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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 29, Issue 12 - Dec 2015
Volume 29, Issue 11 - Nov 2015
Volume 29, Issue 10 - Oct 2015
Volume 29, Issue 9 - Sep 2015
Volume 29, Issue 8 - Aug 2015
Volume 29, Issue 7 - Jul 2015
Volume 29, Issue 6 - Jun 2015
Volume 29, Issue 5 - May 2015
Volume 29, Issue 4 - Apr 2015
Volume 29, Issue 3 - Mar 2015
Volume 29, Issue 2 - Feb 2015
Volume 29, Issue 1 - Jan 2015
Selecting the target year
Design of LED Lighting System using Bluetooth Wireless Communcation
Kim, Hye Myeong ; Yang, Woo Seok ; Cho, Young Seek ; Park, Dae Hee ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 29, issue 2, 2015, Pages 1~7
DOI : 10.5207/JIEIE.2015.29.2.001
The Light Emitting Diode(LED) lighting control system proposed in this thesis is made up of a sensor module, a microcontroller, Bluetooth wireless communication, LED Driver, and LED downlight. The sensor module, comprised of an infrared sensor, an illumination sensor, and a temperature sensor, was designed to one Printed Circuit board(PCB). The system is able to identify the environment information collected by the sensor, and make it possible to control lighting automatically and manually through sensors. In addition, depending on users' conditions, a color temperature can be controlled. CS-1000, a spectroradiometer, was employed to measure the changing values of a color temperature in 8 steps. According to a test, it was found that it was possible to change a color temperature from 3187K of Warm White LED to 5598K of Cool White LED. The Bluetooth based wireless communication technique makes it possible to control more lighting devices than other wireless communication techniques does.
A Dimming Method for the UHD Broadcast LED Lighting
Shin, Dong-Seok ; Park, Chong-Yeun ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 29, issue 2, 2015, Pages 8~18
DOI : 10.5207/JIEIE.2015.29.2.008
This paper proposes a dimming method and a hybrid LED driving circuit suitable for the ultra high definition (UHD) broadcasting. There are major two problems during the dimming control for traditional LED broadcast lightings; one is a flicker that occurred when camera filming to these lightings, and the other is that linear control is impossible for LED luminous intensity under 10% due to LED electrical characteristics. The proposed dimming method and the driving circuit are designed to solve two problems simultaneously. For high level dimming control region from 10 to 100%, the analog control method was applied to the switching regulator constructed by MOSFET operated in the saturation region. For low level dimming control region under 10%, the fast PWM control method with the linear regulator constructed by MOSFET in the ohmic region was used. We verified experimentally that the dimming method is able to control the luminous intensity linearly from 1 to 100% and the flicker disappears on images taken by the charge coupled device (CCD) and the complementary metal oxide semiconductor (CMOS) cameras. Therefore, the proposed method is suitable for the UHD broadcasting.
A Study of the High Voltage Power Supply using a Sixfold Voltage-Multiplying Rectifier
Ahn, Tae-Young ; Gil, Yongl-Man ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 29, issue 2, 2015, Pages 19~26
DOI : 10.5207/JIEIE.2015.29.2.019
This paper presents design, fabrication, and performance evaluation of a high voltage power supply for Carbon Nano Tube-based planar light sources. The proposed power supply employs an LLC resonant half-bridge converter and a sixfold voltage-multiplying rectifier. Steady-state characteristics of the voltage-multiplying rectifier are analyzed and used to derive the input-to-output voltage conversion ratio of the power supply. The input-to-output frequency response characteristics of the LLC tank circuit are analyzed and utilized in designing a proto-type power supply which produces a 15 KV output using a 400 V input source. The high-voltage transformer is fabricated using a sectional bobbin structure with an epoxy impregnation, in order to provide sufficient insulation for high voltage operations. The performance of the proposed power supply is confirmed with stable and reliable operations at the 15 KV output from no load to nominal load conditions. The proposed power supply is well suited as an electric ballast required stable operations of Carbon Nano Tube-based planar light sources.
ANN-based Maximum Power Point Tracking of PV System using Fuzzy Controller
Ko, Jae-Sub ; Chung, Dong-Hwa ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 29, issue 2, 2015, Pages 27~32
DOI : 10.5207/JIEIE.2015.29.2.027
A maximum power point tracking (MPPT) algorithm using fuzzy controller was considered. MPPT method was implemented based on the voltage and reference PV voltage value was obtained from Artificial Neural Network (ANN)-model of PV modules. Therefore, measuring only the PV module voltage is adequate for MPPT operation. Fuzzy controller is used to directly control dc-dc buck converter. The simulation results have been used to verify the effectiveness of the algorithm. The proposed method is compared with conventional PO(perturbation & observation), IC(Incremental Conductance) method. The nonlinearity and adaptiveness of fuzzy controller provided good performance under parameter variations such as solar irradiation.
