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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 20, Issue 10 - Dec 2006
Volume 20, Issue 9 - Nov 2006
Volume 20, Issue 8 - Sep 2006
Volume 20, Issue 7 - Aug 2006
Volume 20, Issue 6 - Jul 2006
Volume 20, Issue 5 - Jun 2006
Volume 20, Issue 4 - May 2006
Volume 20, Issue 3 - Mar 2006
Volume 20, Issue 2 - Feb 2006
Volume 20, Issue 1 - Jan 2006
Selecting the target year
Implementation of Spatial Light Modulator(SLM) using a Commercial LCD Beam Projector
Ko, Jung-Hwan ; Lee, Jae-Soo ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 20, issue 9, 2006, Pages 1~10
DOI : 10.5207/JIEIE.2006.20.9.001
In this paper, a new high resolution XGA-SLM is implemented through modification of a commercial TFT-LCD beam projector and its optical modulation characteristics as a spatial light modulator(SLM) is also analyzed. First, the optics module, projection lamp and fans are removed from a commercial beam projector and instead some electric circuits to compensate their removal are manufactured and then, by inserting them into the beam projector, a new XGA-SLM is finally implemented. Second, from some optical experimental results, this TFT-SLM is found to have a good optical linearity in amplitude and phase modulation characteristics as a function of the input gray levels. Especially, through implementation of a binary phase-type correlator such as BPEJTC by using the suggested TFT-LCD panel, the implemented SLM is proposed as a new relatively low-cost and high resolution SLM for optical information processing.
Investigation of Interplay between Driving Voltage of MZ Modulators and Bandwidth of Low-pass Filters in Duobinary Modulation Formats
Lee, Dong-Soo ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 20, issue 9, 2006, Pages 11~17
DOI : 10.5207/JIEIE.2006.20.9.011
We have theoretically investigated the effects of the interplay between the driving voltage of Mach-Zehnder(MZ) modulators and the bandwidth of low-pass filters(LPF) in 10[Gb/s] duobinary modulation systems. For the change of driving voltage ratios(driving voltage/switching voltage), the transmission performance has been evaluated over 200[km] of single-mode fiber(SMF) systems. For driving voltage ratios with smaller than 100[%], the transmission performance has been maintained and greatly affected by the bandwidth of LPFs than the driving voltage. For driving voltage ratios with larger than 100[%], the transmission performance has been degraded and is not sensitive to the bandwidth of LPFs. To see the limitation of driving voltage, we have reduced the driving voltage ratio to 50[%]. Our results suggest that 10[Gb/s] duobinary signals with driving voltage ratio with smaller than 100[%] have been transmitted over 200[km] SMF within 2[dB] power penalty without dispersion compensation. For the driving voltage ratio with 50[%], we have verified that the transmission performance was maintained.
Development of the Power Restoration Training Simulator for Jeju Network
Lee, Heung-Jae ; Park, Seong-Min ; Lee, Kyeong-Seob ; Song, In-Jun ; Lee, Nam-Ho ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 20, issue 9, 2006, Pages 18~23
DOI : 10.5207/JIEIE.2006.20.9.018
This paper presents an operator training simulator for power system restoration against massive blackout. The system is designed especially focused on the generality and convenient setting up for initial condition of simulation. The former is accomplished by using power flow calculation methodology, and PSS/E data is used to set up the initial state for easy setting. The proposed simulator consists of three major components-a power flow(PF), a data conversion(CONV), and, a GUI module. The PF module calculates power flow, and then checks over-voltages of buses and overloads of lines. The CONV module composes a Y-Bus array and a database at each restoration action. The initial Y-Bus array is composed from PSS/E data. A user friendly GUI module is developed including a graphic editor and a built-in operation manual. The maximum processing time for one step operation is 15 seconds, which is adequate for training purpose.
On a Posture Control of Human Robot Master Arm
Moon, Jin-Soo ; Kim, Cheul-U ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 20, issue 9, 2006, Pages 24~31
DOI : 10.5207/JIEIE.2006.20.9.024
This study developed a human robot mast arm, which has a structure similar to the human arm, with the objective of taking over human works. The robot arm was structured to reproduce human actions using three axes on each of the shoulder and the wrist based on mechanics, and the actuator of each axis adopted an ordinary DC motor. The servo system of the actuator is a one body type employing an amp for electric power, and it was designed to be small and lightweight for easy installation. We examined the posture control characteristics of the developed robot mast arm in order to test its interlocking, continuous motions and reliability.
