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Low-leakage Current HERIC Transformerless Single-phase Photovoltaic Grid-connected Inverter
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Caixue CHEN1, Zongyuan LIU1, Lucheng ZHANG2
Journal of Power Supply | 2025, 23(5) : 61 - 68
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Journal of Power Supply | 2025, 23(5): 61-68
• DC-AC Inverters •
Low-leakage Current HERIC Transformerless Single-phase Photovoltaic Grid-connected Inverter
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Caixue CHEN1, Zongyuan LIU1, Lucheng ZHANG2
Affiliations
  • 1.School of Automation and Electronic Information, Xiangtan University, Xiangtan 411100, China
  • 2.School of Electrical Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China
Published: 2025-09-30 doi: 10.13234/j.issn.2095-2805.2025.5.61
Outline
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To solve the problem of large leakage current in a photovoltaic (PV) grid-connected inverter, a low-leakage current HERIC transformerless single-phase PV grid-connected inverter topology is proposed. This inverter topology only needs eight power switching tubes, four of which constitute four quasi-bidirectional voltage switching units. The four quasi-bidirectional voltage switching units are divided into two groups, and they alternate conduction with grid frequency to realize continuous current, thus reducing the loss of switching tubes and effectively suppressing the common-mode leakage current. Finally, the proposed topology was verified by simulation and experimental results.

Inverter  /  photovoltaic (PV) cell  /  common-mode voltage  /  leakage current  /  HERIC
陈才学, 刘宗元, 张路成. 一种低漏电流HERIC非隔离单相光伏并网逆变器. 电源学报, 2025 , 23 (5) : 61 -68 . DOI: 10.13234/j.issn.2095-2805.2025.5.61
Caixue CHEN, Zongyuan LIU, Lucheng ZHANG. Low-leakage Current HERIC Transformerless Single-phase Photovoltaic Grid-connected Inverter[J]. Journal of Power Supply, 2025 , 23 (5) : 61 -68 . DOI: 10.13234/j.issn.2095-2805.2025.5.61
Appendix
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Year 2025 volume 23 Issue 5
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Article Info
doi: 10.13234/j.issn.2095-2805.2025.5.61
  • Receive Date：2022-09-25
  • Online Date：2026-10-26
  • Published：2025-09-30
Article Data
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History
  • Received：2022-09-25
  • Revised：2022-11-24
  • Accepted：2022-12-28
Affiliations
    1.School of Automation and Electronic Information, Xiangtan University, Xiangtan 411100, China
    2.School of Electrical Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China
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