• Title/Summary/Keyword: 최대 전압점 추적

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Comparision and Analyses of Photovoltaic System with Voltage-Based and Current-Based Maximum Power-Point Tracking (전압과 전류에 기초한 최대전력점추적 기술에 대한 비교와 분석에 관한연구)

  • Lee C.S.;Seo Y.S.;Hwang L.H.
    • Proceedings of the KIEE Conference
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    • summer
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    • pp.1501-1503
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    • 2004
  • 설명되는 비교와 분석은 두개의 간단하고 빠르면서 신뢰성 있는 광기전력 시스템에 대한 최대전력점추적 기술의 비교를 나타낸다 : 즉 전압에 기초한 최대전력점추적과 전류에 기초한 최대전력점추적 방법이다. 온라인으로 전압, 전류 측정이 가능하고 전압에 기초한 최대전력점추적과 전류에 기초한 최대전력점추적 알고리즘으로 프로그램된 마이크로프로세서로 제어되는 추적기가 구성된다. 솔라 시스템의 부하로는 양수펌프 또는 저항으로 한다. 새로운 추적기의 모델링과 모의실험을 위해 시뮬링크 툴을 이용한다. 기존의 추적기와 비교되는 새로운 최대전력점추적기의 장점은 효율적이며 싸고 더 신뢰성 있는 태양광 발전 시스템으로서 dummy 셀의 제거이다.

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MPPT Control using Power-Voltage Characteristic of Solar Array for Photovoltaic Applications (Solar Array의 전압-전력 특성을 이용한 MPPT 제어 시스템)

  • Kwon, Doo-Il;Ji, Sang-Keun;Yoo, Cheol-Hee;Han, Sang-Kyoo;Roh, Chung-Wook;Hong, Sung-soo
    • Proceedings of the KIPE Conference
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    • 2008.06a
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    • pp.323-325
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    • 2008
  • Solar Array는 일사량 및 온도에 의해 얻을 수 있는 최대전력이 변화한다. 또한 Solar Array의 전압에 따라 출력 전력이 변화한다. 따라서 태양전지의 동작점을 최대 전력점에서 동작하게 하는 최대 전력점을 추적(MPPT:Maximum Power Point Tracking)하는 제어 시스템이 필요하다. 본 논문에서는 Solar Array의 전압과 전력의 상관관계를 이용하여 최대 전력점을 추종하는 제어 시스템을 제안한다. 이 방식은 빠르게 최대 동작점을 찾을 수 있고 높은 전력 변환 효율을 가지며 다른 방식에 비해 구성이 간단하다. 제안된 제어기법의 타당성을 검증하기 위하여 MPPT시뮬레이션과 실험을 수행하였다.

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A Maximum Power Point Tracking circuit for Thermoelectric Generators using a Boost DC-DC converter (부스트 컨버터를 이용한 열전소자의 최대전력점 추적회로)

  • Park, Jung-Yong;Kim, Shi-Ho
    • Journal of the Institute of Electronics Engineers of Korea SD
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    • v.48 no.10
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    • pp.15-19
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    • 2011
  • We have proposed a maximum power point tracking (MPPT) circuit for thermoelectric generator (TEG) using a Boost converter. The key point of the proposed MPPT circuit is that the duty ratio of the boost converter automatically moves to Maximum Power Point by comparing of consecutive sampling voltage using two comparators. From the simulation results, we showed that the proposed circuit can find the maximum power point within 2 CLK periods and to generate optimal PWM signal within 3 CLK periods. The proposed MPPT circuit was designed by using a CMOS 0.18 um process, and it is now on the fabrication.

A Design of Gate Driver Circuits in DMPPT Control for Photovoltaic System (태양광 분산형 최대전력점 추적 제어를 위한 고전압 게이트 드라이버 설계)

  • Kim, Min-Ki;Lim, Shin-Il
    • Journal of Korea Society of Industrial Information Systems
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    • v.19 no.3
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    • pp.25-30
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    • 2014
  • This paper describes the design of gate driver circuits in distributed maximum power point tracking(DMPPT) controller for photovoltaic system. For the effective DMPPT control in the existence of shadowed modules, high voltage gate driver is applied to drive the DC-DC converter in each module. Some analog blocks such as 12-b ADC, PLL, and gate driver are integrated in the SoC for DMPPT. To reduce the power consumption and to avoid the high voltage damage, a short pulse generator is added in the high side level shifter. The circuit was implemented with BCDMOS 0.35um technology and can support the maximum current of 2A and the maximum voltage of 50V.

Modular Photovoltaic PCS with High-frequency Isolation (고주파 절연 모듈형 Photovoltaic PCS)

  • Kwon, Jung-Min;Kwon, Bong-Hwan
    • 한국신재생에너지학회:학술대회논문집
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    • 2005.06a
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    • pp.132-135
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    • 2005
  • A modular photovoltaic PCS with high-frequency isolation is proposed. The proposed system consists of a SEPIC converter and a full-bridge inverter. Using the power slope versus voltage of the PV array, the MPPT controller is proposed that produces a smooth transition to the maximum power point. The disturbance of the line voltage is detected using a fast sensing technique. Experimental results obtained on a 500W prototype show high performance such as almost unity power factor, $90\%$ power efficiency, $3.6\%$ THD.

