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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 64, Issue 12 - Dec 2015
Volume 64, Issue 11 - Nov 2015
Volume 64, Issue 10 - Oct 2015
Volume 64, Issue 9 - Sep 2015
Volume 64, Issue 8 - Aug 2015
Volume 64, Issue 7 - Jul 2015
Volume 64, Issue 6 - Jun 2015
Volume 64, Issue 5 - May 2015
Volume 64, Issue 4 - Apr 2015
Volume 64, Issue 3 - Mar 2015
Volume 64, Issue 2 - Feb 2015
Volume 64, Issue 1 - Jan 2015
Selecting the target year
Development of One Day-Ahead Renewable Energy Generation Assessment System in South Korea
Lee, Yeon-Chan ; Lim, Jin-Taek ; Oh, Ung-Jin ; N.Do, Duy-Phuong ; Choi, Jae-Seok ; Kim, Jin-Su ;
The Transactions of The Korean Institute of Electrical Engineers, volume 64, issue 4, 2015, Pages 505~514
DOI : 10.5370/KIEE.2015.64.4.505
This paper proposes a probabilistic generation assessment model of renewable energy generators(REGs) considering uncertainty of resources, mainly focused on Wind Turbine Generator(WTG) and Solar Cell Generator(SCG) which are dispersed widely in South Korea The proposed numerical analysis method assesses the one day-ahead generation by combining equivalent generation characteristics function and probabilistic distribution function of wind speed(WS) and solar radiation(SR) resources. The equivalent generation functions(EGFs) of the wind and solar farms are established by grouping a lot of the farms appropriately centered on Weather Measurement Station(WMS). First, the EGFs are assessed by using regression analysis method based on typical least square method from the recorded actual generation data and historical resources(WS and SR). Second, the generation of the REGs is assessed by adding the one day-ahead resources forecast, announced by WMS, to the EGFs which are formulated as third order degree polynomials using the regression analysis. Third, a Renewable Energy Generation Assessment System(REGAS) including D/B of recorded actual generation data and historical resources is developed using the model and algorithm predicting one day-ahead power output of renewable energy generators.
Standardization of IEC Terminologies Based on a Matrix Classification System
Hwang, Humor ; Kim, Jung-Hoon ; Moon, Bong-Hee ;
The Transactions of The Korean Institute of Electrical Engineers, volume 64, issue 4, 2015, Pages 515~522
DOI : 10.5370/KIEE.2015.64.4.515
Through the correspondence works with IEC in the smart grid fields and power IT fields, we set up the interpretation work procedure and defined the work rule for correspondence by analyzing the work results. In addition, we suggest cases for discussion of terms and definitions in the IEC and analyze them and then propose a matrix classification system for standardization to solve the cases for discussion. The matrix classification system with 3-axes of classification has been applied to newly emerging terminologies followed by smart gird. We drew the usefulness in search of terms in application fields and showed the cases of applying the matrix classification. The IEC Electropedia classification standard is unclear and the classification is mixed with principle, application and product areas. We proposed a new working group in IEC TC1 for research on the matrix classification system and then TC 1 decided to organize a new WG titled in the "IEV structure and supporting tools".
Operation method of Voltage Compensation Devices for power system stability
Ahn, Chang-Han ; Baek, Young-Sik ;
The Transactions of The Korean Institute of Electrical Engineers, volume 64, issue 4, 2015, Pages 523~528
DOI : 10.5370/KIEE.2015.64.4.523
A new algorithm for a coordinative control method is proposed with respect to voltage control and system stabilization of local substations. This is accomplished using control cooperation between a static synchronous compensator (STATCOM) and the existing voltage compensation equipment in the steady state and emergency state of a power system. A real-time system analysis was developed by combining a system analysis program with InTouch, which has primarily been used in factory automation for verification. PSS/E was used for the load flow calculation software, Python for language, Intouch as an HMI program, and MS SQL for the database. To test this system, the system in the vicinity of the Migeum and the Migeum substations was modeled and simulated.
A Study on the Methodology of Determining Proper SOC Operation Range Considering the Economic Characteristics and the Charge and Discharge Voltage Characteristics of BESS
Yoon, Dae-Sik ; Choo, Dae-Hyeok ; Ki, Byung-Kook ; Kim, Joohn-Sheok ; Lee, Byung Ha ; Chae, Woo-Ku ;
The Transactions of The Korean Institute of Electrical Engineers, volume 64, issue 4, 2015, Pages 529~536
DOI : 10.5370/KIEE.2015.64.4.529
With the growing interest of microgrid all over the world, many studies on microgrid operation are being carried out. The battery energy storage system(BESS) is a key equipment for effective operation of the microgrid. In this paper, we analyze the characteristics of the charge and discharge output voltage of the battery and the characteristics of the life-span variation and the investment cost when the state-of-charge (SOC) changes. The formulas to represent the quality of the charge and discharge output voltage of the battery and the economics due to the life-span variation and the investment cost according to DOD(Depth of Discharge) are derived. The methodology of determining the proper operation ranges of the battery SOC with varying the weighting of the quality of its charge and discharge output voltage of the battery and the economics due to its life-span variation and the investment cost is presented using these formulas.
