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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
Journal Basic Information
Journal DOI :
The Korean Institute of IIIuminating and Electrical Installation Engineers
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Volume & Issues
Volume 26, Issue 12 - Dec 2012
Volume 26, Issue 11 - Nov 2012
Volume 26, Issue 10 - Oct 2012
Volume 26, Issue 9 - Sep 2012
Volume 26, Issue 8 - Aug 2012
Volume 26, Issue 7 - Jul 2012
Volume 26, Issue 6 - Jun 2012
Volume 26, Issue 5 - May 2012
Volume 26, Issue 4 - Apr 2012
Volume 26, Issue 3 - Mar 2012
Volume 26, Issue 2 - Feb 2012
Volume 26, Issue 1 - Jan 2012
Selecting the target year
Evaluation of the Lighting Characteristics in High Power White LED Module with Cooling Condition
Yun, Janghee ; Ryeom, Jeongduk ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 26, issue 12, 2012, Pages 1~8
DOI : 10.5207/JIEIE.2012.26.12.001
The performance and lighting characteristics of the LED depend on cooling condition because the power LED generates lots of heat. In this paper, the effect of the generated heat from power LED module on lighting characteristics and performance is measured and evaluated. For experiments, the transient temperature of a power LED module with cooling condition is measured. In addition, the temperature and lighting characteristics of the LED module are measured during the steady state. As a result, the cooling condition is less effective on the lighting characteristics of the LED module at rated current but the cooling condition extremely affects those of the LED module over the rated current. Because high temperature of the power LED module causes the low phosphor conversion, luminance efficiency becomes low and color temperature becomes high. When power LED module are driven over the rated condition, higher temperature is directly related to lighting characteristics and performance of the LED module rather than higher current.
Efficiency Optimization Control of IPMSM drive using SC-FNPI Controller
Ko, Jae-Sub ; Chung, Dong-Hwa ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 26, issue 12, 2012, Pages 9~20
DOI : 10.5207/JIEIE.2012.26.12.009
This paper proposes the efficiency optimization control of interior permanent magnet synchronous motor(IPMSM) drive using series connected-fuzzy neural network PI(SC-FNPI) controller. The PI controller is generally used to control IPMSM drive in industrial field. However, the PI controller has problem which is falling control performance about parameter variation such as command speed, load torque and inertia due to fixed gain of PI controller. Therefore, to improve performance of PI controller, this paper proposes SC-FNPI controller adjusted input of PI controller by FNN controller according to operating conditions. Also, this paper proposes efficiency optimization control which is improving efficiency with minimize loss. The SC-FNPI controller proposed in this paper is compared control performance with conventional FNN and PI controller about command speed, load torque and inertia variation. And the efficiency optimization control is compared with $i_d
Lightning Risk Assessment for Structures Lower than 20m High
Lee, Ju-Chul ; Kim, Gi-Hyun ; Lee, Young-Chul ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 26, issue 12, 2012, Pages 21~27
DOI : 10.5207/JIEIE.2012.26.12.021
Korean Industrial Standards for lightning protection system complies with IEC standards. However, the standards are applicable only to buildings and structures more than 20 meters in high. Therefore, it is necessary to determine whether lightning protection system should be installed on structures lower than 20 meters high. This paper proposes an efficient method of assessing risk against lightning of structures lower than 20 meters high. The method suggests simplified lightning protection system and provides selecting an appropriate protection level. The suggested method assumes that structure under assessment has no lightning protection system and there is no person around the structure at the moment of lightning stroke. A simplified method of assessing the risk to human within the structure is developed by adopting the general assessment factor. The selection of a protection level is possible by comparing tolerable risk with physical damage risk caused by a direct lightning. Finally, this paper gives ways to establish surge protection measures when a structure with lightning risk is within a radius of 2km from the assessed structure even if this structure requires no lightning protection system.
Selection of Transformer for the Augmentation of an Existing AIS EHV Substation in Hilly Terrain at 3000m+ Altitude
Kim, Kwang-Soo ; Kang, Byoung-Wook ; Kim, Jae-Chul ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 26, issue 12, 2012, Pages 28~36
DOI : 10.5207/JIEIE.2012.26.12.028
Augmentation of existing EHV substations located in hilly terrain and at high altitude require many different considerations as compared to substations located in plain areas and at lower altitude. Owing to high altitude and steep terrain, meticulous engineering and preparations are required, considering the actual available space at the existing substation. Historical fault events too must be considered to enhance reliability and performance of the substation equipment. This paper proposes ways to augment the existing 2 banks of 20MVA, 220/66kV power transformers (
, single-phase) to
/63MVA, 220/66kV power transformers to meet continuously increasing demand of the capital city over the next 20 years. Upgrading and augmentation of existing substations, especially the main transformers and associated equipment, require replacement with minimum or no disturbance to the existing power supply system. Considerations should also be made during engineering and design, the operational flexibilities, maintenance aspects, future expandability and value addition, in terms of reliability and space usage of the existing substation.
