Abstract
Partial shading conditions of photovoltaic (PV) modules often occurs in urban areas leading to losses in electricity power generation of the PV power plant. The purpose of this study is to present how the PV power plant with high value of inverter power sizing factor (Kinv) can achieve high performance and power production under partial shading conditions with high shading losses. In this paper the results of long-term monitoring, performance analysis and experimental results are presented, while the results are compared to the estimated values calculated using PVsyst software. The study focused on the PV power plant at the Faculty of Technical Sciences (FTS) in Novi Sad, Republic of Serbia, for the period between the years 2012 and 2019. It has been shown that the values of PV power plant performance parameters are better than expected (very high), and resemble the power plants operating without shading. The high value of the inverter power sizing factor may lead to occasional saturation of the inverter when certain conditions are met, but most of the times it allows the inverter to operate at a more optimal power level. PV module soiling and power degradation is within the limits mentioned in the literature. The increase in Kinv in the partial shading conditions favorably affects the performance, does not degrade the efficiency of the inverter at saturation, reduces the effect of soiling and aging of PV modules, leading to higher power production.
Highlights
The beginning of 21st century is characterized by a significant increase in the amount of energy generated from renewable energy sources
Following is the analysis of the eight-year measurement results for the PV power plant with the power of 8 kW that was officially commissioned on 25th of October 2011
The PT100 sensor is used for the air and PV module temperature measurement ranging between −20 ◦ C and +110 ◦ C, with the resolution of 0.1 ◦ C and the accuracy of ±0.5%
Summary
The beginning of 21st century is characterized by a significant increase in the amount of energy generated from renewable energy sources. Further increase in the generation from these types of energy is imperative for achieving the sustainable development goals (SDGs) formulated by the United. The most important achievement offered by the SDG 7 should be the reduction of harmful gasses emission and the development of sustainable industry [1]. SDG 7 in developing countries are hybrid renewable energy microgrids [2]. The most important renewable energy sources are hydro, wind and solar energy. Developed countries have the highest installed capacities of renewable energy sources (RES), followed by several developing countries. The most important countries where the RES energy utilization is crucial are Iceland, Sweden, USA, China and
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