Passive filter installation for harmonic mitigation in residential distribution systems

The widespread adoption of converter-based residential loads and energy sources has led to increased injection of harmonic currents into distribution systems. The passive filter is adopted for mitigating harmonic distortions. In the previous study, filter topology design, filter parameter optimization, and optimal filter placement have been well developed. It was proven that the combination of single-tuned filters is an appropriate approach to mitigate the 3
^rd
, 5
^th
, and 7
^th
characteristic harmonics in distribution systems. Furthermore, it is an economic choice to place the filter at the house entrance side, which is called the “plug-in filter”. This paper conducts a comprehensive simulation study on the effect of the plug-in filter in mitigating the harmonic distortion in residential distribution systems. The simulation is done with a detailed system model, and the results can represent the practical situation.