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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
Journal Basic Information
Journal DOI :
The Korean Institute of IIIuminating and Electrical Installation Engineers
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Volume & Issues
Volume 27, Issue 12 - Dec 2013
Volume 27, Issue 11 - Nov 2013
Volume 27, Issue 10 - Oct 2013
Volume 27, Issue 9 - Sep 2013
Volume 27, Issue 8 - Aug 2013
Volume 27, Issue 7 - Jul 2013
Volume 27, Issue 6 - Jun 2013
Volume 27, Issue 5 - May 2013
Volume 27, Issue 4 - Apr 2013
Volume 27, Issue 3 - Mar 2013
Volume 27, Issue 2 - Feb 2013
Volume 27, Issue 1 - Jan 2013
Selecting the target year
The Dimming Methods of LED Lamps to Minimize Flicker for the Broadcasting Lighting
Kim, Doyoung ; Yun, Janghee ; Ryeom, Jeongduk ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 27, issue 7, 2013, Pages 1~7
DOI : 10.5207/JIEIE.2013.27.7.001
LED lamps are appropriate to the light source for use in broadcasting lighting. When the lighting frequency of LED lamp is different from the shutter frequency of camera, however, the flicker appears on the moving image which is taken by the camera under the dimmed light of LED lamp with conventional dimming methods. In this study, a new dimming method for the LED lamps used as the broadcasting lighting is proposed to minimize the flicker. A lighting period in the proposed dimming method is divided into the several sub-periods which have weight of the bits. Also, the proposed dimming method has characteristics that are optimizing the turn-on timings of two LED lamps to reduce the turn-off periods of the lamps and not to overlap the turn-on periods of the lamps. In the experiments, the incidence of the flicker is taken by the camera under several lighting conditions of the conventional dimming methods and the proposed dimming method. In addition, the brightness values of the frames are obtained in the moving image, and incidence of the flicker is evaluated and compared with conventional methods. From the results, the incidence of the flicker in the proposed method is more improved than the conventional methods.
Analysis of Arc Characteristics in Power Conversion Systems
Seo, Hyun-Uk ; Choe, Gyu-Ha ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 27, issue 7, 2013, Pages 8~16
DOI : 10.5207/JIEIE.2013.27.7.008
This paper investigates the electrical characteristics of popular power converters such as a half-bridge rectifier, a full-bridge rectifier, a buck converter, and an inverter when the arc is occurred at the input and the output of each converter. In order to generate an artificial arc, the arc generator has been implemented according to the design guideline suggested in UL1699. After that, the trend of the input and output voltage variation and the switching stress of the devices are analyzed. From the analysis, it has been confirmed that the generated arc causes an uncertain operation to the power converters. To reduce the unexpected disturbance effect of the arc, the capacitor adjustment method has been proposed, and its superiority has been experimentally verified.
Robust Controller Design for the Regulation of Currents in a Three-phase Load
Jee, Sujung ; Jo, Nam-Hoon ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 27, issue 7, 2013, Pages 17~23
DOI : 10.5207/JIEIE.2013.27.7.017
The regulation of currents in a three-phase load is an important issue for electric power systems. The most popular conventional method is a decoupling controller that compensates the coupling terms arising from DQ rotating frame transformation. Although the decoupling controller achieves decent performance in the absence of load parameter uncertainties, the variation of parameters causes performance to degrade intolerably. In this paper, we propose to use disturbance observer based controller to improve the control performance in spite of the parameter uncertainties. The computer simulation study validates the effectiveness of the proposed method.
A Study on the Evaluation of Reliability of the Vacuum Circuit Breaker for the Electrical Fire
Choi, Hong-Kyoo ; Park, Joon-Yeol ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 27, issue 7, 2013, Pages 24~28
DOI : 10.5207/JIEIE.2013.27.7.024
Fire-hited electrical equipment has possibility of deterioration. So its replacement is essential in terms of safety. However, the economic burden is increased. Therefore, the replacement or re-use of it is to be determined by tests. But the research of Integrity Assessment on Fire-hited electrical equipments is very rare. In this paper, we tested to determine the replacement or re-use of Fire-hited vacuum circuit breaker. And provided the data for the integrity assessment through the analysis of its deterioration.
