• Plant Journal
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• v.11 no.4
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• pp.28-37
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• 2015

본 논문에서는 2012년 시행된 신재생에너지공급의무화제도(RPS)에 따른 민간발전사들의 RPS 의무이행 현황을 알아보고 신재생에너지 공급인증서의 발급량 부족 및 거래시장에서의 심한 가격변동을 발전사업자들의 RPS 이행시 장애요인으로 분석하였다. RPS시행 이전에 추진하여 최근 준공한 동두천복합발전소에 대한 RPS이행방안 구성결과 연평균 약 334억원의 의무이행비용이 산출되었으며, 해당비용을 당초 사업타당성 검토 기초자료에 반영한 결과 내부수익률이 계획대비 31.8% 저하됨을 알 수 있었다. 신재생에너지 의무공급량의 비율이 해마다 증가하여 2024년부터는 전년도 발전량의 10%를 신재생에너지로 공급해야 하는데 RPS 의무공급 대상자로의 편입 초기부터 10%의 의무공급량을 이행해야 하는 신규 발전소의 경우 의무이행비용 과다로 사업성은 더욱 낮아지므로 의무공급량의 비율을 기존의 12단계에서 17단계로 완화하는 방안을 제시하였다. 즉, 동두천복합발전소의 이행비용을 기준으로 최초 2%부터 매년 0.5%씩 점진적으로 10%까지 높였을 때 내부수익률은 6.23%로써 처음부터 10%의 비율로 공급할 경우 산출한 내부수익률 4.18%보다 약 49%의 사업성 향상 효과를 얻을 수 있어 제도개선이 민간발전사업 촉진에 기여할 것으로 판단된다.

• Journal of the Korea Convergence Society
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• v.11 no.8
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• pp.173-182
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• 2020

The government continuously improves the RPS system to expand the supply of renewable energy, but there has been criticism that more environmental aspects should be considered to reduce GHG emission. REC weights are differentiated according to renewable energy sources. Greenhouse gas emission is one of the decisive factors, and its value is set by experts' opinion. This study assigns LCA to get accurate value of GHG emission. The LCA calculates emitted greenhouse gases from entire process of fuel production, transportation, power plant construction, operation, and decommission. This study suggests a method to change the greenhouse gas reduction effect from the existing qualitative method to the quantitative method and evaluates them. As a result, the evaluation score is changed, but the tier interval is so large that it does not affect the REC weight. Therefore, this study suggests the way that directly reflect the greenhouse gas reduction effect in the REC weight.

• 한국신재생에너지학회:학술대회논문집
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• 2010.11a
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• pp.163.1-163.1
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• 2010

2030년까지 신재생에너지발전 비중을 11%로 높이겠다는 정책목표 달성을 위한 정부의 지원방안이 현행 발전차액지원제도(FIT)에서 2012년부터는 신재생에너지의무할당제(RPS)로 전환된다. 전원별로 정해진 발전량에 대해 정부가 일정한 가격으로 구매해주는 현행 제도 하에서 신재생에너지발전사업자는 중장기 가격을 보장받음으로써 수익성을 초기에 확정할 수 있는 장점이 있는 반면 정부 입장에서는 보급이 확대될수록 막대한 재정부담이 발생하고 경쟁을 통해 생산 비용을 낮추기 위한 유인이 부족한 단점이 있다. 이러한 단점을 보완하기 위해 도입되는 의무할당제는 일정 설비규모 이상의 발전사업자에게 신재생에너지발전 의무량을 부과하고 의무대상자가 의무이행의 수단으로 공급인증서(REC)를 발급받거나 구매하여 의무를 이행토록 하는 제도로서 공급인증서 가격 결정을 시장기능에 맡김으로써 신재생에너지 사업자간 경쟁을 촉진시켜 생산비용을 절감하고 정부의 재정부담을 완화하는 장점이 있는 반면 신재생에너지발전사업자 입장에서는 수익성 분석이 복잡해지고 리스크가 증가하는 문제점이 있다. 특히 발전용 연료전지를 활용한 발전사업의 경우 다른 신재생에너지원과 달리 설비투자비용(CAPEX) 외에 가스요금 및 핵심부품의 주기적인 교체 등을 위한 운영비용(OPEX)의 비중이 작지 않기 때문에 더욱 정밀한 분석이 필요하다. 본 연구에서는 신재생에너지발전사업자 입장에서 비용과 편익에 영향을 미치는 각 요소와 그 영향을 파악함으로써 발전용 연료전지의 경제성 분석을 시도해 보았다.

• Environmental and Resource Economics Review
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• v.31 no.1
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• pp.51-83
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• 2022

Renewable Portfolio Standards (RPS), one of the most commonly adopted regulation for renewable energy expansion since 2012, has the obvious advantage of inducing competition in power generation source and alleviating the government's financial burden. However, the abuse of credit multipliers and the use of national Renewable Energy Credits (RECs) have resulted in the distortion of RPS as a quantitative control policy. Just as no face value 10 years ago can hold its real value, this paper highlights for the first time that 27.8% of total renewable obligations over the total RPS period were not actually met due to REC inflation and the consequent decline in the value of renewable energy generation. In addition, the distortion of face/real value of REC causes problems in interoperability with other government policies such as RE100 and Emission Trading System.

