• 대한안전경영과학회지
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• 제19권4호
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• pp.157-167
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• 2017

Solar energy has been known as a successful alternative energy source, however it requires a large area to build power generation facilities compared to other energy sources such as nuclear power. Weather factors such as rainy weather or night time impact on solar power generation because of lack of insolation and sunshine. In addition, solar power generation is vulnerable to external elements such as changes in temperature and fine dust. There are four seasons in the Republic of Korea hereby variations of temperature, insolation and sunshine are broad. Currently factors that cause find dust are continuously flowing in to Korea from abroad. In order to build a solar power plant, a large area is required for a limited domestic land hereby selecting the optimal location for the plant that maximizes the efficiency of power generation is necessary. Therefore, this research analyze the optimal site for solar power generation plant by implementing analytic hierarchy process based on weather factors such as fine dust. In order to extract weather factors that impact on solar power generation, this work conducts a case study which includes a correlation analysis between weather information and power generation.

• 한국태양에너지학회 논문집
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• 제39권3호
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• pp.59-66
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• 2019

New and renewable energy forecasts are key technology to reduce the annual operating cost of new and renewable facilities, and accuracy of forecasts is paramount. In this study, we intend to build a model for the prediction of short-term solar power generation for 1 hour to 3 hours. To this end, this study applied two time series technique, ARIMA model without considering seasonality and SARIMA model with considering seasonality, comparing which technique has better predictive accuracy. Comparing predicted errors by MAE measures of solar power generation for 1 hour to 3 hours at four locations, the solar power forecast model using ARIMA was better in terms of predictive accuracy than the solar power forecast model using SARIMA. On the other hand, a comparison of predicted error by RMSE measures resulted in a solar power forecast model using SARIMA being better in terms of predictive accuracy than a solar power forecast model using ARIMA.

• 에너지공학
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• 제24권3호
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• pp.74-81
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• 2015

늘어나는 전력 수요와 탄소배출을 줄이기 위하여 정부는 신재생에너지 및 에너지저장장치 도입을 장려하고 있다. 정부 는 2020년까지 ESS 누적용량을 2GW로 확대할 예정이다. ESS 도입을 통하여 전력 피크를 줄일 수 있으며, 시간대별 차등요금제를 활용하여 남는 전력을 판매할 수 있다. 본 논문에서는 ESS 보급 확대에 따른 비용을 분석을 위한 모형을 제안하였으며, 2035년까지의 ESS 발전량과 발전단가를 분석하였다. 또한 ESS와 신재생에너지 연계에 따른 경제성 분석을 위하여 태양광발전 및 풍력발전 연계에 따른 사례연구를 진행하였고, ESS 보급 촉진을 위하여 정부의 추가적인 보급지원 정책이 필요함을 시사하고 있다.

• 한국농촌건축학회논문집
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• 제24권1호
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• pp.9-17
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• 2022

Rural spaces are increasingly valuable as areas for introducing renewable energy infrastructure to achieve carbon neutrality. Rural areas are the living grounds of rural residents, and the balance of conservation and development for rural areas is important for the introduction of reasonable facilities. In order to maintain a balance between development and preservation and to introduce reasonable renewable energy facilities, it is necessary to develop a current status survey and an effective survey method to utilize a space capable of introducing renewable energy facilities such as idle land and vacant houses. Therefore, this study was conducted to verify the readability using an unmanned aerial vehicle, and the main results are as follows. The detection of photovoltaic power generation facilities using unmanned aerial vehicles was effective in analyzing the location and area of photovoltaic panels located on the roofs of buildings, and it was possible to calculate the expected power generation by region through the area calculation of photovoltaic panels. The vacant house detection can be used to select an investigation target for an vacant house condition survey as it can identify damage to buildings that are expected to be empty houses, management status, and electricity supply facilities through aerial photos. It is judged that the unmanned aerial vehicle detection capability can be utilized as a method to improve the efficiency of investigation and supplement the data related to solar power generation facilities and vacant houses provided by public institutions. Although this study detected the status of solar power generation facilities and vacant houses through high-resolution aerial image analysis, as a follow-up study, automatic measurement methods using the temperature difference of solar power generation facilities and general characteristics of vacant houses that can be read from the air were investigated. If the deriving research is carried out, it is judged that it will be possible to contribute to the improvement of the accuracy of the detection result using the unmanned aerial vehicle and the expansion of the application range.