An online Calibration Algorithm using binary spreading code for the CDMA-based Adaptive Antenna Array
Lee, Chong-Hyun ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 20, issue 9, 2006, Pages 32~39
DOI : 10.5207/JIEIE.2006.20.9.032
In this paper, an iterative subspace-based calibration algorithm for a CDMA-based antenna array in the presence of unknown gain and phase error is presented. The algorithm does not depend on the array geometry and does not require a prior knowledge of the Directions Of Arrival (DOA) of the signals. The method requires the code sequence of a reference user only. The proposed algorithm is based on the subspace method and root finding approach, and it provides estimates of the calibration vector, the DOA and the channel impulse response, by using the code sequence of a reference user. The performance of the proposed algorithm was investigated by means of computer simulations and was verified using field data measured through a custom-built W-CDMA test-bed. The data show that experimental results match well with the theoretical calibration algorithm. Also, teh study propose an efficient algorithm using the simulated annealing technique. This algorithm overcomes the requirement of initial guessing in the subspace-based approach.
Implementation of Tuneable Filter Using CPW Coupled Line and Varactor Diode
Park, Jeong-Heum ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 20, issue 9, 2006, Pages 40~44
DOI : 10.5207/JIEIE.2006.20.9.040
This study investigated a new tuneable bandpass filter based on coplanar waveguide coupled line structure, and using the varactor diode for tuning the center frequency of the filter. The filter was designed by a commercial simulator and had a tuning range of 180[MHz] from 0.95[GHz] to 1.13[GHz]. The filter acceptable values regarding the insertion loss was less than 3[dB] and its return loss greater than 12[dB]. The figure of merit of the implemented tuneable filter increased with the reverse bias voltage up to 14[V] on the varactor diode. The proposed filter has a promising future as it can be used in integration processes and in various materials as substrate.
Effective Route Decision of an Automatic Moving Robot(AMR) using a 2D Spatial Map of the Stereo Camera System
Lee, Jae-Soo ; Han, Kwang-Sik ; Ko, Jung-Hwan ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 20, issue 9, 2006, Pages 45~53
DOI : 10.5207/JIEIE.2006.20.9.045
This paper proposes a method for an effective intelligent route decision for automatic moving robots(AMR) using a 2D spatial map of a stereo camera system. In this method, information about depth and disparity map are detected in the inputting images of a parallel stereo camera. The distance between the automatic moving robot and the obstacle is detected, and a 2D spatial map is obtained from the location coordinates. Then the relative distances between the obstacle and other objects are deduced. The robot move automatically by effective and intelligent route decision using the obtained 2D spatial map. From experiments on robot driving with 240 frames of stereo images, it was found that the error ratio of the calculated distance to the measured distance between objects was very low, 1.52[%] on average.
A Study on the Harmonics Effect of SVC in Electric Arc Furnace Loads
Kim, Kyung-Chul ; Jin, Seong-Eun ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 20, issue 9, 2006, Pages 54~60
DOI : 10.5207/JIEIE.2006.20.9.054
Large steel industries have time-varying nonlinear loads such as electric arc furnaces. These nonlinear loads generate harmonic currents and create distortions on the sinusoidal voltage of the power system. The main objective of the static var compensator is to maintain the rms voltage at the point of common coupling within the limit. In this research, harmonic mitigation studies were conducted with and without the SVC, and time-varying harmonics were evaluated according to the international harmonic standards (IEC 61000-3-6 and IEEE Std. 519) using a cumulative probabilistic approach.
Assesment of the Decrement in Tensile Strength of an Overhead Transmission Line's Conductor in Korean Power System
Bae, In-Su ; Kim, Dong-Min ; Kim, Jin-O ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 20, issue 9, 2006, Pages 61~69
DOI : 10.5207/JIEIE.2006.20.9.061
The tensile strength of an overhead transmission line's conductor in response to an aging is being assessed in this paper. It is our view that, the decrement in the conductor's tensile strength is a key index that can be used to determine a conductor's end of life and a current limits. This paper describes a probabilistic method of assessing this index for main transmission lines which are responsible for the north bound power flow in the Seoul metropolitan area. Such an assessment can be a useful guide for economic system operation.
