• Journal of the Korean Society of Marine Environment & Safety
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• v.25 no.1
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• pp.117-121
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• 2019

In this study, research and a demonstration for applying DC distribution systems to ships as an environmental and energy conservation solution in domestic and foreign countries were actively carried out. In order to apply a generator to a DC distribution system, a variable speed engine was used. Both engine speed and fuel consumption were reduced. In this paper, a DC generator for DC distribution was constructed using a diesel generator, a generator controller, a governor, and an AVR. A system configuration method for a generator, power quality test, and the power characteristics of a variable speed generator were analyzed. The voltage (250 - 440 VAC) and frequency (34 - 60 Hz) of the variable speed generator were set to 60 - 100 % of the rated value, and the engine was set to operate from 1100 - 1800 rpm. It was confirmed that the voltage, current, and frequency of the generator output fluctuated in a stable manner according to the power amount when changing the engine speed of the generator according to the load variation.

• Proceedings of the KIEE Conference
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• 2015.07a
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• pp.77-78
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• 2015

For the smooth operation and efficient management of pumped storage power plants, we should be understand a generator, turbine, exciter, governor, and stabilizer and prepare an abnormal accident through an accident simulation by software such as PSCAD, PSS/E. This paper investigates configuration of the generator system of ${\bigcirc}{\bigcirc}$ pumped storage power plant. And describes the modeling and fault simulation studies using PSCAD.

• Proceedings of the Korea Society for Simulation Conference
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• 1999.10a
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• pp.289-293
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• 1999

디지털 기술을 기반으로 한 조속기 제어시스템의 제어 알고리즘에 대한 적합성과 하드웨어의 신뢰성 시험을 위한 다이나믹 테스트 베드를 구축하기 위해 증기 터빈 및 발전기의 특성을 그대로 모사하는 시뮬레이터 및 하드웨어를 개발하였으며, 개발된 시뮬레이터를 사용자(시험자)가 그 기능들을 적절하고 편리하게 사용할 수 있도록 인간공학의 원칙을 반영하여 설계하였다. 이를 위해 시뮬레이터가 가져야 하는 기능들을 시험 절차의 분석을 통해 도출하고 그 기능들을 사용 목적에 따라 적절하게 그룹핑하였으며, 가장 빈번하게 사용하는 Mimic Display의 경우 사용자가 항상 확인 가능하도록 주 화면에 구성한 인간-기계 연계 설계에 대해 소개하고자 한다.

• International Journal of Contents
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• v.1 no.2
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• pp.44-47
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• 2005

One of the most important characteristics in Hollywood movies is that Hollywood movies have created heroes. But, the meaning of heroes in Hollywood movies is different from proto- typical heroes. America has such a short history, so it doesn't have the mythology. It is also consist of multi-race, culture. Thus, America people, especially governor need something that tie up governed people spiritually. Hollywood film industry has responded about this expectation since 1920's. Hollywood film producers have created mythology and hero like the western genre and Rambo. Now days, America, as only super power, wants to spread it's mythology and heroes over the world. That is cultural Imperialism.

• 제어로봇시스템학회:학술대회논문집
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• 1991.10b
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• pp.1839-1844
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• 1991

For a single-input nonlinear system, the transformation which transposes the nonlinear system to a controllable-like canonical system has been proposed. However this method islimited by a single-input system and it is difficult to apply the method actually. In this paper we propose a method which transposes the nonlinear system with multi-input into an equivalent pseudo-linear system. And we apply the pseudo-linear system to a linear optimal regulator. To confirm the effectiveness of the proposed method, a transient stability control of the generator with an excitor and a governor is considered.

• Journal of Advanced Marine Engineering and Technology
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• v.38 no.9
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• pp.1119-1124
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• 2014

This paper describes the emergency situation which occurs in Drilling Rig power system. Especially, we focused on power system transient characteristics on propulsion motor load and generator elimination situation in Drilling Rig operation. We performed numerical simulation and analyzed the result for power system transient stability characteristics on each condition for excitation system and governor control system using ETAP (Electrical Transient Analysis Program).

• 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.

• 전기의세계
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• v.24 no.5
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• pp.97-102
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• 1975

This paper describes the result of a Study for the Optimum Operating method with Spinning reserve in case of outage of large generator unit to improve the system stability and prevent the system frequency drop. This is usually done by governor free operation, so we focused our attention to the operating Char acteristics of spinning reserve. Nexy, a study was made to mesure the upper limit of Spinning reserve and when this upper limit cannot match the required power, a relationship between the amount of spinning reserve and that of the load shedding requirement was searched with regard to several system operating conditions to use it in our future system operation. By this study, the optimum system operating method was recommended for reliable operation of power system.

• Proceedings of the KIEE Conference
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• 1996.11a
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• pp.123-126
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• 1996

In this paper, optimal modulation controller is designed to improve the stability of A.C. and A.C.-D.C. power system, and optimal theory is applied to select optimal modulation controller input signal Optimal modulation controller for speed governor and exciter controller system is constructed in A.C. power system, while the controller is constructed to the both control systems like AC. power system, considering ACR-AVR, APR-$A{\gamma}R$ as the control method of direct current system. It is considered that the stability of A.C. power system only and A.C.-D.C. power system against load fluctuations and disturbances under case of optimal modulation control.

• Proceedings of the KIEE Conference
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• 2001.07d
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• pp.2153-2155
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• 2001

This thesis presents a development of intelligent digital governing system and it's application on Sumjingang Hydro-Power plant. The developed system consists of hardware, software and governing algorithm. The feature of hardware is triplex-modular fail safe redundant system for a safe turbine running. The software consists of operating system and application program. The operating system has real-time and multi-tasking features. And also, application algorithm is composed to run francis type hydro-turbine. The developed digital governing system is applied to Sumjingang hydro-power plant, Korea Hydro Nuclear Power Corporation.