KR20210058372A - Apparatus and method for evaluating economics of electric power distribution system according to sunlight power station - Google Patents

Abstract

Disclosed are an apparatus and method for evaluating the economic feasibility of an electric power distribution system according to the construction of a distributed sunlight power station. The apparatus for evaluating the economic feasibility of an electric power distribution system according to the construction of a distributed sunlight power station according to an aspect of the present invention includes: a factor input part that receives benefit factor information and cost factor information used for economic evaluation of an electric power distribution system according to the construction of a distributed sunlight power station; a benefit calculation part for calculating the benefits of the electric power distribution system according to the construction of the sunlight power station based on the benefit factor information; a cost estimation part for estimating the cost of the electric power distribution system according to the construction of the sunlight power station based on the cost element information; and an economic feasibility analysis part for analyzing economic feasibility according to the construction of the sunlight power station based on the benefit value calculated by the benefit calculation part and the cost value estimated by the cost estimation part.

Description

A device and method for evaluating the economic feasibility of the distribution system according to the construction of a distributed solar power plant {APPARATUS AND METHOD FOR EVALUATING ECONOMICS OF ELECTRIC POWER DISTRIBUTION SYSTEM ACCORDING TO SUNLIGHT POWER STATION}

The present invention relates to an apparatus and method for evaluating the economic feasibility of a distribution system according to the construction of a distributed solar power plant, and more specifically, investment in the configuration and facilities of a distribution system when a small-scale solar power plant is constructed with distributed power in the distribution system. It relates to an apparatus and method for evaluating the economic feasibility of a distribution system according to the construction of a distributed solar power plant that can automatically evaluate the economic value for

In the case of energy generation using fossil fuels, new energy generation projects are being studied due to the problem of finite resources. There is such a new energy generation business, that is, a power generation business using solar power among new and renewable energy. In addition, the number of generation companies using such solar power is gradually increasing, and new and renewable energy generation companies sell power produced by power plants to power companies.

However, in the process of selling power, such a power generation company self-checks the amount of power generation and calculates the settlement amount by multiplying the self-checked power generation amount by the monthly average SMP (system limit price per time slot). Because it can be reflected, there is a problem in that power generation operators can obtain excess profits.

Currently, 4,800 small-scale photovoltaic power generation businesses with less than 1,000 kW are all handwritten or documented in the process of registering a power generation business operator, reviewing grid connection, PPA contract, power generation metering, power generation monitoring, power generation verification, and power generation calculation. . One-Stop service technology development is necessary for automated power generation measurement using AMI, grid connection review for the entire cycle from power plant registration to power generation calculation, and business economics evaluation.

In addition, as the grid connection review and project economic evaluation are made manually, it takes a considerable amount of time to construct a new solar power plant, and resources such as manpower and costs are wasted. In particular, regarding the review of distribution system connection, there is a problem that considerable manpower and time are required by the person in charge of KEPCO manually reviewing the review of distribution system connection based on the documents submitted by the power generation company to KEPCO.

Accordingly, when a small-scale solar power plant is constructed with distributed power in the distribution system, there is a need for a technology development capable of automatically evaluating the economic value for investment in the configuration of the distribution system and facilities.

As a prior art related to the present invention, there is Registered Patent Publication No. 10-1051098 (announced on July 21, 2011, title of the invention: distribution system facility investment priority determination system and storage medium).

The present invention was conceived to improve the above-described problems, and an object according to an aspect of the present invention is to construct a distribution system and economic value for investment in facilities when constructing a small-scale solar power plant with distributed power in the distribution system. It is to provide an apparatus and method for evaluating the economic feasibility of a distribution system according to the construction of a distributed solar power plant that can automatically evaluate.

The problem to be solved by the present invention is not limited to the problem(s) mentioned above, and another problem(s) not mentioned will be clearly understood by those skilled in the art from the following description.

The apparatus for evaluating the economic feasibility of a distribution system according to the construction of a distributed solar power plant according to an aspect of the present invention receives information on a benefit element and information on a cost element used for evaluating the economic feasibility of the distribution system according to the construction of a distributed solar power plant. An element input unit, a benefit calculation unit that calculates the benefits of the distribution system according to the construction of the solar power plant based on the benefit factor information, and a cost estimate that estimates the cost of the distribution system according to the construction of the solar power plant based on the cost element information And an economics analysis unit for analyzing economic feasibility of the solar power plant construction based on the government and the benefit value calculated by the benefit calculating unit and the cost value estimated by the cost estimating unit.

The apparatus for evaluating economic feasibility according to the present invention may further include an element sensitivity analysis unit that analyzes the sensitivity of the economic evaluation index according to the change of each element included in the benefit element information and the cost element information.

배출량 감소 효과 편익 중 적어도 하나의 편익을 연산할 수 있다. In the present invention, the benefit calculation unit includes a power generation investment delay benefit, congestion cost reduction benefit, fuel cost substitution effect benefit, environmental cost saving effect benefit, and

At least one of the benefits of reducing emissions can be calculated.

In the present invention, the benefit calculator may calculate a power generation investment delay benefit using the following equation.

