Influence of Bus Bar Wiring Shape in PV Module on Surrounding Magnetic Field

Abstract

　Photovoltaic power generation systems have an electromagnetic interference problem caused by switching of power conditioning systems. As an example of this electromagnetic interference, interference to the AM radio band has been reported. It has also been reported that a bus bar, which is one of the internal wirings of a solar cell, is formed as an antenna. In this paper, the influence of the number of bending steps of the bus bar on the magnetic field was analyzed by the finite element method. As a result, it was found that when the bus bar has even-numbered stages, the magnetic flux density at the center is smaller than that of the odd-numbered stages.