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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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The Transactions of The Korean Institute of Electrical Engineers
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Journal DOI :
The Korean Institute of Electrical Engineers
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Volume & Issues
Volume 63, Issue 12 - Dec 2014
Volume 63, Issue 11 - Nov 2014
Volume 63, Issue 10 - Oct 2014
Volume 63, Issue 9 - Sep 2014
Volume 63, Issue 8 - Aug 2014
Volume 63, Issue 7 - Jul 2014
Volume 63, Issue 6 - Jun 2014
Volume 63, Issue 5 - May 2014
Volume 63, Issue 4 - Apr 2014
Volume 63, Issue 3 - Mar 2014
Volume 63, Issue 2 - Feb 2014
Volume 63, Issue 1 - Jan 2014
Selecting the target year
Development of Industrial Load Control Algorithm for Factory Energy Management System (F-EMS) under Real Time Pricing Environment
Jeon, Jeong-Pyo ; Jang, Sung-Il ; Kim, Kwang-Ho ;
The Transactions of The Korean Institute of Electrical Engineers, volume 63, issue 12, 2014, Pages 1627~1636
DOI : 10.5370/KIEE.2014.63.12.1627
In real-time electricity price environment, the energy management system can provide the significant advantage to the residential, commercial and industrial customers since it can reduce the electricity charge by controlling the load operation effectively in response to time-varying price. However, the earlier studies for load management mainly focus on the residential and commercial customers except for the industrial customers because most of load operations in industrial sector are intimately related with production schedule. So, it is possible that the inappropriate control of loads in industrial sector causes huge economic loss. In this paper, therefore, we propose load control algorithm for factory energy management system(F-EMS) to achieve not only minimizing the electricity charges but also maintaining production efficiency by considering characteristics of load operation and production schedule. Considering characteristics of load operation and production schedule, the proposed load control algorithm can reflect the various characteristics of specific industrial customer and control their loads within the range that the production efficiency is maintained. Simulation results show that the proposed load control algorithm for F-EMS leads to significant reduction in the electricity charges and peak power in industrial sector.
Commercial Grade Item Dedication of Digital Devices for Safety-related System in Nuclear Power Plant
Hong, Young Hee ; Bae, Byung Hwan ; Park, Jaehyun ;
The Transactions of The Korean Institute of Electrical Engineers, volume 63, issue 12, 2014, Pages 1637~1639
DOI : 10.5370/KIEE.2014.63.12.1637
In the past, the analog protection relays have been widely used for the safety-related systems in the nuclear power plants due to their stability and reliability. Meanwhile, as the high performance digital system has been developed, the digital systems have been adopted in the non-safety systems. However, since the digital systems currently used in the non-safety systems were not developed according to Q-class standard, Commercial Grade Item Dedication (CGID) procedure should be performed in order to apply them to the safety-related system. The purpose of this paper is to describe the CGID procedure including the analysis of the hardware architecture as well as the software embedded in protective relay to apply to the emergency diesel generator in the nuclear power plant. The entire CGID procedure was performed strictly according to the international standard and regulations.
Switching Frequency Reduction Method for Modular Multi-level Converter Utilizing Redundancy Sub-module
Lee, Yoon-Seok ; Yoo, Seung-Hwan ; Choi, Jong-Yun ; Park, Yong-Hee ; Han, Byung-Moon ; Yoon, Young-Doo ;
The Transactions of The Korean Institute of Electrical Engineers, volume 63, issue 12, 2014, Pages 1640~1648
DOI : 10.5370/KIEE.2014.63.12.1640
This paper proposes a switching frequency reduction method for MMC (Modular Multilevel Converter) utilizing redundancy operation of sub-module, which can offer reduction of voltage harmonics and switching loss. The feasibility of proposed method was verified through computer simulations with PSCAD/EMTDC software. Based on simulation analysis, a hardware scaled-model of 10kVA, DC-1000V MMC was designed and manufactured in the lab. Various experiments were conducted to verify the feasibility of proposed method in the actual hardware system. The hardware scaled-model can be effectively utilized for analyzing the performance of MMC according to the modulation scheme and redundancy operation.
