METHOD AND DEVICE FOR PROTECTING SEVERAL STRINGS OF A PHOTOVOLTAIC GENERATOR FROM RETURN CURRENTS

摘要

In order to protect reverse currents, several strings of a photovoltaic generator, which are connected in small groups respectively via a DC/DC-converter, parallel to a common DC voltage intermediate circuit, the current which flows over each of the DC/DC-converter is detected and if a reverse current is detected flowing through one of the DC/DC converters, the converter is stopped by controlling the DC/DC-converter.