[Equation]

Power generation investment delay benefit = Increased amount of distributed power acceptance rate [kW] × Capacity credit [%]) × {(Unit cost of construction of an alternative power plant [1,000 won/kW] + Unit price of an alternative power plant connection facility [1,000 won/kW]) × (Life of solar power generation [Year]/Replacement power plant life [year])+(Operating maintenance cost [1,000 won/kW·year] + Connection facility maintenance unit cost [1,000 won/kW·year])/((Discount rate [%]×(1+discount rate[%) ]) ^{Life of solar power generation[years]} )/((1+discount rate[%]) ^{Life of solar power generation[years]} -1))}

In the present invention, the benefit calculator may calculate a congestion cost reduction benefit using the following equation.

[Equation]

Congestion cost reduction benefit = Increased amount of distributed power acceptance rate [kW] × Annual solar power generation utilization rate [%] × Transmission congestion unit price [1,000 won/kW]/((Discount rate [%]×(1+discount rate [%]) ^{Solar power generation Lifespan[years]} )/((1+discount rate[%]) ^{Solar power generation lifespan[years]} -1))

In the present invention, the benefit calculator may calculate the fuel cost substitution effect benefit by using the following equation.

[Equation]

Fuel cost substitution effect Benefit = Increased amount of distributed power acceptance rate [kW] × Annual solar power generation utilization rate [%] × Alternative generator fuel cost unit price [1,000 won/kW]/((Discount rate [%]×(1+discount rate [%]) ^{Solar power Power generation life [year]} )/((1+discount rate [%]) ^{Solar power generation life [year]} -1))

In the present invention, the benefit calculator can calculate the benefit of reducing environmental cost by using the following equation.

[Equation]

Environmental cost reduction benefit = Increased amount of distributed power acceptance rate [kW] × Annual solar power generation utilization rate [%] × Environmental cost unit price [1,000 won/kW]/((Discount rate [%]×(1+Discount rate [%]) ^{Solar power Power generation life [year]} )/((1+discount rate [%]) ^{Solar power generation life [year]} -1))

In the present invention, the benefit calculating unit may calculate the benefit of the CO ₂ emission reduction effect by using the following equation.

[Equation]

CO ₂ emission reduction effect Benefit = Increased amount of distributed power acceptance rate [kW] × Annual solar power generation utilization rate [%] × CO ₂ emission unit price [1,000 won/kW]/((Discount rate[%]×(1+discount rate[%]) ^{Solar power generation lifetime[years]} )/((1+discount rate[%]) ^{Solar power generation lifetime[years]} -1))

In the present invention, the cost estimating unit includes at least one of a capacity of a solar power plant to be built in the distribution system, a distribution system reconstruction facility item, a distribution system reconstruction facility unit price, a distribution system reliability security facility item, and a distribution system reliability security facility unit price. Based on the cost factor information, the cost of facility expansion due to reconfiguration of the distribution system and the cost of facility expansion to secure system reliability can be estimated.

In the present invention, the economical analysis unit calculates a total benefit value by calculating at least one benefit calculated by the benefit calculating unit, calculating a total cost value by calculating at least one cost estimated by the cost estimating unit, and the A benefit-cost ratio, which is a ratio of the total benefit value and the total cost value, is calculated, the calculated benefit-cost ratio is compared with '1', and economic feasibility can be analyzed based on the comparison result.

In another aspect of the present invention, a method for evaluating the economic feasibility of a distribution system according to the construction of a distributed solar power plant includes information on the convenience factor used in the element input unit to evaluate the economic feasibility of the distribution system according to the construction of a distributed solar power plant from an external system, and Receiving cost element information, a benefit calculating unit calculating a benefit of the distribution system according to the construction of the solar power plant based on the benefit element information, and a cost estimating unit for the construction of the solar power plant based on the cost element information Estimating the cost of the distribution system according to the method, and an economical analysis unit analyzing the economic feasibility of the solar power plant construction based on the benefit value calculated by the benefit calculating unit and the cost value estimated by the cost estimating unit. .

The present invention may further include the step of analyzing the sensitivity of the economic evaluation index according to the change of each factor included in the benefit factor information and the cost factor information, after the step of analyzing the economic feasibility, by the factor sensitivity analysis unit.

In the present invention, in the step of calculating the benefits, the benefit calculation unit calculates at least one of a power generation investment delay benefit, congestion cost reduction benefit, fuel cost replacement effect benefit, environmental cost saving effect benefit, and CO _{2 emission reduction effect benefit.} can do.

In the present invention, the step of analyzing the economics includes the economical analysis unit calculating a total benefit value by calculating at least one benefit calculated by the benefit calculating unit, and calculating the at least one cost estimated by the cost estimating unit. Calculating a cost value, calculating a benefit-cost ratio, which is a ratio of the total benefit value and the total cost value, by the economic efficiency analysis unit, and comparing the calculated benefit-cost ratio with '1', and the comparison Analyzing economic feasibility based on the results may be included.

The device and method for evaluating the economic feasibility of a distribution system according to the construction of a distributed solar power plant according to an embodiment of the present invention are the most economical by automatically reviewing the economic value of the distribution system when a solar power plant is constructed on a distribution line. It can be used for valuation of efficient cost investment.

The device and method for evaluating the economic feasibility of the distribution system according to the construction of a distributed solar power plant according to another embodiment of the present invention contributes to the review of the change in economic value according to the benefits and cost factors that change over time, thereby developing and introducing facilities in the future. Can contribute to strategy and planning.

