SYSTEM AND METHOD FOR OPERATING POWER CONVERTERS

摘要

An electrical circuit (160) for a power converter includes a first switching device (132) proximate an AC source (104). The circuit also includes a voltage measurement device (154) proximate a DC link (112) and extends between the AC source and the DC link. The circuit further includes a DC voltage source (152) and a first capacitive device (134). The first capacitive device (134) is positioned between the first switching device (132) and the voltage measurement device (154). The circuit further includes a second switching device (132) positioned between the first capacitive device (134) and the voltage measurement device (154). The circuit also includes a controller (120) operatively coupled to the DC voltage source (152), the voltage measurement device (154), and the switching devices (132). The controller (120) is configured to open the second switching device when a measured voltage signal generated by the voltage measurement device (154) is substantially representative of a reference voltage value.