• Title/Summary/Keyword: Energy Balancing

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Walking test of a quadruped robot with weight balancing oscillator (무게평형진자를 가진 4족 로봇의 보행 실험)

  • 유재명;오상관;김영탁
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2002.05a
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    • pp.446-449
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    • 2002
  • Quadruped walking robot requires dynamic control to keep its stability in high speed walking. To keep its walking stability by control of only legs' Joint angle lowers energy efficiency. It is known that an animal or a human use the moving of the mass center of one's upper body to keep the stability. We have developed a quadruped walking robot with weight balancing oscillator that have high energy efficiency. In this study, walking tests are performed for the robot to verify the validity of the weight balancing oscillator.

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An Active Forward Fly-back Balancing Circuit for Series Connected Supercapacitors

  • Hussain, Asif;Lee, Hak-Jun;Sul, Seung-Ki
    • Proceedings of the KIPE Conference
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    • 2010.07a
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    • pp.228-229
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    • 2010
  • This paper presents an active voltage balancing approach using a forward fly-back power converter. In the proposed balancing scheme, cell with the higher voltage is selected to extract the extra energy and then a proportion of this extracted energy is distributed to other supercapacitors via the proposed circuit. A system structure consisting of five supercapacitors is built up to verify operation of the proposed scheme.

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4-Channel LED Current Balancing Scheme Using C-Fed Hybrid Quasi-Z-Source Converter (전류형 하이브리드 Quasi-Z-Source 컨버터를 이용한 4-채널 LED 전류 밸런싱 기법)

  • Hong, Daheon;Cha, Honnyong
    • The Transactions of the Korean Institute of Power Electronics
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    • v.26 no.1
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    • pp.66-73
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    • 2021
  • This study presents a novel four-channel light-emitting diode (LED) current balancing topology using a current-fed hybrid quasi-Z-source converter. With the proposed structure, currents flowing through four LED strings are automatically balanced owing to the charge (amp-sec) balance condition on capacitors. Thus, automatic current balancing of the proposed driver is simple and precise. In addition, the proposed LED driver uses only one active switch and three diodes. The operating principle and characteristics of the proposed four-channel LED driver are analyzed in detail. To verify the operation of the proposed LED driver, a prototype is built and tested with different numbers of LEDs.

Implementation of Linux Virtual Server Load Balancing in Cloud Environment (클라우드 환경에서 Linux Virtual Server 로드밸런싱 구현)

  • Seo, Kyung-Seok;Lee, Bon-Hwan
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2012.10a
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    • pp.793-796
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    • 2012
  • Recently adoption of the Green IT is regarded as an essential element in order to decrease server heat and save energy in data center because of continuous increase of energy consumption and energy price. Consequently the conventional IT infrastructure is replaced with cloud computing platform. In this paper, we have implemented a Linux virtual server load balancing in open source-based cloud platform and the performance of the LVS load balancing is analyzed.

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A Study on the Accounts Balancing Time of Small Distributed Power Trading Platform Using Block Chain Network (블록체인 네트워크를 이용한 소규모 분산전력 거래플랫폼의 정산소요시간에 관한 연구)

  • Kim, Young-Gon;Heo, Keol;Choi, Jung-In;Wie, Jae-Woo
    • Journal of Energy Engineering
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    • v.27 no.4
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    • pp.86-91
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    • 2018
  • This paper is a review of accounts balancing time in small distributed power trading platform using blockchain technology. First, the national VPP energy management system using the AMI applied to this study is introduced and then the accounts balancing time and process of the cryptocurrency coin payment which based on the power generation of pro-consumer certified by power big data analysis in a test bed environment is discussed. Futhermore the configuration of a power Big Data analysis system with GPU Fast Big Data that applies MapD to current lambda architecture is also introduced.