An apparatus and method for evaluating the economic feasibility of a distribution system according to the construction of a distributed solar power plant according to another embodiment of the present invention are economic benefits and input at a national level according to an increase in the acceptance rate of a distributed small-capacity solar power plant introduced nationwide. It can contribute to the establishment of support strategies and policies through the economic value evaluation of the introduction of a distributed small-capacity solar power plant by comparing the cost factors.

Meanwhile, the effects of the present invention are not limited to the above-mentioned effects, and various effects may be included within a range that is apparent to a person skilled in the art from the contents to be described below.

1 is a conceptual diagram of an apparatus for evaluating economic feasibility of a distribution system according to the construction of a distributed solar power plant according to an embodiment of the present invention.
2 is a block diagram showing an apparatus for evaluating the economics of a distribution system according to the construction of a distributed solar power plant according to an embodiment of the present invention.
3 is a flowchart illustrating a method of evaluating the economics of a distribution system according to the construction of a distributed solar power plant according to an embodiment of the present invention.

Hereinafter, an apparatus and method for evaluating the economics of a distribution system according to the construction of a distributed solar power plant according to an embodiment of the present invention will be described with reference to the accompanying drawings. In this process, the thickness of the lines or the size of components shown in the drawings may be exaggerated for clarity and convenience of description.

In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to the intention or custom of users or operators. Therefore, definitions of these terms should be made based on the contents throughout the present specification.

Further, the implementation described herein may be implemented in, for example, a method or process, an apparatus, a software program, a data stream or a signal. Although discussed only in the context of a single form of implementation (eg, only as a method), the implementation of the discussed features may also be implemented in other forms (eg, an apparatus or program). The device may be implemented with appropriate hardware, software and firmware. The method may be implemented in an apparatus such as a processor, which generally refers to a processing device including, for example, a computer, a microprocessor, an integrated circuit or a programmable logic device, or the like. Processors also include communication devices such as computers, cell phones, personal digital assistants (“PDAs”) and other devices that facilitate communication of information between end-users.

1 is a conceptual diagram of an apparatus for evaluating economic feasibility of a distribution system according to the construction of a distributed solar power plant according to an embodiment of the present invention.

Referring to FIG. 1, the apparatus 100 for evaluating the economic feasibility of the distribution system according to the construction of a distributed solar power plant is linked to an external system 10, and information and cost of the benefit elements of the distributed solar power plant from the external system 10 It is possible to acquire element information, and analyze the economic feasibility of the solar power plant 20 construction by using the obtained benefit element information and cost element information.

The external system 10 is, for example, a system such as a distribution information system (NDIS) 11, a metering data management system (MDMS) 12, a power transaction system (PTS) 13, and an e-government 3.0 Open API. I can.

For example, the amount of power generation of the solar power plant 20 may be measured using the amount of reverse active power that is metered by an electronic meter installed at the grid connection terminal of the solar power plant 20. Power generation weighing data that has been remotely metered is primarily collected in the metering data management system (MDMS) (12) through the remote meter reading system (ADCS: Automatic Data Collection System) (14) installed at the regional headquarters, and ESB (Enterprise Service Bus) Acquisition of weighing data in real time through In addition, the amount of insolation, sunlight hours, and geographic/point information necessary for the solar power generation business economic evaluation can be obtained through the e-Government 3.0 Open API, and the power supply and demand and system limit price information can be obtained from the Power Transaction System (PTS) (13). Can be obtained from. And the distribution system geographic information necessary for the grid connection review can be obtained from the distribution information system (NDIS) (11).

2 is a block diagram showing an apparatus for evaluating the economics of a distribution system according to the construction of a distributed solar power plant according to an embodiment of the present invention.

Referring to FIG. 2, the apparatus 100 for evaluating the economics of the distribution system according to the construction of a distributed solar power plant according to an embodiment of the present invention includes an element input unit 110, a benefit calculating unit 120, and a cost estimating unit 130. , An economical analysis unit 140, an element sensitivity analysis unit 150, and a result output unit 160.

The element input unit 110 receives information on a benefit element and information on a cost element used to evaluate the economic feasibility of a distribution system according to the construction of a distributed solar power plant. Here, the benefit factor information is an element for calculating the quantitative economic value for the benefit item, for example, the capacity of a small-capacity solar power plant additionally built in the distribution system, the peak contribution of the small-capacity generation amount, or a capacity credit calculated in an excess level method, Construction cost of an alternative power plant, operation and maintenance cost of an alternative power plant, construction cost of an alternative generator connection facility, maintenance cost of an alternative generator connection facility, new solar power plant life, replacement generator life, discount rate, solar power generation to be constructed It may include the annual utilization rate of, transmission congestion cost, fuel cost of an alternative generator, environmental cost of an alternative generator, and carbon dioxide emission cost of an alternative generator. At this time, the target of the replacement power plant, construction cost unit price, operation and maintenance cost unit price, lifespan, discount rate, etc. can be used as an estimated value estimated using information used in the previous construction or the average value of the previous construction.