Load Balancing Technique to Release Multiple Overloading of Distribution Feeders using Minimum Spanning Tree
Oh, Seong-Hyeon ; Lee, Han-Seong ; Kim, Young-Kook ; Lim, Seong-Il ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 29, issue 2, 2015, Pages 33~39
DOI : 10.5207/JIEIE.2015.29.2.033
Power supplying capacity of the distribution feeder should be maintained within thermal capacity of the wire. This paper presents the minimum spanning tree based load balancing technique to release multiple overloading of distribution feeders. In order to minimize number of involved backup feeders, Dijkstra and Prim algorithm are adopted to construct minimum spanning tree. Simulation testing result based on part of KEPCO's commercial distribution systems shows effectiveness of proposed scheme.
Control of a Three-Phase Voltage Source Inverter using Model Predictive Control of Laguerre Functions
Cho, Uk-Rae ; Cha, Wang-Cheol ; Park, Joung-Ho ; Shin, Ho-Jeon ; Kim, Jae-Cheol ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 29, issue 2, 2015, Pages 40~46
DOI : 10.5207/JIEIE.2015.29.2.040
This paper presents a method of controlling a three-phase VSI (Voltage Source Inverter) using MPC (Model Predictive Control) designed using Laguerre functions. It also provides a model of the three-phase VSI and its resistive-inductive load and then an overview of MPC design using Laguerre functions. The biggest challenge in using MPC is the high number of computations involved, which makes online implementation difficult. On the other hand, the LMPC (Laguerre Model Predictive Control) reduces the number of computations made and so online implementation becomes possible where traditional MPC would be unteneble. The simulation results from MATLAB are also provided.
Analysis of Surge in Distribution System and ESS due to Direct Lightning in Distribution System with ESS using EMTP
Seo, Hun-Chul ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 29, issue 2, 2015, Pages 47~53
DOI : 10.5207/JIEIE.2015.29.2.047
The study concerning about the grid connection of the large-capacity energy storage system(ESS) is increasing. However, the transient study such as lightning or switching surge necessarily occurred at power system with ESS has been hardly performed. Therefore, this paper performs the analysis of lightning surge in distribution system with ESS using electromagnetic transient program(EMTP). The battery model in Matlab/Simulink is modeled by EMTP, which is the specialized software for power system transient study. Also, the bi-directional power electronics for interconnection of the battery and distribution system are modeled by EMTP. When the lightning is occurred at interconnection point of ESS, this paper simulates the existence of ESS and operation conditions of ESS and analyzes the surge in distribution system and ESS according to the various conditions.
Control of the Neutral Leg in Three-Phase Four-Wire Inverter Using Proportional-Resonant Controller
Han, Jungho ; Song, Joongho ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 29, issue 2, 2015, Pages 54~61
DOI : 10.5207/JIEIE.2015.29.2.054
In 3-phase 4-wire inverter, the unbalanced loads cause to increase the neutral current which brings the voltage deviation between the split dc-link capacitors to be larger. In order to solve this problem, a neutral leg is provided additively to the ordinary inverter circuit and the associated control methods are devised. This paper proposes a new neutral-leg controller based on a PR controller and shows relatively good performance even under unbalanced linear loads and nonlinear loads. The proposed control strategy illustrates its effectiveness under the various operating conditions through simulation works.
A Study on the Active EMI Filter for LED Driver
Lee, Dong-Ho ; Choi, Min-Whan ; Park, Chong-Yeun ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 29, issue 2, 2015, Pages 62~68
DOI : 10.5207/JIEIE.2015.29.2.062
Recently, LED is being used as various applications such as home lightings, work lightings and so on. EMI noise generated from LED driver have become a problem according to increase the use of LED. In this paper, Active EMI filter composed active and passive components is discribed as a method of solving a problem of EMI. The proposed filter is applied to the 160W LED load to verify performance experimentally. To compare the performance, We did an experiment using the proposed filter and the passive filter on the same 160W LED load and Driver System. As a result, The proposed Active EMI filter attenuated Conduction EMI noise better than any existing passive filter.
Load current and Temperature measurement system for Measuring the Degradation of Power cable
Park, Yong-Kyu ; Cho, Young-Seek ; Lee, Kwan-Woo ; Um, Kee-Hong ; Park, Dae-Hee ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 29, issue 2, 2015, Pages 69~74
DOI : 10.5207/JIEIE.2015.29.2.069
Recently, there has been a surge in interest in equipment diagnosis and monitoring technology from the perspective of providing quality electricity in terms of reliability and safety. In order to meet the electrical demands of consumers, reliability of power supply needs to be maintained. For this purpose, a monitoring system for power cable is very important. Since real-time measuring equipment has many advantages, it is highly applicable. By measuring the load current and the surface temperature of power cables, we have monitored and identified the deterioration phenomena of power cables in operation. Since direct measurement of the cable conductor temperature is not easy, we have measured the surface temperature instead, and converted that temperature to obtain the conductor temperature of the cables. In addition, we have designed a system to detect the deterioration processes of the power cables in operation.
