학술논문에서의 한국어 문법용어 영어 대역어 사용 양상

정영국 ( Young Kuk Jeong ) 대한언어학회 2012 언어학 Vol.20 No.1

This paper aims to do a quantitative survey of the use of English equivalents of grammatical terms of the Korean language in research papers published since 2000. For this study 226 papers dealing with the Korean language or Korean as a Foreign Language (KFL) were selected from the database of KISS (Korean Information Sharing Service) to glean English equivalents of Korean grammatical terms. These equivalents were compared with their counterparts found in 9 KFL textbooks published in Korea or abroad for the comparison of the terms. The analysis of this paper especially focuses on the terms ``ida``, ``pre-noun``, ``particle``, and ``suffix``. This study intends to find out the most frequently used English equivalents of these grammatical terms in research papers to compare them with the terms used in Korean textbooks to find out frequently used grammatical terms from both resources. This study suggests that the standard English equivalents of Korean grammatical terms need to be selected from a comprehensive survey of current research findings, including research papers and textbooks.

능동전력필터의 간단한 평균전력이론과 수정된 보상성능 평가법

정영국,임영철,양승학 한국조명전기설비학회 1999 조명·전기설비학회논문지 Vol.13 No.3

종랭의 시간영역에서의 가상전력이론은 기본파 무효전력성분의 계산시, 전압과 전류의 상호상관함수 알고리즘이 이용되며, 이는 많은 시간과 기억용량이 필요하게 되므로 DSP(Digral Signal Process)에 의해서만 비로소 실시간 전력분석 및 제어가 가능하게 된다.또한 3차원 전퓨 좌표계에 의한 종래의 능동전력필터의 보상성능 평가법은 평가대상의 부하전류가 유도성인지 용량성 인지 평가할 수 없는 단점이 있었다. 따라서 본 연구에서는 종래의 시간영역에서의 가상전력이론에 비하여 비교적 전력을 간단히 분석할 수 있는 평균전력이론을 제안하고, 유도성 부하 및 용량성 부하에도 모두 적용 가능한 능동전력필터의 수정된 보상성능 평가법을 제시하였다. 종래의 시간영역에서의 가상전력이론과 비교하여 제안된 방법이 동일한 결과를 얻으면서 DSP등이 필요치 않는 간단한 알고리즘을 C-언어에 의한 시뮬레이터로 그 가능성을 확인하였다. The fictitious power theory in time domain is very easy to understand, but power analyzing speed of active power is increased, because power is analyzed using signal tedmiques based on the corre1ation between voltage and current wavefonns. Also, conventional methods in time/frequency domain to evaluate the correlation performance of active power filters are not provided easy solutions. So, the authors have previously proposed 3-D current coordinates which is composed into active component, fundarrental reactive component and distorted component of nonlinear loads current. This trethod has excellent perfonnance, but can not evaluate the characteristics of nonlinear load current whether It is inductive or capacitive. Therefore, To overcorre problems trentioned previously, this paper deals with the simple average power theory and the modified 3-D current coordinates for evaluating the compensation perfonnance of active power filters. To confirm the validity, active power filter simulator is developed using C-language. From the simulation, results are discussed their utility.tility.

정치개혁 : 지역갈등구조와 정당개혁

정영국 연세대학교 사회과학연구소 1999 社會科學論集 Vol.30 No.-

비선형 부하의 전류 동기 검출 기법

정영국,김영철 대불대학교 2001 論文集 Vol.7 No.1

Active current components in each phase of nonlinear load in serious unbalanced power condition, are symmetrically and equally detected by current synchronous detection(CSD) theory. But, in case of case of distorted conditions in power system, the CSD theory is not suitable any more, since the information of current components can be easily corrupted by the distorted utility voltage such as harmonics in waveform. Therefore, a new algorithm, the CSD theory by detecting positive sequence detection(PSD) of utility, is proposed in this paper. The proposed CSD theory is experimented and tested under distorted as well as asymmetrical condition in power system.

연료전지 전원을 갖는 3상 Z-소스 동적 전압 보상기

정영국(Young-Gook Jung) 한국조명·전기설비학회 2008 조명·전기설비학회논문지 Vol.22 No.10

본 연구에서는 전압품질에 민감한 설비를 위한 3상 Z-소스 동적 전압 보상기(Z-DVR : Z-Source Dynamic Voltage Restorer)를 제시하였다. 제안된 시스템은 수동필터와 Z-소스 토폴로지의 직렬형 능동필터로 구성된다. Z-DVR의 ESS(Energy Storage System)로는 친환경적인 고분자 전해질 연료전지(PEMFC : Proton Exchange Membrane Fuel Cells)를 사용하였다. 고조파 검출은 동기좌표계의 i<SUB>d</SUB>-i<SUB>q</SUB>이론에 의하였으며, 부하전압 보상을 위하여 PI제어를 사용하였다. 3상 전원이 모두 전압 sag가 발생하는 경우, PSIM에 의하여 제안된 방법과 배터리 스택을 적용하는 종전의 방법에 대하여 시뮬레이션을 수행하였으며, 전압 보상성능이 유사함을 알 수 있었다. 또한 전압 sag와 swell이 동시에 또는 독립적으로 발생하는 다양한 전원 조건하에서 제안된 시스템의 전압 보상 성능과 전압에 대한 %THD(%Total Harmonic Distortion)를 검토하였다. This paper proposes a three-phase Z-source dynamic voltage restorer (Z-DVR) to mitigate the voltage sag for the critical loads. The proposed system is composed of passive filter and Z-source topology inverter. As an ESS(Energy Storage System) of the proposed system is employed the Proton Exchange Membrane Fuel Cells (PEMFC). To calculate and control the harmonics and compensation voltage, i<SUB>d</SUB>-i<SUB>q</SUB> in dq rotating reference frame and PI controller are used. In case that three-phase voltage sags occurred, a PSIM simulation was done for the performance comparison of the conventional method employed battery stacks and proposed method. As a result, considering the voltage compensation performance, each method was nearly similar. Also, the compensation performance and the %THD(%Total Harmonic Distortion) result under the various source voltage conditions (sag or swell) were presented and discussed to show the performance of the proposed system.