For reference, the replacement power plant means that the power plant that was originally operating no longer operates due to the increase in distributed power, and at this time, it means a power plant that is not operated, that is, is replaced. For example, it may mean an LNG power plant, and the construction cost of an alternative power plant, an operation and maintenance cost of an alternative power plant, a construction cost of a connection facility of an alternative generator, a maintenance cost of a connection facility of an alternative generator, and the like may be values set through past data.

Power transmission congestion cost unit price, transmission congestion cost unit price, fuel cost unit price of an alternative generator, environmental cost unit price of an alternative generator, carbon dioxide emission unit price of an alternative generator, and the like may be preset values.

The cost factor information is an element for calculating the quantitative economic value of the cost item.For example, the capacity of a small-capacity solar power plant to be built in addition to the distribution system, the item of the distribution system reconstruction facility, the unit price of the distribution system reconstruction facility, the facility to secure the reliability of the distribution system. It may include items, equipment cost, etc. for securing reliability of the distribution system. Here, the distribution system reconfiguration facility may mean a facility that is reconstructed for the construction of a solar power plant, and the distribution system reliability securing facility is a protection facility, and may include a circuit breaker, an inverter, and a capacitor that distributes voltage to the front end of the distributed power supply. have. Such cost factor information may use the previously stored same construction cost, and may be a value estimated by reflecting a changed factor. For example, cost factor information may use an estimated value, an average value of previous construction, and the like.

,

, 분진 등 환경비용 절감 효과 편익, CO₂ 배출량 감소 효과 편익 등을 포함할 수 있다. The benefit calculation unit 120 receives the benefit factor information from the factor input unit 110 and calculates the benefit of the distribution system according to the construction of the solar power plant based on the benefit factor information. At this time, the calculation of the benefits of the distribution system according to the construction of a distributed small-capacity solar power plant is the benefit factors obtained from the side of the distribution system due to the construction of a small-capacity solar power plant.

,

, Benefits such as environmental cost reduction effects such as dust, and benefits from the effect of reducing _{CO 2 emissions.}

The power generation investment delay benefit refers to a benefit generated when the construction of a power plant is delayed due to a solar power plant, and the benefit calculator 120 may calculate the power generation investment delay benefit using Equation 1 below.

[Equation 1]

Power generation investment delay benefit = Increased amount of distributed power acceptance rate [kW] × Capacity credit [%]) × {(Unit cost of construction of an alternative power plant [1,000 won/kW] + Unit price of an alternative power plant connection facility [1,000 won/kW]) × (Life of solar power generation [Year]/Replacement power plant life [year])+(Operating maintenance cost [1,000 won/kW·year] + Connection facility maintenance unit cost [1,000 won/kW·year])/((Discount rate [%]×(1+discount rate[%) ]) ^{Life of solar power generation[years]} )/((1+discount rate[%]) ^{Life of solar power generation[years]} -1))}

Transmission congestion cost benefit is that when distributed power is increased, the use of the transmission line is reduced because it is not necessary to use the existing transmission line to supply the electricity generated from a long distance, which is caused by the decrease in the utilization rate of the transmission line. It can mean the benefit of being. Accordingly, the benefit calculating unit 120 may calculate the power transmission congestion cost benefit in consideration of the reduced usage rate of the transmission line in the power transmission congestion cost unit price.

That is, the benefit calculator 120 may calculate a congestion cost reduction benefit using Equation 2 below.

[Equation 2]

Congestion cost reduction benefit = Increased amount of distributed power acceptance rate [kW] × Annual solar power generation utilization rate [%] × Transmission congestion unit price [1,000 won/kW]/((Discount rate [%]×(1+discount rate [%]) ^{Solar power generation Lifespan[years]} )/((1+discount rate[%]) ^{Solar power generation lifespan[years]} -1))]

Fuel Cost Substitution Effect Benefit refers to the benefit generated when power generation is replaced by solar power generation, and since the fuel cost unit price of solar power generation is '0', it can be calculated based on the fuel cost unit price of the LNG power generation that is being replaced. Accordingly, the benefit calculating unit 120 may calculate the fuel cost substitution effect benefit by using Equation 3 below.

[Equation 3]

Fuel cost substitution effect Benefit = Increased amount of distributed power acceptance rate [kW] × Annual solar power generation utilization rate [%] × Alternative generator fuel cost unit price [1,000 won/kW]/((Discount rate [%]×(1+discount rate [%]) ^{Solar power Power generation life [year]} )/((1+discount rate [%]) ^{Solar power generation life [year]} -1))

The environmental cost reduction benefit refers to the environmental cost reduction effect that occurs when power generation is replaced by solar power generation. For example, the carbon, CO ₂ , NO _x, etc. emitted by the generator replaced by photovoltaic power generation. It can mean the benefits arising from the mitigation. Accordingly, the benefit calculating unit 120 may calculate the benefit of reducing environmental cost by using Equation 4 below.

[Equation 4]

Environmental cost reduction benefit = Increased amount of distributed power acceptance rate [kW] × Annual solar power generation utilization rate [%] × Environmental cost unit price [1,000 won/kW]/((Discount rate [%]×(1+Discount rate [%]) ^{Solar power Power generation life [year]} )/((1+discount rate [%]) ^{Solar power generation life [year]} -1))

배출량 감소 효과 편익을 연산할 수 있다. The benefit operation unit 120 uses Equation 5 below

Emission reduction effect benefits can be calculated.