A Study on Accurate Phasor Extraction Using a New DC Offset Elimination Filter
Park, Chul-Won ; Yoon, Hee-Whan ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 27, issue 7, 2013, Pages 29~36
DOI : 10.5207/JIEIE.2013.27.7.029
In this paper, a new DC offset elimination filter is proposed for an accurate phasor extraction of fundamental frequency component. The proposed method can eliminate a DC offset component which is decayed exponentially. The proposed method uses only one cycle of data for phasor extraction computation, which does not need to preset the time constant of the DC offset component. Also, the other advantages of the proposed method is that gain compensation or phase compensation is not required after filtering. Simulations using ATP were performed to evaluate the performance of the proposed filter method, and the results were compared to the ones obtained by conventional methods.
A Study on the Ground Fault Current Distribution by Single Phase-to-Neutral Fault Tests in Power Distribution System
Kim, Kyung-Chul ; You, Chang-Hun ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 27, issue 7, 2013, Pages 37~44
DOI : 10.5207/JIEIE.2013.27.7.037
Phase to ground faults are possibly one of the maximum number of faults in power distribution system. During a ground fault the maximum fault current and neutral to ground voltage will appear at the pole nearest to the fault. Distribution lines are consisted of three phase conductors, an overhead ground wire and a multigrounded neutral line. In this paper phase to neutral faults were staged at the specified concrete pole along the distribution line and measured the ground fault current distribution in the ground fault current, three poles nearest to the fault point, overhead ground wire and neutral line. A simplified equivalent circuit model for the distribution system under case study calculated by using MATLAB gives results very close to the ground fault current distribution yielded by field tests.
Study on the Temporal Density Variation of Chemical Species in the Atmospheric Pressure Plasma Process
Han, Sang-Bo ; Park, Sung-Su ; Kim, Jong-Hyun ; Park, Jae-Youn ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 27, issue 7, 2013, Pages 45~51
DOI : 10.5207/JIEIE.2013.27.7.045
This study is to discuss simulation results with 51 principal chemical reactions in non-thermal plasma space under atmospheric pressure, and the ambient gas was mainly composed of oxygen and nitrogen molecules. The initial density of O and OH radicals under the ambient temperature of 300K is largely generated in comparison with other higher temperature, and the density of O radical decreased from
according to increase the temperature. The initial density of OH radical seemed to decrease steeply at the initial stage. By increasing the initial density of
molecules, O radical's effect was few and the density of OH radical was largely generated about 2 times. In addition, ozone density was increased as increasing the density of O radical, but it was decreased as increasing the density of
. In case of the temperature more than 300K,
tend to be removed, but NO was increased than the initial density.
Reconstruction of the Electron Density Profile in O-mode Ultrashort Pulse Reflectometry using a Two-dimensional Finite Difference Time Domain
Roh, Young-Su ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 27, issue 7, 2013, Pages 52~58
DOI : 10.5207/JIEIE.2013.27.7.052
The two-dimensional finite difference time domain algorithm is used to numerically reconstruct the electron density profile in O-mode ultrashort pulse reflectometry. A Gaussian pulse is employed as the source of a probing electromagnetic wave. The Gaussian pulse duration is chosen in such a manner as to have its frequency spectrum cover the whole range of the plasma frequency. By using a number of numerical band-pass filters, it is possible to compute the time delays of the frequency components of the reflected signal from the plasma. The electron density profile is reconstructed by substituting the time delays into the Abel integral equation. As a result of simulation, the reconstructed electron density profile agrees well with the assumed profile.
Motor Control Method for Four-Switch Inverters with DC-link Voltage Ripple Compensation Algorithm
Lee, Dong-Myung ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 27, issue 7, 2013, Pages 59~66
DOI : 10.5207/JIEIE.2013.27.7.059
This paper proposes a new voltage reference generation method for Four-Switch Inverters(FSI) with compensation of the neutral DC-link voltage variation. Since FSIs have the split DC-link causing the inherent problem of voltage fluctuations in the upper and lower capacitors, it is required to take account the voltage difference between the top and bottom capacitors. In this paper, to reduce the effect by the voltage variation, reference voltages are modified by adding compensation voltages proportional to the voltage difference between upper and lower capacitors. Simulation results showing control performance of induction and permanent magnet motors demonstrate the validity of the proposed method.
The Dual Design of Fuel Cell Hybrid Power System using Dual Converter PCS
Shin, Soo-Cheol ; Lee, Hee-Jun ; Hong, Suk-Jin ; Kim, Hak-Sung ; Won, Chung-Yuen ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 27, issue 7, 2013, Pages 67~75
DOI : 10.5207/JIEIE.2013.27.7.067
In this paper, parallel input/serial output dual converter is designed appropriately for fuel cell hybrid power system. In case of proposed converter, zero voltage switching condition is designed without additional resonance device using leakage inductance of transformer and output capacitance of switch, and zero voltage switching method is used. Also, the system method is for increasing power by connecting half-bridge in parallel and increasing output voltage by connecting secondary output of transformer in serial. Through this method we can increase power and decrease volume of system. So in this paper, dual converter is designed. 1.5kW fuel cell hybrid power system was implemented, and system operation and stability was verified through experiment.