MPPT Control of PV System using Improved PO Method
Ko, Jae-Sub ; Chung, Dong-Hwa ;
The Transactions of The Korean Institute of Electrical Engineers, volume 63, issue 12, 2014, Pages 1649~1654
DOI : 10.5370/KIEE.2014.63.12.1649
This paper proposes the method which is improved a performance of PO MPPT control in PV system. The PO method is continually changed voltage toward direction that increases power, and if output power is decreased by changing voltage, a power of the conventional PO method is changed to a power before one step. These operations causes reduce of MPPT performance. Therefore, this paper proposes the MPPT method that can be improved the performance of the conventional PO method. When voltage is changed to direction of reducing power, the method proposed in this paper is changed to the voltage the opposite direction of twice step size. The MPPT performance of proposed method in this paper is compared with conventional PO method and proved the validity of this paper using these results.
The Optimal Design of a Triple-Band Antenna with Additional Arm Resonating Structure for LTE, ISM and WLAN Application
Lee, Seung-Je ; Oh, Seung-Hun ; Lee, Jeong-Hyeok ; Kim, Hyeong-Seok ;
The Transactions of The Korean Institute of Electrical Engineers, volume 63, issue 12, 2014, Pages 1655~1660
DOI : 10.5370/KIEE.2014.63.12.1655
In this paper, we propose a design of a triple-band microstrip circular patch antenna. The proposed antenna generates the triple frequency resonance at 1.85GHz(LTE), 2.45GHz(ISM) and 5.5GHz(WLAN). Firstly, we design the dual-band antenna. The dual-band antenna consist of the circular patch, slits, and the slot. The circular patch and slot are designed for dual frequency of 2.45GHz and 5.5GHz, respectively. And then the dual-band antenna is combined with additional arm-shaped structure for the triple-band characteristic. The arm-shaped structure is operated as the dipole. It is designed for lowest frequency of 1.85GHz. Each part of the antenna unites to a new structure. In order to design the proposed antenna automatically and optimally, APSO algorithm is adopted. During APSO, the mismatch of the proposed antenna is resolved. The optimal designed antenna has an acceptable return loss(-10dB) at each bands(i.e, 1.85GHz, 2.45GHz and 5.5GHz).
Optimal Design of a UWB-MIMO Antenna with a Wide Band Isolation using ES Algorithm
Han, Jun-Hee ; Kim, Hyeong-Seok ;
The Transactions of The Korean Institute of Electrical Engineers, volume 63, issue 12, 2014, Pages 1661~1666
DOI : 10.5370/KIEE.2014.63.12.1661
In this paper, a compact planar ultra wideband (UWB, 3.1~10.6GHz) multiple-input multiple-output (MIMO) antenna is proposed. This antenna consists of two monopole planar UWB antennas and T-shaped stub decoupling between two antennas. The T-shaped stub improve the isolation characteristic at the wide band. The evolution strategy(ES) algorithm is employed to optimized design. As a result, optimized antenna has a return loss less than -10dB and the isolation less than -15dB from 3.1GHz to 10.6GHz. During the optimization process, the antenna gain is enhanced at lower band and the envelope correlation coefficient(ECC) is lower than 0.003.
A Method to Identify the Identification Eye Status for Drowsiness Monitoring System
Lee, Juhyeon ; Yoo, Hyoungsuk ;
The Transactions of The Korean Institute of Electrical Engineers, volume 63, issue 12, 2014, Pages 1667~1670
DOI : 10.5370/KIEE.2014.63.12.1667
This paper describes a method for detecting the pupil region and identification of the eye status for driver drowsiness detection system. This program detects a driver`s face and eyes using viola-jones face detection algorithm and extracts the pupil area by utilizing mean values of each row and column on the eye area. The proposed method uses binary images and the number of black pixels to identify the eye status. Experimental results showed that the accuracy of classification eye status(open/close) was above 90%.