[Equation 5]

CO ₂ emission reduction effect Benefit = Increased amount of distributed power acceptance rate [kW] × Annual solar power generation utilization rate [%] × CO ₂ emission unit price [1,000 won/kW]/((Discount rate[%]×(1+discount rate[%]) ^{Solar power generation lifetime[years]} )/((1+discount rate[%]) ^{Solar power generation lifetime[years]} -1))

As described above, the benefit calculation unit 120 may calculate a power generation investment delay benefit, congestion cost reduction benefit, fuel cost replacement effect benefit, environmental cost reduction effect benefit, and CO ₂ emission reduction effect benefit, respectively.

The cost estimating unit 130 receives cost element information from the element input unit 110 and estimates the cost of a distribution system according to the construction of a solar power plant based on the received cost element information. That is, the cost estimating unit 130 includes at least one of the capacity of the solar power plant to be built in the distribution system, the item of the distribution system reconstruction facility, the unit price of the distribution system reconstruction facility, the item of the facility item for securing the reliability of the distribution system, and the unit price of the facility for securing the reliability of the distribution system. Based on the cost factor information, the cost of facility expansion due to reconfiguration of the distribution system and the cost of facility expansion to secure system reliability can be estimated.

In other words, the cost factors incurred in the distribution system side due to the construction of a distributed small-capacity solar power plant, consisting of facility expansion costs due to reconfiguration of the distribution system, and facility expansion costs for securing system reliability, and are input from the element input unit 110. Based on the received cost factor information, it can be calculated as an estimated value according to the location of the distributed power installation through data from the distribution information system (NDIS).

The economics analysis unit 140 analyzes the economics of the solar power plant construction based on the benefit value calculated by the benefit calculation unit 120 and the cost value estimated by the cost estimating unit 130.

The economic feasibility analysis unit 140 may evaluate economic feasibility based on a ratio between the present value of the benefit and the present value of the cost. Here,'present value' refers to the temporal value at the present time at which the benefits (conveniences and benefits) and costs that will occur in the future are discounted. In the analysis of alternatives, if an appropriate social discount rate is applied, an alternative with a benefit-cost ratio greater than 1 can be judged as an investment project with economic feasibility. If the ratio is greater than 1, the better alternative can be evaluated.

Accordingly, the economical analysis unit 140 calculates a total benefit value by calculating at least one benefit calculated by the benefit calculating unit 120, and calculating the at least one cost estimated by the cost estimating unit 130 to calculate the total cost value. Is calculated, the ratio of the total benefit value and the total cost value (hereinafter referred to as'benefit-cost ratio') is calculated, the calculated benefit-cost ratio is compared with '1', and the economic feasibility is based on the comparison result. Analyze. In this case, if the benefit-cost ratio is greater than '1', the economical analysis unit 140 may determine that there is a profitability, and if it is lower than '1', the profitability is low.

For example, if there are 10 solar power plant construction sites, each construction site's benefit-cost ratio is calculated, and the site with the highest calculated benefit-cost ratio is economical, so the site is the first to be constructed. You can proceed.

As described above, the economics analysis unit 140 may generate an economical analysis result according to the construction of a small-scale solar power plant based on the calculated benefit value and the estimated cost value.

The element sensitivity analysis unit 150 analyzes the sensitivity of the economic evaluation index according to the change of each element included in the benefit element information and the cost element information. That is, in the result of economic analysis, the values of factors such as discount rate, benefit unit price, cost unit price, etc. may change, and the result of economic analysis may change according to the change of each element. For example, if the unit price of item A changes from 100 to 150, the benefit-cost ratio changes, and accordingly, the result of economic analysis changes. Therefore, it is necessary to understand how much each factor included in the benefit factor information and the cost factor information affects the economics. Accordingly, the element sensitivity analysis unit 150 may analyze the sensitivity of each element using a regression analysis for each element included in the benefit element information and the cost element information. At this time, the sensitivity of each analyzed element can be used to establish a criterion for investment decisions.

The result output unit 160 may output an economic analysis result analyzed by the economy analysis unit 140 and an element sensitivity analysis result analyzed by the element sensitivity analysis unit 150. Here, the economic analysis result may be a benefit-cost ratio, and the factor sensitivity analysis result may be a benefit-cost ratio according to changes in each factor. Users can make investment decisions based on the results of economic analysis and factor sensitivity analysis.

Meanwhile, the element input unit 110, the benefit operation unit 120, the cost estimation unit 130, the economic analysis unit 140, the element sensitivity analysis unit 150, and the result output unit 160 execute programs on the computing device. Each may be implemented by a processor or the like required for it. In this way, the element input unit 110, the benefit calculation unit 120, the cost estimation unit 130, the economic analysis unit 140, the element sensitivity analysis unit 150, and the result output unit 160 are implemented in physically independent configurations. Or it may be implemented in a form that is functionally classified within one processor.

When constructing a small-scale solar power plant with distributed power in the distribution system, the economical evaluation device 100 configured as described above may evaluate the economical efficiency in consideration of the benefits and cost factors of the small-scale solar power plant.

