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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
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Journal DOI :
The Korean Institute of IIIuminating and Electrical Installation Engineers
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Volume & Issues
Volume 24, Issue 12 - Dec 2010
Volume 24, Issue 11 - Nov 2010
Volume 24, Issue 10 - Oct 2010
Volume 24, Issue 9 - Sep 2010
Volume 24, Issue 8 - Aug 2010
Volume 24, Issue 7 - Jul 2010
Volume 24, Issue 6 - Jun 2010
Volume 24, Issue 5 - May 2010
Volume 24, Issue 4 - Apr 2010
Volume 24, Issue 3 - Mar 2010
Volume 24, Issue 2 - Feb 2010
Volume 24, Issue 1 - Jan 2010
Selecting the target year
Design of LED Driving Circuit using Voltage Controlled Ring Oscillator and Lighting Controller
Kwon, Ki-Soo ; Suh, Young-Suk ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 24, issue 4, 2010, Pages 1~9
DOI : 10.5207/JIEIE.2010.24.4.001
An LED driving and control circuit has been developed. The LED driver has a new PWM circuit for current control of LED columns with dimming, current and thermal control, and communication functions. The PWM circuit is composed of two ring oscillator and one counter which can be constructed using basic digital logic components. In addition, it has the functions of remote control mode such as ON, OFF, emergency and power saving modes by the serial communication. The PWM generator and control circuit have been designed and fabricated 0.35[
] Magnachip/Hynix digital IC fabrication process. The LED driving and control board using the developed chip is fabricated and tested successfully.
A Study on Phosphor Synthetic and Low Temperature Photoluminescence Spectrum
Kim, Soo-Yong ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 24, issue 4, 2010, Pages 10~16
DOI : 10.5207/JIEIE.2010.24.4.010
In this paper, synthesis here Mn add to Ar injection the state and a vacuum an atomosphere
: Mn, ZnO and
power of 1 : 1 mole ratio mixture. Manufacture a close examination of oxygen a component variation luminescence a specific character reach an in fluence of
: Mn, luminescence spectrum observation also an explanation of Mn site symmetry and at luminescence spectrum reach an influence from low temperature photoluminescence spectrum.
A Study on Location of STATCOM for Improvement of Total Transfer Capability and Analysis of Total Transfer Capability Considering Transient Stability
Lee, Byung-Ha ; Baek, Jung-Myoung ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 24, issue 4, 2010, Pages 17~24
DOI : 10.5207/JIEIE.2010.24.4.017
The power transfer capability has been recently highlighted as a key issue in many utilities with the power system more stressed and heavy loaded. The total transfer capability in the KEPCO power system is determined mainly by the voltage stability limit and many approaches for enhancement of the total transfer capability has been consistently performed. In this paper, a new transfer capability index to locate the STATCOM(Static Synchronous Compensator) effectively for enhancing the total transfer capability from a static voltage stability viewpoint is presented and it is applied to a small scale power system of IEEE 39-bus test system in order to show the effects of this index. In addition, the effect of transient stability as well as voltage stability to the total transfer capability when loads are increased is analyzed using this small scale power system.
A Development of Cipher Device based on Embedded Linux for Serial Communication in SCADA
Lee, Jong-Joo ; Kim, Seog-Joo ; Kang, Dong-Joo ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 24, issue 4, 2010, Pages 25~32
DOI : 10.5207/JIEIE.2010.24.4.025
The Supervisory Control and Data Acquisition Systems (SCADA) system provides monitoring, data gathering, analysis, and control of the equipment used to manage most infrastructure. The SCADA Network is implemented in a various manner for larger utilities, and multiple types of protocol and communication interfaces are used to network the control center to remote sites. The existing SCADA equipment and protocols were designed and implemented with availability and efficiency, and as a result security was not a consideration. So, performance, reliability, flexibility and safety of SCADA systems are robust, while the security of these systems is often weak. This makes some SCADA networks potentially vulnerable to disruption of service, process redirection, or manipulation of operational data that could result in public safety concerns and/or serious disruptions to the infrastructure. To reduce the risks, therefore, there is a need to have a security device such as cipher devices or cryptographic modules for security solutions. In this paper we develop an embedded cipher device for the SCADA equipment. This paper presents a cipher device designed to improve the security of its networks, especially in the serial communication.
