• Proceedings of the KIEE Conference
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• 2003.11a
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• pp.31-33
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• 2003

Power system restoration following a partial or complete blackout starts with energizing of primary transmission lines. Because system changed rapidly during early restoration process, transformer energization and load pickup is executed to maintain the power system stability. However unexpected problem such as harmonic overvoltage may be arisen during energizing transformer. The reason of harmonic overvoltage is known as transformer saturation and magnetizing in-rush current and so on, but it is difficult to estimate the condition of occurrence. This paper describes the analysis of the harmonic overvoltage while unloaded transformer is energized using PSCAD/EMTDC.

• Proceedings of the KIEE Conference
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• 2003.07b
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• pp.958-960
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• 2003

Although the researches and developments are performed for superconducting technologies, many problems such as AC loss and quench phenomenon still remain to design the superconducting transformer. In addition, pre-study on the three phase high temperature superconducting (HTS) transformer is a sort of time and expense consuming work, thus it is very worthy of being analyzing the characteristics of HTS transformer in advance through proper simulation programs and skills. This paper presents an effective simulation method for the three phase HTS transformer using components developed in the PSCAD/EMTDC.

• The Transactions of the Korean Institute of Electrical Engineers P
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• v.65 no.3
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• pp.219-223
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• 2016

DC microgrid system is attracted attention in the world, because DC distribution system is more energy efficient than AC distribution system. To analyse the contribution effects of distributed generation(DG) in LVDC distribution system through modeling the Rectifier, DC/DC converter, Energy Storage System(ESS) and Photovoltaic(PV). using PSCAD/EMTDC. This paper analyses fault response characteristics in LVDC distribution system according to the interconnection and islanding operation of DG. Based on research results on the paper, direction for development of fault current reduction method for LVDC distribution system is suggested.

• Proceedings of the KIEE Conference
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• 2007.07a
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• pp.790-791
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• 2007

최근 분산전원의 한 형태로써 주목받고 있는 열병합발전은 전기와 열을 함께 생산하여 에너지의 이용효율을 높이는 발전방식이며, 이를 위해 시스템의 형태와 각 구성요소를 효율적, 경제적으로 구성하여야 한다. 시간에 따른 열 및 전력수요의 패턴이 변화하므로 생산하는 전기와 열에너지의 비율 즉 열전비를 동적으로 표현할 수 있는 모델이 필요하다. 본 논문에서는 열병합발전의 열전비 특성을 효과적으로 구현하기 위한 방법을 발전기의 출력특성과 관련하여 연구하고, PSCAD/EMTDC를 이용하여 구현하고자 한다.

• Proceedings of the KIEE Conference
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• 2007.07a
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• pp.99-101
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• 2007

제주-해남간 HVDC 변환설비는 제주 전력수요의 40%를 담당하는 주요 설비로, 국내에서는 처음으로 도입되어 상용 운전중인 직류송전 설비이다. 그동안 여러 차례의 크고 작은 고장이 발생하였으며, 이중에는 원인을 정확히 알 수 없었던 고장도 있었고, 변환설비 주요기기에 고장 파급 영향을 미칠만한 큰 고장도 있었으나, 정확한 분석이 어려웠던 사례도 있었다. 본 논문은 PSCAD/EMTDC 프로그램을 도입하여 변환설비 고장원인 분석에 활용하는 방안에 대하여 고찰하였다.

• Proceedings of the KIEE Conference
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• 2005.10c
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• pp.253-256
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• 2005

In this paper, doubly-fed induction-type wind power generation system simulation model for grid connection is developed. The simulation model is based on PSCAD/EMTDC and consists of rotor-blade, generator, power converter and controller. Simulation results are shown for the variable wind speed conditions. The simulation model can be utilized for study of actual interaction between wind turbine and grid for reliable operation and protection of power system.

• Proceedings of the KIEE Conference
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• 2004.11b
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• pp.204-207
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• 2004

The paper proposes a simulation model of grid-connected photovoltaic generation system (PV system) using on PSCAD/EMTDC, a reliable power system and apparatus transient analysis program. A equivalent circuit model of a solar cell is used for modeling solar array. A series of parameters required for array modeling are deduced from general specification data of a solar module. A PWM voltage source inverter (VSI) model is presented and current control scheme is implemented for VSI control. A maximum power point tracking (MPPT) technique is applied for controlling the PV system. Simulation case study provides V-I and V-P characteristics of solar array and PV system control performance for irradiation changes.

• Progress in Superconductivity and Cryogenics
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• v.7 no.1
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• pp.25-31
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• 2005

Since the discovery of the high temperature superconductors many researches have been performed for the practical applications of superconductivity technologies in various fields. As results, significant progress has been achieved. Especially, Superconducting Fault Current Limiter (SFCL) offers an attractive means In limit fault current in power systems. HTS resistive type SFCL is based on the ultra fast transition from the superconducting (non resistive) state to the normal (resistive) state by overstepping the critical current density, In this study, the simulation method of resistive type superconducting fault current limiter using EMTDC is proposed and the developed EMTDC model of SFCL is applied to the modeled power network using the Parameters of real system.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.29 no.4
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• pp.102-107
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• 2015

In this paper, the generator control system by using PSCAD/EMTDC was modeled and several faults simulation were performed. The generator control system is composed of generator, turbine, exciter and governor. The parameters of generator control system model were obtained from field power plant. And then, the various transient phenomena through obtained several signal of developed modeling were analyzed.

• Proceedings of the KIPE Conference
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• 2001.10a
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• pp.600-605
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• 2001

This paper deals with dynamic performance of the Cheju - Haenam HVDC system. The purpose of the study is to verify the control characteristics of the HVDC system and to analyze the dynamic performances by simulation study. Because the HVDC system consists of analogue and digital controller, the simulation is achieved with specification model incorporating nonlinear function. The dynamic performance simulations are performed by PSCAD/EMTDC