Development of UV-IR Camera using IR Module and Improved UV Filter Transmittance
Kim, Young-Seok ; Shong, Kil-Mok ; Bang, Sun-Bae ; Kim, Chong-Min ; Choi, Myeong-Il ; Kim, Woo-Jin ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 26, issue 12, 2012, Pages 37~43
DOI : 10.5207/JIEIE.2012.26.12.037
UV-IR diagnostic technology is being used for predictive maintenance of high voltage equipment together with IR-thermography and ultrasonic devices. In this paper, the UV-IR camera design, fabrication, and perform a simple test to be take advantage of the diagnostic equipment. UV-IR camera developed a
of the field of view as a conventional camera to diagnose a wide range of slightly enlarged, and power equipment to measure the distance between the camera and the distance meter has been attached. In a distance of 5m with the UV-IR it is possible to detect partial discharge with a PD level of 2.5 pC and a RIV(Radio Influence Voltage) level of
Improvement of Circuit-Time Product through Analysis of Operating Time of Earth Leakage Circuit-Breakers
Kim, Ju-Chul ; Lee, Sang-Joong ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 26, issue 12, 2012, Pages 44~49
DOI : 10.5207/JIEIE.2012.26.12.044
The earth leakage circuit-breakers installed to protect the human body against electrical shock have conventionally had a sensitivity current of 30 mA and an operating time of 30 ms or less. No reviews are found, however, on the operating time of the current conducting through the human body due to the electrical shock or ground fault. This paper measures the trip-operating time against the earth leakage under the condition of increased current as well as under the condition of rated sensitivity current of the earth leakage circuit-breakers. Further measurement with a prototype model showed an improved operating time of 16 ms or less under the condition of rated sensitivity current. It is expected that development of circuit-breakers with higher safety is possible if the performance of the electronic circuit can be improved.
An Application of Optimization method for Efficient Operation of Micro Grid
Kim, Kyu-Ho ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 26, issue 12, 2012, Pages 50~55
DOI : 10.5207/JIEIE.2012.26.12.050
This paper presents an application of optimization method for efficient operation in micro grid. For operational efficiency, the objective function in a diesel generator consists of the fuel cost function similar to the cost functions used for the conventional fossil-fuel generating plants. The wind turbine generator is modeled by the characteristics of variable output. The cost function of fuel cell plant considers the efficiency of fuel cell. Particle swarm optimization(PSO) and sequential quadratic programming(SQP) are used for solving the problem of microgrid system operation. Also, from the results this paper presents the way to attend power markets which can buy and sell power from upper lever grids by connecting a various generation resources to micro grid.
The Effect of Geomagnetically Induced Current(GIC) on the Domestic Power Grids
Shim, Haesup ; Jeon, Taehyun ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 26, issue 12, 2012, Pages 56~61
DOI : 10.5207/JIEIE.2012.26.12.056
There have been a lot of reports about the effects of geomagnetically induced current(GIC) on the power grids. However there has been little domestic efforts made in this relatively urgent area which include academic research or risk assessments on GIC. There still exist a claim that domestic power grids might be in the safe state from GIC since our geomagnetic latitude is low and our power grid is relatively small scale. However it has been already demonstrated that GIC has an effect on power grids located at all latitudes. In this study, we have reviewed the transpiratory principle of the GIC, case studies of the major damage in various regions and we have calculated the GIC that can occur in domestic power grids. This paper presents some of the fundamental information about the risk assessment of domestic power grids from GIC although more thorough investigation should be made to ensure the safe operation of nationwide electric power infrastructure.
The Inverter Control Method Using The Voltage Sag Compensation algorithm
Yun, Hong-Min ; Bae, Jin-Yong ; Kim, Yong ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 26, issue 12, 2012, Pages 62~67
DOI : 10.5207/JIEIE.2012.26.12.062
In this paper general purpose voltage source inverter drives are equipped with an under-voltage protection mechanism, causing the system to shut down within a few milliseconds after a power interruption in the main input sources. When a power interruption occurs finish, if the system is a large inertia restarting the load a long time is required. This paper suggests modifications in the control algorithm in order to improve the sag ride-through performance of ac inverter. The new proposed strategy recommends maintaining the DC-link voltage constant at the nominal value during a sag control algorithm, experimental results are presented.
