Novel LCL filter for non-isolated photovoltaic inverters with CM current trapping capability for weak grids
| Author | Khan, A. |
| Author | Khan, Ahmad |
| Author | Iqbal, Atif |
| Author | Shadmand, Mohammad B. |
| Available date | 2019-09-09T07:50:58Z |
| Publication Date | 2018-12-26 |
| Publication Name | Proceedings: IECON 2018 - 44th Annual Conference of the IEEE Industrial Electronics Society |
| Identifier | http://dx.doi.org/10.1109/IECON.2018.8591076 |
| ISBN | 9781509066841 |
| Abstract | © 2018 IEEE. In this work, a novel LCL filter topology for non-isolated Photovoltaic (PV) applications is developed. This topology has the ability to trap the High-Frequency (HF) Common Mode (CM) current inside the PV inverter. Consequently, suppressing the ground leakage current. Furthermore, the proposed solution is immune to ground leakage current resonance issues (i.e. effective for applications where the utility grid is characterized as a weak grid). Moreover, the theoretical analyses were validated on a 10 kW grid-connected PV system. The results demonstrated that at resonance conditions, the proposed system reduced the leakage current root-mean-square (RMS) value from 1 A to 25 mA. Thus, satisfying the VDE standard's leakage current limit. |
| Sponsor | This publication was made possible by NPRP grant # [X-033-2-007] from the Qatar National Research Fund (a member of Qatar Foundation). The statements made herein are solely the responsibility of the authors. |
| Language | en |
| Publisher | IEEE |
| Subject | Grid-Connected Ground leakage current LCL filter Non-isolated Photovoltaic (PV) Transformer-less |
| Type | Conference |
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Electrical Engineering [2813 items ]