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Model for Maximum Power Point Tracking Using Artificial Neural Network and Fuzzy (인공 신경망과 퍼지를 이용한 최대 전력점 추적을 위한 모델)

  • Kim, Tae-Oh;Ha, Eun-Gyu;Kim, Chang-Bok
    • The Journal of Korean Institute of Information Technology
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    • v.17 no.9
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    • pp.19-30
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    • 2019
  • Photovoltaic power generation requires MPPT algorithm to track stable and efficient maximum power output power point according to external changes such as solar radiation and temperature. This study implemented a model that could track MPP more quickly than original MPPT algorithm using artificial neural network. The proposed model finds the current and voltage of MPP using the original MPPT algorithm for various combinations of insolation and temperature for training data of artificial neural networks. The acquired MPP data was learned using the input node as insolation and temperature and the output node as the current and voltage. The Experiment results show tracking time of the original algorithms P&O, InC and Fuzzy were respectively 0.428t, 0.49t and 0.4076t for the 0t~0.3t range, and MPP tracking time of the proposed model was 0.32511t and it is 0.1t faster than the original algorithms.

Maximum Power Point Tracking operation of Thermoelectric Module without Current Sensor (전류센서가 없는 열전모듈의 최대전력점 추적방식)

  • Kim, Tae-Kyung;Park, Dae-Su;Oh, Sung-Chul
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.18 no.9
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    • pp.436-443
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    • 2017
  • Recently, the development of new energy technologies has become a hot topic due to problems,such as global warming. Unlike renewable energy technologies, such as solar energy generation, solar power, and wind power, which are optimized to achieve medium or above output power, the output power of energy harvesting technology is very small and has not received much attention. On the other hand, as the mobile industry has been revitalized recently, the utility of energy harvesting technology has been reevaluated. In addition, the technology of tracking the maximum power point has been actively researched. This paper proposes a new MPPT(Maximum Power Point Tracking) control method for a TEM(thermoelectric module) for load resistance. The V-I curve characteristics and internal resistance of TEM were analyzed and the conventional MPPT control methods were compared. The P&O(Perturbation and Observation) control method is more accurate, but it is less economical than the CV (Constant Voltage)control method because it usestwo sensors to measure the voltage and current source. The CV control method is superior to the P&O control method in economic aspects because it uses only one voltage sensor but the MPP is not matched precisely. In this paper, a method wasdesigned to track the MPP of TEM combining the advantages of the two control method. The proposed MPPT control method wasverified by PSIM simulation and H/W implementation.

A New Solar Energy Conversion System Implemented Using Single Phase Inverter (단상 인버터를 이용한 새로운 태양광 에너지 변환 시스템 구현)

  • Kim, Sil-Keun;Hong, Soon-Ill
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.20 no.7
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    • pp.74-80
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    • 2006
  • This paper describes a solar energy conversion strategy is applied to grid-connected single phase inverter by the maximum power point of conversion strategy. The maximum power point of tracking is controlled output power of PV(photovoltaic)modules, based on generated circuit control MOSFET switch of two boost converter for a connected single phase inverter with four IGBT's switch in full bridge. The generation control circuit allows each photovoltaic module to operate independently at peak capacity, simply by detecting of the output power of PV module. Furthermore, the generation control circuit attenuates low-frequency ripple voltage. which is caused by the full-bridge inverter, across the photovoltaic modules. The effectiveness of the proposed inverter system is confirmed experimentally and by means of simulation.

A study on Photovoltaic System to Considers a Solar Position Tracker for Air Conditioner a Clinic room (병실 냉.난방장치용 태양 위치 추적기를 이용한 태양광 발전시스템에 관한 연구)

  • Hwang, Lark-Hoon;Na, Seung-Kwon
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.8 no.6
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    • pp.1355-1362
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    • 2007
  • In this paper, these setting can be useful in the microprocessor and sensor that designed to improve the efficiency of the photovoltaic system the photovoltaic position tracker device, and compared the normal photovoltaic system of fixed form with the photovoltaic system of solar position tracked form. Moreover, this is compared the catalogue of solar cell module and the simulation through a mathematics modelling with the solar cell's characteristic interpreting and that is composed an power conversion system with boost converter and voltage source inverter. This device can be used to the constant voltage control method for maximum power point tracking in boost converter control. Experiment Results is shown that using a SPWM(Sinusoidal Pulse Width Modulation) control method in inverter control.

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Small Signal Modeling and Control Design of a Single-Phase Grid-Connected Inverter for the Phoovoltaic System (단상 계통 연계 태양광 인버터의 소신호 모델링 및 제어기 설계)

  • Lee, S.J.;Bae, H.S.;Choi, K.S.;Cho, B.H.
    • Proceedings of the KIPE Conference
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    • 2008.06a
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    • pp.604-606
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    • 2008
  • 본 논문에서는 단상 계통 연계 태양광 인버터의 소신호 모델링을 통한 체계적인 제어기 설계 방법을 제안한다. 계통 연계 태양광 인버터의 내부 전류제어기는 계통 전압과 동상이 되도록 계통 주입 전류를 제어하고, 외부 전압제어기의 태양전지 안정화 제어기를 통해 태양전지의 최대전력점 추적제어를 수행한다. 태양전지의 전 동작 영역에서 안정적인 동작 수행과 계통주입 전류 제어를 위한 태양전지 전압 제어기 및 인버터 전류제어기의 안정도 해석 및 설계 방법을 소신호 모델링을 통해 제시한다. 본 연구에 제안된 방법은 200W급 태양전지를 이용한 축소 시스템을 이용하여 검증한다.

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