Modeling and Prediction of Radiated Emission From Solar Cell in a Photovoltaic Generation System

Recently, the negative effect of leakage current in the dc side of photovoltaic (PV) generation systems has been widely reported. Due to the large area of PV arrays, it becomes a secondary noise source that generates radiation emission. This paper presents a detailed analysis of near-field radiation of PV panels. A novel antenna model is proposed to study this phenomenon. In contrast with other literature, the novelty of this paper reveals that radiation emission should be divided into two categories: megahertz-level low-frequency emission and gigahertz-level high-frequency emission. It is derived from the proposed planar antenna equivalent model and microstrip antenna equivalent model, respectively. It is proven that near-field distribution of the PV panel is frequency related and that high-frequency near-field emission can differ dramatically from the low-frequency condition. These proposed concepts have been verified experimentally with in-circuit tests in a 100-kVA PV generation system.