유도모터의 스위칭 소음저감을 위한 2상 및 3상 RCD-PWM기법의 파워 스펙트럼

정영국,위석오,임영철 전력전자학회 2004 전력전자학회 논문지 Vol.9 No.2

This paper proposes a two-phase RCD-PWM scheme which is much better than a three-phase RCD-PWM scheme from the standpoint of the broadening and linearizing effect of the power spectrum. To implement the proposed scheme and conventional scheme, the experiment based on the SAB-C167 micro-controller was executed. Based on the space vector modulation technique, the duty ratio of the pulses is calculated using the SAB-C167 and each of PWM pulses is located randomly in each switching interval. The power spectrum of the output voltage, output current, the d.c link current and the acoustic noise radiated from inverter drives are experimentally investigated. Then, the performance of the proposed scheme was compared and discussed with the conventional scheme. 본 연구에서는 3상 RCD(Random Pulse Centered Displacement) PWM기법에 비하여 구현이 용이하고 스위칭 주파수의 정수배 스펙트럼의 광대역화와 선형화의 효과가 우수한, 2상 RCD-PWM을 제안하였으며, 그 파워 스펙트럼을 비교하고 있다. 종전의 3상 RCD-PWM과 제안된 2상 RCD-PWM을 구현하기 위하여, 16비트 고성능 마이크로 컨트롤러 SAB-C167이 사용되었다. SAB-C167에 의하여 각 변조 구간에서의 듀티비를 구한 후, 선형 랜덤 발생기를 이용하여 균일한 확률 분포로 각 상의 펄스의 위치를 재배치하였다. 제안된 2상 RCD-PWM에 의한 모터 전압과 전류 그리고 직류링크 전류의 파워 스펙트럼 및 모터의 가청 스위칭 소음 효과를 종전의 3상 RCD-PWM과 비교 검토하였다.

DSP를 사용한 능동전력필터 시스템 개발

정영국 대불대학교 1996 論文集 Vol.2 No.2

This paper proposes a novel system of DSP based active power filter with real-time power analyzing/compensating function. A developed system is made up of 486-PC and DSP(digital signal processor) board, IGBT power module, nonlinear load, and power analyzing and control program for windows. Power is analyzed using signal processing techniques based on the correlation between voltage and current waveforms. Since power analysis algorithm is performed by DSP. power analysis is achieved in real-time even under highly dynamic nonlinear loading conditions. Combining control algorithm with power analysis algorithm, flexibility of a developed system which has both power analysis mode and control mode, is greatly inhenced. To verify the validity of a developed system, the experimental system of a 1KVA maximum power rating is used for compensating nonactive (reactive and distorted) current generating while thyristor speed controller of induction motor is operating. From experimental results, it is clear that under highly distorted, dynamically changing current conditions, the compensation system and controller are capable of compensating nonlinear load to a nearly unity power factor, with nonactive current compensation. Also, various graphic screens of time domain/frequency domain/ 3-D current coordinates are displayed with experimental results on 486-PC by a developed system. Finally, because power analysis capability of the proposed system is excellent, it is expected that the proposed system can be applied to DSP based power analyzer as well as high power reactive power compensator.

수치해석을 통한 Spiral 형상 화학 반응기의 열전달 특성

정영국(Young-Guk Jung),이진규(Jin-Gyu Lee),이주한(Ju-Han Lee),서태범(Tae-Beom Seo) 대한설비공학회 2010 설비공학 논문집 Vol.22 No.1

The purpose of the research is to develop the high performance solar chemical reactor for producing hydrogen using steam reforming reaction of methane. A specific shape chemical reactor is suggested:spiral type reactor. The reactor is installed on the dish-type solar thermal system of Inha University. The temperatures, CH₄ conversion rates, and H₂ proportion are measured. At specific condition, CH₄ conversion rates of the spiral type reactor are about 91%, and H₂ proportion are about 66%. The spiral type reactor gives reasonably good performance without any problems caused by highly concentrated solar radiation.

중성선 전류 및 고조파류 저감을 위한 공간벡터 검출법 기반의 3상 4선식 능동전력필터

정영국,김영철 대불대학교 2004 大佛大學校大學院 硏究論文集 Vol.3 No.-

This paper deals with a space vector detection based a 3-phase 4-wire 4-leg active power filter which is proposed for reduction harmonic and neutral current in a 3-phase 4-wire supply system. The harmonics are cal-culated by the space vector detection and the neutral current is calculated from load current. The proposed system separately compensates harmonic and neutral current. For the investigation of a desired performance, the de-veloped algorithm is simulated using a PSIM. And steady state as well as transient state results are given and discussed in detail.

Solar Load 조건에서의 Spoiler Dog House Slot Movement에 대한 해석 기법 연구

정영국(Youngguk Jung),선광상(Kwangsang Seon),조현성(Hyunsung Jo),김용석(Yongsuk Kim) 한국자동차공학회 2017 한국자동차공학회 학술대회 및 전시회 Vol.2017 No.11