Method and apparatus for enhancing arc fault signal for detection in photovoltaic system

摘要

A photovoltaic (PV) system includes a string of at least one PV module, and an arc fault detector (AFD) electrically coupled to the string. The AFD is configured to detect a non-DC electrical current that occurs within the string, and cause electrical contacts within the PV system to open as a result of the detected non-DC electrical current. The system includes a capacitor electrically coupled to the string and to the AFD such that the non-DC electrical current passes through the AFD and the capacitor.

主权项

1. A photovoltaic (PV) system comprising:
a string of at least one PV module; an arc fault detector (AFD) electrically coupled to the string, the AFD configured to:
detect a non-DC electrical current that occurs within the string; andcause electrical contacts within the PV system to open as a result of the detected non-DC electrical current; and a capacitor electrically coupled to the string and to the AFD such that the non-DC electrical current passes through the AFD and the capacitor; a first DC/DC converter coupled to a first string of the string of at least one PV module; and a first coupling transformer coupled to the first DC/DC converter, wherein the capacitor is a first capacitor positioned within one of a primary and a secondary winding of the first coupling transformer.