Power management system and method for string solar inverter

Abstract

A system includes a maximum power point (MPP) tracker coupled between a first solar panel string and a DC voltage bus, wherein the MPP tracker includes a first DC / DC converter and is configured to perform a maximum power point tracking (MPPT) control scheme on the first DC / DC converter, a power reservoir coupled between a second solar panel string and the DC voltage bus, wherein the power reservoir includes a second DC / DC converter, and an inverter coupled between the DC voltage bus and a power grid, wherein the inverter is configured to operate in multiple modes including a grid-forming (GFM) mode and a grid-following (GFL) mode, and wherein in the GFM mode, the second DC / DC converter is configured to regulate a voltage on the DC voltage bus.

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