Advanced Single-Phase Non-Isolated Microinverter with Time-Sharing Maximum Power Point Tracking Control Strategy

Anees Alhasi, Patrick Chi-Kwong Luk (), Khalifa Aliyu Ibrahim and Zhenhua Luo
Additional contact information
Anees Alhasi: Faculty of Engineering and Applied Sciences, Cranfield University, Bedford MK43 0AL, UK
Patrick Chi-Kwong Luk: Faculty of Engineering and Applied Sciences, Cranfield University, Bedford MK43 0AL, UK
Khalifa Aliyu Ibrahim: Faculty of Engineering and Applied Sciences, Cranfield University, Bedford MK43 0AL, UK
Zhenhua Luo: Faculty of Engineering and Applied Sciences, Cranfield University, Bedford MK43 0AL, UK

Energies, 2025, vol. 18, issue 18, 1-22

Abstract: Partial shading poses a significant challenge to photovoltaic (PV) systems by degrading power output and overall efficiency, especially under non-uniform irradiance conditions. This paper proposes an advanced time-sharing maximum power point tracking (MPPT) control strategy implemented through a non-isolated single-phase multi-input microinverter architecture. The system enables individual power regulation for multiple PV modules while preserving their voltage–current (V–I) characteristics and eliminating the need for additional active switches. Building on the concept of distributed MPPT (DMPPT), a flexible full power processing (FPP) framework is introduced, wherein a single MPPT controller sequentially optimizes each module’s output. By leveraging the slow-varying nature of PV characteristics, the proposed algorithm updates control parameters every half-cycle of the AC output, significantly enhancing controller utilization and reducing system complexity and cost. The control strategy is validated through detailed simulations and experimental testing under dynamic partial shading scenarios. Results confirm that the proposed system maximizes power extraction, maintains voltage stability, and offers improved thermal performance, particularly through the integration of GaN power devices. Overall, the method presents a robust, cost-effective, and scalable solution for next-generation PV systems operating in variable environmental conditions.

Keywords: microinverter; efficiency; distributed maximum power tracking (DMPPT); mismatched photovoltaic (PV); full power processing (FPP); time-sharing MPPT control strategy (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
References: Add references at CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1996-1073/18/18/4925/pdf (application/pdf)
https://www.mdpi.com/1996-1073/18/18/4925/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:18:y:2025:i:18:p:4925-:d:1750743

Access Statistics for this article

Energies is currently edited by Ms. Cassie Shen

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().