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金鉉烘(Hyun-Houng Kim),金眞鎬(Jin-Ho Kim),金亨中(Hyeong-Jung Kim),朴宗培(Jong-Bae Park),愼重麟(Joong-Rin Shin) 대한전기학회 2008 전기학회논문지 Vol.57 No.1
This paper presents a new approach of a evaluation of location marginal prices(LMPs) considering demand response resources in the competitive electricity market. The stabilization of the electric power supply and demand balance has been one of the major important activities in electric power industry. Recently, much attention is paid to the demand-side resources which are responsive to incentives or time-varying prices and existing power system planning and operation activities are incorporated with the so-called demand response resources. In this paper, we first present an analytical method for calculation of LMPs considering demand response resources and then break down the LMPs into three components. In this study, we assume that Korean power system consists of two major regions, one which is the metropolitan and the other is non-metropolitan region. In the case study, we have considered several LMPs cases with different use of locational demand response resource and we can obtain a locational signal to demand response resources. Also, the economics of demand response resources are evaluated, compared with the increase of transmission line capacity and of generation capacity.
金鉉烘(Hyun-Houng Kim),曺基善(Ki-Seon Cho),鄭允源(Yun-Won Jeong),朴宗培(Jong-Bae Park),愼重麟(Joong-Rin Shin) 대한전기학회 2007 전기학회논문지 Vol.56 No.8
This paper presents a graphical windows-based software for the education and training of transmission network charge. The motivation for the development of the simulator is to provide students with a simple and useable tool for gaining an intuitive feel for transmission network charge. The developed simulator consists of the main module (MMI,GUI), the power flow module (PF), the power flow tracing module (PFT), and usage cost DB module (UCD). Each module has a separate graphical and interactive interfacing window. The developed simulator provides with two power system analysis methods (i.e., DC-PF and Modified DC-PF) and supports the PSS/E input data format to load input data of power system. Also, power flow tracing can be calculate using four methods such as "Felix Wu", "Modified Felix Wu", "DCLF ICRP", and "Reverse MW mile". Results of calculation for transmission usage cost are displayed and compared on the window through the table and/or chart. Therefore, the developed simulator can be utilize as a useful tool for effective education and training of transmission network charge.
김현홍(Hyun-Hong Kim),송형용(Hyoung-Yong Song),김진호(Jin-Ho Kim),박종배(Jong-Bae Park),신중린(Jung-Rin Shin) 대한전기학회 2007 대한전기학회 학술대회 논문집 Vol.2007 No.11
This paper introduces the method of sequential clustering as a tool for the effective clustering of mass unit electrical systems. The interconnected network system retains information about the location of each line. With this information, this paper aims to carry out initial clustering through the transmission usage rate, compare the results of similarity measures for regional information with similarity measures for regional price, and introduce the technicalities of the clustering method. This transmission usage rate used power flow based on congestion costs and modified similarity measurements using the FCM algorithm. This paper also aims to prove the propriety of the proposed clustering method by comparing it with existing clustering methods that use the similarity measurement system. The proposed algorithmis demonstrated through the IEEE 39-bus RTS.
김현홍(H.H. Kim),추성호(S.H. Choo),채명석(M.S. Chae),박종배(J.B. Park),신중린(J.R. Shin) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.11
This paper presents a new one-terminal numerical algorithm for fault location estimation and for faults recognition. The proposed algorithm are derived for the case of most frequent single-phase line to ground fault in the time domain. The arc voltage wave shape is modeled numerically on the basis of a great number of arc voltage records obtained by transient recorder. From the calculated arc voltage amplitude it can make a decision whether the fault is permanent of transient. In this paper the algorithm uses a very short data window and enables fast fault detection and classification for real-time transmission line protection. To test the validity of the proposed algorithm the Electro-Magnetic Transient Program(EMTP/ATP) is used.
김현홍(H.H. Kim),송형용(H.Y. Song),이찬주(C.J. Lee),박종배(J.B. Park),신중린(J.R. Shin) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.11
This paper presents a graphical windows-based software for the education and training of the transmission network use of system charge. The developed simulator consist of the main module(MMI, GUI), the power flow module(PF), the power flow tracing module(PFT) and management of usage cost DB module(UCD). Each module has a separate graphical and interactive interfacing window. To have effective education for transmission network use of system charge, the developed simulator are provided with two power system analysis methods. Input data of power system can use the format of PSS/E input data. Also calculation of power flow tracing are provided with four methods such as "Felix Wu", "Modified Felix Wu", "DCLF ICRP" and "Reverse MW mile". Results of calculation for usage cost are shown on the window through the table or chart. Therefore user can confirm the detailed differences of results from each calculation method.
