• 제목/요약/키워드: Self-power generation

검색결과 194건 처리시간 0.038초

자기회귀 웨이블릿 신경망을 이용한 풍력 발전 시스템의 적응 속도 제어기 설계 (Design of Adaptive Velocity Controller for Wind Turbines Using Self Recurrent Wavelet Neural Network)

  • 송승관;최윤호;박진배
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2008년도 제39회 하계학술대회
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    • pp.1691-1692
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    • 2008
  • In this paper, the adaptive neural network technique is proposed to control the speed of wind power generation system. For maximizing generated power effectively, adaptive neural algorithm based on SRWMM(Self Recurrent Wavelet Neural Network) is derived to on-line adjust the excitation winding voltage of the generator. Through computer simulations, it is shown that the proposed method can achieve smooth and asymptotic rotor speed tracking.

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On the Use of a Dimmer for a Robust Frequency Control of a Self-Excited Three-Phase Induction Wind Generator

  • Touti, Ezzeddine;Pusca, Remus;Manata, Jean-Paul;Brudny, Jean Francois;Chaari, Abdelkader
    • Journal of Power Electronics
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    • 제14권3호
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    • pp.580-591
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    • 2014
  • This paper concerns a three-phase self-excited induction generator used for autonomous power generation. It presents a robust control strategy which makes it possible to maintain the frequency quasi constant during the voltage regulation without any control loop on this variable. This strategy, which also prevents the machine disengagement, uses as power converter a simple dimmer. The obtained theoretical and/or numerical results are validated on a laboratory test bench that allows the analysis of this control law effectiveness.

Neural Network Self-Organizing Maps Model for Partitioning PV Solar Power

  • Munshi, Amr
    • International Journal of Computer Science & Network Security
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    • 제22권5호
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    • pp.1-4
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    • 2022
  • The growth in global population and industrialization has led to an increasing demand for electricity. Accordingly, the electricity providers need to increase the electricity generation. Due to the economical and environmental concerns associated with the generation of electricity from fossil fuels. Alternative power recourses that can potentially mitigate the economical and environmental are of interest. Renewable energy resources are promising recourses that can participate in producing power. Among renewable power resources, solar energy is an abundant resource and is currently a field of research interest. Photovoltaic solar power is a promising renewable energy resource. The power output of PV systems is mainly affected by the solar irradiation and ambient temperature. this paper investigates the utilization of machine learning unsupervised neural network techniques that potentially improves the reliability of PV solar power systems during integration into the electrical grid.

IEC 61850 SCL기반 변전소 자동화 시스템의 구성방법 (Substation Automation System Design Process Based on IEC 61850 SCL)

  • 장대붕;임성정;이승재
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2006년도 제37회 하계학술대회 논문집 A
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    • pp.62-64
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    • 2006
  • With the advent of the international standard IEC 61850 for communication networks and systems in substations, utilities are beginning to implement substation automation systems (SAS) that can give support to interoperability, interchangeability and self-description features. This paper describes with the SAS design accordance with this new standard. After a brief introduction of IEC 61850 SCL, this paper addresses some issues related to the specification of an IEC 61850 based SAS, and describes the Substation Configuration Language (SCL) based on Extensible Markup Language (XML). The SAS design process is explored with examples including the Intelligent Electronic Device (IED) selection, Logical Nodes (LN) allocation and the related services and the SAS communication architecture.

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Dependence of Self-heating Effect on Width/Length Dimension in p-type Polycrystalline Silicon Thin Film Transistors

  • Lee, Seok-Woo;Kim, Young-Joo;Park, Soo-Jeong;Kang, Ho-Chul;Kim, Chang-Yeon;Kim, Chang-Dong;Chung, In-Jae
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2006년도 6th International Meeting on Information Display
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    • pp.505-508
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    • 2006
  • Self-heating induced device degradation and its width/length (W/L) dimension dependence were studied in p-type polycrystalline silicon (poly-Si) thin film transistors (TFTs). Negative channel conductance was observed under high power region of output curve, which was mainly caused by hole trapping into gate oxide and also by trap state generation by self-heating effect. Self-heating effect became aggravated as W/L ratio was increased, which was understood by the differences in heat dissipation capability. By reducing applied power density normalized to TFT area, self-heating induced degradation could be reduced.

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대기압 플라즈마 발생시 인가전압의 상승시간에 따른 영향 (Effect of Rise Time of a Pulse Bias Voltage on Atmospheric Plasma Generation)

  • 김재혁;진상일;김영민
    • 전기학회논문지
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    • 제57권7호
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    • pp.1218-1222
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    • 2008
  • We investigate the effect of rise time of a pulse bias voltage on atmospheric plasma generation. With the faster rise time of the pulse bias, the glow discharge appears to be more uniformly generated along the electrodes. I-V measurement confirms that higher loading power can be obtained using the faster rise time. A new understanding for atmospheric plasma generation at a micro-gap electrode is suggested.

