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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
Journal Basic Information
Journal DOI :
The Korean Institute of Electrical Engineers
Editor in Chief :
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
A Study on Methodology for Automated Contingency and Remedial Action Analysis based on Practical Approach: Development of Automated Scheduled Outage Analysis Tool
Song, Jiyoung ; Ko, Baekkyung ; Shin, Jeonghoon ; Han, Sangwook ; Nam, Suchul ; Lee, Jaegul ; Kim, Taekyun ;
The Transactions of The Korean Institute of Electrical Engineers, volume 63, issue 9, 2014, Pages 1171~1179
DOI : 10.5370/KIEE.2014.63.9.1171
ISO(Independent System Operator) or TSO(Transmission System Operator) use power system analysis program to simulate contingency analysis and remedial actions to operate power system stably. Generally, power system analysis program provides automated analysis functions(or modules) to deal with wide area power system. However, because of missed contingency cases, automated contingency analysis has no practical use or has limitation. And in case of remedial action, it doesn`t support automated function or takes a lot of times to study, because of simulation in manual for each cases. This paper suggests that new relation with buses and transmission line properties of power system DB used for power system analysis program to simulate automated contingency including all contingency cases needed in the field without missed cases. And it proposes automated remedial action scheme based on practical approach analysis to alleviate overloading or voltage problems. Finally it deals with automated contingency/remedial action analysis(automated scheduled outage) program which is developed by KEPCO and its performance and proposed schemes are proven by case study for real Korean power system data.
Analysis on System Effects of SUS Tube in Optical Fiber Composite Power Cable Systems Using EMTP
Jung, Chae-Kyun ; Jang, Tai-In ; Kang, Ji-Won ;
The Transactions of The Korean Institute of Electrical Engineers, volume 63, issue 9, 2014, Pages 1180~1185
DOI : 10.5370/KIEE.2014.63.9.1180
This paper describes the effects on SUS tube of power optical fiber composite cable on underground transmission lines. The effects on grounding, air gap between SUS tube and metal sheath, contact resistance between outer semi-conducting layer and metal sheath and grounding of SUS tube application or not are variously analysed using EMTP in normal operating condition as well as single line to ground fault. From these results, in this paper, the scheme for protecting the electrically abnormal phenomena will be established on power-optical fiber composite cable of underground transmission lines. This paper can contribute to specification of grounding reference of SUS tube of optical fiber composite power cable system.
Weekly Maximum Electric Load Forecasting Method for 104 Weeks Using Multiple Regression Models
Jung, Hyun-Woo ; Kim, Si-Yeon ; Song, Kyung-Bin ;
The Transactions of The Korean Institute of Electrical Engineers, volume 63, issue 9, 2014, Pages 1186~1191
DOI : 10.5370/KIEE.2014.63.9.1186
Weekly and monthly electric load forecasting are essential for the generator maintenance plan and the systematic operation of the electric power reserve. This paper proposes the weekly maximum electric load forecasting model for 104 weeks with the multiple regression model. Input variables of the multiple regression model are temperatures and GDP that are highly correlated with electric loads. The weekly variable is added as input variable to improve the accuracy of electric load forecasting. Test results show that the proposed algorithm improves the accuracy of electric load forecasting over the seasonal autoregressive integrated moving average model. We expect that the proposed algorithm can contribute to the systematic operation of the power system by improving the accuracy of the electric load forecasting.
Economic Evaluation of Offshore Wind Farm in Korea
Min, Chang-Gi ; Hur, Don ; Park, Jong Keun ;
The Transactions of The Korean Institute of Electrical Engineers, volume 63, issue 9, 2014, Pages 1192~1198
DOI : 10.5370/KIEE.2014.63.9.1192
With an increase in the penetration of offshore wind farm, the need of an accurate economic evaluation of offshore wind farm has become crucial. This paper presents an economic evaluation method of offshore wind farm in Korea reflecting the cost of offshore wind farm infrastructure (offshore substation, submarine cable and foundation) in its cost model. Each cost of offshore substation, submarine cable, and foundation is represented as a function of installed capacity, distance to shore, and water level, respectively. We have applied the method to the case study of offshore in Jeju Island and analyzed the economics under various conditions. The results show that the distance to shore is of importance in economics of offshore wind farm.
