• Title/Summary/Keyword: Photovoltaic Power System

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Analysis and Design of Utility Interactive Photovoltaic System with Source Side VAR Compensation (전원측 무효전력 보상기능을 갖는 계통연계형 태양광 발전 시스템의 해석 및 설계)

  • 이상용;고재석;한찬영;이정락;최규하;목형수
    • Proceedings of the KIPE Conference
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    • 1999.07a
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    • pp.591-594
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    • 1999
  • The application field of photovoltaic system has been increased widely. In the application of photovoltaic system, the utility interactive photovoltaic system(UIPVS) has benefits of not only the home energy saving in domestic system but also reduction of peak power which threaten the capacity of power plant equipment when the maximum power consumption is occurred in daytime. This paper represents the effect of the nonlinear AC load which connected to the UIPVS with parallel connection and introduces the active power filtering(APF) techniques to the UIPVS for the reactive power compensation. The enhancement of source side power quality using APF algorithm is verified using simulation.

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Design and Characteristics Analysis of a 3 kW Grid-connected Photovoltaic Power Generation System (3 kW 계통연계형 태양광 발전시스템의 설계 및 실증운전특성 분석)

  • Hwang, I.H.;Jeong, S.J.;Ahn, K.S.;Lim, H.C.
    • Solar Energy
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    • v.18 no.1
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    • pp.19-25
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    • 1998
  • This paper describes a design method and characteristics analysis of the 3 kW grid-connected photovoltaic power generation system to establish the basic application technology of photovoltaic systems. The design specification of a 3 kW photovoltaic power generation system including a DC/AC inverter is suggested to investigate the system performance for grid connection. The results of the demonstration test from February to October show that the system with utilization rate up to 17% has reliable operation characteristics and is useful for peak-shaving of utility power.

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A Power Quality Analysis of a Photovoltaic System (태양광 발전설비 전력품질 분석)

  • Jung, Jong-Wook;Kim, Sun-Gu;Choi, Myeong-Il
    • The Transactions of the Korean Institute of Electrical Engineers P
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    • v.58 no.4
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    • pp.579-584
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    • 2009
  • This paper describes a power quality analysis of a photovoltaic generating systems. Prior to the power measurement, domestic and foreign codes related to the photovoltaic generating systems were briefly summarized. After constructing about 5 kW photovoltaic systems, input/output voltages and currents were measured to compare and analyze the power quality by the module type. Based on the measured values, a couple of factors such as active power, power factor, total harmonic distortion(THD) was calculated and analyzed.

Monitoring and Control System for Efficient Operating and Management of Photovoltaic Power Generation System (태양광발전시스템의 효율적 운용과 관리를 위한 모니터링 및 제어 시스템)

  • Bin, Jae-Gu;Kang, Feel-Soon;Kim, Cheul-U
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.11 no.3
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    • pp.532-539
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    • 2007
  • Photovoltaic power generation system is one of new renewable energy sources. Such distributed power generation system has important issues for the system management ad operating after its installation. To solve the problem, remote monitoring and control systems can be employed. In this paper, LabVBEW based monitoring and control system is proposed for efficient management and operation of the photovoltaic power generation system. Interface method between monitoring part and DSP controller is given in detail. The proposed system is verified through experiments using a grid-connected photovoltaic power generation system.

A Novel MPPT Control of IPMSM Drive for Solar Vehicle (Solar Vehicle을 위한 IPMSM 드라이브의 새로운 MPPT 제어)

  • Jang, Mi-Geum;Choi, Jung-Sik;Chung, Dong-Hwa
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.25 no.9
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    • pp.14-25
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    • 2011
  • The solar vehicle is in the spotlight in the eco-friendly aspect of photovoltaic system using unlimited solar energy. The solar vehicle uses energy of photovoltaic and battery. The solar vehicle uses stored energy in battery when photovoltaic power is lower than consumption power by solar vehicle and if photovoltaic power is higher than consumption power by solar vehicle then photovoltaic power is stored to battery. To improve use efficiency of photovoltaic, the researches about MPPT method to operate maximum power point and interior permanent magnet synchronous motor(IPMSM)drive system using photovoltaic is necessary. This paper proposes MPPT control algorithm for solar vehicle using new fuzzy control(NFC). In this paper, to reduce switching loss, the DC-DC converter is omitted. The NFC controller can be use instead of PO. The NFC controller is performed MPPT control using solar cell voltage and q -axis current of IPMSM. The output of NFC is command q -axis current of IPMSM and this current is operated IPMSM. The response characteristics of algorithm proposed in this paper is compared response characteristics of conventional PO method by PSIM program and validity of this paper prove using this result.