마이크로그리드 운영에 따른 전력자립 향상을 위한 에너지저장장치의 적정보조금 산정 (Calculation of Appropriate Subsidies for Energy Storage System to Improve Power Self-sufficiency Consider Microgrid Operation)

  • 최연주;김성열
    • 전기학회논문지
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    • 제66권3호
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    • pp.486-492
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    • 2017
  • In recent years, renewable energy sources have been mentioned as solution to environmental regulation and energy supply-demand. Energy storage systems are needed to mitigate the intermittent output characteristics of renewable energy sources and to operate micro grid efficiently using renewable energy generation systems. However, despite the necessity of energy storage system, this cannot secure the economical efficiency of the energy storage system by high initial cost. In this paper, a micro grid is constructed to supply electric power to industrial customers by using solar power generation system and energy storage system among renewable energy generation power sources and operated to improve energy independence. In the case study, we use photovoltaic system which is representative renewable energy generation system. Unlike conventional photovoltaic system, this system uses floating photovoltaic system with the advantage of having high output and no land area limitations. It is operated for the purpose of improving energy independence in the micro grid. In order to secure economical efficiency, the energy storage system operates a micro grid with a minimum capacity. Finally, this paper calculates the appropriate subsidy for the energy storage capacity.

에너지 자립형 스마트 홈 시스템 개발 (Development of Self-Consumption Smart Home System)

  • 이상학
    • 한국위성정보통신학회논문지
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    • 제11권2호
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    • pp.42-47
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    • 2016
  • 최근 태양광, 에너지 저장 시스템 등의 발전으로 인해 가정에서 에너지 관리 시스템을 구축하고 에너지 생산을 스스로 하고자 하는 에너지 자립형 스마트 홈 시스템에 대한 연구가 활발해 지고 있다. 특히, 일본의 경우 후쿠시마 원전 사태 이후 전력망의 불안정성으로 인해 태양광을 통해 발전하고 이를 전력 에너지 저장 시스템에 저장하고 사용하는 가정용 시스템이 상용화되었다. 북미나 유럽에서도 태양광과 에너지 저장 시스템을 결합하여 신재생에너지 보급사업을 통해 보조금을 지급하면서 설치 가정을 확대하고 있다. 본 논문에서는 댁내 홈 네트워크를 통해 태양광과 에너지 저장 시스템을 연결하고 실시간 요금제에 기반을 둔 에너지 자립형 스마트 홈 시스템 개발에 대해 기술한다. 사용자의 개입을 최소화하면서 자동화된 운전으로 전력망으로부터의 에너지 사용을 최적화하여 에너지 자립형 홈을 구현하였다.

폴리카본산계 혼화제를 이용한 고유동 콘크리트 배합에 관한 연구 (Study on Mix Proportion of Self-Compacting Concrete Utilizing Polycarboxylic Acid based Admixture)

  • 노재명;권기주;나환선;정원섭;오병철
    • 한국콘크리트학회:학술대회논문집
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    • 한국콘크리트학회 2004년도 춘계 학술발표회 제16권1호
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    • pp.212-215
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    • 2004
  • While member sections of concrete structures of nuclear power plant are big, water-cement ratio is small. Consequently, the huge amount of heat generation and high viscosity could be occurred. These might reduce constructibility of nuclear power plant. In order to obtain improved concrete mix proportion on nuclear power plant structures, the properties of normal concrete is compared with self-compacting concrete. In addition, various mixes of self-compacting concrete utilizing polycarboxylic acid based admixture is mutually compared and estimated.

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Static VAR Compensator-based Feedback Control Implementation for Self-Excited Induction Generator Terminal Voltage Regulation Driven by Variable-Speed Prime Mover

  • Ahmed, Tarek;Nishida, Katsumi;Nakaoka, Mutsuo
    • Journal of Power Electronics
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    • 제4권2호
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    • pp.65-76
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    • 2004
  • In this paper, the steady-state analysis of the three-phase self-excited induction generator (SEIG) driven by a variable-speed prime mover (VSPM) such as a wind turbine is presented. The steady-state torque-speed characteristics of the VSPM are considered with the three-phase SEIG equivalent circuit for evaluating the operating performances due to the inductive load variations. Furthermore, a PI closed-loop feedback voltage regulation scheme based on the static VAR compensator (SVC) for the three-phase SEIG driven by the VSPM is designed and considered for the wind power generation conditioner. The simulation and experimental results prove the practical effectiveness of the additional SVC with the PI controller-based feedback loop in terms of fast response and high performances.