Optimal Configuration Algorithm for ESS with Renewable Energy Resources Considering Peak-shaving Effects
Lee, Na-Eun ; Kim, Wook-Won ; Kim, Jin-O ;
The Transactions of The Korean Institute of Electrical Engineers, volume 63, issue 9, 2014, Pages 1199~1205
DOI : 10.5370/KIEE.2014.63.9.1199
A power system configuration has been increasingly advanced with a number of generating units. In particular, renewable energy resources are widely introduced due to the environmental issues. When applying the renewable energy sources with the ESS (Energy Storage System), the ESS is the role of a potential generating resource in the power system while mitigating the output volatility of renewable energy resources. Thus, for applications of the ESS, the surrounding environment of it should be considered, which means that capacity and energy of the ESS can be affected. Moreover, operation strategy of the ESS should be proposed according to the installation purpose as well as the surrounding environment. In the paper, operation strategy of the ESS is proposed considering load demand and the output of renewable energy resources on a hourly basis. Then, the cost of electrical energy is minimized based on the economic model that consists of capital cost, operation cost, fuel cost, and grid cost for a year. It is sure that peak-shaving effects can be achieved while satisfying the minimum cost of electrical energy.
A Study on Application for Y-Tz Transformer Winding Method to Decrease the Current Unbalance on the Source Side
Lee, Jung-Eun ; Song, Young-Joo ; Choi, Hong-Kyoo ; Kim, Tae-Hoon ; Kim, In-Tae ;
The Transactions of The Korean Institute of Electrical Engineers, volume 63, issue 9, 2014, Pages 1206~1211
DOI : 10.5370/KIEE.2014.63.9.1206
Most LV customers have been applying three-phase four-wire electric distribution system which supplies 1-phase and 3-phase load concurrently. Due to its structural simplicity, This system is easy to run. But it can also cause many problems from the unbalance, such as reduced output, increased loss etc. Also the unbalance in the load side causes the unbalance in the source side; it may lower the stability of the whole power system. In this paper, we propose the Y-Tz transformer winding method to reduce the current unbalance in the source side. Efficiency of this method was proven through the simulation and verification experiment.
Development of the Integrated Power Converter for the Environmentally Friendly Vehicle and Validation of the LDC using Battery HILS
Kim, Tae-Hoon ; Song, Hyun-Sik ; Lee, Baek-Haeng ; Lee, Chan-Song ; Kwon, Cheol-Soon ; Jung, Do-Yang ;
The Transactions of The Korean Institute of Electrical Engineers, volume 63, issue 9, 2014, Pages 1212~1218
DOI : 10.5370/KIEE.2014.63.9.1212
For OBC (On-Board Charger) and LDC (Low DC-DC Converter) used as essential power conversion systems of PHEV (Plug-in Hybrid Electric Vehicle), system performance is required as well as reliability, which is need to protect the vehicle and driver from various faults. While current development processor is sufficient for embodying functions and verifying performance in normal state during development of prototypes for OBC and LDC, there is no clear method of verification for various fault situations that occur in abnormal state and for securing stability of vehicle base, unless verification is performed by mounting on an actual vehicle. In this paper, a CCM (Charger Converter Module) was developed as an integrated structure of OBC and LDC. In addition, diverse fault situations that can occur in vehicles are simulated by a simulator to artificially inject into power conversion system and to test whether it operates properly. Also, HILS (Hardware-in-the-Loop Simulation) is carried out to verify whether LDC is operated properly under power environment of an actual vehicle.