On the other hand, the economic evaluation apparatus 100 disclosed herein is a computing environment (for example, a personal computer, a server computer, a handheld or laptop device, a mobile device (mobile phone, PDA, media player, etc.)), a multiprocessor system, and consumer electronics. Devices, minicomputers, mainframe computers, distributed computing environments including any of the aforementioned systems or devices, etc.). The computing environment includes a processor (e.g., a central processing unit (CPU), a graphic processing unit (GPU), a microprocessor, an application specific integrated circuit (ASIC), Field Programmable Gate Arrays (FPGA), etc.)), memory (e.g.: Volatile memory (e.g. RAM, etc.), non-volatile memory (e.g. ROM, flash memory, etc.), magnetic storage, optical storage, etc.), input devices (e.g. keyboard, mouse, pen, voice input device, touch Input devices, infrared cameras, video input devices, etc.), output devices (e.g. displays, speakers, printers, etc.) and communication connections (e.g. modems, network interface cards (NIC), integrated network interfaces, radio frequency transmitters/receivers, etc.) Ports, USB connections, etc.) may include interconnections with each other (eg, peripheral component interconnection (PCI), USB, firmware (IEEE 1394), optical bus structure, network, etc.).

3 is a flowchart illustrating a method of evaluating the economics of a distribution system according to the construction of a distributed solar power plant according to an embodiment of the present invention.

Referring to FIG. 3, the element input unit 110 receives benefit element information and cost element information used to evaluate the economic feasibility of a distribution system according to the construction of a distributed solar power plant from an external system (S310).

When step S310 is performed, the benefit calculation unit 120 calculates the benefit of the distribution system according to the construction of the solar power plant based on the received benefit factor information (S320). At this time, the benefit calculation unit 120 may calculate a power generation investment delay benefit, congestion cost reduction benefit, fuel cost replacement effect benefit, environmental cost saving effect benefit, CO ₂ emission reduction effect benefit, and the like.

When step S320 is performed, the cost estimating unit 130 estimates the cost of the distribution system according to the construction of the solar power plant based on the cost element information (S330). At this time, the cost estimating unit 130 includes at least one of the capacity of a photovoltaic power plant to be built in the distribution system, a distribution system reconstruction facility item, a distribution system reconstruction facility unit price, a distribution system reliability security facility item, and a distribution system reliability security facility unit price. Based on the cost factor information, the cost of facility expansion due to reconfiguration of the distribution system and the cost of facility expansion to secure system reliability can be estimated.

Meanwhile, in the present embodiment, it has been described that step S330 is performed after step S320, but steps S320 and S330 may be performed at the same time, or step S320 may be performed after performing step S330.

When step S330 is performed, the economics analysis unit 140 calculates a benefit-cost ratio based on the benefit value calculated by the benefit calculating unit 120 and the cost value estimated by the cost estimating unit 130, and calculated benefit- The economic feasibility of the solar power plant construction is analyzed through the cost ratio (S340). That is, the economics analysis unit 140 calculates a total benefit value by calculating at least one benefit calculated by the benefit calculating unit 120, and calculating the at least one cost estimated by the cost estimating unit 130 to calculate the total cost value. Yields At this time, the economical analysis unit 140 can calculate the total benefit value by adding all the values of the power generation investment delay benefit, congestion cost reduction benefit, fuel cost substitution effect benefit, environmental cost saving effect benefit, and CO _{2 emission reduction effect benefit.} In addition, the total benefit value can be calculated by applying a weight to each benefit and then performing an addition operation. In addition, the economics analysis unit 140 may calculate a total cost value by adding the costs estimated by the cost estimating unit 130, or by applying a weight to each estimated cost and then performing an addition operation to calculate the total cost value. have. Then, the economics analysis unit 140 calculates the ratio of the total benefit value and the total cost value (benefit-cost ratio), compares the calculated benefit-cost ratio with '1', and based on the comparison result, the economic feasibility Analyze. In this case, if the benefit-cost ratio is greater than '1', the economical analysis unit 140 may determine that there is a profitability, and if it is lower than '1', the profitability is low.

When step S340 is performed, the element sensitivity analysis unit 150 analyzes the sensitivity of the economic evaluation index according to the change of each element included in the benefit element information and the cost element information (S350). In this case, the element sensitivity analysis unit 150 may analyze the sensitivity of each element by using a regression analysis for each element included in the benefit element information and the cost element information.

When step S350 is performed, the result output unit 160 outputs the economic analysis result analyzed by the economy analysis unit 140 and the element sensitivity analysis result analyzed by the element sensitivity analysis unit 150 (S360).

As described above, the apparatus and method for evaluating the economic feasibility of a distribution system according to the construction of a distributed solar power plant according to an embodiment of the present invention automatically review the economic value of the distribution system when a solar power plant is constructed on a distribution line. In addition, it can be used for valuation of the most economical and efficient cost investment.

The device and method for evaluating the economic feasibility of the distribution system according to the construction of a distributed solar power plant according to another embodiment of the present invention contributes to the review of the change in economic value according to the benefits and cost factors that change over time, thereby developing and introducing facilities in the future. Can contribute to strategy and planning.

