Single-Phase Transformerless Photovoltaic Inverter With Suppressing Resonance in Improved H6

Akpınar E., Balıkcı A., Durbaba E., Turan Azizoğlu B.

IEEE TRANSACTIONS ON POWER ELECTRONICS, cilt.34, sa.9, ss.8304-8316, 2019 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 34 Sayı: 9
  • Basım Tarihi: 2019
  • Doi Numarası: 10.1109/tpel.2018.2886054
  • Dergi Adı: IEEE TRANSACTIONS ON POWER ELECTRONICS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.8304-8316
  • Anahtar Kelimeler: Common-mode voltage, leakage current, photovoltaic (PV) system, transformerless inverter, unipolar sinusoidal pulsewidth modulation (SPWM), LEAKAGE CURRENT, CONVERTERS, TOPOLOGIES, REDUCTION
  • Dokuz Eylül Üniversitesi Adresli: Evet

Özet

In low-power applications of photovoltaic (PV) systems, the transformerless grid-connected inverters have been preferred to increase the efficiency and reduce the cost, size, and power losses when they are compared to the ones with the transformer. A transformerless single-phase inverter topology with a single dc-link capacitor for the grid-connected PV systems is proposed in this paper. The proposed inverter has been simulated by using a cooperation process of the MATLAB and SPICE package programs and it has been implemented for experimental verification. The proposed inverter reduces the high-frequency common-mode leakage current caused by parasitic capacitances of PV panels, whereas it is controlled with the unipolar sinusoidal pulsewidth modulation. Also, the results show that the common-mode voltage remains constant. The efficiency of the proposed inverter has been compared to that of the most common topologies having the dc-link decoupling during the zero voltage states. This paper is accompanied by a video file demonstrating the power loss distribution in the inverter.