A Frequency-dependent Single Cell Impedance Analysis Chip for Applications to Cancer Cell and Normal Cell Discrimination
Chang, YoonHee ; Kim, Min-Ji ; Cho, Young-Ho ;
The Transactions of The Korean Institute of Electrical Engineers, volume 63, issue 12, 2014, Pages 1671~1674
DOI : 10.5370/KIEE.2014.63.12.1671
This paper presents a frequency-dependent cell impedance analysis chip for use in cancer and normal cell discrimination. The previous cell impedance analysis chips for flowing cells cannot allow enough time for cell-to-electrode contact to monitor frequency-dependent impedance response. Another type of the previous cell impedance analysis chips for the cells clamped by membranes need complex sample control for making stable cell-to-electrode contact. We present a new impedance analysis chip using the microchamber array, on which a PDMS cover is placed to make stable cell-to-electrode contact for the individual cell trapped in each microchamber; thus achieving frequency-dependent single-cell impedance analysis without complex sample control. Compared to the normal cells, the magnitude of NHBE cells is
higher than A549 cells in the frequency range of 95.6 kHz~2MHz and the phase of NHBE is
higher than A549 cells in the frequency range of 4.37 kHz~2MHz, respectively. It is demonstrated experimentally that the impedance analysis chip performs frequency-dependent cell impedance analysis by making stable cell-to-electrode contact with simple sample control; thereby applicable to the normal cell and cancer cell discrimination.
Network Configuration, Time Management, and Data Storage for Urban Earthquake Disaster Preventing System
Choi, Hun ; Youn, Joosang ; Heo, Gyeongyong ;
The Transactions of The Korean Institute of Electrical Engineers, volume 63, issue 12, 2014, Pages 1675~1682
DOI : 10.5370/KIEE.2014.63.12.1675
In this paper, we propose a precise time management and time synchronization based on real-time data storage and transmission scheme in design of seismic data acquisition system for urban earthquake disaster preventing system (UEDPS). It is possible to improve the performance of the existing research results through the proposed methods. To evaluate the performances of the proposed methods, we implemented a prototype system(H/W & S/W) and performed some experiments with real seismic data and test equipment generated data as the input.
Image Processing Based Time-Frequency Domain Reflectometry for Estimating the Fault Location Close to the Applied Signal Point
Jeong, Jong Min ; Lee, Chun Ku ; Yoon, Tae Sung ; Park, Jin Bae ;
The Transactions of The Korean Institute of Electrical Engineers, volume 63, issue 12, 2014, Pages 1683~1689
DOI : 10.5370/KIEE.2014.63.12.1683
In this paper, we propose an image processing based time-frequency domain reflectometry(TFDR) in order to estimate the fault location of a cable. The Wigner-Ville distribution is used for analysis in both the time domain and the frequency domain when the conventional TFDR estimates the fault location in a cable. However, the Winger-Ville distribution is a bi-linear function, and hence the cross-term is occurred. The conventional TFDR cannot estimate the accurate fault location due to the cross-term in case the fault location is close to the position where the reference signal is applied to the cable. The proposed method can reduce the cross-term effectively using binarization and morphological image processing, and can estimate the fault location more accurately using the template matching based cross correlation compared to the conventional TFDR. To prove the performance of the proposed method, the actual experiments are carried out in some cases.
An Analysis for Irregularity of Tropospheric Delay due to Local Weather Change Effects on Network RTK
Han, Younghoon ; Shin, Mi Young ; Ko, Jaeyoung ; Cho, Deuk Jae ;
The Transactions of The Korean Institute of Electrical Engineers, volume 63, issue 12, 2014, Pages 1690~1696
DOI : 10.5370/KIEE.2014.63.12.1690
Network RTK generates spatial corrections by using differenced measurements from reference stations in the network, and the corrections are then provided to a rover. The rover, generally, uses linear interpolation, which assumes that the corrections at each reference station are spatially correlated, to obtain a precise correction of its location. However, an irregularity of the tropospheric delay is a real-world factor that violates this assumption. Tropospheric delay is a result of weather conditions, such as humidity, temperature and pressure, and it can cause spatial decorrelation when there are changes in the local climate. In this paper, we have defined the non-linear characteristics of the tropospheric delay between reference stations or user within a region as the "irregularity of tropospheric delay". Such an irregularity can negatively impact the network RTK performance. Therefore, we analyze the influence of the irregularity of tropospheric delay in network RTK based on meteorological data.
