• Title/Summary/Keyword: Standby Power

Search Result 236, Processing Time 0.026 seconds

A Study on Current Status Survey and Utilization of Emergency Generator Installation (비상발전기 설치 실태조사 및 활용 방안에 대한 고찰)

  • Lim, Hyun-Sung;Han, Un-Ki;Jung, Jin-Soo;Park, Chan-Eom;Song, Young-Sang;Choi, Jong-Soo
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
    • /
    • v.29 no.10
    • /
    • pp.34-38
    • /
    • 2015
  • Recently, the power supply situation has deteriorated and the plan has issued to utilize of emergency generators for securing standby power. If a part of Emergency Generators was utilized by peak shaving, it can be avoiding over-investment in supply power facility. In this paper we investigate management of Emergency Generator and understand the current situation. So, we verify demand response resource possibility of Emergency Generator.

Secondary Side Regulator for reduced standby power and accurated output voltage regulator control (대기전력저감 및 정확한 출력전압 제어가 가능한 Secondary Side Regulator)

  • Kim, Soo-San;Heo, Tae-Won;Choi, Heung-kyun;Kim, Hugh;Han, Sang-Kyoo
    • Proceedings of the KIPE Conference
    • /
    • 2014.07a
    • /
    • pp.353-354
    • /
    • 2014
  • 본 논문은 대기전력저감 및 정확한 출력전압 제어가 가능한 새로운 방식의 SSR(Secondary Side Regulator) 회로를 제안한다. 제안방식은 기존의 1차 측 IC를 2차 측으로 옮김으로써 기존의 SSR의 장점인 정확한 출력전압의 제어가 가능하다는 점과 포토커플러 및 TL431을 사용하지 않는 방식이므로 대기전력저감 측면에 있어 유리한 장점을 갖는다. 또한 절연된 1-2차 측간 신호전송방법에 있어 사이즈가 작고 가격이 저렴한 CT(Current Transformer)를 사용하여 Pulse edge의 전달을 통해 제어를 한다. 제안회로의 타당성 검증을 위하여 이론적 해석과 10W 급 플라이백 컨버터의 실험결과를 통해 증명하였다.

  • PDF

Single-Inductor, Multiple-Input-Single-Output Converter Based Energy Mixer for Power Packet Distribution System

  • Reza, C.M.F.S.;Lu, Dylan Dah-Chuan;Qin, Ling;Qi, Jian
    • Journal of Power Electronics
    • /
    • v.18 no.5
    • /
    • pp.1479-1488
    • /
    • 2018
  • Power packet (PP) distribution system distributes power to different loads that share the same distribution cable in a packetized form. When compared with conventional power systems, a PP distribution system (PPDS) can reduce standby power, eliminate Point-of-Load (PoL) power conversion, and intelligently control the load demand from the source side. Due to the absence of PoL conversion, when multiple power sources at different voltage levels and conditioning requirements jointly send power to various loads at different voltage ratings, the generated voltage has an irregular shape. A large filter at each of the load sides is required to reduce such a large voltage ripple. In this paper, a single-inductor, multiple-input-single-output converter structure based multiple-energy-source mixer is proposed. It combines PP generation, maximum power point tracking (MPPT) of renewable energy sources (RESs) and filtering at the source side. To demonstrate the possible renewable energy integration, a PV panel is used as a power source together with other constant voltage sources. The PV power is approximately tracked using the constant voltage method and it is used for each of the PP generations. The proposed PP distribution system is experimentally verified and it is shown that a conventional PI controller is sufficient for stable system operation.

