A consideration on current noise measurement in distributed power supply introduction system

In recent years, the introduction of solar power generation equipment has increased as distributed power supply has increased. A power conditioning subsystem (PCS) of a solar power generation system is an apparatus using an integrated circuit. Switching noise is generated because the inverter, which is the main constituent element of the PCS, performs DC-AC conversion through high-frequency switching. The power supply noise generated at the AC side output terminal connected to the distribution line is regulated by the CISPR standard as a power line conduction disturbance wave, and the amount of electromagnetic disturbance generated is regulated in most countries around the world. However, there is currently no CISPR standard on the amount of generated electromagnetic interference for photovoltaic power generation systems. In recent years, however this topic is being studied for standardization. Therefore, in this paper, noise measurement was carried out at the PCS of a solar power generation system and was subsequently examined.