실패공포가 학업지연행동에 미치는 영향에 있어 학업성취도의 조절효과에 관한 연구: 환대산업 관련 전공을 하는 지방대학생들을 중심으로
김현홍 ( Kim Hyun-hong ),김진강 ( Kim Jin-kang ) 한국관광산업학회 2019 Tourism Research Vol.44 No.2
본 연구는 환대산업을 전공하는 지방대학생들을 대상으로 그들이 지각하는 실패공포가 학업지연행동에 미치는 영향과 이들 관계에서 학업성취도의 조절효과를 검증하였다. 실증분석 결과 다음과 같은 결과가 나타났다. 첫째, 실패공포가 학업지연행동에 미치는 영향관계를 검증한 결과 실패공포 중 중요한 타인의 관심을 상실하는 공포에 대한 지각수준이 높을수록 학업지연행동이 높아진다는 것으로 나타났다. 둘째, 실패공포가 학업지연행동에 미치는 영향에 있어 학업성취도의 조절효과를 분석한 결과 실패공포 중 중요한 타인의 관심을 상실하는 것에 대한 공포에 대해 높게 지각하더라도 학업성취도에 대해 높게 지각하면 학업지연행동이 낮아지는 것으로 나타났다. 결론적으로 실패공포에 따른 학업지연행동을 줄이기 위해서는 학업성취도를 높게 지각하도록 해야 할 것이다. 이에 대학 및 가정에서는 실패에 대한 두려움을 지각하지 않도록 칭찬과 격려를 통해 실패에 대한 공포를 없앨 수 있도록 도움을 주어야 할 것이며 학업성취도와 같은 성공경험과 지속적인 관심을 통해 학생들이 자신감을 가질 수 있도록 해야 할 것이다 This study was conducted on local college students majoring in the hospitality industry to confirm the moderating effect of academic achievement in the effects of perceived fear of failure on academic procrastination in their relationships. Empirical analysis results were as follows. First, verifications of the relationship in which fear of failure affects academic procrastination showed that, of fear of failure, when perception levels regarding a fear of losing the attention of important others rise, academic procrastination increases. Second, analysis of the moderating effects of academic achievement in the effects of fear of failure on academic procrastination showed that, of fear of failure, if perceptions of fear of upsetting important others are high and academic achievement, if receptivity is highly perceived, then academic procrastination decreases further. Conclusively, colleges and families should give support to remove the fear of failure through compliments and encouragement so that students don’t perceive their fear of failure and can be confident through small experiences of success and continued interest.
순차적 클러스터링기법을 이용한 송전 계통의 지역별 그룹핑
김현홍(Hyun-Houng Kim),이우남(Woo-Nam Lee),박종배(Jong-Bae Park),신중린(Joong-Rin Shin),김진호(Jin-Ho Kim) 대한전기학회 2009 전기학회논문지 Vol.58 No.5
This paper introduces a sequential clustering technique as a tool for an effective grouping of transmission systems. The interconnected network system retains information about the location of each line. With this information, this paper aims to carry out initial clustering through the transmission usage rate, compare the similarity measures of regional information with the similarity measures of location price, and introduce the techniques of the clustering method. This transmission usage rate uses power flow based on congestion costs and similarity measurements using the FCM (Fuzzy C-Mean) algorithm. This paper also aims to prove the propriety of the proposed clustering method by comparing it with existing clustering methods that use the similarity measurement system. The proposed algorithm is demonstrated through the IEEE 39-bus RTS and Korea power system.
김현홍(Hyun-Houng Kim),이우남(Nam-Woo Lee),김욱(Wook Kim),박종배(Jong-Bae Park),신중린(Joong-Rin Shin) 대한전기학회 2009 전기학회논문지 Vol.58 No.10
This paper presents a graphical windows-based program for the education and training for novel network reduction. The object of developed simulator is to provide users with a simple and useable tool for gaining an intuitive feel for power system analysis. The developed simulator consists of the main module (MMI,GUI), the location marginal price module (LMP), the clustering module and network reduction module. Each module has a separate graphical and interactive interfacing window. The developed simulator needs with the PSS/E input data format, generator cost function, location information. Line admittances of reduced network was determined by using the power flow method(Newton-Raphson). So line flow of reduced network is almost same to original power system. Results of reduced network are compared on the window in the tabular format. Therefore, the developed simulator can be utilized as a useful tool for effective education and training for power system analysis.