Abstract
The Photovoltaic (PV) central inverter architecture comprises of various PV module configurations. These PV module configurations are vulnerable to shading effects and cause mismatching power losses. To reduce the detrimental effect of shading and mismatching on energy production, Distributed-Maximum Power Point Tracking (D-MPPT) architecture has been proposed. In this architecture, an individual DC-DC converter is integrated to each PV module/sub-module or short-string of PV modules to extract the maximum power. This topology is referred to as Module-Integrated-Converter (MIC). In conventional D-MPPT architecture, the output terminals of the MICs are connected in series or parallel configurations only. The conventional configurations of MICs are having certain limitations. To overcome these limitations, this research paper proposes the Total-Cross-Tied (T-C-T) configuration of MICs with three-level direct duty ratio control Perturb & Observe (P&O) MPPT algorithm. The performance of the proposed configuration is compared with the conventional configurations under various partial shading conditions (PSCs) by considering the variations in the output power and power loss of the system.
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