에너지 자립 섬을 위한 문화자원 활용고찰

황미용,이승권 한국도서(섬)학회 2022 韓國島嶼硏究 Vol.34 No.2

Energy independent islands (energy independent villages) refers to an island (village) that increases energy independence by producing the necessary energy by itself. The energy independent village project was led by the government. However, many of those businesses have mostly failed. Nevertheless, as energy conversion was emphasized in response to the climate crisis and the importance of carbon neutrality, the necessity and social demand for the energy independent islands (energy independent villages) project were further strengthened. Focusing on the United Nations Environmental Development Conference, energy independence villages were expanded to include environmental resources, social resources, economic and industrial aspects for a sustainable global environment. In this context, from the perspective of cultural resources covering all areas of our lives, it is hoped to study sustainable energy independent islands according to the types of cultural resources. To this end, first, research trends on energy independence villages are examined, and major energy policies and cases at home and abroad are analyzed. From the perspective of cultural resources, the sustainable measures of energy independence islands according to the types of natural resources, cultural resources, and social resources are as follows. First, renewable energy should be produced after reviewing suitable facilities and sites that reflect the characteristics of the island area when utilizing natural resources. After that, it will expand to green energy tourism and job creation by linking the island's landscape and ecological resources. Second, it is the use of cultural resources. Education, in particular, plays a very important role. Through education, we should recognize the need for energy conversion, strengthen the spontaneity of residents, and cultivate the power to grow naturally as a resident-participating energy independent island. This makes it a cyclical structure that gains both resident acceptance and facilitates sustainable energy independent villages. Third, it is the use of social resources. Now, it is necessary to establish an institutional foundation for creating and operating energy independence islands as a decentralized grid. To this end, policies, institutions, and administration, which are institutional cultural resources, should be supported. Human resources are very important key resources for energy independence, but the government and local governments remain passive. Economic resources (including project costs and subsidies) are also important, but more importantly, the efficient operation of project costs and the sustainable operation structure (the financial aspect) after the completion of the project. It should be accepted as a process that needs to go through conflict, and conflict or conflict should be resolved flexibly by utilizing governance cultural resources. In addition, the introduction of a "profit sharing system" that shares profits with residents is considered a good alternative. In the future, the energy independent island project should not be approached based on visible performance. The government-led one-sided top-down support project should also be avoided. Beyond simple renewable energy production, it should be promoted as a strategy for cultural and regional development. 에너지 자립 섬(에너지 자립 마을)은 필요한 에너지를 스스로 생산하여 에너지 자립도를 높이는 섬(마을)을 의미한다. 에너지 자립 마을 사업은 정부 주도로 진행되었다. 하지만 그 많은 사업들은 대부분 실패했다. 그럼에도 불구하고 기후 위기 대응와 탄소 중립의 중요성에 따라 에너지 전환이 강조되면서 에너지 자립 섬(에너지 자립 마을) 사업의 필요성과 사회적 요구는 더 강화되었다. 유엔환경개발 회의를 중심으로 지속 가능한 지구 환경을 위해 에너지 자립 마을을 환경 자원과 사회적 자원, 경제 및 산업적 측면까지 확대하여 논의하였다. 이런 맥락에서 우리 삶의 전 영역을 아우르는 문화자원 관점에서 문화자원의 유형에 따라 지속 가능한 에너지 자립 섬을 연구하고자 한다. 이를 위해 먼저 에너지 자립 마을에 관한 연구 동향을 살피고, 국·내외 에너지 주요 정책과 사례를 분석한다. 문화자원 관점에서 자연적 자원, 문화적 자원, 사회적 자원 등의 유형에 따라 에너지 자립 섬의 지속 가능한 방안을 살피면 다음과 같다. 첫째, 자연적 자원 활용 시 섬 지역 특성이 반영된 적합한 시설 및 부지 검토 후 재생 가능한 에너지를 생산해야 한다. 이후 섬의 경관과 생태 자원까지 연계한 녹색 에너지 관광과 고용 창출로 확대시킨다. 둘째, 문화적 자원 활용이다. 특히 교육은 매우 중요한 역할을 한다. 교육을 통해 에너지 전환의 필요성을 자각하고, 주민들의 자발성을 강화하고, 주민 참여형 에너지 자립 섬으로 자생하는 힘을 기르도록 한다. 이는 주민 수용성과 지속 가능한 에너지 자립 마을이 되는 선순환 구조를 만들게 한다. 셋째, 사회적 자원 활용이다. 이제 에너지 자립 섬을 분산형 그리드로 조성하고, 운영하는 제도적 기반을 마련해야 한다. 이를 위해 제도문화 자원인 정책과 제도, 행정 등이 뒷받침 되어야 한다. 인적 자원은 에너지 자립에 있어 아주 중요한 핵심 자원이지만 정부와 지자체는 여전히 소극적인 태도를 보인다. 경제적 자원(사업비, 보조금 포함)도 중요 하지만 그 보다 더 중요한 것이 사업비의 효율적인 운영과 사업 종료 후 지속 가능한 운영 구조(금적적 측면)이다. 추진 과정에서 갈등을 거쳐야 할 과정으로 받아드리고, 거버넌스 문화자원을 활용하여 대립적이거나 상충 되는 갈등들을 융통성 있게 풀어야 한다. 더불어 주민들과 이익을 함께 나누는 ‘이익 공유제’ 도입이 좋은 대안이 될 수 있다. 향후 에너지 자립 섬 사업을 가시적 성과 위주로 접근해서는 안된다. 정부 주도의 일방적인 하향식 지원 사업도 지양해야 한다. 단순 재생 에너지 생산을 넘어 문화와 지역 발전의 전략으로 추진해야 할 것이다.