Design and Characteristic Analysis of Linear Oscillating Actuator with Structure
Kim, Hae-Joong ; Lee, Choong-Sung ; Hong, Jung-Pyo ;
The Transactions of The Korean Institute of Electrical Engineers, volume 64, issue 4, 2015, Pages 537~544
DOI : 10.5370/KIEE.2015.64.4.537
This paper provided two types of design method on moving core type LOA and one type of design method on moving coil type LOA, and compared and examined each of its characteristics. In order to conduct parametric design process, voltage equation was used to schematize Lmin/K and L/M map, and the schematized map was used to determine Lmin, K or L, M. In order to meet requirements such as thrust force and input voltage and to satisfy the target values of Lmin, K or L, M, the types and sizes of each type were designed using geometry design process. 2-FEA was conducted for each of the designed model. After examining thrust force based on the location of the mover, Type-1 showed radical change in thrust force as movers moved, and Type-2 and Type-3 showed constant appearance of thrust force. The total volume of the designed LOA model was compared to select the model with highest thrust force density. Also, the weight of the mover for each model was compared in order to select the model that was predicted to have highest mechanical responsiveness and stroke characteristics.
Torque Analysis of Magnetic Spur Gear with Radial Magnetized Permanent Magnets based on Analytical Method
Min, Kyoung-Chul ; Choi, Jang-Young ; Sung, So-Young ; Park, Jong-Won ;
The Transactions of The Korean Institute of Electrical Engineers, volume 64, issue 4, 2015, Pages 545~551
DOI : 10.5370/KIEE.2015.64.4.545
This paper deals with torque analysis of magnetic spur gear with radial magnetized permanent magnets based on analytical method. The analysis is implemented in three parts: First, on the basis of magnetic vector potential and a two-dimensional (2D) polar-coordinate system, the magnetic field solution due to permanent magnet of source gear are obtained. And by using derived magnetic field solutions, the analytical solutions for external magnetic field distribution which affects load gear are obtained. Second, by using coordinate conversion, external magnetic field which is on the primary coordinate system is converted to the secondary coordinate system. Finally, the load gear is reduced to equivalent current densities, and the torque is computed on these currents in the external field of the source magnet. These analytical results are validated by comparing with the 2-D finite element analysis (FEA).
Design and Control Method of Full-bridge DC-DC Converter for Electrolyzer
Lee, Byoung-Seoup ; Yoon, Tae-Min ; Kim, Jong-Hoon ; Lee, Kyo-Beum ;
The Transactions of The Korean Institute of Electrical Engineers, volume 64, issue 4, 2015, Pages 552~559
DOI : 10.5370/KIEE.2015.64.4.552
Hydrogen is commonly used in many industrial field. However, hydrogen should be filled in a high pressure container to use it. Therefore, many researches have been conducted about an electrolyzer. The operating principle of the electrolyzer is that the electrolyzer can separate water molecules into hydrogen and oxygen. To use the electrolyzer, a power conversion system is needed because the current of the electrolyzer increases exponentially depending on the voltage of the electrolyzer. Thus, this paper proposes the power conversion system for the electrolyzer using a full-bridge DC-DC converter topology.
A study on Ar/CF
Magnetized Inductively Coupled Plasma Using Fluid Simulation
Kim, Yun-Gi ; Son, Eui-Jeong ; Wi, Sung-Suk ; Kim, Dong-Hyun ; Lee, Ho-Jun ;
The Transactions of The Korean Institute of Electrical Engineers, volume 64, issue 4, 2015, Pages 560~566
DOI : 10.5370/KIEE.2015.64.4.560
The self-consistent simulation based on the drift-diffusion approximation with anisotropic transport coefficients was performed. The RHCP-wave propagation was observed in MICP and this wave was refracted toward the high-density region. The calculated impedance seen from the antenna terminal shows that resistance component of MICP is a higher than that of ordinary ICP. Because of a higher resistance, the power transfer efficiency was improved to 95%. This property is practically important for large-size, low-pressure plasma sources because high resistance corresponds to high power-transfer efficiency and stable impedance matching characteristics.
