| CHEN Yenan,XU Dehong.Principle of Soft-switching Single-phase Grid-connected PV Inverter and Grid-connected Test[J].JOURNAL OF POWER SUPPLY,2018,16(5):31-37 |
| Principle of Soft-switching Single-phase Grid-connected PV Inverter and Grid-connected Test |
| Received:July 18, 2017 Revised:April 11, 2018 |
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| DOI：10.13234/j.issn.2095-2805.2018.5.31 |
| Keywords:photovoltaic soft switching inverter |
| Fund Project:The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan) |
| Author | Institution | Email |
| CHEN Yenan |
College of Electrical Engineering, Zhejiang University, Hangzhou , China |
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| XU Dehong |
College of Electrical Engineering, Zhejiang University, Hangzhou , China |
xdh@zju.edu.cn |
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| Abstract: |
| To optimize the efficiency and improve the power density, a soft-switching single-phase grid-connected photovoltaic(PV) inverter based on MOSFET and its zero-voltage switching sinusoidal pulse width modulation(ZVS SPWM) method were proposed. The operation principle of the soft-switching single-phase grid-connected converter was introduced. Using the zero-voltage modulation method, the auxiliary resonant circuit was controlled, thus realizing the zero-voltage switching of MOSFET and the suppression of reverse recovery of its body-diode. The switching frequency of the inverter was 100 kHz, thus the grid-connected filter inductance was reduced. A 30 kW grid-connected PV generation system was built, and a PV generation test was conducted on ten 3 kW soft-switching single-phase grid-connected PV inverters, which verified the theoretical analysis and the reliability of the generation system. |
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