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A novel modulation method for reducing common mode voltage in three-phase inverters

Noroozi, N ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1109/EEEIC.2017.7977818
  3. Abstract:
  4. Leakage current is originated from common-mode voltage (CMV) time variations in a grid-connected photovoltaic (PV) system and results in several deficiencies. In this paper, a new method is proposed for CMV reduction in a three-phase voltage source inverter (VSI) system. The proposed method is based on space vector modulation and it utilizes only odd and zero vectors. By using the proposed method, the number of fluctuations of the CMV waveform per switching cycle is reduced; therefore, the amount of high-frequency harmonics of CMV is decreased. In addition, because of applying both active and zero vectors by the proposed method, the total harmonic distortion becomes less than most of other reduced CMV (RCM) methods. The integrity of the method is confirmed by simulation of a 3.5kw three-phase system. © 2017 IEEE
  5. Keywords:
  6. Leakage current ; Photovoltaic system ; Space vector modulatio ; Leakage currents ; Modulation ; Photovoltaic cells ; Vector spaces ; Vectors ; Common mode voltage ; Grid-connected photovoltaic system ; High-frequency harmonics ; Photovoltaic systems ; Space vector ; Three-phase inverter ; Three-phase voltage source inverters ; Total harmonic distortion (THD) ; Electric inverters
  7. Source: Conference Proceedings - 2017 17th IEEE International Conference on Environment and Electrical Engineering and 2017 1st IEEE Industrial and Commercial Power Systems Europe, EEEIC / I and CPS Europe 2017, 6 June 2017 through 9 June 2017 ; 2017 ; 9781538639160 (ISBN)
  8. URL: https://ieeexplore.ieee.org/document/7977818