계통연계형 마이크로그리드단지에 설치된 에너지관리장치의 최적화에 관한 연구

이재욱 경상대학교 융합과학기술대학원 2019 국내석사

현대 인류의 생활수준과 삶의 질이 비약적으로 향상되었지만 최근 지구온난화와 더불어 미세먼지에 대한 이슈가 세계적인 문제점으로 대두되고 있다. 이러한 문제점의 주요 원인중 하나로 화석연료를 에너지원으로 하는 발전설비의 급격한 증가를 제시되고 있으며, 전 세계적으로 원인해소를 위한 대안으로 신재생에너지 발전설비 증대를 주요 정책으로 채택하고 있다. 이러한 추세에 따라 대용량 발전설비의 비중은 줄이고 분산전원형태의 신재생에너지 발전설비의 연계기술에 대한 관심이 높아지고 있다. 본 논문에서는 높은 비율의 신재생에너지 공급이 가능한 마이크로그리드에서 태양광 및 풍력 등 신재생에너지 발전설비의 전력공급 불확실성에 따른 문제점을 최소화하고, 안정적인 전력공급을 위한 에너지관리시스템(EMS)의 최적화를 진행하였다. 신재생에너지의 공급 비율이 높을 경우에는 에너지저장장치(ESS)에 전력을 저장하고, 공급 비율이 낮을 경우에 에너지저장장치와 연계 계통(한전공급 전력)으로 전력을 공급하기 위해 태양광 및 풍력 발전설비의 전력공급 패턴을 분석하였다. 그리고 마이크로그리드에서 에너지관리시스템의 최적화를 통해 복합시스템(전력생산/소비/저장)에서 신재생에너지의 효율적인 활용과 안정적인 전력공급의 가능성을 확인하였다.

