• 제목/요약/키워드: Power distribution control

검색결과 969건 처리시간 0.036초

철도 차량용 보조전원장치의 병렬 운전을 위한 가상 임피던스 기반의 드룹 제어 (A Modified Droop Control Method for Parallel Operation in Railway Auxiliary Power Supply Based on Virtual Impedance)

  • 안창균;최봉연;강진욱;강경민;이훈;원충연
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2019년도 전력전자학술대회
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    • pp.342-343
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    • 2019
  • This paper explores the power distribution problem of parallel-connected inverter system which supplies auxiliary power for railway facilities. We propose a droop control method which facilities power distribution and restrain of voltage drop by tracking the average power control command by adjusting the virtual impedance. The performance of proposed droop method is verified by the PSIM simulation.

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DSTATCOM의 순시 유효전력 보상을 이용한 선로의 전류 개선 (Improvement of line Current using Instantaneous Real Power Compensation of DSTATCOM)

  • 정수영;김태현;문승일;권욱현
    • 대한전기학회논문지:전력기술부문A
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    • 제51권7호
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    • pp.327-332
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    • 2002
  • In this paper, conventional reactive power compensation is defined and instantaneous real control concept for shunt converters is proposed. This equipment incorporates the compensation function of harmonics at the distribution line by nonlinear load. These methodologies are applied to IEEE 13 distribution system with the modeling of nonlinear load using EMTEDC/PSCAD package. Simulation with EMTDC results presented to confirm that the new approach has better performance than those obtained by controllers based on traditional concepts of reactive power compensation.

Phase Angle Control in Resonant Inverters with Pulse Phase Modulation

  • Ye, Zhongming;Jain, Praveen;Sen, Paresh
    • Journal of Power Electronics
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    • 제8권4호
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    • pp.332-344
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    • 2008
  • High frequency AC (HFAC) power distribution systems delivering power through a high frequency AC link with sinusoidal voltage have the advantages of simple structure and high efficiency. In a multiple module system, where multiple resonant inverters are paralleled to the high frequency AC bus through connection inductors, it is necessary for the output voltage phase angles of the inverters be controlled so that the circulating current among the inverters be minimized. However, the phase angle of the resonant inverters output voltage can not be controlled with conventional phase shift modulation or pulse width modulation. The phase angle is a function of both the phase of the gating signals and the impedance of the resonant tank. In this paper, we proposed a pulse phase modulation (PPM) concept for the resonant inverters, so that the phase angle of the output voltage can be regulated. The PPM can be used to minimize the circulating current between the resonant inverters. The mechanisms of the phase angle control and the PPM were explained. The small signal model of a PPM controlled half-bridge resonant inverter was analyzed. The concept was verified in a half bridge resonant inverter with a series-parallel resonant tank. An HFAC power distribution system with two resonant inverters connected in parallel to a 500kHz, 28V AC bus was presented to demonstrate the applicability of the concept in a high frequency power distribution system.

DSP와 라즈베리 파이를 기반으로 한 스마트 그리드 전력설비의 통신제어장치 설계 방법론 (Design Methodology of Communication & Control Device for Smart Grid Power Facility based on DSP and Raspberry Pi)

  • 오세영;이준혁;이세인;박창수;고윤석
    • 한국전자통신학회논문지
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    • 제16권5호
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    • pp.835-844
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    • 2021
  • 본 논문에서는 스마트 그리드 전력설비 간 통신을 통해 고장구간을 자율적으로 판단, 분리하기 위한 기반기술인 통신제어장치를 설계하였다. 통신제어장치에서 제어모듈은 3상 전압, 전류를 계측할 수 있도록 DSP, 통신모듈은 전력설비 간 통신을 통해 고장구간을 판단, 고장구간 분리를 실현할 수 있도록 라즈베리 파이로 설계되었다. DSP와 라즈베리 간 통신은 SPI 통신방식을 기반으로, 반면에 라즈베리 간 통신은 Wi-Fi 기반으로 설계되었다. 끝으로, 3개의 전력설비 통신제어 장치로 구성되는 성능 평가 시스템을 구축하였으며, 선로 상의 다양한 고장 이벤트들에 대한 모의 검증을 실시하였다. 평가 결과, 모든 시험경우들에 대해서 통신제어장치가 요구된 응답을 보임으로서 통신제어장치 설계 방법론의 유효성을 확인할 수 있었다.

Robust Active Power Control of a Battery-Supported DSTATCOM to Enhance Wind Generation Power Flow

  • Mahdianpoor, Mohammad;Kiyoumarsi, Arash;Ataei, Mohammad;Hooshmand, Rahmat-Allah
    • Journal of Electrical Engineering and Technology
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    • 제12권4호
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    • pp.1357-1368
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    • 2017
  • The lack of controllability over the wind causes fluctuations in the output power of the wind generators (WGs) located at the wind farms. Distribution Static Compensator (DSTATCOM) equipped with Battery Energy Storage System (BESS) can significantly smooth these fluctuations by injecting or absorbing appropriate amount of active power, thus, controlling the power flow of WGs. But because of the component aging and thermal drift, its harmonic filter parameters vary, resulting in performance degradation. In this paper, Quantitative Feedback Theory (QFT) is used as a robust control scheme in order to deactivate the effects of filter parameters variations on the wind power generation power smoothing performance. The proposed robust control strategy of the DSTATCOM is successfully applied to a microgrid, including WGs. The simulation results obviously show that the proposed control technique can effectively smooth the fluctuations in the wind turbines' (WT) output power caused by wind speed variations; taking into account the filter parameters variations (structural parameter uncertainties).

