公开(公告)号：US20210351591A1

公开(公告)日：2021-11-11

申请号：US17266832

申请日：2019-07-24

Applicant: LS ELECTRIC CO., LTD.

Inventor： Ju Ho LIM

IPC: H02J3/38 ,  H02S50/00 ,  H02S40/38 ,  H02J7/35

Abstract: A photovoltaic system and a control method therefor are disclosed. A photovoltaic system according to an embodiment of the present disclosure comprises: a solar cell array for converting solar energy into electric power; a power management device for monitoring the power generation amount of the solar cell array and the reverse power from an external power grid; an energy storage device charged by receiving the electric power produced by the solar cell array or the power of the external power grid; and a power control device for supplying, to the energy storage device, the electric power generated by the solar cell array or the power of the external power grid in response to a valid power command, wherein the power management device generates the valid power command which has different values according to whether the reverse power is generated by the external power grid.