Development of Self Tuning and Adaptive Fuzzy Controller to control of Induction Motor
Ko, Jae-Sub ; Choi, Jung-Sik ; Chung, Dong-Hwa ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 24, issue 4, 2010, Pages 33~42
DOI : 10.5207/JIEIE.2010.24.4.033
The induction motor drive applied to field oriented control is widely used in industry applications. However, it is deceased performance and authenticity by saturation, temperature changing, disturbance and parameters changing because modeling of induction motor is nonlinear and complex. In order to control variable speed operation, conventional PI-like controllers are commonly used. These controllers provide limited good performance over a wide range of operation, even under ideal field oriented conditions. This paper proposes self tuning PI controller based on fuzzy-neural network(FNN)-PI controller that is implemented using fuzzy control, neural network, and adaptive fuzzy controller(AFC). Also, this paper proposes estimation of speed using ANN. The proposed control algorithm is applied to induction motor drive system using FNN-PI, AFC and ANN controller. Also, this paper proposes the anlysis results to verify the effectiveness of controller.
Analysis for Thermal Distribution of Low-voltage Condenser by the Variance of Voltage & Frequency
Kim, Jong-Gyeum ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 24, issue 4, 2010, Pages 43~49
DOI : 10.5207/JIEIE.2010.24.4.043
Power capacitor has been used to compensate for the low power factor of inductive load and to reduce harmonics generated by the power conversion device with reactor. The increase of voltage and current and thermal generation are extremely hard on the life of condenser. Current will be increased, provided that voltage and frequency of condenser increase also. The increase of voltage and frequency justly extends thermal generation. Both act on insulation stress and can afford to premature fault In this paper, we measured thermal distribution of condenser with infrared rays camera in case of variance of voltage and frequency. We were assured that the increase of voltage and frequency produces high heat and exceedingly shortens the life of condenser.
A SCADA Testbed Implementation Architecture for Security Assessment
Lee, Jong-Joo ; Kim, Seog-Joo ; Kang, Dong-Joo ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 24, issue 4, 2010, Pages 50~56
DOI : 10.5207/JIEIE.2010.24.4.050
Supervisory Control and Data Acquisition Systems (SCADAs) is real-time monitor and control systems. SCADA systems are used to monitor or control chemical and transportation processes, in municipal water supply systems, electric power generation, transmission and distribution, gas and oil pipelines, and other distributed processes. SCADA refers to a large-scale distributed system. The supervisory control system is placed on top of a real time control system to control external processes. Emerging security technologies and security devices are decreasing the vulnerability of the power system against cyber threats. Dealing with these threats and analyzing vulnerabilities is an important task for equipment such as RTU, IED and FEP. To reduce such risks, we develop such a SCADA testbed. This paper presents the development of a testbed designed to assess the vulnerabilities SCADA networks(including serial communication).
A Study on the Terrestrial DTV Channel Model
Lee, Seung-Youn ; Na, Chae-Dong ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 24, issue 4, 2010, Pages 57~65
DOI : 10.5207/JIEIE.2010.24.4.057
In this paper we proposed channel models for terrestrial ATSC (Advanced Television Systems Committee) DTV (Digital Television) system in South Korea. For the purpose of this model, we research on propagation model involved in terrestrial DTV system and analyze out field test data of terrestrial DTV broadcasting carried out in korean Broadcasting System. Using the measured values of received field strength, newly proposed Path-loss models have more correctly than that of conventional Path-loss models. This models can be utilized usefully for the efficient ATSC DTV system implementation requiring accurate link-budget calculation
Electrical Conduction Mechanism of AZO Thin Film and Photo-Electric Conversion Efficiency of Film-Typed Dye Sensitized Solar Cell
Kwak, Dong-Joo ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 24, issue 4, 2010, Pages 66~72
DOI : 10.5207/JIEIE.2010.24.4.066
In this paper, AZO thin film was deposited on polyethylene terephthalate(PET) substrate by r. f. magnetron sputtering method from a ZnO target mixed with 2[wt%] Al2O3. The flexible film-typed dye sensitized solar cell(F-DSC) was fabricated and photo-electric conversion efficiency was investigated. The results showed that the minimum resistivity and the maximum deposition rate of AZO conducting film were recorded as
and 25.5[nm/min], respectively at r.f. power of 220[W]. From the analysis of XPS data an improvement of electrical resistivity or an increase in carrier concentration with increasing sputtering power may be related to the generation of lattice imperfections as a result of increasing component ratio of O1s/Zn2p, which generates donor carriers or active growth of crystalline grain. The photo-electric conversion efficiency of F-DSC with AZO conducting electrode was over 2.79[%], which was comparable as that with commercially available ITO electrode.
