• Proceedings of the KIEE Conference
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• 1994.11a
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• pp.3-5
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• 1994

It is shown that the power flow considering the voltage characteristic of the composite load has some difference comparing with conventional load flow in this paper. When the load flow is used in a study of the static voltage stability, it is necessary to consider the voltage characteristic of load, since the composite load of a typical power system bas constant power, constant current, and constant impedance characteristic. The load is modeled to a polynomial form in here, and used in solving the load flow problem. In this way, the effect which the voltage characteristic of the load has on several voltage collapse proximity indicator based on sensitivities is compared with the conventional load flow, or with another load model having a different voltage characteristic. In this paper, the voltage collapse proximity indicator using the sensitivity of real power for transmission loss is also proposed, and compared with other indicators.

• Proceedings of the KIEE Conference
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• 2009.07a
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• pp.2174_2175
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• 2009

This Paper present about loop impedance characteristic based on korea internal electrical environment. Analysis parameters were touch voltage, electrical shock current and human body resistance. Result, For protect of electrical shock must measuring of loop impedance. And current capacity & loop impedance are must important parameters.

• KIEE International Transactions on Electrophysics and Applications
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• v.3C no.2
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• pp.55-58
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• 2003

This paper examines the electrical characteristic of single oxide layer due to various diffusion conditions, substrate orientations, substrate resistivity and gas atmosphere in a diffusion furnace. The oxide quality was examined through the capacitance-voltage characteristic due to the annealing time after oxidation process, and the capacitance-voltage characteristics of the single oxide layer by will be described via semiconductor device simulation.

• Proceedings of the KIEE Conference
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• 1993.07b
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• pp.794-796
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• 1993

This paper deals with the characteristic analysis of noise filter for the reduction of conduction noise, especially, common-mode noise. Attenuation in the system containing noise filter is analyzed and equivalent circuits for common- and differential- mode noise are derived. To clarify the effects by parasitic components of the inductor and capacitor, digital simulations using Design Center are carried out.

• Proceedings of the KIEE Conference
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• 2002.07b
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• pp.753-755
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• 2002

This paper presents the characteristic analysis by changing the shape and position of auxiliary pole core for Automotive stater motor. The brush contact resistance and mechanical loss calculated from the experimental data are used in characteristic analysis. The Finite Element Analysis Method(FEM) and 3D Equivalent Magnet Circuit Network(EMCN) are used for analysis. The validity of the proposed methods are verified by comparison of analysis results and experimental ones.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.62 no.11
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• pp.1610-1616
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• 2013

Recently, district heating and cooling (DHC) systems based on combined cycle generation (CCG) providers are increasing in Korea. Since characteristics of combined heat and power (CHP) generators and heat demands of providers, heat trading between DHC providers based on the economic viewpoint is required; the heat trading has been doing. In this paper, a mathematical model for optimal operation based on heat trading between DHC providers is proposed. Especially, start-up characteristic of CCG is included. The operation model is established by mixed integer linear programming (MILP).

• Proceedings of the KIEE Conference
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• 2008.04c
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• pp.41-43
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• 2008

This paper presents the characteristic analysis of Double-Sided Linear Synchronous Generator for wave power generation under different operating conditions. FEM is applied to analyze performance of generator at no-load and load with variable resistance. Moreover, the validity of characteristic analysis is confirmed through the experimental work.

• Proceedings of the Korea Electromagnetic Engineering Society Conference
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• 2005.11a
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• pp.259-264
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• 2005

In this paper, a novel compact microstrip-fed antenna with band-rejection characteristic for wideband applications is proposed. By cutting an L-shaped notch on the radiation patch, the wideband property for the proposed antenna is achieved. In addition, a C-shaped slot is introduced to obtain the band rejection operation of the antenna. The antenna, with very small size of $15.5\times21 mm^2$ including the ground plane, operates over 3.08 to 10.97 GHz and has the rejection band of 5.03 to 5.91 GHz for $S_{11}$ < -10 dB.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2010.06a
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• pp.383-383
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• 2010

TiN is one of the mostly used barrier materials in copper metallization because of low friction coefficient and superior electrical properties. We need to investigate for the etching characteristic of TiN. In this study, we investigated about etching characteristic of TiN using $BCl_3$/Ar inductively coupled plasma system. The etch rate was measured by a depth pro filer. The chemical etching reactions of the TiN surface was investigated X-ray photoelectron spectroscopy.

• Journal of the Korean Institute of Electrical and Electronic Material Engineers
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• v.22 no.3
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• pp.210-217
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• 2009

Insulated methods of compact bus duct has been applied a way of coating Epoxy powder. The problem which is caused by degradation during operation is very important in severe environment. Therefore, this study compared and verified many kind of properties ; electrical breakdown by thermal and water aging, v-t characteristic, arc discharge, mechanical properties, bending test and cross cut. Sample D was stable before the $T_g$ to be about $7{\sim}10 %$ decrease in the breakdown test according to temperature change. In case of V-t and arc discharge, it had been kept up suitable characteristic. Also, in case of electrical and mechanical characteristic, both sample D and A have excellent capacity.