營農形太陽光 普及에 관한 硏究

김영오 경상국립대학교 융합과학기술대학원 2021 국내석사

본 연구의 목적은 태양광 발전설비를 농지에 공동으로 위치시켜 태양광 발전과 농업생산을 동시에 수행할 수 있는 영농형태양광 발전사업의 보급을 위해 경제성분석을 통한 사업성 있는 최적의 영농형태양광 사업모델을 찾고자 하는데 있다. 영농형태양광 경제성 분석을 위한 프로젝트명을‘영농형태양광 1 MW 발전사업’이라고 하고, 본인의 토지에 설치하는 경우, 토지 임대를 통하여 설치하는경우, 농어촌상생협력기금을 활용하는 경우를 순현재가치(NPV), 내부수익률(IRR), 비용편익비율(B/C Ratio)의 분석방법을 통해 경제성 분석을 하였다.본인의 토지에 영농형태양광을 설치하는 경우에는 순현재가치(NPV)는 71,494천원으로‘0’보다 크고, 내부수익률(IRR)은 5.15%로 기준 할인율인 4.7% 보다 크며, 비용편익비율(B/C Ratio)은 1.037로 사업성 판단 기준인‘1’보다 크므로, 세가지 모든 조건에서 사업성이 있는 걸로 나오고, 토지를 임대하여 영농형태양광을 설치하는 경우에는 순현재가치(NPV)가 –212,481천원으로‘0’보다 작고, 내부수익률(IRR)은 3.31%로 기준 할인율 4.7% 보다 작으며, 비용편익비율(B/C Ratio)은 0.889로 사업성 판단 기준인‘1’보다 작으므로, 세가지 모든 조건에 부합하지 못해 사업성이 없는 걸로 나왔다.또한, 농어촌상생협력기금을 활용하여 영농형태양광을 설치하는 경우에는 자기자본금 2억원을 제외한 나머지 18억원을 상생협력기금에서 지원을 받으므로, 순현재가치(NPV)는 1,618,314천원으로‘0’보다 크고, 내부수익률(IRR)은 78.95%로 기준 할인율인 4.7% 보다 크며, 비용편익비율(B/C Ratio)은 1.847로 사업성 판단기준인‘1’보다 크므로, 세가지 모든 조건에서 사업성이 있는 걸로 나와, 농어촌상생협력기금을 활용한 영농형태양광 사업모델이 영농형태양광의 보급을 위한 최적의 사업모델임을 확인할 수 있다.영농형태양광 발전사업의 확산을 위해 농어촌상생협력기금을 활용한 사업모델을 먼저 한국남동발전을 비롯한 6개 발전공기업을 중심으로 2021년 현재까지 출연된 721억원의 상생협력기금을 적극 활용하여 공기업별 연간 300 kW씩 10년사업을 했을 경우 현재 2.7 MW 대비 667%나 증가한 18 MW를 달성할 수 있을것으로 본다.향후에는 영농형태양광 발전사업의 전국적인 확산을 위해서는 사업 수익성 제고노력과 영농형태양광 기술개발 뿐만 아니라, 인허가 등의 제도정비 및 주민참여형 사업모델 개발 등 다양한 측면에서의 사업화 노력이 필요할 것으로 판단된다. The purpose of this study is to find the best agro-photovoltaic generating business model that can fulfill sunlight generation and agricultural production at the same time through economic analysis. The title of campaign for the economic analysis is 'Agro-Photovoltaic 1 MWProject.’ In case of installing on one’s own land, leased land and using farming and fishing village’s cooperstion fund are analysed by net present value (NPV), internal return rate (IRR), and cost-benefit ratio (B/C Ratio). In case of installing a agro-photovoltaic equipment on one’s own land, NPV would be 71,494,000 won which is greater than ‘0’, IRR would be 5.15% which is bigger than the base discount rate(4.7%) and B/C Ratio would be 1.037 which is larger than business feasibility criteria ‘1’. There is business feasibility in all three conditions. In case of installing a agro-photovoltaic equipment on leased land, NPV would be -212,481,000 won which is less than ‘0’, IRR would be 3.31% which is less than the base discount rate(4.7%), and B/C Ratio would be 0.889 which is less than business feasibility criteria ‘1’. Since it does not meet all three conditions, it is not businessable. In case of setting a agro-photovoltaic equipment up by farming and fishing village’s cooperation fund, about 1.8 billion won excluding equity capital (0.2 billion won) can be supported from the fund. By analysis, NPV would be 1,618,314,000 won which is greater than ‘0’, IRR would be 78.95% which is larger than the base discount rate(4.7%) and B/C Ratio would be 1.847 which is bigger than business feasibility criteria. We can figure out that the business model, utilizing the farming and fishing village’s cooperation fund is the most optimal option.By using the agro-photovoltaic generation project supported from the Rural Win-win Cooperation Fund, higher energy generation could be achieved. If each of six power generation public enterprises including KOEN(Korea South-East Power Co.) produce 300 kW for 10 years while utilizing the fund(about 72.1 billion won), 18 MW can be generated, which is 667% higher than current 2.7 MW. In the future, to spread out the agro-photovoltaic generation projects, numerous efforts need to be made in various ways, including enhancing business profitability, developing agro-photovoltaic technologies, reorganizing and improving the system such as licensing, and developing residentparticipatory business models.

신기후 체제하의 석탄화력 대체연료에 관한 연구

서진호 경상대학교 융합과학기술대학원 2017 국내석사

The efforts of countries to reduce GHG emissions worldwide, the Paris Agreement was signed. As a result, awareness of global climate change is being as more as widespread and detailed practices are being developed in many countries around the world for the detailed GHG mitigation measures. South Korea also submitted about 19.4% reduction plan to the United Nations by cutting 64.5 million tons in 2030 compared to BAU in the power generation sector. Therefore, the power generation industries in Korea have to minimize the generation of greenhouse gases and the emission of substances influenced by the atmospheric environment during the electric power production process. The economic value of the coal-fired power plant to be abolished is estimated to remain at around 5trn won from 2.5trn won. The generation company has known that the amount of carbon dioxide generated during the electricity production process was 204,246 thousand t-CO2 as of 2016. And we have analyzed the characteristics of solid, liquid, gaseous fuel, and wood pellet fuel as alternative fuels and have investigated the possibility as alternative fuels. As a result of testing the feasibility of fuel conversion to coal-fired power plants through the coal power generation test and the co-firing test of wood pellet as an alternative fuel, the environmental and combustibility were confirmed through the co-firing test results within the confinement ratio of 5% or less. And also, as a result of the operation of wood pellet 100% burning, the amount of sulfur oxide, nitrogen oxide, which are a secondary fine particle of the fine dust, was reduced by about 71.3% and 63% respectively. Conclusively, the economic feasibility of wood pellets has been judged to be a suitable fuel for RPS policies such as electricity sales revenue, REC sales, and avoidance of RPS penalties, as compared with a coal power generation.

