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Comparison of common-mode voltage in three-phase quasi-Z-source inverters using different shoot-through implementation methods

Noroozi, N ; Sharif University of Technology | 2018

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  1. Type of Document: Article
  2. DOI: 10.1109/CPE.2018.8372566
  3. Publisher: Institute of Electrical and Electronics Engineers Inc , 2018
  4. Abstract:
  5. In Z-source family inverters, shoot-through (ST) states are applied as a part of passive state in each switching cycle. The distribution of ST intervals along a switching period affects the system parameters as total harmonic distortion (THD), switching loss and common-mode voltage (CMV). In this paper, ST methods in a three-phase quasi-Z-source inverter (q-ZSI) are compared due to the CMV level. High-frequency harmonics of CMV cause leakage current flow in a transformerless grid-connected photovoltaic (PV) system. Through the comparison of the ST methods, the method with minimum CMV is identified. The experimental results are Prasented for a low voltage q-ZSI prototype. © 2018 IEEE
  6. Keywords:
  7. Leakage current ; Quasi-Z-source inverter ; Leakage currents ; Power electronics ; Common mode voltage ; Grid-connected photovoltaic system ; High-frequency harmonics ; Switching cycles ; Switching period ; Total harmonic distortion (THD) ; Transformerless ; Z-source inverter ; Electric inverters
  8. Source: Proceedings - 2018 IEEE 12th International Conference on Compatibility, Power Electronics and Power Engineering, CPE-POWERENG 2018 ; 4 June , 2018 , Pages 1-6 ; 9781538625088 (ISBN)
  9. URL: https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=8372566