• Proceedings of the KIEE Conference
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• 2002.07b
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• pp.1385-1387
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• 2002

In the case of HTS Resistive type Superconducting Fault Current Limiter(SFCL), its possibility has been discussed due to its theory and a simple structure. The Resistive type SFCL can be useful for the protection of the power delivery systems from fault current. Effective simulation scheme that can be applied to the utility network readily and cheaply under various conditions considering the sort of faults, the capacity of systems as well are strongly expected and emphasized among researchers. This paper proposes a simulation skill of resistive type SFCL using PSCAD/EMTDC.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.56 no.3
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• pp.457-464
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• 2007

Micro-Grid comprising Micro-Sources supplying several $kW{\sim}MW$ power to local customers is environmentally friendly and reliable. This paper deals with the development of simulation models of Micro-Grid on the PSCAD/EMTDC platform for analyzing various aspects of the interaction of the Micro-Grid. The developed switching level model adopts the space vector PWM. Both switching level and power frequency Micro-Source models are developed, which shows that power frequency modeling is sufficient for analyzing the phenomena of interest. Control characteristics of the Micro-Sources with the parameter and load power variation are analyzed for power quality enhancement. The simulation results show that the developed models are effective for studying Micro-Grid.

• Proceedings of the KIEE Conference
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• 2002.07a
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• pp.232-234
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• 2002

A Vacuum Circuit Breaker Model for simulation of transient overvoltages was developed by using the PSCAD/EMTDC. The Model includes the power frequency chopping current. Breaker withstand voltage, and quenching capability of High frequency currents. To verify the abilities of the breaker model, the simulation on the Lindmayer's single-phase circuit was carried out. The results show that using the proposed model, the transient overvoltages, current chopping, and multiple reignitions of vacuum breaker are properly reproduced as real phenomena. In further study, virtual chopping current will be incorporated into the model for 3 phase system.

• Proceedings of the KIEE Conference
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• 1995.11a
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• pp.80-82
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• 1995

This paper describes a computer model of the secondary arc associated with single pole switching scheme to use in system simulation studies. The computer model is based on the mathematical model described by A.T.Johns, et.al[3], and is implemented by the EMTDC which is similar to the Electro Magnetic Transient Program(EMTP). Simulation results using the computer model compare with a previous simulation and field test results.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 1999.05a
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• pp.255-258
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• 1999

We investigated the current limiting characteristics of resistive and inductive SFCLs with 100 $\Omega$ of quench impedance for a single line-to-ground fault. which accounts for about 70% of the total power line faults, in the 154 kV transmission system. The fault simulation at the phase angles 0$^{\circ}$, 45$^{\circ}$, and 90$^{\circ}$ showed that the resistive SFCL limited the fault current less than 15 kA without any DC component after one half cycle from the instant of the fault. On the other hand, the inductive SFCL suppressed the current below 12 KA, but with 3 kA of DC component which decreased to zero in 5 cycles. We concluded that the inductive SFCL had higher performance in current limiting but the resistive SFCL was better from the view point of DC components.

• The Transactions of the Korean Institute of Electrical Engineers A
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• v.51 no.7
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• pp.341-348
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• 2002

Recently, an SVC(Static Var Compensator) was installed at Seo-daegu substation in order to maintain the voltage level and reserve stability margin of the Korean Power System. This paper deals with the development of the simulation model for the Seo-daegu SVC. As a simulation platform, PSCAD/EMTDC is adopted and library components for the SVC are developed. The model includes detailed control system functions of Seo-daegu SVC. In order to verify the developed model, simulation results are compared with the TNA test performed by ABB. The results show a good agreement of the developed model with the real system.

• 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.

• Proceedings of the KIEE Conference
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• 1998.11a
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• pp.242-244
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• 1998

We have performed an EMTDC simulation for the current limiting effects of a superconducting fault current limiter (SFCL) for the 154 kV transmission line between the Gaepo and Sungnam substations. The simulation showed that a line-to-line fault increases the fault current up to 54 kA. The SFCL with $100{\Omega}$ impedance after quench limited the current to 15 kA within a half cycle. This limited current is well below the upper limit of a circuit breaker, suggesting that the impedance of the SFCL in the transmission line is sufficient.

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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• 2008.05a
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• pp.252-254
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• 2008

In this paper, the PSCAD/EMTDC modeling of JeJu AC power system with wind farms will be discussed. And the modelling of the synchronous generator, exciter, governor will also be defined in the JeJu power system by using the PSCAD/EMTDC. At the same time the fault analysis and the power flow analysis in JeJu AC power system are presented to demonstrate the JeJu AC power system can perfectly simulate the real JeJu power system function. Through the simulation using PSCAD/EMTDC we have gained the same results compared with the results accomplished by the PSS/E. so the validity of the modelling for the JeJu power system by using PSCAD/EMTDC is confirmed.

• Proceedings of the KIEE Conference
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• 2011.07a
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• pp.1298-1299
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• 2011

본 논문에서는 전력계통의 조류해석에 자주 사용되는 PSCAD/EMTDC 상용 소프트웨어를 이용하여 영구자석형 풍력발전 시스템을 모델링하였다. 발전기의 최대 출력을 얻기 위한 제어전략, 풀 컨버터를 통해 발전된 전력을 계통에 연계하는 기법과 시뮬레이션 결과를 기술하였다.