http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
배전계통연계 분산전원의 위상변화에 따른 고립운전 파라미터 특성
방지윤(Ji-Yoon Bang),김학만(Hak-man Kim),이복구(Bock-Ku Lee),심재선(Jae-sun Sim),신명철(Myong-Chul Shin) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7
Recently, much research has been done and many improvements have been developed for islanding protection of distributed generation (DG). Anti-islanding protection for DG must be act very quickly to prevent equipment damage at the time of disconnection and for the safety of maintenance and repair personnel. DG-based detection methods have included both passive and active types, and now research has shifted towards new anti-islanding detection methods that make up for the defects of the previous types. Because differences occur between the utility grid and the DG when connecting and disconnecting depending on thephase difference, voltage, current, relative capacity of electric power, and system operation characteristics, voltage phase angle is an important consideration. In this paper, we simulated islanded operation characteristics comparing phase difference of DG and the connected utility grid, andanalyzed various parameters (real power, reactive power, RMS voltage, RMS current, power factor angle, and frequency) by varying the DG's voltage phase angle. Using this information, we propose a suitable DG voltage phase angle for enhanced passive islanding detection techniques. Abstract - Recently, much research has been done and many improvements have been developed for islanding protection of distributed generation (DG). Anti-islanding protection for DG must be act very quickly to prevent equipment damage at the time of disconnection and for the safety of maintenance and repair personnel. DG-based detection methods have included both passive and active types, and now research has shifted towards new anti-islanding detection methods that make up for the defects of the previous types. Because differences occur between the utility grid and the DG when connecting and disconnecting depending on thephase difference, voltage, current, relative capacity of electric power, and system operation characteristics, voltage phase angle is an important consideration. In this paper, we simulated islanded operation characteristics comparing phase difference of DG and the connected utility grid, andanalyzed various parameters (real power, reactive power, RMS voltage, RMS current, power factor angle, and frequency) by varying the DG's voltage phase angle. Using this information, we propose a suitable DG voltage phase angle for enhanced passive islanding detection techniques.
액션플랜 기법을 활용한 초기 성인 건강증진 프로그램의 효과
김수현(Kim, Su Hyun),김민지(Kim, Min Ji),김상희(Kim, Sang Hee),김소연(Kim, So Yeon),박채연(Park, Chae Yeon),방지윤(Bang, Jee Yun) 한국간호과학회 2019 Journal of Korean Academy of Nursing Vol.49 No.4
Purpose: The purpose of this study was to evaluate the effectiveness of a health promotion program utilizing action planning strategy for young adults. Methods: A non-equivalent control group pre-post-test design was used. One hundred three university students participated in the study. Participants in the experimental group (n=51) were provided the health promotion program utilizing action planning strategy for five weeks. The program consisted of weekly sessions that included action planning and group feedback. The control group (n=52) was provided with health information every week for 5 weeks. Program outcomes, including self-efficacy, physical activity health behaviors, total exercise time per week, daily cigarette consumption, frequency of alcohol drinking per month, nutritional health behaviors, and subjective health status, were assessed at baseline and at follow-up after 5 weeks. Results: The participants in the experimental group demonstrated significant increases in self-efficacy, physical activity health behaviors, weekly exercise time, and nutritional health behaviors and significant decreases in daily cigarette consumption than those in the control group. Conclusion: The health promotion program utilizing action planning strategy is a brief and effective intervention to promote health behaviors among young adults. Further investigation is warranted to assess the program’s effectiveness among other age groups and populations at high risk for chronic illness.