The invention discloses a high-
voltage suspended type photovoltaic grid-connected
inverter system; after being connected to a confluence device, a plurality of photovoltaic modules are connected to an
inverter, namely a DC / AC unit, to form a plurality of primary units, and then the outputs of the plurality of primary units are directly connected to a
power grid for performing
high voltage transmission after being sequentially connected in series; the quantity of the plurality of photovoltaic modules should meet the requirement of enabling the output
voltage of the
inverter, namely the DC / AC unit to reach 300VAC; when a
power station where the photovoltaic modules are located is far away from a
machine room where the inverter is located, each photovoltaic module is firstly connected to a DC / DC boosting unit to from a primary
small unit; after being connected to the confluence device, the plurality of primary small units are connected to the inverter, namely the DC / AC unit, to form a plurality of secondary small units; the outputs of the plurality of secondary small units are directly connected to the
power grid for performing
high voltage transmission after being sequentially connected in series; according to the high-
voltage suspended type photovoltaic grid-connected inverter
system each DC / AC unit has the function of maximum power tracing, thus being capable of improving power conversion efficiency of the whole
power generation system; each DC /
AC module is adjustable in power grade, and thereby power of the whole inverter can reach 500KW-1MW.