Computation of the Critical Lengths of the Vertical Grounding Electrode in Multi-Layered Soil Structures
Kim, Ki-Bok ; Joe, Jeong-Hyeon ; Lee, Bok-Hee ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 24, issue 4, 2010, Pages 73~80
DOI : 10.5207/JIEIE.2010.24.4.073
The grounding impedance is not lowered by expanding the dimension of the grounding electrode, and the length of grounding electrode which shows the minimum value of the grounding impedance for each condition of frequency and soil characteristics is existent, and it is defined as Critical Length. In this paper, a new distributed parameter circuit model considering the condition of the multi-layered soil structures was proposed, and the grounding impedance and critical length of the vertical grounding electrode were analyzed by using the newly proposed simulation model and the MATLAB program. As a consequence, it was found that the effect of the soil structure on the frequency-dependent grounding impedance and critical length of the vertical grounding electrode is significant. It is desirable to consider the soil structure in optimal design of the grounding system.
High Efficiency Resonant Asymmetrical Half-Bridge Flyback Converter
Jeong, Gang-Youl ; Yoo, Doo-Hee ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 24, issue 4, 2010, Pages 81~94
DOI : 10.5207/JIEIE.2010.24.4.081
This paper presents a high efficiency resonant asymmetrical half-bridge flyback converter. The primary half-bridge circuit of the converter operates by a soft-switching type using the asymmetrical pulse-width modulation (PWM) method with the resonant capacitance and transformer leakage inductance. The secondary flyback circuit of the proposed converter utilizes a synchronous rectifier, which operates by a new voltage-driven method with a simple drive circuit. Thus the proposed converter improves the total efficiency. This paper explains the operational principle of the proposed converter by each mode and shows the converter design consideration and a design example for the prototype converter, respectively. After that, the proposed simple driving technique of the synchronous rectifier by a voltage-driven method is explained, briefly. The designed prototype converter has wide input voltage (AC
Empirical Approach to Price Modeling in Electricity Market based on Stochastic Process
Kang, Dong-Joo ; Kim, Bal-Ho H. ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 24, issue 4, 2010, Pages 95~102
DOI : 10.5207/JIEIE.2010.24.4.095
As the electric power industry is evolving into competitive market scheme, a new paradigm is required for the operation of market. Traditional dispatch algorithm was built based on the optimization model with an objective function and multiple constraints. Commercial market simulator followed the concept of the microeconomic model used in the dispatch algorithm, which is called as analytic method. On analytic method it is prerequisite to procure the exact data for the simulation. It is not easy anymore for each market participant to access to other participants` financial information while it used to be easy for monopoly decision maker to know all the information needed for the optimal operation. Considering the changing situation, it is required to introduce a new method for estimating the market price. This paper proposes an empirical method based on stochastic processes expected to build a capacity planning and long term contracts.
Breakdown Characteristics of Soils Caused by Impulse Currents
Lee, Bok-Hee ; Lee, Kang-Soo ; Kim, Hoe-Gu ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 24, issue 4, 2010, Pages 103~109
DOI : 10.5207/JIEIE.2010.24.4.103
In this paper, breakdown characteristics of soil in a coaxial cylindrical electrode system stressed by impulse currents were experimentally investigated. The breakdown voltage and current waveforms for 4 types of soils were measured, and the threshold electric field intensity, the time-lag to breakdown and the voltage-current (V-I) curves were analyzed and discussed. As a result, the breakdown voltage and current waveforms are strongly dependent on the grain size of soil, and the voltage and current waveforms for gravel and sand differ from those for silt and loess. The threshold electric field intensity Ec is increased in the order of gravel, sand, loess and silt. The V-I curves for all test samples show a `cross-closed loop` of
-shape. Also, the time-lag to breakdown for gravel and sand are longer than those for silt and loess. It is expected that the results presented in this paper will provide useful information on the design of improving transient performance of a grounding electrode system subjected to lightning current considering the soil ionization.
