• 전력전자학회:학술대회논문집
• /
• 전력전자학회 2000년도 전력전자학술대회 논문집
• /
• pp.22-25
• /
• 2000

This paper introduces the ship propulsion system in different aspects. In fact there are many types to accomplish electric propulsion. The latest installations are based on fixed generator speed and motor speed control. The AC motor drive systems with synchroconverter cycloconverter PWM converter are chosen for the ship electric propulsion. The configurations of the ship electric propulsion. The configurationso of the ship electric propulsion system must be considered about following criteria : torque and speed performances redundancy cost harmonics available space and shape. This paper introduces possible configurations of the ship electric propulsion and the major and minor points.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 2011년도 제42회 하계학술대회
• /
• pp.864-865
• /
• 2011

Battery Disconnecting System (BDS) is the important equipment in electric vehicle system. Therefore, most of electric vehicle companies, i.e. Hyundai Motors, Renault Motors, General Motors, want to have the reliability of 15 years - 150, 000 miles. Recently, reliability prediction through Siemens Norm SN 29500 is considered without testing. In this paper, we will introduce the standard and various input parameters. Also the case study will be shown for BDS. Prediction model is constructed by listing all the components of BDS. It calculates the $\pi$ factors for each components using the conversion equation in the standard and converts the reference failure rates to the expected operating failure rates. According to the result, the parts which will be improved are EV-Relays.

• 조명전기설비학회논문지
• /
• 제26권9호
• /
• pp.18-25
• /
• 2012

Recently, the depletion of fossil fuel carbon dioxide emissions due to limitations in the internal combustion engine vehicles is rising concern about electric vehicle. Neighborhood Electric Vehicle(NEV) is maximum speed 60km/h and one day driving distances less than 80km. In this paper, Power Conversion Controller is proposed for Neighborhood Electric Vehicle. To verify the developed Power conversion Controller, Test performed integration test, max load, power density, efficiency. Confirmed that the vehicle can be applied.

• 조명전기설비학회논문지
• /
• 제27권8호
• /
• pp.90-97
• /
• 2013

In recent years, the many electric saving methods are studied because of difficulty of meeting the demand. The electric energy management such as monitoring of branch power consumption, demand control, metering, power quality monitoring, electric safety monitoring can make energy saving. The purpose of this paper is to develop a system which can provide the integrated management of various functions required for energy management by consumers. In this system all functions which were embodied into each devices are integrated into intelligent meter. The developed systems are tested and implemented by installing at consumer electric distribution panel.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 2006년도 제37회 하계학술대회 논문집 D
• /
• pp.1875-1876
• /
• 2006

국내 원자력발전소에 사용되는 터빈제어시스템은 1980년대 초반에 설치되어 아날로그 제어 방식이 많이 채택되어있으며, 급속한 기술의 발달에 힘입어 현재는 신뢰성이 향상된 디지털 삼중화 제어 방식으로 개조되고 있다. 본 논문에서는 이런 변화에 맞추어 국내 한 원자력발전소에 설치된 터빈제어시스템을 개조하게 되었으며 여기에 필요한 터빈운전 감시 및 조작시스템의 구성 및 기능에 대해서 소개하고자 한다.

• 한국원자력학회:학술대회논문집
• /
• 한국원자력학회 1998년도 춘계학술발표회논문집(2)
• /
• pp.441-446
• /
• 1998

As for safety assessment of a radioactive waste disposal facility, radiation dose to inadvertent intruders is evaluated according to scenarios related to intruder's postulated activities at the disposal site after the end of Institutional Control Period(ICP). Simple trench and Below Ground Vault(BGV) are considered for this study as alternative disposal systems, and different scenarios are applied to each disposal type. The results show that 300 years of ICP is needed for simple trench and 100 years for BGV. Even for BGV, concentration of long-lived radioactive nuclides should be limited considering degradation of BGV after 300 years.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 2002년도 추계학술대회 논문집 전력기술부문
• /
• pp.15-19
• /
• 2002

To provide a specified power quality under electric market system is becoming an important issue for customers and utility company. However, there is no realistic infra-structure to design a power system for the specified power quality. Present electric market is operating under the economic point of view. The low price could be attractive. but the effect of low price and low power quality for the long time should be considered for the system safety. This paper presents a model which conceptualize the dynamic power quality control mechanism to minimize total cost of a society which is affected electric power quality. This model aims to produce a basic infra-structure to balance cost and quality under the electric market system.

• 기술사
• /
• 제34권5호
• /
• pp.40-43
• /
• 2001

상암동 월드컵 주정기장은 축구 전용경기장으로서 2002년 월드컵 축구경기를 위한 꿈과 감동의 라이브 스테이지로서의 스타디움 시설로 각종 국내외 축구경기는 물론 문화행사를 효율적으로 운영할 수 있도록 계획되었다. 이에 효율적인 경기장 시스템 구성과 적정한 전기시설물 설치로 최상의 경기운영을 할 수 있도록 전력시스템을 안정화 하였으며, 월드컵 경기 이후 스포츠공간과 상업시설, 공공시설 등 복합화된 스포츠 문화시설에 부합할 수 있도록 수변전 설비 및 방재센타 등을 다분화하여 시설하였으며 국제적 행사의 장에 전기인으로서 일익을 담당할 수 있었음에 감사한 마음이다.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 1996년도 하계학술대회 논문집 B
• /
• pp.1164-1166
• /
• 1996

This system is an unified Digital Generator Controller. It has an Electronical Generator Sequencer which control the sequence of a generator, an AVR(Automatic Voltage Regulator) which perform the regulation of generator terminal voltage optimally to user's needs, and an Auto Synchronizer, it can switch the power source on from generally used an the generator to load automatically. It also possesses a Battery Charger which charge a storage battery to appropriate voltage level. Here we describe it's configuration, specifications, the way of control, figure, functions and waveforms.

• 제어로봇시스템학회논문지
• /
• 제5권5호
• /
• pp.550-557
• /
• 1999

This paper describes a road-following controller using the proposed neural network for autonomous vehicle. Road-following with visual sensor like camera requires intelligent control algorithm because analysis of relation from road image to steering control is complex. The proposed neural network, relative similarity modular network(RSMN), is composed of some learning networks and a partitioniing network. The partitioning network divides input space into multiple sections by similarity of input data. Because divided section has simlar input patterns, RSMN can learn nonlinear relation such as road-following with visual control easily. Visual control uses two criteria on road image from camera; one is position of vanishing point of road, the other is slope of vanishing line of road. The controller using neural network has input of two criteria and output of steering angle. To confirm performance of the proposed neural network controller, a software is developed to simulate vehicle dynamics, camera image generation, visual control, and road-following. Also, prototype autonomous electric vehicle is developed, and usefulness of the controller is verified by physical driving test.