• 제목/요약/키워드: 3-parallel operation

검색결과 353건 처리시간 0.028초

다른 정격용량을 가진 3상 UPS 시스템의 병렬운전을 위한 주종제어 기법 (A Master and Slave Control Strategy for Parallel Operation of Three-Phase UPS Systems with Different Ratings)

  • 이우철;현동석
    • 전력전자학회논문지
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    • 제9권4호
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    • pp.341-349
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    • 2004
  • 본 논문에서는 전체 시스템의 용량 증대와 부하 중요도에 따른 신뢰성 향상을 위해 사용되는 UPS 병렬 운전시 발생하는 문제점을 해석하고, 이를 해결하기 위해 기존에 연구되어온 다양한 제어기법들을 조사하였다. 또한 기존의 연구방법에서 적용할 수 없었던 다른 정격의 병력 운전 적용시 L, C 출력필터에 의한 문제점을 해결하기 위해 주종 제어를 이용한 3상 UPS의 전류 분달 제어기법이 연구되었다. 제안된 제어 알고리즘의 타당성을 검증하기 위해 시뮬레이션 및 실험을 수행하였다.

1.5MVA급 중용량 인버터용 IGBT 및 Stack 병렬 운전 연구 (The Study of the IGBT and Stack Parallel Operation for the 1.5MVA Medium Power Inverter)

  • 박건태;정기찬;김연달;정명길;김두식
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2004년도 전력전자학술대회 논문집(1)
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    • pp.402-405
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    • 2004
  • In this paper, the parallel operation of the IGBT and power stack for easy capacity enlargement series in the medium power capacity inverter system of the 660V voltage class is described. The parallel operation of the IGBT and power stack for 1.5MVA medium power inverter system's design is applied. The results of the parallel operation are described in this paper. The designed stack capacity for parallel operation is 800kVA class. For 1.5MVA inverter system, the 800kVA stack is applied with 2 parallel configurations. The 800kVA stack is designed with 3 parallel configurations of the IGBT Module. In this paper, the feasibility for easy capacity enlargement series in the medium power inverter by applying the parallel operation of the IGBT and power stack is verified. The experimental results show the good characteristics for the parallel operation of the IGBT and power stack.

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Design of an LCL-Filter for Three-Parallel Operation of Power Converters in Wind Turbines

  • Jeong, Hae-Gwang;Yoon, Dong-Keun;Lee, Kyo-Beum
    • Journal of Power Electronics
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    • 제13권3호
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    • pp.437-446
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    • 2013
  • This paper proposes a design scheme for an LCL-filter used for the three-parallel operation of the power converters in high-capacity wind turbines. The designs of the power devices and grid connected filter are difficult due to the high level voltages and currents in huge-capacity wind turbines. To solve these problem, this paper presents three-parallel operation and LCL-filter design techniques optimized by parallel operation. Furthermore, the design of an inverter side inductance of the LCL-filter is discussed in detail considering the switching modulation method. Simulation and experimental results demonstrate the validity of the designed filter and wind turbines.

빌딩용 DC 배전 시스템의 병렬 운전 시 발생하는 순환전류를 저감시키기 위한 제어 기법 (Control Method for Reducing Circulating Current in Parallel Operation of DC Distribution System for Building Applications)

  • 김학성;신수철;이희준;정철호;한동우;원충연
    • 전력전자학회논문지
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    • 제18권3호
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    • pp.256-262
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    • 2013
  • In the large system such DC distribution for building, the method that a number of modules converters operation in parallel is commonly used. When parallel operation, circulating current is directly related to the loss of the entire system. Accordingly, each module to share the same current is the most important for the safety of the power system. In this paper, control method for reducing circulating current in parallel operation is proposed. furthermore response and operation of steady-state with parallel system was verified by simulation and experiment results.

Droop Control을 이용한 3상 4선식 UPS의 병렬운전 (Parallel Operation of Three-Phase Four wire UPS using Droop Control)

  • 김현섭;한정호;송중호
    • 조명전기설비학회논문지
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    • 제27권4호
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    • pp.88-95
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    • 2013
  • A new droop control method which can be applied to 3-phase 4-wire uninterruptible power supply is proposed in this paper. The droop control method for parallel operation is very attractive one as UPS parallel operation can be carried out without any data communication devices provided among UPS systems connected, but it reportedly shows a PnP(plug-and-play) problem. A basic reason why a circulating current could flow among parallel-connected UPS systems is clearly investigated as well when droop-controlled-ups systems are operated in the manner of PnP. The proposed algorithm is deduced from the investigated result and is basically structured to keep a balanced frequency and balanced voltage profile against power variation. This paper shows that balanced parallel operation of droop control method can be obtained under unbalanced load as well as balanced load conditions when PnP operation is needed and load change occurs.