• 한국조경학회지
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• 제51권2호
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• pp.131-142
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• 2023

탄소배출을 감축하기 위한 태양광발전시설은 산림, 농지, 도시, 수상 등에 우후죽순처럼 설치되고 있다. 그러나 태양광발전시설의 설치 이후 관찰자에게 미치는 시각적 선호도 및 심리적 영향에 관한 연구는 부족한 실정이다. 이에 본 연구는 한국 최대 규모의 수상 태양광발전시설 합천댐을 대상으로 근경, 중경, 원경의 시(視)거리에 따라 촬영을 실시하였다. 획득한 이미지를 포토샵을 통해 수상 태양광발전시설을 유무에 대해 비교하여 총 50명 연구 대상자의 뇌파(EEG) 및 설문지 분석을 통해 수상 태양광발전시설 설치 전후의 심리적 변화 및 시각적 선호도를 분석하였다. 결과를 요약하면 다음과 같다. 첫째, 수상 태양광발전시설의 설치에 따라 연구 대상자의 심리적 변화 및 시각적 선호도에 소극적인 영향을 끼치고 있다. 둘째, 수상 태양광발전시설의 설치에 따른 심리적 변화는 연구대상자의 국적/성별/전공과는 상관없이 거의 모든 연구대상자들에게 영향을 끼치는 것으로 판단되었다. 셋째, 수상 태양광발전시설의 설치에 따른 시각적 선호도는 낮으며, 이는 수상 태양광발전시설로 인해 경관의 '친근성' 및 '자연성'에 부정적 영향을 주는 것을 알 수 있다. 또한 이런 시각적 선호도의 변화는 연구대상자의 성별/전공에 따른 차이가 있는 것으로 나타났다. 넷째, 시(視)거리에 따른 수상 태양광발전시설이 관찰자에게 끼치는 심리적 변화 및 시각적 선호도는 근경이 중경과 원경보다 높은 영향을 미치는 것으로 나타났다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2006년도 춘계학술대회 논문집 전기기기 및 에너지변환시스템부문
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• pp.365-368
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• 2006

The objective of this research is to investigate usage of 3KW photovoltaic-wind power hybrid generation system composed of 500W solar power generator and 400W wind power generator in a parallel circuit. In addition, solar radiation meter and wind monitor have been installed into each generation system to obtain the practical operating data that monitored in monthly, daily and hourly. These data that are independent to weather change and location would provide adequate generation output on average and cope with emergency situation in generation system In conclusion, based on this study, it could be considered for 3KW combined generation system to be gradually propagated to houses and small-size public facilities.

• 한국인터넷방송통신학회논문지
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• 제23권2호
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• pp.157-162
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• 2023

태양광발전 설비의 고장 중 서지에 의한 고장이 전체 고장률의 20% 차지하고 있으며 발전 중 수십에서 수백[A]의 에너지 방출과 인버터, 접속반 등의 전기적 손상은 전기안전사고로 이어지고 있다. 특히 낙뢰의 경우 전기회로에 이상 전압이 유기되어 절연을 파괴할 뿐만 아니라 이때 흐르는 전류는 화재의 원인이 되고 부품의 열화를 촉진하는 요인으로 작용한다. 이러한 작용으로 도심 밖에서 주택, 아파트, 관공서 등의 도심 내부로 확산하고 있는 태양광 발전장치의 전기 안전 문제가 대두되고 있다. 낙뢰는 필드 기반 및 전도성 전기 간섭을 유발하기에 이 효과는 케이블 길이 또는 도체 루프 증가와 관련하여 증가한다. 또한 서지는 태양광 모듈, 인버터 및 모니터링장치뿐만 아니라 건물 설비의 장치도 손상하기에 최종적으로는 태양광발전시스템의 화재로 인한 운영 중단과 이에 따른 재정손실을 유발하게 시킬 수 있다. 따라서 본 논문에서는 태양광발전시스템의 낙뢰발생으로 인한 화재 및 전기안전사고 증가로 인하여 재산피해 및 인명피해를 줄일 수 있는 목적으로 태양광발전장치의 낙뢰보호 시스템을 연구하고자 한다.

