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정기덕(Jung, Kideok),정주호(Jung, Juho),김민정(Kim, Minjung),조민효(Cho, Rosa Minhyo) 서울행정학회 2017 한국사회와 행정연구 Vol.28 No.2
본 연구는 김영란법의 정책결정과정을 분석하고 정책적 함의를 제시하기 위하여 다중흐름모형과 정책옹호연합모형의 융합모형을 활용하였다. 이를 통해 단일모형의 한계를 극복하고 정책결정 과정을 보다 더 정밀히 분석하고자 하였다. 분석결과 문제·정치·대안의 세 가지 흐름이 확인되었고, 흐름들이 독립적으로 흘러가는 가운데 추친옹호연합과 저지옹호연합 간 세 번의 갈등이 발생하였다. 세월호 침몰사고가 외부충격으로 작용하며 국회에서 계류 중이던 김영란법이 다시 주목받게 되었다. 또한 이완구 국무총리 후보자의 녹취록 공개사건이 내부충격으로 발생하며 정책의 창이 열렸다. 이때 김영란법은 국회 본회의를 통과하였으나 옹호연합들 간 갈등은 계속 이어졌고, 헌법재판소의 합헌 판결 끝에 갈등이 소강되고 김영란법은 계획대로 시행되었다. 이러한 분석결과는 실제 정책결정이 우연한 사건 등을 포함한 다양한 요인들의 상호작용을 통해 매우 복잡하게 이루어지기 때문에 체계적인 분석을 위해서는 하나의 모형에만 의존하기 보다는 다양한 모형들의 적절한 수정 또는 융합이 유용함을 보여준다. The purpose of this paper is to critically analyze the policymaking process of Improper Solicitation and Graft Act, often referred to as the Kim Young-ran Act, and suggest the policy implications. Authors use a combined model of the Advocacy Coalition Framework and the Multiple Streams Framework to overcome the limitations of the single model and examines policy change more precisely. Results show that three flows of problems, politics, and alternatives were confirmed, and conflicts between the advocacy coalition occurred three times while the flows flowed independently. The tragic sinking of ferry Sewol was an external shock and attracted the attention to Kim Young-ran Act, which had been pending in the National Assembly. In addition, revealing the tape-recording case of Prime Minister Lee Wan-koo was an internal shock which opened a window of policy. At this moment, Kim Young-ran Act passed the National Assembly plenary session, however, the conflict between the advocacy alliances continued. After the constitutional decision by Constitutional Court, the conflict was lulled and Kim Young-ran Act was implemented as planned. These findings suggest that proper modification or convergence of policy making model is useful for comprehensive and systematic analysis, rather than relying solely on single model, since the actual policy decisions are made very complex interaction of various factors including accidental events.
A-Rong Kim,Gyeong-Hun Kim,Kwang-Min Kim,Jin-Geun Kim,Dae-Won Kim,Minwon Park,In-Keun Yu,Seok-Ho Kim,Kideok Sim,Ki-Chul Seong IEEE 2010 IEEE transactions on applied superconductivity Vol.20 No.3
<P>The Superconducting Magnetic Energy Storage (SMES) system is a key technology for overcoming the voltage sag, swell, interruption, and frequency fluctuation with the fast response speed of current charge and discharge. A toroidal-type SMES is designed using a 3D CAD program, and the inductance and AC loss characteristic during operation are analysed using Finite Element Method (FEM) program. The toroidal-type magnet consists of 30 double pancake coils (DPC). The single pancake coils (SPC), constituting the double pancake coils, are arranged at an angle of 6° from each other, based on the central axis of the toroidal-type magnet. The conduction cooling method is used for the toroidal-type SMES cooling. To evaluate the characteristics of the over-mega-joule class grid-connected HTS SMES system, the authors implemented a simulation by which the SMES coil could be connected to the Real Time Digital Simulator (RTDS). Using the simulation, users can perform voltage sag and frequency stabilization simulations with a real SMES coil in real time and easily change the capacity of the SMES system as much as they need. The effectiveness of the toroidal-type HTS SMES system is demonstrated through the RTDS-based simulation and the results are briefly discussed.</P>
Design of a 10 kJ Class SMES Model Coil for Real Time Digital Simulator Based Grid Connection Study
A-Rong Kim,Hee-Yeol Jung,Jae-Ho Kim,Minwon Park,In-Keun Yu,Seok-Ho Kim,Kideok Sim,Hae-Jong Kim,Ki-Chul Seong IEEE 2009 IEEE transactions on applied superconductivity Vol.19 No.3
<P>Superconducting magnetic energy storage (SMES) system is having increased attention in power system application because of its higher efficiency and faster response. Before the installation of the SMES into utility, the system analysis has to be carried out with a certain simulation tool. Using the Real Time Digital Simulator (RTDS), electrical properties of the miniaturized SMES model coil (75 J) for voltage sag compensation were demonstrated through a previous research work. The simulation results represented the same characteristics as those of large capacity SMES coil (1 MJ). Based on these results, design specifications of the 10 kJ SMES model coil were developed and several necessary analyses were performed for the RTDS based grid connection study in this work.</P>
Connection algorithm of Real Time Digital Simulator with HTS SMES for power quality improvement
A-Rong Kim(김아롱),Dae-Won Kim(김대원),Gyeong-Hun Kim(김경훈),Jin-Geun Kim(김진근),Minwon Park(박민원),In-Keun Yu(유인근),Kideok Sim(심기덕),SeockHo Kim(김석호),Ki-Chul Seong(성기철) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.7
Superconducting Magnetic Energy Storage (SMES) system is one of the key technologies to overcome the voltage sag, swell, interruption and frequency fluctuation by fast response speed of current charge and discharge. In order to evaluate the characteristics of over mega joule class grid connected High Temperature Superconducting (HTS) SMES system, the authors proposed an algorithm by which the SMES coil could be connected to the Real Time Digital Simulator (RTDS). Using the proposed algorithm, users can perform the simulation of voltage sag and frequency stabilization with a real SMES coil in real time and easily change the capacity of SMES system as much as they need. To demonstrate the algorithm, real charge and discharge circuit and active load were manufactured and experimented. The results show that the current from real system was well amplified and applied to the current source of simulation circuit in real time.
