A Modified Multi-Winding DC–DC Flyback Converter for Photovoltaic Applications
Source abstract
Abstract
DC–DC power converters have generated much interest, as they can be used in a wide range of applications. In micro-inverter applications, flyback topologies are a relevant research topic due to their efficiency and simplicity. On the other hand, solar photovoltaic (PV) systems are one of the fastest growing and most promising renewable energy sources in the world. A power electronic converter (either DC/DC or DC/AC) is needed to interface the PV array with the load/grid. In this paper, a modified interleaved-type step-up DC–DC flyback converter is presented for a PV application. The topology is based on a multi-winding flyback converter with N parallel connected inputs and a single output. Each input is supplied by an independent PV module, and a maximum power point tracking algorithm is implemented in each module to maximize solar energy harvesting. A single flyback transformer is used, and it manages only 1/N of the converter rated power, reducing the size of the magnetic core compared to other similar topologies. The design of the magnetic core is also presented in this work. Moreover, the proposed converter includes active snubber networks to increase the efficiency, consisting of a capacitor connected in series with a power switch, to protect the main switches from damaging dv/dt when returning part of the commutation energy back to the source. In this work, the operating principle of the topology is fully described on a mathematical basis, and an efficiency analysis is also included. The converter is simulated and experimentally validated with a 1 kW prototype considering three PV panels. The experimental results are in agreement with the simulations, verifying the feasibility of the proposal.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Photovoltaic System Optimization Techniques · Advanced DC-DC Converters · Multilevel Inverters and Converters
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Electrical Engineering, Universidad de La Frontera, Temuco 4780000, Chile
Department of Electrical Engineering, Pontificia Universidad Católica de Chile, Santiago 8331150, Chile
Department of Electronic and Electrical Engineering, University of Sheffield, Sheffield S10 2TN, UK
Department of Electrical Engineering, Universidad de Concepción, Concepción 4030000, Chile
Department of Electrical Engineering, University of Nottingham, Nottingham NG7 2QL, UK
Department of Electrical Engineering, Universidad de Magallanes, Punta Arenas 6210427, Chile
Funding
Agencia Nacional de Investigación y Desarrollo
References (31)
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