公开(公告)号：US20240339837A1

公开(公告)日：2024-10-10

申请号：US18577626

申请日：2022-07-08

Applicant: Nextracker LLC

Inventor： Francesco BORRELLI ,  Chen LI ,  Yang LIU ,  Alexander AU

IPC: H02J3/32 ,  H02J3/10 ,  H02J3/38

CPC classification number: H02J3/32 ,  H02J3/10 ,  H02J3/381 ,  H02J2300/24

Abstract: An electrical system includes inverters coupled together in parallel and coupled to a common DC bus. The electrical system also includes a common AC bus coupled between outputs of the inverters and an electrical power grid. The electrical system also includes local controllers coupled to the inverters and decentralized controllers coupled to the local controllers. The decentralized controllers measure voltages and currents of the electrical power grid and the inverters and generate decentralized control signals for the local control controllers based on the measured voltages and currents. The electrical system also includes a centralized controller in communication with the local controllers. The centralized controller predicts a DC load and generates centralized control signals for the local controllers to maintain a constant voltage on the common DC bus based on the predicted DC load.