RSSI-Based Indoor Localization Method Using Virtually Overlapped Visible Light
Kim, Dae Young ; Yi, Keon Young ;
The Transactions of The Korean Institute of Electrical Engineers, volume 63, issue 12, 2014, Pages 1697~1703
DOI : 10.5370/KIEE.2014.63.12.1697
In this paper, we propose an indoor RSSI (received signal strength indication)-based localization method that uses virtually overlapped visible light with an indoor LED lighting system. In our system, a photodiode (PD) measures the RSSI from LED lamps that blink in one row or column units. Subsequently, the RSSI is used to obtain the horizontal distances between the LED lamps and the receiver with the predetermined characteristics curve, R-D curve, that represents the relation between the RSSI and the horizontal distances. When the controlled LED lamps blink in one row or column units, the R-D curve at the border of the LED lamps is different because of the weak lighting, which results in the position sensing error of the receiver. The deviation of the optical power of each LED also causes the error. To solve these problems, we propose a method that overlaps the visible light through the numerical operation at the receiver side without any modification of the light source side. Our proposed method has been simulated in a room measuring
considering the effect of the error on the optical power of the LED. The simulation result shows that the proposed method eliminates the error condition with the R-D curve and achieves an average positioning error of 13.4 mm under the error rate 3% of the optical power.
A Performance Study of Multi-Core Processors with Perceptrons
Lee, Jongbok ;
The Transactions of The Korean Institute of Electrical Engineers, volume 63, issue 12, 2014, Pages 1704~1709
DOI : 10.5370/KIEE.2014.63.12.1704
In order to increase the performance of multi-core system processor architectures, the multi-thread branch predictor which speculatively fetches and allocates threads to each core should be highly accurate. In this paper, the perceptron based multi-thread branch predictor is proposed for the multi-core processor architectures. Using SPEC 2000 benchmarks as input, the trace-driven simulation has been performed for the 2 to 16-core architectures employing perceptron multi-thread branch predictor extensively. Its performance is compared with the architecture which utilizes the two-level adaptive multi-thread branch predictor.
TSV Defect Detection Method Using On-Chip Testing Logics
Ahn, Jin-Ho ;
The Transactions of The Korean Institute of Electrical Engineers, volume 63, issue 12, 2014, Pages 1710~1715
DOI : 10.5370/KIEE.2014.63.12.1710
In this paper, we propose a novel on-chip test logic for TSV fault detection in 3-dimensional integrated circuits. The proposed logic called OTT realizes the input signal delay-based TSV test method introduced earlier. OTT only includes one F/F, two MUXs, and some additional logic for signal delay. Thus, it requires small silicon area suitable for TSV testing. Both pre-bond and post-bond TSV tests are able to use OTT for short or open fault as well as small delay fault detection.
A Study on Automation Process Based on WEB for Circuit and PCB EM Analysis
Lee, Jang-Hoon ; Jang, Suk-Hwan ; Jeung, Seung-Il ; Lee, Seung-Yo ;
The Transactions of The Korean Institute of Electrical Engineers, volume 63, issue 12, 2014, Pages 1716~1721
DOI : 10.5370/KIEE.2014.63.12.1716
In this paper, a study on automation method for the circuit/EM (Electro-Magnetic) simulation is carried out to analyze effectively the SI/PI (Signal Integrity/Power Integrity) issues which occur on circuits and/or PCBs (Printed Circuit Boards). For the automation of the circuit/EM simulation, algorithms performing each process of the SI/PI analysis automatically (such as ports setup, circuit definition and SI/PI evaluation) are developed; thereby automation system for the SI/PI analysis is constructed with the algorithms. The automation of the circuit/EM simulation is accomplished in the environment of the C/S (Client/Server) architecture in order to reduce resources such as high cost computers demanded for the SI/PI analysis. The automation method for the SI/PI analyses proposed in this paper reduces effort, time, and cost spent on the environment setup for simulation and the SI/PI analysis process. In addition, the proposed method includes automation of the documenting process, which organizes, records and displays the SI/PI analysis results automatically for users.
