Patent ID: 9300225
Filing Date: 2016-03-29
CPC Classification: H02M,Y02E

Claim Text:
1. A solar photovoltaic power conversion system converting a DC input voltage into an AC output voltage, the solar photovoltaic power conversion system comprising: an input capacitor bank having a first capacitor and a second capacitor, and the first capacitor and the second capacitor connected to a neutral point and configured to receive the DC input voltage; a first switching circuit connected in parallel to the input capacitor bank, and the first switching circuit having a first bridge arm and a second bridge arm connected in parallel to the first bridge arm; a second switching circuit connected in parallel to the input capacitor bank, and the second switching circuit having a third bridge arm and a fourth bridge arm connected in parallel to the third bridge arm; a first filtering circuit connected to the first switching circuit, and an output side of the first filtering circuit connected to the neutral point; a second filtering circuit connected to the second switching circuit, and an output side of the second filtering circuit connected to the neutral point; and a control circuit configured to produce a plurality of control signals to control the first switching circuit and the second switching circuit, respectively, to reduce leakage current of the DC input voltage caused by parasitic capacitance voltage.