An apparatus and method for evaluating the economic feasibility of a distribution system according to the construction of a distributed solar power plant according to another embodiment of the present invention are economic benefits and input at a national level according to an increase in the acceptance rate of a distributed small-capacity solar power plant introduced nationwide. It can contribute to the establishment of support strategies and policies through the economic value evaluation of the introduction of a distributed small-capacity solar power plant by comparing the cost factors.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is only illustrative, and those of ordinary skill in the field to which the technology pertains, various modifications and other equivalent embodiments are possible. I will understand. Therefore, the true technical protection scope of the present invention should be determined by the following claims.

100: economic evaluation device
110: element input unit
120: convenience calculation unit
130: cost estimation unit
140: Economic Analysis Department
150: element sensitivity analysis unit
160: result output section

Claims (19)

An element input unit for receiving information on a benefit element and information on a cost element used to evaluate the economic feasibility of a distribution system according to the construction of a distributed solar power plant;
A benefit calculating unit that calculates the benefit of the distribution system according to the construction of the solar power plant based on the benefit factor information;
A cost estimating unit for estimating a cost of a distribution system according to the construction of the solar power plant based on the cost element information; And
An economics analysis unit that analyzes the economic feasibility of the solar power plant construction based on the benefit value calculated by the benefit calculating unit and the cost value estimated by the cost estimating unit
Containing, the device for evaluating the economic feasibility of the distribution system according to the construction of a distributed solar power plant.
The method of claim 1,
The device for evaluating the economic feasibility of the distribution system according to the construction of a distributed solar power plant, characterized in that it further comprises an element sensitivity analysis unit that analyzes the sensitivity of the economic evaluation index according to the change of each element included in the benefit element information and the cost element information. .
The method of claim 1,
The benefit calculation unit,
Distribution system according to the construction of a decentralized solar power plant, characterized by calculating at least one of the benefits of power generation investment delay, congestion cost reduction, fuel cost substitution effect, environmental cost reduction effect, and CO _{2 emission reduction benefit.} Economical evaluation device.
The method of claim 3,
The benefit calculator calculates a power generation investment delay benefit using the following equation.
[Equation]
Power generation investment delay benefit = Increased amount of distributed power acceptance rate [kW] × Capacity credit [%]) × {(Unit cost of construction of an alternative power plant [1,000 won/kW] + Unit price of an alternative power plant connection facility [1,000 won/kW]) × (Life of solar power generation [Year]/Alternative power plant life [year])+(Operation and maintenance cost [1,000 won/kW·year] + Connection facility maintenance unit cost [1,000 won/kW·year])/((Discount rate [%]×(1+discount rate[%) ]) ^{Life of solar power generation[years]} )/((1+discount rate[%]) ^{Life of solar power generation[years]} -1))}
The method of claim 3,
The benefit calculator calculates the congestion cost reduction benefit using the following equation.
[Equation]
Congestion cost reduction benefit = Increased amount of distributed power acceptance rate [kW] × Annual solar power generation utilization rate [%] × Transmission congestion unit price [1,000 won/kW]/((Discount rate [%]×(1+discount rate [%]) ^{Solar power generation Lifespan[years]} )/((1+discount rate[%]) ^{Solar power generation lifespan[years]} -1))
The method of claim 3,
An apparatus for evaluating economic feasibility of a distribution system according to the construction of a distributed solar power plant, characterized in that the benefit calculation unit calculates the fuel cost substitution effect benefit using the following equation.
[Equation]
Fuel cost substitution effect Benefit = Increased amount of distributed power acceptance rate [kW] × Annual solar power generation utilization rate [%] × Alternative generator fuel cost unit price [1,000 won/kW]/((Discount rate [%]×(1+discount rate [%]) ^{Solar power Power generation life [year]} )/((1+discount rate [%]) ^{Solar power generation life [year]} -1))
The method of claim 3,
An apparatus for evaluating the economic feasibility of a distribution system according to the construction of a distributed solar power plant, characterized in that the benefit calculation unit calculates the benefit of reducing environmental costs by using the following equation.
[Equation]
Environmental cost reduction benefit = Increased amount of distributed power acceptance rate [kW] × Annual solar power generation utilization rate [%] × Environmental cost unit price [1,000 won/kW]/((Discount rate [%]×(1+Discount rate [%]) ^{Solar power Power generation life [year]} )/((1+discount rate [%]) ^{Solar power generation life [year]} -1))
The method of claim 3,
The benefit calculator calculates the benefit of the CO ₂ emission reduction effect by using the following equation. The device for evaluating the economic feasibility of the distribution system according to the construction of a distributed solar power plant.
[Equation]
CO ₂ emission reduction effect Benefit = Increased amount of distributed power acceptance rate [kW] × Annual solar power generation utilization rate [%] × CO ₂ emission unit price [1,000 won/kW]/((Discount rate[%]×(1+discount rate[%]) ^{Solar power generation lifetime[years]} )/((1+discount rate[%]) ^{Solar power generation lifetime[years]} -1))
The method of claim 1,
The cost estimation unit,
Based on cost element information including at least one of the capacity of the solar power plant to be built in the distribution system, the item of the distribution system reconstruction facility, the unit price of the distribution system reconstruction facility, the item of the facility item for securing the reliability of the distribution system, and the unit price of the facility for securing the reliability of the distribution system, A device for evaluating the economic feasibility of a distribution system according to the construction of a distributed solar power plant, characterized in that estimating the cost of facility expansion due to reconfiguration of the distribution system and the cost of facility expansion to secure system reliability.
