Module-to-Panel Modular Differential Power Processing Converter With Isolated DC Bus for Photovoltaic Systems Under Partial Shading

Uno, Masatoshi; Suzuki, Takumi; Fujii, Yukio

doi:10.1109/jestie.2022.3206166

Cited by 5 publications

(1 citation statement)

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“…Based on these DPP architectures, a TCT-SC system has been proposed and implemented for arbitrary array sizes, and the conversion efficiency was found to be 97% [16]. Similarly, a module-to-panel modular converter has been proposed in which the PV system contains an isolated DC bus and the experimental validation showed that the system had a 5.6% higher annual energy yield during partial shading [17]. Additionally, another switched capacitor-based DPP for a large PV power plant was proposed, and the field testing showed an average energy yield of 10-20% in the system during partial shading [18].…”

Section: Introductionmentioning

confidence: 99%

Reliability Enhancement of Photovoltaic Systems under Partial Shading through a Two-Step Module Placement Approach

Aljafari

Satpathy

Madeti³

et al. 2022

Energies

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Partial shading has a negative impact on photovoltaic systems by forcing the connected modules to generate lower power, creating severe unexpected power losses. To resolve this issue, numerous solutions have been proposed, among which configuration modification has recently attracted a greater audience. The preliminary approach to module reconfiguration was based on the alteration of electrical connections through switches, which introduces lag due to the large number of switches and sensors, complex algorithms, and impractical application. Hence, static techniques are considered to be a cost-effective, low-complexity and easy-to-adopt solution for efficiently reducing the losses due to shading. Hence, this paper proposes a two-step module replacement approach that is validated under multiple partial shading conditions, and the performance is compared with various conventional and hybrid configurations and a static electrical reconfiguration technique using mathematical analysis, comparative parameters and power curves analysis. The validation was performed using the MATLAB platform for two system sizes—6 × 6 and 18 × 3—proving its applicability for arbitrary system sizes. On the basis of the depth investigation, an average power increase of 17.49%, 14.47%, and 14.12% for the two-step approach compared to the conventional, hybrid and electrical reconfiguration was observed in the partial shading cases considered.

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Section: Introductionmentioning

confidence: 99%