Hardware Simulator for LVRT Operation Analysis of Grid-Tied PMSG Wind Power System
Lee, Jae-Wook ; Kim, Jae-Hyuk ; Choi, Young-Do ; Han, Byung-Moon ; Yoon, Young-Doo ;
The Transactions of The Korean Institute of Electrical Engineers, volume 63, issue 9, 2014, Pages 1219~1226
DOI : 10.5370/KIEE.2014.63.9.1219
This paper introduces a hardware simulator for the LVRT operation analysis of the grid-tied PMSG wind power system with a power dissipation circuit. The power dissipation circuit, which is composed of chopper and resistor, suppresses the sudden increase of DC-link voltage in the back-to-back converter of the grid-tied PMSG wind power system. The LVRT operation was first analyzed using computer simulations with PSCAD/EMTDC. A wind power simulator including the power dissipation circuit and the fault simulator composed of variac and IGBT were built to analyze the LVRT operation. Various experiments were conducted to verify the effectiveness of the power dissipation circuit for the LVRT operation. The developed hardware simulator can be extensively utilized for the analysis of various LVRT operations of the grid-tied wind power system.
Humidity Sensing Properties of 90[wt%] SnO
You, Do-Hyun ;
The Transactions of The Korean Institute of Electrical Engineers, volume 63, issue 9, 2014, Pages 1227~1232
DOI : 10.5370/KIEE.2014.63.9.1227
The purpose of this paper is to establish the optimum fabricating condition of specimens using silk screen printing, and to develop humidity sensor which has good humidity sensing properties. The specimens are fabricated under the condition of 90[wt%]
, and their microstructure, crystalline structure, humidity sensing properties are examined. From the microstructure analyses, porosity is best at 700[
]. From the crystalline structure analyses, intensity of peak becomes strong according to increasing heat treatment temperature. From the humidity sensing properties analyses, an overall results of capacitance changes, linearity and hysteresis for the specimens is best at 600[
] and 700[
]. Capacitance of specimens increases according to decreasing measurement frequency, and to increasing relative humidity.
A Study on the Characteristics of Dye Sensitized Solar Cells with TiO
Thickness and Sintering Temperature
Lee, Young-Min ; Lee, Don-Kyu ;
The Transactions of The Korean Institute of Electrical Engineers, volume 63, issue 9, 2014, Pages 1233~1238
DOI : 10.5370/KIEE.2014.63.9.1233
In this thesis, it is investigated the characteristics of Dye Sensitized Solar Cell (DSSC) according to variation of
thickness (6, 12, 18, and
) and three distinct
sintering temperatures (350, 450 and
) by XRD, SEM, I-V and UV-Vis spectrophotometer. According to sintering temperature,
was transformed into the anatase structure at
, rutile structure at
and further into the two structure at
. With increasing thickness up to
and sintering temperature up to
, respectively, the irradiance rate increased in the range of 9~26 percent and 2.80~5.10 percent. Whereas a further increase to
, the irradiance rate decrease in the range of 4~11 percent and 30~47 percent. The conversion efficiency increased in the range of 2.80~5.01 and 3.03~5.01 with increasing thickness up to
and sintering temperature up to
. By contrast, increase to
, the conversion efficiency decreased in the range of 3.31~5.01 and 2.80~3.89, respectively. The DSSC that thickness of
and sintered at
exhibited the most excellent characteristics, in which open-circuit voltage, short-circuit current, Fill Factor and conversion efficiency are 0.69 V,
, 0.64 and 5.01%, respectively.
Real-time Measurements of Water Level and Temperature using Fiber-optic Sensors Based on an OTDR
Sim, Hyeok In ; Yoo, Wook Jae ; Shin, Sang Hun ; Jang, Jaeseok ; Kim, Jae Seok ; Jang, Kyoung Won ; Cho, Seunghyun ; Moon, Joo Hyun ; Lee, Bongsoo ;
The Transactions of The Korean Institute of Electrical Engineers, volume 63, issue 9, 2014, Pages 1239~1244
DOI : 10.5370/KIEE.2014.63.9.1239
In this study, two fiber-optic sensors were fabricated to measure water level and temperature using optical fibers, a coupler, a Lophine and an OTDR (optical time-domain reflectometer). First, using Fresnel`s reflection generated at the distal-ends of each optical fiber, which was installed at different depth, we measured the water level according to the variation of water level. Next, we also measured the temperature of water using a temperature sensing probe based on the Lophine, whose absorbance changes with the temperature. The measurable temperature range of the fiber-optic sensor is from
because the maximum operation temperature of the optical fiber without a physical deterioration is up to
Design of a Robust Position Tracking Controller for Flexible Joint Manipulator Using Motor Angle
Lee, Sang-Myung ; Kim, In-Hyuk ; Son, Young Ik ;
The Transactions of The Korean Institute of Electrical Engineers, volume 63, issue 9, 2014, Pages 1245~1247
DOI : 10.5370/KIEE.2014.63.9.1245
This paper presents a robust position tracking controller for motor-driven flexible joint manipulators using only the motor angle measurement. The control problem is not easy because the link position is hard to estimate in the presence of parameter uncertainties. The proposed controller consists of a feedback linearization controller (FLC) and two proportional-integral observers (PIOs) that estimate both system states including the link position and an equivalent disturbance for compensating the parameter uncertainties. Comparative computer simulations are conducted to demonstrate the effectiveness of the proposed control algorithm.
