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배전선로의 분산전원 연계용량 기준 상향을 위한 분석 연구
임현옥(Hyeonok Lim),김현진(Hyeonjin Kim),심준보(Junbo Sim),조성수(Seongsoo Cho) 대한전기학회 2020 전기학회논문지 Vol.69 No.3
With Korean Government’s Renewable energy 3020 plan, the penetration of DERs in Korean grid will raise to 20 percent of the total generation rate by 2030. Especially, with Interconnection guarantee policy for small generators by Korea’s power corporation, KEPCO, established in Oct, 2016, DERs interconnection delay due to lack of allowable distribution hosting capacity occurred and reduction of expanding cost for distribution facilities where 70% of DERs in South Korea are installed became one of important issues of KEPCO. Therefore, KEPCO needs to extract reasonable measures to increase feasible hosting capacity of distribution feeders in order to reduce expanding facilities cost under the condition of no matter in distribution system operation. This paper proposes feasible hosting capacity of distribution feeders that can be adopted and the status of DER installation in distribution system, PV generation data, minimum load data in distribution feeders.
전력계통 주파수응답 기여도 기반의 전기저장장치 주파수추종서비스 유효용량 산정
임현옥(Hyeon Ok Lim),최우영(Woo Yeong Choi),권한나(Han Na Gwon),국경수(Kyung Soo Kook) 대한전기학회 2017 전기학회논문지 Vol.66 No.11
This paper calculates the effective capacity of EES providing the primary frequency control service based on its contribution to the frequency response of the power system. The amount of governor response from conventional generators which can be replaced by the primary frequency control from EES keeping the frequency response of the power system is defined as the effective capacity. The proposed method for calculating the effective capacity of EES is verified through case studies employing Korean power system. Furthermore, the application of the effective capacity of EES to power system operation is also discussed.
SLE 환자에서의 Listeria Monocytogenes에 의한 뇌막염 2예
임현옥,최진학,이종석,김건호,함종렬,심상군,신원호,우성경 대한감염학회 1991 감염 Vol.23 No.3
Listeria meningitis can occur in the late neonatal setting(after 3 days of age) or in the immunosuppressed adult. Factors in common among the immunosuppressed patients include underlying diseases or therapy that primarily affects the thymus-derived lymphocytes or mononuclear phagocyte system. We experienced two cases of Listeria meningitis in patients with SLE who had been receiving steroid therapy for their primary disease. The organism, Listeria monocytogenes, found in blood and cerebrospinal fluid (CSF).
연구논문(硏究論文) : 국내 수목원 전문인력 교육과정의 분석과 활용에 관한 연구
임현옥 ( Hyeon Ok Lim ),성현찬 ( Hyun Chan Sung ),황의식 ( Eui Shik Hwang ) 한국환경복원기술학회 2015 한국환경복원기술학회지 Vol.18 No.1
In connection with biodiversity that has recently become the topic, competition to secure biological genetic resources is being heightened all over the world. Korea also has a variety of efforts to secure and preserve plant genetic resources, and has recognized the importance of the function and role of arboretums. Arboretums in Korea, however, have the problems in terms of quality due to the rapid increase. One of the problems is shortages in experts who are essential for the proper functioning of arboretums. To solve the problem, the State introduced Gardener Training Program certification system and started to train gardeners. However, gardeners who have actually employed at arboretums are less than 20% and thus the problem of shortages in experts still exists. In this context, this study examined 44 registered arboretums in Korea to find out the current situation of experts; analyzed arboretum experts and the program certification system in view of relevant laws; and investigated the current situation of training programs being operated in three Gardener Training Program certification organizations. Finally, this study conducted a survey of 68 gardeners who completed the training program at Chollipo Arboretum and tried to suggest a plan for securing experts from the gardener training programs. The plan for utilizing the trained gardeners as experts in arboretums is as follows: First, legal standards for the employment of experts in arboretums should be strengthened. Second, it is necessary to evaluate training programs, in order to raise the reliability of arboretum experts` expertise. Third, official validity that can be honored in all arboretums should be granted to a certificate of program completion. Finally, networks of gardeners who completed the programs should be formed through follow-up management of them.