• Title/Summary/Keyword: Power Manage System

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Z-score Based Abnormal Detection for Stable Operation of the Series/Parallel-cell Configured Battery Pack (직병렬조합 배터리팩의 안전운용을 위한 Z-score 기반 이상 동작 검출 방법)

  • Kang, Deokhun;Lee, Pyeong-Yeon;Kim, Deokhan;Kim, Seung-Keun;Kim, Jonghoon
    • The Transactions of the Korean Institute of Power Electronics
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    • v.26 no.6
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    • pp.390-396
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    • 2021
  • Lithium-ion batteries have been designed and used as battery packs with series and parallel combinations that are suitable for use. However, due to its internal electrochemical properties, producing the battery's condition at the same value is impossible for individual cells. In addition, the management of characteristic deviations between individual cells is essential for the safe and efficient use of batteries as aging progresses with the use of batteries. In this work, we propose a method to manage deviation properties and detect abnormal behavior in the configuration of a combined battery pack of these multiple battery cells. The proposed method can separate and detect probabilistic low-frequency information according to statistical information based on Z-score. The verification of the proposed algorithm was validated using experimental results from 10S3P battery packs, and the implemented algorithm based on Z-score was validated as a way to effectively manage multiple individual cell information.

Development of High Efficiency DC-DC Converter Circuit Topology for Renewable Energy Application (신재생에너지 연계용 고효율 승압형 DC-DC Converter 회로 토폴로지 개발)

  • Jung, Tae-Uk;Kim, Ju-Yong
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.24 no.1
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    • pp.105-111
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    • 2010
  • This article studies the design of DC-DC Converter to convert low-voltage energy sources generated from renewable power like battery power, photovoltaic power, or fuel cells into high-voltage ones. The circuit topology of H-bridge Converter to convert input voltage, 24[V], into out voltage, 400[V], was realized through applying phase shift angle control so as to manage electric power and voltage in the output side. The advantages of the converter system suggested are the low cost as well as current stress reduction, high efficiency, reliability, and simplified maintenance. It is also found that the system is highly useful to produce residential electric power.

Study on Power Control and Optimal Management for Dog-Horse Robot (견마로봇의 전력제어 및 최적 운용에 대한 연구)

  • Kang, Tae-Ha;Huh, Jin-Wook;Kim, Jun;Kang, Sin-Cheon
    • Journal of the Korea Institute of Military Science and Technology
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    • v.13 no.3
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    • pp.343-348
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    • 2010
  • Recently, unmanned electric vehicles are increasingly interested among all of the world since they can provide low exhaust gas, high efficiency and high mobility. To exploit their silent maneuver and high mobility, unmanned electric vehicles have been developed since early 1980's for military. However, it is not easy to design and control a power system satisfying operating duration and mobility performance requirements based on various mission profiles for military use under the conditions of limited space and weight. Moreover it is also necessary to prevent over-charge, over-discharge and voltage unbalance between cells of battery to secure high voltage battery which is serially connected with muti-cells. In this paper, we presents power control and optimal management method for the dog-horse robot which adopts a electric power system and suggests a guide-line to manage and control to secure high voltage battery.

The Traceabailty Method of Standard for Urban Transit Facilities (도시철도시설 표준화기준 추적성 관리방안 연구)

  • Lee, Woo-Dong
    • Proceedings of the KSR Conference
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    • 2008.06a
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    • pp.1549-1552
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    • 2008
  • Urban transit consists of signaling system, railway systems, power facilities systems and the other complicated facilities and the standards notify the standardizations, safety standards, performance standards and quality certification standards according to the Urban Transit Act. The government notifies and recommends these standards to improve the performance, safety and maintenance efficiency of urban transit. Now, we need to manage the records and traceability of the standards because they have reciprocal relations with the others so that, if some standards have been changed it could make some problems to the others. As a result, in this research, we suggest the way to manage the traceability of the standards by using the computation support tools.

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The Management Schema for Urban Transit Standardization Project (도시철도 표준화사업의 효율적인 스키마 구축방안 연구)

  • Lee, Woo-Dong
    • Proceedings of the KSR Conference
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    • 2008.11b
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    • pp.2065-2069
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    • 2008
  • Urban transit consists of signaling system, railway systems, power facilities systems and the other complicated facilities and the standards notify the standardizations, safety standards, performance standards and quality certification standards according to the Urban Transit Act. The government notifies and recommends these standards to improve the performance, safety and maintenance efficiency of urban transit. Now, we need to manage the records and traceability of the standards because they have reciprocal relations with the others so that, if some standards have been changed it could make some problems to the others. As a result, in this research, we suggest the way to manage the traceability of the standards by using the computation support tools.

