Voltage Fluctuation Test for LED Lighting -Assessment of Relations between ΔV10 Flicker Index and Illuminance Change-

In this study, we investigate illuminance flicker caused by voltage fluctuations originating from power inverters in photovoltaic (PV) systems, with a particular focus on LED lighting. As the integration of renewable energy sources such as solar power continues to expand, the impact of inverter-induced voltage fluctuations on end-user equipment has become an increasingly significant concern. Particularly in Japan, the control function employed in PV systems to prevent unintended islanding induces voltage fluctuations at frequencies of 3 or 6 Hz. Among these effects, flickering in lighting systems has attracted attention because it can cause discomfort and degrade the perceived quality of lighting environments.