Center of Pressure of a Human Body using Force Sensing Resistor
Park, Cheol ; Park, Shinsuk ; Kim, Choong Hyun ;
The Transactions of The Korean Institute of Electrical Engineers, volume 63, issue 12, 2014, Pages 1722~1725
DOI : 10.5370/KIEE.2014.63.12.1722
An experimental investigation of COP(center of pressure) was performed using FSR(force sensing resistor) and force plate. The FSR sensor system is used as effective device to detect the movement of human body in activities of daily living. It has been shown that the FSR provides the trajectories of COP with repeatability and reliability.
The Performance Improvement of Lightning Arrester Leakage Current Measuring Device for GIS
Kim, Won-Gyu ; Kim, Min-Soo ; Baek, Young-Sik ;
The Transactions of The Korean Institute of Electrical Engineers, volume 63, issue 12, 2014, Pages 1726~1731
DOI : 10.5370/KIEE.2014.63.12.1726
This paper shows the developed new lightning arrester LCM (Leakage Current Measuring device) which is important element of GIS (Gas Insulated Switchgear) Preventive & Diagnostic system and verify its performance though strengthened test standards. The existing lightning arrester LCM was modified to solve measuring errors which happened frequently. At first, we explained the principle of measuring leakage current. Through analyzing some problems which the existing LCM have. we got some improvable items. For the performance verification of the improved LCM, we manufactured prototype LCM which is applied some improvable items such as improving LCM circuit, adding protection circuit, optimizing inner structure of LCM and changing ground design. After then we carried out the performance test. Accredited testing laboratory carried out the performance verification test according to performance test criteria and procedure of reliability test standards, IEC-60225, 61000 and 60068 etc. We confirmed the test results which correspond with the performance test criteria. Also, we confirmed the performance of the improved LCM installed & being operated at G Substation through the immunity test against the normal noise and open/close surge etc.
Output Density Increasing Design for Railway Vehicle Traction Motor using Halbach Magnet Array Structure
Lee, Ki-Doek ; Jun, Hyun-Woo ; Lee, Ju ; Lee, Hyung-Woo ;
The Transactions of The Korean Institute of Electrical Engineers, volume 63, issue 12, 2014, Pages 1732~1736
DOI : 10.5370/KIEE.2014.63.12.1732
Generally, traction motors for railway vehicles are inferior to that of electric vehicle in terms of output density. Traction motors for railway vehicles are relatively free of spatial constraints than motors electric vehicles, but in terms of whole system efficiency, increasing output density of traction motor is helpful. In this paper, using Halbach magnet array structure, output density of traction motor for 40kW class tram was elevated. This paper introduce detailed design process of the Halbach magnet array structure applied model, and check the affects on output characteristics by parameters like rotor shape, airgap diameter and pole ratio. Also, electrical output characteristics were compared between typical SPMSM model and Halbach magnet array model, which has same output size.
The Study on Shield Moving ECB with PM for Application of Railway Vehicle
Lee, Chang-Mu ; Han, Kyung-Hee ; Choi, Yu-Young ;
The Transactions of The Korean Institute of Electrical Engineers, volume 63, issue 12, 2014, Pages 1737~1741
DOI : 10.5370/KIEE.2014.63.12.1737
The railway ECB(Eddy Current Brake) is used for high speed vehicle of railway like as TGV, ICE, JR-500 because it has stable braking force at high speed. But it is not effective at low speed and it is difficult to save energy due to the excitation of electro-magnet. Although ECB with permanent magnet is used for roller-coaster, it can not control the braking force without clutch. In this paper, the shield moving ECB with PM is proposed for application of railway vehicle. The angle of shield can be changed for various braking force. It changes the flux amount from PM, then the braking force will be reduced. The brake of 800W is simulated by using the software, "Ansoft Maxwell". The characteristics of braking will be shown by the shapes of magnet, disk and various speeds.
