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- 저자 : In-Keun Yu(유인근) (검색결과 233 건)
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Hardware-Based Implementation of a PIDR Controller for Single-Phase Power Factor Correction
Le Dinh Vuong(레딘브엉),Sang-Min Park(박상민),In-Keun Yu(유인근),Minwon Park(박민원) 한국산업정보학회 2016 한국산업정보학회논문지 Vol.21 No.4
In a single-phase power factor correction (PFC), the standard cascaded control algorithm using a proportional-integral-derivative (PID) controller has two main drawbacks: an inability to track sinusoidal current reference and low harmonic compensation capability. These drawbacks cause poor power factor and high harmonics in grid current. To improve these drawbacks, this paper uses a proportional-integral-derivative-resonant (PIDR) controller which combines a type-III PID with proportional-resonant (PR) controllers in the PFC. Based on a small signal model of the PFC, the type-III PID controller was implemented taking into account the bandwidth and phase margin of the PFC system. To adopt the PR controllers, the spectrum of inductor current of the PFC was analyzed in frequency domain. The hybrid PIDR controller were simulated using PSCAD/EMTDC and implemented on a 3kW PFC prototype hardware. The performance results of the hybrid PIDR controller were compared with those of an individual type-III PID controller. Both controllers were implemented successfully in the single-phase PFC. The total harmonic distortion of the proposed controller were much better than those of the individual type-III PID controller.
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공학교육인증을 위한 학사지원시스템의 개발과 적용 : ${\copyright}SAVIORS$
유인근,Yu In-Keun 한국공학교육학회 2005 공학교육연구 Vol.8 No.3
Changwon National University has been developing and using a computerized supporting system named SAVIORS for ABEEK(Accreditation Board for Engineering Education of Korea) related tasks since the year of 2001. The main purpose of the development of SAVIORS is to totally computerize all tasks related to ABTEK so that faculty staff may perform their job as readily and efficiently as possible. In this paper, detailed functions and utilization records of the SAVIORS are introduced for sharing the advantages of the system with other institutes.
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Industrial load forecasting using the fuzzy clustering and wavelet transform analysis
유인근,Yu, In-Keun Institute of Korean Electrical and Electronics Eng 2000 전기전자학회논문지 Vol.4 No.2
This paper presents fuzzy clustering and wavelet transform analysis based technique for the industrial hourly load forecasting fur the purpose of peak demand control. Firstly, one year of historical load data were sorted and clustered into several groups using fuzzy clustering and then wavelet transform is adopted using the Biorthogonal mother wavelet in order to forecast the peak load of one hour ahead. The 5-level decomposition of the daily industrial load curve is implemented to consider the weather sensitive component of loads effectively. The wavelet coefficients associated with certain frequency and time localization is adjusted using the conventional multiple regression method and the components are reconstructed to predict the final loads through a five-scale synthesis technique. The outcome of the study clearly indicates that the proposed composite model of fuzzy clustering and wavelet transform approach can be used as an attractive and effective means for the industrial hourly peak load forecasting.
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보의 크기와 전단철근간격비에 따른 고강도 철근콘크리트보의 전단강도 특성 연구
유인근(Yu, In-Geun),박나정(Park, Na-Jeong),백승민(Baek, Seung-Min),김우석(Kim, Woo-Suk),곽윤근(Kwak, Yoon-Keun) 대한건축학회 2021 대한건축학회논문집 Vol.37 No.9
This study conducted an experiment on the shear strength of high-strength reinforced concrete beams depending on the effects of shear reinforcement spacing and beam size. Through experiments, experimental values were compared with the theoretical values based on standard equations such as KDS 14 20 22, ACI 318-19, CEB-FIP, and existing proposal equations which are Zsutty, Bazant, and Lee’s equations. It will be compared and analyzed to be used as basic data for shear design of reinforced concrete beams with fck = 50 ㎫, ρ = 0.025 and the width-to-depth ratio (h/b) were constant, and the beam size (b×d) and shear reinforcement spacing (d/s) were variables. The test specimens were divided into three series, SHR1, SHR2, and SHR3, according to the size of the cross section. As a result of comparing the experimental value and the theoretical value according to the standard equations and the proposed equations, the average value was 1.15 to 1.61 and the standard deviation was 0.16 to 0.20. Among the comparisons between the standard and proposed equations, the Zsutty, Bazant, and Lee’s equations predict experimental values relatively well. The mean of the Zsutty’s equation was 1.29, the standard deviation was 0.18, the mean of the Bazant’s equation was 1.15, the standard deviation was 0.19, the mean of the Lee’s equation was 1.17, and the standard deviation was 0.20, respectively.
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이동한(Dong-han Lee),이석주(Sukju Lee),김종현(Jonghyun Kim),박민원(Min-won Park),유인근(In-Keun Yu) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.4
In this paper an integrated model of PV-AF (Photovoltaic-Active Filter) and PV-SPE (Photovoltaic Solid Polymer Electrolyte) system using PSCAD/EMTDC were explained in detail. The main concept of PV-AF system starts from the "harmonics". In order to deliver power to utility, PV system essentially needs a converter system. Here PV-AF system adds the function of active filter to the converter system installed in PV system, which was introduced already in several papers. PV-SPE system has been studied as a replacement of existing hydrogen production technology that emits large amount of carbon dioxide into atmosphere. Until now, these two systems, PV-AF and PV-SPE, have been considered separately. However, in this paper, characteristics and advantages of combined system are discussed in detail.
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Design and manufacture of HTS current lead for 10kJ SMES
박해용(Hae-Yong Park),김광민(Kwang-Min Kim),김대원(Dae-Won Kim),김아롱(A-Rong Kim),박민원(Minwon Park),유인근(In-Keun Yu),김석호(Seok-Ho Kim),심기덕(Kideok-Sim),손명환(Myung-Hwan Sohn) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.7
In superconducting magnetic energy storage (SMES) systems, the current leads are usually divided into two parts. Normal metals like brass or copper are often used in the first part from the room temperature to the 1st stage of the cryocooler. Their dimensions were decided to minimize the conduction heat penetration and Ohm's heat generation. The second part down to the cryogenic coil is made of high temperature superconductor (HTS). HTS current leads can reduce the conductive heat penetration because they have poor thermal conductivity and generate no Ohm's heat generation. The brass current lead and the HTS current lead were designed and fabricated for application to the 10kJ class SMES system. The HTS current lead is 300A class. The HTS current lead was stacked with 2 HTS layers using the Bi2Sr2Ca2Cu3Ox (BSCCO) /Ag. In this paper, we introduce the design procedure of the current leads and discuss the test results of the current leads.
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PSCAD/EMTDC를 이용한 PV-AF-SPE 시스템의 특성분석
이동한(Donghan Lee),이석주(Sukju Lee),김종현(Jonghyun Kim),박민원(Minwon Park),유인근(In-Keun Yu) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7
In this paper an integrated model of PV-AF (Photovoltaic-Active Filter) and PV-SPE (Photovoltaic Solid Polymer Electrolyte) system using PSCAD/EMTDC were explained in detail. The main concept of PV-AF system starts from the "harmonics". In order to deliver power to utility, PV system essentially needs a converter system. Here PV - AF system adds the function of active filter to the converter system installed in PV system, which was introduced already in several papers. PV-SPE system has been studied as a replacement of existing hydrogen production technology that emits large amount of carbon dioxide into atmosphere. Until now, these two systems, PV-AF and PV-SPE, have been considered separately. However, in this paper, characteristics and advantages of combined system are discussed in detail.
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