Performance Of Grid-connected PV System Research Articles

Control of Grid-Tied Inverter During Unbalanced Transient Fault

With increasing use of renewable and clean form of energy, PV systems have become popular due to its versatility and easy implementation. The overall performance of grid-connected PV systems is directly influenced by the performance of grid-tied inverter. Hence, control of grid-tied PV inverter has become a temptation. This project explores the development of grid-connected PV system and optimization of control strategies for grid-tied inverter to ensure its seamless operation and grid stability during transient faults. The transient faults occurring at the inverter side disrupts the normal operation of inverter and even lead to shut down of inverter during faults.Therefore, a control strategy is suggested and developed to control the overvoltage of DC-link capacitor and deliberately functioning and output of grid-tied inverter is improved. This is simply possible by introducing ELC so that the inverter needs not be shut down.

Experimental outdoor performance evaluation of photovoltaic plant in a Sahara environment (Algerian desert)

This paper present the experimental study of the pilot photovoltaic plant installed in the desert environment in the region of Ghardaia (32.26N°, 03.46E°) per season and per sky condition (sunny, partly cloudy and cloudy) based on the measurements quantities (meteorological and electrical data) which are obtained from the PV grid-connected system site. The main goal of this study is to investigate the impact of season and sky conditions on the performance of grid-connected PV system. This study was carried out in applied research unit for renewable energies (URAER). The assessed factors of the PV installation include energy output, reference yield YR, array yield YA, final yield YF, array losses LC, system losses LS and performance ratio PR. The experimental results are presented and discussed well in sunny and cloudy. The results show that the highest PR was in winter due to the low average ambient temperature and irradiation; the maximum values of reference yield, array yield, and final yield were in summer day due to high level of daily solar irradiation. In addition, the performance of the grid-connected PV system does not completely depend on solar radiation, but depends on other environmental effects such as ambient temperature but less than the solar radiation.

Visualization of Operational Performance of Grid-Connected PV Systems in Selected European Countries

This paper presents the results of the analyses of operational performance of small-sized residential PV systems, connected to the grid, in the Netherlands and some other European countries over three consecutive years. Web scraping techniques were employed to collect detailed yield data at high time resolution (5–15 min) from a large number (31,844) of systems with 741 MWp of total capacity, delivering data continuously for at least one year. Annual system yield data was compared from small and medium-sized installations. Cartography and spatial analysis techniques in a geographic information system (GIS) were used to visualize yield and performance ratio, which greatly facilitates the assessment of performance for geographically scattered systems. Variations in yield and performance ratios over the years were observed with higher values in 2015 due to higher irradiation values. The potential of specific yield and performance maps lies in the updating of monitoring databases, quality control of data, and availability of irradiation data. The automatic generation of performance maps could be a trend in future mapping.

Harmonic Performance of Grid-Connected PV System under Various Penetration Levels

This paper studies the harmonic performance of grid-connected PV system under various penetration levels. The system under study was modelled in MATLAB/Simulink environment. Current and voltage distortions were studied in terms of the percentage of Total Harmonic Distortion (THD) under different PV penetration scenarios. The results showed that the Grid-Connected PV generates a different level of harmonics distortion depending on the PV penetration level that was injected to the grid.

Operational performance of grid‐connected PV systems on buildings in Germany

AbstractThis paper presents operational performance results of grid‐connected PV systems in Germany, as collected and elaborated for the Photovoltaic Power Systems Programme (PVPS) of the International Energy Agency (IEA). Performance ratios obtained from 235 PV installations in Germany and from 133 PV plants in other countries are compared and discussed. For Germany, a significant rise in PV system performance and reliability was observed for new PV installations due to higher component efficiencies (e.g., inverter) and increased availabilities.There is a lack of long‐term experience in performance and reliability of PV systems, owing to the absence of monitoring programmes. As an outcome of IEA PVPS collaborative work, Task 2 provides reliable and worldwide monitoring performance data and results (www.task2.org). Technical and operational data is available for system planning and comparison, for teaching and training purposes as well as for future developments of financing schemes (e.g., feed‐in‐tariffs) in order to stimulate the PV market. Copyright © 2004 John Wiley & Sons, Ltd.