Research Review on Power Quality Improvement in Distribution Networks via Charging Pile Integration

With the evolution of the distribution network to an active bidirectional interactive system, as an important active load interface in the distribution network, the large-scale access of charging piles not only brings challenges to the power quality of the distribution network but also provides opportunities for power quality regulation and optimization. This paper discusses the main factors affecting the power quality of the distribution network due to charging piles. The power quality problems such as voltage fluctuation and harmonics caused by charging piles are described. Then, the key technologies and potential of charging piles in power quality management are summarized, focusing on the technical progress in harmonic suppression and voltage regulation. Finally, the paper provides an outlook on the optimization directions of related technologies. This paper reveals the positive role of charging piles in power quality management of distribution networks from the perspective of devices. It provides a reference for future research on the participation of large-scale charging pile integration in power quality management.