Characterization of Linear Microwave Plasma using the Fluid Simulation
Seo, Kwon-Sang ; Han, Moon-Ki ; Kim, Dong-Hyun ; Lee, Ho-Jun ;
The Transactions of The Korean Institute of Electrical Engineers, volume 64, issue 4, 2015, Pages 567~572
DOI : 10.5370/KIEE.2015.64.4.567
Discharge characteristics of linear microwave plasma were investigated by using fluid simulation of 2D axis-symmetry based on finite elements method. The microwave power was 2.45 GHz TEM mode and transmitted through linear antenna. Resistive power and pressure were considered simulation variables and argon was used for working gas. A decrease of electron density along the quartz tube was observed in low power condition but relatively uniform plasmas were generated in chamber by increasing the resistive power. The electron temperature was highly detected near the surface of quartz tube because the electron was heated only dielectric surface. The power transmission efficiency decreased and characteristics of surface plasma were observed in high electron density condition.
Implementation of Digital Signal Processing Board Suitable for a Semi-active Laser Tracking to Detect a Laser Pulse Repetition Frequency and Optimization of a Target Coordinates
Lee, Young-Ju ; Kim, Yong-Pyung ;
The Transactions of The Korean Institute of Electrical Engineers, volume 64, issue 4, 2015, Pages 573~577
DOI : 10.5370/KIEE.2015.64.4.573
In this paper, we propose a signal processing board suitable for a semi-active laser tracking to detect an optical signal generated from the laser target designator by applying an analog trigger signal, the quadrant photodetector and a high speed ADC(analog-digital converter) sampling technique. We improved the stability by applying the averaging method to minimize the measurement error of a gaussian pulse. To evaluate the performances of the proposed methods, we implemented a prototype board and performed experiments. As a result, we implemented a frequency counter with an error 14.9ns in 50ms. PRF error code has a stability of less than 1.5% compared to the NATO standard. Applying the three point averaging method to ADC sampling, the stability of 28% in X-axis and 22% in Y-axis than one point sampling was improved.
Switching Control of Electromagnetic Levitation System based on Jacobian Linearization and Input-Output Feedback Linearization
Jeong, Min-Gil ; Choi, Ho-Lim ;
The Transactions of The Korean Institute of Electrical Engineers, volume 64, issue 4, 2015, Pages 578~585
DOI : 10.5370/KIEE.2015.64.4.578
Electromagnetic levitation system(EMLS) is one of the well known nonlinear systems. Often, it is not easy to control an EMLS due to its high nonlinearity. In this paper, we first apply two linearization method(jacobian and input-output feedback linearization) to design two feedback controllers for an EMLS. Then, by observing the advantages of each controller, we design a switching control algorithm which engage two controllers depending on the position of the steel ball in order to achieve the improved performance over each controller. The validity of our switching control approach is verified via both simulation and actual experimental results.
Force Feedback System of Telepresence Robot for Remote Operation
Hwang, Jung-Uk ; Park, Tae-Hyoung ;
The Transactions of The Korean Institute of Electrical Engineers, volume 64, issue 4, 2015, Pages 586~591
DOI : 10.5370/KIEE.2015.64.4.586
This paper proposes a force feedback system of telepresence robot for remote operation. The ultrasonic sensors attached at the robot detect the obstacles, and generate the force to the operation joystick. In order to consider the network delay, we developed the fuzzy control system using ultrasonic data and robot speed. The method to calculate the force vector from the ultrasonic data is also presented to operate the robot more accurately. The simulation and experimental results are presented to verify the safe and accurate operation of the proposed system.
TSV Fault Detection Technique using Eye Pattern Measurements Based on a Non-Contact Probing Method
Kim, Youngkyu ; Han, Sang-Min ; Ahn, Jin-Ho ;
The Transactions of The Korean Institute of Electrical Engineers, volume 64, issue 4, 2015, Pages 592~597
DOI : 10.5370/KIEE.2015.64.4.592
3D-IC is a novel semiconductor packaging technique stacking dies to improve the performance as well as the overall size. TSV is ideal for 3D-IC because it is convenient for stacking and excellent in electrical characteristics. However, due to high-density and micro-size of TSVs, they should be tested with a non-invasive manner. Thus, we introduce a TSV test method on test prober without a direct contact in this paper. A capacitive coupling effect between a probe tip and TSV is used to discriminate small TSV faults like voids and pin-holes. Through EM simulation, we can verify the size of eye-patterns with various frequencies is good for TSV test tools and non-contact test will be promising.
