The type of reactive power compensation device of PV power station is in general divided into SVG+FC or total SVG. As for the large PV power station in the north part of China and in accordance with distribution curve of radiation intensity at the stationsite

such two type of reactive power compensation device as SVG+FC and whole SVG are compared by the comparison in both economic and technical aspects of the whole life period.It is known by the comparison and analysis that for the 100 MW PV power station model established in the north region

the choice of SVG+FC is preferable for the reactive power compensation due to large percentage rate of by no radiation intensity at night

in which the choice of FC capacity is the fixed capacity of reactive compensation of the whole PV power station. From point view of the technology

since the fault rate of SVG is a bit higher

the choice of SVG+FC is more reliable for the PV power station.The study result can be sued as reference for the related industry and research institute rated to the design to the PV powerstation.