Current Limiting Characteristics of a Flux-Lock Type SFCL for a Single-Line-to-Ground Fault
Oh, Geum-Kon ; Jun, Hyung-Seok ; Lee, Na-Young ; Choi, Hyo-Sang ; Nam, Gueng-Hyun ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 20, issue 9, 2006, Pages 70~77
DOI : 10.5207/JIEIE.2006.20.9.070
We have fabricated an integrated three-phase flux-lock type SFCL, which consists of an YBCO(
) thin film and a flux-lock reactor wound around an iron core of each phase. In order to apply the SFCL in a real power system, fault analyses for the three-phase system are essential. The short-circuit currents were effectively limited by adjusting the numbers of winding of each secondary coil and their winding directions. The flux flow generated in the iron core cancelled out under the normal operation due to the parallel connection between primary and secondary windings. However, the flux-lock type SFCL with same iron core was operated just after the fault due to the flux generating in the iron core. To analyze the current limiting characteristics, the additive polarity winding was compared with the subtractive one in the flux lock reactor. Whenever a single line-to-ground fault occurred in any phase, the peak value of the line current of the fault phase in the additive polarity winding increased up to about 12.87 times during the first-half cycle. On the other hand, the peak value in the subtractive polarity winding increased up to about 34.07 times under the same conditions. This is because the current flow between the primary and the secondary windings changed to additive or subtractive status according to the winding direction. We confirmed that the current limiting behavior in the additive polarity winding was more effective for a single-line-to-ground fault
Derivation of Distributed Generation Impact Factor in a Networked System in Case of Simultaneous Outputs of Multiple Generation Sites
Lim, Jung-Uk ; Runolfsson, Thordur ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 20, issue 9, 2006, Pages 78~83
DOI : 10.5207/JIEIE.2006.20.9.078
A new measure, the distributed generation impact factor (DGIF), is used for evaluating the impact of newly introduced distributed generators on a networked distribution or a transmission system. Distribution systems are normally operated in a radial structure. But the introduction of distributed generation needs load flow calculation to analyze the networked system. In the developed framework, the potential share of every generation bus in each line flow of a networked system can be directly evaluated. The developed index does not require the solution of power flow equations to evaluate the effect of the distributed generation. The main advantage of the developed method lies in its capability of considering simultaneous outputs of multiple generation sites.
Analysis of the Thickness Effect for Hysteresis Ring of Hysteresis Motor with Vector Hysteresis Model
Hong, Sun-Ki ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 20, issue 9, 2006, Pages 84~89
DOI : 10.5207/JIEIE.2006.20.9.084
This paper presents the thickness effect of hysteresis ring of hysteresis motor using finite element method combined with a vector hysteresis model. From the magnitude and direction of the magnetic field intensity, the magnetization of each ring element is calculated by a vector hysteresis model. The developed torque can be obtained with the vector sum of individual torque of each element on the hysteresis ring. From these calculations, it can be found that the motor torque is not in proportion to the thickness of the ring. As a result, there exists a proper point of thickness and that can be determined using the proposed methoㅇ in this paper.
Reseach on the System to Activate the Home Net-working Industry through a Standardized Certification System for Residential Properties
Choi, Byung-Kyu ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 20, issue 9, 2006, Pages 90~102
DOI : 10.5207/JIEIE.2006.20.9.090
In this study, it has been attempted to build up a smart, stable, and integrated Next-generation Home Network (NHN) system capable of supporting more comfortable and convenient life in the future human housing domains, and to find out which institutional tasks are required to activate the related industries. Additionally, this study aims to review a variety of technologies suggested so far in several fields including information and communications, appliance, and building maintenance. This paper analyzes the advantages and disadvantages, acceptance structure and problems of standard technologies and it suggests the political methods and policies to embody them most effectively and integrally in the future. The said certification system is called 'Standardized Certification System for Korean-style Next-generation Home Network Buildings'(abbreviated to K-NHN) as a new system created for the purpose of developing, more effectively, NHN to be introduced in the future.
A Comparison of Signal Processing Techniques in Optical Current Sensor for GIS
Kim, Young-Min ; Park, Jung-Hwan ; Jee, Seung-Wook ; Lee, Kwang-Sik ; Kim, Jung-Bae ; Park, Won-Zoo ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 20, issue 9, 2006, Pages 103~109
DOI : 10.5207/JIEIE.2006.20.9.103
This research is contents about output characteristic of optic current sensor that use faraday effect. optic current sensor used in an experiment is consisted of three parts.(1) Source of light used laser diode of 1310[nm].(2) Sensor section manufactured circularly according to gas insulated switchgear. And
standard single mode optical fiber for communication was installed winding 20 [turn] on sensor section core surroundings of diameter 31 [cm].(3) Electrical signal of PD(Photo detector) is collected using NI company's 16bit DAQ board via terminal block. Collected data analyzed by different three signal processing methods. NI company's
was used to signal processing software. As a result, In signal processing of optic current sensor, we could know that noise greatly more influences the error generation than fluctuation of light intensity. also, 1 class CT(current transformer) manufacture that have error rate less than 1[%] was available by removing these