Photovoltaic installation

摘要

A photovoltaic installation includes a photovoltaic generator, electrical connector lines, an enabling signal source, and an arc discharge detector. The generator is configured to generate a DC voltage when an enable signal is applied to the generator. The electrical connector lines connect the generator to a voltage converter for the voltage converter to receive the DC voltage from the generator. The enabling signal source is configured to apply the enable signal to the generator. The arc discharge detector is configured to detect for an arc discharge by detecting for the presence on the connector lines of an AC voltage signal having characteristics indicative of an arc discharge. The arc discharge detector is further configured to cause the enabling signal source to stop applying the enable signal to the generator when an arc discharge is detected.

主权项

1. A photovoltaic installation comprising:
a photovoltaic generator including photovoltaic modules connected in series for generating a DC voltage signal; a pair of electrical connector lines connected respectively to first and last ones of the photovoltaic modules for receiving the DC voltage signal; an enabling signal generator configured to apply an enable signal to the photovoltaic modules; wherein each photovoltaic module has a DC electric-power generator and a switch arranged in parallel with one another, wherein the switches are switchable to be opened when the enable signal is applied to the photovoltaic modules and to be closed when the enable signal is absent from the photovoltaic modules, wherein when closed the switches short circuit each DC electric-power generator; an arc discharge detector connected across the connector lines and configured to detect for an arc discharge while the connector lines receive the DC voltage signal by detecting for the presence on the connector lines of an AC voltage signal having broad-band, high-frequency AC voltage signal components within a sub-region of the frequency band between 100 kHz and 1 MHz indicative of a series or parallel arc discharge, wherein the arc discharge detector is further configured to cause the enabling signal generator to stop applying the enable signal when an arc discharge is detected.