Quasi-autonomous photovoltaic application in North regions
2017
Snegirjovs, A., Institute of Physical Energetics, Riga (Latvia) | Shipkovs, P., Institute of Physical Energetics, Riga (Latvia) | Kashkarova, G., Institute of Physical Energetics, Riga (Latvia) | Lebedeva, K., Institute of Physical Energetics, Riga (Latvia)
Quasi-autonomous photovoltaic (PV) technology is a PV based solar energy use system for electricity production with electricity accumulators and connection to the grid. This type of PV technology has a wider application range due to benefits of combination fr om autonomous and grid connected systems. Part of PV generated electricity is accumulated till it is the consumption demand. The peak demand and demand in non- sunny seasons are covered from the grid. Reduced electricity re-load from the grid has economical advantages, as well as it is beneficial to energetics in overall. Surplus it secures from the grid electrical interruption effects. Electrical accumulator use significantly increases the costs of the PV based system. As well not all of accumulators are suitable for lot of full charge/discharge times. Moreover, they are limited lifelong. In most of cases, accumulator often replacement is inexpedient from ecological and maintenance points of view Therefore, calculation of appropriate electricity accumulators for long time use is very necessary. This paper provides review of the most widespread quasi-autonomous technologies, analysis of electricity accumulator long-life in solar energy applications. As well, the paper describes appropriate use of quasi-autonomous PV application in agriculture field.
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