• 디지털융복합연구
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• 제9권5호
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• pp.1-9
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• 2011

스마트그리드를 통해 소비자 선택 확대, 전력산업의 미래 변화에 적응과, 신재생에너지원의 사용증가 등의 여러 가지 편익을 도모 할 수 있다. 소비자는 적극적인 수요반응을 통해 시스템의 전반적인 효율성 향상에 기여하며 사업자가 제공하는 더 많은 정보에 기초하여 에너지이용 효율을 제고할 수 있다. 소비자보호를 위한 지능형전력망 정보의 수집, 활용, 보호에 대한 기본적인 법적 조항은 지능형전력망 구축 및 이용 촉진에 관한 법률에 제시되어 있다. 마지막으로 스마트그리드에 대한 소비자의 인식 제고를 위해 스마트그리드 홍보 및 교육 확대가 무엇보다 필요하다. 따라서 스마트그리드 소비자 수용성 제고 방안을 수립해야 한다는 것이다.

• Journal of Power Electronics
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• 제13권3호
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• pp.362-368
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• 2013

Commercial home appliances using remotely controlled systems consume electric power while in standby mode to prepare for receiving a remote turn-on signal. The proposed power system can significantly reduce standby power consumption without increasing cost. Furthermore, since a Electronic Double Layer Capacitor (EDLC) is used as an auxiliary power storage element, the life cycle is longer and system reliability can be better than with existing approaches. When the energy of the EDLC is not sufficient for turning on the appliance, the power system charges the EDLC without affecting the main system. The proposed power system is verified with a commercial LCD TV and a 3.93mW standby consumption is obtained. This standby consumption can be regarded as zero standby equipment according to the IEC-62031 standard.

• 대한전기학회논문지:전력기술부문A
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• 제52권10호
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• pp.616-623
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• 2003

Competition among electric generation companies is a major goal of restructuring in the electricity industry, The trading system in an electricity market has been one of the most important issues in deregulated electricity market. This paper deals with comparisons of the major two types of the trading system: compulsory pool market and bilateral contract market. The two trading systems are compared quantitatively from the viewpoint of consumer's surplus and social welfare, This paper, also, proposes a unified model of Cournot and Bertrand for analyzing the mixed trading system of pool market and bilateral contract market. Nash equilibrium of the unified model is derived by criteria for participating in bilateral contract market. Numerical results from a sample case show that a mixed trading system of pool market and price-competitive bilateral market is beneficial to consumer from the view points of consumer's surplus.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2001년도 Proceedings ICPE 01 2001 International Conference on Power Electronics
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• pp.247-250
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• 2001

This paper presents a simple and cost effective circuit topology of single-ended type high frequency quasi-resonant PWM inverter using IGBTs, which can operate under wide soft switching operation range based on ZCS for main power switch as compared with a conventional active voltage-clamped ZVS-PWM high frequency quasi-resonant inverter developed previously. In principle, this new circuit topology can efficiently operate under a constant frequency PWM control-based power regulation scheme. In particular, it is noted that the zero current soft switching (ZCS) commutation can achieve for the main active power switch. On the other hand, the zero voltage soft switching (ZVS) commutation can also achieve for the auxiliary active power switch. The operating principle of this high-frequency Inverter treated here and its power regulation characteristics are illustrated on the basis of the simulation and feasible experimental results.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2006년도 추계학술대회 논문집 전기기기 및 에너지변환시스템부문
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• pp.125-128
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• 2006

This paper presents a novel type soft switching PWM power frequency AC-AC converter using bidirectional active switches or single phase utility frequency AC-high frequency AC matrix converter. This converter can directly convert utility frequency AC (UFAC, 50Hz/60Hz) power to high frequency AC (HFAC) power ranging more than 20kHz up to 100kHz. A novel soft switching PWM prototype of high frequency multi-resonant PWM controlled UFAC-HFAC matrix converter using antiparallel one-chip reverse blocking IGBTs manufactured by IXYS corp. is based on the soft switching resonance with asymmetrical duty cycle PWM strategy. This single phase UFAC-HFAC matrix converter has some remarkable features as electrolytic capacitor DC busline linkless topology, unity power factor correction and sine-wave line current shaping, simple configuration with minimum circuit components, high efficiency and downsizing. This series load resonant UFAC-HFAC matrix converter, incorporating bidirectional active power switches is developed and implemented for high efficiency consumer induction heated food cooking appliances in home uses and business-uses. Its operating performances as soft switching operating ranges and high frequency effective power regulation characteristics are illustrated and discussed on the basis of simulation and experimental results.