건설공사의 안전 관련법 개선에 관한 연구

이기필 경상국립대학교 융합과학기술대학원 2024 국내석사

Looking at the recent status of accidents, the number of industrial accident deaths in Korea has been continuously decreasing from 992 in 2014 to 855 in 2020 (11% decrease), but the number of accident deaths in the construction industry has declined from 434 to 458 (5.5% increase). The construction industry accounts for more than 50% of all industrial accident deaths. The causes of construction accidents are very diverse, such as the complexity and enlargement of structures due to urban development, insolvent construction and bidding system problems due to low-cost bidding, application of new technologies and new construction methods, and inadequate systems that do not reflect construction site conditions. This study compares and analyzes the contents of the Occupational Safety and Health Act and the Construction Technology Promotion Act, which are representative laws of construction safety management, and seeks to find problems and improvement measures. The first problem is that the Occupational Safety and Health Act marks the construction industry among the entire industries in the law, paying attention to safety management of construction works, and reinforcing the safety management of construction works and supplementing the Occupational Safety and Health Act through the enactment of the Construction Technology Promotion Act. Due to the overlapping part, it takes time to understand the safety management contents of the Occupational Safety and Health Act and the Construction Technology Promotion Act. In addition, there are many foreigners in recent construction workers, which makes it difficult to understand and implement the contents of the law in Korean. Second, the departments in charge of the two laws are set up by the Ministry of Employment and Labor and the Ministry of Land, Infrastructure and Transport, respectively, which lacks efficiency. Third, the two laws have overlapping content, as each law separately stipulates similar tasks for the safety management organization and education at the construction site. Fourth, because risk assessment and safety review are separately conducted by the two laws, consistency and efficiency are insufficient. The Occupational Safety and Health Act prescribes risk assessment and confirmation before or during construction, and safety accident management. The Construction Technology Promotion Act implements a system to remove risk factors before construction by conducting safety reviews when designing construction works. Since the risk assessment and safety review conducted by the two laws are carried out by each of the two departments, feedback for safety management is difficult and consistent measures are difficult when problems arise, so it is judged that the efficiency of the results obtained by implementing the system for safety management is insufficient. Fifth, it takes a lot of time to implement the administrative procedure, as it is necessary to obtain approval of a hazard prevention plan and safety management plan with similar contents from each of the two organizations. Sixth, systematic and efficient cost execution is difficult due to the dualization of safety management costs. Occupational safety and health management costs in the Occupational Safety and Health Act are calculated by multiplying the construction cost by a certain rate according to the size of the construction, and the safety management costs in the Construction Technology Promotion Act are required to account for the cost required for safety management. The safety management costs stipulated in both laws can be sufficiently duplicated and executed, which is an obstacle to the efficient use of the budget. As an improvement plan, for effective safety management of construction works, the department in charge is unified with the Ministry of Land, Infrastructure and Transport, and the laws are integrated with the Construction Technology Promotion Act.If the accident rate and death rate are similar to the entire industry, safety management in all industrial fields It is reasonable to transfer to the Ministry of Employment and Labor, which is in charge of the job, and take charge of overall industrial safety management. Secondly, it is necessary to integrate the laws and regulations into one, and for detailed information, a plan is needed to make use of the strengths of the construction work safety management of the two laws and to compensate for the shortcomings. 1) The safety management organization follows the name and composition specified in the “Integration Guidelines for Hazard Risk Prevention and Safety Management Plan, 2007” of the Ministry of Land, Infrastructure and Transport. 2) Education is prepared by integrating the contents of the Occupational Safety and Health Act and the Construction Technology Promotion Act. 3) The administrative procedure needs a complementary system that, if the law is integrated, is reviewed by the Ministry of Employment and Labor and approved by the Ministry of Land, Infrastructure and Transport. 4) By unifying safety management costs, we establish reasonable standards for calculating safety management costs. 5) Reinforce feedback by integrating risk assessment and design safety review into one system. As for the improvement plan, it is proposed to revise the Occupational Safety and Health Act and the Construction Technology Promotion Act by referring to similar papers and cases of integration of laws. Since it is considered desirable for each committee member and department in charge to participate. The approximate adjustment bill is the improvement plan by newly establishing the safety management contents expressed in the Construction Technology Promotion Act “Chapter 5 Management of Construction Works, Section 2 Quality and Safety Management of Construction Works” as “Section 3 Safety Management of Construction Works”. Including the information presented in the section suggests a revision. I think a lot of discussion and consultation are needed for the integration of the two laws. Safety accidents in the construction industry may not be reduced if no one makes concessions and only claims my own territory. To reduce safety accidents in the construction industry, it is hoped that the improvement measures that analyze and propose the advantages and disadvantages of representative laws and regulations will be used for safety management in the construction industry. Key words: Occupational Safety and Health Act, Construction Technology Promotion Act, overlapping, legislation integration

