METHOD FOR TESTING THE STRINGS TO SOLAR MODULES OF A PHOTOVOLTAIC SYSTEM, AND PHOTOVOLTAIC INVERTER FOR CARRYING OUT THE METHOD

摘要

The invention relates to a method for testing the strings (3) of a photovoltaic system, and also to a photovoltaic inverter (1) for carrying out this method. According to the invention, each relay (14), each current-measuring device (15) and the voltage-measuring device (16) are connected to the control device (7) and said control device is designed to control each relay (14), each current-measuring device (15) and the voltage-measuring device (16) in such a way as to automatically ascertain at least individual values of the U/I characteristic curve of each string (3), and said control device is connected to at least one interface (17) for connection to sensors for measuring environmental parameters in the region of the string (3) and is connected to a memory (10) for storing the ascertained values for creating a test report, wherein the control device (7) is further designed to convert the ascertained values optionally to Standard Test Conditions under defined environmental conditions and to compare said ascertained values with values which are stored in the memory (10).