Coordinated Control Strategy of Multiple Active Power Filters in Distribution Lines with New Energy Devices

As a large number of new energy devices are connected to the distribution network, the harmonic pollution in the distribution network is characterized by high density and decentralization. This article first analyzes the amplifying mechanism of harmonics in distribution lines, and uses active power filters (APF) to control harmonics in distribution networks. Distributed and coordinated optimized management of harmonics by multiple APFs in the distribution network is realized. Finally, three APFs with different rated capacities are configured on the established 10-node distribution line model to coordinate harmonic compensation. The simulation results show that this strategy can effectively and dynamically coordinate the output of each APF participating in harmonic compensation.