Balancing of Routing Energy Consumption in Wireless Ad-hoc Networks (무선 Ad-hoc 망에서 라우팅 에너지 소비의 균형 기법)

  • 강용혁;엄영익
    • Proceedings of the Korea Society for Simulation Conference
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    • 2000.11a
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    • pp.97-101
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    • 2000
  • Energy consumption is considered as a principal ingredient in mobile wireless ad-hoc networks. In such a network, most of mobile nodes takes a role in forwarding messages received from neighbor nodes. Energy of these nodes is consumed in different rates depending on message traffic routes. This paper proposes a scheme to balance routing energy consumption by transferring routing function from node with small residual energy to node with enough residual energy. This scheme requires additional local message transfer, increasing the energy consumption of nodes to transfer routing function, and increasing total energy consumption of ad-hoc network. But balancing of energy consumption make the system lifetime the longer and increase the average node lifetime.

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Soft Load Balancing Using the Load Sharing Over Heterogeneous Wireless Networks (이기종 무선 환경에서 Load sharing을 이용한 Soft Load Balancing 기술)

  • Son, Hyuk-Min;Lee, Sang-Hoon;Kim, Soo-Chang;Shin, Yeon-Seung
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.33 no.7A
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    • pp.757-767
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    • 2008
  • Start Ongoing next generation networks are expected to be deployed over current existing networks, in the form of overlayed heterogeneous networks, in particular, in hot spot areas. Therefore, it will be necessary to develop an interworking technique such as load balancing, to achieve increased overall resource utilization in the various heterogeneous networks. In this paper, we present a new load balancing mechanism termed 'soft' load balancing where the IP(Internet Protocol) traffic of a user is divided into sub-traffic, each of which flows into a different access network. The terminology of soft load balancing involves the use of both load sharing and handover techniques. Through a numerical analysis, we obtain an optimal LBR (Load Balancing Ratio) for determining the volume of traffic delivered to each network over an overlayed multi-cell environment. Using the optimal LBR, a more reliable channel transmission can be achieved by reducing the outage probability efficiently for a given user traffic.

Power Balancing Method of Energy Storage for Power Quality Improvement of DC Microgrid (DC마이크로그리드의 전력품질향상을 위한 에너지 저장장치의 Power Balancing 제어기법)

  • Kim, Hyun-Jun;Lee, Ji-Heon;Han, Byung-Moon
    • Proceedings of the KIPE Conference
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    • 2011.11a
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    • pp.281-282
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    • 2011
  • 본 연구에서는 DC마이크로그리드의 전력품질을 향상시키기 위한 에너지 저장장치의 Power Balancing 제어기법에 대하여 기술하고 있다. 제안하는 시스템의 동작 타당성을 체계적으로 분석하기 위해 PSCAD/EMTDC 소프트웨어를 이용한 마이크로그리드 모델을 개발하였으며 여러 사례 적용에 대한 모의실험을 통해 제어기법의 타당성을 검증하였다.

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A Study on Power Trading Methods for in a Hydrogen Residential Model (수소주거모델의 전력 거래 참여 방안 고찰)

  • KISEOK JEONG;TAEYOUNG JYUNG
    • Transactions of the Korean hydrogen and new energy society
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    • v.34 no.2
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    • pp.91-99
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    • 2023
  • Participation in power trading using surplus power is considered a business model active in the domestic energy trade market, but it is limited only if the legal requirements according to the type, capacity, and use of the facilities to be applied for are satisfied. The hydrogen residential demonstration model presented in this paper includes solar power, energy storage system (ESS), fuel cell, and water electrolysis facilities in electrical facilities for private use with low-voltage power receiving system. The concept of operations strategy for this model focuses on securing the energy self-sufficiency ratio of the entire system, securing economic feasibility through the optimal operation module installed in the energy management system (EMS), and securing the stability of the internal power balancing issue during the stand-alone mode. An electric facility configuration method of a hydrogen residential complex demonstrated to achieve this operational goal has a structure in which individual energy sources are electrically connected to the main bus, and ESS is also directly connected to the main bus instead of a renewable connection type to perform charging/discharging operation for energy balancing management in the complex. If surplus power exists after scheduling, participation in power trading through reverse transmission parallel operation can be considered to solve the energy balancing problem and ensure profitability. Consequentially, this paper reviews the legal regulations on participation in electric power trading using surplus power from hydrogen residential models that can produce and consume power, gas, and thermal energy including hybrid distributed power sources, and suggests action plans.