A Feasibility Design of PEMFC Parallel Operation for a Fuel Cell Generation System

  • Kang, Hyun-Soo;Choe, Gyu-Yeong;Lee, Byoung-Kuk;Hur, Jin
    • Journal of Electrical Engineering and Technology
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    • 제3권3호
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    • pp.408-421
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    • 2008
  • In this paper, the parallel operation for a FC generation system is introduced and designed in order to increase the capacity for the distributed generation of a proton exchange membrane fuel cell (PEMFC) system. The equipment is the type that is used by parallel operated PEMFC generation systems which have two PEMFC systems, two dc/dc boost converters with shared dc link, and a grid-connected dc/ac inverter for embedded generation. The system requirement for the purpose of parallel operated generation using PEMFC system is also described. Aspects related to the mechanical (MBOP) and electrical (EBOP) component, size, and system complexity of the distributed generation system, it is explained in order to design an optimal distributed generation system using PEMFC. The optimal controller design for the parallel operation of the converter is suggested and informative simulations and experimental results are provided.

병렬 연결된 다수 대 계통연계형 인버터를 위한 단독운전 방지 기법 (The Anti-islanding Scheme for a Number of Grid-connected Inverters Under Parallel Operation)

  • 김동균;조상윤;이영권;최익;최주엽
    • 한국태양에너지학회 논문집
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    • 제37권3호
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    • pp.13-22
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    • 2017
  • Anti-islanding scheme of grid-connected inverter is a key function of standards compliance, since unintentional islanding results in safety hazards, reliability, and many other issues. Therefore, many anti-islanding schemes have been researched, however, most of them have problems, which deteriorate performance of islanding detection under parallel-operation. Therefore, this paper proves the reason of problems and proposes a new anti-islanding scheme that has precise islanding detection under parallel-operation in single-phase and three-phase system. Finally, both simulation and experimental result validate the proposed scheme.

모듈형 3상 무정전 전원장치의 병렬 운전을 위한 주종 제어 알고리즘 (A Master and Slave Control Algorithm for Parallel Operation of Modular 3-Phase UPS System)

  • 이태영;조영훈;임승범;안창헌
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2016년도 전력전자학술대회 논문집
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    • pp.479-480
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    • 2016
  • This paper introduces a master and slave control algorithm for parallel operation of UPS system. If each module of UPS system control the output voltage and filter inductor current in parallel operation, it occur unbalanced output power each module. To operate UPS system parallel, it need a algorithm that control output power of modules. A master and slave control algorithm is helpful to balance output power of modules by controlling output current. The effect of a master and slave control algorithm is proved by simulations.

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3[kw]급 태양전지 가상구현시스템의 병렬운전 (Parallel operation of VISC system for 3[kw] solar cell)

  • 이상용;정병환;오방원;이병인;최규하
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2003년도 춘계전력전자학술대회 논문집(2)
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    • pp.957-960
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    • 2003
  • Many solar cell way need to be connected by series or parallel to extract the high power Especially, during parallel operation to reduce circulation current the individual converter has to share and control the load current. Generally, Current Sharing(CS) can be implemented using droop and active current sharing method. In this paper, one 3[KW] PWM converter was replaced as one 3[KW] solar cell array(3 parallels, each parallel has twenty single modules), two 3[KW] solar cell way Is Paralleled to generate 6[KW] power. Also each converter used voltage-current controller and Automatic MSCPM(Master-Slave Current-programming Method) for current sharing(AS).

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다병렬 직류배전 시스템의 DC전류 드룹 제어를 이용한 서로 다른 3상 AC/DC컨버터의 병렬운전기법 (The Parallel Operation of Each other three phase AC/DC Converter using DC Current Droop Control for Multi-parallel DC Distribution System)

  • 이희준;홍석진;현승욱;강진욱;김한수;원충연
    • 조명전기설비학회논문지
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    • 제29권6호
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    • pp.42-48
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    • 2015
  • DC distribution system is difficult to compose the single-system because of the capacity restriction of power semiconductors. Therefore, DC Distribution system needs parallel operation of AC/DC converters for increase to system capacity. However, this system generates the circulating current. This paper is reducing the circulating current and safely sharing the load using the proposed DC current droop control method when each other 3-phase AC/DC converter connected. This system confirms through the simulation and experiment. Also, when each other converter of parallel operate. it is compared the response characteristics