Inverters for grid connection of photovoltaic systems and power quality: Case studies

Spertino, Filippo; Leo, Paolo Di; Corona, Fabio; Papandrea, Fabio

doi:10.1109/pedg.2012.6254058

Cited by 18 publications

(5 citation statements)

References 5 publications

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“…The main results demonstrate that, in the presence of high PV power injection, the voltage variations also in short term (on second/minute scales) are well limited within the +/−10% of the RMS values in LV grids, while the occurrence of frequency variations is not realistic [33]. On the other hand, considering the grid impedance negligible in the majority of the applications, the voltage waveform is poorly affected by harmonic distortion [34]. Also in presence of non-negligible harmonic distortion of the waveforms of current injected into the grid (>5% of the rated current) and unbalance (some percent of the positive sequence component), in a three-phase system, the consequent harmonic distortion (2-3% of the rated value) and unbalance of the grid voltage (<1% of the positive-sequence component) is within the limits of the European Standards of power quality [35].…”

Section: Simulation Of Grid-connected Pv Systemmentioning

confidence: 91%

Energetic-Environmental-Economic Feasibility and Impact Assessment of Grid-Connected Photovoltaic System in Wastewater Treatment Plant: Case Study

Andrei

Badea²,

Andrei

et al. 2020

Energies

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Wastewater treatment plants and power generation constitute inseparable parts of present society. So the growth of wastewater treatment plants is accompanied by an increase in the energy consumption, and a sustainable development implies the use of renewable energy sources on a large scale in the power generation. A case study of the synergy between wastewater treatment plants and photovoltaic systems, aiming to improve the energetic, environmental and economic impacts, is presented. Based on data acquisition, the energy consumption analysis of wastewater treatment plant reveals that the highest demand is during April, and the lowest is during November. The placement of photovoltaic modules is designed to maximize the use of free space on the technological area of wastewater treatment plant in order to obtain a power output as high as possible. The peak consumption of wastewater treatment plant occurs in April, however the peak production of the photovoltaic is in July, so electrochemical batteries can partly compensate for this mismatch. The impact of the photovoltaic system connectivity on power grid is assessed by means of the matching-index method and the storage battery significantly improves this parameter. Carbon credit and energy payback time are used to assess the environmental impact. The results prove that the photovoltaic system mitigates 12,118 tons of carbon and, respectively, the embedded energy is compensated by production in 8 ½ years. The economic impact of the photovoltaic system is analyzed by the levelized cost of energy, and the results show that the price of energy from the photovoltaic source is below the current market price of energy.

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Section: Simulation Of Grid-connected Pv Systemmentioning

confidence: 91%

Energetic-Environmental-Economic Feasibility and Impact Assessment of Grid-Connected Photovoltaic System in Wastewater Treatment Plant: Case Study

Andrei

Badea²,

Andrei

et al. 2020

Energies

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“…This first analysis does not highlight the partial shading phenomenon, which affects only some of the PV arrays. The roof of the building is the typical triangular-shape shed and presents tie-beams which strengthen the top structure but create a periodic shading over some PV arrays in the early morning and in the afternoon [26]. The shade evolution causes a diagonal partial shading over the modules, like a series of moving rod-shaped shades (see Fig.…”

Section: Real Photovoltaic System and Standard Power Quality Indicatorsmentioning

confidence: 99%

Experimental Indicators of Current Unbalance in Building-Integrated Photovoltaic Systems

Chicco

Corona

Porumb

et al. 2014

IEEE J. Photovoltaics

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Unbalance of the three-phase currents in photovoltaic (PV) systems may depend on structural aspects of the installation, the effect of partial shading, or both. In this paper, a number of unbalance indicators are calculated starting from data that are measured during experimental analyses on a real building-integrated PV system that represents different types of unbalance. Detailed information is obtained from indices that identify the balance and unbalance components that are also in the presence of waveform distortion. These indices extend the current definitions of unbalance given in the power quality standards. The results show that the unbalance cannot be considered negligible, even with no singlephase inverters and is more significant if nonlinear loads add a contribution to both harmonic distortion and unbalance seen from the distribution transformer.

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“…To prevent this problem a bypass diode is connected across a certain number of cells. The use of bypass diodes mitigates the problem of hot spots, but it complicates the electrical characteristics of the array, as experimentally proved in [3]. Due to the action of these diodes multiple peaks appear in the P-V characteristics of the array under PSC.…”

Section: Introductionmentioning

confidence: 99%

A method for obtaining the I-V curve of photovoltaic arrays from module voltages and its applications for MPP tracking

et al. 2016

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Inverters for grid connection of photovoltaic systems and power quality: Case studies

Cited by 18 publications

References 5 publications

Energetic-Environmental-Economic Feasibility and Impact Assessment of Grid-Connected Photovoltaic System in Wastewater Treatment Plant: Case Study

Energetic-Environmental-Economic Feasibility and Impact Assessment of Grid-Connected Photovoltaic System in Wastewater Treatment Plant: Case Study

Experimental Indicators of Current Unbalance in Building-Integrated Photovoltaic Systems

A method for obtaining the I-V curve of photovoltaic arrays from module voltages and its applications for MPP tracking

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