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  • Küçük Resim
    Öğe
    Design and operation of a multifunction photovoltaic power system with shunt active filtering using a single-stage three-phase multilevel inverter
    (Tubitak Scientific & Technical Research Council Turkey, 2017) Sezen, Serkan; Aktaş, Ahmet; Uçar, Mehmet; Özdemir, Engin
    In this paper, the control of a multifunction grid-connected photovoltaic (PV) system with a three-phase three level (3L) neutral point clamped (NPC) inverter is proposed, which can perform shunt active filtering. Normally, the shunt active filtering is achieved by detecting the harmonic and reactive currents of the nonlinear load and then injecting the compensating current into the grid. Therefore, the proposed system can inject PV power to a grid with power factor correction and current harmonic filtering features simultaneously. In addition, a single-stage compact and efficient transformerless power conversion topology is used in this paper for the grid-connected solar PV system with maximum power point tracking capability. In order to control the multilevel inverter-based combined system, a synchronous reference frame control technique and hysteresis current control pulse width modulation method have been applied. The system configuration and control strategy are verified and validated by simulations based on MATLAB/Simulink and implemented in real-time using the dSPACE DS1103 controller board. The simulation with experimental results indicates that the injected currents are sinusoidal and current total harmonic distortion is about 3.9%, lower than the IEEE 519 harmonic limit.
  • Küçük Resim
    Öğe
    Design and operation of a multifunction photovoltaic power system with shunt active ltering using a single-stage three-phase multilevel inverter
    (2017) Sezen, Serkan; Aktaş, Ahmet; Uçar, Mehmet; Özdemir, Engin
    In this paper, the control of a multifunction grid-connected photovoltaic (PV) system with a three-phase three- level (3L) neutral point clamped (NPC) inverter is proposed, which can perform shunt active ltering. Normally, the shunt active ltering is achieved by detecting the harmonic and reactive currents of the nonlinear load and then injecting the compensating current into the grid. Therefore, the proposed system can inject PV power to a grid with power factor correction and current harmonic ltering features simultaneously. In addition, a single-stage compact and efficient transformerless power conversion topology is used in this paper for the grid-connected solar PV system with maximum power point tracking capability. In order to control the multilevel inverter-based combined system, a synchronous reference frame control technique and hysteresis current control pulse width modulation method have been applied. The system con guration and control strategy are veri ed and validated by simulations based on MATLAB/Simulink and implemented in real-time using the dSPACE DS1103 controller board. The simulation with experimental results indicates that the injected currents are sinusoidal and current total harmonic distortion is about 3.9%, lower than the IEEE 519 harmonic limit.
  • Küçük Resim
    Öğe
    A Three-Phase Three-Level NPC Inverter Based Grid-Connected Photovoltaic System With Active Power Filtering
    (Ieee, 2014) Sezen, Serkan; Aktaş, Ahmet; Uçar, Mehmet; Özdemir, Engin
    This paper presents a three-phase three-level neutral point clamped (NPC) inverter based single-stage grid-connected photovoltaic (PV) system with shunt active power filter (APF) functionality. The proposed system can perform both the maximum real power injection with the perturb and observe (P&O) maximum power point tracking (MPPT) algorithm from the PV panels into the grid and active power filtering to compensate the load current harmonics. Thus, the PV system operates more efficiently compared to the conventional PV systems and can be useful for power system applications. Control of the proposed system is based on synchronous reference frame control algorithm and hysteresis band current control technique. The effectiveness of the proposed system is demonstrated with Matlab/Simulink simulations and validated through dSPACE DS1103 real-time control platform based laboratory experimental results.