Electrical and Optical Properties of the GZO Transparent Conducting Layer Prepared by Magnetron Sputtering Technique
No, Im-Jun ; Kim, Sung-Hyun ; Shin, Paik-Kyun ; Lee, Kyung-Il ; Kim, Sun-Min ; Cho, Jin-Woo ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 24, issue 4, 2010, Pages 110~115
DOI : 10.5207/JIEIE.2010.24.4.110
Transparent conducting gallium-doped zinc oxide (GZO) thin films which were deposited on Corning glass substrate using an Gun-type rf magnetron sputtering deposition technology. The GZO thin films were fabricated with an GZO ceramic target (Zn : 97[wt%],
: 3[wt%]). The GZO thin films were deposited by varying the growth conditions such as the substrate temperature, oxygen pressure. Among the GZO thin films fabricated in this study, the one formed at conditions of the substrate temperature of 200[
], Ar flow rate of 50[sccm],
flow rate of 5[sccm], rf power of 80[W] and working pressure of 5[mtorr] showed the best properties of an electrical resistivity of
, a carrier concentration of
, and a carrier mobility of 31.77[
], which indicates that it could be used as a transparent electrode for thin film transistor and flat panel display applications.
Development and Actual Application of Governor Program to Nuclear Steam Turbine
Choi, In-Kyu ; Kim, Jong-An ; Park, Doo-Yong ; Woo, Joo-Hee ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 24, issue 4, 2010, Pages 116~122
DOI : 10.5207/JIEIE.2010.24.4.116
This paper describes the up-grade of the turbine governor for steam turbine due to its poor operation from long time use. The analog type governor of the unit 1 in Kori nuclear power plant in Korea was removed and the new digital type turbine governor was developed and installed. The procedure for the actual application, site adaptability test using dynamic simulator and the result of actual operation are described here. And the program for nuclear steam turbine is suggested here.
Development of Electric Safety Monitoring System and Cabinet Panel for Traditional Markets
Kim, Gi-Hyun ; Lee, Sang-Ick ; Shin, Seong-Su ; Bae, Suk-Myong ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 24, issue 4, 2010, Pages 123~128
DOI : 10.5207/JIEIE.2010.24.4.123
In this paper, in order to reduce the electric disaster damage which is caused by with electric equipment of traditional markets, we developed cabinet panel and the electric safety monitoring system which is able to monitor the electrical equipments condition(over current, leakage, arc, WH, electrical fire factor etc.) at traditional markets. We constructed Test-bed for testing reliability of electric safety monitoring system and the actual condition investigation about electrical equipment of traditional market. This paper will be used with the data for an actual demonstration project after reinforcing problems which are occurred to operation of traditional market actual loads.
Economic Analysis and Energy Saving Evaluation for Smart Grid System of Hospital Building
Hong, Won-Pyo ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 24, issue 4, 2010, Pages 129~139
DOI : 10.5207/JIEIE.2010.24.4.129
This paper presents a basic energy performance data of microturbine, renewable Energy(BIPV and Solar Collector System) and a hybrid energy system(geothermal system and microturbine) installed in hospital building. The efficiency of solar collector and BIPV system was 30[%], 10[%] individually, and lower than micro turbines. Finally, in energy performance aspect, microturbine and geothermal source heat pump system were a high-efficiency system in hospital building. It is confirmed hybrid energy systems also show the most powerful alternative energy system for green hospital building from the simulation results.