소형 풍력발전시스템에 대한 분산전원으로서의 가능성 분석에 관한 연구

김학균 경상국립대학교 융합과학기술대학원 2023 국내석사

This paper investigates the feasibility of utilizing small wind power generation systems as distributed power sources in apartment houses. Apartment houses, widely used in urban areas, have a significant electricity demand. Therefore, based on wind speed data from the Korea Meteorological Administration in the Gyeongsangnam-do, this study explores suitable apartment houses for implementing small wind power generation systems. This study examines the potential of small wind power systems as a distributed power source by assessing their generation capacity, taking into account the average wind speed from the rooftop of an apartment building and considering IEC regulations. The research findings demonstrate that small wind power generation systems can effectively supply power to apartment houses, making them viable as distributed power sources. By further advancing zero-energy building technologies and providing various incentives, it is possible to expand the adoption of these systems, enabling stable and sustainable power supply while reducing energy costs and minimizing environmental impact.

정보통신기술(ICT) 기반 해상풍력발전소 현장 작업자 위치 추적 및 안전관리 시스템 개발 연구

남현석 경상국립대학교 융합과학기술대학원 2023 국내석사

This study delineates the development of a safety management system, leveraging Information and Communication Technology (ICT), specifically designed for workers at offshore wind power plants. In the current epoch, the global community is witnessing a paradigm shift towards carbon neutrality, with numerous nations and corporations establishing and striving towards net-zero targets. This shift necessitates a transition to sustainable energy systems, a critical task for the future of South Korea. Offshore wind power generation, in this context, emerges as a pivotal solution, offering environmental benefits as a renewable energy source and potential contributions to energy security and the establishment of sustainable energy systems. The principal objective of this research is the continuous enhancement of safety for workers operating in offshore wind power plants. To achieve this, we developed a location tracking and safety management system, incorporating a machine learning-based algorithm. This system utilizes sensor data to automatically identify human behavior, thereby enabling a more precise prediction of the behavior and status of offshore wind power plant workers. This predictive capability facilitates improved behavior pattern analysis and augments accident prevention rates. The findings of this research are anticipated to contribute significantly to the enhancement of safety in offshore wind power plants and bolster the advancement of sustainable energy generation.

드론 영상의 입체 텍스처 기법을 활용한 VR 기반 점검이력 관리시스템 개발에 관한 연구 : 풍력터빈을 중심으로 한 점검이력 관리시스템 개발에 관한 연구

한인수 경상국립대학교 융합과학기술대학원 2021 국내석사

This paper is to study the technology of inspection and history management systems for wind power that are continuously increasing around the world. In the past, inspections and analysis of major devices in renewable energy system have been operated in an analog way that identifies problems through photography and passive method. To improve this problem, we conduct a study on VR-based inspection history management system using 3D texturing technique of drone image. The paper describes the current status and prospects of wind power, research and development of wind power blade inspection and history management systems, experiments and reviews in the field, and expected effects and future utilization of this technology. In the future, it is expected that the latest technology for inspection and management of renewable system will be secured and introduced to the site through the development research of this system to reduce maintenance costs and power generation costs.