• 한국해양공학회지
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• 제32권4호
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• pp.279-286
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• 2018

The use of eco-friendly energy in the offshore plant system is expanding because conventional generators are operated by fossil fuel or natural gas. Eco-friendly energy, which replaces existing power generation methods, should be capable of generating the power for lighting protection equipment, airborne fault indication, parameter measurement, and others. Most of the eco-friendly energy used in offshore plant facilities is solar and wind power. In the case of using photovoltaic power, because the structure must be constructed based as flat solar panels, it can be damaged easily by the wind. Therefore, there is a need for a new generation system composed of a spherical structure that does not require a separate structure and is less influenced by the wind. Considering these characteristics, in this study we designed, fabricated, and tested a unit that could provide the most efficient spherical photovoltaic power generation considering wind direction and wind pressure. Our test results indicated that the proposed system reduced costs because it did not require any separate structure, used eco-friendly energy, reduced carbon dioxide emissions, and expanded the proportion of eco-friendly energy use by offshore plant facilities.

• 신재생에너지
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• 제17권3호
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• pp.16-23
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• 2021

Recently, the Korean government announced a plan to activate renewable energies, with focus on clean energy sources such as solar and wind power as the core and the goal of achieving carbon neutrality by 2050. Unlike other photovoltaic (PV) systems, offshore PV installations are advantageous for large-scale expansion because of the ease of securing sites; they also enable lowering the power generation costs based on construction of large-scale power facilities of megawatt class or higher owing to low noise and landscape damage. However, any power generation should proceed with consideration of the special environmental conditions of the ocean. Above all, when installing large-scale facilities, it is important to reduce fluctuations of the structure and secure stability to actively respond to waves. This study is concerned with the development of a floating body technology that actively responds to waves so as to enable commercialization of offshore solar power. A unit platform for research and development on offshore PV generation was installed in the Saemangeum sea, and the structural fluctuations and stability were analyzed to ensure conformity with the major performance indicators.

• 한국기후변화학회지
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• 제6권2호
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• pp.73-85
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• 2015

With 12 environmental basic facilities (EBF) in Busan, each business place's present situation of the operation of new and renewable energy as well as the feasibility to establish additional systems of utilizing solar energy (photovoltaic power generation system [PPGS] and solar heating system [SHS]) were investigated. Currently, with the environmental basic facilities, the new and renewable energies (such as, waste heat, biogas, PPGS, SHS, and small hydro power) can produce 195 GWh per year as electric power unit. Among the energy sources, except waste heat, biogas (154 GWh/yr) appears as the highest. Next, PPGS is the second most widely used system and produces 5,560 MWh/yr at 11 business places. Through a field survey, it appears that 19 business places of total 27 places at 12 EBFs have good locational conditions and they need an introduction of PPGS. Through it, it is investigated that it would be possible to produce 5,311 MWh/yr and to reduce $2,348tCO_2/yr$. And, it is identified that SHS can be additionally introduced in only 4 EBFs. This can reduce energy cost as much as one ten million won/yr and green-house gas as much as $28tCO_2/yr$. A cost-benefic analysis shows that the use of governmental support or private investment can be the most efficient way, when PPGS and SHS are introduced in EBFs.