New Soft-Switching Current Source Inverter for a Photovoltaic Power System

  • Han, Byung-Moon;Kim, Hee-Jung;Baek, Seung-Taek
    • KIEE International Transaction on Electrical Machinery and Energy Conversion Systems
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    • v.3B no.1
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    • pp.37-43
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    • 2003
  • This paper proposes a soft-switching current source inverter for a photovoltaic power system. The proposed inverter has an H-type switched-capacitor module composed of two semiconductor switches, two diodes, and an LC resonant circuit. The operation of the proposed system was analyzed by a theoretical approach with equivalent circuits and was verified by computer simulations with SPICE and experimental implementation with a hardware prototype. The proposed system could be effectively applied for the power converter of photovoltaic power system interconnected with the AC power system.

A Study on the Optimal PV-module Design for Efficiency Improvement of Photovoltaic System (태양광발전시스템의 효율 향상을 위한 태양전지 모듈의 최적 설계에 관한 연구)

  • Kim, Min;Lee, Gi-Je;Lee, Jin-Seop
    • Proceedings of the KIEE Conference
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    • 2001.10a
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    • pp.328-330
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    • 2001
  • The construct of photovoltaic module array, main power source of photovoltaic system, is very important to the efficiency improvement of whole photovoltaic system. Photovoltaic modules are usually connected in series or parallel to meet power capacity required. Since output characteristics of a photovoltaic module are greatly fluctuated on the variation of insolation, temperature and its type, the maximum open circuit voltage and output operating voltage of photovoltaic module array must exist in the admissible input voltage range of inverter system under any operating conditions. In this paper, we present the selection and array method of photovoltaic modules through simulation for the coupling loss reduction between photovoltaic modules and a inverter.

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A control method and test results of utility interactive photovoltaic power generation systems (계통연계 태양광발전시스템의 제어기법 및 연계운전특성)

  • 안교상;임희천;황인호;주형준
    • Proceedings of the KIPE Conference
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    • 1999.07a
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    • pp.549-553
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    • 1999
  • This paper describes a design method of grid-connected photovoltaic power generation systems with three phase inverter. A 3-phase 50kW photovoltaic power generation system including a DC/AC inverter is designed and made in order to investigate the system performance for grid connection. Also the control scheme of a three phase current-controlled PWM inverter is presented by using d-q transformation. The experimental waveforms show that the proposed system has stable behavior with an unit power factor in utility-interactive operation.

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A Variable Step Size Incremental Conductance MPPT of a Photovoltaic System Using DC-DC Converter with Direct Control Scheme

  • Cho, Jae-Hoon;Hong, Won-Pyo
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.27 no.9
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    • pp.74-82
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    • 2013
  • This paper presents a novel maximum power point tracking for a photovoltaic power (PV) system with a direct control plan. Maximum power point tracking (MPPT) must usually be integrated with photovoltaic (PV) power systems so that the photovoltaic arrays are able to deliver maximum available power. The maximum available power is tracked using specialized algorithms such as Perturb and Observe (P&O) and incremental Conductance (indCond) methods. The proposed method has the direct control of the MPPT algorithm to change the duty cycle of a dc-dc converter. The main difference of the proposed system to existing MPPT systems includes elimination of the proportional-integral control loop and investigation of the effect of simplifying the control circuit. The proposed method thus has not only faster dynamic performance but also high tracking accuracy. Without a conventional controller, this method can control the dc-dc converter. A simulation model and the direct control of MPPT algorithm for the PV power system are developed by Matlab/Simulink, SimPowerSystems and Matlab/Stateflow.

Output Power Characteristics According to Temperature for Photovoltaic Systems (태양광 발전시스템의 온도에 따른 출력전력 특성)

  • Park, Chul-Woong;Choi, Yong-Sung;Lee, Kyung-Sup
    • Proceedings of the KIEE Conference
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    • 2009.04a
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    • pp.186-188
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    • 2009
  • In this thesis, output voltage, current and power of solar module were classified by irradiation and module temperature from data of overall operating characteristics collected for one year in order to manage efficient photovoltaic generation system and deliver maximum power. In addition, from these data, correlations between irradiation, module temperature of photovoltaic cell and amount of power given by photovoltaic cell was quantitatively examined to deduce optimization of the design and construction of photovoltaic generation system. The results of this thesis can be summarized as follows. As output power characteristics according to a temperature range of 10$\sim$50[], output power was increased with an increase in temperature. Since output power increases with temperature increase, the result corresponds well to the related equation on temperature and output power.

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