公开(公告)号：US20240152169A1

公开(公告)日：2024-05-09

申请号：US18409086

申请日：2024-01-10

申请人： Nextracker LLC

发明人： Yang LIU ,  Alexander W. AU ,  Fei GU

IPC分类号： G05F1/67 ,  H02J3/38 ,  H02J7/35

CPC分类号： G05F1/67 ,  H02J3/381 ,  H02J7/35 ,  H02J2207/20 ,  H02J2300/26

摘要： Solar power systems and methods utilize DC power transmission and centralized power inversion. The solar power systems include a photovoltaic (PV) bus system and a fixed bus system. The PV system utilizes a control mode handoff control method, which includes determining that a local maximum power point tracking (MPPT) control is enabled; in response to determining that the local MPPT control is enabled, starting an MPPT mode timer; performing local MPPT; determining that the MPPT mode timer is greater than a predetermined period; and, in response to determining that the MPPT mode timer is greater than a predetermined period, handing off MPPT control to the next MPPT controller. The distributed MPPT control method may include sequential MPPT control, adaptive ΔV MPPT control, and/or power limiting control. The fixed bus system includes PV string-level MPPT controllers and a fixed DC input central inverter or multiple fixed DC modular inverters.