• 제목/요약/키워드: power conditioner

검색결과 314건 처리시간 0.023초

Power Flow Control of a Multi-bus/Three-feeder Distribution System Using Generalized Unified Power Quality Conditioner

  • Mohammed, B.S.;Ibrahim, R.;Perumal, N.;Rao, K.S. Rama
    • Journal of Electrical Engineering and Technology
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    • 제10권1호
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    • pp.8-17
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    • 2015
  • This paper analyses the power flow of a three-feeder/multi-bus distribution system by a custom Generalized Power Quality Conditioner (GUPQC). The GUPQC has been realized by three voltage source converters (VSCs) coupled back-to-back through a common DC-link capacitor on the DC-side. One feeder was controlled by the shunt compensator, whereas each of the other two feeders was controlled by the proposed novel series compensator. The GUPQC has the capability to simultaneously compensate voltage and current quality problems of a multi-bus/three-feeder distribution system. Besides that, the power can be transferred from one feeder to other feeders to compensate for poor power quality problems. Extensive simulation studies were carried out by using MATLAB/SIMULINK software to establish the ability of the GUPQC to improve power quality of the distribution systems under distorted supply voltage conditions.

재료비 절감을 위한 병렬구조를 갖는 인버터 에어컨용 역률제어회로 (Power Factor Correction Circuit For Inverter Air-Conditioner With A Parallel Configuration To Reduce The Material Cost)

  • 정용채;정윤철;권경안
    • 전력전자학회논문지
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    • 제4권2호
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    • pp.122-127
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    • 1999
  • 본 논문에서는 3마력의 컴프레샤 모터를 갖는 대용량의 인버터 에어컨의 원가절감과 성능향상을 위해서 병렬구동방식을 사용한 역률제어회로를 제안하였다. 역률개선 LC필터를 제거하고 출력캐패시터와 인버터 스위치의 정격축소를 통해서 재료비를 줄이기 위해서 적절한 설계절차를 제시하였다. 이렇게 결정된 소자를 사용하여 6[kW] 소지전력을 갖는 프로토형 회로를 구성하고 제안된 회로의 동작을 확인하기 위해서 실험을 하였다.

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전력시스템을 위한 서브시스템의 제어 (Control of the Subsystem for a Power System)

  • 이용근
    • 전기학회논문지P
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    • 제58권4호
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    • pp.404-409
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    • 2009
  • A DC power system has many loads with various functions. In particular, these sizable loads take the form of power electronic converters. When they are tightly regulated, the loads appear as constant power loads and result in negative incremental input impedance. Under certain conditions the effect of such loads on the power system is causes instability. In this paper, converter with a large storage capacitor and a lag compensator is proposed as a DC bus conditioner to mitigate the voltage transients on the bus. In addition, the proposed control approach has the advantage of performing both the functions of mitigating the voltage bus transients and maintaining the level of energy stored. Simulation and experimental results showed that the proposed control method was operated well in a small-scale DC power system that contained subsystems with constant power characteristics, such as DC/DC converters and electrical drives.

리튬 배터리를 연계한 100kVA UPQC 개발 및 성능시험 (The Development and Experimental Evaluation of 100kVA Unified Power Quality Conditioner interconnected to the Li-Battery System)

  • 이학주;채우규;박중성;손진만;최은식
    • 조명전기설비학회논문지
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    • 제26권10호
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    • pp.102-110
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    • 2012
  • This paper propose the advanced topology of UPQC, its DC link is connected with Lithium battery, to compensate the momentary interruptions. The proposed system can be operated as UPS mode using the parallel inverter, which control the charge or discharge of battery, in case of the interruption. We dvelop 100kVA UPQC using the proposed topology to rise the power quality and the reliability of Microgrid. We verify its usefulness through voltage compensation test, UPS operation test and etc. using Microgrid test facility.

Custom Power의 전력품질 향상을 위한 PWM Cuk AC-AC 컨버터의 정적 특성 해석 (Static Characteristics Analysis of PWM Cuk AC-AC Converter for Power Quality Improvement of Custom Power)

  • 최남섭
    • 한국정보통신학회:학술대회논문집
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    • 한국해양정보통신학회 2004년도 춘계종합학술대회
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    • pp.513-516
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    • 2004
  • 본 논문에서는 Custom Power의 전력품질 향상을 위한 PWM Cuk AC-AC 컨버터를 제안한다. AC line Conditioner, 위상천이기와 같은 고정주파수 가변전압(WCF:Variable Voltage Constant Frequency)응용에 사용되는 PWM Cuk AC-AC 컨버터를 모델링함에 있어서 복소 회로 DQ 변환을 사용하여 전압이득, 역률과 같은 정적인 특성에 대한 해석적인 식을 구한다. 끝으로, PSIM 시뮬레이션을 통하여 해석과 모델링의 타당성을 보일 것이다.

