Towards the establishment of maximum PV generation limits due to power quality constraints

Patsalides, Minas; Stavrou, Andréas; Efthymiou, Venizelos; Georghiou, George E.

doi:10.1016/j.ijepes.2012.03.043

Cited by 52 publications

(27 citation statements)

References 34 publications

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“…Thus, the efficiency and lifespan of solar systems highly depend on the actual radiation field for each specific location. For instance, a high variability in the solar radiation, occurring mainly under broken cloud conditions, increases the fatigue of materials (Patsalides et al 2007;Patsalides et al 2012).…”

Section: Introductionmentioning

confidence: 99%

Pyranometer Thermal Offset: Measurement and Analysis

Sanchez

Serrano

Cancillo

et al. 2015

Journal of Atmospheric and Oceanic Technology

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The reliable estimation of the radiative forcing and trends in radiation requires very accurate measurements of global and diffuse solar irradiance at the earth's surface. To improve measurement accuracy, error sources such as the pyranometer thermal offset should be thoroughly evaluated. This study focuses on the measurement and analysis of this effect in a widely used type of pyranometer. For this aim, a methodology based on capping the pyranometer has been used and different criteria for determining the thermal offset have been applied and compared. The thermal offset of unventilated pyranometers for global and diffuse irradiance has been measured under a wide range of cloud, ambient temperature, wind speed, and radiation conditions. Significant differences in absolute values and variability have been observed between daytime and nighttime, advising against correcting the thermal offset effect based only on nighttime values. Notable differences in the thermal offset between cloudy and cloud-free conditions have been also observed. The main results show that the ambient temperature, the radiation, and its direct/diffuse partitioning are the variables more related to the daytime thermal offset.

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Section: Introductionmentioning

confidence: 99%

Pyranometer Thermal Offset: Measurement and Analysis

Sanchez

Serrano

Cancillo

et al. 2015

Journal of Atmospheric and Oceanic Technology

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“…PV harmonic current emission obviously depends on PV inverter technology and its control strategy. However, the results of harmonic current emission are not completely different for different PV inverters since they all seem to respond to a similar pattern .…”

Section: Harmonics In Pv Output Currentsmentioning

confidence: 92%

“…In addition, this research proposes a method in which the first characterisation (fundamental-frequency PV current) determines the weights of a mixture distribution based on the second characterisation (PV harmonic currents). This method makes it possible to obtain the distribution functions of the PV harmonic currents (absolute magnitude and phase angle) since these currents mainly depend on the PV power output level [5][6][7][8][28][29][30][31][32][33][34]. Furthermore, one of the key points of this harmonic modelling of the PV system models is the fact that it provides the relationship between PV harmonic current emission and background harmonic voltages at a given operating point of the system (e.g.…”

Section: Introductionmentioning

confidence: 99%

Harmonic modelling of PV systems for probabilistic harmonic load flow studies

Ruíz-Rodríguez

Hernández

Jurado

2014

Circuit Theory & Apps

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Summary Probabilistic harmonic load flow (HLF) is currently enjoying renewed popularity. This is not surprising since in the near future, thousands of photovoltaic (PV) systems will be integrated into distribution systems. However, as yet, there is no model capable of explaining PV harmonic current behaviour in probabilistic HLF studies. To fill this gap, the harmonic modelling of PV systems proposed in this paper has three key points. First, it provides an effective model of the relationship between PV harmonic current emission and background harmonic voltages. Second, it statistically characterises PV harmonic currents (relative magnitude and phase angle) at different fundamental‐frequency current output intervals using historical time‐series data. In this statistical characterisation, the first fifth moments of each PV harmonic current are used to accurately approximate the raw probability density function (PDF) by means of the Legendre series. Finally, the third key point of this harmonic modelling is a method capable of determining the distribution functions of PV harmonic currents (absolute magnitude and phase angle), based on the statistical characterisation and a fundamental‐frequency probabilistic PV model. The numerical results obtained confirm the effectiveness of this PV model. Copyright © 2014 John Wiley & Sons, Ltd.

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“…The harmonic impact due to CFLs was studied in [1][2][3]. In [4,5], the effects of residential photovoltaic installations were analyzed. With a high penetration of EV charges, the harmonic distortion is discussed as shown in [6,7].…”

Section: Introductionmentioning

confidence: 99%

Stochastic Residential Harmonic Source Modeling for Grid Impact Studies

Nijhuis

Ćuk

et al. 2017

Energies

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Abstract:With the introduction of more non-linear loads, e.g., compact fluorescent lamps, electric vehicles, photovoltaics, etc., the need to determine the harmonic impact of the residential load is rising, illustrated by the many studies performed on their harmonic impact. Traditionally, these studies are performed for a single new device and single penetration level, neglecting the harmonic interaction between new types of devices, as well as giving little information at which moment in time possible problems may arise. A composite approach to access the impact of harmonic sources on the distribution network is therefore proposed. This method combines a bottom-up stochastic modeling of the residential load with harmonic measurement data and harmonic load-flows all based on a scenario analysis. The method is validated with measurement data and shows a good prediction of the current level of harmonics in a residential neighborhood for the current situation. To demonstrate the applicability of the proposed method, case studies are performed on the IEEE European Low Voltage Test Feeder. These case studies show a marked difference between applying individual device-based models and a composite modeling approach, demonstrating why the proposed approach is an adequate method for the determination of the impact of new devices on the harmonics.

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Towards the establishment of maximum PV generation limits due to power quality constraints

Cited by 52 publications

References 34 publications

Pyranometer Thermal Offset: Measurement and Analysis

Pyranometer Thermal Offset: Measurement and Analysis

Harmonic modelling of PV systems for probabilistic harmonic load flow studies

Stochastic Residential Harmonic Source Modeling for Grid Impact Studies

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