Solar-battery integrated DC system

Patent · Tue Feb 27 04:00:00 EST 2024

OSTI ID:2541869

Atcitty, Stanley; De Angelis, Valerio; Ranade, Satishkumar J.; Augustine, Sijo; Pragallapati, Nataraj; Lavrova, Olga

A DC bus is connected to a PV array, a battery or both, to power a grid connected inverter load on the bus. A system and method is described for controlling current flow on a DC bus regardless of the type of inverter. A converter receives a DC battery voltage. A switching module controls current flow through the converter. A current generator generates a reference current in response to a reference voltage. A comparator connected at the output of the current generator compares the reference current with a battery current and outputs a signal to a controller. The controller generates a reference value. A PWM generator modulates the switch module to control current flow and energy flow between the DC bus and the battery. The current from the DC bus to the inverter is controlled to allow proper grid-connected operation regardless of inverter type.

• Research Organization: Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States); Arrowhead Center, Inc., Las Cruces, NM (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA); National Science Foundation (NSF)
• DOE Contract Number: NA0003525
• Assignee: National Technology & Engineering Solutions of Sandia, LLC (Albuquerque, NM); Arrowhead Center, Inc. (Las Cruces, NM); De Angelis, Valerio (Santa Barbara, CA)
• Patent Number(s): 11,916,511
• Application Number: 17/500,632
• OSTI ID: 2541869
• Country of Publication: United States
• Language: English