METHOD FOR DISCONNECTING A PHOTOVOLTAIC ASSEMBLY AND PHOTOVOLTAIC ASSEMBLY

摘要

A method for disconnecting a photovoltaic assembly, wherein the photovoltaic assembly includes the following: a string having a plurality of photovoltaic modules having a plurality of solar cells, an electrical line, which connects the individual photovoltaic modules to one another to form the string and serve the purpose of conducting the current produced by the individual solar cells in the photovoltaic modules to a common inverter. The photovoltaic assembly is disconnected by a disconnection signal in a hazard situation. Furthermore, in order to ensure increased safety in an emergency situation, provision is made for the disconnection signal to be conducted via the electrical line to the individual photovoltaic modules in the string, for the disconnection signal to be detected at the respective photovoltaic module and for the respective photovoltaic module to be disconnected via a switching device arranged at the respective photovoltaic module.

主权项

1. A method for disconnecting a photovoltaic assembly, wherein the photovoltaic assembly comprises the following:
a string consisting of several photovoltaic modules comprising a plurality of solar cells, electrical line means which connect the individual photovoltaic modules to one another to form the string and which serve the purpose of conducting the current produced by the individual solar cells in the photovoltaic modules to a common inverter, wherein disconnection of the photovoltaic assembly is performed in a hazardous situation by means of a disconnection signal, as a result of which interruption of the electrical line means takes place at the respective photovoltaic module, the disconnection signal is conducted via the electrical line means to the individual photovoltaic modules in the string, the disconnection signal is detected at the respective photovoltaic module, the respective photovoltaic module is disconnected via a switching device arranged at the respective photovoltaic module, determination of at least one status parameter of the respective photovoltaic module is implemented by a test circuit associated with the respective photovoltaic module, and the disconnection signal can be detected as a further signal which can be sensed by the test circuit, wherein a modulated voltage or current signal is fed into the electrical line means in order to trigger the disconnection operation, and a central evaluation unit is provided which receives the information relating to the status of the photovoltaic modules via the electrical line means.