Standby Power Saving Mechanism of a Set-Top Box having Standby Mode that Supports Network Interworking (네트워크 연동을 지원하는 대기모드를 가진 셋톱박스의 대기전력 저감 방법)

  • Park, Hyunho;Byon, Sungwon;Jung, Eui Suk;Park, Young-Su;Lee, Yong-Tae;Ryu, Won
    • Proceedings of the Korean Society of Broadcast Engineers Conference
    • /
    • 2015.07a
    • /
    • pp.98-101
    • /
    • 2015
  • 최근, 텔레비전을 시청하지 않는 대기 상태에서의 셋톱박스의 대기 전력이 여타 가전기기의 대기 전력보다 10 배 이상을 상회하고 있어, 셋톱박스의 대기전력 저감은 국가적으로도 관심을 받고 있다. 셋톱박스의 대기전력 저감을 위해 대기상태의 셋톱박스의 최소전력 동작 모드인 수동대기모드가 제안되었지만, 셋톱박스가 수동대기모드에서는 셋톱박스의 업데이트 및 제어가 어려우므로, 셋톱박스의 수동대기모드 활용은 어려울 것이다. 본 논문은 수동대기모드에 가까운 대기전력을 소모하면서도 대기상태에서도 셋톱박스의 업데이트를 제공할 수 있는 망연동수동대기 모드를 정의하고, 망연동수동대기모드를 이용한 셋톱박스의 업데이트를 위한 셋톱박스 제어기법을 제안하고, 이 제어 기법을 위한 셋톱박스와 네트워크의 구조, 기능, 시그널링에 대해 설명한다. 본 논문의 망연동수동대기모드와 제어 방안은 셋톱박스 사업자 측면에서 활용성이 높으므로, 낮은 대기전력을 소모하는 셋톱박스 시장을 활성화하여 국가 및 세계적인 전력 감소에 큰 기여를 할 것이다.

  • PDF

Big Data Analytics for Social Responsibility of ESG: The Perspective of the Transport for Person with Disabilities (ESG 사회적책임 제고를 위한 빅데이터 분석: 장애인 콜택시 운영 효율성 관점)

  • Seo, Chang Gab;Kim, Jong Ki;Jung, Dae Hyun
    • The Journal of Information Systems
    • /
    • v.32 no.2
    • /
    • pp.137-152
    • /
    • 2023
  • Purpose The purpose of this study is to analyze big data related to DURIBAL from the operation of taxis reserved for the disabled to identify the issues and suggest solutions. ESG management should be translated into "environmental factors, social responsibilities, and transparent management." Therefore, the current study used Big Data analysis to analyze the factors affecting the standby of taxis reserved for the disabled and relevant problems for implications on convenience of social weak. Design/methodology/approach The analysis method used R, Excel, Power BI, QGIS, and SPSS. We proposed several suggestions included problems with managing cancellation data, minimization of dark data, needs to develop an integrated database for scattered data, and system upgrades for additional analysis. Findings The results showed that the total duration of standby was 34 minutes 29 seconds. The reasons for cancellation data were mostly use of other modes of transportation or delayed arrival. The study suggests development of an integrated database for scattered data. Finally, follow-up studies may discuss government-initiated big data analysis to comparatively analyze the use of taxis reserved for the disabled nationwide for new social value.

Coordinated Control Strategies with and without Circulating Current in Unified Power Quality

  • Feng, Xing-tian;Zhang, Zhi-hua
    • Journal of Power Electronics
    • /
    • v.15 no.5
    • /
    • pp.1348-1357
    • /
    • 2015
  • Under traditional unified power quality conditioner (UPQC) control, a UPQC series converter (SC) is mainly used to handle grid-side power quality problems while its parallel converter (PC) is mainly used to handle load-side power quality problems. The SC and PC are relatively independent. The SC is usually in standby mode and it only runs when the grid voltage abruptly changes. In this paper, novel UPQC coordinated control strategies are proposed which use the SC to share the reactive power compensation function of the PC especially without grid-side power quality problems. However, in some cases, there will be a circulating current between the SC and the PC, which will probably influence the compensation fashion, the compensation capacity, or the normal work of the UPQC. Through an active power circulation analysis, strategies with and without a circulating current are presented which fuses the reactive power allocation strategy of the SC and the PC, the composite control strategy of the SC and the compensation strategy of the DC storage unit. Both of the strategies effectively solve the SC long term idle problem, limit the influence of the circulating current, optimize all of the UPQC units and reduce the production cost. An analysis, along with simulation andexperimental results, is presented to verify the feasibility and effectiveness of the proposed control strategies.