Analysis on Fault Current Limiting Characteristics According to Peak Current Limiting Setting of a Flux-Lock Type SFCL with Peak Current Limiting Function
Ko, Seok-Cheol ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 26, issue 12, 2012, Pages 68~73
DOI : 10.5207/JIEIE.2012.26.12.068
In this paper, the fault current limiting characteristics of a flux-lock type superconducting fault current limiter (SFCL) with peak current limiting function were analyzed through its short-circuit tests. The setting condition for the peak current limiting operation was derived from its electrical equivalent circuit, which was dependent on the inductance ratio between the third coil and the first coil. Through the analysis on the short-circuit tests for the flux-lock type SFCLs with the different inductance ratio between the third coil and the first coil, the setting value for the peak current limiting operation of the flux-lock type SFCL with peak current limiting function could be confirmed to be adjusted with the variation of the inductance ratio between the third coil and the first coil.
A Study on the Effect of Superconducting Fault Current Limiter in Power System with Separated Bus and Superconducting Fault Current Limiter
Kim, Myong-Hyon ; Kim, Jin-Seok ; Lim, Sung-Hun ; Kim, Jae-Chul ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 26, issue 12, 2012, Pages 74~79
DOI : 10.5207/JIEIE.2012.26.12.074
Currently, separated buses were increased to limit a fault currents in power transmission system. However, separated buses caused bad influences such as a decrease of reliability and stability. Superconducting fault current limiter (SFCL) was proposed to limit a fault current lately and that has many merits beside any other solutions. Therefore, we proposed the install of Superconducting fault current limiter (SFCL) in power transmission system with separated bus. And our proposal was verified by reliability of power system.
Simulation Study of Characteristics for Device of the High Voltage Pulse Generator
Kim, Young-Ju ; Shin, Ju-Hee ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 26, issue 12, 2012, Pages 80~86
DOI : 10.5207/JIEIE.2012.26.12.080
The high-voltage pulse generator is consist of transformers of fundamental wave and harmonic waves, and shunt capacitances. The pulse has the fundamental wave and the harmonic waves that have been increased as a series circuit by the transformers to make high voltage pulse. This paper shows the high-voltage pulse generator simulation using a circuit program with experiment data. In the equivalent circuit, magnetized inductances and loss resistances which affect output voltage, have been obtained. The output capacitor circuits have characteristics of band pass. The output voltages of the pulse width 50% and 25%(PWM) were obtained. The output of the high-voltage pulse generator is 2.5kHz, 1.8kV.
Electrohydrodynamic Characteristics of AC Corona Discharge for the Frequency
Jung, Jae-Seung ; Kim, Jin-Gyu ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 26, issue 12, 2012, Pages 87~92
DOI : 10.5207/JIEIE.2012.26.12.087
In this paper, EHD(electrohydrodynamics) characteristics of AC corona discharge for the various frequency was investigated. Ionic wind velocity is controlled by the frequency of applied ac high voltage, and maximum velocity of the ionic wind is obtained at 1.2kHz. Maximum velocity are 1.90 m/s by metal corona electrode and 2.72m/s by wet porous corona electrode, These attain 91~99% of the maximum velocity in the DC corona discharge by adjusting the frequency through the experiments. In this paper, wet porous corona electrode has high possibility of cooling methode because a AC corona discharge using wet porous corona electrode is able to eject more water droplets than DC corona discharge.
Evaluation of Congestion Cost and Loss Cost using DC Load Flow
Bae, In-Su ; Song, Woo-Chang ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 26, issue 12, 2012, Pages 93~98
DOI : 10.5207/JIEIE.2012.26.12.093
Economics of available alternatives in the transmission planning are evaluated by the investment cost, loss cost and congestion cost. Congestion/loss cost is calculated in many years and many load levels by unit commitment of generators, optimal dispatch, load flow, judgement about transmission congestion and re-dispatch to reduce the congestion. The greatest difficulties to introduce variable optimization techniques on the transmission planning is the convergence of load flow. In this paper, economics in the transmission planning are evaluated using DC load flow, and case study is conducted on the Korea power system by proposed congestion/loss calculation methods.