A Study on the Reliability Analysis in LVDC Distribution System Considering Layout
Kim, Chung-Mo ; No, Chul-Ho ; Han, Joon ; Oh, Yun-Sik ; Kim, Hyun-Soo ; Baek, In-Ho ; Kim, Chul-Hwan ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 29, issue 2, 2015, Pages 75~81
DOI : 10.5207/JIEIE.2015.29.2.075
At the end of the 19th century, Edison's DC power system and Tesla's AC power system was debated in power market. Finally, AC system became the primary system of the power market because both step-up and step-down of voltage by using transformer and long-distance power transmission are easily possible. However, nowadays the power market takes some action for introducing DC system. Both domestic and foreign researchers are conducting the study on the DC system as well. Some researchers have conducted the studies on power quality and economic evaluation of the DC distribution system but DC distribution system is still controversial in terms of the effectiveness and reliability. In this paper, we calculate the reliability indices of the Low Voltage Direct Current(LVDC) distribution system considering arrangement of power electronics, layout of the distribution system, and distance between load points.
Study on the High Efficiency Bi-directional DC/DC Converter Topology Using Multi-Phase Interleaved Method
Choi, Jung-Sik ; Park, Byung-Chul ; Chung, Dong-Hwa ; Oh, Seung-Yeol ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 29, issue 2, 2015, Pages 82~90
DOI : 10.5207/JIEIE.2015.29.2.082
This paper proposes an efficient bi-directional DC/DC converter topology using multi-phase interleaved method for power storage system. The proposed converter topology is used for a power storage system using a vanadium redox flow battery(VRFB) and is configured to enable bidirectional power flow for charging and discharging of VRFB. Proposed DC/DC converter of the 4 leg method is reduced to 1/4 times the rating of the reactor and the power semiconductor device so can be reduce the system size. Also, proposed topology is obtained the effect of four times the switching frequency as compared to the conventional converter in each leg with a 90 degree phase shift 4 leg method. This can suppress the reduction of the life of the secondary battery because it is possible to reduce the current ripple in accordance with the charging and discharging of VRFB and may increase the efficiency of the entire system. In this paper, it proposed bidirectional high-efficiency DC/DC converter topology Using multi-phase interleaved method and proved the validity through simulations and experiments.
Judgement of the need for Over-Voltage Control of the Low-Voltage Electrical Installations
Lee, Ju-Cheol ; Kim, Jae-Chul ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 29, issue 2, 2015, Pages 91~96
DOI : 10.5207/JIEIE.2015.29.2.091
There are provision for risk analysis in IEC standards. It is to determine the need for installation of a surge protection device (SPD) in order to protect the low-voltage electrical installations from overvoltages caused by atmospheric phenomena and the like. However, scattered many related standards, the lack of details are not easy to apply it in the field. We investigated the relevant domestic and international standards for applies to the international standards in domestic. And we proposed the flow chart for determining the need for protection of the low-voltage electrical installations from overvoltage due to atmospheric phenomena and it set the appling target facility.
A Study on the Application of DC HTS cable systems to enhance power transfer limits of a grid-connected offshore wind farm
Hur, Jin ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 29, issue 2, 2015, Pages 97~103
DOI : 10.5207/JIEIE.2015.29.2.097
This paper introduces two on-going projects for DC high temperature superconducting (HTS) cable systems in South Korea. This study proposes the application of DC HTS cable systems to enhance power transfer limits of a grid-connected offshore wind farm. In order to develop the superconducting DC transmission system model based on HTS power cables, the maximum transfer limits from offshore wind farm are estimated and the system marginal price (SMP) calculated through a Two-Step Power Transfer (TSPT) model based on PV analysis and DC-optimal power flow. The proposed TSPT model will be applied to 2022 KEPCO systems with offshore wind farms.
Development of Frequency Dependent Equivalent using Genetic Algorithm and it's Application for Electromagnetic Transient Analysis of Practical Power System Model
Choi, Sun-Young ; Park, Seung-Yub ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 29, issue 2, 2015, Pages 104~112
DOI : 10.5207/JIEIE.2015.29.2.104
This paper deals with an methodology for acquiring optimal order of rational function model in FDNE(frequency dependent network equivalents) with GA(genetic Algorithm). In order to analyze the modern power system with huge complexity, an practical and efficient equivalent model is needed which represents the system's characteristics of transient phenomenon. this paper shows developing a z domain rational function model which have the resultant coefficient from proposed GA simulation. To demonstrate this methodology, some simulations are performed with practical power system of NZ which applied with fault condition and nonlinear converter load.