Phuyal, S., Shrestha, S., Sharma, S., & Subedi, R. (2024). An Optimized H5 Hysteresis Current Control with Clamped Diodes in Transformer-less Grid-PV Inverter. arXiv preprint arXiv:2410.04836.
This paper presents a novel HCH5-D2 inverter topology for transformerless grid-connected photovoltaic (PV) systems. The study aims to address the issue of leakage current in transformerless inverters, which can lead to safety concerns and reduced efficiency.
The authors propose a modified H5 topology with two clamping diodes (HCH5-D2) to mitigate leakage current. The paper analyzes the common-mode voltage (CMV) behavior of the proposed topology and compares it to the conventional H4 topology. A simulation model of a 2.2kW grid-connected single-phase HCH5-D2 PV inverter system is developed in MATLAB/Simulink to evaluate its performance.
The simulation results demonstrate that the HCH5-D2 topology effectively maintains a constant CMV, significantly reducing leakage current compared to the conventional H4 topology. The proposed topology also exhibits unipolar differential-mode voltage characteristics, minimizing switching losses.
The HCH5-D2 topology offers a promising solution for transformerless PV inverters, effectively addressing the challenge of leakage current while maintaining high efficiency. The simplicity of the design, utilizing only five switches and hysteresis band current control, further enhances its practicality.
This research contributes to the development of efficient and safe transformerless PV inverters, promoting the wider adoption of renewable energy sources. The proposed HCH5-D2 topology offers a practical solution for mitigating leakage current, a critical concern in grid-connected PV systems.
The study is limited to simulation-based analysis. Future research should focus on experimental validation of the proposed topology under various grid conditions. Further investigation into the dynamic performance and control optimization of the HCH5-D2 inverter is also recommended.
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Önemli Bilgiler Şuradan Elde Edildi
by Sushil Phuya... : arxiv.org 10-08-2024
https://arxiv.org/pdf/2410.04836.pdfDaha Derin Sorular