Source and Load Impedance Mismatch Analysis of a Power Line Filter in Microgrid Application

Operation of microgrids requires intensive monitoring and control between components through a communication network. A harsh signal environment in a microgrid might disrupt the communication and lead to component failures. Filters are required to protect the critical equipment and ensure seamless communication while filters could also influence communication signals. This paper analyzes the filter effectiveness in microgrid applications, which is illustrated by a mismatch between source and load impedances. The observed filter includes components' parasitics and imperfect inductor coupling as its nonideal characteristics. Due to the converter's switching frequency, a mismatch between source and load impedances, and unintentional inductance in the ground wire, reduced attenuation could be expected for a filter that is implemented in a microgrid.