• Journal of the Korea Convergence Society
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• v.12 no.6
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• pp.139-150
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• 2021

Currently, the RPS(Renewable Portfolio Standard) is the policy which supplies new and renewable energy. Power generation companies with large capacity should produce renewable energy or secure through the purchase of REC (Renewable Energy Certificates) as mandatory. The government has revised the REC weight several times, which weights each energy source by evaluating the economic and social value of renewable energy sources, and revised the mandatory supply ratio to gradually increase. This study helps to find the impact of policies on related industries. In this study, time-series analysis and regression analysis on the capacity of PV(Photovoltaics) facilities as a dependent variable were performed to analyze the effect of the revision of the REC weight for photovoltaic power generation and the amount of mandatory supply for renewable energy. As a result, it was statistically assessed that the revision of the REC weight and the increase in the mandatory supply has a significant effect on the increase in the amount of PV facilities.

• Journal of Energy Engineering
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• v.19 no.4
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• pp.251-257
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• 2010

Korea have a plan to enforce the Renewable Portfolio Standard(RPS) in 2012 for climate change action and effective use of energy but because of lack of renewable energy resources and limits of technology development, it will be hard to fullfill a target for RPS obligation in domestic power generation sector and woodchip biomass cofiring with coal combustion is the one of the alternative methods of the goal. Woodchip biomass cofiring with coal combustion is easy to approach technical design and has competitiveness of $CO_2$ & renewble energy certificate benefit and also has much lower generation cost than any other renewable energy resources. Because of that reason, woodchip biomass cofiring with coal combustion should be needed to fullfill the goal for RPS obligation in domestic power generation sector with midlong-term direction.

• Journal of Climate Change Research
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• v.5 no.1
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• pp.1-12
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• 2014

With continued economic growth, Korea has seen an increase in the nighttime activities of its citizens as hours of activity have extended into night. There is an increasing trend in energy consumption related to citizens' nighttime activities. In order to analyze ideas for an efficient replacement of the power consumption of streetlights and for profit generation by applying grid-type solar systems, this study used an RETScreen model. Through energy analysis and cost analysis, the application benefit and viability of grid-type solar street light systems were analyzed. With analysis result of a total weekly power generation of 114 kWh via a grid-connected solar streetlight system, it was shown that the net present value of a grid-connected solar street light system is 155,362 KRW, which would mean a payback period of about 5.2 years, and as such, it was shown that profit could be generated after about 6 years. In addition, if the grid-connected solar power generation system proposed by this study is to be applied, it was shown that 401,935 KRW in profit could be generated after the 20-year useful life set for the solar system. In addition, the sensitivity analysis was performed taking into account the price fluctuations of SMP, maintenance. As a result, a payback period has increased by 1~2 years, and there were no significant differences. Because the most important factor that affect the economic analysis is the cost of supply certification of renewable energy, a stable sales and acquisition of this certification are very important. the Seoul-type Feed in Tariff(FIT) connected to other institutions will enable steady sales by confirming to purchase the certification for 12 years. Therefore, if those issues mentioned above are properly reflected, Central-grid PV system project will be able to perform well in the face of unfavorable condition of solar PV installation.

• Journal of Energy Engineering
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• v.24 no.3
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• pp.74-81
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• 2015

Currently, the government is encouraging the introduction of energy storage system to reduce carbon emissions and peak power demand. The government is planning the cumulative capacity of ESS of 2GW in 2020. By utilizing charge and discharge of the ESS, it is possible to sell the surplus power to utility and electricity market. This paper suggests the model that economic feasibility of energy storage system for planning the construction of power generation facilities in 2035. Our results of simulation indicate the energy storage plan of utility for constructing renewable energy facilities is need to incentives from the government to encourage power utilities and expansion of ESS.

• New & Renewable Energy
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• v.20 no.1
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• pp.15-25
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• 2024

This study analyzes the economic feasibility of agrivoltaics in South Korea. The key findings are as follows. It was ascertained that an amendment to the Farmland Act, which currently has an 8-year permit period, is necessary to ensure the economic feasibility of agrivoltaic projects. Furthermore, economic feasibility improves when agrivoltaic projects are financed, as against cases without financing. Furthermore, the availability of low-interest loans through financial support programs significantly enhances economic feasibility. Scaling up projects leads to cost savings due to economies of scale, while community-based agrivoltaic initiatives generate higher revenue through the acquisition of additional Renewable Energy Certificates. These factors can help improve the economic feasibility of agrivoltaic projects. These incentives are emphasized as they can serve as a source of funding to foster community acceptance of agrivoltaic projects.

• Environmental and Resource Economics Review
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• v.29 no.1
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• pp.91-111
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• 2020

While the renewable energy portfolio standard (RPS) is in place to expand the scale of renewable energy generation, the power producer can obtain the renewable energy credit (REC) and use it as an incentive to operate the facility. RECs secured by solar power generation can be traded through spot market or fixed price contracts, and, in the spot market trading, power producers are exposed to the uncertainty of REC spot price. In this study, real option analysis is conducted to analyze the optimal threshold of REC spot price for the conversion of REC trading method by power producer considering the uncertainty of REC spot price. We calculated the optimal threshold of REC spot price that can convert the trading method of REC from spot market to fixed price contract. In conclusion, the spot market trading is a rational trading method when considering the uncertainty of REC price, but the fixed price bidding is a rational trading method when not considering the uncertainty of REC price.