전도 냉각형 10kJ 고온 초전도 에너지 저장장치의 열 부하 특성 해석
김광민(Kwang-Min Kim),김아롱(A-Rong Kim),김진근(Jin-Geun Kim),박해용(Hae-Yong Park),박민원(Minwon Park),유인근(In-Keun Yu),김석호(Seok-Ho Kim),심기덕(Kideok Sim) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.7
The characteristics of the Superconducting Magnetic Energy Storage (SMES) system are faster response, longer life time, more economical, and environment friendly than other Uninterruptible Power Supply (UPS) using battery. Fast charge and discharge time of SMES system can provide powerful performance of improving power quality in the grid. In order to demonstrate the effectiveness of SMES, the authors make a 10kJ SMES system for connection with RTDS (Real Time Digital Simulator). Because the characteristics of superconducting magnet are very important in SMES system, the necessary items such as thermal characteristic, mechanical stress and protection circuit should be considered. In this paper, the authors experimented thermal characteristics of the 10kJ SMES system. The experiment was accomplished using a simulation coils made of aluminium. It has same dimension of the 10kJ class HTS SMES coil. The coil was cooled with GM (Gifford -McMahon) cryocooler through the OFHC (Oxgen Free High thermal Conductivity) conduction bar. The test results of cool down and heat loads characteristics of the simulation coils are described in detail.
소형 HTS SMES와 실시간 전력계통 시뮬레이터의 연계 알고리즘 제안
김아롱(A-Rong Kim),김경훈(Gyeong-Hun Kim),김광민(Kwang-Min Kim),박민원(Minwon Park),유인근(In-Keun Yu),심기덕(Kideok Sim),김석호(Seok-Ho Kim),성기철(Ki-Chul Seong),박영일(Youngil Park) 대한전기학회 2010 전기학회논문지 Vol.59 No.1
Superconducting Magnetic Energy Storage (SMES) system is one of the key technologies to overcome the voltage sag, swell, interruption and frequency fluctuation by fast response speed of current charge and discharge. In order to evaluate the characteristics of over mega joule class grid connected High Temperature Superconducting (HTS) SMES system, the authors proposed an algorithm by which the SMES coil could be connected to the Real Time Digital Simulator (RTDS). Using the proposed algorithm, users can perform the simulation of voltage sag and frequency stabilization with a real SMES coil in real time and easily change the capacity of SMES system as much as they need. To demonstrate the algorithm, real charge and discharge circuit and active load were manufactured and experimented. The results show that the current from real system was well amplified and applied to the current source of simulation circuit in real time.
Kim, Sung-Hwan,Kim, Kideok,Go, Myungjun,Park, Joong Yull IOP 2018 Journal of micromechanics and microengineering Vol.28 No.12
<P>External pumps (e.g. syringe pump) that operate microfluidic fuel cell (MFFC) devices are inefficient because the amount of electricity required to run such pumps easily exceeds that generated by the MFFC. Herein, we propose a suitable small, lightweight, and external power-free osmosis-driven pump embedded with an MFFC system, capable of steady-flow generation. Methanol and vanadium are used as fuel, and the electrodes are made of carbon paper. We do not utilize sputtering equipment, commonly used for electrode fabrication. To incorporate the carbon paper-based electrode into the MFFC, the cross section of the microchannel is uniquely designed into a bridge-shaped channel, and its electrochemical and fluid dynamic influences are analyzed through experiments and simulations. The total weight of our MFFC system is less than 20 g, the size is approximately 5 cm, and the power density generated is approximately 0.3 mW cm<SUP>−2</SUP>. The presented methods will contribute to the development of standalone MFFCs operable for prolonged durations (~1 d), thereby enhancing the possibility of MFFC commercialization.</P>