• 대한전기학회논문지:전력기술부문A
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• 제52권9호
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• pp.521-527
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• 2003

This study presents the AC railway system modeled by EMTDC in detail. The ,model made by EMTDC have a lot of advantages. It could be available for the system change, simulated repeatedly and also applied regarding very complicated systems. EMTDC simulations to verify this model are compared with the hand calculations. It is confirmed that the model made by EMTDC is correctly designed.

• 전기학회논문지P
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• 제58권1호
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• pp.9-14
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• 2009

The modelling of PEMFC(Proton Exchange Membrane Fuel Cell) has been studied in many kinds of methods. But there are some limitations in application of the developed models to analyze transient phenomena of power systems. The PSCAD/EMTDC is very popular simulation tool in power system areas. To analyze power systems interconnected to PEMFCs, the PSCAD/EMTDC model of the PEMFCs is needed. In this paper, we developed a PSCAD/EMTDC model of PEMFC based on electro-chemical characteristic equations of PEMFC. Also, we performed simulations using the developed model in the PSCAD/EMTDC program and tested appropriateness of the proposed models. The simulations showed good results.

• 대한전기학회논문지:전력기술부문A
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• 제51권12호
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• pp.624-629
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• 2002

This paper presents the first Simulation model using EMTDC program to analyze the electrified train voltage distribution characteristics in ac auto-transformer 1110 railroads. In general, all of the electrified train supply system has the characteristics that the train supply line is a naturally non-symmetrical and unbalanced system. Also, it is needed to model the Scott transformer which invert the balanced 3-phase quantity into 2-phase. Therefore, the general simulation methodology using previous simplified equivalent circuit or RMS based program can't obtain the accurate results to reflect the real-time operation because these methodology is basically assumed on completely 3-phase balanced system. To overcome these defects, in this paper, the EMTDC simulation model to analysis the completely electrified railroad system with Scott transformer and AC auto-transformer is presented. Also, the correctness of EMTDC modeling is confirmed by the old basic concepts and we think that this EMTDC model has the future powerful capability for application of railroad system analysis.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2001년도 춘계학술대회 논문집 전력기술부문
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• pp.123-125
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• 2001

In general, the PSS/E program is used for analyzing KEPCO System in terms of stability and the EMTDC Program is needed to analyze the transient characteristics of power system. The FSS/E provides various control models such as exciter. governor and PSS models whereas there ale few control of models in EMTDC. In this paper. we developed an EMTDC model for IEEET3 exciter which has been applied in KEPCO system. The EMTDC model is developed by examining PSS/E control block and using User Define Model in addition to default.lib provided by EMTDC we verify the correctness of developed IEEET3 model with PSS/E and EMTDC simulation results for the same test system.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2003년도 춘계학술대회 논문집 전기기기 및 에너지변환시스템부문
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• pp.395-398
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• 2003

This study presents wrong hand calculations for fault analysis at field on the real AC railway system. Hence, we correctly revised the hand calculations. We propose AC railway system model by using EMTDC. Fault studies are performed. We also compare revised hand calculations with EMTDC simulation to verify the proposed model made by EMTDC. So, we can confirm that the model made by using EMTDC is correctly designed.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2015년도 제46회 하계학술대회
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• pp.157-158
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• 2015

본 논문은 직렬 보상 커패시터 사용으로 인해 발생될 수 있는 SSR(Subsynchronous Resonance) 현상을 해석하기 위한 도구로서 EMTDC의 활용에 관해 다루고 있다. EMTDC를 이용한 순시치 기반의 계통 해석은 주파수 스캔이나 Eigenvalue 계산법의 한계를 보완할 수 있다. EMTDC 기반 해석의 효용성을 검증하기 위해 IEEE 2nd Benchmark 모델을 PSCAD/EMTDC로 구현하였고, 시뮬레이션을 통해 유도 발전기 효과와 비틀림 상호작용 및 축 토크 증폭 현상을 검증했다. 또한, SSR의 억제 수단으로 SVC와 보조제어기를 발전기단에 투입하였고, 그 억제 효과를 시뮬레이션으로 검증하였다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2001년도 추계학술대회 논문집 전력기술부문
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• pp.282-285
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• 2001

In general, the PSS/E program based on RMS mathematical models is used for analyzing the steady state and transient stability phenomena of full-scale large power system. Whereas, the EMTDC program unlike PSS/E, studies the specific reduced small-scale power systems as a basis of instantaneous value mathematical models and used to analyze the Electro-Magnetic transient characteristics. The PSS/E provides various control models such as exciter, governor, PSS models and TGOV5 model but there are few control models in EMTDC. In this paper, we developed EMTDC model for TGOV5 of a steam turbine and boiler which represents governor action, main, reheat and low-pressure effects, including boiler effects. The EMTDC model is developed by examining PSS/E control block and using User Define Model(UDM) in addition to default.lib provided by EMTDC. We verify the correctness of developed TGOV5 model with PSS/E and EMTDC simulation results using Governor Step(GSTEP) method.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2001년도 하계학술대회 논문집 A
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• pp.71-74
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• 2001

In general, the PSS/E program based on RMS mathematical models is used for analyzing the steady state and transient stability phenomena of full-scale large power system. Whereas, the EMTDC program unlike PSS/E, studies the specific reduced small-scale power systems as a basis of instantaneous value mathematical models and used to analyze the Electro-Magnetic transient characteristics. The PSS/E provides various control models such as exciter, governor and PSS models, But there are few control models in EMTDC. In this paper, we developed EMTDC models for governor which have been applied in KEPCO system. The EMTDC models are developed by examining PSS/E control block and using User Define Model in addition to default.lib provided by EMTDC. we verify the correctness of developed governor models with PSS/E and EMTDC simulation results using Governor Step(GSTEP) method.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2001년도 춘계학술대회 논문집 전력기술부문
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• pp.120-122
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• 2001

PSCAD/EMTDC is a well-known simulation program for electromagnetic transients phenomena. This paper deals with the development of highly varying load models using PSCAD/EMTDC, and the simulation results illustrate the model's capabilities.

• 한국초전도ㆍ저온공학회논문지
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• 제8권1호
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• pp.39-44
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• 2006

Before applying HTS power cable to the real utility. system analysis should be carried out by some simulation tools . Hereby the electrical power system analysis is very important for practical use of HTS devices. Nowadays PSCAD/EMTDC simulation tool is one of the most popular and useful analysis tool for the electrical power system analysis. Unfortunately the model component for HTS power cable is not provided in the PSCAD/EMTDC simulation tool In this paper. the EMTDC model component for HTS power cable has been developed considering critical current, critical temperature and recovery time constant that depend on the sorts of HTS wire. The numerical model of HTS Power cable in PSCAD/EMTDC was designed by using the real experimented data obtained from the real HTS 1G wire test. The utility application analysis of HTS power cable was also performed using the developed model component and the parameters of the real utility network in this study. The author's got good results. The developed model component for HTS power cable could be variously used when the power system includes HTS power cable, especially it will be readily analyzed by PSCAD/EMTDC in order to obtain the data for the level of fault current power flow, and power losses, and so on.