Fabrication and Physical Properties of ZrO
Park, Jae-Sung ; Park, Ju-Tae ; Park, Jung-Rang ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 24, issue 4, 2010, Pages 140~148
DOI : 10.5207/JIEIE.2010.24.4.140
The effects of the addition of either monoclinic
on the physical properties and electrical conductivity of
were investigated. The addition of
(t) increased sintered density of
. The Vickers hardness also increased as addition of
(t) increased going through a maximum at 20[wt%] and the hardness of the specimens was found to be dependent on the sintered density. The addition of
(t) improved the hardness of
systems and the
(m) addition showed the better effect on the thermal shock property of
systems than that of the
(t) addition. Above 15[wt%] addition of
(t), the electrical conductivity is gradually increased with increasing applied voltage but not effects by addition of
A Study on Selection of Cleaning Period and Pollution Analysis of Insulators in Tunnel
Kim, Young-Seok ; Shong, Kil-Mok ; Choi, Myeong-Il ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 24, issue 4, 2010, Pages 149~155
DOI : 10.5207/JIEIE.2010.24.4.149
This paper was carried out to estimate pollution levels of various insulators in tunnel and establish cleaning period in each tunnel section. We estimate pollution level that is attached to insulators in environmental pollution area, industrial area, salt damage area. These results that the pollution quantity and conductivity were increased by pollution accumulation period. However, the conductivity showed each other big difference in each tunnel. In particular, the conductivity showed big in environmental pollution(tunnel A) and salt damage(tunnel C) area, It is considered to prevent accident that manage establishing periodic state of cleaning plan. Also, the Grease that spread on the insulator surface in existing is considered that it can prevent accident for long-term by restrain use.
Study on Comparison Between a Toroidal SRM and a Conventional SRM
Kim, Jae-Hyuck ; Yang, Hyong-Yeol ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 24, issue 4, 2010, Pages 156~165
DOI : 10.5207/JIEIE.2010.24.4.156
This paper discusses comparison between a CSRM(conventional SRM) and a TSRM(toroidal SRM). Unlike the CSRM, the TSRM has its windings mounted around the stator york instead of the stator pole. Therefore, the TSRM has many different properties in terms of the structure as well as the waveform of phase currents, phase voltages, back-EMF, flux linkages, etc. This paper presents the theoretical comparison between the TSRM and the CSRM followed by simulation results.
Development of Improved P&O Algorithm of PV System Considering Insolation variation
Choi, Jung-Sik ; Ko, Jae-Sub ; Chung, Dong-Hwa ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 24, issue 4, 2010, Pages 166~176
DOI : 10.5207/JIEIE.2010.24.4.166
The output characteristics of photovoltaic(PV) arrays are nonlinear and are affected by the temperature and solar insolation of cells. Maximum power point tracking(MPPT) methods are used to maximize PV array output power by tracking maximum power point(MPP) continuously. To increase the output efficiency of PV system, it is important to have more efficient MPPT. This paper proposes a novel maximum power point tracking(MPPT) control algorithm considering insolation to improve efficiency of PV system. The proposed algorithm is composed perturb and observe(P&O) method and constant voltage(CV) method. The proposed method is simulated under varying operating conditions. The effectiveness of these different MPPT methods is investigated thoroughly by PSIM simulation. The simulation results show that this proposed method provides better performance than conventional methods at a variable insolation without self-excited vibration of the power. By the simulation results, the validity of the proposed HB method is proved.
The Electric Field Analysis of 2[MVA] Mold Transformer Considering the Void Effect in the Insulating Material
Kim, Chang-Eob ; Jeon, Mun-Ho ; Lee, Suk-Won ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 24, issue 4, 2010, Pages 177~184
DOI : 10.5207/JIEIE.2010.24.4.177
This paper presents the electric field analysis for 2[MVA] mold transformer using finite element method. The electric field was calculated for the voltage applied to the mold transformer without voids in the insulating material. Then, it was analysed the maximum electric field when the voids was in the insulating materials. And the starting voltage of partial discharge was predicted due to the voids. The effects of voids in epoxy resin on the electric field were investigated for different sizes, shapes, positions and arrangements of voids.
Sensorless Control for Switched Reluctance Motor by Comparing Two Consecutive Switch-on times
Yang, Hyong-Yeol ; Kim, Jae-Hyuck ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 24, issue 4, 2010, Pages 185~191
DOI : 10.5207/JIEIE.2010.24.4.185
This paper describes a new position sensorless control for the switched reluctance motor (SRM) by monitoring the rate of change of current with respect to the inductance variation. Two consecutive switch-on times in hysteresis current control are compared to calculate the rate of change of current and hence to estimate the rotor position and speed. The proposed sensorless control algorithm is simple to implement as it does not depend on extensive computation or additional hardware. Simulation and experimental results are presented to demonstrate the feasibility of the proposed sensorless control method.