• 디지털융복합연구
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• 제17권3호
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• pp.161-168
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• 2019

전자펜의 소비자 활용도 및 제품 개선점 분석을 위해 Davies(1989)의 TAM 모형을 적용하여 전자펜 사용자들의 지각된 유용성, 이용용이성 및 기대가치를 통한 기술수용의도를 분석하였다. 연구방법으로 기업 설문내용에 기반 한 내용분석법과 고객들의 참여도인 Activity 분석을 통해 전자펜 제품의 기술수용정도와 제품 전략의 개선점을 도출하였다. 연구결과 전자펜의 활용도를 보인 고객들은 30~49세의 남성과 사무직과 연구원으로 나타났으며, 개선사항에 대한 키워드 중심의 내용분석법의 분석결과 전원동작의 개선, App 연계 펜 기능의 확장성, 전자펜의 수정기능, 펜의 데이터인식 기능, 전자펜이 펜으로서의 필기감, 그립감, 펜 굵기 선택 등 세분화 기능의 개선, 타 스마트 기기와의 동기화 개선과 충전기능의 개선 필요성이 추출되었다. 본 연구는 전자펜에 TAM을 적용하여 전자펜이 초기시장에서 주류시장으로 확산되기 위한 제품속성 개선점을 제시하였고 향후 스마트폰이나 아이패드 등 스마트 디바이스와 연계된 전자펜 제품 확산과의 차이점 규명 통해 차별화 된 시사점을 제공할 수 있을 것이다.

• 조명전기설비학회논문지
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• 제27권8호
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• pp.90-97
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• 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.

• 전기전자학회논문지
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• 제23권2호
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• pp.687-694
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• 2019

주택용 전기 소비자는 태양광 발전기를 대여할 수 있고, 만일 감소된 전기요금이 대여료보다 크다면 수익이 발생할 수 있다. 아직까지 수익의 정확한 함수식은 계산되지 않았는데 본 논문에서 계산했다. 두 가지 가정이 있다. 첫 번째는 대여한 태양광 발전기가 월간 300kWh 발전하는 것이고, 두 번째는 태양광 발전기를 대여할 때 일시불로 362300원 지불한다는 것이다. 함수가 구간에 따라 달라지므로 3개의 구간을 가정하고 각 구간에서의 함수를 유도했다. 유도한 함수에 의해서 기본 7년간 월간 전기 사용량 401~1000kWh 사용하는 저압 주택용 전기요금 소비자의 수익률, 회수 시간, 감도를 계산했다. 본 논문에서 계산된 값에 의해서 월간 전기 사용량 401~1000kWh 사용하는 저압 주택용 전기요금 소비자가 3kW 태양광 발전기를 대여할지 말지 결정할 때 중요한 자료다.

• Journal of Advanced Marine Engineering and Technology
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• 제24권5호
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• pp.52-57
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• 2000

Recently large capacity of electric equipment and increasing in atomic power generation are shown. One of the reason is shortage of the electric power supply for air conditioning load during summer. And every consumer is concerning about economical refrigeration and air conditioning system to decreases electric power consumption and decrease in global warming. For these necessities, ice making thermal storage system is required. Therefore, in this paper, the possibility of continuous slurry ice making using flowing organic water solution in cooled circular tube has been investigated. The experiments was carried out under some parameters of concentration and velocity of water solution, temperature of cooled tube wall, and control pressure in tube, As a result, four types of operating conditions in the pipe, that was supercooling, continuous ice making, intermittent ice making and ice blockage, were classified . And it was found that the critical condition for continuous ice making was acquired as a function of these experimental parameters.

• 조명전기설비학회논문지
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• 제28권12호
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• pp.103-107
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• 2014

Together with housings, general buildings and industrial facilities, multi-purpose complexes are equipped with various and special equipment. They are often used by many unspecified people, which causes an increase in annual electricity consumption. Because of this, a great amount of money has been spent for electric charge, far more in excess of the budget, so a reasonable electricity rate needs to be estimated. In this study, we surveyed the power consumption, average power use, and annual electricity bill of multi-purpose complexes in the past five years. To see the general tendency of the survey, we conducted a statistical analysis with such parameters as average, maximum, and minimum values. Through regression analysis, we could see the trend of the survey in linear way. Based on the survey, we have developed an electric-rate calculation program to estimate the next year's budget on electricity.