Dear Saida,
there is no reactive power in DC systems, or power factor is 1. Reactive power arises in AC systems and/or in AC/DC systems i.e inverters, cycloconverters, rectifiers. A simple PV receives solar power and converts it to DC electric power. If later this DC power from the PV is used and be converted to AC is another story
Salam
How can you calculate reactive power of dc supply?
Or what do u mean?
Regards
Dear Saida,
there is no reactive power in DC systems, or power factor is 1. Reactive power arises in AC systems and/or in AC/DC systems i.e inverters, cycloconverters, rectifiers. A simple PV receives solar power and converts it to DC electric power. If later this DC power from the PV is used and be converted to AC is another story
Dear Paraskevopoulos has already said that "there is no reactive power in DC systems, If later this DC power from the PV is used and be converted to AC is another story".
In addition, if DC power has a reactive power, of course it will not calculate due to very small value. Reactive power occurs in PV Power Plants, because converts to AC in there.
Dear Saida
You can look at these following publication:
http://www.powerworld.com/files/S01SystemModeling.pdf
best regards
FC
Hi Saida
The reactive power is a characteristic of the inverter rather than the PV itself. If the inverter has spare current capacity (ie it's not already at its rated output) when supplying active power to the grid, then it can use reactive power to contribute to controlling the voltage. Whether it does so or not depends on the local grid connection rules, and these vary for different countries. Have a look at this http://www.energynautics.com/downloads/publikationen/Paper_Energynautics_Connecting_PV_Systems.pdf for an example.
Andrew
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