A grid-connected PV system is made up of an array of panels, mounted on metallic support or integrated into a building.
Components of a grid-connected PV system:
Electrical components: PV modules, power conditioning units, cables, combiner box, connectors.
Civil and mechanical components: module mounting structure, mounting foundation
Power monitoring components: SCADA, Weather station
Criteria for choosing grid-connected panels:
Closely power-matched modules
Good quality connections
Cooled anti-return diodes with a junction-box designed to dissipate their heat
The voltage, current, and power ratings, of the module and the inverter, are the three criteria that ensure proper matching of the system in performance and safety.
The first step of the design process is the preliminary study, which involves the following:
Study of the location - geographical setting
Analysis of the climatic condition
Selection of the system
Selection of the PV technology
The actual design involves the following:
Selection of components
PV array-inverter matching
Cable loss calculation,
Performance analysis of the system includes analysis of energy production, performance ratio and system losses.
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