Radio Interference of Photovoltaic Power Systems
Abstract: One important part of a photovoltaic (PV) power system is the inverter, which transforms the DC current from the solar generator into AC current. Thus a connection to public mains
The electromagnetic interference source of the solar inverter is a power circuit with high frequency change, which is also difficult to solve. The sensitive equipment is external and will not be affected by the inverter control, so the key is to disconnect the coupling path.
To avoid interference by PV systems at airports, the following measures are suggested . The PV installations should be located at least 200–250 ft away from the communication systems. PVI should be avoided where they might cause interference to navigational aids. Radar absorbing material could be used to reduce unwanted signal reflections.
While the risk of electro-magnetic and/ or radar interference from PV systems is very low, it does merit evaluation, if only to improve the confidence of site owners and other stakeholders.
Keyer et al. compared emissions from two commercially available solar PV inverters at the actual PV installations and reported that solar PV installations can interfere with amateur radio operation particularly in the frequency range of 10 MHz to 50 MHz. They proposed that the DC cables can act as a tuned antenna.
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