The Study of Radiation Hardened Common Sensor Circuits using COTS Semiconductor Devices for the Nuclear Power Plant
Kim, Jong-Yeol ; Lee, Nam-Ho ; Jung, Hyun-Kyu ; Oh, Seung-Chan ;
The Transactions of The Korean Institute of Electrical Engineers, volume 63, issue 9, 2014, Pages 1248~1252
DOI : 10.5370/KIEE.2014.63.9.1248
In this study, we designed a signal processing module using a radiation hardened technology that can be applied to the all measurement sensors inside nuclear power plant containment. Also, for verification that it can be used for high-level radiation environment (Harsh environmental zone inside containment of NPP), we carried out evaluation tests for a designed module using a
gamma-ray source up to 12 kGy(Si). And, we had checked radiation hardening level that it has been satisfied up to 12 kGy(Si).
The Study for the Method of Fast and Efficient Gamma-ray Detection for the Stereo Gamma-ray Ddetection System
Hwang, Young-Gwan ; Lee, Nam-Ho ;
The Transactions of The Korean Institute of Electrical Engineers, volume 63, issue 9, 2014, Pages 1253~1258
DOI : 10.5370/KIEE.2014.63.9.1253
In this paper, we propose the fast and efficient detection method using the continuous measurement technique for the gamma-ray signal acquisition. This method is improved than the conventional method for the getting information of the radiation distribution. First, we implement the stereo radiation detection system using gamma-ray sensors and the motion controller. We apply continuous measurement technique to the gamma-ray detector and conduct gamma-ray irradiation test for the comparison of detection techniques. The results show that the continuous measurement technique has the high efficient performance than the conventional method.
Design and Evaluation of Real-time GNSS Attitude Determination Systems using Low Cost Receivers
Chae, JeongGeun ; Lee, DongSun ; Kang, In-Suk ; Park, Chansik ;
The Transactions of The Korean Institute of Electrical Engineers, volume 63, issue 9, 2014, Pages 1259~1265
DOI : 10.5370/KIEE.2014.63.9.1259
In this paper, the real-time attitude determination based Matlab using low-cost receivers was designed and evaluated. The GNSS attitude determination system was implemented to operation in real-time by TimerCallback in MATLAB. The TTM(Transmission Time Misalignment) of U-blox receiver was confirmed through zero baseline tests and this problem was revised. The computed attitude by the high-cost NovAtel receiver was compared to the computed attitude by the low-cost U-blox receiver. As a result of this, the performance of attitude determination systems by low-cost receiver was confirmed. To determine baseline, LAMBDA and BC-LAMBDA for integer ambiguities search methods were used. To confirm suitable integer ambiguity search method in real-time attitude determination algorithm, determined baselines by two methods were compared, and it was confirmed that BC-LAMBDA is more suitable. As a result of this, the operation of real-time attitude determination system was confirmed using 3 low-cost receivers.