태양 입사각에 따른 전력 변화

황미용,응우옌반흥,이순형,최용성 한국전기전자재료학회 2023 전기전자재료학회논문지 Vol.36 No.3

In this paper, we analyzed the transformation of the power following by the angle of incidence of the solar, the angle of photovoltaic module and artificial solar changed from 30° to 90° and synchronously changed the distance from 0.1 m to 0.5 m. Setting the distance between the artificial solar and the luminometer from 0.1 m to 0.5 m and set the angles to 90°, 60°, 45°, and 30°, the angle was 90° and when the distance was 0.1 m, the maximum Illuminance was 19,580 lux, the light could be obtained more. If the angle of incidence between the Artificial solar and the photovoltaic module was 90° and the variable resistance was 1,000 Ω at a distance of 0.4 m, the maximum power reached 0.82 W. Provided that the angle of incidence between the artificial solar and the photovoltaic module was 90° and the distance was 0.2 m since the variable resistance had the maximum power of 500 Ω, the maximum power was 0.78 W. At 1,000 Ω, the maximum power is 0.80 W so the maximum power at the variable resistance 1,000 Ω could obtain higher power than the variable resistance 500 Ω. The variable resistance was 1,000 Ω and the angle of incidence between the Artificial solar and the photovoltaic module was 90° at a distance of 0.4 m, and the maximum power reached 0.82 W. The angle was 60° at 0.3 m and 0.4 m the maximum power reached 0.10 W. The angle was 45° at 0.2 m maximum power reached 0.020 W, the angle was 30° at 0.4 m, and the maximum power reached 0.004 W. In four results about maximum power depending on the angle of incidence between the artificial solar and the photovoltaic module, the luminous efficiency and maximum power can be got the best at an angle of 90°.

부하 형태에 따른 전력패턴 분석

황미용 ( Mi-yong Hwang ),조승준 ( Seung-joon Cho ),이순형 ( Soon-hyung Lee ),최용성 ( Yong-sung Choi ) 한국전기전자재료학회 2023 전기전자재료학회논문지 Vol.36 No.4

In this paper, we compared and analyzed the power load patterns of dormitory buildings and office buildings to use them as basic data (demand analysis and capacity design) for the design and operation of microgrids for multi-use facilities, and the following conclusions were got. During the daytime on regular weekdays, the power consumption load pattern of office buildings was relatively large at 264.0~332.3 kWh, and during the evening hours, the power consumption load pattern of dormitory buildings was relatively large at 233.0~258.3 kWh. In the case of vacation, during the daytime on weekdays, the power consumption load pattern of office buildings was relatively large at 279.1~407.4 kWh, and in the evening, the power consumption load pattern of dormitory buildings was relatively high at 280.1~394.1 kWh. During the daytime on regular weekends, the power consumption of dormitory-type buildings was relatively high at 133.5~201.6 kWh, and it was found that the power consumption of dormitory-type buildings appeared relatively high at 187.5~252.1 kWh. During a vacation in the daytime on weekends, the power consumption of dormitory-type buildings was found to be 186.5 kWh~ and 218.6 kWh. The increase in power consumption during a vacation (December-February) compared to normal (April-June) was thought to be due to an increase in electricity demand, and the reason for the higher power consumption in dormitory buildings during the vacation was due to reduced working hours in office buildings.

