the KPX.
9. The apparatus according to claim 8,
Wherein the SMP is settled to the new and renewable energy provider terminal, and a predetermined REC is paid out from the wREC.
8. The method of claim 7, wherein the predetermined REC
And the difference amount from the wREC can be adjusted so that it can be set arbitrarily.

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