A Novel Photovoltaic Power Generation System including the Function of Shunt Active Filter

  • Park, Minwon;Seong, Nak-Gueon;Yu, In-Keun
    • KIEE International Transaction on Electrical Machinery and Energy Conversion Systems
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    • 제3B권2호
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    • pp.103-110
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    • 2003
  • With significant development of power electronics technology, the proliferation of nonlinear loads such as static power converters has deteriorated power quality in power transmission and distribution systems. Notably, voltage harmonics resulting from current harmonics produced by the nonlinear loads have become a serious problem in many countries. Many photovoltaic power generation systems installed in building systems have harmonics that are the worst object for distribution systems as a utility interactive system, and it tends to spread out continuously. Proposed and implemented in this paper is a multi-function inverter control strategy that allows a shunt active filter function to the power inverter of the photovoltaic power generation system established on a building system. The effectiveness of the proposed system is demonstrated through the simulation of a hypothetical power system using PSCAD/EMTDC.

Micro-grid의 적정전압유지를 위한 자율분산 협조운용 제어알고리즘 (Autonomous Decentralized Coordination Control Algorithm for Keeping the voltage of Micro-grid within a Proper Level)

  • 김재언;신성수;노대석;윤기갑
    • 한국산학기술학회논문지
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    • 제10권1호
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    • pp.81-90
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    • 2009
  • 전력산업의 구조개편과 더불어 분산전원의 배전계통연계운용 및 전력품질이 전력회사의 배전사업자, 구역전기사업자, 전기공급 신뢰도와 밀접한 관계에 있는 산업용 수용가들에게 많은 관심을 불러일으키고 있다. 이러한 주변정세는 차세대의 배전계통이 다수의 Micro-grid들로 구성될 것이라고 하는 예상을 전문가들로부터 제기되기에 이르렀다. 그러나, 제안된 Micro-grid는 몇몇의 분산전원과 전력품질을 보상하는 기기, 그리고 통신제어설비와 부하들로 구성된다는 기본적인 내용에 지나지 않는다 따라서, 본 논문에서는 수용가에 고신뢰 고품질의 전력공급을 가능하게 하는 차세대 전력공급네트워크인 Micro-grid의 적정전압유지를 위한 자율분산협조 운용제어 알고리즘을 제안한다.

배전선로 주변에서의 전자계 분포 해석 (Analysis of Electromagnetic Field Around Distribution Line)

  • 권명락
    • 한국전기전자재료학회논문지
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    • 제30권10호
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    • pp.672-676
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    • 2017
  • Electrical energy is playing an increasingly vital role as the primary energy source in everyday life. With the increase in electric power consumption, power facilities are under an increasing stress and must operate at a high capacity. Consequently, the demand for electric power cables in power transmission and distribution lines is rapidly increasing. Underground distribution lines have been steadily replacing the aboveground lines owing to the increase in electric power demand and the need to increase the supply voltage. In addition to line damage, worker safety is of primary concern in this type of underground infrastructure. In this study, to improve the safety of workers dealing with underground transmission lines, we analyzed the electromagnetic field generated around the distribution line and determined the basic criteria for developing a device that can detect a live underground line.

흡음재 배치를 통한 닫힌 공간에서의 소음원 방사 파워 제어 (Radiation Power Control by Means of Absorptive Material Arrangement in an Enclosure)

  • 조성호;김양한
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2004년도 춘계학술대회논문집
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    • pp.688-691
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    • 2004
  • We have studied the possibility of global noise reduction by the sound power control through selection of distribution and impedance of absorptive materials. It is necessary to investigate the relation between the global sound energy in the field and the total sound power radiated by sources. In the previous work (1,2), the authors presented a useful design method to change boundary condition that can be useful to reduce noise in acoustically small enclosures. The possibility of total acoustic potential energy reduction by acoustic source power control is examined in an acoustically small cavity. Using acoustic energy balance equation, the relation between global noise control performance and absorptive material's arrangement/impedance is deduced. Numerical simulation is performed to interpret its physical meaning in terms of absorbent's distribution and impedance.

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유연송전시스템에서의 역률 보상을 위한 배전용 정지형 동기조상기의 전류제어 (Predictive Current Control of Distribution Static Condenser (D-STATCON) for Reactive Power Compensation in Flexible AC Transmission System(FACTS))

  • 오관일;문건우;전영수;이기선;추진부
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 1998년도 전력전자학술대회 논문집
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    • pp.447-454
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    • 1998
  • This paper describes a modeling and current control techniques of Distribution static condenser (D-STATCON) for power factor compensation. The current control is based on the predictive and the space vector PWM scheme. The predictive current controlled PWM D-STATCON can maintain its performance with power factor compensation and fixed switching frequency. By using the space vector control low ripple and offset in the current and the voltage as well as fast dynamic responses are achieved with a small DC link capacitance employed.

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