A Bidirectional Grid-Tied ZVS Three-Phase Converter Based on DPWM and Digital Control

Yi-Hung Liao (), Faa-Jeng Lin, Ying Zhou, Wei-Rong Lai and Xuan-Sheng Huang
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Yi-Hung Liao: Department of Electrical Engineering, National Central University, Taoyuan City 320317, Taiwan
Faa-Jeng Lin: Department of Electrical Engineering, National Central University, Taoyuan City 320317, Taiwan
Ying Zhou: Department of Electrical Engineering, National Central University, Taoyuan City 320317, Taiwan
Wei-Rong Lai: Department of Electrical Engineering, National Central University, Taoyuan City 320317, Taiwan
Xuan-Sheng Huang: Department of Electrical Engineering, National Central University, Taoyuan City 320317, Taiwan

Energies, 2023, vol. 16, issue 18, 1-26

Abstract: In this paper, a bidirectional grid-tied ZVS three-phase converter is proposed. The circuit operation principle in both the rectifier and inverter modes was analyzed. The proposed topology could achieve zero-voltage switching in the six main switches and the auxiliary switch both in the rectifier mode and inverter mode. In addition, the reverse recovery current of body diodes in the main switches was also suppressed. Furthermore, in order to realize the ZVS control scheme under the grid-tied bidirectional power flow condition and reduce the number of switchings, a modified carrier-based discontinuous PWM was proposed to fit the bidirectional switching sequence. Finally, a 3 kW prototype was constructed. Some simulation and experimental results are presented to verify the validity of the proposed circuit topology and PWM control scheme.

Keywords: zero-voltage switching (ZVS); discontinuous pulse-width modulation (DPWM); bidirectional power flow; reverse recovery current; grid tied (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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