전력최적화기를 이용한 태양광발전 시스템 실증 연구

전태연 경상국립대학교 융합과학기술대학원 2023 국내석사

This study focuses on investigating equipment failures in photovoltaic systems and conducting a practical study on photovoltaic generation by developing a panel level Distributed Maximum Power Point Tracking(DMPPT) system. As solar energy gains popularity as a renewable energy source, it is important to ensure that the photovoltaic systems are maintained and operated effectively. The study explores the common problems associated with photovoltaic systems and the importance of developing new system in preventing and addressing these issues. The study uses a qualitative approach, drawing on literature review and new technology development. The results indicate that common issues with solar power systems include wiring faults, module damage, and inverter failures. To prevent these issues, regular maintenance is essential. System performance monitoring is essential for maintenance activities. The developed system enables remote monitoring of individual panels, allowing for more precise and efficient operation compared to traditional string level monitoring. The findings of this study can be useful to facility mangers, PV system owners.

신재생 사업개발 및 화력발전사업 운영에 있어서의 효율적 갈등관리 방안에 관한 연구 : 신재생 사업개발 및 화력발전사업 운영을 중심으로

왕호동 경상국립대학교 융합과학기술대학원 2023 국내석사

본 논문은 재생 에너지 개발과 열 발전 프로젝트 운영으로 인해 발생하는 갈등을 효과적으로 관리하기 위한 전략을 제안합니다. 갈등의 원인과 특성을 분석하고, 이러한 분야에서의 갈등 예방 및 해결 방안을 소개합니다. 연구 결과는 이해관계자 간의 이해 부족, 정보 비대칭, 지원 갈등 및 이익 분배의 부적절성 등과 같은 다양한 요인에서 비롯된 갈등을 보여줍니다. 이러한 갈등을 해결하기 위해 정책 및 기구적 조치, 정보 공개, 대화 등과 같은 다양한 갈등 관리 방법이 필요함을 확인하였습니다. 이러한 결과를 바탕으로 본 논문은 중재, 협상, 지속적인 의사소통 및 모니터링 등을 포함한 공공 갈등 예방 및 해결을 위한 방안을 제시합니다. 이러한 조치들은 재생 에너지 개발과 열 발전 프로젝트와 관련된 갈등을 예방하고 통제하는 데 매우 유용한 지침이 될 것으로 기대됩니다. 따라서, 이 논문은 재생 에너지 개발 및 열 발전 프로젝트와 관련된 이해관계자 간의 갈등을 이해하고 관리하기 위한 포괄적인 자료로 활용될 것입니다. The purpose of this paper is to propose ways to effectively manage conflicts related to the development of renewable energy and the operation of thermal power generation projects. To do so, the causes and characteristics of conflicts are analyzed and solutions for conflict prevention and resolution in these fields are introduced. The research results show that conflicts arising from the development of renewable energy and the operation of thermal power generation projects are caused by various factors, including lack of understanding between stakeholders, information asymmetry, support conflicts, and distribution of benefits. It was confirmed that various conflict management methods, such as policy and institutional measures, information disclosure, and dialogue, are needed to solve these conflicts. Based on these results, this paper suggests measures for preventing and resolving public conflicts, such as mediation and negotiation, continuous communication and monitoring, etc. It is expected that these measures will be very useful guidelines for preventing and controlling conflicts related to the development of renewable energy and the operation of thermal power generation projects. Therefore, this paper will be a very useful resource for understanding and managing conflicts among stakeholders related to the development of renewable energy and the operation of thermal power generation projects.

소수력 발전소를 건립하기 위한 경제성 검토 : 삼천포화력본부 인근

이동옥 경상국립대학교 융합과학기술대학원 2023 국내석사

This study focuses on conducting an economic feasibility assessment for the construction of an additional small hydroelectric power plant, aiming to promote environmentally friendly and sustainable energy production. Specifically, the study aims to evaluate the economic viability of harnessing the energy being discharged from the Goseong Green Power Plant towards the Samcheonpo Thermal Power Headquarters, for the purpose of constructing an additional small hydroelectric power plant. the findings of this assessment can serve as a basis to support effective planning and implementation of future small hydroelectric power plants.