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A Novel Energy Storage System based on Flywheel for Improving Power System Stability

  • Wu, Jinbo;Wen, Jinyu;Sun, Haishun;Cheng, Shijie
    • Journal of Electrical Engineering and Technology
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    • 제6권4호
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    • pp.447-458
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    • 2011
  • In this paper, a novel flywheel energy storage device, called the flexible power conditioner, which integrates both the characteristics of the flywheel energy storage and the doubly-fed induction machine, is proposed to improve power system stability. A prototype is developed and its principle, composition, and design are described in detail. The control system is investigated and the operating characteristics are analyzed. The test results based on the prototype are presented and evaluated. The test results illustrate that the prototype meets the design requirement on power regulation and starting, and provides a cost-effective and effective means to improve power system stability.

A Simplified Control Algorithm for Three-Phase, Four-Wire Unified Power Quality Conditioner

  • Singh, Bhim;Venkateswarlu, P.
    • Journal of Power Electronics
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    • 제10권1호
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    • pp.91-96
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    • 2010
  • In this paper, a simplified control algorithm for a three-phase, four-wire unified power quality conditioner (UPQC) is presented to compensate for supply voltage distortions/unbalance, supply current harmonics, the supply neutral current, the reactive power and the load unbalance as well as to maintain zero voltage regulation (ZVR) at the point of common coupling (PCC). The UPQC is realized by the integration of series and shunt active filters (AFs) sharing a common dc bus capacitor. The shunt AF is realized using a three-phase, four leg voltage source inverter (VSI) and the series AF is realized using a three-phase, three leg VSI. A dynamic model of the UPQC is developed in the MATLAB/SIMULINK environment and the simulation results demonstrating the power quality improvement in the system are presented for different supply and load conditions.

다중 병렬 부하를 갖는 전기 자동차의 DC 배전 시스템을 위한 Voltage Bus Conditioner의 슬라이딩 모드 제어기 설계 (The design of the Sliding Mode Controller of Voltage Bus Conditioner for a DC Power Distribution System with multiple parallel loads in the Electrical Vehicles)

  • 장한솔;전용성;나재두;김영조;김영석
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2011년도 제42회 하계학술대회
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    • pp.1141-1142
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    • 2011
  • An electrical vehicle (EV) is a huge issue in the automotive industry. The EV have many electrical units: electric motors, batteries, converters, ets. The DC power distribution system (PDS) is essential for the EV. The DC PDS offers many advantages. However, multiple loads in the DC PDS may affect the severe instability on the DC bus voltage. Therefore, a voltage bus conditioner (VBC) may use the DC PDS. The VBC is used to mitigate the voltage transient on the bus. In this paper, sliding mode controller (SMC) is designed for the VBC of DC PDS in the EV. The simulation results by PISM simulation package are presented for validating the proposed control technique.

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DC 배전시스템에서 Voltage Bus Conditioner를 위한 PI 보상기 설계 (The Design of the PI Compensator for a Voltage Bus Conditioner in the DC Distributed Power System)

  • 김영석;석봉준;나재두
    • 전기학회논문지
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    • 제59권12호
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    • pp.2195-2201
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    • 2010
  • The VBC(Voltage Bus Conditioner) is a bidirectional DC-DC converter with the energy storage for damping the instability and any transients of bus voltage in the DC DPS(Distributed Power System). This paper presents the PI(Proportional Integration) controller for the VBC. The PI controller is not only damping the bus transient, but also keeping the storage voltage level. Matlab Simulink simulation and experimental results are presented by validity of the proposed control technique.

에어컨 압축기에 적용된 센서리스 BLDCM의 150도 통전 방법 (150$^{\circ}$ Electrical Conduction Method of Sensorless BLDCM Applied to her Conditioner Compressor)

  • 강용진;유지윤;김대경;이광운;김태덕
    • 전력전자학회논문지
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    • 제9권6호
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    • pp.517-524
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    • 2004
  • 본 논문은 집중권 브러시리스 직류 전동기로 제조된 에어컨 압축기의 효율을 개선할 수 있는 새로운 운전 방법을 제안한다. 일반적으로 에어컨 압축기는 신뢰도 높은 센서리스 운전을 하여야 하기 때문에 복잡한 연산이 필요한 3상 3여자 운전을 적용하기 어렵다. 본 논문에서는 기존의 120도 통전 방법과 동일한 센서리스 알고리즘과 하드웨어를 사용하되 3상 2여자 방식의 제어성능상의 단점을 개선하고 운전 성능이 향상된 새로운 패턴의 통전 방법을 제안한다. 그리고 이를 실부하 에어컨에 적용하여 제안된 운전 방법의 유효성을 검증한다.