Photovoltaic arrays, in part having switches for short-circuiting of modules

摘要

A photovoltaic generator is provided that has at least one string of multiple series-connected photovoltaic modules, each of which has a plurality of series-connected photovoltaic cells. One quarter to one half of all photovoltaic modules of the at least one string can be short-circuited by means of a switch. Activation of the switch takes place when a predefined voltage value across the string is exceeded. The shorting switch is only present in some of the arrays making up the photovoltaic generator, which reduces cabling costs. Because of the parallel connection of the arrays, the voltage of the arrays without shorting switches is drawn down to a lower voltage that is safe for the inverter.

主权项

1. A photovoltaic generator, comprising:
a plurality of parallel-connected arrays, each array including multiple parallel-connected strings of series-connected photovoltaic modules; at least one shorting switch electrically coupled to only a portion of the photovoltaic modules of a string, the portion being at least two of the photovoltaic modules of the string, the at least one shorting switch configured to short-circuit the portion of the photovoltaic modules of the string based on a predefined voltage value across the string being exceeded, wherein only some of the arrays include a shorting switch, and wherein the arrays that include the shorting switch are located adjacent to an inverter.