A Comparison of the Cascading Chebyshev BPF's skirt Characteristic and the Same Order BPF's
Shin, Seung-Sik ;
The Transactions of The Korean Institute of Electrical Engineers, volume 64, issue 4, 2015, Pages 598~604
DOI : 10.5370/KIEE.2015.64.4.598
A Chebyshev filter is well known for having a sharp skirt characteristic and equi-ripple. On the other hand, a Butterworth filter has a smooth skirt characteristic and maximally flat ripple. This paper analyzes the skirt characteristics of the filters with the cascade connection. The paper deals with the Chebyshev BPF, Cascading Chebyshev BPF, Butterworth BPF, Cascading Butterworth*Chebyshev BPF. First of all, the paper designs the prototype analog LPF in order to analyze skirt characteristics of the BPFs. Then the paper does the frequency transformation into the BPFs and tests the BPFs with cascading them. As a result, the skirt characteristics of the Chebyshev BPF was the sharpest and those of the Cascading Chebyshev BPF, Butterworth BPF, Cascading Butterworth*Chebyshev BPF was superior in order. The validity of the paper was confirmed through minute measurements of test results.
A Study on Angle Measurements Using an Optical Fiber
Kim, A-Hee ; Kim, Ji-Sun ; Oh, Han-Byeol ; Kim, Jun-Sik ; Goh, Bong-Jun ; Lee, Eun-Suk ; Jung, Hyon-Chel ; Choi, Ju-Hyeon ; Baek, Jin-Young ; Jun, Jae-Hoon ;
The Transactions of The Korean Institute of Electrical Engineers, volume 64, issue 4, 2015, Pages 605~611
DOI : 10.5370/KIEE.2015.64.4.605
The measurement and analysis of angular change have been studied in many fields. This study developed an angle measurement technique with optical fiber and photodiode. The position and attached angle of photodiode were investigated to find the proper combination of parameter. The results showed that the increased measuring range was achieved when the position of detector was away from the center of rotation. Inverse mathematical model was used to obtain angular changes with an optical fiber. The applications of this study include in optical sensor, joint angle measurement, and sport science.
Analysis of Characteristics on the High-speed SFCL According to Single Line-ground-fault in the Reclosing Operation
Jeong, In-Sung ; Jung, Byung-Ik ; Choi, Hyo-Sang ;
The Transactions of The Korean Institute of Electrical Engineers, volume 64, issue 4, 2015, Pages 612~615
DOI : 10.5370/KIEE.2015.64.4.612
This paper proposed an high-speed superconducting fault current limiter (H-SFCL). The proposed H-SFCL functioned the initial fault current could be covered by the SFCL and the continued fault current after the one-cycle from fault occurrence could be controlled current-limiting-element of the normal conduction. To investigate the operation characteristics of the H-SFCL, a simulation power system was constructed, and a single line-to-ground fault was occurred. As a result, the H-SFCL limited the fault current by more than about 70%, and it was confirmed that the electric power burden was reduced compared to the SFCL that consisted only of superconductors.
Fuzzy Droop Control considering SOC Balancing of BESSs
Han, Seong-Geun ; Yoo, Hyeong-Jun ; Kim, Hak-Man ;
The Transactions of The Korean Institute of Electrical Engineers, volume 64, issue 4, 2015, Pages 616~622
DOI : 10.5370/KIEE.2015.64.4.616
A microgrid which is composed of distributed generation systems, energy storage systems and loads is operated in the grid-connected mode and in the islanded mode. Especially, in the islanded mode, a microgrid should maintain frequency in the allowed range. The frequency is decided by a balance between power supply and power demand. In general, the frequency is controlled by using battery energy storage systems (BESSs) in the microgrid. Especially, droop control is applied to controlling BESSs in the microgrid. Meanwhile, over-charging and deep-discharging of BESS in operation and control cause life-shortening of batteries. In this paper, a fuzzy droop control is proposed to change droop gains adaptively by considering state of charge (SOC) of BESSs to improve the life cycle of the battery. The proposed fuzzy droop control adjusts droop gains based on SOC of BESSs in real time. In other to show the performance of the proposed fuzzy droop control, simulation based on Matlab/Simulink is performed. In addition, comparison of the convention droop control and the proposed fuzzy droop control is also performed.