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A study on the Power Characteristics of Hybrid Power System by Active Power Management (능동전력제어에 의한 하이브리드 동력시스템의 출력특성 연구)

  • Lee, Bohwa;Park, Poomin
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.44 no.9
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    • pp.833-841
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    • 2016
  • The 200 W electrically powered unmanned aerial vehicle, which is studied in this research, uses solar cells, a fuel cell and batteries as the main power source simultaneously. The output of each power source performs power control for each power source by the active power control method so that an adequate capacity of the battery could be maintained while limiting the maximum output of the fuel cell. The output variation for each power source under the active power control method was identified through an integrated ground test. In addition, the effect of limiting the maximum output of the fuel cell on the output variation of the entire system was experimentally identified, and it was confirmed that the adequate maximum output value of the fuel cell for preventing the overdischarge of six series-connected, small size batteries for fuel cell systems is 150 W.

Development of a System-Independent Mobile Smart Shelter using Solar Energy (태양광 에너지를 이용한 계통 독립형 이동식 스마트 쉼터 개발)

  • Joo, Jong-Yul;Lee, Young-Jae;Park, Kyoung-Wook;Oh, Jae-Chul
    • The Journal of the Korea institute of electronic communication sciences
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    • v.15 no.6
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    • pp.1061-1068
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    • 2020
  • This paper presents a system-independent mobile smart shelter using solar energy technology that can be freely installed in various places, such as parks, countryside, event area, construction area and walking tour places where the system power are difficult to use. The proposed smart shelter is equipped with solar power generation and energy storage devices that is combined with IoT technology to collect indoor and outdoor humidity, fine dust and tourist awareness in real time. It is possible to efficiently manage energy by performing the optimal energy operation during the heat- wave, cold-wave situation and the presence of travelers and it is possible to serve as a shelter for as long as possible without system power.

A Study for Space-based Energy Management System to Minimizing Power Consumption in the Big Data Environments (소비전력 최소화를 위한 빅데이터 환경에서의 공간기반 에너지 관리 시스템에 관한 연구)

  • Lee, Yong-Soo;Heo, Jun;Choi, Yong-Hoon
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.13 no.6
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    • pp.229-235
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    • 2013
  • This paper proposed the method to reduce and manage the amount of using power by using the Self-Learning of inference engine that evolves through learning increasingly smart ways for each spaces with in the Space-Based Energy Management System (SEMS, Space-based Energy Management System) that is defined as smallest unit space with constant size and similar characteristics by using the collectible Big Data from the various information networks and the informations of various sensors from the existing Energy Management System(EMS), mostly including such as the Energy Management Systems for the Factory (FEMS, Factory Energy Management System), the Energy Management Systems for Buildings (BEMS, Building Energy Management System), and Energy Management Systems for Residential (HEMS, Home Energy Management System), that is monitoring and controlling the power of systems through various sensors and administrators by measuring the temperature and illumination.

A Study on the Participation of Virtual Power Plant Based Technology Utilizing Distributed Generation Resources in Electricity Market (분산발전자원을 활용한 가상발전소 기반 기술의 전력시장 참여 방안에 대한 연구)

  • Lee, Yun-Hwan
    • The Transactions of the Korean Institute of Electrical Engineers P
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    • v.65 no.2
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    • pp.94-100
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    • 2016
  • A virtual power plant (VPP) technology is a cluster of distributed generation installations. VPP system is that integrates several types of distributed generation sources, so as to give a reliable overall power supply. Virtual power plant systems play a key role in the smart grids concept and the move towards alternative sources of energy. They ensure improved integration of the renewable energy generation into the grids and the electricity market. VPPs not only deal with the supply side, but also help manage demand and ensure reliability of grid functions through demand response (DR) and other load shifting approaches in real time. In this paper, utilizing a variety of distributed generation resources(such as emergency generator, commercial generator, energy storage device), activation scheme of the virtual power plant technology. In addition, through the analysis of the domestic electricity market, it describes a scheme that can be a virtual power plant to participate in electricity market. It attempts to derive the policy support recommendation in order to obtain the basics to the prepared in position of power generation companies for the commercialization of virtual power plant.

PSI/ISI Data Management System by using Personal Computer in Nuclear Power Plant (퍼스널 컴퓨터를 이용한 원자력발전소의 가동전.중 검사자료 관리 체제 전산화)

  • Song, S.J.;Sim, C.M.
    • Journal of the Korean Society for Nondestructive Testing
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    • v.9 no.2
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    • pp.67-72
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    • 1989
  • In nuclear power plants, nondestructive examinations(NDE) plays an important role in ensuring the integrity and reliability operation. As the number of plants and operational time increased, manual handling of voluminous data associated with PSI/ISI(preservice/inservice inspection) could result in many errors or mistakes in writing the examination plan or other reports. Several new approaches to process the data have been attempted and DBMS(Data Base Management System) has been well known concept with a faster and more accurate data processing. This paper proposes an application program, called NDTSYS designed with DBMS in micro computer. The program could be used for a tool to add new records to a data base, change existing records, delete records and request reports with the data base. It would be helpful to the user who manage the PSI/ISI data with minimal time and effort.

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