Photovoltaic inverter input electric quantity calculation method

The invention discloses a photovoltaic inverter input electric quantity calculation method. The method comprises the following steps that S1, subordination relationships sequentially included betweena photovoltaic power station, a photovoltaic inverter small chamber, photovoltaic inverters, combiner boxes, combiner box branch circuits and a photovoltaic assembly are acquired; S2, the active powerof each combiner box branch circuit is acquired; S3, according to the active power of the combiner box branch circuits of the same combiner box, the active power of each combiner box is calculated; S4, according to the active power of the combiner boxes connected to the same photovoltaic inverter, the active power of each inverter is calculated; S5, the input electric quantity of each inverter iscalculated according to the active power of each inverter. According to the method, logic calculation is carried out on collected real-time running data of each branch circuit of the photovoltaic combiner boxes, the input acti