Analysis of WPT Characteristics by Shielding Materials
Lee, Yu-Kyeong ; Jeong, In-Sung ; Choi, Hyo-Sang ;
The Transactions of The Korean Institute of Electrical Engineers, volume 64, issue 4, 2015, Pages 623~628
DOI : 10.5370/KIEE.2015.64.4.623
In this paper, the shield plate was applied to the wireless power transfer (WPT) system. Then we compared transmission efficiency of WPT system between transmitter and receiver coils. The superconductor coil was applied to transmitter and receiver coils in order to increase the transmission efficiency of WPT. The superconductor coil was more effective to power transmission as its current density was higher than normal conductor coil. Efficiency of WPT between transmitter and receiver coils was changed by a quality of shielding. We used the shielding materials such as glass, iron, steels, aluminum etc. The efficiency of WPT system was depended on the shielding materials of transmitter and receiver coils. As a result, magnetic material such as aluminum, iron reduced the magnetic flux density and the efficiency of WPT. remarkably, but in non-magnetic material such as glass and plastic, the efficiency of WPT was unaffected.
Shape design method for high torque in the flux-weakening range of the IPMSM
Lee, Ki-Doek ; Lee, Ju ;
The Transactions of The Korean Institute of Electrical Engineers, volume 64, issue 4, 2015, Pages 629~633
DOI : 10.5370/KIEE.2015.64.4.629
Analysis of Tram Feeding System according to Train Diagram Change
Kim, Dong-Man ; Chang, Chin-Young ; Kim, Jae-Moon ; Kim, Yang-Su ;
The Transactions of The Korean Institute of Electrical Engineers, volume 64, issue 4, 2015, Pages 634~639
DOI : 10.5370/KIEE.2015.64.4.634
In order to understand phenomenon of the electric railway power feeding system in the construction planning step, analysis of the overall system including electric characteristic of electric railway power feeding system, train running characteristic and power consumption pattern and train operation plan and gradients of railroad and curve radius is required. This paper study the feeder system by analysis of comprehensive system according to train operation plans, line impedance, running characteristic of train, electrical properties of the feeder system. In order to understand phenomenon to the feeder system of tram exactly regarding export of the field railroad preceeding actively recently.
Analysis on Voltage and Cost of Substation with PWM Rectifier in DC Traction Power Supply System
Kim, Joorak ; Park, Kijun ; Park, Chang-Reung ; Choo, Eun-Sang ; Lee, Jun-Young ;
The Transactions of The Korean Institute of Electrical Engineers, volume 64, issue 4, 2015, Pages 640~645
DOI : 10.5370/KIEE.2015.64.4.640
Near surface transit system has should be constructed as installation cost of light rail transit with elevated track. So, distance between two substations is longer than conventional system. The long feeding distance results in severe voltage drop. This paper proposes a PWM rectifier instead of diode rectifier. The PWM rectifier has some advantages. This is able to control output voltage constantly to reduce voltage drop and to use regeneration power without additional inverter. This paper analyse on improved voltage profile and cost of substation with PWM rectifier. The analysis of voltage profile use PSIM, and the installation cost of substation with PWM rectifier is compared to substation with diode rectifier.
A Study for Development of Integrated DC Railway System Analysis Algorithm
Jang, Dong Uk ; Kim, Moo Sun ; Hong, Jae Sung ; Lee, Hansang ;
The Transactions of The Korean Institute of Electrical Engineers, volume 64, issue 4, 2015, Pages 646~652
DOI : 10.5370/KIEE.2015.64.4.646
Increasing needs for rapid driving vehicles during rush hour, there are various researches how to operate or allocate rapid driving vehicles with the existing normal driving vehicles. In the aspect of power system, it should be preceded by an analysis for power equipment capacity. Also, it should be studied whether the added rapid driving vehicles gives a bad effects for stable operation of railway systems or not. In order to derive the results for these analysis processes, this paper suggest a novel analysis algorithm which can implement integrated analysis including rapid and normal driving railway vehicles simultaneously. This algorithm has been verified using Seoul Metro 7 Line data.
Study on the Evaluation of Uncertainty for the Efficiency of 0.75[kW] Class Three Phase Induction Motor
Jun, Hee-Deuk ; Park, Han-Seok ; Kim, Dea-Kyong ; Woo, Kyung-Il ;
The Transactions of The Korean Institute of Electrical Engineers, volume 64, issue 4, 2015, Pages 653~659
DOI : 10.5370/KIEE.2015.64.4.653
In the last few years, the regulations for efficiency grade of the three phase induction motor are internationally being discussed and upgraded for the protection of environment and energy saving. So the efficiency improvement and the reliable test result are essential to determine the premium grade three phase induction motor. While a study on developing the efficiency motor is active, there is little research about the guarantee for efficiency. So in this paper, the dispersion characteristic of the efficiency is studied using uncertainty theory for the three phase induction motor to improve the reliability of efficiency. The values such as input voltage, current, speed, torque were obtained by loss separation method to evaluate the uncertainty. From the result, it was known that the important loss factor could affect the uncertainty is the stray loss.