公开(公告)号：US20210273602A1

公开(公告)日：2021-09-02

申请号：US16805798

申请日：2020-03-01

Applicant: NEXTracker Inc.

Inventor： Fei Gu ,  Yang Liu ,  Venkata Rahul Abbaraju ,  Eric Martinez

IPC: H02S20/32 ,  G05D3/10

Abstract: Split-cell and multi-panel photovoltaic backtracking control systems and methods allow for increased total power generation during low sun elevation conditions by shading a percentage of panel modules, thereby allowing for a lower angle of incidence on unshaded modules. The control systems and methods involve determining a sun elevation angle, a traditional backtracking angle, a split-cell or multi-panel backtracking angle, a single-cell or single-panel relative light transmission (RLT) based on the single-cell or single-panel backtracking angle, and a split-cell or multi-panel RLT based on the split-cell or multi-panel backtracking angle. If twice the single-cell or single-panel RLT is greater than the split-cell or multi-panel RLT, the split-cell or multi-panel backtracking angle is used; otherwise, the single-cell or single-panel backtracking angle is used. The control systems and methods may further involve determining a diffuse fraction index (DFI) and, if the DFI is greater than a DFI limit, using a DFI tracking angle.

公开(公告)号：US20220038049A1

公开(公告)日：2022-02-03

申请号：US17389192

申请日：2021-07-29

Applicant: NEXTracker Inc.

Inventor： Alexander W. AU ,  Venkata Rahul Abbaraju ,  Yang Liu ,  Wesley Chu

IPC: H02S40/32 ,  H02J3/38 ,  H02J7/34 ,  H02J15/00

Abstract: A distributed direct current power system including an inverter to invert DC to alternating current (AC), a plurality of photovoltaic (PV) strings, and a plurality of maximum power point tracking (MPPT) converters coupled between the plurality of photovoltaic (PV) strings, respectively, and the central inverter, the plurality of MPPT converters configured to maximize solar power production by the plurality of PV strings and minimize mismatch between the plurality of PV strings. The system also including a plurality of batteries, a plurality of DC-DC battery converters (DCBC) coupled to the plurality of batteries and configured to manage charge and discharge of the plurality of batteries, enable interconnection of the plurality of PV strings and the plurality of batteries, and supply a constant medium DC voltage to the central inverter, and a hydrogen generation system in electrical communication with the inverter, the photovoltaic strings, or the batteries.

公开(公告)号：US20210359149A1

公开(公告)日：2021-11-18

申请号：US17252702

申请日：2019-07-01

Applicant: NEXTRACKER INC.

Inventor： Greg Beardsworth ,  Venkata Rahul Abbaraju ,  Daniel Shugar

IPC: H01L31/068 ,  H02S20/32 ,  H02S40/22

Abstract: A solar tracker including solar modules which include, a frame and a plurality of bifacial solar cells supported by the frame. The solar modules also including a gap formed between two or more of the solar cells, the gap being formed proximate a centerline of the solar modules and configured to a allow passage of light from a first side of the solar modules to a second side of a solar modules, where the light passing through the gap is reflected back onto the plurality of bifacial solar cells and converted to electrical energy.