Mobile Robot Navigation with Obstacle Avoidance based on the Nonlinear Least Squares Optimization Method using the Cost Function and the Sub-Goal Switching
Jung, Young-Jong ; Kim, Gon-Woo ;
The Transactions of The Korean Institute of Electrical Engineers, volume 63, issue 9, 2014, Pages 1266~1272
DOI : 10.5370/KIEE.2014.63.9.1266
We define the mobile robot navigation problem as an optimization problem to minimize the cost function with the pose error between the goal position and the position of a mobile robot. Using Gauss-Newton method for the optimization, the optimal speeds of the left and right wheels can be found as the solution of the optimization problem. Especially, the rotational speed of wheels of a mobile robot can be directly related to the overall speed of a mobile robot using the Jacobian derived from the kinematic model. When the robot detects the obstacle using sensors, the sub-goal switching method is adopted for the efficient obstacle avoidance during the navigation. The performance was evaluated using the simulation and the simulation results show the validity of the proposed method.
Spoofing Signal Detection Using Accelerometers in IMU and GPS Information
Kwon, Keum-Cheol ; Yang, Cheol-Kwan ; Shim, Duk-Sun ;
The Transactions of The Korean Institute of Electrical Engineers, volume 63, issue 9, 2014, Pages 1273~1280
DOI : 10.5370/KIEE.2014.63.9.1273
This paper considers a GPS anti-spoofing problem. Spoofing is an intentional interference that mislead the GNSS receiver. The spoofing attack is very significant since the target receiver is not aware of being attacked from spoofing. Accelerometers can be used to detect the spoofing signal by being compared with the acceleration obtained from GPS information using Kalman filter. In this paper we propose an N by N-point average and M-point window algorithm to detect GPS spoofing by using accelerometers and GPS outputs. The performance of the proposed algorithm is analyzed using actual vehicle trajectory and spoofing trajectory generated from INS and GPS toolbox for simulation.
The Improvement of Blur Phenomenon at Laser Beam Scanner
Roh, Jin Ki ; Kim, Hye Jin ; Kim, Kab Il ;
The Transactions of The Korean Institute of Electrical Engineers, volume 63, issue 9, 2014, Pages 1281~1285
DOI : 10.5370/KIEE.2014.63.9.1281
Recently, as the wide spread of smart phone, pico projector which is used at the smart phone is appeared as a portable display device. In this paper, among several pico projectors, laser beam scanner module is dealt with in which laser is used as light source, and mems-mirror is used as optical panel. In this device, screen image quality is a special issue, and blur effect is a typical adverse effect to the quality of this device. So the enhancement of this blur effect has an important factor of the quality of the device. The definition of the blur and the main source of the blur are studied and the simulation results and way of improvement are also suggested.
Development of the Electrodermal Activity Monitoring System for the Evaluation of Train Driver`s Arousal State
Lim, Min-Gyu ; Lee, Young-Jae ; Lee, Kang-Hwi ; Kang, Seung-Jin ; Kim, Kyeung-Nam ; Park, Hee-Jung ; Yang, Heui-Kyung ; Lee, Jeong-Whan ;
The Transactions of The Korean Institute of Electrical Engineers, volume 63, issue 9, 2014, Pages 1286~1293
DOI : 10.5370/KIEE.2014.63.9.1286
Typically, studies through the simulation system have been progressed, because the evaluation of the driver`s arousal state about the service of a actual train has risk of safety for the driver. When configured event same as the real in simulation system, the ability to cope with an accident situation may be the same each other. But the difference in the state of tension or arousal will occur. In this study, requested to cooperate with the railways in order to escape from these constraints, and the target of the experiment was to real engineer service. I was set about experiment when the train was stopped as safe as possible. As a result, the beta wave of EEG signals that representing complex calculations or anxiety is increased rapidly on the basis of a flag station from at the time of departure. The size of the electrodermal activity signal in response to movement of the body gave a noticeable. In terms of HRV, if the train approach a flag station gradually and the R-R interval is narrowed. So that the driver can be estimated as arousal state. In accordance with this study, if the quantitative standard of arousal state be based on the driver`s biosignals will provide, it will be able to take advantage of development the system that would prevent train accidents caused by human error.