An Effective Pedagogical Method for Nodal Analysis in Linear Circuit
Kim, Gwang Won ; Hyun, Seung-Ho ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 27, issue 7, 2013, Pages 76~81
DOI : 10.5207/JIEIE.2013.27.7.076
This paper presents an effective pedagogical method for nodal analysis in linear circuit. In the proposed method, basic equations are built only for passive elements and independent current sources. And then, the basic equations are modified by considering other sources such as voltage sources and dependent current sources. In the proposed method, the equations are presented in form of a matrix and a vector of which elements are built systematically by considering every element in a circuit one by one. This make the proposed method easy to apply to intricately composed circuit and easy to solve the final simultaneous equations and easy to realize as computer program for nodal analysis and easy to memorize compared to the conventional method.
A Consideration of Volume and Installation Method of Concrete-Embedded Foundation Earthed an Electrode
Lee, Ju-Cheol ; Lee, Young-Chul ; Kim, Jae-Chul ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 27, issue 7, 2013, Pages 82~88
DOI : 10.5207/JIEIE.2013.27.7.082
IEC standards do not require to limit the earthing resistance of the concrete-embedded foundation earthing electrode which is installed to a specific value. However, in Korea the value of
and below applies to the earthing resistance for a domestic customer whose receiving voltage is 22.9kV. This paper calculates the minimum area and volume of the concrete-embedded foundation earthing electrode in order to obtain a specific value of the earthing resistance when the electrode of the building's lightning protection system and that of its power system are interconnected. It also suggested the most appropriate method of installing the foundation earthing electrode, taking the electric characteristics of concrete into account.
Simulation Method on the Protection Effects of Voltage-Limiting Type SPDs Associated with the Protective Distance
Lee, Bok-Hee ; Kim, You-Ha ; Ahn, Chang-Hwan ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 27, issue 7, 2013, Pages 89~94
DOI : 10.5207/JIEIE.2013.27.7.089
This paper presents a method of simulating the protection effects of surge protective devices(SPDs) depending on the protective distance and types of input impedance of load to be protected. In order to analyze the protective performances of voltage-limiting type SPDs associated with the reflection and oscillation phenomena, the terminal voltage across load being protected and the residual voltage of SPDs were simulated by using EMTP model as functions of the protective distance and types of input impedance of loads. As a consequence, SPDs should be installed by taking into account the protective distance and input impedance of loads to achieve reliable protection of electrical and electronic equipment from lightning and switching surges. It is expected that the simulation method proposed in this paper could be practically used in design for installing SPDs in low-voltage distribution systems.
Frequency Response Method Based Controller Design of High-Speed Pantograph for Improving Transient Response
Lee, Joo-Won ; Jo, Nam-Hoon ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 27, issue 7, 2013, Pages 95~100
DOI : 10.5207/JIEIE.2013.27.7.095
In this paper, we propose an active controller for high-speed pantograph in order to improve the transient response. Electrical power is delivered from a catenary to the train via a pantograph and thus it is very important to regulate the contact force between catenary and pantograph. By regarding the catenary displacement as an unknown disturbance input and analyzing the frequency response from the disturbance to contract force. we present an active controller that utilizes the lead compensator and resonant controller. It is shown by the computer simulation that the substantial improvement in transient response can be achieved by the proposed controller.
A Study on the Installation Method of Down Conductors of the Lightning Protection System, using Rebar in Reinforced Concrete Structures
Lee, Young-Chul ; Lee, Ju-Cheol ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 27, issue 7, 2013, Pages 101~107
DOI : 10.5207/JIEIE.2013.27.7.101
IEC Standards on lightning protection system specify the use of natural components as down conductors. This paper provides an analysis of problems revealed from our field investigation and survey conducted for the relevant experts in the construction site where natural components are used as down conductors. It also considers a suitable condition for installing natural components as down conductors in accordance with the latest version of the standard. As a result, when rebars of reinforced concrete are used as down conductors, vertical bars consisting of rebars of which thickness is not less than D13(
) should be connected by welding, clamps or bound joints, using appropriate connection components conforming to IEC Standards. The lashed joints, however, shall not be applied for down conductors.