English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

In this paper, a photovoltaic (PV) reconfigurable grid-tied inverter (RGTI)scheme is proposed. Unlike a conventional GTI that ceases operation during apower outage, the RGTI is designed to act as a regular GTI in the on-grid modebut it is reconfigured to function as a DC-DC charge-controller that continuesoperation during a grid outage. During this period, the RGTI is tied to thebattery-bank of an external UPS based backup power system to augment it withsolar power. Such an operation in off-grid mode without employing communicationwith the UPS is challenging, as the control of RGTI must not conflict with thebattery management system of the UPS. The hardware and control design aspectsof this requirement are discussed in this paper. A battery emulation controlscheme is proposed for the RGTI that facilitates seamless functioning of theRGTI in parallel with the physical UPS battery to reduce its discharge current.A system-level control scheme for overall operation and power management ispresented to handle the dynamic variations in solar irradiation and UPS loadsduring the day, such that the battery discharge burden is minimized. The designand operation of the proposed RGTI system are independent of the external UPSand can be integrated with an UPS supplied by any manufacturer. Experimentalresults on a 4~kVA hardware setup validate the proposed RGTI concept, itsoperation and control.

A Reconfigurable Solar Photovoltaic Grid-Tied Inverter Architecture for Enhanced Energy Access in Backup Power Applications