Design of Hybrid Unsupervised-Supervised Classifier for Automatic Emotion Recognition
Lee, JeeEun ; Yoo, Sun K. ;
The Transactions of The Korean Institute of Electrical Engineers, volume 63, issue 9, 2014, Pages 1294~1299
DOI : 10.5370/KIEE.2014.63.9.1294
The emotion is deeply affected by human behavior and cognitive process, so it is important to do research about the emotion. However, the emotion is ambiguous to clarify because of different ways of life pattern depending on each individual characteristics. To solve this problem, we use not only physiological signal for objective analysis but also hybrid unsupervised-supervised learning classifier for automatic emotion detection. The hybrid emotion classifier is composed of K-means, genetic algorithm and support vector machine. We acquire four different kinds of physiological signal including electroencephalography(EEG), electrocardiography(ECG), galvanic skin response(GSR) and skin temperature(SKT) as well as we use 15 features extracted to be used for hybrid emotion classifier. As a result, hybrid emotion classifier(80.6%) shows better performance than SVM(31.3%).
A Study on the Optimization of Power Supply Equipment for Plate Mill Plant in Steelworks
Ko, Hyun-Ok ; Park, Ji-Ho ; Kim, Dong-Wan ;
The Transactions of The Korean Institute of Electrical Engineers, volume 63, issue 9, 2014, Pages 1300~1305
DOI : 10.5370/KIEE.2014.63.9.1300
In this paper, we suggest an optimization method which can save about 5[%] of the cost though the optimizing of configuration and capacity for the facility. To achieve this goal, we compared the design data of the power, motor and drive system with the actual operation data of the plate mill plant in K-Steelworks. Therefore we measured the actual loading data by facilities considering the operating conditions of the plate mill plant in K-Steelworks, after that analyzed these data. In addition, we review the optimal capacity for transformer, switchgear and drive, and also reconfigured the electrical room and power single line diagram through the validation of motor data by equipment and the confirmation of process data considering the load characteristics. Consequently, the optimization method of capacity for the facilities shall have effectiveness in building new plate mill plant to further reduce costs at future.
A Study on Enhancing Regenerative Energy Efficiency for Urban Railway Vehicles by Applying Energy Storage System
Woo, Jong-Hyuk ; Han, Jung-Ho ; Lee, Ju ;
The Transactions of The Korean Institute of Electrical Engineers, volume 63, issue 9, 2014, Pages 1306~1311
DOI : 10.5370/KIEE.2014.63.9.1306
In this paper, effect of recharging power by using ESS(Energy Storage System) was investigated when ESS was applied to the train. The recharging power was analyzed and measured. Also, by applying ALVT algorithm, effective recharging and discharging were studied. By using this process, recharging and discharging of the super capacitor were improved which led to enhancing the use of recharging power from the urban Railway vehicles.
Development of LED Auxiliary Power System for Ship using DSSC
Lee, Jin ; Yang, Jae-Chang ; Kim, Sang-Ki ; So, Soon-Youl ;
The Transactions of The Korean Institute of Electrical Engineers, volume 63, issue 9, 2014, Pages 1312~1316
DOI : 10.5370/KIEE.2014.63.9.1312
The color and the installation position of the LED lamp for night voyage of the ship are changed by the purpose of it. The power dissipation occurs because a navigation light is on and off or continuously on. In addition, in case that the light is produced by operating generator in the ship, it`s very inefficient except that it`s on a voyage. Therefore in this dissertation, we construct auxiliary power system for the LED lamp of the ship, producing and developing a module, a panel, and a charging system using Dye-sensitize Solar Cell.
A Study on the Uninterruptible Power Supply on the Open Phase of Three-phase Motor
Shin, Hyr-Young ; Choi, Hong-Kyoo ;
The Transactions of The Korean Institute of Electrical Engineers, volume 63, issue 9, 2014, Pages 1317~1320
DOI : 10.5370/KIEE.2014.63.9.1317
In case of using three-phase induction motor in three-phase power system, if he deficiency happens in phase among three-phase, the motor will drive in an open phase state. As to the motor, the continuing operation is possible then, but the phenomenon that the power supply stops happening by the result of the overload electricity order on the healthy phase of two phases with a damage and activating the circuit breaker. Consequently, in order to overcome this problem in treatise accordingly. I propose an uninterruptible power supply which is able to prevent that the over current on the health phase through the restoration that in case happening open phase on the power line when driving the motor. Also, it is possible to supply power consecutively without interruption of electric power and we proved the performance and reliability through an experiment.