Analysis of Operating Characteristics in Tidal Power Generation According to Tide Level

  • Hong, Jeong-Jo;Oh, Young-sun
    • International Journal of Contents
    • /
    • v.18 no.1
    • /
    • pp.76-84
    • /
    • 2022
  • Tidal power generation plays a critical role in reducing greenhouse gas emissions. It uses a tidal force generated by gravitational force between the moon, the earth, and the sun. The change of seawater height generates the tide-generating force, and the magnitude of the change is the tide level. The tide level change has the same period as the tide-generating force twice a day, every 29.5 days, every year, and every 18.6 years. Sihwa Lake Tidal Power Station is Korea's first tidal power plant that began commercial power generation in August 2011 and has been accumulating a large volume of data on electricity production, power generation sales, sluice displacement, and tide levels. The purpose of this paper was to analyze the impact of the inefficiency factors affecting production and the tidal level change on tidal power generation and their characteristics using Sihwa Lake Tidal Power's operational performance data. Throughout this paper we show that tidal power generating operation is accurately predicting the trends of magnitude of tidal force to be periodical for each day. determining the drop to initiate the water turbine generator factoring the constraints on the operation of Sihwa Lake, and reflecting the water discharge through the floodgate and water turbine during the standby mode in the power generation plan to be in the optimal condition until the initiation of the next power generation can maximize power generation.

Program and Technical Trends for Standby Power in Smart Electronic Appliances (스마트 가전의 대기전력 프로그램 및 기술 동향)

  • Kim, T.J.
    • Electronics and Telecommunications Trends
    • /
    • v.28 no.2
    • /
    • pp.86-96
    • /
    • 2013
  • 본고에서는, 국내외 대기전력 감소 프로그램 소개를 통해서 스마트 가전 시장의 대기전력 요구사항을 살펴보고, 해당 요구사항을 만족시키기 위한 기술 동향을 분석하고, 장기적인 스마트 가전 소모전력 감소를 위한 기술 방향을 제시하였다. 대기전력 감소 프로그램을 만족하기 위해서는, 전력반도체를 통한 수동대기 상태의 소모전력 감소 기술과 능동대기 상태의 소모전력 감소 기술개발이 동시에 추진되어야 한다. 더불어, 대학 및 연구소를 통한 장기적 지속적인 원천기술 확보와 기업들의 실험적 접근을 제공하는 인프라 구축의 동반 전략과, 더욱 강력한 대기전력 감소 프로그램의 실행을 통해 기술개발의 필요성을 폭넓게 증대시키는 전략적 접근이 바람직하다.

  • PDF

A Study on Power Saving Strategy for Mobile Device (이동형 기기의 전원 절약 기법에 관한 연구)

  • Cho, Young-Seok
    • Proceedings of the Korean Society of Computer Information Conference
    • /
    • 2011.01a
    • /
    • pp.281-282
    • /
    • 2011
  • 본 논문에서는 휴대기기의 설계에서 전원절약기법에 대하여 연구하였다. 기존의 휴대형기기는 기능이 단순하고, 저 성능이였으나 점차 휴대형기기의 성능향상으로 고소비전력화 되고 있다. 본 논문에서는 주처리기와 대기모드 처리기를 사용하는 방안을 제안하고, 비교 검토하였다.

  • PDF

A Study on reduction methode of standby power lose for induction-heating cooker (유도가열 조리기의 대기전력 저감 방법에 관한 연구)

  • Kim, Min-Jo;Ahn, Kang-Soon;Oh, Young-Seung
    • Proceedings of the KIEE Conference
    • /
    • 2008.07a
    • /
    • pp.934-935
    • /
    • 2008
  • 본 논문은 유도가열 조리기 회로에서 대기시 사용되는 전력 절감방법을 제안한다. 고안된 제어 방식은 주 전원 라인에 Relay를 추가하여 대기시 주 인버터 회로 전력 소비를 차단하고, 보조전원으로 사용하는 SMPS의 다출력중 대기시 사용되지 않는 출력들을 Relay를 이용하여 제어함으로써 차단하는 방법이다. 제안된 방법으로 대기시 소비되는 전력을 1W 미만으로 절감하고, 이를 회로에 적용하여 대기전력을 측정하였다.

  • PDF