METHOD AND DEVICE FOR PROTECTING SEVERAL STRINGS OF A PHOTOVOLTAIC GENERATOR FROM REVERSE 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.

主权项

1. A method for reverse current protection of a number of strings of a photovoltaic generator being connected to a common DC link in parallel in small groups respectively via a corresponding DC/DC converter, comprising:
detecting a current flowing via each of the DC/DC converters; and inhibiting a reverse current flowing through one of the DC/DC converters by a control of the DC/DC converter in response to the detection.