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Recently, after high feed-in tariffs in Italy, retroactive cuts in the energy payments have generated economic concern about several grid-connected photovoltaic (PV) systems with poor performance. In this paper the proposed procedure suggests some rules for determining the sources of losses and thus minimizing poor performance in the energy production. The on-site field inspection, the identifi...

Photovoltaic (PV) modules comprise bypass diodes to limit hotspot formation. However, they suffer from performance reduction in the presence of partial shading. This paper proposes external circuitry control connection type (series/parallel) PV cells through a pair on/off switches resulting three different operation modes. Mode 1 represents typical 36 series-connected cells, while mode 2 two pa...

Accurate and fast fault monitoring system is important for photovoltaic (PV) systems to reduce the damage energy loss associated with faults. This paper presents a detection classification scheme PV systems. The rate of change measured power at array level firstly used detect differentiate between shading short-circuit Then, cross-strings differential currents classify type in case proposed met...

Photovoltaic (PV) modules are prone to short circuits, open cracks, which can bring serious harmful effects. It is difficult establish the corresponding PV fault models diagnose status of strings. The paper proposes a machine learning-based stacking classifier (MLSC) for accurate diagnosis Specifically, operating state modules, parameter sensitivity algorithm used analyze impact characteristic ...

The potential-induced degradation (PID) of photovoltaic (PV) modules is one the most extreme types in PV modules, where PID-affected can result an almost 25% power reduction. Understanding how module defects impact PID key to reducing issue. Therefore, this work investigates anti-PID inverter on throughout three years field operating conditions. We used electroluminescence (EL), ultraviolet flu...

The Centre for Sustainable Energy Systems (CSES) at The Australian National University, with Origin Energy, has developed a novel cell fabrication process for single crystal silicon PV. The Sliver® cell fabrication process produces narrow and long cells. With some modifications to the current fabrication process it is possible to produce Sliver® cells suitable for concentrator systems with low ...

Many grid connected PV installations consist of a single series string of PV modules and a single DCAC inverter. This efficiency of this topology can be enhanced with additional low power, low cost per panel converter modules. Most current flows directly in the series string which ensures high efficiency. However parallel Cúk or buck-boost DC-DC converters connected across each adjacent pair of...

This work proposes a novel fault diagnostic technique for photovoltaic systems based on Artificial Neural Networks (ANN). For a given set of working conditions solar irradiance and photovoltaic (PV) module's temperature a number of attributes such as current, voltage, and number of peaks in the current evoltage (IeV) characteristics of the PV strings are calculated using a simulation model. The...