The method of claim 1,
The economic analysis unit,
A total benefit value is calculated by calculating at least one benefit calculated by the benefit calculating unit, calculating a total cost value by calculating at least one cost estimated by the cost estimating unit, and the total benefit value and the total cost value Distribution system according to the construction of a decentralized solar power plant, characterized in that a benefit-cost ratio, which is a ratio of is calculated, the calculated benefit-cost ratio is compared with '1', and economic feasibility is analyzed based on the comparison result. Economic evaluation device.
Receiving, from an external system, benefit factor information and cost factor information used for an economic evaluation of a distribution system according to the construction of a distributed solar power plant from an external system;
Calculating, by a benefit calculator, the benefit of the distribution system according to the construction of the solar power plant based on the benefit factor information;
Estimating, by a cost estimating unit, a cost of a distribution system according to the construction of the solar power plant based on the cost element information; And
Analyzing the economic feasibility of the solar power plant construction based on the benefit value calculated by the benefit calculating unit and the cost value estimated by the cost estimating unit, by an economical analysis unit
Containing, a method for evaluating the economics of the distribution system according to the construction of a distributed solar power plant.
The method of claim 11,
After the step of analyzing the economic feasibility,
The economic feasibility of the distribution system according to the construction of a distributed solar power plant, characterized in that the element sensitivity analysis unit further comprises the step of analyzing the sensitivity of the economic evaluation index according to the change of each element included in the benefit element information and the cost element information. Assessment Methods.
The method of claim 11,
In the step of calculating the benefit,
The benefit calculator calculates at least one of a power generation investment delay benefit, a congestion cost reduction benefit, a fuel cost substitution effect benefit, an environmental cost reduction effect benefit, and a CO _{2 emission reduction effect benefit.} Method of evaluating the economic feasibility of distribution systems according to.
The method of claim 13,
The benefit calculator calculates a power generation investment delay benefit using the following equation.
[Equation]
Power generation investment delay benefit = Increase in distributed power acceptance rate [kW]×Capacity credit [%])×{(Unit cost of construction of an alternative power plant [1,000 won/kW] + Unit price of an alternative power plant connection facility [1,000 won/kW])×(Life of solar power generation [Year]/Alternative power plant life [year])+(Operation and maintenance cost [1,000 won/kW·year] + Connection facility maintenance unit cost [1,000 won/kW·year])/((Discount rate [%]×(1+discount rate[%) ]) ^{Life of solar power generation[years]} )/((1+discount rate[%]) ^{Life of solar power generation[years]} -1))}
The method of claim 13,
The benefit calculator calculates the congestion cost reduction benefit using the following equation.
[Equation]
Congestion cost reduction benefit = Increased amount of distributed power acceptance rate [kW] × Annual solar power generation utilization rate [%] × Transmission congestion unit price [1,000 won/kW]/((Discount rate [%]×(1+discount rate [%]) ^{Solar power generation Lifetime[years]} )/((1+discount rate[%]) ^{Solar power generation lifetime[years]} -1))
The method of claim 13,
The method of evaluating the economic feasibility of the distribution system according to the construction of a distributed solar power plant, characterized in that the benefit calculation unit calculates the fuel cost substitution effect benefit using the following equation.
[Equation]
Fuel cost substitution effect Benefit = Increased amount of distributed power acceptance rate [kW] × Annual solar power generation utilization rate [%] × Alternative generator fuel cost unit price [1,000 won/kW]/((Discount rate [%]×(1+discount rate [%]) ^{Solar power Power generation life [years]} )/((1+discount rate [%]) ^{Solar power generation life time [years]} -1))
The method of claim 13,
The method of evaluating the economic feasibility of a distribution system according to the construction of a distributed solar power plant, characterized in that the benefit calculator calculates the environmental cost saving effect benefit using the following equation.
[Equation]
Environmental cost reduction benefit = Increased amount of distributed power acceptance rate [kW] × Annual solar power generation utilization rate [%] × Environmental cost unit price [1,000 won/kW]/((Discount rate [%]×(1+Discount rate [%]) ^{Solar power Power generation life [year]} )/((1+discount rate [%]) ^{Solar power generation life [year]} -1))
The method of claim 13,
The benefit calculator calculates the benefit of the CO ₂ emission reduction effect by using the following equation. The method of evaluating the economics of the distribution system according to the construction of a distributed solar power plant.
[Equation]
CO ₂ emission reduction effect Benefit = Increased amount of distributed power acceptance rate [kW] × Annual solar power generation utilization rate [%] × CO ₂ emission unit price [1,000 won/kW]/((Discount rate[%]×(1+discount rate[%]) ^{Solar power generation lifetime[years]} )/((1+discount rate[%]) ^{Solar power generation lifetime[years]} -1))
The method of claim 11,
The step of analyzing the economic feasibility,
Calculating a total benefit value by calculating at least one benefit calculated by the benefit calculating unit by the economic efficiency analysis unit, and calculating a total cost value by calculating at least one cost estimated by the cost estimating unit;
Calculating a benefit-cost ratio, which is a ratio of the total benefit value and the total cost value, by the economic efficiency analysis unit; And
And comparing the calculated benefit-cost ratio with '1', and analyzing economic feasibility based on the comparison result.

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