Development of a Steady Arm for the Maximum Speed of 400 km/h
Lee, Kiwon ; Park, Young ; Kwon, Sam-Young ; Cho, Yong Hyeon ; Jeong, Heonsoo ;
The Transactions of The Korean Institute of Electrical Engineers, volume 63, issue 12, 2014, Pages 1742~1746
DOI : 10.5370/KIEE.2014.63.12.1742
In order to develop a overhead catenary system for the maximum speed of 400 km/h on Honam high-speed line, increasing tension of contact wire, changing dropper distributions, reducing a hard point and etc. should be considered. And it is also essential to develop core components taking account of the increased tension. Therefore we developed a new steady arm for the max. speed of 400 km/h in this study. FEM (Finite Elements Method) analysis was performed to ensure the strength of the arm. An oval shape was applied to the arm, so that 25 % of strength was increased and 9 % of weight was decreased. And a type test according to the code KRSA-3012 was performed to ensure the performance. Fatigue test in KRRI (Korea Railroad Research Institute)`s test-bed was also performed to evaluate its performance. Some section of the Honam High-speed line was constructed with the developed steady arm.
A Study on Efficient Interface between Point Machine and Interlocking System for High Speed and Conventional Railroad
Lee, Jae-Ho ; Kang, Shin-Ju ;
The Transactions of The Korean Institute of Electrical Engineers, volume 63, issue 12, 2014, Pages 1747~1751
DOI : 10.5370/KIEE.2014.63.12.1747
Interlocking system along with point machine for efficient route control secures safety of train operation by interchanging information each other. However, various types of interlocking system and point machine operating on bender specific interface bring obstacles to effective maintenance and safety. In this paper, we have investigated on interface methods to suggest standard interface module applicable to various operating system
Economic Assessment of ESS for Peak Load Shaving in the Substation of Urban Railway
Park, Jong-Young ; Shin, Seungkwon ; Kim, Hyungchul ; Jung, Hosung ;
The Transactions of The Korean Institute of Electrical Engineers, volume 63, issue 12, 2014, Pages 1752~1758
DOI : 10.5370/KIEE.2014.63.12.1752
This paper evaluates economic benefits of ESS (Energy Storage System) for peak load shaving in the substation of urban railway. For this purpose, the method to determine capacities of ESS and PCS (Power Conditioning System) for peak load shaving is proposed. Then the economic benefits of those devices are evaluated using net present value method. The proposed methods are applied to actual measurements of loads in the substation of urban railway. The results show that electric power costs can be reduced and the economic benefits of ESS for peak load shaving mainly depends on the price of battery.
Frame Design Considering Exciting Frequency and Driving Characteristic of a Traction Motor for Electric Locomotive
Kim, Chul-Su ; Kim, Jae-Moon ;
The Transactions of The Korean Institute of Electrical Engineers, volume 63, issue 12, 2014, Pages 1759~1763
DOI : 10.5370/KIEE.2014.63.12.1759
In this paper, we were performed a structural analysis and durability analysis for an integral frame with an axle according to development of the electric locomotive traction motor. In terms of the structural stability, as a result of the analysis modeling with coupling conditions of beam element and an alternative element of three-dimensional, the maximum von-Mises stress of the locking screw mounting frame were similar as 50MPa and 51MPa. Also A comparison of the natural frequency and the exciting frequency while driving of the electric locomotive No. 8200, the natural frequency is 627.05Hz~856.9Hz while the exciting frequency is not more than most 30Hz or 553Hz, 1110Hz. Therefore, it is possible to avoid the resonance.