태양광 발전 시스템의 발전량 및 이용률 변화

황미용 ( Mi-yong Hwang ),이순형 ( Soon-hyung Lee ),최용성 ( Yong-sung Choi ) 한국전기전자재료학회 2023 전기전자재료학회논문지 Vol.36 No.4

In this paper, in order to investigate the efficiency of solar power generation system operation, we have studied operation cases such as generation amount, utilization rate, and generation time, and the following conclusions were obtained. The amount of power generation in 2017 was 1,311.48 MWh, and the amount of power generation in 2018 was 1,226.03 MWh. In 2021, 1,184.28 MWh was generated, and 90.30% compared to 2017, and the amount of power generation decreased by 1.94% every year. The deterioration of photovoltaic modules could be seen as one cause of the decrease in power generation. 1,977.74 MWh was generated in the spring, and 1,621.77 MWh was generated in the summer. In addition, 1,478.87 MWh was generated in the fall, and 1,110.55 MWh was generated in the winter, showing a lot of power generation in the order of spring, summer, fall, and winter. From 2017 to 2022, the seasonal utilization rate, daily power generation time, and daily power generation were investigated, and it could be seen that the spring utilization rate varies from 19.29% to 16.99%. It could be seen that the daily generation time in winter decreased from 2.67 hours to 2.13 hours, and in spring it generated longer than spring from 4.63 hours to 4.08 hours. In addition, the daily power generation in winter also decreased from 2.67 MWh to 2.13 MWh, and in spring it decreased from 4.63 MWh to 4.08 MWh, but it could be seen that it is more than in winter.

불평등 전계에서 변압기 절연유 절연파괴 연구

조하영,이순형,황미용,최용성 한국전기전자재료학회 2023 전기전자재료학회논문지 Vol.36 No.3

A breakdown voltage and breakdown electric field of the transformer insulating oil of liquid dielectric were studied in uniform electric field and non-uniform electric field and the transformer insulating oil was observed by the process reached breakdown. Insulation performance evaluation of the liquid dielectric was evaluated at the electrode spacing of 2.5 mm under the conditions of domestic and international standards (KS C IEC 60156), so a comparative review was conducted at the electrode spacing of 2.5 mm. When the electrode spacing is 2.5 mm, the average breakdown voltage is 38.5 kV for sphere-sphere electrodes, 26.6 kV for plate-plate electrodes, 22.9 kV for needle-needle electrodes, and 24.3 kV for sphere-needle electrodes. 23.7 kV for the sphere-plate electrode, and 20.7 kV for the needle-plate electrode. From these results, it can be seen that the average value of the breakdown voltage at the electrode spacing of 2.5 mm, in ascending order, is sphere-sphere, plate-plate, sphere-needle, sphere-plate, needle-needle and needle-plate. It was found that the breakdown voltage of the unequal field was lower than that of the equal field.

전극 형태와 전극 간 거리에 따른 전기적 특성 분석

김태희 ( Tae-hee Kim ),이순형 ( Soon-hyung Lee ),황미용 ( Mi-yong Hwang ),최용성 ( Yong-sung Choi ) 한국전기전자재료학회 2023 전기전자재료학회논문지 Vol.36 No.4

In this paper, in order to analyze high electrical insulation and cooling performance using mineral oil, the liquid insulating oil was changed in electrode shape and distance between electrodes to compare and analyze electrical characteristics according to equal electric field, quasi-equivalent electric field, and unequal electric field. As a result, the breakdown voltages were 36,875 V and 36,875 V in the form of sphere-sphere and plate-plate electrodes with equal electric fields. The breakdown voltage was 31,475 V in the sphere-plate electrode type, which is a quasi-equilibrium field, and the breakdown voltage was 28,592 V, 27,050 V, and 22,750 V in the needle-needle, sphere-needle, and needle-plate electrode types, which are unequal fields. Through this, it is possible to know the difference in breakdown voltage according to the type of electric field. The more equal the field, the higher the breakdown voltage, and the more unequal field, the lower the breakdown voltage. The difference in insulation breakdown voltage could be seen depending on the type of electric field, the insulation breakdown voltage was higher for the more equal electric field, and the insulation breakdown voltage was lower for the more unequal electric field. Also, it was confirmed that the closer the distance between the electrodes, the higher the insulation breakdown voltage, the higher the insulation breakdown current, and the insulation breakdown voltage and the insulation breakdown current were proportional.